Bard W24G3-B, W30G3-C, W24G3-C, W30G3-B, W36G3-A Installation Instructions Manual

INSTALLATION INSTRUCTIONS

WALL MOUNTED GAS/ELECTRIC

Models:

W24G3-A
W24G3-B
W24G3-C

W30G3-A
W30G3-B
W30G3-C

W36G3-A
W36G3-B
W36G3-C

W42G3-A
W42G3-B
W42G3-C

WARNING

READ ALL INSTRUCTIONS CAREFULLY BEFORE
BEGINNING THE INSTALLATION.

THE INSTALLATION MUST COMPLY WITH THESE
INSTRUCTIONS AND THE REQUIREMENTS OF
ALL GOVERNING CODES AND ORDINANCES FOR
THE INSTALLATION LOCATION.

IT IS THE RESPONSIBILITY OF INSTALLER
TO KNOW AND UNDERSTAND ALL OF THESE
REQUIREMENTS.

W48G3-A
W48G3-B
W48G3-C

W60G3-A
W60G3-B
W60G3-C

FAILURE TO DO SO COULD CREATE A HAZARD
RESULTING IN PROPERTY DAMAGE, BODILY
INJURY, OR DEATH.

Bard Manufacturing Company, Inc.
Bryan, Ohio 43506

www.bardhvac.com

Manual No.: 2100-630A
Supersedes: 2100-630
Date: 5-4-15

Page 1 of 49

CONTENTS

Page

Getting Other Information and Publications ... 4
Wall Mount Gas/Electric General Information

W**G Series Model Nomenclature ..................... 5

Ventilation Options .......................................... 5

Air Conditioning Module Options ....................... 6

1. Important ..................................................... 10

2. Application ................................................... 10

3. Duct Work ..................................................... 10

4. High Altitude Applications .............................. 11

5. Transportation Damage ................................... 11

6. General Information ....................................... 11

7. Wall Mounting Information ............................. 11

8. Mounting the Unit ......................................... 11

9. Clearances .................................................... 17

10. Vent Terminal and Combustion Inlet Hood ........ 18

11. Optional Vertical Venting ................................ 18

12. Vent Resizing Instructions .............................. 19

13. Fresh Air Intake ............................................. 19

14. Condensate Drain .......................................... 19

15. Wiring – Main Power ...................................... 20

16. Wiring – Low Voltage Wiring ............................ 21

17. Thermostats .................................................. 21

18. Gas Supply and Piping ................................... 26

.. 5

Page

19. Manifold Pressure Adjustment ........................ 27

20. Checking Gas Input Rate ................................ 27

21. Standard Orifice Sizing and High

Altitude Derate .............................................. 29

22. Conversion of Gas Input BTUH from High

to Low Rating ................................................ 32

23. Measuring Air Temperature Rise ...................... 32

24. Filters .......................................................... 33

25. Compressor Control Module ............................ 33

26. Phase Monitor ............................................... 34

27. Lighting and Shutdown Instructions ................ 35

28. Service Agency Procedures ............................. 36

29. Maintaining Unit in Good Working Order .. 36 & 37

30. Replacement Parts ........................................ 37

31. Sequence of Operation – Heating .................... 38

32. Sequence of Operation – Cooling..................... 38

33. Indoor Blower Operation ................................. 39

34. Pressure Service Ports ................................... 47

35. Refrigerant Charge ......................................... 48

36. Fan Blade Setting Dimensions ........................ 48

37. Low NOx Burner Assembly "N" Suffix

Models Only – U.S. Installations Only .............. 48

Index – Wiring Diagrams and Ladder Diagrams ....... 49

Manual 2100-630A
Page 2 of 49

Page

FIGURES

Figure 1 Unit Dimensions .................................. 9

Figure 2 Mounting Instructions – W24-36G ....... 12

Figure 2A Mounting Instructions – W42-60G ....... 13

Figure 3 Combustible Clearance – W24-36G ..... 14

Figure 3A Combustible Clearance – W42-60G ...... 14

Figure 4 Wall Mounting Instructions .................. 15

Figure 5 Wall Mounting Instructions .................. 15

Figure 6 Common Wall Mounting Installations .... 16

Figure 7 Location of Vent Terminal in Shipping ..17

Figure 8 Vent Terminal and Combustion

Air Intake ..........................................18

Figure 9 Fresh Air Damper ............................... 19

Figure 10 Installation of Flexible Conduit ............ 21

Figure 11 Low Voltage Wiring –

No Ventilation Package .......................22

Figure 12 Low Voltage Wiring –
MFAD and Commercial Room Ventilator

Spring and Power ............................... 23

Figure 13 Low Voltage Wiring –

JIFM Economizer. ...............................24

Figure 14 Gas Pipe Connection ........................... 25

Figure 15 Proper Piping Practice ........................ 26

Figure 16 Access Internal Filter through

Upper Service Door .............................33

Figure 17 Lighting and Shutdown

Instruction Label ................................ 35

Figure 18 Top View of Gas Control ......................36

Figure 19 Sequence of Operation – Electronic

Blower Control ...................................38

Figure 20 Furnace Control Board and

Blower Control ...................................39

Figure 21 Fan Blade .......................................... 48

Figure 22 Low NOx Insert .................................. 48

Page

TABLES

Table 1 Specifications – W24-36G Models ........... 7

Table 1A Specifications – W42-60G Models ........... 8

Table 2 Minimum Installation Clearances ........... 17

Table 3 Thermostat Wire Size ............................21

Table 4 Wall Thermostat ................................... 21

Table 5 Length of Standard Pipe Threads ........... 26

Table 6 Gas Pipe Sizes – Natural Gas ................ 26

Table 7 Natural Gas Derate Capacities

for All Models ...................................... 29

Table 8 Natural Gas Orifice Tables – W24-36G ... 30

Table 8A Natural Gas Orifice Tables – W42-60G ...31

Table 9 Motor Speed Taps ................................ 39

Table 10 W24G Indoor Blower Performance .........40

Table 11 W30G Indoor Blower Performance .........41

Table 12 W36G Indoor Blower Performance .........42

Table 13 W42G Indoor Blower Performance ........43

Table 14 W48G Indoor Blower Performance .........44

Table 15 W60G Indoor Blower Performance .........45

Table 16 Integrated Furnace and Blower

Control Operation ................................. 46

Table 17A W24G3-W36G3 Cooling Pressure Table .. 47

Table 17B W42G3-W60G3 Cooling Pressure Table .. 47

Table 18 Fan Blade Dimension ...........................48

Manual 2100-630A
Page 3 of 49

Getting Other Information and Publications

These publications can help when installing the
furnace. 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 Fuel Gas Code ....ANSI Z223.1 / NFPA 54

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

Standard for Chimneys, .......................NFPA 211

Fireplaces, Vents, and Solid Fuel Burning
Appliances

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

Residential Winter and Summer Air Conditioning

For more information, contact these publishers:

ACCA Air Conditioning Contractors of America

1712 New Hampshire Avenue, NW
Washington, DC 20009
Telephone: [phone]

ANSI American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone]
Fax: [phone]

ASHRAE American Society of Heating Refrigerating,
and Air Conditioning Engineers, Inc.

1791 Tullie Circle, NE.
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]

Duct Design for Residential ........ ACCA Manual D

Winter and Winter Air Conditioning and Equipment
Selection

Canadian Electrical Code .....................CSA C22.1

Canadian Installation Code

…………

CAN/CGA B149

BARD MANUFACTURING COMPANY, INC.

BRYAN, OHIO 43506 USA

CSA Canadian Standards Association

178 Rexdale Boulevard
Rexdale, Ontario
Canada. M9W 1R3
Telephone: [phone]

Manual 2100-630A
Page 4 of 49

WALL MOUNT GAS/ELECTRIC GENERAL INFORMATION

MODEL NUMBER NOMENCLATURE

W 42 G 3 – A X C X X X X X X

MODEL

Wall Mount

COOLING
CAPACITY

24 – 2 ton
30 – 2½ ton
36 – 3 ton
42 – 3½ ton
48 – 4 ton
60 – 5 ton

REVISION

GAS/ELECTRIC

FEATURE

(-) – Standard
D – Dehumidification
C – Canadian Approval

VENT

(See table

VOLTAGE

A – 230/208-60-1

– 230/208-60-3

B

– 460-60-3

C

EMISSIONS

X = Standard
N = NOx Certified

HEATING INPUT
2 - 3 Ton 3.5 - 5 Ton

A – 45,000 B – 75,000
B – 67,500 C – 100,000
C – 90,000 D – 125,000*

*125,000 BTU input model is not NOx certified.

below)

FILTER

X – 2" Pleated (Standard)
W – 1" Washable

Ventilation Options

COLOR

X – Beige
(Standard)
4 – Gray

CONTROL OPTIONS

(See table page 6)

COIL OPTIONS

X – Standard
1 – Phenolic coated evaporator
2 – Phenolic coated condenser
3 – Phenolic coated both coils

OUTLET

X – Front (Standard)
T – Top

Models

W24G, W30G, W36G W42G, W48G, W60G

Description

Factory Installed

Code No.

Field Installed

Part No.

Field Installed

Part No.

Barometric Fresh Air Damper X WGBFAD-3 WGBFAD-5

Blank-Off Plate B WGBOP-3 WGBOP-5

Motorized Fresh Air Damper M WGMFAD-3A WGMFAD-5A

Commercial Ventilator – Spring Return V WGCRVS-3A WGCRVS-5A

Commercial Ventilator – Power Return P WGCRVP-3A WGCRVP-5A

Economizer - Fully Modulating 

E WGJIFM-3 WGJIFM-5

Energy Recovery Ventilator – 230 Volt R WGERV-A3B WGERV-A5B

Energy Recovery Ventilator – 460 Volt R WGERV-C3C WGERV-C5C

 Low ambient control is required with economizer for low temperature compressor operation.

Manual 2100-630A
Page 5 of 49

Air Conditioning Module Options

CCM



STD STD STD • H CMA-29

STD – Standard equipment.



CCM Compressor control module has adjustable 30 second to 5 minute delay-on-break timer. On initial power up, or any

time the power is interrupted, the delay-on-make will be 2 minutes plus 10% of the delay-on-break setting. There is no
delay-on-make during routine operation of the unit. The module also provides the lockout feature (with 1 retry) for high
and/or low pressure controls, and a 2-minute timed bypass for low pressure control.



HPC High pressure control is auto reset. Always used with compressor control module (CCM) which is included. See Note

HPC



LPC



LAC



SK



• Field Only SK111 or CMC-15

Factory Installed

Code

Field Installed

Part

.



LPC Low pressure control is auto reset. Always used with compressor control module (CCM) which is included. See Note



LAC Low ambient control permits cooling operation down to 0°F. (Includes fan cycling control + Freeze Stat)



SK CMC-15 is PTCR Start Kit can be used with all -A single phase models. Increases starting torque 2-3X. Not used for -B

or -C 3-phase models. Do not use if SK111 is used.



SK SK111 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 3-phase models. Do not use if CMC-15 is used.

.

Manual 2100-630A
Page 6 of 49

ABLE 1
T

Specifications

W24G, W30G and W36G Models

Models W24G3-A W24G3-B W24G3-C W30G3-A W30G3-B W30G3-C W36G3-A W36G3-B W36G3-C

Minimum Circuit Ampacity 21 16 10 23 17 11 27 20 11

* Field Wire Size 10 12 14 10 12 14 8 10 14

Operating Voltage Range 197-253 187-253 414-506 197-253 187-253 414-506 197-253 187-253 414-506

Electrical Rating – 60 Hz 230/208-1 230/208-3 460-3 230/208-1 230/208-3 460-3 230/208-1 230/208-3 460-3

Ground Wire Size 10 12 14 10 12 14 10 10 14

** Delay Fuse or Circuit Breaker Max. 30 25 15 35 25 15 40 25 15

Compressor

Voltage 230/208 230/208 460 230/208 230/208 460 230/208 230/208 460

Rated Load Amps 9.9/10.9 6.4/7.1 3.9 11.8/12.9 7.5/8.2 4.7 12.4/14.0 7.8/8.8 4.9

Branch Circuit Selection Current 12.8 8.3 5.1 14.1 9.0 5.6 16.7 10.5 5.8

Lock Rotor Amps 64/64 58/58 28 77/77 71/71 38 79/79 73/73 38

Compressor Type Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll

Fan Motor – Amps 1.5 1.5 0.8 1.5 1.5 0.8 1.5 1.5 0.8

Fan Motor – HP/RPM/SPD 1/5-1050-1 1/5-1050-1 1/5-1050-1 1/5-1050-1 1/5-1050-1 1/5-1050-1 1/5-1050-1 1/5-1050-1 1/5-1050-1

Fan Motor and Condenser

Blower Motor – HP/RPM/SPD 1/4-950-3 1/4-950-3 1/4-950-3 1/3-1075-3 1/3-1075-3 1/3-1075-3 1/3-1075-3 1/3-1075-3 1/3-1075-3

Blower Motor – Amps 1.8 1.8 .8 2.2 2.2 1.1 2.2 2.2 1.1

CFM Cooling and E.S.P. 800 - .15 800 - .15 800 - .15 1000 - .35 1000 - .35 1000 - .35 1100 - .25 1100 - .25 1100 - .25

Fan – DIA/CFM 20” - 2400 20” - 2400 20” - 2400 20” - 2400 20” - 2400 20” - 2400 20” - 2400 20” - 2400 20” - 2400

Blower Motor and Evaporator

Filter Size 20 x 25 x 2 20 x 25 x 2 20 x 25 x 2 20 x 25 x 2 20 x 25 x 2 20 x 25 x 2 20 x 25 x 2 20 x 25 x 2 20 x 25 x 2

Shipping Weight – LBS. 500 500 500 530 530 530 530 530 530

* 75° C Copper wire size

** Maximum time delay fuse or circuit breaker

Manual 2100-630A
Page 7 of 49

TABLE 1A

Specifications

W42G, W48G and W60G Models

Models W42G3-A W42G3-B W42G3-C W48G3-A W48G3-B W48G3-C W60G3-A W60G3-B W60G3-C

Minimum Circuit Ampacity 33 25 12 36 26 12 41 27 14

* Field Wire Size 8 8 14 8 8 14 8 8 12

Operating Voltage Range 197-253 187-253 414-506 197-253 187-253 414-506 197-253 187-253 414-506

Electrical Rating – 60 Hz 230/208-1 230/208-3 460-3 230/208-1 230/208-3 460-3 230/208-1 230/208-3 460-3

Ground Wire Size 10 10 14 10 10 14 10 10 12

** Delay Fuse or Circuit Breaker Max. 50 35 15 50 35 15 60 40 20

Manual 2100-630A
Page 8 of 49

Voltage 230/208 230/208 460 230/208 230/208 460 230/208 230/208 460

Rated Load Amps 16/17.9 10.6/11.8 5.5 15.9/18.9 10.0/11.9 5.4 23.2/26.3 14.0/16.6 7.8

Compressor

Branch Circuit Selection Current 19.9 13.1 6.1 21.8 13.8 6.3 26.3 16.6 7.8

Lock Rotor Amps 109/109 83/83 41 117/117 83/83 41 134/134 110/110 52

Compressor Type Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll

Fan Motor – HP/RPM/SPD 1/3-825-2 1/3-825-2 1/3-825-1 1/3-825-2 1/3-825-2 1/3-825-1 1/3-825-2 1/3-825-2 1/3-825-1

Fan Motor – Amps 2.5 2.5 1.3 2.5 2.5 1.3 2.5 2.5 1.3

Fan Motor and Condenser

CFM Cooling and E.S.P. 1300 - .35 1300 - .35 1300 - .35 1550 -.38 1550 -.38 1550 -.38 1650 - .30 1650 - .30 1650 - .30

Blower Motor – Amps 3.4 3.4 1.5 3.4 3.4 1.5 3.4 3.4 1.5

Blower Motor – HP/RPM/SPD 1/2-1050-3 1/2-1050-3 1/2-1050-3 1/2-1050-3 1/2-1050-3 1/2-1050-3 1/2-1050-3 1/2-1050-3 1/2-1050-3

Fan – DIA/CFM 24” - 3050 24” - 3050 24” - 3050 24” - 3050 24” - 3050 24” - 3050 24” - 3050 24” - 3050 24” - 3050

Blower Motor and Evaporator

Filter Size 20 x 30 x 2 20 x 30 x 2 20 x 30 x 2 20 x 30 x 2 20 x 30 x 2 20 x 30 x 2 20 x 30 x 2 20 x 30 x 2 20 x 30 x 2

Shipping Weight – LBS. 700 700 700 710 710 710 725 725 725

* 75° C Copper wire size

** Maximum time delay fuse or circuit breaker

F

G

N

P

D

DD

FF

GG

HH

A

M

I

C

KJ

L

H

R

S

S

S

S

S

T

V

Y

AA

X

U

Z

CC

BB

B

EE

O

E

B

II

Q

W

COMBUSTION

AIR INTAKE

CONTROL

RIGHT SIDE

ENTRANCES

GAS

RETURN OPENING

4 DEG. PITCH IN TOP

PANEL DOOR

DOOR

LOW VOLTAGE

SUPPLY OPENING

PANEL

BACK

DISCONNECT ACCESS

VESTIBULE

PANEL (LOCKABLE)

CONDENSER

AIR INLETS

CONDENSER

VENT OPTION

AIR OUTLET

AIR EXHAUST

COMBUSTION

ENTRANCES

FRONT

CIRCUIT BREAKER/

MIS-3239

HIGH VOLTAGE

ENTRANCES

FRONT DOOR

FILTER

SERVICE

DOOR

UNIT A B C D E F G H I J K L M N O P QR

W24G-W30G-W36G 7.88 27.88 13.88 24.25 40 25.63 81.63 27.38 27.5 39.25 5.88

W42G-W48G-W60G

29.88

15.88

27.25

87.5

3.75

UNIT S T U V W X Y Z AA B B CC DD EE FF GG HH II

W24G-W30G-W36G 12 - 7 HOLES 2.88 22.9 38 17.84 4.44 11.44 9 36.25 2 0.38

W42G-W48G-W60G

42

10

2.75

0.44

1.257.25 1.133.75 2.25 3.25

15.31 4.5 2.514.88 30 14.12 15.44

FIGURE 1

Unit Dimensions

Manual 2100-630A
Page 9 of 49

CAUTION

During the initial ring of the burners there will probably be some amount of smoke issued to the
circulating air stream as the result of residual oil burning off of the heat exchanger tubes. This oil
is required during the forming process of the stainless steel heat exchanger tubes to facilitate the
bending. OSHA or the National Toxicology Program does not list the oil as a carcinogen. In vapor
form this may be irritating to the eyes or could cause headaches. This is a one-time occurrence, and
ventilation of the space may be required depending upon the space being conditioned.

1. IMPORTANT

The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians. 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.

2. APPLICATION

This is a fan-assisted forced air gas furnace with electric
air conditioning for outdoor installation. A fan-assisted
furnace is equipped with an integral mechanical means
to draw products of combustion through the combustion
chamber and heat exchanger. The furnace installation
must conform with local building codes and ordinances
or, in their absence, with the National Fuel Gas Code
ANSI Z223.1 or CAN/CGA-B149.1, latest edition,
and the National Electrical Code ANSI/NFPA-7 or CSA
C22.1, latest edition. It is the personal responsibility
and obligation of the purchaser to contact a qualified
installer to assure that installation is adequate and is in
conformance with governing codes and ordinances.

3. DUCT WORK

The unit is designed for use with or without duct work
(see WARNING). Flanges are provided for attaching
the supply and return ducts. These instructions
explain the recommended method to install the air
cooled self-contained electric air conditioning and
gas heating unit and the electrical wiring connections
and gas piping to the unit. The refrigerant system is
completely assembled and charged. All internal wiring
is complete.

These instructions and any instructions packaged with
any separate equipment required to make up the entire
heating/cooling system should be carefully read before
beginning the installation. Note particularly “Starting
Procedure” and any tags and/or labels attached to the
equipment.

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.

Refer to Tables 10, 11, 12, 13, 14 and 15 for maximum
static pressure available for duct design.

WARNING

In all cases, there must be a metal duct

connection made to the supply air ange, and a 1"

clearance to combustibles must be maintained to
this duct connection.

For free blow applications, a metal sleeve must be

used in the wall opening itself, again maintaining
a 1" clearance to combustibles.

Failure to use the sheet metal can cause re
resulting in property damage, injury, or death.

See Figure 3 and clearance information in Section 9
and Table 2 for additional information.

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" clearance to combustible material for the first 3' of
duct attached to the outlet air frame is required. See
Wall Mounting Instructions and Figures 2, 2A, 3 and
3A 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 the 5/8" louver criteria may
be used. It is recommended that Bard Return Air Grille
or Return Filter Grille 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.

Manual 2100-630A
Page 10 of 49

4. HIGH ALTITUDE APPLICATIONS

8. MOUNTING THE UNIT

Ratings of gas utilization equipment are based on
sea level operation and need not be changed for
operation at elevations up to 6,000'. For operation at
elevations above 6,000' and in the absence of specific
recommendations from the local authority having
jurisdiction, equipment ratings shall be reduced as
specified in Section 21.

5. TRANSPORTATION DAMAGE

All units are packed securely in shipping containers.
All units should be carefully inspected upon arrival for
damage. In the event of damage, the consignee should:

1.

Note on delivery receipt of any damage to container.

2. Notify carrier promptly, and request an inspection.

3. In case of concealed damage, the carrier must be
notified as soon as possible within 15 days after
delivery.

4. Claims for any damage, apparent or concealed,
should be filed with the carrier, using the following
supporting documents:

A. Original Bill of Lading, certified copy or

indemnity bond.

B. Original paid freight bill of indemnity in lieu

thereof.

C.

D. Copy of the inspection report issued by

Original invoice or certified copy thereof showing
trade and other discounts or deductions.

carrier’s representative at the time damage is
reported to carrier.

6. GENERAL INFORMATION

1. These units are secured by wall mounting brackets
which secure the unit to the outside wall surface at
both sides. A bottom mounting bracket is provided
for ease of installation but is not required.

CAUTION

If the bottom bracket is used, be certain the
bracket is secured to the outside wall surface
in a way sufcient to support the entire
weight of the unit during installation until side
mounting brackets are secured.

The W42G, W48G and W60G models are suitable

2.
for 0 clearance on the installation mounting wall and
to the top. For all models the supply air duct flange
and the first 3’ of supply air duct require a minimum
of 1” clearance to combustible material. The W24G,
W30G and W36G models are suitable for 0 clearance
on the installation mounting wall, but require 1”
clearance to the top if combustible material overhang
projects above the unit (see Figures 3 and 3A). If
a combustible wall, use a minimum of Figure 1 “A”
dimension plus 2” and “B” dimension plus 2”. See
Figures 4 and 5 for details.

WARNING

Failure to provide the one inch clearance
between the supply duct and a combustible

surface for the rst three feet of duct can result
in re causing damage, injury or death.

Size of unit for proposed installation should be based
on heat loss/heat gain calculations 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.

7. WALL MOUNTING INFORMATION

1.

Two holes for the supply and return air openings
must be cut through the wall as detailed in Figure 4.

2. On wood-frame walls, the wall construction must
be strong and rigid enough to carry the weight of
the unit without transmitting any unit vibration.

3. Concrete block walls must be thoroughly inspected
to insure that they are capable of carrying the
weight of the installed unit.

3. Locate and mark lag bolt locations and bottom
mounting bracket location.

4. Mount bottom mounting bracket.

5. Hook top rain flashing under back bend of top.
Top rain flashing is shipped secured to the right
side of the back.

6. Position unit in opening and secure with 5/16
lag bolts; use 7/8” diameter flat washers on the
lag bolts. Use lag bolts long enough to support
the unit’s weight when mounted to the structure.
This length may be dependant on the type of
construction.

7. Secure rain flashing to wall and caulk across entire
length of top (see Figure 3).

8.

On side-by-side installations, maintain a minimum of
20” clearance on right side to allow access to control
panel and burner compartment, and to allow proper
airflow to the outdoor coil. Additional clearance may
be required to meet local or national codes.

Manual 2100-630A
Page 11 of 49

39 3/16"

29 3/4"

4 11/16"

12"

12"

12"

12"

12"

12"

2"

2 1/4"

10"

28 5/16"

15"

27"

17 15/16"

11 5/16"

8 5/8"

2 15/16"

2 1/4"

30"

29"

5 1/16"

7/16"

5 9/16"

4 9/16"

4 1/2"

2 15/16"

18 15/16"

4 9/16"

SUPPLY

AIR DUCT

RETURN

AIR DUCT

Ø2 3/4" GAS

OPENING

(OPTIONAL)

Ø2 3/4" HIGH

VOLTAGE

(OPTIONAL)

Ø2" LOW VOLTAGE

(OPTIONAL)

(12) FLANGE

SCREWS

UNIT SUPPORT

1" MIN.

NECCESSARY

NO CLEARANCE

SUPPLY

AIR DUCT

RETURN

AIR DUCT

CONTROL

PANEL

VESTIBULE

DOOR

WALL

STRUCTURE

(OUTSIDE)

1" CLEARANCE ON ALL

FOUR SIDES OF SUPPLY

AIR DUCT IS REQUIRED FROM

COMBUSTABLE MATERIALS

NOTE: IT IS RECOMMENDED THAT A BEAD

OF SILICONE CAULKING BE PLACED BEHIND

THE SIDE MOUNTING FLANGES AND UNDER

TOP FLASHING AT TIME OF INSTALLATION

RIGHT SIDE

VIEW WITH UNIT

OUTSIDE WALL WITH

UNIT REMOVED

RAIN FLASHING

SUPPLIED

SEAL WITH BEAD OF CAULKING

ALONG ENTIRE LENGTH OF TOP

TOP

FOAM AIR SEAL

WALL

MIS-1681

FIGURE 2

Mounting Instructions

for W24G, W30G and W36G

Manual 2100-630A
Page 12 of 49

FIGURE 2A

Mounting Instructions

for W42G, W48G and W60G

Manual 2100-630A
Page 13 of 49

FIGURE 3

Combustible Clearance

for W24G, W30G and W36G Models

FIGURE 3A

Combustible Clearance

for W42G, W48G and W60G Models

WARNING

A minimum of one (1) inch clearance must be maintained between the supply air duct and combustible materials.

This is required for the rst three (3) feet of ducting.

It is important to insure that the one (1) inch minimum spacing is maintained at all points.

Failure to do this could result in overheating the combustible material and may result in a re causing damage,
injury or death.

Manual 2100-630A
Page 14 of 49

FIGURE 4

Wall Mounting Instructions

FIGURE 5

Wall Mounting Instructions

Manual 2100-630A
Page 15 of 49