Bard WG3S2-A, WG4S2-A, WG5S2-A, WG3S2-B, WG4S2-B Installation Instructions Manual

INSTALLATION INSTRUCTIONS

WALL MOUNTED GAS/ELECTRIC

Models:

WG3S2-A
WG4S2-A
WG5S2-A

WG3S2-B
WG4S2-B
WG5S2-B

WG3S2-C
WG4S2-C
WG5S2-C

WARNING

READ ALL INSTRUCTIONS CAREFULLY BEFORE
BEGINNING THE INST ALLATION.

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.

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 : 2100-587J
Supersedes: 2100-587I
Date: 8-29-18

Page 1 of 58

CONTENTS

Page

Getting Other Information and Publications ... 4

Wall Mount Gas/Electric General Information

WG Series Model Nomenclature ........................... 5

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

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

Installation ..............................................................9

1. Important ....................................................... 9

2. Application ..................................................... 9

3. Duct Work ....................................................... 9

4. High Altitude Applications ................................ 9

5. Transportation Damage ................................... 10

6. General Information ....................................... 10

7. Wall Mounting Information ............................. 10

8. Mounting the Unit ......................................... 10

9. Clearances .................................................... 16

10. Vent Terminal and Combustion Air Inlet Hood ... 17

11. Optional Vertical Venting ................................ 17

12. Vent Resizing Instructions .............................. 18

13. Fresh Air Intake ............................................. 18

14. Condensate Drain .......................................... 18

15. Wiring – Main Power ...................................... 18

16. Wiring – Low Voltage Wiring ............................ 20

17. Thermostats .................................................. 20

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 ................................................ 31

23. Measuring Air Temperature Rise ...................... 31

24. Filters .......................................................... 32

25. Compressor Control Module ............................ 32

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

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

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

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

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

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

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

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

Start Up ..................................................................41

Application ...................................................... 41

Important Installer Note .................................... 41

High and Low Pressure Switch ........................... 41

Three Phase Scroll Compressor .......................... 41

Service ....................................................................42

Compressor Solenoid ........................................ 42

Fan Blade Setting Dimensions ........................... 42

Removal of Fan Shroud ..................................... 42

TM

ECM

34. Pressure Service Ports ................................... 45

35. R-410A Refrigerant Charge ............................ 46

36. Low NOx Burner Assembly "N" Suffix

Models Only – U.S. Installations Only .............. 46

Index – Wiring Diagrams and Ladder Diagrams ....... 47

Wiring Diagrams and Ladder Diagrams ................... 48

Motors .................................................. 43

Manual 2100-587J
Page 2 of 59

Page

FIGURES

Figure 1 Unit Dimensions .................................. 8

Figure 2A Mounting Instructions for WG3S2 ........ 11

Figure 2B Mounting Instructions for WG4S2

and WG5S2 ....................................... 12

Figure 3 Combustible Clearance ....................... 13

Figure 4 Wall Mounting Instructions .................. 14

Figure 5 Wall Mounting Instructions .................. 14

Figure 6 Common Wall Mounting Installations .... 15

Figure 7 Location of Vent Terminal in Shipping .. 16

Figure 8 Vent Terminal and Combustion

Air Intake .......................................... 17

Figure 9 Installation of Flexible Conduit ............ 19

Figure 10A Low Voltage Wiring – No Vent .............. 21

Figure 10B Low Voltage Wiring – CRV .................... 22

Figure 10C Low Voltage Wiring – Economizer ......... 23

Figure 10D Low Voltage Wiring – ERV .................... 24

Figure 11 Gas Pipe Connection ........................... 25

Figure 12 Proper Piping Practice ........................ 26

Figure 13 Access Internal Filter .......................... 32

Figure 14 8201-164 Compressor Control Module . 33
Figure 15 Lighting and Shutdown Instruction

Label ................................................ 35

Figure 16 Top View of Gas Control ...................... 36

Figure 17 Sequence of Operation – Electronic

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

Figure 18 Furnace Control Board and

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

Figure 19 Fan Blade .......................................... 42

Figure 20 Control Disassembly ........................... 44

Figure 21 Winding Test ...................................... 44

Figure 22 Drip Loop .......................................... 44

Figure 23 Low NOx Insert .................................. 46

Page

TABLES

Table 1 Specifications ........................................ 7

Table 2 Minimum Installation Clearances ........... 16

Table 3 Thermostat Wire Size ............................ 20

Table 4 Wall Thermostat ................................... 20

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 .....................30

Table 9 Indoor Blower Performance ................... 39

Table 10 Integrated Furnace and Blower

Control Operation ................................. 40

Table 11 Fan Blade Dimensions .......................... 42

Table 12 Cooling Pressures ................................. 45

Manual 2100-587J
Page 3 of 59

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

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

Winter and Winter Air Conditioning and Equipment
Selection

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

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]

CSA Canadian Standards Association

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

Canadian Installation Code ................. CAN/CGA B149

BARD MANUFACTURING COMPANY, INC.

BRYAN, OHIO 43506 USA

Manual 2100-587J
Page 4 of 59

WALL MOUNT GAS/ELECTRIC GENERAL INFORMATION

MODEL NUMBER NOMENCLATURE

WG 4 S 2 – A X C X X X X X X

MODEL

Wall Mount
Gas/Electric

COOLING
CAPACITY

3 = 3 ton
4 = 4 ton
5 = 5 ton

Denotes Step
Capacity

FEATURE

(-) = Standard
(C) = Canada

REVISION

VENT

See Table Below)

(

VOLTAGE

A = 230/208-60-1
B = 230/208-60-3
C = 460-60-3

FILTER

EMISSIONS

X = Standard
N = NOx Certified

HEATING INPUT

A = 50,000
B = 75,000
C = 100,000
D = 125,000*

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

X = 2˝ Pleated (Standard)
W = 1˝ Washable

VENTILATION OPTIONS

COLOR

X = Beige
(Standard)
4 = Buckeye 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 = To p

Description

Factory Installed

Code No.

Field Installed

Part No.

Blank-Off Plate B WGSBOP-5

Commercial Ventilator – Multiple Position V WGSCRVMP-5

Economizer – Fully Modulating 

E WGSEIFM-5

Energy Recovery Ventilator – 230 Volt R WGSERV-A5A

Energy Recovery Ventilator – 460 Volt R WGSERV-C5A

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

Manual 2100-587J
Page 5 of 59

AIR CONDITIONING MODULE OPTIONS

CCM



STD STD STD X N/A

STD STD STD -- H CMA-28

STD = Standard equipment

HPC



LPC



LAC



Factory Installed

Code

Field Installed

Part

 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

.

 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.

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.

Manual 2100-587J
Page 6 of 59

TABLE 1

SPECIFICATIONS

Models WG3S2-A WG3S2-B WG3S2-C WG4S2-A WG4S2-B WG4S2-C WG5S2-A WG5S2-B WG5S2-C

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

Minimum Circuit Ampacity 27 23 12 36 27 14 45 31 15

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

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

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

** Delay Fuse – Max. 40 30 15 45 40 20 60 45 20

Compressor

Compressor Type Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll

Volts 230/208 230/208 460 230/208 230/208 460 230/208 230/208 460

Rated Load Amps 11.6/12.9 8.8/9.9 6.7 15.0/17.8 10.4/11.8 5.4 20.9/23.0 12.8/14.1 6.2

Branch Circuit Selection Current 15.3 11.7 5.8 21.2 14.1 6.5 27.2 16.5 7.2

Lock Rotor Amps 83 73 38 104 83 41 153 110 52

Fan Motor – HP/RPM/SPD 1/3-850-2 1/3-850-2 1/3-850-1 1/3-850-2 1/3-850-2 1/3-850-1 1/3-850-2 1/3-850-2 1/3-850-1

Blower Motor – Amps 2.5 2.5 1.3 2.5 2.5 1.3 2.5 2.5 1.3

Fan Motor and Compressor

Fan – DIA/CFM 24" – 2700 24" – 2700 24" – 2700 24" – 2700 24" – 2700 24" – 2700 24" – 2700 24" – 2700 24" – 2700

Blower Motor – HP/RPM/SPD 1/2 Variable 1/2 Variable 1/2 Variable 3/4 Variable 3/4 Variable 3/4 Variable 3/4 Variable 3/4 Variable 3/4 Variable

Blower Motor – Amps 3.6 3.6 3.6 4.7 4.7 4.7 6.0 6.0 6.0

Motor and Evaporator

CFM Cooling and E.S.P. 1100 1100 1100 1500 1500 1500 1700 1700 1700

Filter Sizes (Inches) 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

Charge (R-410A) 156 156 156 240 240 240 246 246 246

* 75° C Copper wire size

** Maximum time delay fuse or circuit breaker

Manual 2100-587J
Page 7 of 59

R

41.63

43.38

13.75

34.9

S

S

S

S

S

T

3.75

2.514.88 30 14.12 15.44 42.8815.31

4.5

FIGURE 1

Unit Dimensions

0.44

1.257.25 1.13

3.25 2.75

12.19 10 40.25

2.253.88 42 17.34 8.44

MIS-3240 A

B

O

B

E

EE

SUPPLY OPENING

BB

RETURNOPENING

BACK

CC

II

Q

GAS

ENTRANCES

X

AA

LOW VOLTAGE

Y

ENTRANCES

ENTRANCES

HIGH VOLTAGE

V

H

FF

GG

HH

A

I

U

Z

M

C

L

KJ

DD

D

CONDENSER

AIRINLETS

RIGHT SIDE

43.81

9.88 29.88 15.88 27.25

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

WG3S2 31.63 87.5 33.38 28.75

Manual 2100-587J
Page 8 of 59

P

N

VESTIBULE

DOOR

4 DEG. PITCHINTOP

16

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

WG3S2 3.75 24.9

W

COMBUSTION

AIRINTAKE

COMBUSTION

AIREXHAUST

FRONTDOOR

FILTER

SERVICE

DOOR

CIRCUITBREAKER/

DISCONNECT ACCESS

PANELDOOR

CONTROL

F

PANEL

VENTOPTION

PANEL(LOCKABLE)

AIROUTLET

CONDENSER

FRONT

G

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 on this page). 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 Table 9 in this Manual for maximum static
pressure available for duct design.

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 1" of insulation. Use

INSTALLATION

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.

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.

4. HIGH ALTITUDE APPLICATIONS

Ratings of gas utilization equipment are based on
sea level operation and need not be changed for

’

operation at elevations up to 6,000

’

elevations above 6,000
recommendations from the local authority having
jurisdiction, equipment ratings shall be reduced as
specified in Section 21.

and in the absence of specific

. For operation at

Manual 2100-587J
Page 9 of 59

5. TRANSPORTATION DAMAGE

8. MOUNTING THE UNIT

All units are packed securely in shipping container.
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. Original invoice or certified copy thereof

showing trade and other discounts or
deductions.

D. Copy of the inspection report issued by

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

6. GENERAL INFORMATION

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.

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.

2. The WG3S2, WG4S2 and WG5S2 models are
suitable 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.

WARNING

Failure to provide the 1" clearance between the
supply duct and a combustible surface for the
rst 3' of duct can result in re causing damage,
injury or death.

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.

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.

Manual 2100-587J
Page 10 of 59

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.

FIGURE 2A

Mounting Instructions for WG3S2

Manual 2100-587J
Page 11 of 59

FIGURE 2B

Mounting Instructions for WG4S2 and WG5S2

Manual 2100-587J
Page 12 of 59

FIGURE 3

Combustible Clearance

WARNING

A minimum of 1" clearance must be maintained between the supply air duct and combustible materials. This is

required for the rst 3' of ducting.

It is important to insure that the 1" 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 2100-587J
Page 13 of 59

FIGURE 4

Wall Mounting Instructions

FIGURE 5

Wall Mounting Instructions

Manual 2100-587J
Page 14 of 59

FIGURE 6

Common Wall Mounting Installations

Manual 2100-587J
Page 15 of 59

9. CLEARANCES

Minimum clearances, as specified in Table 2, must
be maintained from adjacent structures to provide
adequate fire protection, adequate combustion air and
room for service personnel.

While minimum clearances are acceptable for safety
reasons, they may not allow adequate air circulation
around the unit for proper operation in the cooling
mode. Whenever possible, it is desirable to allow
additional clearance, especially around the condenser
inlet and discharge openings. DO NOT install the unit
in a location that will permit discharged air from the
condenser to recirculate to the condenser inlet.

WARNING

Clearances from combustible materials
must be maintained as specied. Failure to
maintain clearances could cause re resulting
in property damage, injury, or death.

TABLE 2

Minimum Installation Clearances

Outlet Duct

(from combustible materials)

Vent Terminal

(from combustible materials)

Condenser Inlet 20"

Top See Figure 3

Burner Service 20"

Combustible Base (Wood or Class A,

B or C roof covering material)

* See Figure 3

1" first 3'

* 17"

0"

FIGURE 7

Location of Vent Terminal in Shipping

Manual 2100-587J
Page 16 of 59

10.

VENT TERMINAL AND COMBUSTION
AIR INLET HOOD

The vent terminal is shipped in the burner
compartment (see Figure 7). Remove the two shipping
screws and separate the two-piece assembly. Install
the vent terminal by using the four screws provided.
Make sure gasket is in place (see Figure 8). The
combustion air intake hood is factory installed.

11. OPTIONAL VERTICAL VENTING

With the optional vertical venting kit (VVK-5), this unit
may be vented vertically through a roof or overhang.
The kit includes a stainless steel transition drain tee,
silicone sealant and drain tubing.

If unit is installed with vertical vent kit, annually
inspect the vent system and drain. Replace any portion
of the vent system that shows signs of deterioration.
Make sure drain is open and free of obstruction.

CAUTION

Vent terminal must be installed as shown in Figure 8 for proper operation of the heating system.

NOTE: The inner vent hood gasket is designed to stretch over and seal around the combustion

air blower outlet. This is a very critical seal to prevent water and ue products from entering the

unit. Care must be taken to insure this gasket is in place and sealing properly.

FIGURE 8

Vent Terminal and Combustion Air Intake

Manual 2100-587J
Page 17 of 59

12. VENT RESIZING INSTRUCTIONS

When an existing furnace is removed from a venting
system servicing other appliances, the venting system
is likely to be too large to properly vent the remaining
attached appliances.

The following steps shall be followed with each of
the appliances remaining connected to the common
venting system, placed in operation one at a time
while the other appliances remaining connected to the
common venting system are not in operation.

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and
horizontal pitch, as required in the National
Fuel Gas code, ANSI Z223.1 or the CAN/CGA
B149 Installation Codes and these instructions.
Determine that there is no blockage or restriction,
leakage, corrosion and other deficiencies which
could cause an unsafe condition.

3. In so far as is practical, close all building doors
and windows and all doors between the space
in which the appliance(s) connected to the
venting system are located and other spaces of
the building. Turn on clothes dryers and any
appliances not connected to the venting system.
Turn on any exhaust fans, such as range hoods
and bathroom exhausts, so they will operate
at maximum speed. Do not operate a summer
exhaust fan. Close fireplace dampers.

4. Follow the lighting instructions. Place the
appliance being inspected in operation. Adjust
thermostat so appliance shall operate continuously.

5. Test for draft hood equipped appliance spillage at
the draft hood relief opening after 5 minutes of
main burner operation. Use the flame of a match
or candle.

6. After it has been determined that each appliance
connected to the venting system properly vents
when tested as outlined above, return doors,
windows, exhaust fans, fireplace dampers and
any other gas-burning appliances to their previous
conditions of use.

7. If improper venting is observed during any of the
above tests, the venting system must be corrected.

13. FRESH AIR INTAKE

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

The default unit is built with blank-off plates
installed. 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.

One of several other ventilation options may be
installed. Refer to model number and/or supplemental
installation instructions.

14. 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.

15. WIRING – MAIN POWER

WARNING

For your personal safety, turn off electric
power at service entrance panel before
making any electrical connections. Failure to
do so could result in electric shock or re.

Refer to 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. 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.

The unit rating plate lists a “Maximum Time Delay
Relay 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 “Start Up” section for important information on
three phase scroll compressor start ups.

Manual 2100-587J
Page 18 of 59