Bard WH184, WH242 Installation Instructions Manual

INSTALLATION INSTRUCTIONS

WALL MOUNTED

PACKAGE HEAT PUMP

Models

WH184
WH242

Bard Manufacturing Company, Inc.
Bryan, Ohio 43506

Since 1914...Moving ahead just as planned.

Manual : 2100-423C
Supersedes: 2100-423B
File: Volume III Tab 17
Date: 08-01-07

© Copyright 2003

Manual 2100-423C
Page 1 of 21

Contents

Getting Other Informations and Publications 3

Wall Mount General Information

Heat Pump Wall Mount Model Nomenclature.......... 4

Shipping Damage .................................................... 4

General .......................................................... 4 & 6

Duct Work .......................................................... 6 & 7

Filters ................................................................ 7

Fresh Air Intake ....................................................... 7

Condensate Drain .................................................... 7

Installation Instructions

Wall Mounting Information ....................................... 8

Mounting the Unit .................................................... 8

Wiring – Main Power ............................................. 12

Wiring – Low Voltage Wiring ................................. 13

Optional Outdoor Thermostat Applications .... 13 & 14

Figures

Figure 1 Unit Dimensions ...................................... 5

Figure 2 Fresh Air Damper Assembly ................... 7

Figure 3 Mounting Instructions .............................. 9

Figure 4 Wall Mounting Instructions.................... 10

Figure 5 Wall Mounting Instructions.................... 10

Figure 6 Common Wall Mounting Installations..... 11

Figure 7 Unit 24V Terminal Board ....................... 12

Figure 8 Compressor Cutoff Thermostat

Wiring ................................................... 13

Figure 9 Electric Heat Hold-Off Wiring ................ 14

Figure 10 Start Up Procedure Decal ..................... 15

Figure 11 Defrost Control Board ........................... 16

Figure 12 Fan Blade Setting ................................. 19

Start Up

Important Installer Note ......................................... 15

Crankcase Heaters ................................................ 15

Service Hints ......................................................... 15

Sequence of Operation .......................................... 15

Pressure Service Ports .......................................... 16

Defrost Cycle ......................................................... 16

Troubleshooting

Solid State Heat Pump Control

Troubleshooting Procedure ................................... 17

Checking Temperature Sensor Outside

Unit Circuit ............................................................. 18

Fan Blade Setting Dimensions .............................. 19

Removal of Fan Shroud ......................................... 19

Refrigerant Charge ................................................ 19

Pressure Tables ..................................................... 20

Optional Accessories ............................................. 21

Tables

Table 1 Electric Heat Table .................................. 4

Table 2 Electrical Specifications .......................... 6

Table 3 Thermostat Wire Size ........................... 13

Table 4 Wall Thermostat .................................... 14

Table 5 Troubleshooting .................................... 17

Table 6 Fan Blade Dimensions .......................... 19

Table 7 System Charge Ratings ........................ 19

Table 8 Indoor Blower Performance .................. 19

Table 9 Rated CFM and Rated ESP .................. 19

Table 10 Maximum ESP of Operation.................. 19

Table 11 Pressure Table – Cooling ...................... 20

Table 12 Pressure Table – Heating...................... 20

Table 13 Optional Accessories ............................ 21

Manual 2100-423C
Page 2 of 21

Getting Other Information and Publications

These publications can help you install the air
conditioner or heat pump. You can usually find these at
your local library or purchase them directly from the
publisher. Be sure to consult current edition of each
standard.

National Electrical Code ...................... ANSI/NFPA 70

Standard for the Installation .................

of Air Conditioning and Ventilating Systems

Standard for Warm Air .........................

Heating and Air Conditioning Systems

Load Calculation for .............................ACCA Manual J

Residential Winter and Summer Air Conditioning

Duct Design for Residential .................

Winter and Summer Air Conditioning and Equipment
Selection

ANSI/NFPA 90A

ANSI/NFPA 90B

ACCA Manual D

For more information, contact these
publishers:

ACCA Air Conditioning Contractors of America

1712 New Hampshire Ave. N.W.
Washington, DC 20009
Telephone: [phone]
Fax: [phone]

ANSI American National Standards Institute

11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone]
Fax: [phone]

ASHRAEAmerican Society of Heating Refrigerating,

and Air Conditioning Engineers, Inc.

1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: [phone]
Fax: [phone]

NFPA National Fire Protection Association

Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone]
Fax: [phone]

Manual 2100-423C
Page 3 of 21

WALL MOUNT GENERAL INFORMATION

HEAT PUMP WALL MOUNT MODEL NOMENCLATURE

WH 24 2— A 08 X X X X X B

MODEL NUMBER

CAPACITY
18 - 1½ Ton
24 - 2 Ton

VENTILATION OPTIONS
X - Barometric Fresh Air Damper (Standard)
B - Blank-off Plate
M - Motorized Fresh Air Damper
V - Commercial Room Ventilator - Motorized w/Exhaust
E - Economizer (Internal) - Fully Modulating w/Exhaust
R - Energy Recovery Ventilator - w/Exhaust

NOTE: For 0 KW & circuit breakers (230/208 Volt) or pull disconnects (460 Volt) applications, insert 0Z in the KW field of model number.

REVISIONS

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

KW

COLOR OPTIONS
X - Beige (Standard)
1 - White
2 - Mesa Tan
4 - Buckeye Gray

FILTER OPTIONS
X - 1-Inch Throwaway (Standard)
W - 1-Inch Washable
P - 2-Inch Pleated

OUTLET OPTIONS
X - Front (Standard)

CONTROL MODULES

COIL OPTIONS
X - Standard
1 - Phenolic Coated Evaporator
2 - Phenolic Coated Condenser
3 - Phenolic Coated Evaporator

and Condenser

TABLE 1

ELECTRIC HEAT TABLE

sledoMA-481HWA-242HWB-242HWC-242HW

1-0421-8021-0421-8023-0423-8023-064

WKAUTBAUTBAUTBAUTBAUTBAUTBAUTB
4
8

7.61056314.41042017.61056314.4104201

3.33003728.82574023.33003728.8257402

6

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.

4.41005025.21063512.757402

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 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.

Manual 2100-423C
Page 4 of 21

FIGURE 1

UNIT DIMENSIONS

Manual 2100-423C
Page 5 of 21

TABLE 2

ELECTRICAL SPECIFICATIONS

TIUCRICELGNIS

1

mumixaM
detaR
stloV

dna

ledoM

Z0A,00A-481HW
40A

3 80A

Z0A,00A-242HW
40A

3 80A

Z0B,00B-242HW
60B

Z0C,00C-242HW
60C

1 Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.

2 Based on 75° C copper wire. All wiring must conform to NEC and all local codes.

3 Maximum KW that can operate with heat pump on.

4 These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric

Code (latest revision), article 310, for power conductor sizing.

CAUTION: When more than one field power conductor circuit is run through one conduit the conductors must be derated.

Pay special attention to note 89 of table 310 regarding Ampacity Adjustment Factors when more than 3 are in a
raceway.

esahP

1-802/032

1-802/032

3-802/032

3-064

dleiF.oN

rewoP

stiucriC

1
1
1

1
1
1

1
1

1
1

4

muminiM

tiucriC

yticapmA

71
83
95

81
93
06

51
33

8

71

lanretxE

roesuF

tiucriC

rekaerB

52
04
06

52
04
06

02
53

51
02

2

dleiF

rewoP

21
01

6

21
01

6

21

8

41
21

2

dnuorG

eziSeriW

eziSeriW

21
01
01

21
01
01

21
01

41
21

Size of unit for a proposed installation should be based
on heat loss 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

Any heat pump is more critical of proper operating
charge and an adequate duct system that a straight air
conditioning unit. All duct work, supply and return,
must be properly sized for the design air flow
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

Manual 2100-423C
Page 6 of 21

the conditioned space should be properly insulated in
order to both conserve energy and prevent condensation
or moisture damage.

Refer to Table 10 for maximum static pressure available
for duct design.

Design the duct work according to methods given by the
Air Conditioning Contractors of America (ACCA).
When duct runs through unheated spaces, it should be
insulated with a minimum of one inch of insulation.
Use insulation with a vapor barrier on the outside of the
insulation. Flexible joints should be used to connect the
duct work to the equipment in order to keep the noise
transmission to a minimum.

A 1/4 inch clearance to combustible material for the
first three feet of duct attached to the outlet air frame is
required. See Wall Mounting Instructions and Figures
3, 4 and 5 for further details. Ducts through the walls
must be insulated and all joints taped or sealed to
prevent air or moisture from entering the wall cavity.

CAUTION

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 inches.

Any grille that meets the 5/8 inch louver criteria may be
used. It is recommended that Bard Return Air Grille Kit
RG2 through RG5 or RFG2 through RFG5 be installed
when no return duct is used. Contact distributor or
factory for ordering information. If using a return air
filter grille, filters must be of sufficient size to allow a
maximum velocity of 400 fpm.

NOTE: If no return air duct is used, applicable

installation codes may limit this cabinet to
installation only in a single story structure.

FILTERS

A 1-inch throwaway filter is supplied with each unit.
The filter slides into position making it easy to service.
This filter can be serviced from the outside by removing
the service door. A 1-inch washable filter and a 2-inch
pleated filter are also available as optional accessories.
The internal filter brackets are adjustable to
accommodate the 2-inch filter by loosening two screws
in each bracket assembly and sliding the brackets apart
to the required width and retightening the four screws.

FRESH AIR INTAKE

All units are built with fresh air inlet slots punched in
the service panel.

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 2.

All capacity, efficiency, and cost of operation
information as required for Department of Energy
“Energyguide” Fact Sheets 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 2

FRESH AIR DAMPER ASSEMBLY

CONDENSATE DRAIN

A plastic drain hose extends from the drain pan at the
top of the unit down to the unit base. There are
openings in the unit base for the drain hose to pass
through. In the event the drain hose is connected to a
drain system of some type, it must be an open or vented
type system to assure proper drainage.

Manual 2100-423C
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