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INSTALLATION INSTRUCTIONS
Wall Mounted Packaged Heat Pumps Standard & Dehumidification
Models:
T42H1 T42H1D T48H1 T48H1D

Bard Manufacturing Company, Inc. Bryan, Ohio 43506
www.bardhvac.com

Manual: 2100-541E

Supersedes: 2100-541D

Date:

5-14-21

Page

1 of 27

CONTENTS

Getting Other Information and Publications

3

Wall Mount General Information Wall Mount Model Nomenclature ………………………… 4 Shipping Damage …………………………………………….. 4 General ……………………………………………………….. 4 Duct Work ……………………………………………………….. 5 Filters ……………………………………………………….. 5 Fresh Air Intake………………………………………………… 5 Condensate Drain ……………………………………………. 5

Installation Instructions Wall Mounting Information …………………………………. 6 Mounting the Unit……………………………………………… 6 Placement ……………………………………………………….. 6 Clearances Required ………………………………………… 6 Minimum Clearances ………………………………………… 6 Wiring ­ Main Power……………………………………….. 12 Wiring ­ Low Voltage Wiring …………………………….. 12 Optional Outdoor T-Stat Applications…………………. 13

Start Up General ……………………………………………………… 15 Topping Off System Charge……………………………… 15 Safety Practices ……………………………………………… 15 Important Installer Note……………………………………. 16 High & Low Pressure Switch…………………………….. 16 Three Phase Scroll Compressor……………………….. 16 Phase Monitor………………………………………………… 16 Service Hints………………………………………………….. 16 Sequence of Operation ……………………………………. 17 Pressure Service Ports ……………………………………. 17 Defrost Cycle …………………………………………………. 17
Troubleshooting Solid State Heat Pump Control …………………………. 19 Checking Temperature Sensor …………………………. 20 Fan Blade Setting Dimensions………………………….. 21 Removal of Fan Shroud …………………………………… 21 R-410A Refrigerant Charge ……………………………… 21 Troubleshooting ECM Motors …………………………… 26 Troubleshooting ECM Motors …………………………… 27

Figures Figure 1 Fresh Air Damper Assembly………………… 5 Figure 2 Unit Dimensions ………………………………… 7 Figure 3 Mounting Instructions T42, 48……………… 8 Figure 4 Electric Heat Clearance ……………………… 9 Figure 5 Wall Mounting Instructions ………………… 10 Figure 6 Wall Mounting Instructions ………………… 10 Figure 7 Common Wall Mounting Installations ….. 11 Figure 8 Compressor Cutoff …………………………… 13 Figure 9 Compressor Cutoff …………………………… 13 Figure 10 Electric Heat Hold-Off Wiring …………….. 14 Figure 11 Electric Heat Hold-Off Wiring …………….. 14 Figure 12 Defrost Control Board ………………………. 18 Figure 13 Fan Blade Setting…………………………….. 21 Figure 14 Control Disassembly ………………………… 27 Figure 15 Winding Test……………………………………. 27 Figure 16 Drip Loop………………………………………… 27

Tables Table 1 Clearances Required …………………………. 6 Table 2 Min. Clearances Required…………………… 6 Table 3 Troubleshooting……………………………….. 19 Table Temperature F vs. Resistance …………… 20 Table 4 Fan Blade Dimension……………………….. 21 Table 5A Cooling Pressure……………………………… 22 Table 5B Heating Pressure …………………………….. 22 Table 6A Electrical Specifications T**H…………….. 23 Table 6B Electrical Specifications T**H Dehum. … 24 Table 7 Indoor Blower Performance ………………. 25

Manual 2100-541E Page 2 of 27

GETTING OTHER INFORMATION AND PUBLICATIONS

These publications can help when installing the air conditioner or heat pump. They can usually be found at the local library or purchase them directly from the publisher. Be sure to consult current edition of each standard.
National Electrical Code ………………….. ANSI/NFPA 70
Standard for the Installation…………… ANSI/NFPA 90A of Air Conditioning and Ventilating Systems
Standard for Warm Air ………………….. ANSI/NFPA 90B Heating and Air Conditioning Systems
Load Calculation for ……………………. ACCA Manual J Residential Winter and Summer Air Conditioning
Duct Design for Residential…………… ACCA Manual D Winter and Summer Air Conditioning and Equipment Selection

FOR MORE INFORMATION, CONTACT THESE PUBLISHERS:

ACCA

Air Conditioning Contractors of America 1712 New Hampshire Ave. N.W. Washington, DC 20009 Telephone: (202) 483-9370 Fax: (202) 234-4721

ANSI

American National Standards Institute 11 West Street, 13th Floor New York, NY 10036 Telephone: (212) 642-4900 Fax: (212) 302-1286

ASHRAE American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc. 1791 Tullie Circle, N.E. Atlanta, GA 30329-2305 Telephone: (404) 636-8400 Fax: (404) 321-5478

NFPA

National Fire Protection Association Batterymarch Park P.O. Box 9101 Quincy, MA 02269-9901 Telephone: (800) 344-3555 Fax: (617) 984-7057

Manual 2100-541E

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WALL MOUNT GENERAL INFORMATION

HEAT PUMP WALL MOUNT MODEL NOMENCLATURE

T
MODEL NUMBER

42 H 1 ­ A
REVISIONS

CAPACITY 42 – 3½ Ton 48 – 4 Ton

H – Heat Pump

VOLTS & PHASE A – 230/208/60/1 B – 230/208/60/3 C – 460/60/3

SPECIALTY PRODUCTS (Non-Standard)

10
KW 0Z – 0KW 04 – 4KW 05 – 5KW 06 – 6KW F8 – 8KW S8 – 8KW 09 – 9KW 10 -10KW 15 -15KW 20 -20KW

VENTILATION OPTIONS X – Barometric Fresh Air Damper (Standard) B – Blank-off Plate M – Motorized Fresh Air Damper C – Commercial Ventilator – Mod. Spring Return w/Exhaust V – Commercial Ventilator – Spring Return w/Exhaust P – Commercial Ventilator – Power Return w/Exhaust E – Economizer (Internal) – Fully Modulating with Exhaust R – Energy Recovery Ventilator – Motorized with Exhaust
(See Spec. Sheet S3398)

X X X XX X
CONTROL MODULES (See Spec. Sheet S3436)

COLOR OPTIONS X – Beige 1 – White 4 – Buckeye Gray 5 – Desert Brown 8 – Dark Bronze A – Aluminum S – Stainless Steel

COIL OPTIONS X – Standard 1 – Phenolic Coated Evaporator 2 – Phenolic Coated Condenser 3 – Phenolic Coated Evaporator
and Condenser
OUTLET OPTIONS X – Front (Standard)

FILTER OPTIONS X – 1-Inch Fiberglass (MERV 2) N – 2-Inch Pleated (MERV 13) M – 2-Inch Pleated (MERV 11) H – 2-Inch Pleated (MERV 8) P – 2-Inch Pleated (MERV 6) E – 24V 1″ Electrostatic Air Cleaner B – NPBI TECH + 2-Inch Pleated (MERV 13) A – UV-C + 2-Inch Pleated (MERV 13)

For 0 KW and circuit breakers (230/208 volt) or toggle disconnect (460V) applications, insert 0Z in the KW field of the model number. See Pages 23 & 24. Insert “D” for dehumidification with hot gas reheat. Reference Form 7960-627 for complete details.
NOTE: Vent options X, B and M are without exhaust capability. May require separate field supplied barometric relief in building.

SHIPPING DAMAGE
Upon receipt of equipment, the carton should be checked for external signs of shipping damage. If damage is found, the receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent.
GENERAL
The equipment covered in this manual is to be installed by trained, experienced service and installation technicians.
The refrigerant system is completely assembled and charged. All internal wiring is complete.
The unit is designed for use with or without duct work. Flanges are provided for attaching the supply and return ducts.
These instructions explain the recommended method to install the air cooled self-contained unit and the electrical wiring connections to the unit.

These instructions and any instructions packaged with any separate equipment required to make up the entire air conditioning system should be carefully read before beginning the installation. Note particularly “Starting Procedure” and any tags and/or labels attached to the equipment.
While these instructions are intended as a general recommended guide, they do not supersede any national and/or local codes in any way. Authorities having jurisdiction should be consulted before the installation is made. See Page 3 for information on codes and standards.
Size of unit for a proposed installation should be based on heat loss/gain calculation made according to methods of Air Conditioning Contractors of America (ACCA). The air duct should be installed in accordance with the Standards of the National Fire Protection Association for the Installation of Air Conditioning and Ventilating Systems of Other Than Residence Type, NFPA No. 90A, and Residence Type Warm Air Heating and Air Conditioning Systems, NFPA No. 90B. Where local regulations are at a variance with instructions, installer should adhere to local codes.

Manual 2100-541E Page 4 of 27

DUCT WORK
All duct work, supply and return, must be properly sized for the design airflow requirement of the equipment. Air Conditioning Contractors of America (ACCA) is an excellent guide to proper sizing. All duct work or portions thereof not in the conditioned space should be properly insulated in order to both conserve energy and prevent condensation or moisture damage.
Design the duct work according to methods given by the Air Conditioning Contractors of America (ACCA). When duct runs through unheated spaces, it should be insulated with a minimum of one inch of insulation. Use insulation with a vapor barrier on the outside of the insulation. Flexible joints should be used to connect the duct work to the equipment in order to keep the noise transmission to a minimum.
A 1/4 inch clearance to combustible material for the first three feet of duct attached to the outlet air frame is required. See Wall Mounting Instructions and Figures 3 and 4 for further details.
Ducts through the walls must be insulated and all joints taped or sealed to prevent air or moisture entering the wall cavity.
Some installations may not require any return air duct. A metallic return air grille is required with installations not requiring a return air duct. The spacing between louvers on the grille shall not be larger than 5/8 inch.
Any grille that meets with 5/8 inch louver criteria may be used. It is recommended that Bard Return Air Grille Kit RG2 through RG5 or RFG2 through RFG5 be installed when no return duct is used. Contact distributor or factory for ordering information. If using a return air filter grille, filters must be of sufficient size to allow a maximum velocity of 400 fpm.
NOTE: If no return air duct is used, applicable installation codes may limit this cabinet to installation only in a single story structure.

FILTERS
A 1-inch throwaway filter is standard with each unit. The filter slides into position making it easy to service. This filter can be serviced from the outside by removing the filter access panel. 2-inch pleated filters are also available as optional accessories. The internal filter brackets are adjustable to accommodate the 2-inch filter by bending two (2) tabs down on each side of the filter support bracket.
FRESH AIR INTAKE
All units are built with fresh air inlet slots punched in the service door.
If the unit is equipped with a fresh air damper assembly, the assembly is shipped already attached to the unit. The damper blade is locked in the closed position. To allow the damper to operate, the maximum and minimum blade position stops must be installed. See Figure 1.
All capacity, efficiency and cost of operation information is based upon the fresh air blank-off plate in place and is recommended for maximum energy efficiency.
The blank-off plate is available upon request from the factory and is installed in place of the fresh air damper shipped with each unit.
CONDENSATE DRAIN
A plastic drain hose extends from the drain pan at the top of the unit down to the unit base. There are openings in the unit base for the drain hose to pass through. In the event the drain hose is connected to a drain system of some type, it must be an open or vented type system to ensure proper drainage.

FIGURE 1 FRESH AIR DAMPER

Manual 2100-541E

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INSTALLATION INSTRUCTIONS

WALL MOUNTING INFORMATION
1. Two holes for the supply and return air openings must be cut through the wall as shown in Figure 3.
2. On wood frame walls, the wall construction must be strong and rigid enough to carry the weight of the unit without transmitting any unit vibration.
3. Concrete block walls must be thoroughly inspected to insure that they are capable of carrying the weight of the installed unit.
MOUNTING THE UNIT
1. These units are secured by wall mounting brackets which secure the unit to the outside wall surface at both sides. A bottom mounting bracket, attached to skid for shipping, is provided for ease of installation, but is not required.
2. The unit itself is suitable for 0 inch clearance, but the supply air duct flange and the first 3 feet of supply air duct require a minimum of 1/4 inch clearance to combustible material. However, it is generally recommended that a 1-inch clearance is used for ease of installation and maintaining the required clearance to combustible material. See Figure 3 for details on opening sizes.
3. Locate and mark lag bolt locations and bottom mounting bracket location. See Figure 3.
4. Mount bottom mounting bracket.
5. Hook top rain flashing, attached to front – right of supply flange for shipping, under back bend of top.
6. Position unit in opening and secure with 5/16 lag bolts; use 7/8 inch diameter flat washers on the lag bolts.
7. Secure rain flashing to wall and caulk across entire length of top. See Figure 3.
8. For additional mounting rigidity, the return air and supply air frames or collars can be drilled and screwed or welded to the structural wall itself (depending upon wall construction). Be sure to observe required clearance if combustible wall.

WARNING
Failure to provide the 1/4 inch clearance between the supply duct and a combustible surface for the first 3 feet of duct can result in fire causing damage, injury or death.
PLACEMENT
1. On side-by-side installations, maintain a minimum of 20 inches clearance on right side to allow access to control panel and heat strips, and to allow proper airflow to the outdoor coil. Additional clearance may be required to meet local or national codes.
2. Care should be taken to ensure that the recirculation and obstruction of condenser discharge air does not occur. Recirculation of condenser discharge air can be from either a single unit or multiple units. Any object such as shrubbery, a building or a large object can cause obstructions to the condenser discharge air. Recirculation or reduced airflow caused by obstructions will result in reduced capacity, possible unit pressure safety lockouts and reduced unit service life.
Units with a blow through condenser, such as the T**H 10 EER units, it is recommended there be a minimum distance of 15 feet between the front of the unit and any barrier or 20 feet between the fronts of two opposing (facing) units.

Clearances Required for Service Access and Adequate Condenser Airflow

MODELS

LEFT SIDE RIGHT SIDE

T42H, T48H

20″

20″

Minimum Clearances Required to Combustible Materials

MODELS

SUPPLY AIR DUCT FIRST THREE FEET

CABINET

T42H, T48H

1/4″

0″

Manual 2100-541E Page 6 of 27

FIGURE 2

Dimensions of Basic Unit for Architectural and Installation Requirements (Nominal)

Model

Width Depth Height (W) (D) (H)

Supply AB

Return CB

E

F

G

I

J K L M N O P QRS T

T42H 42.075 22.432 84.875 9.88 29.88 15.88 29.88 43.88 13.56 31.66 30.00 32.68 26.94 34.69 32.43 3.37 43.00 23.88 10.00 1.44 16.00 1.88

T48H 42.075 22.432 93.000 9.88 29.88 15.88 29.88 43.88 13.56 37.00 30.00 40.81 35.06 42.81 40.56 3.37 43.00 31.00 10.00 1.44 16.00 10.00

All dimensions are in inches. Dimensional drawings are not to scale.

T**H RIGHT UNIT
W

5.75 F

G

Condenser

Air Outlet

Front View

Built In Rain Hood
4° Pitch Heater Access Panel
Electric Heat
C. Breaker/ Disconnect Access Panel (Lockable)
Filter Access Panel
Vent Option Door
Ventilation Air
Low Voltage Electrical Entrance
High Voltage Electrical Entrance

D
2.13 Side Wall
A Mounting Brackets (Built In)
I Top Rain Flashing Shipping Location
Optional C H Electrical
Entrances

Cond.

K

Air

J

Inlet

L M P

Side View Drain

N

E O
.44 R
Supply Air Opening
S B
S

Return Air Opening

S

S1

1
S

T

Back View Bottom Installation

Q

Bracket

MIS-2729 A

Manual 2100-541E

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Manual 2100-541E Page 8 of 27

FIGURE 3 T42H1, T48H1 MOUNTING INSTRUCTIONS

SEAL WITH BEAD

OF CAULKING ALONG

ENTIRE LENGTH OF

A

B

C

D

E

TOP.

REQUIRED DIMENSIONS TO MAINTAIN 30 1/2 10 1/2 6 1/4 1 1/4 29 3/4

1/4″ MIN. CLEARANCE FROM

TOP

COMBUSTIBLE MATERIALS

REQUIRED DIMENSIONS TO MAINTAIN 32 12 5 1/2 2

29

RECOMMENDED 1″ CLEARANCE FROM

COMBUSTIBLE MATERIALS

WALL

D

C

A

C

Supply Opening

B

16″

HEATER ACCESS PANEL

RAIN FLASHING SUPPLIED
FOAM AIR SEAL

WALL STRUCTURE

SUPPLY AIR DUCT

1/4″ CLEARANCE ON ALL FOUR SIDES OF SUPPLY AIR DUCT IS REQUIRED FROM COMBUSTABLE MATERIALS

16″

E

16″

Return Opening

16″

1

16″

6

1 2

”

30″

1
16″

3″ 1″

4″

3

1 8

”

Typ.

7 8

”

2

1

7 8

”

4″

6

1 2

”

Typ.

6

1 2

”

1 Dimension is 21″ on 95″ tall units. 2 Dimension is 10″ on T48H1 & T60H1. 3 Dimension is 6″ on T48H1 & T60H1.

Wall Opening and Hole Location View

2

1 8

”

3

RETURN AIR OPENING
NOTES:
IT IS RECOMMENDED THAT A BEAD OF SILICONE CAULKING BE PLACED BEHIND THE SIDE MOUNTING FLANGES AND UNDER TOP FLASHING AT TIME OF INSTALLATION.

Right Side View

MIS-416 E

FIGURE 4 ELECTRIC HEAT CLEARANCE

SIDE SECTION VIEW OF SUPPLY AIR DUCT FOR WALL MOUNTED UNIT SHOWING 1/4 INCH CLEARANCE TO COMBUSTIBLE SURFACES.
WARNING
A minimum of 1/4 inch clearance must be maintained between the supply air duct and combustible materials. This is required for the first 3 feet of ducting. It is important to insure that the 1/4 inch minimum spacing is maintained at all points. Failure to do this could result in overheating the combustible material and may result in a fire causing damage, injury or death.

Manual 2100-541E

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FIGURE 5 WALL MOUNTING INSTRUCTIONS

SEE FIGURE 3 ­ MOUNTING INSTRUCTIONS

FACTORY SUPPLIED RAIN FLASHING. MOUNT ON UNIT
BEFORE INSTALLATION

WALL STRUCTURE

SUPPLY AIR OPENING

SUPPLY AIR OPENING

SUPPLY AIR DUCT

RETURN AIR OPENING

RETURN AIR OPENING

RETURN AIR OPENING

CONCRETE BLOCK WALL INSTALLATION

WOOD OR STEEL SIDING
WOOD FRAME WALL INSTALLATION

BOTTOM MOUNTING BRACKET. MOUNT ON
WALL BEFORE INSTALLING UNIT.
SIDE VIEW

MIS-548 A

MIS-549 B
Manual 2100-541E Page 10 of 27

FIGURE 6 WALL MOUNTING INSTRUCTIONS

ATTACH TO TOP PLATE OF WALL

SEE UNIT DIMENSIONS, FIGURE 2, FOR ACTUAL DIMENSIONS.
E + 1.000 B

1.000″ CLEARANCE ALL AROUND DUCT
INTERIOR FINISHED WALL OVER FRAME
1.000″ CLEARANCE ALL AROUND DUCT
EXTERIOR FINISH WALL OVER FRAME

SUPPLY DUCT OPENING
RETURN DUCT OPENING
2 x 6 CL

1.000 A I C K

FRAMING MATERIAL 2 x 4’S, 2 x 6’S &/OR
STRUCTURAL STEEL

ATTACH TO BOTTOM PLATE OF WALL

THIS STRUCTURAL MEMBER LOCATED TO MATCH STUD SPACING FOR REST OF WALL. A SECOND MEMBER MAY BE REQUIRED FOR SOME WALLS.

FIGURE 7 COMMON WALL MOUNTING INSTALLATIONS

Non-Ducted Installations

Unit is sealed to wall.
Wall Mount Unit

Ceiling Supply Air Adjustable Supply Grille
Fixed Blade Return Grille

Ducted Installations

Unit is sealed to wall.
Wall Mount Unit

Ceiling
Supply Air Duct Optional Dropped Ceiling Fixed Blade Return Grille

Outside Wall Room Air
Outside Wall Supply Air Supply Air

Return Air Return Air

Room Air

Indoor Area

Indoor Area

Non-ducted installations supply conditioned air into indoor room areas without extensive duct work. The supply airstream is directed by adjusting the 4-way supply grille to reach areas being conditioned. The supply air mixes with the room air and cools or heats occupants and/or equipment in the area. Unconditioned room air is returned to the unit through the return grille. Avoid supply air leaving supply grille and re-entering the unit return grille without mixing with room air.

Ducted installations supply conditioned air into indoor room areas using solid or flexible ducts. The supply air is distributed throughout a single area or multiple areas. The supply air mixes with the room air and cools or heats occupants and/or equipment. Unconditioned room air is returned to the unit through a return grille or return duct work. Avoid using restrictive duct work to provide the best unit performance and efficiency. Review duct static pressure requirements provided in this manual.

Outdoor Wall Curb Installations

Curb is sealed to wall.

Ceiling

Supply Air

Wall Mount Unit

Adjustable Supply Grille Fixed Blade Return Grille

WAPR11 Indoor Sound Plenum Installations

Unit is sealed to wall.

Ceiling

Wall Mount Unit

Supply Air Duct Optional Dropped Ceiling

Wall Curb Outside Wall
Room Air Outside Wall
Supply Air Supply Air

Return Air

Unit is sealed to curb.

Indoor Area

Outdoor Wall curbs are installed between the wall mount unit and the outer wall surface. Wall curb use may avoid resizing supply and return openings that are currently in an existing wall. Wall curbs may also provide sound isolation and indoor area sound reduction. Various curb options are available, and it is important to select a curb that will meet the application requirements and also be the correct size for the unit. Unit duct static requirements cannot be exceeded when using a wall curb. Follow all instructions provided with the wall curb when installing the product.

WAPR11 Plenum

Return Air

Room Air Indoor Area

Indoor sound plenums are installed inside the room over the unit return air opening. Plenum use can provide sound isolation and indoor area sound reduction. The WAPR11 sound plenum provides a single solution for all unit tonnage sizes. The WAPR11 may be installed horizontally or vertically in the room. Unit duct static requirements cannot be exceeded when using a sound plenum. Follow all instructions provided with the sound plenum when installing the product.
MIS-550 D

Manual 2100-541E

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WIRING ­ MAIN POWER
Refer to the unit rating plate for wire sizing information and maximum fuse or “HACR” type circuit breaker size. Each outdoor unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring used must be sized to carry that amount of current. Depending on the installed KW of electric heat, there may be two field power circuits required. If this is the case, the unit serial plate will so indicate. All models are suitable only for connection with copper wire. Each unit and/or wiring diagram will be marked “Use Copper Conductors Only”. These instructions must be adhered to. Refer to the National Electrical Code (NEC) for complete current carrying capacity data on the various insulation grades of wiring material. All wiring must conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75°C copper) for all models including the most commonly used heater sizes. Also shown are the number of field power circuits required for the various models with heaters.
The unit rating plate lists a “Maximum Time Delay Relay Fuse” or “HACR” type circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor motor.
The disconnect access door on this unit may be locked to prevent unauthorized access to the disconnect. To convert for the locking capability, bend the tab located in the bottom left-hand corner of the disconnect opening under the disconnect access panel straight out. This tab will now line up with the slot in the door. When shut, a padlock may be placed through the hole in the tab preventing entry.
See “Start Up” section for important information on three phase scroll compressor start ups.
See Tables 6A & 6B for Electrical Specifications.

WIRING ­ LOW VOLTAGE WIRING

230/208V, 1 phase and 3 phase equipment dual primary voltage transformers. All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240 and 208V taps are:

TAP 240 208

RANGE 253 ­ 216 220 ­ 187

NOTE: The voltage should be measured at the field power connection point in the unit and while the unit is operating at full load (maximum amperage operating condition).

For wiring size and connections, refer to Wiring Manual 2100-516.

Manual 2100-541E Page 12 of 27

FIGURE 8 COMPRESSOR CUTOFF THERMOSTAT WIRING
4 ­ 10KW 1 PH ­ 6 & 9KW 3 PH
FIGURE 9 COMPRESSOR CUTOFF THERMOSTAT WIRING
15 ­ 20KW 1 PH AND 3 PH

OPTIONAL OUTDOOR THERMOSTAT APPLICATIONS
Since most equipment at the time of manufacture is not designated for any specific destination of the country and are installed in areas not approaching the lower outdoor temperature range, outdoor thermostats are not factory installed as standard equipment, but are offered as an option. There are also different applications for applying outdoor thermostats. The set point of either type of outdoor thermostat application is variable with geographic region and sizing of the heating equipment to the individual structure. Utilization of the heating Application Data, and the heat loss calculation of the building are useful in determining the correct set points.
NOTE: The additional LAB (low ambient bypass) relay is required to prevent heater operation during low temperature cooling operation.

OPTIONAL COMPRESSOR CUTOFF THERMOSTAT (See Figures 8 & 9)
Heat pump compressor operation at outdoor temperatures below 0°F are neither desirable nor advantageous in term of efficiency. An outdoor thermostat can be applied to take the mechanical heating (compressor) off line, and send the (compressor) signal to energize electric heat in its place (to make electric heat first stage heating). This can also be applied to bank the quantity of available electric heat. For example: A heat pump operates with 10KW second stage heat ­ once the outdoor thermostat has switched then operates 15KW without the compressor as first stage heat.

Manual 2100-541E

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ELECTRIC HEAT HOLD-OFF (See Figures 10 & 11)
In other applications, it is desirable to disable the operation of the electric heat until outdoor temperatures have reached a certain design point. This won’t allow the electric heat to come on as second stage heating unless the outdoor temperature is below the set point of the outdoor thermostat. This is done to maximize

efficiency by utilizing the heat pump to bring the conditioned space temperature up, rather than cycling on the electric heat due a second stage call for heat from the thermostat on start-up coming off a night setback condition or someone increasing the thermostat set point. (NOTE: Some programmable thermostats do have a built-in time delay for pulling in second stage heat when coming off set-back conditions.)

FIGURE 10 ELECTRIC HEAT HOLD-OFF WIRING
4 ­ 10KW 1 PH — 6 & 9KW 3 PH

FIGURE 11 ELECTRIC HEAT HOLD-OFF WIRING
15 ­ 20KW 1 PH & 3 PH
Manual 2100-541E Page 14 of 27

START UP

THESE UNITS REQUIRE R-410A REFRIGERANT AND POLYOL ESTER OIL.
GENERAL:
1. Use separate service equipment to avoid cross contamination of oil and refrigerants.
2. Use recovery equipment rated for R-410A refrigerant.
3. Use manifold gauges rated for R-410A(800 psi/250 psi low).
4. R-410A is a binary blend of HFC-32 and HFC-125.
5. R-410A is nearly azeotropic – similar to R-22 and R-12. Although nearly azeotropic, charge with liquid refrigerant.
6. R-410A operates at 40-70% higher pressure than R-22, and systems designed for R-22 cannot withstand this higher pressure.
7. R-410A has an ozone depletion potential of zero, but must be reclaimed due to its global warming potential.
8. R-410A compressors use Polyol Ester oil.
9. Polyol Ester oil is hygroscopic; it will rapidly absorb moisture and strongly hold this moisture in the oil.
10. A liquid line dryer must be used – even a deep vacuum will not separate moisture from the oil.
11. Limit atmospheric exposure to 15 minutes.
12. If compressor removal is necessary, always plug compressor immediately after removal. Purge with small amount of nitrogen when inserting plugs.
TOPPING OFF SYSTEM CHARGE
If a leak has occurred in the system, Bard Manufacturing recommends reclaiming, evacuating (see criteria above), and charging to the nameplate charge. If done correctly, topping off the system charge can be done without problems.
With R-410A, there are no significant changes in the refrigerant composition during multiple leaks and recharges. R-410A refrigerant is close to being an azeotropic blend (it behaves like a pure compound or single component refrigerant). The remaining refrigerant charge, in the system, may be used after leaks have occurred and then “top-off” the charge by utilizing the pressure charts on the inner control panel cover as a guideline.

REMEMBER: When adding R-410A refrigerant, it must come out of the charging cylinder/tank as a liquid to avoid any fractionation, and to insure optimal system performance. Refer to instructions for the cylinder that is being utilized for proper method of liquid extraction.
WARNING
Failure to conform to these practices could lead to damage, injury or death.
SAFETY PRACTICES:
1. Never mix R-410A with other refrigerants. 2. Use gloves and safety glasses, Polyol Ester oils can
be irritating to the skin, and liquid refrigerant will freeze the skin. 3. Never use air and R-410A to leak check; the mixture may become flammable. 4. Do not inhale R-410A ­ the vapor attacks the nervous system, creating dizziness, loss of coordination and slurred speech. Cardiac irregularities, unconsciousness and ultimate death can result from breathing this concentration. 5. Do not burn R-410A. This decomposition produces hazardous vapors. Evacuate the area if exposed. 6. Use only cylinders rated DOT4BA/4BW 400. 7. Never fill cylinders over 80% of total capacity. 8. Store cylinders in a cool area, out of direct sunlight. 9. Never heat cylinders above 125°F. 10. Never trap liquid R-410A in manifold sets, gauge lines or cylinders. R-410A expands significantly at warmer temperatures. Once a cylinder or line is full of liquid, any further rise in temperature will cause it to burst.

Manual 2100-541E

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IMPORTANT INSTALLER NOTE
For improved start up performance wash the indoor coil with a dish washing detergent.
HIGH & LOW PRESSURE SWITCH
All T**H wall mounted air conditioner series models are supplied with a remote reset for the high and low pressure switch. If tripped, this pressure switch may be reset by turning the thermostat off then back on again.
THREE PHASE SCROLL COMPRESSOR START UP INFORMATION
Scroll compressors, like several other types of compressors, will only compress in one rotational direction. Direction of rotation is not an issue with single phase compressors since they will always start and run in the proper direction.
However, three phase compressors will rotate in either direction depending upon phasing of the power. Since there is a 50-50 chance of connecting power in such a way as to cause rotation in the reverse direction, verification of proper rotation must be made. Verification of proper rotation direction is made by observing that suction pressure drops and discharge pressure rises when the compressor is energized. Reverse rotation also results in an elevated sound level over that with correct rotation, as well as substantially reduced current draw compared to tabulated values.
Verification of proper rotation must be made at the time the equipment is put into service. If improper rotation is corrected at this time, there will be no negative impact on the durability of the compressor. However, reverse operation for over one hour may have a negative impact on the bearing due to oil pump out.
NOTE: If compressor is allowed to run in reverse rotation for several minutes, the compressor’s internal protector will trip.
All three phase ZP compressors are wired identically internally. As a result, once the correct phasing is determined for a specific system or installation, connecting properly phased power leads to the same Fusite terminal should maintain proper rotation direction.
The direction of rotation of the compressor may be changed by reversing any two line connections to the unit.

PHASE MONITOR
All units with three phase scroll compressors are equipped with a 3-phase line monitor to prevent compressor damage due to phase reversal.
The phase monitor in this unit is equipped with two LEDs. If the Y signal is present at the phase monitor and phases are correct the green LED will light.
If phases are reversed, the red fault LED will be lit and compressor operation is inhibited.
If a fault condition occurs, reverse two of the supply leads to the unit. Do not reverse any of the unit factory wires as damage may occur.
SERVICE HINTS
1. Caution owner/operator to maintain clean air filters at all times. Also, not to needlessly close off supply and return air registers. This reduces airflow through the system, which shortens equipment service life as well as increasing operating costs.
2. Check all power fuses or circuit breakers to be sure they are the correct rating.
3. Periodic cleaning of the outdoor coil to permit full and unrestricted airflow circulation is essential.

Manual 2100-541E Page 16 of 27

SEQUENCE OF OPERATION
COOLING ­ Circuit R-Y makes at thermostat pulling in compressor contactor, starting the compressor and outdoor motor. The G (indoor motor) circuit is automatically completed on any call for cooling operation or can be energized by manual fan switch on subbase for constant air circulation.
HEATING ­ A 24V solenoid coil on reversing valve controls heating cycle operation. Two thermostat options, one allowing “Auto” changeover from cycle to cycle and the other constantly energizing solenoid coil during heating season, and thus eliminating pressure equalization noise except during defrost, are to be used. On “Auto” option a circuit is completed from R-B and R-Y on each heating “on” cycle, energizing reversing valve solenoid and pulling in compressor contactor starting compressor and outdoor motor. R-G also make starting indoor blower motor. Heat pump heating cycle now in operation. The second option has no “Auto” changeover position, but instead energizes the reversing valve solenoid constantly whenever the system switch on subbase is placed in “Heat” position, the “B” terminal being constantly energized from R. A Thermostat demand for heat completes R-Y circuit, pulling in compressor contactor starting compressor and outdoor motor. R-G also make starting indoor blower motor.
PRESSURE SERVICE PORTS
High and low pressure service ports are installed on all units so that the system operating pressures can be observed. Pressure tables can be found later in the manual covering all models. It is imperative to match the correct pressure table to the unit by model number. See Tables 5A & 5B.
DEFROST CYCLE
The defrost cycle is controlled by temperature and time on the solid state heat pump control. When the outdoor temperature is in the lower 40°F temperature range or colder, the outdoor coil temperature is 32°F or below. This coil temperature is sensed by the coil temperature sensor mounted near the bottom of the outdoor coil. Once coil temperature reaches 30°F or below, the coil temperature sensor sends a signal to the control logic of the heat pump control and the defrost timer will start accumulating run time. After 30, 60 or 90 minutes of heat pump operation at 30°F or below, the heat pump control will place the system in the defrost mode. During the defrost mode, the refrigerant cycle switches back to the cooling cycle, the outdoor motor stops, electric heaters are energized, and hot gas passing through the outdoor coil melts any accumulated frost. When the temperature rises to approximately 57°F, the coil temperature sensor will send a signal to the heat pump control which will return the system to heating operations automatically. If some abnormal or temporary condition such as a high wind causes the heat pump to have a prolonged defrost cycle, the heat pump control will restore the system to heating operation automatically after 8 minutes. The heat pump defrost control board has an option of 30, 60 or 90-minute setting. By default, this unit is shipped from the factory with the defrost time on the 60 minute pin. If

circumstances require a change to another time, remove the wire from the 60-minute terminal and reconnect to the desired terminal. Refer to Figure 12. There is a cycle speed up jumper on the control. This can be used for testing purposes to reduce the time between defrost cycle operation without waiting for time to elapse. Use a small screwdriver or other metallic object, or another ¼ inch QC, to short between the SPEEDUP terminals to accelerate the HPC timer and initiate defrost. Be careful not to touch any other terminals with the instrument used to short the SPEEDUP terminals. It may take up to 10 seconds with the SPEEDUP terminals shorted for the speedup to be completed and the defrost cycle to start.
As soon as the defrost cycle kicks in remove the shorting instrument from the SPEEDUP terminals. Otherwise the timing will remain accelerated and run through the 1-minute minimum defrost length sequence in a matter of seconds and will automatically terminate the defrost sequence. There is an initiate defrost jumper (sen jump) on the control that can be used at any outdoor ambient during the heating cycle to simulate a 0° coil temperature. This can be used to check defrost operation of the unit without waiting for the outdoor ambient to fall into the defrost region. By placing a jumper across the SEN JMP terminals (a ¼ inch QC terminal works best) the defrost sensor mounted on the outdoor coil is shunted out & will activate the timing circuit. This permits the defrost cycle to be checked out in warmer weather conditions without the outdoor temperature having to fall into the defrost region. In order to terminate the defrost test the SEN JMP jumper must be removed. If left in place too long, the compressor could stop due to the high pressure control opening because of high pressure condition created by operating in the cooling mode with outdoor fan off. Pressure will rise fairly fast as there is likely no actual frost on the outdoor coil in this artificial test condition. There is also a 5-minute compressor time delay function built into the HPC. This is to protect the compressor from short cycling conditions. The board’s LED will have a fast blink rate when in the compressor time delay. In some instances, it is helpful to the service technician to override or speed up this timing period, and shorting out the SPEEDUP terminals for a few seconds can do this. Low Pressure Switch Bypass Operation – The control has a selectable (SW1) low pressure switch bypass set up to ignore the low pressure switch input during the first (30, 60, 120 or 180 seconds) of “Y” operation. After this period expires, the control will then monitor the low pressure switch input normally to make sure that the switch is closed during “Y” operation. High Pressure Switch Operation – The control has a built-in lockout system that allows the unit to have the high pressure switch trip up to two times in one hour and only encounter a “soft” lockout. A “soft” lockout shuts the compressor off and waits for the pressure switch to reset, which at that point then allows the compressor to be restarted as long as the 5-minute short cycle timer has run out. If the high pressure switch trips a third time within one hour, the unit is in “hard” lockout indicating something is certainly wrong and it will not restart itself.

Manual 2100-541E

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FIGURE 12 DEFROST CONTROL BOARD

LOW PRESSURE BYPASS TIMER SWITCH *(FACTORY SETTING 120 SECONDS)

SW SW 1 2 TIME (SEC) OFF OFF 30 ON OFF 60 OFF ON 120* ON ON 180
OFF
ON

ACCUMULATED DEFROST TIME TIMER (FACTORY SETTING 60 MIN.)

MIS-2668 A

Manual 2100-541E Page 18 of 27

TROUBLESHOOTING

SOLID STATE HEAT PUMP CONTROL TROUBLESHOOTING PROCEDURE
1. NOTE: A thorough understanding of the defrost cycle sequence is essential. Review that section earlier in this manual prior to troubleshooting the control. Turn on AC power supply to unit.
2. Turn thermostat blower switch to “fan on” ­ the indoor blower should start. (If it doesn’t, troubleshoot indoor unit and correct problem.)
3. Turn thermostat blower to “auto” position. Indoor blower should stop. NOTE: Many models have a 1-minute blower time delay on “off” command; wait for this to time-out.
4. Set system switch to “heat” or “cool”. Adjust thermostat to call for heat or cool. The indoor blower, compressor and outdoor fan should start.

NOTE: If there was no power to 24 volt transformer, the compressor and outdoor fan motor will not start for 5 minutes. This is because of the compressor short cycle protection.

LED BLINK CODES

BLINK FUNCTION

Slow Normal function (1.0 sec on/1.0 sec off)

Fast Compressor Delay timer active (0.1 sec on/0.1 sec off)

1

Low pressure switch failure

2

High pressure switch failure/”Soft” Lockout

3

Defrost mode active

4

High pressure switch failure/”Hard” Lockout

TABLE 3 TROUBLESHOOTING

Sympton Description, Check & Possible Causes

What & How to Check / Repair

1. Check for LED illumination. Is there an LED illuminated on the board (flashing)?

Yes = go to Step #2; No = go to Step #3

2. Check for error codes. Is the LED flashing a Code?

Yes = go to Step #4; No = go to Step #8

3. Check for power at board. Is there 24 volts AC between R and C?

Yes = go to Step #13; No = go to Step #9

4. Check codes. What code is blinking?

Code “1”, go to Step #6; Code “2”, go to Step#7; Fast Blink, go to Step #5

Compressor will not start (heating or cooling)

5. Compressor delay active. Wait for 5 minute delay or jump board’s “speed up pins”.

Check for proper operation; if still needed, go back to Step #1.

6. Low pressure fault.

Check wiring circuit and unit pressures.

7. High pressure fault.

Check wiring circuit and unit pressures.

8. Check for Compressor input signal. Is there 24 volts AC between Y and C?

Yes = go to Step #10; No = go to Step #11

9. No power to board.

The unit either does not have unit voltage, the transformer is bad or the unit wiring is incorrect.

10. Check for Compressor output signal. Is there 24 volts AC between CC & C?

Yes = go to Step #12; No = go to Step #13

11. No “Y” compressor input signal.

Check thermostat wiring, incorrect phase of unit (see section on Phase Monitor), and finally unit wiring.

12. No “CC” compressor output signal.

Check compressor contactor for proper operation and finally check compressor.

13. Faulty board.

Replace defrost board.

Fan outdoor Heat pump control defective motor does

not run (cooling or

Motor defective

heating except during defrost) Motor capacitor defective

Check across fan relay on heat pump control. (Com-NC) Replace heat pump control. Check for open or shorted motor winding. Replace motor.
Check capacitor rating. Check for open or shorted capacitor. Replace capacitor.

Reversing Heat pump control defective valve does not energize (heating only) Reversing valve solenoid coil defective

Unit will not go into defrost Temperature sensor or heat pump control defective (heating only)

Unit will not come out of defrost (heating only)

Temperature sensor or heat pump control defective

Check for 24V between RV-C and B-C. 1. Check control circuit wiring. 2. Replace heat pump control.
Check for open or shorted coil. Replace solenoid coil.
Disconnect temperature sensor from board and jumper across “SPEEDUP” terminals and “SEN JMP” terminals. This should cause the unit to go through a defrost cycle within one minute. 1. If unit goes through defrost cycle, replace temperature sensor. 2. If unit does not go through defrost cycle, replace heat pump control.
Jumper across “SPEEDUP” terminal. This should cause the unit to come out of defrost within one minute. 1. If unit comes out of defrost cycle, replace temperature sensor. 2. If unit does not come out of defrost cycle, replace heat pump control.

Manual 2100-541E

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CHECKING TEMPERATURE SENSOR OUTSIDE UNIT CIRCUIT
1. Disconnect temperature sensor from board and from outdoor coil.
2. Use an ohmmeter and measure the resistance of the sensor. Also use ohmmeter to check for short or open.

3. Check resistance reading to chart of resistance. Use sensor ambient temperature. (Tolerance of part is ± 10%.)
4. If sensor resistance reads very low, then sensor is shorted and will not allow proper operation of the heat pump control.
5. If sensor is out of tolerance, shorted, open or reads very low ohms then it should be replaced.

TEMPERATURE F VS. RESISTANCE R OF TEMPERATURE SENSOR

F

R

F

-25.0

196871

13.0

-24.0

190099

14.0

-23.0

183585

15.0

-22.0

177318

16.0

-21.0

171289

17.0

-20.0

165487

18.0

-19.0

159904

19.0

-18.0

154529

20.0

-17.0

149355

21.0

-16.0

144374

22.0

-15.0

139576

23.0

-14.0

134956

24.0

-13.0

130506

25.0

-12.0

126219

26.0

-11.0

122089

27.0

-10.0

118108

28.0

-9.0

114272

29.0

-8.0

110575

30.0

-7.0

107010

31.0

-6.0

103574

32.0

-5.0

100260

33.0

-4.0

97064

34.0

-3.0

93981

35.0

-2.0

91008

36.0

-1.0

88139

37.0

0.0

85371

38.0

1.0

82699

39.0

2.0

80121

40.0

3.0

77632

41.0

4.0

75230

42.0

5.0

72910

43.0

6.0

70670

44.0

7.0

68507

45.0

8.0

66418

46.0

9.0

64399

47.0

10.0

62449

48.0

11.0

60565

49.0

12.0

58745

50.0

R

F

56985

53.0

55284

52.0

53640

53.0

52051

54.0

50514

55.0

49028

56.0

47590

57.0

46200

58.0

44855

59.0

43554

60.0

42295

61.0

41077

62.0

39898

63.0

38757

64.0

37652

65.0

36583

66.0

35548

67.0

34545

68.0

33574

69.0

32634

70.0

31723

71.0

30840

72.0

29986

73.0

29157

74.0

28355

75.0

27577

76.0

26823

77.0

26092

78.0

25383

79.0

24696

80.0

24030

81.0

23384

82.0

22758

83.0

22150

84.0

21561

85.0

20989

86.0

20435

87.0

19896

88.0

R 19374 18867 18375 17989 17434 16984 16547 16122 15710 15310 14921 14544 14177 13820 13474 13137 12810 12492 12183 11883 11591 11307 11031 10762 10501 10247 10000
9760 9526 9299 9077 8862 8653 8449 8250 8057 7869 7686

F 89.0 90.0 91.0 92.0 93.0 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0

R 7507 7334 7165 7000 6840 6683 6531 6383 6239 6098 5961 5827 5697 5570 5446 5326 5208 5094 4982 4873 4767 4663 4562 4464 4367 4274 4182 4093 4006 3921 3838 3757 3678 3601 3526 3452

Manual 2100-541E Page 20 of 27

FAN BLADE SETTING DIMENSIONS
Shown in Figure 13 is the correct fan blade setting for proper air delivery across the outdoor coil. Refer to Table 4 for unit specific dimension.
Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions below be checked and blade adjusted in or out on the motor shaft accordingly.
FIGURE 13 FAN BLADE SETTING

AIRFLOW

“A”
MIS-1724

TABLE 4 FAN BLADE DIMENSION

Model
T42H T48H

Dimension A 1.75″

REMOVAL OF FAN SHROUD
1. Disconnect all power to the unit.
2. Remove the screws holding both grilles, one on each side of unit, and remove grilles.
3. Remove screws holding fan shroud to condenser and bottom. Nine (9) screws.
4. Unwire condenser fan motor.
5. Slide complete motor, fan blade, and shroud assembly out the left side of the unit.
6. Service motor/fan as needed.
7. Reverse steps to reinstall.
R-410A
REFRIGERANT CHARGE
This unit was charged at the factory with the quantity of refrigerant listed on the serial plate. AHRI capacity and efficiency ratings were determined by testing with this refrigerant charge quantity.
The following pressure tables show nominal pressures for the units. Since many installation specific situations can affect the pressure readings, this information should only be used by certified technicians as a guide for evaluating proper system performance. They shall not be used to adjust charge. If charge is in doubt, reclaim, evacuate and recharge the unit to the serial plate charge.

Manual 2100-541E

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21 of 27

TABLE 5A COOLING PRESSURE TABLE

Air Temperature Entering Outdoor Coil °F

Model

Return Air Temperature

Pressure

75

80

85

90

95

100 105 110 115 120

T42H T48H

75° DB

Low Side 131

132

134

136

137

139

142

144

146

149

62° WB

High Side 315

331

348

368

388

410

435

461

489

520

80° DB

Low Side 140

141

143

145

147

149

152

154

156

159

67° WB

High Side 323

339

357

377

402

421

446

473

502

533

85° DB

Low Side 145

146

148

150

152

154

157

159

161

165

72° WB

High Side 334

351

369

390

412

436

462

490

520

552

75° DB

Low Side 133

136

137

139

141

142

144

145

147

148

62° WB

High Side 325

341

360

379

401

424

449

477

505

535

80° DB

Low Side 142

145

147

149

151

152

154

155

157

158

67° WB

High Side 333

350

369

389

417

435

461

489

518

549

85° DB

Low Side 147

150

152

154

156

157

159

160

162

164

72° WB

High Side 345

362

382

403

425

450

477

506

536

568

Low side pressure ± 4 PSIG High side pressure ± 10 PSIG
Tables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct operating charge being in the system, the charge should be removed, system evacuated and recharged to serial plate charge weight. NOTE: Pressure table based on high speed condenser fan operation. If condensing pressures appear elevated check condenser fan wiring. See “Condenser Fan Operation”.

Model T42H T48H

TABLE 5B HEATING PRESSURES ­ (ALL TEMPERATURES °F)

Return Air Temperature

Pressure

0

5 10 15 20 25 30 35 40 45 50 55 60 65

70 deg. 70 deg.

Low Side High Side
Low Side High Side

40 45 51 57 63 70 78 85 93 102 110 119 129 139 294 296 299 305 311 319 329 340 353 368 384 401 420 441
39 45 50 56 62 69 76 84 92 100 108 117 127 137 260 264 268 273 279 285 293 300 309 319 329 339 351 363

Manual 2100-541E Page 22 of 27

TABLE 6A

Electrical Specifications — T**H Series

Single Circuit

Multiple Circuit

MODEL

Rated Volts, HZ & Phase

No. Field Power Circuits

Minimum
Circuit Ampacity

T42H1-A00, A0Z

1

31

-A05

1

57

-A08 230/208-60-1 1 or 2

73

-A10

1 or 2

83

-A15

1 or 2

86

T42H1-B00, B0Z

1

26

-B06 -B09

230/208-60-3

1 1

44 53

n -B15

1

53

T42H1-C0Z

1

13

-C06 -C09

460-60-3

1 1

22 26

n -C15

1

27

T48H1-A00, A0Z

1

37

-A05

1 or 2

63

-A08 230/208-60-1 1 or 2

79

-A10

1 or 2

89

-A15

1 or 2

89

T48H1-B00, B0Z

1

27

-B06 -B09

230/208-60-3

1 1

45 54

n -B15

1

55

T48H1-C0Z

1

15

-C06 -C09

460-60-3

1 1

24 28

n -C15

1

29

Maximum External
Fuse or Ckt. Brkr.
40 60 80 90 90 35 50 60 60 15 25 30 30 50 70 90 100 100 40 50 60 60 20 25 30 30

l Field Power Wire Size
8 6 4 4 3 8 8 6 6 12 10 10 10 8 6 4 3 3 8 8 6 6 12 10 10 10

l Ground
Wire

Minimum Circuit
Ampacity

Maximum

l

External Fuse or Field Power Wire

Ckt. Breaker

Size

l Ground Wire Size

Ckt. A Ckt. B Ckt. C Ckt. A Ckt. B Ckt. C Ckt. A Ckt. B Ckt. C Ckt. A Ckt. B Ckt. C

10

10

8

31 42

40 45

8

8

10 10

8

31 52

40 60

8

6

10 10

8

34 52

40 60

8

6

10 10

10

10

10

10

12

10

10

10

10

8

37 26

50 30

8 10

10 10

8

37 42

50 50

8

8

10 10

8

37 52

50 60

8

6

10 10

8

37 52

50 60

8

6

10 10

10

10

10

10

12

10

10

10

These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electrical code (latest version), Article 310 for power conductor sizing. CAUTION: When more than one field power circuit is run through one conduit, the conductors must be derated. Pay special attention to note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three (3) current carrying conductors are in a raceway.
Maximum size of the time delay fuse or circuit breaker for protection of field wiring conductors. l Based on 75°copper wire. All wiring must conform to the National Electrical Code and all local codes. Maximum KW that can operate with the heat pump on is 10KW. Full heat available during emergency heat mode. n Maximum KW that can operate with the heat pump on is 9KW. Full heat available during emergency heat mode.
NOTE: The Maximum Overcurrent Protection (MOCP) value listed is the maximum value as per UL 1995 calculations for MOCP (branch-circuit conductor sizes in this chart are based on this MOCP). The actual factory-installed overcurrent protective device (circuit breaker) in this model may be lower than the maximum UL 1995 allowable MOCP value, but still above the UL 1995 minimum calculated value or Minimum Circuit Ampacity (MCA) listed.
IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses and conductor wires in accordance with the National Electrical Code and all local codes.

Manual 2100-541E

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23 of 27

TABLE 6B

Electrical Specifications — T**H Series Dehumidification

Single Circuit

Multiple Circuit

MODEL

No.

Rated Volts, Field HZ & Phase Power
Circuits

Minimum Circuit
Ampacity

T42H1DA00, DA0Z

1

31

DA05

1

57

DA08 230/208-60-1 1 or 2

73

DA10

1 or 2

83

DA15

1 or 2

86

T42H1DB00, DB0Z

1

26

DB06 DB09

230/208-60-3

1 1

44 53

n DB15

1

53

T42H1DC0Z

1

13

DC06 DC09

460-60-3

1 1

22 26

n DC15

1

27

T48H1DA00, DA0Z

1

37

DA05

1 or 2

63

DA08 230/208-60-1 1 or 2

79

DA10

1 or 2

89

DA15

1 or 2

89

T48H1DB00, DB0Z

1

27

DB06 DB09

230/208-60-3

1 1

45 54

n DB15

1

55

T48H1DC0Z

1

15

DC06 DC09

460-60-3

1 1

24 28

n DC15

1

29

Maximum External
Fuse or Ckt. Brkr.
40 60 80 90 90 35 50 60 60 15 25 30 30 50 70 90 100 100 40 50 60 60 20 25 30 30

l Field Power Wire Size
8 6 4 4 3 8 8 6 6 12 10 10 10 8 6 4 3 3 8 8 6 6 12 10 10 10

l Ground
Wire

Minimum Circuit
Ampacity

Maximum

l

External Fuse or Field Power Wire

Ckt. Breaker

Size

l Ground Wire Size

Ckt. A Ckt. B Ckt. C Ckt. A Ckt. B Ckt. C Ckt. A Ckt. B Ckt. C Ckt. A Ckt. B Ckt. C

10

10

8

31 42

40 45

88

10 10

8

31 52

40 60

86

10 10

8

34 52

40 60

86

10 10

10

10

10

10

12

10

10

10

10

8

37 26

50 30

8 10

10 10

8

37 42

50 50

88

10 10

8

37 52

50 60

86

10 10

8

37 52

50 60

86

10 10

10

10

10

10

12

10

10

10

These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electrical code (latest version), Article 310 for power conductor sizing. CAUTION: When more than one field power circuit is run through one conduit, the conductors must be derated. Pay special attention to note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three (3) current carrying conductors are in a raceway.
Maximum size of the time delay fuse or circuit breaker for protection of field wiring conductors. l Based on 75°copper wire. All wiring must conform to the National Electrical Code and all local codes. Maximum KW that can operate with the heat pump on is 10KW. Full heat available during emergency heat mode. n Maximum KW that can operate with the heat pump on is 9KW. Full heat available during emergency heat mode.
NOTE: The Maximum Overcurrent Protection (MOCP) value listed is the maximum value as per UL 1995 calculations for MOCP (branch-circuit conductor sizes in this chart are based on this MOCP). The actual factory-installed overcurrent protective device (circuit breaker) in this model may be lower than the maximum UL 1995 allowable MOCP value, but still above the UL 1995 minimum calculated value or Minimum Circuit Ampacity (MCA) listed.
IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses and conductor wires in accordance with the National Electrical Code and all local codes.

Manual 2100-541E Page 24 of 27

TABLE 7 T**H INDOOR BLOWER PERFORMANCE – CFM (0.00″ — 0.50″ H20)

Model

Rated ESP

T42H

.15

T48H

.20

Max. ESP
.50 .50

Blower Only Except for
CRVMP Vent Options
1250
1550

l Blower Only
for CRVMP Vent Options
825
825

Cooling & Heat Pump
1250
1550

Electric
Heat
1250 1550

NOTE: These units are equipped with a variable speed (ECM) indoor motor that automatically adjusts itself to maintain approximately the same rate of indoor airflow in both heating & cooling, dry & wet coil conditions and at both 230/208 or 460 volts.
Maximum ESP (inches WC) shown is with 2″ thick disposable filter. Blower only CFM is the total air being circulated during continuous fan mode. Airflow remains constant. l Blower only CFM reduces during continuous fan mode. Requires wiring modification; consult Wiring Diagram and unplug and leave
disconnected the insulated male/female connector connecting together the Gray & Orange wires located near the 24V terminal block
enclosure. CFM output on Cooling or Electric Heat.

Manual 2100-541E

Page

25 of 27

TROUBLESHOOTING ECMTM MOTORS

CAUTION:

Disconnect power from unit before removing or replacing connectors, or servicing motor. To avoid electric shock from the motor’s capacitors, disconnect power and wait at least 5 minutes before opening motor.

Symptom

Cause/Procedure

Mwhoetnorstraorctkins gslightly

· This is normal start-up for ECM

Motor won’t start · No movement
· Motor rocks, but won’t start Motor oscillates up & down while being tested off of blower Motor starts, but runs erratically · Varies up and down or intermittent
· “Hunts” or “puffs” at high CFM (speed)
· Stays at low CFM despite system call for cool or heat CFM
· Stays at high CFM
· Blower won’t shut off
Excessive noise · Air noise

· Check blower turns by hand · Check power at motor · Check low voltage (24 Vac R to C) at motor · Check low voltage connections (G, Y, W, R, C) at motor · Check for unseated pins in connectors on
motor harness · Test with a temporary jumper between R – G · Check motor for tight shaft · Perform motor/control replacement check · Perform Moisture Check
· Check for loose or compliant motor mount · Make sure blower wheel is tight on shaft · Perform motor/control replacement check
· It is normal for motor to oscillate with no load on shaft
· Check line voltage for variation or “sag” · Check low voltage connections
(G, Y, W, R, C) at motor, unseated pins in motor harness connectors · Check “Bk” for erratic CFM command (in variable-speed applications) · Check out system controls, Thermostat · Perform Moisture Check
· Does removing panel or filter reduce “puffing”? – Reduce restriction – Reduce max airflow
· Check low voltage (Thermostat) wires and connections · Verify fan is not in delay mode; wait until delay complete · “R” missing/not connected at motor · Perform motor/control replacement check
· “R” missing/not connected at motor · Is fan in delay mode? – wait until delay time complete · Perform motor/control replacement check
· Current leakage from controls into G, Y or W? Check for Triac switched thermostat or solidstate relay
· Determine if it’s air noise, cabinet, duct or motor noise; interview customer, if necessary
· High static creating high blower speed? – Is airflow set properly? – Does removing filter cause blower to slow down? Check filter – Use low-pressure drop filter – Check/correct duct restrictions

Symptom
· Noisy blower or cabinet
· “Hunts” or “puffs” at high CFM (speed)

Cause/Procedure
· Check for loose blower housing, panels, etc. · High static creating high blower speed? – Check for air whistling through seams in
ducts, cabinets or panels
– Check for cabinet/duct deformation
· Does removing panel or filter reduce “puffing”? – Reduce restriction – Reduce max. airflow

Evidence of Moisture · Motor failure or malfunction has occurred and moisture is present
· Evidence of moisture present inside air mover

· Replace motor and Perform Moisture Check · Perform Moisture Check

Do

Don’t

· Check out motor, controls, · Automatically assume the motor is bad.

wiring and connections

thoroughly before replacing

motor

· Orient connectors down so · Locate connectors above 7 and 4 o’clock

water can’t get in

positions

– Install “drip loops”

· Use authorized motor and · Replace one motor or control model # with

model #’s for replacement another (unless an authorized replacement)

· Keep static pressure to a · Use high pressure drop filters some have ½”

minimum:

H20 drop!

– Recommend high

· Use restricted returns

efficiency, low static filters – Recommend keeping filters

clean.

– Design ductwork for min.

static, max. comfort

– Look for and recommend

ductwork improvement,

where necessary

· Size the equipment wisely
· Check orientation before inserting motor connectors

· Oversize system, then compensate with low airflow
· Plug in power connector backwards · Force plugs

Moisture Check
· Connectors are oriented “down” (or as recommended by equipment manufacturer) · Arrange harness with “drip loop” under motor · Is condensate drain plugged? · Check for low airflow (too much latent capacity) · Check for undercharged condition · Check and plug leaks in return ducts, cabinet

Comfort Check
· Check proper airflow settings · Low static pressure for lowest noise · Set low continuous-fan CFM · Use humidistat and 2-speed cooling units · Use zoning controls designed for ECM that regulate CFM · Thermostat in bad location?

Manual 2100-541E Page 26 of 27

TROUBLESHOOTING ECMTM MOTORS CONT’D.

Replacing ECM Control Module
To replace the control module for the GE variable-speed indoor blower motor you need to take the following steps:
1. You MUST have the correct replacement module. The controls are factory programmed for specific operating modes. Even though they look alike, different modules may have completely different functionality.
USING THE WRONG CONTROL MODULE VOIDS ALL PRODUCT WARRANTIES AND MAY PRODUCE UNEXPECTED RESULTS.
2. Begin by removing AC power from the furnace or air handler being serviced. DO NOT WORK ON THE MOTOR WITH AC POWER APPLIED. To avoid electric shock from the motor’s capacitors, disconnect power and wait at least 5 minutes before opening motor.
3. It is usually not necessary to remove the motor from the blower assembly. However, it is recommended that the whole blower assembly, with the motor, be removed from the furnace/air handler. (Follow the manufacturer’s procedures). Unplug the two cable connectors to the motor. There are latches on each connector. DO NOT PULL ON THE WIRES. The plugs remove easily when properly released.
4. Locate the two standard ¼” hex head bolts at the rear of the control housing (at the back end of the control opposite the shaft end). Refer to Figure 14. Remove these two bolts from the motor and control assembly while holding the motor in a way that will prevent the motor or control from falling when the bolts are removed. If an ECM2.0 control is being replaced (recognized by an aluminum casting rather that a deep-drawn black steel can housing the electronics), remove only the hex-head bolts. DO NOT REMOVE THE TORX-HEAD SCREWS.
5. The control module is now free of mechanical attachment to the motor endshield but is still connected by a plug and three wires inside the control. Carefully rotate the control to gain access to the plug at the control end of the wires. With thumb and forefinger, reach the latch holding the plug to the control and release it by squeezing the latch tab and the opposite side of the connector plug and gently pulling the plug out of the connector socket in the control. DO NOT PULL ON THE WIRES. GRIP THE PLUG ONLY.
6. The control module is now completely detached from the motor. Verify with a standard ohmmeter that the resistance from each motor lead (in the motor plug just removed) to the motor shell is >100K ohms. Refer to Figure 15. (Measure to unpainted motor end plate.) If any motor lead fails this test, do not proceed to install the control module. THE MOTOR IS DEFECTIVE AND MUST BE REPLACED. Installing the new control module will cause it to fail also.
7. Verify that the replacement control is correct for your application. Refer to the manufacturer’s authorized replacement list. USING THE WRONG CONTROL WILL RESULT IN IMPROPER OR NO BLOWER OPERATION. Orient the control module so that the 3-wire motor plug can be inserted into the socket in the control. Carefully insert the plug and press it into the socket until it latches. A SLIGHT CLICK WILL BE HEARD WHEN PROPERLY INSERTED. Finish installing the replacement control per one of the three following paragraphs, 8a, 8b or 8c.
8a. IF REPLACING AN ECM 2.0 CONTROL (control in cast aluminum can with air vents on the back of the can) WITH AN ECM 2.3 CONTROL (control containing black potting for water protection in black deep-drawn steel case with no vents in the bottom of the can), locate the two through-bolts and plastic tab that are packed with the replacement control. Insert the plastic tab into the slot at the perimeter of the open end of the can so that the pin is located on the inside of the perimeter of the can. Rotate the can so that the tab inserts into the tab locator hole in the endshield of the motor. Using the two through-bolts provided with the replacement control, reattach the can to the motor.
THE TWO THROUGH-BOLTS PROVIDED WITH THE REPLACEMENT ECM 2.3 CONTROL ARE SHORTER THAN THE BOLTS ORIGINALLY REMOVED FROM THE ECM 2.0 CONTROLAND MUST BE USED IF SECURE ATTACHMENT OF THE CONTROL TO THE MOTOR IS TO BE ACHIEVED. DO NOT OVERTIGHTEN THE BOLTS.

8b. IF REPLACING AN ECM 2.3 CONTROL WITH AN ECM 2.3 CONTROL, the plastic tab and shorter through-bolts are not needed. The control can be oriented in two positions 180° apart. MAKE SURE THE ORIENTATION YOU SELECT FOR REPLACING THE CONTROL ASSURES THE CONTROL’S CABLE CONNECTORS WILL BE LOCATED DOWNWARD IN THE APPLICATION SO THAT WATER CANNOT RUN DOWN THE CABLES AND INTO THE CONTROL. Simply orient the new control to the motor’s endshield, insert bolts, and tighten. DO NOT OVERTIGHTEN THE BOLTS.
8c. IF REPLACING AN ECM 2.0 CONTROL WITH AN ECM 2.0 CONTROL (It is recommended that ECM 2.3 controls be used for all replacements), the new control must be attached to the motor using through bolts identical to those removed with the original control. DO NOT OVERTIGHTEN THE BOLTS.
9. Reinstall the blower/motor assembly into the HVAC equipment. Follow the manufacturer’s suggested procedures.
10. Plug the 16-pin control plug into the motor. The plug is keyed. Make sure the connector is properly seated and latched.
11. Plug the 5-pin power connector into the motor. Even though the plug is keyed, OBSERVE THE PROPER ORIENTATION. DO NOT FORCE THE CONNECTOR. It plugs in very easily when properly oriented. REVERSING THIS PLUG WILL CAUSE IMMEDIATE FAILURE OF THE CONTROL MODULE.
12. Final installation check. Make sure the motor is installed as follows: a. Unit is as far INTO the blower housing as possible. b. Belly bands are not on the control module or covering vent holes. c. Motor connectors should be oriented between the 4 o’clock and 8 o’clock positions when the blower is positioned in its final location and orientation. d. Add a drip loop to the cables so that water cannot enter the motor by draining down the cables. Refer to Figure 16.
The installation is now complete. Reapply the AC power to the HVAC equipment and verify that the new motor control module is working properly. Follow the manufacturer’s procedures for disposition of the old control module.

FFigiguurree23144 Control Disassembly

Only remove

From Motor

Hex Head Bolts Push until

Latch Seats Over Ramp

Circuit

Board

FFiigguurree 4125 Winding Test
Motor Connector (3-pin)

ECM 2.0

Motor

Note: Use the shorter bolts and alignment pin supplied when replacing an ECM 2.0 control.
ECM 2.3/2.5

Motor Connector (3-pin)
Control Connector (16-pin) Power Connector (5-pin)
Hex-head Screws

Motor OK when R > 100k ohm

FFigiguurree1256 Drip Loop

Back of Control

Connector Orientation Between 4 and 8 o’clock

Drip Loop

Manual 2100-541E

Page

27 of 27

INSTALLATION

TABLE 1
Diagram to Use With Unit and Vents

LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase equipment dual primary voltage transformers. All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240V and 208V taps are:

TABLE 2
Operating Voltage Range

NOTE: The voltage should be measured at the field power connection point in the unit and while the unit is operating at full load (maximum amperage operating condition).
An 18 gauge copper, color-coded thermostat cable is recommended. The connection points are shown in Table 2.
Low Voltage Connection 
These units use a grounded 24-volt AC low voltage circuit.
The “R” terminal is the hot terminal and the “C” terminal is grounded.
“G” terminal is the fan input.
“Y” terminal is the compressor input Stage 1.
“B” terminal is the reversing valve input. The reversing valve must be energized for heating mode.
“R” terminal is the 24 VAC hot.
“RT” terminal is the 24 VAC hot from the transformer (used with “R” for fire/smoke shutdown).
“C” terminal is the 24 VAC grounded.
“Y1” terminal is the compressor input Stage 2.
“L” terminal is compressor lockout output. This terminal is activated on a high or low-pressure trip by the electronic heat pump control. This is a 24 VAC output.
“W2” terminal is second stage heat (if equipped).
“O1” terminal is the ventilation input. This terminal energizes any factory-installed ventilation option.
“E” terminal is the emergency heat input. This
terminal energizes the emergency heat relay.
“W3” terminal is the dehumidification input. This terminal energizes the compressor, blower, and threeway valve. This applies only to models equipped for dehumidification
sequence.

LOW VOLTAGE CONNECTIONS FOR DDC CONTROL

TABLE 3
Wall Thermostat

TABLE 4
Humidity Controls

TABLE 5
CO2 controller

TABLE 6
Thermostat Wire Size

FIGURE 1

Low Voltage Wiring Diagram:
Heat Pump With Optional Electric Heat
No Economizer or Ventilation Packages

1. Factory-installed jumper (on applicable models).
   Remove jumper and connect to N.C fire alarm circuit if emergency shutdown required.

FIGURE 2

Low Voltage Wiring Diagram:
Heat Pump With Optional MFAD, CRV & ERV
Ventilation Packaging With Programmable Thermostat

1. Factory Jumper Installed
2. Do not connect “A” from tstat #8403-060
   if an optional CO controller is used.
3. Factory-installed jumper (on applicable models).
   Remove jumper and connect to N.C fire alarm
   circuit if the emergency shutdown is required.

FIGURE 3

Low Voltage Wiring Diagram:
Heat Pump With Optional Economizer

1. Factory-installed jumper (on applicable models).
2. Remove jumper and connect to N.C fire alarm circuit if the emergency shutdown is required.
   Factory Jumper Installed.
3. Must be configured for economizer with YO/D output to be active as first stage cooling.
4. These wires are used in special control applications only.

FIGURE 4

Low Voltage Wiring Diagram:
Heat Pump With Dehumidification Sequence and No Ventilation Package
Using Thermostat #8403-060 Combination Temperature & Humidity Controller

1. Must be configured for “no economizer” to make YO/D output active for humidity control.
2. Factory-installed jumper (on applicable models).
   Remove jumper and connect to N.C fire alarm
   circuit if emergency shutdown required.

FIGURE 5

Low Voltage Wiring Diagram:
Heat Pump With Dehumidification Sequence & Optional MFAD, CRV & ERV Ventilation
Packaging Using Electronic Thermostat With Combination Temperature & Humidity Control
Packaging using Electronic Thermostat with Combination Temperature and Humidity Control with Optional CO2 Controller 

1. Factory Jumper Installed
2. Must be configured for “no economizer” to make YO/D output active for humidity control.
3. Factory-installed jumper (on applicable models).
   Remove jumper and connect to N.C fire alarm circuit if the emergency shutdown is required.

FIGURE 6

Low Voltage Wiring Diagram:
Dehumidification Heat Pump With Optional Economizer

1. Factory Jumper Installed.
2. Must be configured for economizer with YO/D output to be active as first stage cooling.
3. Factory-installed jumper (on applicable models).
4. These wires are used in special control applications only.
5. Remove jumper and connect to N.C fire alarm circuit if emergency shutdown required.

FIGURE 7

Low Voltage Wiring Diagram:
2 Stage Heat Pump With Optional Electric Heat
With ECONWM* Style Economizer

MIS-2982 C

1. Must be energized to enable minimum position. NOTE: Economizer Control Default Setting is 10V (100%). Depending upon application may require setting to lower value.
2. Must be configured for heat pump and economizer to enable YO/D output to be active as 1st-stage cooling
3. Factory Jumper Installed.
4. Factory-installed jumper (on applicable models).
   Remove jumper and connect to N.C fire alarm circuit if the emergency shutdown is required.

FIGURE 8

Low Voltage Wiring Diagram:
2 Stage Heat Pump With Dehumidification & Optional Electric Heat
With ECONWM* Style EconomizerMIS-2999 A

1. Must be energized to enable minimum position. NOTE: Economizer Control Default Setting is 10V (100%). Depending upon application may require setting to lower value.
2. Must be configured for the heat pump to enable YO/D output to be active dehumidification output
3. Factory Jumper Installed.
4. Factory-installed jumper (on applicable models).
   Remove jumper and connect to N.C fire alarm circuit if emergency shutdown required.

FIGURE 9

Low Voltage Wiring Diagram:
2 Stage Heat Pump With CHCRV-5 or CRVMWH-3
Vent Option Package With Programmable Thermostat
With Optional On/Off CO2 Controller

1. Factory Jumper Installed
2. Do not connect “A” from tstat #8403-060 if an optional CO2 controller is used.
3. Wire only needed for dehumidification units
4. Must be configured to programmable and fan set to programmed for the “A” output to function during scheduled occupied periods
5. Factory-installed jumper (on applicable models).
   Remove jumper and connect to N.C fire alarm circuit if the emergency shutdown is required.

FIGURE 10

Low Voltage Wiring Diagram:
2 Stage Heat Pump With CHCRV-5 or CRVMWH-3
Vent Option Package With Programmable Thermostat
With Optional Modulating CO2 ControllerMIS-3334 A

1. Factory Jumper Installed
2. Wire only needed for dehumidification units set to program for the “A” output to function  Must be configured to programmable and fan during scheduled occupied periods
3. Factory-installed jumper (on applicable models).
4. Remove jumper and connect to N.C fire alarm circuit if the emergency shutdown is required.

REPLACEMENT PARTS MANUAL
WALL-MOUNTED
PACKAGED AIR CONDITIONER

Models:

General Notes

•  Revised and/or additional pages may be issued from time to time.
• A complete and current manual consists of pages shown in the following contents section.

Important

• Contact the installing and/or local Bard distributor for all parts requirements. Make sure you have the complete model and serial number available from the unit rating plates.

Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com

Manual: 2110-1449D
Supersedes: 2110-1449C
Date: 4-14-20

CABINET COMPONENTS

SEXP-907

CABINET COMPONENTS – STANDARD & DEHUMIDIFICATION

FUNCTIONAL COMPONENTS

FUNCTIONAL COMPONENTS – STANDARD

NS – Not Shown

1. Used with stainless steel cabinet option
2. Optional on these models

FUNCTIONAL COMPONENTS – DEHUMIDIFICATION

NS – Not Shown

1. Used with stainless steel cabinet option
2. Optional on these models

EEV CONTROLLER ASSEMBLY

CONTROL PANEL

NS = Not Shown

• Circuit breakers listed are for units without electric heat, “0Z” models. See heater replacement parts manual for units with electric heat.

SEXP-908

CONTROL PANEL – DEHUMIDIFICATION

NS = Not Shown

• Circuit breakers listed are for units without electric heat, “0Z” models. See heater replacement parts manual for units with electric heat.

BLOWER ASSEMBLY

Bard Wall-Mount Heater Package

Models:

• EHW24A-A08
• EHW30A-B06
• EHW2TA-A10
• EHW2TA-A10L
• EHW2TA-B06
• EHW2TA-B06L
• EHW3TA-A05
• EHW3TA-A05L
• EHW3TA-A08
• EHW3TA-A08L
• EHW3TA-A10
• EHW3TA-A10L
• EHW3TA-B06
• EHW3TA-B09
• EHW3TA-B09L
• EHW3TA-B15
• EHW3TA-B15L
• EHW1TAB-A05
• EHW1TAB-A05L
• EHW1TAB-A08
• EHW1TAB-A08L
• EHW2TAB-A05
• EHW2TAB-A05L
• EHW2TAB-A08
• EHW2TAB-A08L
• EHWH24B-C06
• EHWH24B-C06L
• EHW3TA-A15
• EHW3TA-A15L
• EHW3TA-C06
• EHW3TA-C09
• EHW3TA-C09L
• EHW3TA-C12
• EHW3TA-C15
• EHW3TA-C15L
• EHW3TAB-A15
• EHW3TAB-A15L
• EHW3TABDB09
• EHW3TAB-C15
• EHW3TAB-C15L
• EHW3TAB-A05
• EHW3TAB-A10
• EHW3TAB-A10L
• EHW3TAB-B09
• EHW3TAB-B09L
• EHW3TAB-B15
• EHW3TAB-B15L
• EHWA03-E12C

General Notes

• Revised and/or additional pages may be issued from time to time.
• A complete and current manual consists of pages shown in the following contents section.
• Contact the installing and/or local Bard distributor for all parts requirements. Make sure to have the complete model and serial number available from the unit rating plates.

FUNCTIONAL COMPONENTS