Bard Wall Mounted Package Heat Pump Installation Guide

Installation Guide for Bard models including: Wall Mounted Package Heat Pump, W18HB-A, W24HB-A, W24HB-B, W24HB-C, W30HB-A, W30HB-B, W30HB-C, W36HB-A, W36HB-B, W36HB-C, W24HBDA, W24HBDB, W24HBDC, W30HBDA, W30HBDB, W30HBDC, W36HBDA, W36HBDB, W36HBDC

2100-703(J) (2021 05)

W18HB-A, W24HB-A, W24HB-B, W24HB-C, W30HB-A, W30HB-B, W30HB-C, W36HB-A, W36HB-B, W36HB-C, W24HBDA, W24HBDB, W24HBDC, W30HBDA, W30HBDB, W30HBDC, W36HBDA, W36HBDB, W36HBDC

2100-703(J) (2021 05)

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.

INSTALLATION INSTRUCTIONS

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2100-703(J)

INSTALLATION INSTRUCTIONS

Wall Mounted Package Heat Pump

W18HB-A

Models:
W24HB-A W24HB-B W24HB-C
W30HB-A W30HB-B W30HB-C
W36HB-A W36HB-B W36HB-C

W24HBDA W24HBDB W24HBDC
W30HBDA W30HBDB W30HBDC
W36HBDA W36HBDB W36HBDC

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

Manual: 2100-703J

Supersedes: 2100-703I

Date:

5-14-21

Page

1 of 42

CONTENTS

Getting Other Information and Publications .... 3 Wall Mount General Information ......................... 4
Heat Pump Wall Mount Model Nomenclature .......... 4 Shipping Damage ................................................. 4 General ............................................................... 4 Duct Work ........................................................... 4 Filters ................................................................. 5 Fresh Air Intake ................................................... 5
Installation ............................................................... 6 Basic Installation Design and Application Planning.. 6 Wall Construction ............................................. 6 Outdoor Area Inspection.................................... 6 Condensate Water Drainage ............................... 6 Indoor Ducted and Non-Ducted Applications........... 6 Indoor Supply Airflow........................................ 6 Indoor Return Airflow ........................................ 7 Ducted Applications ......................................... 7 Free Blow Applications...................................... 7 Thermostat or Indoor Temperature Sensor Placement ....................................................... 7 Unit Installation ................................................... 8 Materials/Tool List ............................................ 8 Wall Preparation............................................... 8 Wall Mount Installation to Wall Surface .............. 8 Wiring Main Power........................................... 15 Wiring Low Voltage........................................... 15 Low Voltage Connections ................................. 15 Unit Shutdown Feature ................................... 15 Balanced ClimateTM Feature............................. 15 Dehumidification Feature ................................ 16 Ventilation Features ........................................ 16 Low Ambient Control (LAC) ............................. 16 Outdoor Temperature Switch and Freeze Protection Thermostat ................................. 16 Alarm Relay Feature ....................................... 16 Dirty Filter Switch Indicator (DFS).................... 16
Start Up ................................................................... 20 General ......................................................... 20 Topping Off System Charge................................. 20 Safety Practices ................................................ 20 Important Installer Note ..................................... 20 High and Low Pressure Switch ............................ 21 Three Phase Scroll Compressor Start Up Information....................................................... 21 Phase Monitor ................................................... 21 Condenser Fan Operation ................................... 21 Sequence of Operation....................................... 21 Cooling ......................................................... 21 Heating ......................................................... 21 Dehumidification and Electronic Expansion Valve (EEV) .................................................... 21 Balanced Climate Mode .................................. 21 Defrost Cycle..................................................... 22 Low Pressure Switch Bypass Operation ............. 22 High Pressure Switch Operation ....................... 23 Vent Connection Plug.......................................... 23

Pressure Service Ports ........................................ 23 Service Hints ..................................................... 23
Service ..................................................................... 25 Solid State Heat Pump Control Troubleshooting Procedure ......................................................... 25 Checking Temperature Sensor Outside Unit Circuit........................................................ 26 Troubleshooting Nidec SelecTech Series ECM Motors............................................................... 27 If the Motor Is Running................................... 27 If the Motor Is Not Running............................. 27 Model SelecTech Communication Diagnostics ... 28 Fan Blade Setting Dimensions ............................. 29 Removal of Fan Shroud....................................... 29 R-410A Refrigerant Charge ................................. 29 Setting Unit Airflow ............................................ 33 Blower Speeds ............................................... 33 Speed Tap 1 Vent/Blower Only .................. 34 Speed Tap 2 Balanced Climate ................. 34 Speed Tap 3 Default LO Cooling & Heating ............................... 34 Speed Tap 4 Optional MED Cooling & Heating ............................... 34 Speed Tap 5 Optional HI Cooling & Heating ............................... 34 Dirty Filter Switch ............................................. 35 Dirty Filter Switch Adjustment ......................... 35
TABLES
Table 1 Clearance Required for Service Access and Adequate Condenser Airflow............. 9
Table 2 Minimum Clearances Required to Combustible Materials ........................... 9
Table 3 Low Voltage Connections...................... 16 Table 4 Wall Thermostats ................................ 17 Table 5 Humidity Controls ............................... 17 Table 6 CO2 Controller..................................... 17 Table 7 Thermostat Wire Size........................... 17 Table 8 Troubleshooting .................................. 25 Table 9 Temperature vs. Resistance.................. 26 Table 10 Fan Blade Dimension .......................... 29 Table 11A Cooling Pressure ................................. 30 Table 11B Heating Pressure................................. 30 Table 12 Cooling Pressure Balanced Climate
Airflow ............................................... 31 Table 13 Electrical Specifications ...................... 32 Table 14 Recommended Airflow ......................... 33 Table 15 Blower Speeds for Unit Operational
Modes................................................ 34 Table 16 Indoor Blower Performance .................. 37 Table 17 Maximum ESP of Operation
Electric Heat Only .............................. 38 Table 18 Electric Heat ...................................... 38 Table 19 Optional Accessories ........................... 39 Table 20 Vent and Control Options ..................... 40

Manual 2100-703J Page 2 of 42

FIGURES
Figure 1 Fresh Air Damper .................................. 5 Figure 2 Unit Dimensions ................................... 9 Figure 3A Mounting Instructions W18H, W24H.. 10 Figure 3B Mounting Instructions W30H, W36H.. 11 Figure 4 Electric Heat Clearance ....................... 12 Figure 5 Wall Mounting Instructions .................. 13 Figure 6 Wall Mounting Instructions .................. 13 Figure 7 Common Wall Mounting Installations .... 14 Figure 8 Thermostat Connections ...................... 18 Figure 9 Thermostat Connections ...................... 19 Figure 10 Defrost Control Board .......................... 24 Figure 11 Motor Connections .............................. 27 Figure 12 Motor Connections .............................. 28 Figure 13 Fan Blade Setting ............................... 29 Figure 14 Speed Taps......................................... 33 Figure 15 Speed Taps......................................... 33 Figure 16 Dirty Filter Switch Location.................. 35 Figure 17 Adjusting Dirty Filter Switch................. 36

GRAPHS

Graph 1 Graph 2 Graph 3 Graph 4

W18HB FAD-NE2, 3 W/O Exhaust Ventilation Delivery ............................. 41 W24HB FAD-NE2, 3 W/O Exhaust Ventilation Delivery ............................. 41 W30HB FAD-NE2, 3 W/O Exhaust Ventilation Delivery ............................. 42 W36HB FAD-NE2, 3 W/O Exhaust Ventilation Delivery ............................. 42

GETTING OTHER INFORMATION AND PUBLICATIONS

These publications can help when installing the heat pump. They can usually be found at the local library or purchased directly from the publisher. Be sure to consult the 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 ANSI ASHRAE NFPA

Air Conditioning Contractors of America 1712 New Hampshire Ave. N.W. Washington, DC 20009 Telephone: (202) 483-9370 Fax: (202) 234-4721
American National Standards Institute 11 West Street, 13th Floor New York, NY 10036 Telephone: (212) 642-4900 Fax: (212) 302-1286
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
National Fire Protection Association Batterymarch Park P.O. Box 9101 Quincy, MA 02269-9901 Telephone: (800) 344-3555 Fax: (617) 984-7057

Manual 2100-703J

Page

3 of 42

WALL MOUNT GENERAL INFORMATION

Heat Pump Wall Mount Model Nomenclature

W 30 H B A 10

X X

X XX

MODEL NUMBER

REVISIONS

CONTROL MODULES (See Spec. Sheet S3592)

CAPACITY 18 - 1½ Ton 24 - 2 Ton 30 - 2½ Ton 36 - 3 Ton

H - Heat Pump
SPECIALTY PRODUCTS (Non-Standard)

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

VENTILATION OPTIONS

(See Spec. Sheet S3592)

X - Barometric Fresh Air Damper (Standard)

A - Fresh Air Damper w/Exhaust

B - Blank-Off Plate

D - Economizer, 0-10V no controls

M - Commercial Ventilator, ON/OFF

R - Energy Recovery Ventilator

S - Partial Flow Economizer, JADE

V - Commercial Ventilator,

0-10V variable

FILTER OPTIONS

Y - Full Flow Economizer, DB

X - 1" MERV2 Disposable Filter

COIL OPTIONS

COLOR & CABINET FINISH X - Beige Baked
Enamel Finish 1 - White Baked
Enamel Finish 4 - Buckeye Gray
Baked Enamel Finish

X - Standard 1 - Phenolic Coated Evaporator 2 - Phenolic Coated Condenser 3 - Phenolic Coated Evaporator
and Condenser 4 - Coated Coils and Condenser
Section 5 - Coated Coils, Inside and
Outside of Unit

5 - Desert Brown Baked Enamel Finish

PLACEHOLDER X - Future Use

8 - Dark Bronze Baked

Enamel Finish

S - Stainless Steel

A - Aluminum

Z - Full Flow Economizer, JADE, W - 1" MERV2 Permanent Filter

DB and WB

P - 2" MERV8 Disposable Filter

M - 2" MERV11 Disposable Filter B - NPBI TECH + 2" MERV13 Disposable Filter

N - 2" MERV13 Disposable Filter A - UV-C + 2" MERV13 Disposable Filter

Insert "D" for dehumidification with hot gas reheat. Reference latest revision of Form 7960-828 for complete details. For 0 KW and circuit breakers (230/208 volt) or toggle disconnect (460V) applications, insert 0Z in the KW field of the model number.

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.
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.

Manual 2100-703J Page 4 of 42

Refer to the Maximum ESP of Operation table on page 38.
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 1" 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.
Models W18 and W24 are approved for 0" clearance to the supply duct. For models W30 and W36, a 1/4" clearance to combustible material for the first 3' of duct attached to the outlet air frame is required. See Ducted Applications on page 7 and Figures 3A and 3B (pages 10 and 11) and Figure 4 (page 12) 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".
Any grille that meets with 5/8" louver criteria may be used. It is recommended that Bard Return Air Grille Kit RG-2W through RG-3W or RFG-2W through RFG3W 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" 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. A 1" washable filter and 2" pleated filter are also available as optional accessories. The internal filter brackets are adjustable to accommodate the 2" filter by bending two 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).
Graphs found on pages 41 and 42 give approximate fresh air amounts based on the blade position stop location.
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.

FIGURE 1 Fresh Air Damper

BLADE IS LOCKED CLOSED FOR SHIPPING

MIS-938

Manual 2100-703J

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INSTALLATION

Basic Installation Design and Application Planning
Successful unit installations require proper planning and site inspection before installation begins. Before installing the wall mount unit, make sure that all service and airflow clearances are met and that the unit can meet all applicable code and regulation requirements. Provide an inspection of both the inside and outside of the structure by reviewing floorplans and/or visiting the installation site.
Wall Construction
The wall must be inspected to ensure that the weight of the unit can be supported. Be sure to review all applicable construction codes and regulations including seismic requirements. When inspecting wood frame walls, the wall construction must be strong and rigid enough to carry the weight of the unit without transmitting any unit vibration. It is important that the side unit wall mounting lags and optional bottom bracket are supported by structural members inside the wall cavity. Concrete block and brick walls must be thoroughly inspected to ensure that they are capable of carrying the weight of the installed unit. Metal buildings must contain structural components to support the unit weight. If heavily corrugated siding is present, it may need to be trimmed and flashed similar to a window to provide a flat, even surface to attach and seal the unit to the wall. Heavy gauge corrugations that would be present on shipping containers and blast-proof structures may require the installation of a metal plate over the corrugated area. It is important that the unit area is weatherized and sealed to avoid air and water infiltration into the area between the unit and the wall.
Outdoor Area Inspection
Inspect the outdoor area of the jobsite or review construction plans and locate the area where the wall mount is to be installed. The outdoor area must be free from obstructions including fences, bushes and walls that will hinder unit operation regarding outdoor condenser airflow and unit serviceability. Do not install units in enclosed areas that limit the amount of ambient temperature airflow. Warm air will exit the front condenser section of the unit, and outdoor ambient temperature air must be able to enter side intake condenser openings of the unit. Portable or modular building placement must be in a way that the wall mount units have a constant supply of outdoor air for proper unit operation. Make sure that the service panels of the unit are accessible. Inspect wall surfaces for obstructions that could hinder unit installation and servicing including outdoor electrical conduits, junction boxes, wall drains, vent hoods, windows, doors, overhangs and posts.
Manual 2100-703J Page 6 of 42

NOTE:

Before mounting the heat pump unit, consideration should be given to the condensate removal from the outdoor coil when in heating mode. The unit must be mounted high enough above grade to ensure that ice will not build up under the unit and come into contact with the base of the unit. If allowed, this could cause damage to the coil and other base components. Also, be sure there are no air obstructions to the sides or front of the unit, such as bushes or fences, that would inhibit condenser airflow.

Condensate Water Drainage

Review all codes and requirements for unit condensate drainage. A clear, flexible PVC drain hose (3/4" ID, 1" OD) extends from the drain pan in the upper section of the unit and extends down to the unit base. An opening is supplied towards the back of the unit base for the drain hose to pass through, and the hose extends 1" to 2" below the unit base. Water removed from the indoor air (condensate) will be expelled from the unit in large amounts during cooling operation through the hose. Units running in cooling operation in cold outdoor below freezing conditions can cause the condensate to freeze after leaving the drain hose. 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 throughout seasonal use.

Indoor Ducted and Non-Ducted Applications
Air distribution inside the structure being conditioned plays an important role in making sure the area is a consistent temperature. Improper air distribution can result in areas being cooler or warmer, electrical equipment not receiving sufficient airflow or occupancy discomfort felt inside an area. Thermostat or indoor temperature sensor placement inside the area being conditioned also plays an important role in indoor climate control.
Indoor Supply Airflow
Indoor installation areas must provide a non-restrictive path for the conditioned supply air to leave supply grilles and registers. Inspect the area to ensure that all indoor portions of the room or rooms will have access to supply air. Ductwork may be used to ensure proper air circulation and all provided ductwork guidelines and clearances must be followed. Non-ducted applications must use a supply louver grille installed over the supply opening inside the room. Be sure to adjust supply deflectors to properly disperse the conditioned supply air to all parts of the room. Avoid closing sections of the supply grilles which would cause unneeded supply duct pressurization.

Indoor Return Airflow
A non-restrictive path for room air returning to the center section of the unit must be provided inside the room. Avoid placing objects including furniture, electronics equipment, equipment racks and cabinets directly in front of the unit return grilles and registers. Bard recommends at least 2' between solid objects and return grilles or registers. Ductwork may be used to ensure proper air circulation and all provided ductwork guidelines and clearances must be followed. Nonducted applications must use a return louver grille installed over the return opening inside the room.
Ducted Applications
Field fabricated supply and return duct work may be installed inside the structure being conditioned. A short supply and/or return stub duct may be connected to the unit supply and return flanges before unit installation to help with duct connections inside the structure. Supply and return ducts 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 conserve energy, reduce heat conductivity, and prevent condensation or moisture damage. Refer to Maximum External Static Pressure (ESP) of Operation Table 17 on page 38. Design the duct work according to methods given by the Air Conditioning Contractors of America (ACCA). When duct work is installed in unheated spaces, it should be insulated with a minimum of 1" 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. Ducts through the walls must be insulated and all joints taped or sealed to prevent air or moisture from entering the wall cavity.
The unit itself is suitable for 0" clearance, but the supply air duct flange and the first 3' of supply air duct require a minimum of 1/4" clearance to combustible material for model series W30 and W36. However, it is generally recommended that a 1" clearance is used for ease of installation and maintaining the required clearance to combustible material. See Figures 3A and 3B on pages 10 and 11 for details on opening sizes.
! WARNI NG
Fire hazard.
Maintain minimum 1/4" clearance between the supply air duct and combustible materials in the first 3' of ducting.
Failure to do so could result in fire causing damage, injury or death.

Free Blow Applications
Some installations may not require extensive supply duct work throughout the structure and are referred to as free blow applications. A short field-fabricated supply duct must be used in the wall cavity to transition between the supply collar on the unit and the supply louver grille in the room. The duct must be properly insulated in order to conserve energy, reduce heat conductivity and prevent condensation or moisture damage. All joints must be taped or sealed to prevent air or moisture entering the wall cavity. Follow all clearances including distances to combustible materials and all instructions provided in this manual. A non-restrictive metallic supply air grille with deflectors is required for free blow applications. Contact the local Bard distributor or visit www.bardhvac.com for ordering information.
A metallic return air grille is required for non-ducted applications. The spacing between louvers on the grille shall not be larger than 5/8". It is recommended that a Bard Return Air Grille Kit be installed that is designed specifically for the wall mount product. Contact the local Bard distributor or visit www.bardhvac.com for ordering information. A field-supplied return grille that meets the 5/8" louver criteria and does not cause the unit to exceed the maximum specified external static pressure (ESP) may be used. If using a return air filter grille, filters must be of sufficient size to allow a maximum velocity of 400 fpm. Filter return air grilles do not filter air being brought into the structure through ventilation options including fresh air dampers, ventilators, economizers and energy recovery ventilators. Be sure to install the return grille with the louvers pointed downward towards the floor. This will help ensure return air is drawn upward from the floor and improve air circulation in the room.
NOTE: If no return air duct is used, applicable installation codes may limit this cabinet to installation only in a single story structure.
Thermostat or Indoor Temperature Sensor Placement
The location and installation of the thermostat or temperature sensor that monitors indoor temperature is very important regarding unit operation. Avoid placing the thermostat in an area exposed to direct sunlight or air from doorways leading outdoors. Use a piece of insulating material to close off conduit openings or holes in the wall surface for wire entry into the thermostat or temperature sensor. This will help avoid non-conditioned air from entering the thermostat and effecting temperature and/or humidity readings. As common practice, the thermostat or temperature sensor should measure the temperature of the air being returned to the unit, and not the conditioned air being supplied by the unit. Placing the thermostat or temperature sensor near a return air opening will normally result in optimal unit performance.

Manual 2100-703J

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Unit Installation
Make sure to have the proper tools at the work site that are needed for unit installation. The following steps are provided to ensure the unit is installed properly to the wall surface, and that the unit will provide years of service with minimal service requirements.
Materials/Tools List
Additional hardware and miscellaneous supplies are needed for installation. These items are field supplied and must be sourced before installation. This list also includes tools needed for installation.
· Appropriate safety gear including gloves and safety glasses
· 5/16" hex bit with drill driver
· Phillips head screwdriver
· Small straight (thermostat) screwdriver
· Tape measure
· Leveling device
· Two (2) tubes of caulk and caulk gun
· Utility knife
· Tools for cutting holes in the wall surface (if needed)
· Electrical components and wiring along with electrical tools
· Multimeter
· Wall fasteners for side flanges, bottom mounting bracket and top rain flashing.
· Duct tape and/or other duct sealing materials.
Wall Preparation
1. Two holes for the supply and return air openings must be cut through the wall as shown in Figures 3A and 3B on pages 10 and 11. Be sure the openings are square and level. Follow all clearances including distances to combustible materials and all instructions provided in this manual.
2. Review all electrical requirements provided in this manual and plan out electrical entrances into the building. Also plan electrical conduit routing and thermostat placement, if necessary.
3. Install necessary duct work and prepare the openings for unit installation.
4. Clean the exterior wall where the unit is to be installed and make sure it is able to provide a smooth, level, debris-free surface. Remove all construction debris from the supply, return and electrical hole cutting process.
Wall Mount Installation to Wall Surface
1. Remove packaging from unit and make sure unit is not damaged before installation. A top rain
Manual 2100-703J Page 8 of 42

flashing is supplied for field use and is mounted to the back of the unit for shipping. Remove rain flashing before locating the unit against wall. Top rain flashing is required to avoid water entering the area behind the unit that is against the wall. A bottom mounting bracket, attached to the skid for shipping, is provided for ease of installation but is not required. Review all requirements listed on unit labels and on serial plate located on the side of the unit.
2. Locate and mark bolt hole locations and bottom mounting bracket location. Install bottom mounting bracket with field-supplied fasteners to wall if it is to be used (optional). Bracket must be level and installed in the correct location to help support the unit during the installation process (see Figures 3A and 3B).
3. Position the wall mount unit close to the wall surface where it will be installed. Install rain flashing at the top of the unit facing the wall by hooking the hem bend into the rear bend of the unit top (see Figures 3A and 3B).
4. Apply a liberal amount of caulk on left and right cabinet side wall mount brackets and back of top rain flashing. Place unit back surface flush against wall. Unit must be level to ensure proper condensate drainage. Optional bottom bracket may be used to help support the unit.
5. Units are secured to the wall by using fieldsupplied fasteners along each side of the wall mount through the built-in wall mounting brackets. It is the responsibility of the installer to select the proper fastener to secure the unit to the wall based on wall construction and applicable building codes. Typical installations may include 5/16" fasteners with 7/8" diameter flat washers. Be sure unit is securely mounted and all weight-bearing fasteners are attached to the weight supporting structural members of the wall.
6. Apply a bead of caulk between the back of the unit top and the front surface of the top rain flashing (see Figures 3A and 3B).
7. Connect unit duct work from the inside of the building following all clearances and instructions provided. 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 use code approved duct tape or other sealing materials to seal the duct work to the unit.
8. On side-by-side installations, maintain a minimum of 20" 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.

TABLE 1 Clearance Required for Service Access and
Adequate Condenser Airflow

Model

Left Side

W18H

W24H W30H

15"

W36H

Right Side
20"

TABLE 2 Minimum Clearances Required
to Combustible Materials

Model
W18H W24H
W30H W36H

Supply Air Duct (1st 3') 0" 1/4"

Cabinet 0" 0"

1. Follow all national, state, and local codes and regulations regarding the installation of heating and cooling equipment regarding Single Packaged Vertical Units (SPVU) including electrical access clearances.
2. Field ventilation installation with the unit installed requires 40" on the left or right side of the unit.
3. Bard recommends a minimum of 10' between the unit front condenser air outlet and solid objects including fences, walls, bushes and other airflow obstructions.
4. Bard recommends a minimum of 15' between the condenser air outlets of two units that are facing each other.
5. Bard recommends a minimum clearance of 4" under the unit cabinet for condenser defrost drain age during heat pump operation.

FIGURE 2 Unit Dimensions

Width Depth (W) (D)

W18HB W24HB

33.300

17.125

W30HB W36HB

38.200

17.125

Height (H)
74.563
74.563

Supply Return A B C B E F G I J K L MNO P Q R S 7.88 19.88 11.88 19.88 35.00 10.88 29.75 20.56 30.75 32.06 33.25 31.00 2.63 34.13 26.06 10.55 4.19 12.00
7.88 27.88 13.88 27.88 40.00 10.88 29.75 17.93 30.75 32.75 33.25 31.00 2.75 39.13 26.75 9.14 4.19 12.00

T 9.00 9.00

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

Built In

Rain Hood

E O

4° Pitch

Heater

.44

Access

Panel

2.13

Electric Heat
C. Breaker/ Disconnect Access Panel

1.250

Side Wall

Mounting

Brackets

(Built In)

Supply Air Opening
B

R S

(Lockable)

Top Rain

Flashing

Hood for full flow

Shipping

ECON models only

Location

5.88

1 Filter Access Panel

Ventilation Air

Standard flush vent door for non- 3" ERV

Optional

C H Electrical

Return Air Opening

Entrances

Econ.

models

Hood for ERV

7.00

Condenser

Air Outlet

models only Low Voltage Electrical Entrance High Voltage

K
Cond. J Air Inlet

L
M P

Electrical

Entrance

Front View

Drain
Side View

Bottom Installation

Back View Bracket

MIS-3976 A

Manual 2100-703J

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Manual 2100-703J Page 10 of 42

FIGURE 3A W18H, W24H Mounting Instructions
SEAL WITH BEAD OF CAULKING ALONG ENTIRE LENGTH OF TOP.
TOP
WALL

RAIN FLASHING SUPPLIED
FOAM AIR SEAL
WALL STRUCTURE

1 2

12" 12"

1 16

20"

1 16

Supply Opening

1 2

12"

Return Opening

12"

20"

12"

7 8

3" 1"
4" Typ.

1 8

Typ.

Wall Opening and Hole Location View

HEATER ACCESS PANEL

SUPPLY AIR DUCT

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.
J**A UNIT SHOWN, J**L UNIT CONTROLS AND HEATER ACCESS IS ON OPPOSITE (LEFT) SIDE.

Right Side View

MIS-3157 A

11 of 42

Page

Manual 2100-703J

FIGURE 3B W30H, W36H Mounting Instructions

REQUIRED DIMENSIONS TO MAINTAIN

1/4" MIN. CLEARANCE FROM

28 3/8 8 3/8

COMBUSTIBLE MATERIALS

REQUIRED DIMENSIONS TO MAINTAIN RECOMMENDED 1" CLEARANCE FROM 29 7/8 9 7/8 COMBUSTIBLE MATERIALS

5 3/8 3 11/16 17 5/8

4 5/8 4 1/2 16 7/8

WALL

SEAL WITH BEAD OF CAULKING ALONG ENTIRE LENGTH OF TOP.
TOP

Supply Opening

12"

E 12"

12"

Return Opening

14"

12"

7 8

1 16

11 16

28"

7 8

1 8

Typ.

4" Typ.

7 8

11 16

Wall Opening and Hole Location View

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

RETURN AIR OPENING

Right Side View

MIS-3158 A

FIGURE 4 Electric Heat Clearance
W30H and W36H
SIDE SECTION VIEW OF SUPPLY AIR DUCT FOR WALL-MOUNTED UNIT SHOWING 1/4" CLEARANCE TO COMBUSTIBLE SURFACES.
! WARNI NG
Fire hazard. Maintain minimum 1/4" clearance between the supply air duct and combustible materials in the first 3' of ducting. Failure to do so could result in fire causing damage, injury or death.
Manual 2100-703J Page 12 of 42

FIGURE 5 Wall Mounting Instructions
SEE FIGURES 3A-B MOUNTING INSTRUCTIONS

FACTORY SUPPLIED RAIN FLASHING. MOUNT ON UNIT
BEFORE INSTALLATION

WALL STRUCTURE

SUPPLY AIR OPENING

SUPPLY AIR DUCT

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

FIGURE 6 Wall Mounting Instructions

ATTACH TO TOP PLATE OF WALL
1.000" CLEARANCE ALL AROUND DUCT
IF REQUIRED
INTERIOR FINISHED WALL OVER FRAME
1.000" CLEARANCE ALL AROUND DUCT
IF REQUIRED
EXTERIOR FINISH WALL OVER FRAME

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

ATTACH TO BOTTOM PLATE OF WALL

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

1.000

SUPPLY DUCT OPENING

RETURN DUCT OPENING

K 2 x 6 CL

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

Manual 2100-703J

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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

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 2100-703J Page 14 of 42

Wiring Main Power
! WARNI NG
Electrical shock hazard.
Do not operate this equipment without an earth ground attached and always disconnect the remote electric power supplies before servicing. Electrical shock can result in serious injury or death.
Refer to the unit rating plate for wire sizing information and maximum fuse or 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 fuse or 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 page 21 for important information on three phase scroll compressor start ups.
See Table 13 on page 32 for electrical specifications.
Wiring Low Voltage
All 230/208V 1 phase and 3 phase equipment have 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

RANGE

240

253 216

208

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 low voltage wiring, an 18 gauge copper, color-coded cable is recommended. See Table 7 on page 17 for more information.

Low Voltage Connections

These units use a 24-volt AC low voltage circuit.

C terminal is 24VAC common and is grounded.

G terminal is the indoor blower input.

Y1 terminal is the 1st Stage input for cooling.

Y2 terminal is the 2nd Stage compressor input for cooling (if equipped with an economizer).

B/W1 terminal is the reversing valve input. The reversing valve must be energized for heating mode.

W2 terminal is the 1st stage electric heat (if equipped).

W3 terminal is the 2nd stage of electric heat or emergency heat input (if equipped). Two stages of electric heat are not available on units with dehumidification.

A terminal is the ventilation input. This terminal energizes any factory-installed ventilation option and indoor blower.

D terminal is the dehumidification input. If installed, this terminal energizes any factory-installed dehumidification option.

L terminal is 24 volt alarm active output.

For units equipped with an alarm relay:

1 terminal is the normally closed contact on the relay. 2 terminal is the normally open contact on the relay. 3 terminal is the common contact on the relay.

DDC Connections

11 terminal is filter switch, common contact on auxiliary terminal strip (F Control option only)

12 terminal is filter switch, normally open contact on auxiliary terminal strip (F Control option only)

Unit Shutdown Feature (Standard on All Models)

The RT terminal is the 24VAC transformer output, and the R terminal is the 24VAC hot terminal for the operation of the equipment. RT and R are connected with a brass jumper bar which can be removed and RT and R connected to an external NC (normally closed) contact such as a fire/smoke detector that will cause shutdown of the equipment upon activation.

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Balanced ClimateTM Feature (Standard on All Models)

All units are equipped with the capability of running in Balanced Climate mode. This mode is designed to enhance the comfort level by reducing the indoor airflow amount and extending the run time to help extract more humidity during cooling operation. In heating mode, the reduced airflow provides a warmer supply air temperature creating more comfortable heat. The Y1 terminal is the 24VAC input for Balanced Climate compressor cooling operation. The Y2 terminal is the 24VAC input for compressor cooling standard operation. Y1 and Y2 are connected with a brass jumper bar which can be removed to enable Balanced Climate mode. Units with an economizer will not have the brass jumper installed. Refer to vent manuals for instructions on how Balanced Climate works with each vent.

NOTE:

Units with mechanical dehumidification require an additional connection to be made when enabling Balanced Climate. Refer to dehumidification supplemental instructions for this step.

To operate in Balanced Climate mode, a 2-stage cooling thermostat is required. The lower indoor airflow operation is overridden by utilizing a 2-stage thermostat. If the call for cooling is not satisfied within a given time frame or temperature differential (specified by the thermostat), the thermostat will send a signal to Y2 which then increases the blower speed back to the selected speed. See pages 33 34 for blower speed selection options.

Refer to page 21 for additional Balanced Climate requirements and limitations.

Dehumidification Feature (Optional)

The D terminal is the 24VAC input for dehumidification operation on dehumidification hot gas reheat equipped units. When 24VAC is applied to the D terminal, a 3-way valve solenoid is energized. The reheat coil located behind the evaporator coil is then active to reheat the supply air during cooling mode. This allows humidity to be removed from the air entering the unit without a large amount of sensible cooling capacity. During dehumidification, the indoor blower speed is reduced to help with the humidity removal. A humidity sensing thermostat or humidistat is required to control dehumidification operation.

Ventilation Features (Optional)

See ventilation instructions provided with unit for low voltage wiring.

Low Ambient Control (LAC)
The low ambient control is a pressure switch that is attached to the liquid line of the system and monitors high side pressure. Operation of the LAC occurs as outdoor temperatures drop below 60°F. On/Off and modulating controls are used which operate based on pressure changes caused by outdoor temperature

Manual 2100-703J Page 16 of 42

changes. On/Off LAC operation cycles the condenser fan on/off to maintain desired liquid pressure while modulating LAC operation is factory adjusted and slows the condenser fan speed (rpm).
Outdoor Temperature Switch and Freeze Protection Thermostat
An outdoor temperature switch and an evaporator freeze protection thermostat is supplied with all units that have a low ambient control. The outdoor switch disables Balanced Climate mode (if enabled) when the temperature drops below 50°F. This prevents potential evaporator coil freeze up issues. For units with mechanical dehumidification, this switch must remain disconnected when Balanced Climate mode is not being used. Refer to unit wiring diagram. The freeze thermostat cuts out compressor operation if the evaporator begins to freeze up.
Alarm Relay Feature (Controls Option)
The alarm relay provides a set of NO (normally open) and NC (normally closed) pilot duty contacts that operate when the compressor control module locks out compressor operation because of a high or low system refrigerant pressure event.
Dirty Filter Switch Indicator (DFS)
The switch is adjustable and measures pressure drop across the unit filter surface. When pressure drop is higher than the switch setting, NO contacts are provided to indicate the filter needs to be serviced. Refer to page 35 for instructions on making switch adjustments.
TABLE 3 Low Voltage Connections

Standard Units

Units w/ Economizers

Fan Only
1st Stage Cooling Mode/ Balanced Climate

Energize G Energize Y1, G

2nd Stage Cooling Mode

Energize Y2 to override Balanced Climate mode when Y1-Y2 jumper is removed

Energize Y1, Y2, G

1st Stage Heating Energize Y1, B/W1 Energize Y1, B/W1

2nd Stage Heating Energize Y1, B/W1, Energize Y1, B/W1,

(if employed)

Ventilation

Energize A

Dehumidification (if employed)

Energize D

Emergency Heat

Energize G, W2, W3

TABLE 4 Wall Thermostats

Part Number

Predominate Features

8403-060 (1120-445) CS9B-THOA
CS9B-THOCA
CS9BE-THOA
CS9BE-THOCA
8403-095 (T4 Pro)
8403-090 (T6 Pro)
8403-092 (T6 Pro Wi-Fi)

3 stage Cool; 3 stage Heat; Electronic Programmable/Non-Programmable; HP or Conventional; Auto or Manual changeover; Dehumidification Output
3 stage Cool, 3 stage Heat; Programmable/Non-Programmable; HP or Conventional; Auto or Manual Changeover; Humidity Sensor w/ dehumidification; Motion Sensor w/Intelligent Learning Control; BACnet-compatible
3 stage Cool, 3 stage Heat; Programmable/Non-Programmable; HP or Conventional; Auto or Manual Changeover; Humidity Sensor w/ dehumidification; CO2 Sensor; Motion Sensor w/Intelligent Learning Control; BACnet-compatible
3 stage Cool, 3 stage Heat; Programmable/Non-Programmable; HP or Conventional; Auto or Manual Changeover; Humidity Sensor w/ dehumidification; Motion Sensor w/Intelligent Learning Control; BACnet-compatible; Ethernetcompatible
3 stage Cool, 3 stage Heat; Programmable/Non-Programmable; HP or Conventional; Auto or Manual Changeover; Humidity Sensor w/dehumidification; CO2 Sensor; Motion Sensor w/Intelligent Learning Control; BACnetcompatible; Ethernet-compatible
1 stage Cool, 2 stage Heat Heat Pump; 1 stage Cool, 1 stage Heat Conventional; Programmable/NonProgrammable Electronic; Auto or Manual changeover
2 stage Cool, 3 stage Heat Heat Pump; 2 stage Cool, 2 stage Heat Conventional; Programmable/NonProgrammable Electronic; Auto or Manual changeover
2 stage Cool, 3 stage Heat Heat Pump; 2 stage Cool, 2 stage Heat Conventional; Programmable/NonProgrammable Electronic; Auto or Manual changeover; Wi-Fi

TABLE 5 Humidity Controls

Part Number

Predominate Features

8403-038

SPDT switching, pilot duty 50VA @ 24V;

(H600A1014) Humidity range 20-80% RH

8403-047 (H200-10-21-10)

Electronic dehumidistat SPST closeson-rise; Humidity range 10-90% with adjustable stops

TABLE 7 Thermostat Wire Size

Transformer VA

FLA

2.3

Wire Gauge
18 gauge 16 gauge 14 gauge 12 gauge

Maximum Distance In Feet
60 100 160 250

TABLE 6 CO2 Controllers

Part Number

Predominate Features

8403-056 8403-096

CO2 ventilation control with digital display. Normally Open SPST (Default: Close at 800ppm)
Normally Open SPST relay closes-on-rise 24V dual wave length sensor. Default setting 950ppm, adjustable to 0-2000ppm Default off setting 1000ppm, adjustable to 0-200 ppm can be calibrated

Manual 2100-703J

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FIGURE 8 Thermostat Connections

SC SC SC Completestat Model #CS9B-THOA or Model #CS9BE-THOA
24V COM G Y1 Y2 O/B W2 W1/E L A D GND

6
Thermostat Bard #8403-060

R C G Y1 Y2 O/B W2 W1/E L A YO/D

24 3

Optional CO2 Controller

Bard Part #8403-096

1 24VAC
2

3 CO2 OUT

Unit Low

Voltage

R RT C G Y1 Y2 B/W1 W2 W3 L A D 1 2 3 4 5 6

Term. Strip

4 TEMP-OUT 5 6

12-Pin 9

6 3 2 5 11

Vent Plug

4 12 10

ALL VENT OPTIONS PLUG IN HERE
If not equipped with a ventilation option to plug in, a jumper plug must be installed.

Factory installed jumper. Remove jumper and connect to N.C fire alarm circuit if emergency shutdown required.

2 Wire not needed below 15KW.

3 Wire required for dehumidification models only.

4 Do not connect "A" from thermostat if optional CO2 controller is used

5 0-10 VDC modulating C02 control signal for modulating ventilation control (optional for ECON only - see vent instruction manuals)

Ensure model configuration is heat pump and not heat/cool. Must be configured to programmable and fan set to be programmed fan for the "A" output to function during scheduled occupied 6 periods. Must be configured for multi-stage for Y1 output to be active 1st stage cooling. For dehumidification, must be configured for "No Economizer" for YO/D to be active for humidity control.
7 Do not add these wires if setting up for modulating control.

Factory installed jumper. Remove jumper to activate Balanced Climate TM Mode. A 2-stage thermostat is recommended for balanced climate mode. Y1 Y2 jumper

not present if economizer is factory installed. Units with economizers have balanced

climate jumper in economizer, refer to economizer manual.

MIS-4063 E

Manual 2100-703J Page 18 of 42

FIGURE 9 Thermostat Connections

8 T4 Pro 8403-095 R Rc C

O/B AUX E

T6 Pro 8403-090 or 8403-092

Y2 O/B AUX E

Units With Dehumidification
8403-038 Mechanical Humidistat
7

8403-047 Electronic Humidistat

Optional CO2 Controller

Bard Part #8403-096

1 24VAC
2

3 CO2 OUT

Unit Low

Voltage

R RT C G Y1 Y2 B/W1 W2 W3 L A D 1 2 3 4 5 6

Term. Strip

4 TEMP-OUT 5 6

12-Pin 9

6 3 2 5 11

Vent Plug

4 12 10

ALL VENT OPTIONS PLUG IN HERE
If not equipped with a ventilation option to plug in, a jumper plug must be installed.

Factory installed jumper. Remove jumper and connect to N.C fire alarm circuit if emergency shutdown required.

2 Wire not needed below 15KW.

3 Wire required for dehumidification models only.

For vent operation, add jumper if optional CO2 controller is not used. Vent will run while blower is energized.

For ECON & CRV-V, an additional wire change is required.

See install manual

5 Do not add these wires if setting up for modulating control. See note 6.

6 0-10 VDC Modulating CO2 control signal for modulating ventilation control (Optional for ECON Only) - See vent installation manual.
7 Jumper needs added.
8 Thermostat will not work with units equipped with economizers.
Factory installed jumper. Remove jumper to activate Balanced ClimateTM Mode. 9 A 2-stage thermostat is recommended for Balanced Climate mode. Y1 Y2 jumper
not present if economizer is factory installed. Units with economizers have balanced climate jumper in economizer, refer to economizer manual.

MIS-4064 F

Manual 2100-703J

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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 HFC125.
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 ensure optimal system performance. Refer to instructions for the cylinder that is being utilized for proper method of liquid extraction.
! WARNI NG
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 ultimately 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.
Important Installer Note
For improved start-up performance, wash the indoor coil with dishwashing detergent.

Manual 2100-703J Page 20 of 42

High and Low Pressure Switch
All W**H Series wall-mounted heat pump 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 1 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 three 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.

Condenser Fan Operation
NOTE: Certain models may be equipped with a low ambient control (LAC), and if so, the condenser fan motor will have a delayed start until system refrigerant operating pressure builds up. After starting, the fan motor may or may not cycle depending upon ambient conditions. This is normal operation.
Sequence of Operation
Cooling
Circuit R-Y1 makes at thermostat pulling in compressor contactor, starting the compressor and outdoor motor. (See NOTE under Condenser Fan Operation concerning models equipped with low ambient control.) 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--thus eliminating pressure equalization noise except during defrost, are to be used.
On "Auto" option a circuit is completed from R-B/W1 and R-Y1 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-Y1 circuit, pulling in compressor contactor starting compressor and outdoor motor. R-G also make starting indoor blower motor.
On a call for 2nd stage heating, circuit R-W2 makes at the thermostat pulling in the heat contactor for the strip heat and blower operation. On a call for third stage heat, R-B/W1 breaks, dropping out heat pump, and R-W3 makes, bringing on second heat contactor, if so equipped.
Dehumidification and Electronic Expansion Valve (EEV)
For information on dehumidification and EEV operations, refer to latest version of dehumidification supplemental instructions 7960-828.
Balanced ClimateTM Mode
Balanced ClimateTM is a great comfort feature that can easily be applied under any normal circumstances. If the Bard air conditioning system is being set up in a typical environment where 72°F is the lowest cooling setpoint, remove the Y1/Y2 jumper and install

Manual 2100-703J

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a 2-stage cooling thermostat. This will increase the humidity removal up to 35% and provide a much more comfortable environment.

NOTE:

Units with mechanical dehumidification require an additional connection to be made when enabling Balanced Climate. Refer to dehumidification supplemental instructions for this step.

This mode will also increase the supply temperature when in heating mode. When Balanced Climate mode is activated it is employed in both heating and cooling modes.

If the application is likely to require air conditioning operation below 60°F outdoor conditions, a low ambient control (LAC) kit must be installed. The LAC kit is equipped with an outdoor temperature switch that disables Balanced Climate mode when the outdoor temperature drops below 50°F. This prevents potential evaporator coil freeze up issues. The LAC kit also comes with an evaporator freeze protection thermostat that cuts out the compressor if the evaporator begins to freeze up.

If the unit is being installed with any ventilation package, a Bard LAC kit must be installed. Failure to utilize an LAC with any air conditioner can cause coil freeze up.

Balanced Climate can readily be applied to duct-free (supply and return air grille) applications. It may also be applied to ducted applications with limited static of 0.20" ESP (total including both supply and return statics). Consult Bard Application Engineering for details prior to implementation.

CAUTION: Balanced Climate is not a replacement for a dehumidification (hot gas reheat) unit for extreme applications, but rather an enhancement feature for limited climates and applications.

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 10 on page 24.
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 1/4" 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°F 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 1/4" QC terminal works best) the defrost sensor mounted on the outdoor coil is shunted out and 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.

Manual 2100-703J Page 22 of 42

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 1 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 1 hour, the unit is in "hard" lockout indicating something is certainly wrong and it will not restart itself.
Vent Connection Plug
All units are equipped with a vent connection plug in the side of the control panel for the different ventilation packages to plug in to. If the compressor will not start and there is no "Y1" at the compressor control module, first check to make sure that either the optional vent is plugged into the vent connection plug or the supplied jumper plug is in place. The unit will not operate without anything plugged in. This plug is located on the side of the control panel behind the front vent door (behind the filter access door). If the unit is supplied with a factory-installed vent package, it will be plugged in but the jumper plug will also be tethered next to the connection for troubleshooting purposes, if necessary.
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 covering all models can be found on page 30. It is imperative to match the correct pressure table to the unit by model number.
This unit employs high-flow Coremax valves instead of the typical Shrader type valves.
WARNING! Do NOT use a Schrader valve core removal tool with these valves. Use of such a tool could result in eye injuries or refrigerant burns!

To change a Coremax valve without first removing the refrigerant, a special tool is required which can be obtained at www.fastestinc.com/en/SCCA07H. See the replacement parts manual for replacement core part numbers.
Service Hints
1. Caution owner/operator to maintain clean air filters at all times and to not 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.

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FIGURE 10 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.)

Model W18HB W24HB W30HB W36HB

Setting 60 60 60 60

MIS-2668 A

Manual 2100-703J Page 24 of 42

SERVICE

Solid State Heat Pump Control Troubleshooting Procedure
1. NOTE: A thorough understanding of the defrost cycle sequence is essential. Review that section (page 22) 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 8 Troubleshooting

Sympton

Description, Check and Possible Causes

What & How to Check / Repair

Compressor will not start (heating or cooling)

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

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)

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.

Unit will not come out of defrost (heating only)

Temperature sensor or heat pump control defective

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.

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Checking Temperature Sensor Outside Unit Circuit
1. Disconnect temperature sensor from board and from outdoor coil.
2. Use an ohmmeter to 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, 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, it should be replaced.

TABLE 9 Temperature F vs. Resistance R of Temperature Sensor

F
-25.0 -24.0 -23.0 -22.0 -21.0 -20.0 -19.0 -18.0 -17.0 -16.0 -15.0 -14.0 -13.0 -12.0 -11.0 -10.0
-9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0

R
196871 190099 183585 177318 171289 165487 159904 154529 149355 144374 139576 134956 130506 126219 122089 118108 114272 110575 107010 103574 100260
97064 93981 91008 88139 85371 82699 80121 77632 75230 72910 70670 68507 66418 64399 62449 60565 58745

F
13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 33.0 34.0 35.0 36.0 37.0 38.0 39.0 40.0 41.0 42.0 43.0 44.0 45.0 46.0 47.0 48.0 49.0 50.0

R
56985 55284 53640 52051 50514 49028 47590 46200 44855 43554 42295 41077 39898 38757 37652 36583 35548 34545 33574 32634 31723 30840 29986 29157 28355 27577 26823 26092 25383 24696 24030 23384 22758 22150 21561 20989 20435 19896

F
53.0 52.0 53.0 54.0 55.0 56.0 57.0 58.0 59.0 60.0 61.0 62.0 63.0 64.0 65.0 66.0 67.0 68.0 69.0 70.0 71.0 72.0 73.0 74.0 75.0 76.0 77.0 78.0 79.0 80.0 81.0 82.0 83.0 84.0 85.0 86.0 87.0 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 2100-703J Page 26 of 42

Troubleshooting NIDEC SELECTECH Series ECM Motors
If the Motor Is Running
1. It is normal for the motor to rock back and forth on start up. Do not replace the motor if this is the only problem identified.
2. If the system is excessively noisy, does not appear to change speeds in response to a demand (Heat, Cool, Other) or is having symptoms during the cycle such as tripping limit or freezing coil, check the following:
A. Wait for programmed delays to time out.
B. Ensure that the motors control inputs are wired as shown in the factory-supplied wiring diagram to ensure motor is getting proper control signals and sequencing.
C. Remove the filter and check that all dampers, registers and grilles are open and free flowing. If removing the filters corrects the problem, clean or replace with a less restrictive filter. Also check and clean the blower wheel or coil as necessary.
D. Check the external static pressure (total of both supply and return) to ensure it is within the range as listed on the unit serial plate. If

higher than allowed, additional duct work is needed.
E. If the motor does not shut off at the end of the cycle, wait for any programmed delays to time out (no more than 90 seconds). Also make sure that there is no call for "Continuous Fan" on the "G" terminal.
F. If the above diagnostics do not solve the problem, confirm the voltage checks in the next section below, then continue with the "Model SelecTech Communication Diagnostics".
If the Motor Is Not Running
1. Check for proper high voltage and ground at the (L/L1) (G) (N/L2) connections at the motor (see Figure 11). Correct any voltage issues before proceeding to the next step. The SelecTech motor is voltage specific. Only the correct voltage should be applied to the proper motor. Input voltage within plus or minus 10% of the nominal line power VAC is acceptable.
2. If the motor has proper high voltage and ground at the (L/L1) (G) (N/L2) connections, then continue to "Model SelecTech Communication Diagnostics".

FIGURE 11 Motor Connections

LINE POWER
GROUND
LINE POWER

L2 LINE EARTH POWER GROUND

L1 LINE POWER

NOTE: MOTOR IS CONSTANTLY POWERED BY LINE VOLTAGE

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Model SelecTech Communication Diagnostics
The SelecTech motor is communicated through 24 VAC low voltage (thermostat control circuit wiring).
1. Start with unit wiring diagram to confirm proper connections and voltage (see Figure 12).
2. Initiate a demand from the thermostat and check the voltage between the common and the appropriate motor terminal (1-5). ("G" input is typically on terminal #1, but always refer to wiring diagram.)
A. If the low voltage communication is not present, check the demand from the thermostat. Also check the output terminal and wire(s) from the terminal strip or control relay(s) to the motor.

B. If the motor has proper high voltage as identified above (If the Motor Is Not Running #1 on page 27), proper low voltage to a programmed terminal and is not operating, the motor has failed and will require replacement.

FIGURE 12 Motor Connections

24VAC Common
24VAC "R" Signal through thermostat output.
Speed Tap 1: Vent Speed Speed Tap 2: Balanced Climate Speed Speed Tap 3: Default Speed Speed Tap 4: Medium Speed Speed Tap 5: High Speed
24VAC Common
24VAC "R" Signal through thermostat output.

Manual 2100-703J Page 28 of 42

Fan Blade Setting Dimensions
The correct fan blade setting for proper air delivery across the outdoor coil is shown in Figure 13. Refer to Table 10 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

A IRFLO W

M IS-1 7 2 4

"A "

TABLE 10 Fan Blade Dimension

Model

Dimension A

W18HB W24HB

1.00"

W30HB W36HB

1.25"

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 nine screws holding fan shroud to condenser and bottom.
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 pressure tables on the following pages 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.

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TABLE 11A Cooling Pressure

Air Temperature Entering Outdoor Coil °F

Model

Return Air Temp (DB/WB)

Pressure

75 80

85 90 95 100 105 110 115 120 125 131

W18HB W24HB W30HB W36HB

75/62 80/67 85/72 75/62 80/67 85/72 75/62 80/67 85/72 75/62 80/67 85/72

Low Side High Side
Low Side High Side
Low Side High Side
Low Side High Side
Low Side High Side
Low Side High Side
Low Side High Side
Low Side High Side
Low Side High Side
Low Side High Side
Low Side High Side
Low Side High Side

124 126 129 131 133 136 138 140 142 144 146 149 294 315 337 359 383 408 434 461 488 517 546 583

132 135 138 140 143 145 147 150 152 154 157 159 301 323 345 369 393 419 445 472 501 530 560 598

137 140 142 145 148 150 153 155 157 160 162 165 312 334 357 382 407 433 461 489 518 548 580 619

121 125 128 131 133 135 137 139 141 142 143 144 298 319 341 365 389 414 440 467 495 524 554 591

130 133 137 140 142 145 147 149 151 152 153 154 306 328 350 374 399 424 451 479 508 537 568 606

134 138 141 145 147 150 152 154 156 157 159 160 317 339 363 387 413 439 467 496 525 556 588 628

133 135 136 138 139 141 143 144 146 148 150 153 320 337 356 377 400 426 453 482 513 547 582 627

143 144 146 147 149 151 152 154 156 158 161 163 328 346 365 387 411 437 465 495 527 561 597 644

148 149 151 152 154 156 158 160 162 164 166 340 358 378 400 425 452 481 512 545 581 618

--*

129 131 133 135 137 139 140 142 144 145 147 148 322 344 366 390 414 440 466 493 522 552 582 620

138 140 142 145 146 148 150 152 154 155 157 159 330 352 375 400 425 451 478 506 535 566 597 636

143 145 147 150 152 154 156 157 159 161 162 342 365 389 414 440 467 495 524 554 585 618

--*

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 and 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 on page 21.
* Operating at these conditions would be outside the compressor operating envelope and is not recommended.

TABLE 11B Heating Pressure

Air Temperature Entering Outdoor Coil °F

Model Indoor

Heating

10 15 17 20 25 30 35 40 45 47 50 55 60 65

W18HB 70 W24HB 70 W30HB 70 W36HB 70

Suction Pressure 41.70 48.00 54.50 61.20 64.00 68.20 75.40 82.90 90.70 98.60 106.90 110.20 115.30 124.00 133.00 142.20 Head Pressure 243.00 250.20 257.70 265.40 268.50 273.30 281.40 289.80 298.40 307.20 316.20 319.90 325.50 335.00 344.70 354.70
Suction Pressure 39.10 45.10 51.30 57.70 60.40 64.40 71.40 78.60 86.10 93.80 101.80 105.10 110.10 118.60 127.40 136.40 Head Pressure 255.50 264.90 274.30 283.60 287.30 292.90 302.10 311.30 320.50 329.70 338.80 342.40 347.80 356.90 365.90 374.80
Suction Pressure 39.40 45.50 51.80 58.40 61.00 65.10 72.00 79.10 86.50 94.00 101.70 104.90 109.70 117.80 126.20 134.70 Head Pressure 254.60 260.70 267.10 273.70 276.40 280.60 287.70 295.10 302.80 310.70 318.90 322.20 327.30 336.00 344.90 354.20
Suction Pressure 39.50 44.80 50.40 56.30 58.50 62.50 69.00 75.80 82.90 90.30 98.00 101.20 106.00 114.30 122.90 131.70 Head Pressuree 289.40 293.90 298.90 304.60 307.10 310.90 317.80 325.40 333.50 342.20 351.60 355.50 361.50 372.10 383.30 395.10

Manual 2100-703J Page 30 of 42

TABLE 12 Cooling Pressure Balanced Climate Airflow
Air Temperature Entering Outdoor Coil °F

Model

Return Air Temp (DB/WB)

Pressure

75 80 85 90 95 100 105 110 115 120 125 131

W18HB W24HB W30HB W36HB

75/62 80/67 85/72 75/62 80/67 85/72 75/62 80/67 85/72 75/62 80/67 85/72

113 119 123 127 131 134 136 138 139 140 140 140 285 308 331 355 380 405 431 457 484 512 540 574

121 127 132 136 140 143 145 147 149 150 150 149 292 316 340 365 390 416 442 469 497 525 553 589

125 131 136 141 145 148 151 153 154 155 155 155 302 327 352 377 403 430 458 486 514 543 573 609

116 118 121 123 125 127 129 131 133 134 136 138 294 314 336 359 382 406 431 457 484 512 541 577

124 126 129 131 134 136 138 140 142 144 145 147 301 323 345 368 392 417 442 469 497 525 555 592

128 131 133 136 138 141 143 145 147 149 151 153 312 334 357 381 405 431 458 486 514 544 574 612

125 127 129 131 133 135 137 138 140 142 144 146 308 327 348 370 395 420 447 476 507 539 573 615

134 136 138 140 142 144 146 148 150 152 154 156 316 336 357 380 405 431 459 489 520 553 587 631

139 141 143 145 147 149 151 153 155 157 159 327 348 370 393 419 446 475 506 538 572 608

--*

122 124 126 128 129 131 133 134 136 137 138 140 312 335 358 381 405 429 454 479 504 530 556 588

131 133 135 137 138 140 142 144 145 147 148 150 320 343 367 391 415 440 465 491 517 544 570 603

135 137 139 141 143 145 147 149 150 152 153 155 331 355 380 405 430 456 482 508 535 563 590 624

Low side pressure ± 4 PSIG High side pressure ± 10 PSIG
Tables are based upon Balanced Climate 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 and 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 on page 21.
* Operating at these conditions would be outside the compressor operating envelope and is not recommended.

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TABLE 13 Electrical Specifications

Single Circuit

Dual Circuit

Model

Rated Volts & Phase

No. Field Power Circuits

Minimum
Circuit Ampacity

Maximum External
Fuse or Ckt. Brkr.

Field Power Wire Size

Ground
Wire

Minimum
Circuit Ampacity

Maximum

External Fuse Field Power

or Ckt.

Wire Size

Breaker

Ckt. Ckt. Ckt. Ckt. Ckt. Ckt. ABABAB

Ground Wire Size
Ckt. Ckt. AB

W18HB-A00, A0Z

A04 230/208-1 1

A08

12 12

W24HB-A00, A0Z

A04 230/208-1 1

A08

1 or 2 62

10 10

8 41 21 45 25 8 10 10 10

W24HB-B00, B0Z B05

230/208-3

1 1

15 30

12 12

10 10

W24HB-C00, C0Z C05

460-3

1 1

8 16

14 14

12 12

W30HB-A00, A0Z

A05 230/208-1 1

A10

1 or 2 76

8 50 26 50 30 8 10 10 10

W30HB-B00, B0Z

B05 230/208-3 1

B09

10 10

W30HB-C00, C0Z

C05 460-3

C09

W36HB-A00, A0Z

A05 A10

230/208-1

1 1 or 2

53 79

A15

1 or 2 85

W36HB-B00, B0Z

B05 230/208-3 1

B09

14 14

12 12

10 10

8 53 26 60 30 6 10 10 10

8 27 58 30 60 10 6 10 10

10 10

W36HB-C00, C0Z

C05 460-3

C09

14 14

12 12

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. 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.
NOTE: The Maximum Overcurrent Protection (MOCP) value listed is the maximum value as per UL 1995 calculations for MOCP (branchcircuit 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 2100-703J Page 32 of 42

Setting Unit Airflow
The unit is set from the factory at the default speed. Most units have three selectable cooling speed taps that can be utilized. The default speed is the lowest cooling speed. The two higher speed taps can be used for higher duct static applications so that the unit can maintain the recommended airflow as shown in Table 14. The higher speeds can also be used when higher sensible cooling is desired. To change to the higher speed taps, move the orange/black wire on the blower speed terminal block to either MED or HI. Refer to Table 16 on page 37 for the corresponding airflow of each tap. Set the unit duct static based on the highest airflow that the unit will run at.
TABLE 14 Recommended Airflow

Model

Nominal Rated CFM*

Nominal Rated ESP*

Recommended Airflow Range

Factory Speed Connection

W18HB 600 W24HB 800 W30HB 1000 W36HB 1100

.10

550 - 725

.10

700 - 950

Default

.15

900 - 1125

.15

1000 - 1200

* Rated CFM and ESP on factory speed connection.

NOTE: Be sure to adjust the system static or blower speed to maintain airflows above the minimum recommendations to prevent freeze up conditions if Balanced Climate mode is activated.

Do not operate the unit in Balanced Climate mode if running high static applications as indicated in the blower performance table. If Balanced Climate mode is activated as described on page 15, the unit will run in this mode at all times unless there is a call for ventilation, electric heat or 2nd stage cooling from a 2-stage thermostat. At that time, the unit will automatically activate a higher speed tap.
Blower Speeds
Five factory programmed speed taps (torque settings) are available for the motor, and are selected through different unit modes of operation. These modes are energized by 24VAC signals from the low voltage terminal block located inside the control panel by a thermostat or other controlling device. Each speed tap is programmed by Bard at the factory to different motor torque settings (see Figure 14).

FIGURE 14 Speed Taps
24VAC Common
24VAC "R" signal through thermostat output
Speed Tap 1: Vent Speed Speed Tap 2: Balanced Climate Speed Speed Tap 3: Default Speed Speed Tap 4: Medium Speed Speed Tap 5: High Speed
Multiple motor speed taps may be energized simultaneously by 24VAC power during different modes of operation. The highest number speed tap energized takes priority with 5 being the highest and 1 being the lowest. See Table 15 on page 34 for the corresponding blower speeds with the different modes of operation. Programmed blower speed taps are as follows (see also Figure 15): Speed Tap 1: Vent/blower only speed Speed Tap 2: Balanced Climate speed Speed Tap 3: Default LO cooling & heating speed. Energized by default for cooling operation through the blower speed tap selection and is labeled as LO. Speed Tap 4: Optional MED Cooling & heating speed. Selected manually through the blower speed tap selection and is labeled as MED. Speed Tap 5: Optional HI cooling & heating speed. Selected manually through the blower speed tap selection and is labeled as HI.
FIGURE 15 Speed Taps
Orange Wire w/Black Stripe

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TABLE 15 Blower Speeds for Unit Operational Modes

Unit Operation
Blower Only Balanced Climate Cooling Full Load Cool Balanced Climate Heat Pump Heating Full Load Heat Pump Heating 1st Stage Electric Heat 2nd Stage Electric Heat Dehumidify2

Thermostat Inputs 24VAC

G Y1 Y2 B/W1 W2 W3 D X XX XXX

XXX X
X XX
X

Speed Taps 1 2 3-4-51

Blower Speed

Compressor Operation

Vent/Blower Only

Off

Balanced Climate

X Lo/Med/Hi

Balanced Climate

X Lo/Med/Hi

Off

X Lo/Med/Hi

Off

Balanced Climate

¹ Fan speed is selectable through the blower speed control terminal block. LO (default), MED or HI speeds can be used. 2 Dehumidification operation is disabled when a call for heating or cooling occurs. Unit runs at Balanced Climate speed
during dehumidification operation.

Speed Tap 1 Vent/Blower Only
Speed taps 1 and 3 are programmed to identical torque settings in the ECM motor. This means that if speed tap 1 is energized, the airflow amount will be the same as default airflow. Tap 1 is used when a vent is installed and ventilation is called for by energizing the A terminal of the low voltage terminal block with 24VAC. Speed tap 1 is the lowest priority; if any of the other speed taps are energized, they will override speed tap 1.
Speed Tap 2 Balanced Climate
Speed tap 2 is programmed to a lower than rated speed in the ECM motor. In order for Balanced Climate speed to be used during compressor cooling mode, the jumper between Y1 and Y2 must be removed. This means that if speed tap 2 is energized, the airflow amount will be lower than default airflow. Tap 2 is used when Balanced Climate is called for by energizing the Y1 terminal of the low voltage terminal block with 24VAC. Speed tap 2 is overridden if taps 3, 4, or 5 are energized.
Speed Tap 3 Default LO Cooling & Heating
Speed tap 3 is programmed for rated speed in the SelecTech motor. This means that if speed tap 3 is energized, the airflow amount will be the default airflow. Tap 3 is used by default when cooling is called for by energizing the Y1 terminal of the low voltage terminal block with 24VAC. The unit is shipped with

the jumper between Y1 and Y2 installed and it must be removed to use Balanced Climate mode. The unit is shipped with the orange/black wire connected to terminal LO (rated speed) on the blower selection speed terminal block. Speed tap 3 can be overridden if taps 4 or 5 are energized by changing the position of the orange/black wire on the blower selection speed terminal block to MED (4) or HI (5) positions.
Speed Tap 4 Optional MED Cooling & Heating
Speed tap 4 is programmed to a higher than rated speed in the ECM motor. This is a user-selectable airflow amount that will be higher than rated airflow. Tap 4 is used for cooling operation if the orange/black wire on the blower speed selection terminal block is moved to MED. Speed tap 4 can be overridden if tap 5 is energized.
Speed Tap 5 Optional HI Cooling & Heating
Speed tap 5 is programmed to the highest speed in the ECM motor. This is a user-selectable airflow amount that will provide the highest rated airflow. Tap 5 is used for cooling operation if the orange/black wire on the blower speed selection terminal block is moved to HI.

Manual 2100-703J Page 34 of 42

Dirty Filter Switch
1. Disconnect all power to the unit. Remove control panel outer cover and upper front panel.
2. The dirty filter switch is located on top of the filter partition to the right of the blower wheels (see Figure 16). The dirty filter indicator light and reset switch is attached to the side of the control panel on the right side of the filter access opening. Remove the cover on the dirty filter switch and ensure the knob is set at 0.4" W.C. (see Figure 17 on page 36). This is only a recommended starting point prior to making switch adjustments. Switch setting is highly dependent on filter type used, blower speed, unit ducting and other unit installation characteristics. See Dirty Filter Switch Adjustment for instructions on how to make proper switch adjustments.
3. Re-install upper front panel.
Dirty Filter Switch Adjustment
1. Apply power to the unit.
2. Turn the unit indoor blower on (energize R-G on low voltage terminal board).

3. With air filters installed and switch initially set at 0.4" W.C. (see Step 2 under Dirty Filter Switch), begin restricting the air filter of the unit using a piece of cardboard under the filters until the switch trips and the light comes on. If the filter is restricted by 75% (or desired restriction amount), skip to Step 6.
4. If switch setting adjustment is required, disconnect power to the unit. Remove the upper front panel and the cover on the airflow switch so that adjustment can be made. If the switch tripped before 75% restriction was reached, turn the knob slightly clockwise. If the switch tripped after 75%, turn the knob counter-clockwise (see Figure 17 on page 36).
5. Replace the upper front panel and repeat Steps 1-3. Continue to make adjustments described in Step 4 until the desired restriction is obtained.
6. Remove the restriction and reset the filter switch. Replace the switch cover once adjustment is complete.
7. Install the outer control panel cover. This completes the adjustment.

FIGURE 16 Dirty Filter Switch Location

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FIGURE 17 Adjusting Dirty Filter Switch
TURN CLOCKWISE TO INCREASE RESTRICTION AMOUNT REQUIRED TO ACTIVATE THE SWITCH AND COUNTER-CLOCKWISE TO DECREASE RESTRICTION AMOUNT
MIS-4086 B
Manual 2100-703J Page 36 of 42

TABLE 16 Indoor Blower Performance

W18HB W24HB W30HB W36HB

E.S.P.1 (In. H2O)
0.00 0.10 0.15 0.20 0.25 0.30 0.40 0.50 0.00 0.10 0.15 0.20 0.25 0.30 0.40 0.50 0.00 0.10 0.15 0.20 0.25 0.30 0.40 0.50 0.00 0.10 0.15 0.20 0.25 0.30 0.40 0.50

Balanced ClimateTM Speed

Dry Coil 600 500 453

Wet Coil 583 486 439

653

636

583

567

549

534

516

501

856

823

778

751

740

713

702

674

929

903

870

848

839

819

808

788

Default LO Cooling & Heating/ Ventilation Speed2

Dry Coil Wet Coil

665

648

600

584

568

553

537

523

507

493

477

464

420

407

365

352

840

834

818

809

806

794

793

778

777

761

758

742

716

701

664

655

1083

1063

1053

1036

1019

1016

999

995

977

972

953

921

896

863

830

1175

1156

1157

1138

1143

1124

1128

1107

1109

1088

1065

1039

1010

978

944

Optional MED Cooling & Heating
Speed

Dry Coil Wet Coil

756

746

722

709

704

690

684

670

664

650

643

629

598

586

549

542

960

953

934

930

926

915

898

899

878

880

856

831

806

767

747

Dedicated electric heat speed (same as
W36HB default speed)

1372 1361 1348 1331 1310 1284 1218 1135

1355 1335 1318 1297 1271 1242 1169 1080

Optional HI Cooling & Heating Speed

Dry Coil 799 775 760 745 727 708 665 616 1115 1075 1058 1040 1017 988 912 814 1372 1361 1348 1331 1310 1284 1218 1135 1475 1456 1438 1415 1386 1352 1267 1160

Wet Coil 794 764 747 730 712 693 652 608 1110 1070 1044 1014 981 944 860 761 1355 1335 1318 1297 1271 1242 1169 1080 1465 1429 1404 1374 1339 1299 1203 1088

1 E.S.P. is the total combined external static pressure of both the supply and return ducts or grills. 2 This is the speed set at the factory.

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TABLE 17 Maximum ESP of Operation
Electric Heat Only

Model

ESP

W18H W24H

A00/0Z A04 A08

.50 .40 .35

W24H

B00/0Z B05

.50 .40

W24H

C00/0Z C05

.50 .40

Model

W30H W36H
W30H W36H
W30H W36H

A00/0Z A05 A10 A15
B00/0Z B05 B09
C00/0Z C05 C09

Front Outlet

Low

High

Speed Speed

.50

.40

.50

.35

.40

.35

.40

.50

.40

.50

.30

.35

.50

.40

.50

.30

.40

Models KW 4 5 8 9 10 15

240V-1 Amps BTUH 16.7 13652 20.8 17065 33.3 27304

41.7 62.5

34130 51195

TABLE 18 Electric Heat

208V-1 Amps BTUH 14.4 10239 18.0 12799 28.8 20478

36.1 54.1

25598 38396

240V-3 Amps BTUH
12.0 17065
21.7 30717

208V-3 Amps BTUH
10.4 12799
18.7 23038

460V-3 Amps BTUH

6.0

17065

10.8 30717

Manual 2100-703J Page 38 of 42

W18HB-A W24HB-A W24HB-B W24HB-C W30HB-A W30HB-B W30HB-C W36HB-A W36HB-B W36HB-C

TABLE 19 Optional Accessories

Heater Kits
Circuit Breaker (WMCB) &
Pull Disconnect (WMPD)

Part Number

EHW18H-A04 X

EHW18H-A08 X

EHW2HB-A04

EHW2HB-A08

EHW2HB-B05

EHW2HB-C05

EHW3HB-A05

EHW3HB-A10

EHW3HB-A15

EHW3HB-B05

EHW3HB-B09

EHW3HB-C05

EHW3HB-C09

EHW30HB-A05

EHW30HB-A10

EHW30HB-B05

WMCB-02A

WMCB-02B

WMCB-03A

WMCB-03B

WMCB-05A

WMCB-06A

WMPD-01C

Manual 2100-703J

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TABLE 20 Vent and Control Options

W18 W24 W30, W36

Part Number
CMC-15 CMC-31 CMC-34 CMC-36 CMC-37 CMH-28 CMH-33 CMH-34
CMH-37
CMH-38
SK-111 BOP2 FAD-NE2 FAD-BE2 CRV-F2-* CRV-V2-* ECON-NC2-* ECON-S2-* ECON-WD2-* ECON-DB2-* ERV-FA2-* ERV-FC2-* BOP3 FAD-NE3 FAD-BE3 CRV-F3-* CRV-V3-* ECON-NC3-* ECON-S3-* ECON-WD3-* ECON-DB3-* ERV-FA3-* ERV-FC3-*

Description

Start Relay (PTCR based)

XXX

Dirty Filter Sensor Kit

XXX

Alarm Relay

XXX

Crankcase Heater 230V

XXX

Crankcase Heater 460V

XXX

Outdoor Thermostat Heat Pump (ODT)

XXX

Low Ambient Control Modulating Heat Pump (LAC) X

Low Ambient Control Heat Pump (LAC)
Low Ambient Control Modulating and Outdoor Thermostat Heat Pump (LAC & ODT) Low Ambient Control and Outdoor Thermostat Heat Pump (LAC & ODT) Start Kit (Hard Start)

XX X
XX XXX

Blank Off Plate

Fresh Air Damper No Exhaust

Fresh Air Damper Barometric Exhaust

Commercial Ventilator On/Off, Spring Return

Commercial Ventilator 0-10V, Spring Return

Economizer Bldg. Equipment, 0-10V, No Controls X X

Economizer School

Economizer Bldg. Equipment, Enthalpy

Economizer Bldg. Equipment, Temperature

Energy Recovery Ventilator (230V)

Energy Recovery Ventilator (460V)

Blank Off Plate

Fresh Air Damper No Exhaust

Fresh Air Damper Barometric Exhaust

Commercial Ventilator On/Off, Spring Return

Commercial Ventilator 0-10V, Spring Return

Economizer Bldg. Equipment, 0-10V, No Controls

Economizer School

Economizer Bldg. Equipment, Enthalpy

Economizer Bldg. Equipment, Temperature

Energy Recovery Ventilator (230V)

Energy Recovery Ventilator (460V)

PTCR Start Kit can be used with all -A single phase models. Increases starting torque 2-3x. Not used for -B or -C three phase models. Do not use if SK111 is used.
Start capacitor and potential relay start kit can be used with all -A single phase models. Increases starting torque 9x. Not used for -B or -C three phase models. Do not use if CMC-15 is used.

* Insert color to match unit (X = Beige, 1 = White, 4 = Buckeye Gray, 5 = Desert Brown, 8 = Dark Bronze, S = Stainless, A = Aluminum

Manual 2100-703J Page 40 of 42

GRAPH 1 W18HB FAD-NE2, 3 W/O Exhaust Ventilation Delivery
GRAPH 2 W24HB FAD-NE2, 3 W/O Exhaust Ventilation Delivery

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GRAPH 3 W30HB FAD-NE2, 3 W/O Exhaust Ventilation Delivery
GRAPH 4 W36HB FAD-NE2, 3 W/O Exhaust Ventilation Delivery
Manual 2100-703J Page 42 of 42

References

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