INSTALLATION
INSTRUCTIONS
MULTI-POSITION
GAS-FIRED FURNACES
COMMERCIAL BELT DRIVE
UPFLOW / HORIZONTAL MODELS: P4HUE30N13006
130 MBH OUTPUT
CONTENTS
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
UNIT INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
VENTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
UPFLOW APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
HORIZONTAL APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . 9
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ELECTRICAL POWER CONNECTION . . . . . . . . . . . . . . . . . . . 11
ELECTRICAL CONTROL CONNECTIONS . . . . . . . . . . . . . . . 12
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TSTART-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . 14
ACCESSORY CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 16
OPERATION AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . 18
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
HORIZONTAL (WITHOUT FILTER) . . . . . . . . . . . . . . . . . . . . . 22
FILTER PERFORMANCE-PRESSURE DROP
INCHES W.C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
START TO INSTALL YOUR FURNACE.
SAVE THIS MANUAL
035-17443-000 Rev. A (800)
035-17443-000 Rev. A (800)
CONTENTS
WARNING
IMPROPER INSTALLATION MAY CREATE A
CONDITION WHERE THE OPERATION OF THE
PRODUCT COULD CAUSE PERSONAL INJURY
OR PROPERTY DAMAGE.
IMPROPER INSTALLATION, ADJUSTMENT,
ALTERATION, SERVICE OR MAINTENANCE
CAN CAUSE INJURY OR PROPERTY DAMAGE.
REFER TO THIS MANUAL FOR ASSISTANCE
OR ADDITIONAL INFORMATION, CONSULT A
QUALIFIED INSTALLER, SERVICE AGENCY OR
THE GAS SUPPLIER.
CAUTION
THIS PRODUCT MUST BE INSTALLED IN
STRICT COMPLIANCE WITH THE ENCLOSED
INSTALLATION INSTRUCTIONS AND ANY
APPLICABLE LOCAL, STATE, AND NATIONAL
CODES INCLUDING BUT NOT LIMITED TO,
BUILDING, ELECTRICAL AND MECHANICAL
CODES.
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOTES, CAUTIONS & WARNINGS . . . . . . . . . . . . . . . . . . . .
LIMITATIONS AND LOCATION . . . . . . . . . . . . . . . . . . . . . . .
3
3
3
3
3
UNIT INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMBUSTION AIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Source from Outdoors . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Combustion and Ventilation Considerations . . . . . .
Specially Engineered Installations . . . . . . . . . . . . . . . . . . . .
Combustion Air Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4
4
5
5
5
VENTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CATEGORY 1 - VERTICAL VENTING . . . . . . . . . . . . . . . . . .
CATEGORY 1 - 450 F. MAX. VENT TEMP. . . . . . . . . . . . . .
HORIZONTAL SIDEWALL VENTING . . . . . . . . . . . . . . . . . .
VENT SAFETY CHECK PROCEDURE . . . . . . . . . . . . . . . . .
7
7
7
7
7
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
UPFLOW APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SUPPLY PLENUM CONNECTION . . . . . . . . . . . . . . . . . . . .
Return Duct Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FILTER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bottom Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
8
8
8
9
HORIZONTAL APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SUPPLY PLENUM CONNECTION . . . . . . . . . . . . . . . . . . . . 9
ATTIC INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CRAWL SPACE INSTALLATION . . . . . . . . . . . . . . . . . . . . 10
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ELECTRICAL POWER CONNECTION . . . . . . . . . . . . . . . . . . . . 11
FURNACE CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . 11
BLOWER MOTOR CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . 11
ELECTRICAL CONTROL CONNECTIONS . . . . . . . . . . . . . . . . . 12
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
WARNING
The furnace area must not be used as a broom
closet or for any other storage purposes, as a fire
hazard bay be created. Never store items such as
the following on, near or in contact with the furnace.
1.
Spray or aerosol cans, rags, brooms, dust mops,
vacuum cleaners or other cleaning tools.
2.
Soap powders, bleaches, waxes or other cleaning
compounds; plastic items or containers; gasoline,
kerosene, cigarette lighter fluid, dry cleaning fluids
or other volatile fluid.
3.
Paint thinners and other painting compounds.
4.
Paper bags, boxes or other paper products
Never operate the furnace with the blower door
removed. To do so could result in serious personal
injury and/or equipment damage.
2
TSTART-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . .
IGNITION SYSTEM CHECKOUT / ADJUSTMENT . . . . . . .
CHECKING GAS INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example - Checking Gas Input . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENT OF MANIFOLD GAS PRESSURE . . . . . . . .
ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . . . . . .
ADJUSTMENT OF FAN-OFF CONTROL SETTINGS . . . . .
14
14
14
14
15
16
16
ACCESSORY CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 16
OPERATION AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . .
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . .
CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTERMITTENT BLOWER - COOLING . . . . . . . . . . . . . . . .
HEATING CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HOT SURFACE IGNITION SYSTEM . . . . . . . . . . . . . . . . . .
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BLOWER CARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BURNER REMOVAL / CLEANING . . . . . . . . . . . . . . . . . . . .
CLEANING THE HEAT EXCHANGER . . . . . . . . . . . . . . . . .
Lower Heat Exchanger Access . . . . . . . . . . . . . . . . . . . . . .
Upper Heat Exchanger Access . . . . . . . . . . . . . . . . . . . . . .
18
18
18
18
18
18
18
18
19
19
19
19
19
20
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FURNACE CONTROL DIAGNOSTICS . . . . . . . . . . . . . . . .
BLOWER PERFORMANCE CFM -UPFLOW/
HORIZONTAL (WITHOUT FILTER) . . . . . . . . . . . . . . . . . . . . . . .
FILTER PERFORMANCE-PRESSURE DROP
INCHES W.C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
20
22
23
24
Unitary Products Group
035-17443-000 Rev. A (800)
GENERAL INFORMATION
DESCRIPTION
This Category I furnace is designed for installation in a residential or commercial application. A Category 1 furnace has
a fan assisted combustion system equipped with an integral
mechanical means to draw products of combustion through
the combustion chamber and heat exchanger. It may be
installed in a basement, garage, equipment room, alcove,
attic or any other indoor location where all required clearances to combustibles and other restrictions are met. It is
designed for natural gas-fired operation, but may be converted to propane (LP) using the INP0349 kit.
High altitude and propane (LP) changes or conversions
required in order for the appliance to satisfactorily meet the
application must be made by an authorized distributor: in
Canada, a certified conversion station or other qualified
agency, using factory specified and/or approved parts.
WARNING
Each furnace in this series is a Category I furnace,
suitable for common venting with other gas-fired
appliances as allowed by the National Fuel Gas
Code, NFPA 54/ANSI Z223.1-latest edition.
This appliance is not to be used for temporary
heating of buildings or structures under construction.
Do not install this furnace in a corrosive or contaminated atmosphere.
Do not install this furnace in a mobile home or recreational vehicle.
Furnaces shall not be installed directly on carpeting, tile or other combustible material other than
wood flooring.
This furnace may be used only as a Category 1 unit.
The furnace must be installed so that all electrical components are protected from water.
INSPECTION
As soon as a unit is received, it should be inspected for possible damage during transit. If the damage is evident, the
extent of the damage should be noted on the carrier’s freight
bill.
A separate request for inspection by the carrier's agent
should be made in writing. Also, before installation, the unit
should be checked for belt, screws or bolts which may have
loosened in transit.
Continuous return air temperature must not be
below 55 °F (13 °C).
Use only the type of gas approved for this furnace; refer to
the furnace rating plate.
WARNING
Only use natural gas in furnaces designed for natural gas. Only use propane (LP) gas for furnaces
that have been properly converted to use propane
(LP) gas. Do not use this furnace with butane.
Using wrong gas could create a hazard, resulting
in damage, injury or death.
NOTES, CAUTIONS & WARNINGS
The installer should pay particular attention to the words:
NOTE, CAUTION and WARNING. NOTES are intended to
clarify or make the installation easier. CAUTIONS are given
to prevent equipment damage. WARNINGS are given to alert
the installer that personal injury and/or equipment or property
damage may occur if installation procedures are not handled
properly.
For installations above 2,000 feet, reduce input 4% for each
1,000 feet above sea level. Canadian installations must be
derated 10% for elevations from 2,000 ft. to 4,500 ft. Use
1PS0301 kit to properly derate this furnace.
The furnace shall not be connected to a chimney flue serving
a separate appliance designed to burn solid fuel.
LIMITATIONS AND LOCATION
Check the rating plate and power supply to be sure that electrical characteristics match. All models are factory wired for
208 / 230 VAC, 1 phase, 60 Hertz power supply.
This furnace should be installed in accordance with all
national / local building / safety codes and requirements, or in
the absence of local codes, with the National Fuel Gas Code,
ANSI Z223.1 - (latest edition) or, in Canada, CAN/CGA
B149.1 or.2 - (latest edition), and other applicable codes.
A furnace installed in a residential garage must be located so
that all burners and burner ignition devices are located no
less than 18" above the garage floor, and located or protected to prevent damage by vehicles.
Unitary Products Group
3
035-17443-000 Rev. A (800)
The size of the unit should be based on an acceptable heat
loss calculation for the structure. ACCA, Manual J or other
approved methods may be used. (See Table 3 on page 6).
Rooms communicating directly with the space containing the
appliances are considered part of the unconfined space, if
openings are not furnished with doors.
The furnace should be located using these guidelines:
A confined space is an area with less than 50 cubic feet per
1000 Btu/hr input rating for all appliances installed in that
area.
1.
Where a minimum amount of vent piping and elbows will
be required.
2.
As centralized with the air distribution as possible.
3.
Where adequate combustion air will be available.
4.
In an area where ventilation facilities provide for safe limits of ambient temperature under normal operating conditions.
The following must be considered to obtain proper air for
combustion and ventilation in confined spaces.
Air Source from Inside the Building
5.
Where it will not interfere with proper air circulation in the
confined space.
6.
Where the vent will not be blocked or restricted.
7.
Where sufficient space is provided to allow proper service access. Minimum recommended service clearances
are as follows:
Twenty-four (24) inches between the front of the furnace
and an adjacent wall or another appliance, when access
is required for servicing and cleaning.
Two permanent openings, one within 12 inches of the top of
the confined space and one within 12 inches of the bottom,
shall each have a free area of not less than one square inch
per 1,000 Btuh of total input rating of all appliances located in
the space. The openings shall communicate freely with interior areas having adequate infiltration from the outside.
NOTE: At least 100 square inches free area shall be used for
each opening.
Air Source from Outdoors
1.
Eighteen (18) inches at the side where access is
required for passage to the front for servicing, inspection
or replacement of flue / vent connections.
Two permanent openings, one within 12 inches of the
top of the confined space and one within 12 inches of the
bottom, shall communicate directly, or by means of
ducts, with the outdoors or to such crawl or attic spaces
that freely communicate with the outdoors.
a.
8.
Where it will not interfere with the cleaning, servicing or
removal of other appliances.
9.
Where the following minimum clearances (in inches) to
combustibles can be maintained: Table 1 on page 5.
Vertical Ducts - Each opening must have a free
area of not less than one square inch per 4,000 Btuh
of total input of all appliances located in the space.
EXAMPLE:
Total Input of All Appliances
UNIT INSTALLATION.
= Square Inches Free Area
4000
CAUTION
Remove blower shipping support, located under
blower assembly, only after unit has been positioned for installation or damage may occur.
COMBUSTION AIR
All installations must comply with Section 5.3, Air for Combustion and Ventilation of the National Fuel Gas Code, ANSI
Z223.1 or Sections 7.2, 7.3 or 7.4 of CAN/CGA B149.1 or.2
Installation Code - latest editions.
An unconfined space is not less than 50 cubic feet per 1000
Btu/hr input rating for all appliances installed in that area.
b.
NOTE: Ducts must have the same cross-sectional area as
the free area in the opening to which they are connected. The
minimum dimension of rectangular ducts shall be three
inches.
2.
One permanent opening, commencing within 12 inches
of the top of the enclosure shall be permitted where the
equipment has clearances of at least 1 inch from the
sides and back and 6 inches from the front of the appliance. The opening shall communicate through a vertical
or horizontal duct to the outdoors, or spaces (crawl or
attic) that freely communicate with the outdoors and shall
have a minimum free area of:
a.
4
Horizontal Ducts - Each opening must have a free
area of not less than one square inch per 2,000 Btuh
of total input of all appliances located in the space.
1 sq. in. per 3000 Btu per hr of the total input rating
of all equipment located in the enclosure.
Unitary Products Group
035-17443-000 Rev. A (800)
TABLE 1: UNIT CLEARANCES TO COMBUSTIBLES (ALL DIMENSIONS ARE IN INCHES)
ALL SURFACES IDENTIFIED WITH THE UNIT IN AN UPRIGHT CONFIGURATION
APPLICATION
TOP
FRONT
REAR
LEFT
SIDE
RIGHT
SIDE
FLUE
FLOOR /
BOTTOM
CLOSET
ALCOVE
ATTIC
LINE
CONTACT
UPFLOW / HORIZONTAL MODELS - UPFLOW APPLICATION
UPFLOW
1
6
0
0
3
6
COMBUSTIBLE
YES
YES
YES
NO
UPFLOW B-VENT
1
3
0
0
0
1
COMBUSTIBLE
YES
YES
YES
NO
UPFLOW / HORIZONTAL MODELS - HORIZONTAL APPLICATION
HORIZONTAL
1
6
0
0
3
6
COMBUSTIBLE
NO
YES
YES
YES1
HORIZONTAL
B-VENT
1
3
0
0
0
1
COMBUSTIBLE
NO
YES
YES
YES1
1.
b.
3.
Line contact only permitted between lines formed by the intersection of the rear panel and side panel (top in horizontal position) of
the furnace jacket and building joists, studs or framing.
Not less than the sum of the areas of all vent connectors in the confined space.
Louvers, Grilles and Screens
a.
In calculating free area, consideration must be given
to the blocking effects of louvers, grilles and
screens.
If the free area of a specific louver or grille is not known, refer
to Table 2 to estimate free area.
Combustion Air Quality
The recommended source of combustion air is to use the outdoor air supply. Excessive exposure to contaminated combustion air will result in safety and performance related
problems. However, the use of indoor air in most applications
is acceptable, except as follows:
1.
If the furnace is installed in a confined space it is recommended that the necessary combustion air come from
the outdoors by way of attic, crawl space, air duct or
direct opening.
2.
If outdoor combustion air is used, there must be no exposure to the installations or substances listed in #3 below.
3.
The following types of installations may require OUTDOOR AIR for combustion, due to chemical exposure.
TABLE 2: ESTIMATED FREE AREA
Wood or Metal
Louvers or Grilles
Metal 60% - 70%1
Wood 20-25%
Screens2
1/4 in. mesh or larger 100%
1.
Do not use less than 1/4 in. mesh
2.
Free area of louvers and grilles varies widely; installer
should follow louver or grille manufacturer’s instructions.
NOTE: If mechanically operated louvers are used, a means
to prevent main burner ignition and operation must be
provided should louvers close during startup or operation.
Special Combustion and Ventilation Considerations
Operation of a mechanical exhaust, such as an exhaust fan,
kitchen ventilation system, clothes dryer or fireplace may create conditions requiring special attention to avoid unsatisfactory operation of gas appliances.
Specially Engineered Installations
The above requirements shall be permitted to be waived
where special engineering, approved by the authority having
jurisdiction, provides an adequate supply of air for combustion, ventilation and dilution of flue gases.
Unitary Products Group
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
n.
o.
p.
q.
r.
Commercial buildings
Buildings with indoor pools
Furnaces installed in laundry rooms
Furnaces installed in hobby or craft rooms
Furnaces installed near chemical storage areas
Permanent wave solutions
Chlorinated waxes and cleaners
Chlorine based swimming pool chemicals
Water softening chemicals
De-icing salts or chemicals
Carbon tetrachloride
Halogen type refrigerants
Cleaning solvents (such as perchloroethylene)
Printing inks, paint removers, varnishes, etc.
Hydrochloric acids
Cements and glues
Antistatic fabric softeners for clothes dryers
Masonry acid washing chemicals
5
035-17443-000 Rev. A (800)
FIGURE 1:
DIMENSIONS
4
4
31
(Vent Connection)
See Note
19-1/4
3/4
13-3/4
4"
POWER WIRING
7/8" HOLE
9 1/4
2-1/2
43-1/2
GAS INLET
1-1/4" X 2-1/2"
2 1/2
ACCESS
WIRING
7/8" K.O.
2
14
35-1/2
OPTIONAL SIDE
RETURN CUT-OUT
(EITHER SIDE)
23-1/2
16
2-1/4
1-1/8
32-1/4
28-1/2
FRONT
LEFT SIDE
RIGHT SIDE
T'STAT WIRING
7/8" K.O.
31
19-1/4
32-1/4
30-1/4
Vent Connection
(vent size - see note)
28-1/2
4
26-1/2
3-3/4
19-1/8
TOP IMAGE
(FRONT)
BOTTOM IMAGE
(FRONT)
Note: Vent must be increased to 5” using adaptor provided (7” tall).
All dimensions are in inches and are approximate.
TABLE 3: RATINGS & PHYSICAL/ELECTRICAL DATA
BLOWER
MODEL
P4HUE30N13006
1.
2.
3.
•
•
•
•
6
INPUT
MBH
160
OUTPUT
MBH
130
AFUE1
78
MAX.
NOMINAL
AIR TEMP
OUTLET MOTOR MOTOR
RISE °F
TEMP. °F
AMPS
HP
@230V
25 - 55
150
1-1/2
10
SIZE
TOTAL
UNIT
AMPS
MIN.
WIRE
MAX.
SIZE OPER
OVER(AWG) WGT.
CURRENT @ 75 FT. (LBS)
PROTECT
.
ONE
WAY2
12 x 15
250
208/230 VAC (ONLY)
15
20
12
115 and 208/230 VAC (SPLIT)
6 & 11
15
12
115 VAC (ONLY)3
27
30
10
AFUE numbers are determined in accordance with DOE test procedures.
Wire size and overcurrent protection must comply with the National Electrical Code (ANSI / NFPA-70-latest edition)
Motor must be converted for 115 VAC operation.
For altitudes above 2,000 ft., reduce capacity 4% for each 1,000 ft. above sea level. Refer to Form 650.74-N1.1V.
Wire size based on copper conductors, 60° C, 3% voltage drop.
See Replacement Parts list for LP gas and High Altitude conversion kits. External filter kits (bottom & side) are also available for
models above.
Continuous return air temperatures must not be below 55° F (13° C)
Unitary Products Group
035-17443-000 Rev. A (800)
VENTING
VENT SAFETY CHECK PROCEDURE
WARNING
WARNING
If this furnace is replacing a common-vented furnace, it may be necessary to resize the existing
vent line and chimney to prevent oversizing problems for the new combination of units. Refer to the
National Fuel Gas Code, ANSI Z223.1 or CAN/
CGA B149.1 or .2 Installation Code - latest editions.
It is the responsibility of the installer to verify
proper vent system operation.
CATEGORY 1 - VERTICAL VENTING
Category 1 venting consists of vertically venting one or more
appliances in B-vent or masonry chimney (as allowed), using
single wall metal pipe or B-vent connectors. Type B vent system extends in a general vertical direction and does not contain offsets exceeding 45 degrees, except that a vent system
having not more than one 60-degree offset is permitted.
NOTE: This appliance may be common vented with another
gas appliance as allowed by the following codes and standards.
The following steps shall be followed with each appliance
connected to the venting system placed in operation, while
any other appliances connected to the common venting system are not in operation.
1.
Seal any unused openings in the common venting system.
2.
Inspect 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 or other deficiencies
which could cause an unsafe condition.
3.
Insofar 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 other appliances not connected to the common venting system.
The furnace rating plate lists the maximum vent gas temperature. This temperature must be used to select appropriate
venting materials and clearances. A typical example is shown
below.
CATEGORY 1 - 450 F. MAX. VENT TEMP.
All installations must be vented in accordance with the
National Fuel Gas Code, NFPA 54 / ANSI Z223.1 - latest edition. For reference, the National Fuel Gas Code Handbook,
available from NFPA (item JP-54HB96) is recommended.
The appliance must also be vented in compliance with all
local utility and code requirements. In Canada, the furnace
must be vented in accordance with the National Standard of
Canada, CAN / CGA-B149.1 and.2 - latest editions.
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 operated in operation. Adjust thermostat so appliance will operate continuously at full input rate.
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 appliance
to its previous condition of use.
7.
If improper venting is observed during any of the above
tests, the venting system must be corrected.
8.
Any corrections or resizing of the common venting system must be in accordance with the National Fuel Gas
Code, ANSI Z223.1 or Section 7, Venting Systems and
Air Supply for Appliances, CAN/CGA B149.1 or.2 Installation Code - latest editions. If the common vent system
must be resized, it should be resized to approach the
minimum size as determined using the appropriate
tables in Appendix G of the above codes.
WARNING
A furnace shall not be connected to a chimney flue
serving a separate appliance designed to burn
solid fuel.
This furnace requires the use of a special 4" to 5"
vent adapter. It is provided with the furnace and
must be installed.
HORIZONTAL SIDEWALL VENTING
For applications where vertical venting is not possible, the
only approved method of horizontal venting is through the
use of an auxiliary power venter. Approved power venters are
Fields Controls Model SWG-4Y or Tjernlund Model GPAK-JT.
Follow all application and installation details provided by the
manufacturer of the power venter.
Unitary Products Group
7
035-17443-000 Rev. A (800)
DUCTWORK
The duct system design and installation must:
1.
Handle an air volume appropriate for the served space
and within the operating parameters of the furnace specifications.
2.
Be installed in accordance with standards of NFPA
(National Fire Protection Association) as outlined in
NFPA pamphlets 90A and 90B (- latest editions).
On all installations without a coil, a removable access panel
is recommended in the outlet duct such that smoke or
reflected light would be observable inside the casing to indicate the presence of leaks in the heat exchanger. This
access cover shall be attached in such a manner as to prevent leaks.
Return Duct Connection
Return air must enter the cabinet through the bottom only, or
a bottom and one side. Single or Dual side return only is not
allowed. Return air may not be connected into the rear
panel of the unit. See the specific type application installation for details. Be sure to see the “Filters” section of this
instruction and side-return detail (See Figure 2 ).
3.
Create a closed duct system. The supply system must
be connected to the furnace outlet and the return duct
system must be connected to the furnace inlet. Both supply and return duct systems must terminate outside the
space containing the furnace.
4.
Generally complete a path for heated or cooled air to circulate through the air conditioning and heating equipment and to and from the conditioned space.
All applications require the use of a filter. All filters must be
field supplied and located outside the furnace cabinet in
either a filter rack, duct system or filter grille.
CAUTION
NOTE: All air velocities over 300 feet per minute, require the
use of high velocity filters.
The cooling coil must be installed in the supply air
duct downstream of the furnace.
When the furnace is used in conjunction with a cooling coil,
the coil must be installed parallel with, or in the supply air
side of the furnace to avoid condensation in the primary heat
exchanger.
When a parallel flow arrangement is used, the dampers or
other means used to control air flow must be adequate to prevent chilled air from entering the furnace, and if manually
operated, must be equipped with means to prevent operating
of either unit unless the damper is in the full heat or cool position.
UPFLOW APPLICATIONS
SUPPLY PLENUM CONNECTION
Attach the supply plenum to the furnace
outlet duct connection flanges. This is
typically through the use of S cleat material when a metal plenum is used. The
use of an approved flexible duct connector is recommended on all installations.
This connection should be sealed to prevent air leakage.
FILTER INSTALLATION
The return air return requirements for this furnace consist of:
1.
Bottom Only Return = 536 Ft./Min.
2.
Bottom & Single Side = 390 Ft./Min.
3.
Bottom & Two-Sides = 300 Ft./Min.
CAUTION
All installations must have a filter installed.
The return duct may be attached to the furnace by “S-cleat,”
bend tabs or other approved methods. Be sure to seal the
duct to the furnace to prevent air leakage.
Where the return duct system is not complete, the return connection must run full size to a location outside the utility room,
basement or space where furnace is installed. For further
details, consult Section 5.3 (Air for Combustion and Ventilation) of the National Fuel Gas Code, ANSI Z223.1, or CAN /
CGA B149.1 or.2, Installation Code - latest editions.
NOTE: An external mounted (1SR0302) upflow side-return
accessory kit , which includes an aluminized mesh filter, is
available and is sized to fit the side knockouts on the cabinet.
If a matching cooling coil is used, it may
be placed directly on the furnace outlet
and sealed to prevent leakage. Follow the
coil instructions for installing the supply
plenum.
8
Unitary Products Group
035-17443-000 Rev. A (800)
.
The appropriate electrical knock-outs for power wiring, control wiring and gas piping should be removed at this time.
Return air may enter the furnace through either one side and
a bottom or through bottom only, depending on the type of
application. Return air may not be connected into the rear
panel of the unit. See the specific type application installation for details. Be sure to see the Filters section of this
instruction.
FRONT OF
FURNACE
CORNER
MARKINGS
FIGURE 2:SIDE RETURN CUTOUT MARKINGS
Bottom Return
Bottom return applications normally pull return air through a
base platform or return air plenum. Be sure the return platform structure is suitable to support the weight of the furnace.
Refer to Figure 1 on page 6, and Table 3 on page 6 for unit
weights and dimensions. Be sure to seal the furnace to plenum connection to prevent air leakage.
NOTE:A bottom filter frame accessory kit (1BR0332) is available (less filters) for this model. If the external mounted filter
rack is being used, see the instructions provided with that
accessory for installation.
Upflow attic installations must meet all minimum clearances
to combustibles and have floor support with required service
accessibility.
HORIZONTAL APPLICATION
ATTIC INSTALLATION
This appliance is design certified for line contact for furnaces
installed horizontally. The intersection of the furnace top and
sides form a line.
This line may be in contact with combustible material. However, refer to the “VENTING, and “CLEARANCES” sections
in this manual for additional information.
Secure a platform constructed of plywood or other building
material to the floor joists. Sheet metal, 12" in front of the furnace combustion air openings is recommended. Refer to Figure 3 on page 9 for details.
WARNING
When a furnace is installed in an attic or other
insulated space, keep all insulating materials at
least 12" away from furnace and burner combustion air openings.
NOTE: See crawl space installation for suspending the furnace in attic installations.
SUPPLY PLENUM CONNECTION
SUPPLY AIR
LINE CONTACT ONLY PERMISSIBLE
BETWEEN LINES FORMED BY THE
INTERSECTION OF FURNACE TOP
AND TWO SIDES AND BUILDING
JOISTS, STUDS OR FRAMING
VENT (MAINTAIN
REQUIRED CLEARANCES
TO COMBUSTIBLES)
GAS PIPING
The furnace may be installed horizontally with the supply airflow toward the left or right by laying the unit on the left or
right side panel.
WARNING
Do not install the unit on the rear panel.
SHEET METAL
IN FRONT OF FURNACE
COMBUSTION
AIR OPENINGS IS
RECOMMENDED
12"
RETURN AIR
30" MIN
WORK AREA
SEDIMENT TRAP
FIGURE 3: TYPICAL ATTIC INSTALLATION
After determining the best orientation, lay the unit on top of
the shipping carton to protect the finish.
Unitary Products Group
9
035-17443-000 Rev. A (800)
GAS PIPING
CRAWL SPACE INSTALLATION
The furnace can be hung from floor hoists or installed on suitable blocks or pad. Blocks or pad installations shall provide
adequate height to ensure the unit will not be subject to water
damage.
When suspending the furnace from rafters or floor joists
using rod, pipe or straps, refer to Figure 1 on page 6 and
Table 3 on page 6, for furnace weight and dimensions to
determine suitable means of suspension.
Angle supports should be located as shown in Figure 5 to
permit service of blower and burner compartments. All six
suspension points must be level to ensure proper door fit-up
and quiet furnace operation. Isolators should be used to minimize noise being transferred to the structure. Furnace should
be securely fastened to the bottom angle iron bracket to prevent movement and vibration.
JOIST OR
CEILING
FURNACE
FRONT
FURNACE
BOTTOM
An overpressure protection device, such as a
pressure regulator, which conforms to the National
Fuel Gas Code, ANSI Z223.1 (US) or CAN-B149.1
or .2 (Canada) and acts to limit the downstream
pressure to value that does not exceed 0.5 PSI
(14” w.c.), must be installed in the gas piping system upstream of the furnace. Failure to do so may
result in a fire or explosion or cause damage to the
furnace or some of its components.
NOTE:An accessible manual shutoff valve must be installed
upstream of the furnace gas controls and within 6 feet of the
furnace.
The furnace and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2
psig (3.48 kPa).
MIN.
6"
ANGLE
IRON
BRACKET
WARNING
The furnace must be isolated from the gas supply piping system by closing its individual external manual shutoff valve
during any pressure testing of the gas supply piping system
at test pressures equal to or less than 1/2 psig (3.48 kPa).
CAUTION
FIGURE 4 : TYPICAL FURNACE INSTALLATION
USING SUSPENSION MATERIALS
Never apply a pipe wrench to the body of the combination automatic gas valve. A wrench must be
placed on the projection or wrench boss of the
valve when installing piping to it.
JOIST OR
CEILING
Gas piping may be connected from either side of the furnace.
Sizing and installation of the supply gas line should comply
with the local utility requirements.
3" MAX
MIN.
6"
SUPPORT
ROD
FURNACE
FRONT
VENT
PIPING
23"
18" MIN
ANGLE-IRON
BRACKET
(1" MIN. WIDTH)
The gas supply should be a separate line, installed in accordance with the National Fuel Gas Code, ANSI Z223.1, or
CAN / CGA B149.1 or.2 Installation Codes - (latest editions).
Some utility companies, or local codes, require pipe sizes
larger than the minimum sizes listed. Use properly sized
wrought iron, approved flexible or steel pipe, to make gas
connections to the unit. Installation of a drop leg and ground
union is required (refer to Figure 6 )
FIGURE 5 : TYPICAL FURNACE INSTALLATION
USING SUSPENSION MATERIALS
10
Unitary Products Group
035-17443-000 Rev. A (800)
TO GAS
SUPPLY
EXTERNAL MANUAL
SHUTOFF VALVE
GROUND JOINT UNION
MAY BE INSTALLED
INSIDE OR OUTSIDE UNIT
Provide a power supply(s) separate from all other circuits.
Install overcurrent protection and disconnect switch per
local / national electrical codes. The switch should be reasonably close to the unit for convenience in servicing. With the
disconnect switch(s) in the OFF position, check all wiring
against the unit wiring label. Also, see the wiring diagram in
this instruction. .
TO GAS
SUPPLY
WARNING
Drop Leg
DROP LEG
Use copper conductors only.
NOTE: The furnace control system depends on correct
polarity of the power supply and a proper ground connection.
Refer to the Furnace Control Diagnostics section for symptoms of reversed power supply polarity.
GAS VALVE
FIGURE 6 : GAS PIPING
Connect the power supply as shown on the unit wiring label
on the inside of the blower compartment door and as detailed
in (Refer to Figure 7 on page 12).
.
WARNING
FURNACE CONTROL CIRCUIT
Compounds used on threaded joints of gas piping
must be resistant to the action of liquefied petroleum gases.
The control circuit requires 115 volt power supply. The black
and blue leads must be connected to the hot conductor of the
power supply. Refer to Figure 7 on page 12.
After all gas piping connections are completed,
leak test all joints, fittings and furnace connections with rich soap and water solution, commercial available bubble type leak detection fluid, or
other approved means.
BLOWER MOTOR CIRCUIT
Do not use an open flame or other source of ignition for leak testing.
NOTE: A 1/8” NPT plug is included in the inlet side of the gas
valve for measuring incoming gas pressure. Refer to Table 4
for inlet pressure information.
TABLE 4: INLET GAS PRESSURE RANGE
The motor circuit requires 230 volt power supply as shipped.
This circuit may be changed to 115 volts (standard 1-1/2 HP
motor only) by revising the internal motor connections. Refer
to wiring diagram on the motor.
All field power wiring connections are shown in Figure 7 A,
B, & C on page 12.
Remove the 4 x 4 junction box cover plate. Route the power
wiring through the unit side panel with a conduit connector or
other proper connection. Make wiring connections as shown
in Figures 7 A, B, or C. Replace the wiring box cover plate
and secure with screws.
INLET GAS PRESSURE RANGE
Natural Gas
Propane (LP)
Minimum
4.5 In. W.C.
11 In. W.C.
Maximum
13.9 In W.C.
13.9 In. W.C.
ELECTRICAL POWER CONNECTION
Field wiring to the unit must conform to and be grounded in
accordance with the provisions of the National Electrical
Code ANSI/NFPA No. 70 -latest edition, Canadian Electric
Code C22.2 Part 2 - (latest edition) and / or local codes.
Electrical wires which are field installed shall conform with the
temperature limitation for 63°F / 35°C rise wire when installed
in accordance with instructions. Specific electrical data is
given on the furnace rating plate.
Unitary Products Group
11
035-17443-000 Rev. A (800)
ELECTRICAL CONTROL CONNECTIONS
FIGURE 7A
115 V SINGLE POWER SUPPLY
1-1/2 HP MOTOR ONLY
GREEN
GND
WHITE
RED
N
BLACK
BLUE
L1
NOTE: Internal motor wiring must be
changed to 115 v
Install the field-supplied thermostat. The thermostat instructions for wiring are packed with the thermostat. With the thermostat set in the OFF position and the main electrical source
disconnected, complete the low-voltage wiring from the thermostat to the terminal board on the low-voltage transformer.
Connect Class 2 control wiring as shown in Figures 8 and 14
“WIRING DIAGRAM”.
Apply strain relief to the thermostat wires passing through the
cabinet.
ROOM
THERMOSTAT
R
W
G
FIGURE 7B
115/230 POWER SUPPLY
USING 3 WIRES
115 V CONTROL
230 V MOTOR
GREEN
Y
FURNACE
CONTROL
CONDENSING
UNIT
R
W
G
TO AIR CONDITIONER
CONTROLS
Y
C
FIGURE 8 : TYPICAL HEATING AND COOLING
CONTROL CONNECTIONS
GND
WHITE
N
BLACK
BLUE
L1
RED
L2
NOTE: Some electronic thermostats do not have adjustable
heat anticipators. They may have other types cycle rate
adjustment. Follow the thermostat manufacturer's instructions.
FIGURE 7C
SEPARATE 115 V & 208/230 V POWER SUPPLIES
115 V CONTROL
230 V MOTOR
GREEN
GND
N
L1
L1
L2
WHITE
BLACK
BLUE
RED
}
}
Set the heat anticipator in the room thermostat to .45
amps. Setting it lower will cause short cycles. Setting
it higher will cause the room temperature to exceed
the setpoint.
115 V
CONTROL
CIRCUIT
208 / 230 V
MOTOR
CIRCUIT
The 24-Volt, 40 VA transformer is sized for the furnace components only, and should not be connected to auxiliary
devices such as humidifiers, air cleaners, etc. The
transformer may provide power for an air conditioning unit
contactor.
CAUTION
7C
FIGURE 7 : ELECTRICAL WIRING
An alternate wiring method is to use a field provided 4 x 4 box
and cover on the outside of the furnace. Route the furnace
leads into the box using a protective bushing where the wires
pass through the furnace panel.
If the furnace is installed with a condensing unit
equipped with its own transformer, the condensing unit control circuit must be isolated from the
furnace transformer. Refer to Figure 9 for connection details.
NOTE: The power connection leads and wiring box on
upflow units may be relocated to the left side of the furnace.
Remove the screws and cut wire tie holding excess wiring.
Reposition on the left side of the furnace and fasten using
holes provided. Resecure loose wires to prevent contact with
moving parts / hot surfaces and sheet metal edges.
12
Unitary Products Group
035-17443-000 Rev. A (800)
To separate control circuits, use one of the followng methods:
1.
Install an isolation relay between the thermostat and the
condensing unit transformer.
2.
Use a thermostat equipped with separate “R-H” and “RC” contacts.
WARNING
The blower motor power supply will not be deenergized when the blower door is removed. Turn main
power disconnect switch to OFF to remove power
to motor.
NOTE: Remove the jumper between these contacts of the
thermostat, if so equipped. .
Blower and burner must never be operated without
the blower panel in place.
Electrical supply to the unit is dependent upon the panel that
covers the blower compartment being in place and properly
positioned.
Using Isolation Relay
Room
Thermostat
Furnace
Control
R
R
W
W
G
G
Y
Y
Isolation
Relay (1K)
Condensing
Unit
1K
R
C
C
WARNING
XFMR
Y Contactor
Coil
Main power supply(s) to the unit must still be interrupted at the main power disconnect switch(s)
before any service or repair work is to be done to
the unit. Do not rely upon the interlock switch
as a main power disconnect.
...Field Wiring
Using R-H and R-C Thermostat
Room
Thermostat
Rh
Remove
Jumper
If
Supplied
W
Furnace
Control
Condensing
Unit
R
W
G
G
XFMR
Y
R
C
C
Rc
Y
Y
Rollout Switch Controls: These controls are mounted on
the burner assembly. If the temperature in the burner compartment exceeds its set point, the igniter control and the gas
valve are de-energized. This is a manual reset control and
must be reset before operation can continue.
...Field Wiring
FIGURE 9 : TYPICAL THERMOSTAT WRIING
WITH COMMERCIAL CONDENSING
UNIT
This furnace is equipped with a “Time-On” Delay Relay to
protect the belt-drive motor and start relay if furnace operates, (1) under continuous fan mode, or (2) when installing
twinning kit 2TC03700124. Application of twinning kit also
requires use of “Accessory Sensor Kit 2TS03700106.
The operation of this control indicates a malfunction in the
combustion air blower or a blocked vent pipe condition.
Pressure Switch: This furnace is supplied with a differential
pressure switch which monitors the flow through the furnace
and venting system. This switch de-energizes the ignition
control module and the gas valve if any of the following conditions are present:
1.
Blockage of internal flue gas passageways.
2.
Blockage of vent piping.
SAFETY CONTROLS
3.
Failure of combustion air blower / motor.
Blower Door Safety Switch: This unit is equipped with an
electrical interlock switch mounted in the blower compartment. This switch interrupts the 115 volt control power at the
unit when the blower door panel is removed..
Limit Controls: Two high temperature limit controls are
located on the furnace vestibule panel just to the left and right
of the heat exchanger. This is an automatic reset control and
provides over temperature protection due to reduced airflow,
such as a dirty filter or a blower motor malfunction.
Control Circuit Fuse: A 3-amp fuse is provided to protect
the 24 volt transformer from overload caused by control circuit wiring errors. This is an ATO-3, automotive type fuse and
is located on the furnace control.
Unitary Products Group
13
035-17443-000 Rev. A (800)
START-UP AND ADJUSTMENTS
The initial start-up of the furnace requires the following additional procedures.
1.
2.
When the gas supply is initially connected to the furnace,
the gas piping may be full of air. In order to purge this air,
it is recommended that the ground joint union be loosened until the odor of gas is detected. When gas is
detected, immediately retighten the union and check for
leaks. Allow five minutes for any gas to dissipate before
continuing with the start-up procedure.
All electrical connections made in the field and in the factory should be checked for proper tightness.
IGNITION SYSTEM CHECKOUT / ADJUSTMENT
1.
Turn the gas supply ON at external manual shutoff valve
and main gas valve.
2.
Set the thermostat above room temperature to call for
heat.
3.
System start-up will occur as follows:
a.
The venter motor will start and come up to speed.
Shortly after venter start-up, the hot surface igniter
will glow for about 17 seconds.
b.
After this warm-up cycle, the ignition module will
energize (open) the main gas valve for seven seconds.
NOTE: Burner ignition may not be satisfactory on first startup due to residual air in gas line, or until gas pressure (manifold) is adjusted. The control will make three (3) attempts to
light before locking out.
4.
With the furnace in operation, paint the pipe joints and
valve gasket lines with a rich soap and water solution.
Bubbles indicate a gas leak. Take appropriate steps to
stop the leaks. If the leak persists, replace the component.
WARNING
DO NOT omit this test! NEVER use a flame to
check for gas leaks.
CHECKING GAS INPUT
The accuracy of the gas meter is affected by both the
temperature and barometric pressure. Gas meter readings
should be accurate at 60º F and 30.0”h.g. barometric pressure. However, temperatures higher than 60º F will cause the
meter to speed up resulting in a higher gas consumption
reading while lower temperatures will result in lower consumption readings. For the barometric pressure, a value
greater than 30” h.g. will slow the meter while a value less
than 30” h.g. speeds up the meter. Depending on the conditions, an error of ±5% is not uncommon.
If weather conditions significantly differ from these values at
the time when the gas input rate is being determined, a gas
meter correction factor can be easily calculated to provide for
more accurate input rate adjustment. To calculate a meter
correction factor, use the following formula:
(Barometric Pressure) x 520
(Temperature + 460) x 30
= Meter Correction Factor
Using the information from above, calculate the gas input
rating by multiplying the number of cubic feet of gas
consumed per hour by the meter correction factor and by the
Btu content (heating value) of the gas in your particular
locality. Use 1 for a meter correction factor if it was not
calculated.
NOTE:Contact your gas company for the actual heating
value of the gas in your locality as it varies widely from city to
city.
Example - Checking Gas Input
It is found by measure that it takes 26 seconds for the hand
on the 1 cubic foot dial to make a revolution with only a
120,000 Btuh furnace running. Using this information, locate
26 seconds in the first column of Table 5 on page 15. Read
across to the column headed 1 cubic foot where you will see
that 138 cubic feet of gas per hour are consumed by the furnace at that rate.
With the barometer at 28.9” and a 70º F temperature, the
correction factor will be .945. If the local gas heating value is
935 BTU per cubic foot the calculations will be as follows:
(Gas Rate) x (MCF) x (Heating Value) = Hourly Input Rate
(138ft3/hr)(0.945)(935 Btuh/ft3) = 121,933 Btuh
1.
Turn off all other gas appliances connected to gas meter.
The calculated firing rate of 121,933 BTU per hour is within
the +2% tolerance of our nominal 120,000 furnace.
2.
With the furnace turned on, measure the time needed for
one revolution of the hand on the smallest dial on the
meter. A typical domestic gas meter usually has a 1/2 or
1 cubic foot test dial.
If the actual input is not within +2% of the furnace rating, with
allowance being made for the permissible range of the
regulator setting (0.3 inches W.C.), replace the orifice spuds
with spud of the proper size.
3.
Using the number of seconds for each revolution and the
size of the test dial increment, find the cubic feet of gas
consumed per hour from Table 5.
14
Unitary Products Group
035-17443-000 Rev. A (800)
CAUTION
ON
OFF
Be sure to relight any gas appliances that were
turned off at the start of this input check.
Inlet
Outlet
ADJUSTMENT OF MANIFOLD GAS PRESSURE
Wrench
Boss
On/Off Switch
1.
Turn gas off at main gas valve. Remove 1/8" plug/outlet
pressure tap in the main gas valve body and install
proper manometer tube adapter fitting. Connect line from
gas valve tap to manometer.
2.
Refer to Figure 10 on page 15 for location of outlet pressure. Tap pressure regulator adjustment cap and screw
on main gas valve.
Main Regulator
Adjust
NOTE:The screw-off cap for the pressure regulator must be
removed entirely to gain access to the adjustment screw.
WARNING
The cap must be replaced in order for the furnace
to operate properly.
FIGURE 10 : GAS VALVES
TOP - WHITE-RODGERS 36F52-252
BOTTOM - HONEYWELL VR8205
3.
Turn gas and electrical supplies ON. Turn gas valve
switch to “ON” position. Start furnace and observe manifold pressure on manifold.
4.
If necessary, adjust manifold pressure by adjusting gas
valve regulator screw to agree with Table 6 values.
TABLE 5: GAS RATE (CUBIC FEET PER HOUR)
SECONDS FOR
SIZE OF TEST DIAL
ONE REVOLUTION
1/2 CUBIC FOOT
1 CUBIC FOOT
10
180
360
12
150
300
14
129
257
16
113
225
18
100
200
20
90
180
22
82
164
24
75
150
26
69
138
28
64
129
30
60
120
32
56
113
34
53
106
36
50
100
38
47
95
40
45
90
42
43
86
44
41
82
46
39
78
48
37
75
50
36
72
52
35
69
54
34
67
56
32
64
58
31
62
60
30
60
Unitary Products Group
TABLE 6: MANIFOLD PRESSURE
Natural Gas
3.5" W.C.
Propane (LP)
10.0" W.C.
It may be necessary to re-adjust the gas valve inlet pressure
(see Table 4 for values) using a similar procedure but using
the inlet pressure tap on valve - adjust line regulator.
If gas valve regulator is turned in, or clockwise, manifold
pressure is increased. If screw is turned out, or counterclockwise, manifold pressure will decrease.
5.
Once the correct gas pressure to the burners has been
established, turn the gas valve switch to OFF and turn
the electrical supply switch OFF; then, remove the pressure tap at the gas valve and re-install the plug using a
compound (on the threads) resistant to the action of LP
gases.
15
035-17443-000 Rev. A (800)
5.
Adjust the belt tension with the motor adjusting bolt until
the belt can be depressed 1" with a finger at a point halfway between the two pulleys. Loosen the (4) motor
mount bolts to permit adjustment. Retighten bolts after
adjusting.
6.
Repeat the pulley adjustment procedure until the
desired temperature rise is obtained.
WARNING
The manifold pressure must be checked with the
screw-off cap in place on the pressure regulator.
If manifold pressure is too high, an over-fire condition exists which could cause heat exchanger failure. If the manifold pressure is too low, sooting
and eventual clogging of the heat exchanger could
occur.
6.
Turn the electrical and gas supplies back on, and, with
the burners in operation, check for gas leakage around
the plug with a soap and water solution.
WARNING
ADJUSTMENT OF FAN-OFF CONTROL SETTINGS
This furnace is equipped with a time-on / time-off heating fan
control. The fan on delay is fixed at 30 seconds. the fan off
delay is field adjustable from 60 to 180 seconds. The fan off
delay is factory set to 120 seconds.
The “fan-off” setting must be long enough to adequately cool
the furnace, but not so long that cold air is blown into the
heated space. The “fan-off” timing may be adjusted by positioning the jumper (refer to Figure 11 ) located on the control board.
Be sure that the gas valve pressure regulator cap
is replaced.
ADJUSTMENT OF TEMPERATURE RISE
Cool
Heat
After about 20 minutes of operation, determine the furnace
temperature rise. Take readings of both the return air and the
heated air in the ducts, about six feet from the furnace where
they will not be affected by radiant heat.
Increase the blower speed to decrease the temperature rise;
decrease the blower speed to increase the rise. Blower
speed adjustment is made as follows:
1.
Remove the belt and loosen the set screw in the adjustable flange of the motor pulley.
2.
Close the pulley to decrease the temperature rise; open
the pulley to increase the rise.
3.
Position the set screw with one of the flats on the pulley
hub and tighten it.
4.
Align the fixed flange of the motor pulley with the blower
pulley.
CAUTION
Improper alignment will cause excessive noise,
belt wear and bearing failure.
16
Park
Park
Line
XM
60
90
120
The temperature rise, or temperature difference between the
return air and the heated air from the furnace, must be within
the range shown on the furnace rating plate and within the
application limitations shown in Table 3. After the temperature
rise has been determined, the airflow (cfm) can be calculated. Refer to Blower Performance Matrix, Table 7 on page
22.
180
FAN OFF
ADJUSTMENT
FIGURE 11 : FAN-OFF TIME ADJUSTMENT
ACCESSORY CONNECTIONS
The furnace control will allow power switching control of various accessories. Refer to Figure 12 for connection details.
Electronic Air Cleaner Connection: Two 1/4" spade terminals (EAC and EAC N) for electronic air cleaner connections
are located on the control board. The terminals provide 115
VAC (1.0 amp maximum) during circulating blower operation.
Humidifier Connection: Two 1/4" spade terminals (HUM
and HUM N) for humidifier connections are located on the
control board. The terminals provide 115 VAC (1.0 amp maximum) during heating system operation
Twinning: When two furnaces are installed using the same
duct system, it is very important that the two furnaces circulating air blowers operate simultaneously. If one blower starts
Unitary Products Group
035-17443-000 Rev. A (800)
before the second blower, the duct system will become pressurized with air and the second blower will be made to turn
backwards. During heating operation, this will cause overheating of the second furnace, possibly causing an unsafe
condition and damage to the furnace. If twinning of two furnaces is desired, it is necessary to use the accessory twining
kit that is designed for use with these furnaces.
This furnace is equipped with a “Time-On” Delay Relay which
is required to protect the belt-drive motor/starter if operated
(1) under continuous fan mode, or (2) when installing twinning kit 2TC03700124. Application of twinning kit also
requires use of “Accessory Sensor Kit 2TS03700106.
115 VOLT
HUMIDIFIER
HUM HOT
BLK
WHI
EAC
HUM
SWITCHED
CIRCUITS
EAC HOT
BLK
115 VOLT
ELECTRONIC
AIR CLEANER WHI
EAC
NEUTRALS
HUM
FIGURE 12 : ACCESSORY CONNECTIONS
Unitary Products Group
17
035-17443-000 Rev. A (800)
OPERATION AND MAINTENANCE
SEQUENCE OF OPERATION
The following describes the sequence of operation of the furnace. See “WIRING DIAGRAM” Figure 14, for component
location. Refer to Figure 13 for event schedule.
CONTINUOUS BLOWER
On cooling / heating thermostats with fan switch, when the
fan switch is set in the ON position, a circuit is completed
between terminals R and G of the thermostat. The blower
motor is energized through the contactor and runs at the
selected speed.
INTERMITTENT BLOWER - COOLING
On cooling / heating thermostats with fan switch, when the
fan switch is set in the auto position and the thermostat calls
for cooling, a circuit is completed between the R, Y and G terminals. The motor is energized through the contactor and
runs at the selected speed. The No “On-Delay” “Fan-Off” setting is fixed at 60 seconds for SEER enhancement.
HEATING CYCLE
When the system switch is set on HEAT, the fan is set on
AUTO, and the room thermostat calls for heat, a circuit is
completed between the terminals R and W of the thermostat.
When the proper amount of combustion air is being provided,
a pressure switch activates the ignition control.
The ignition control provides a 17-second warm-up period.
The gas valve then opens for seven seconds.
As gas starts to flow and ignition occurs, the flame sensor
begins its sensing function. If a flame is detected within seven
seconds after ignition, normal furnace operation continues
until the thermostat circuit between R and W is opened. After
flamme is present for 30 seconds, the circulating blower is
energized.
After the 60-second wait, the ignition sequence is restarted
with an additional 10 seconds of igniter warm-up time. If this
ignition attempt is unsuccessful, one more re-try will be
made before lockout.
A momentary loss of gas supply, flame blowout, or a shorted
or open condition in the flame probe circuit will be sensed
within 0.8 seconds.
The gas valve will de-energize and the control will restart the
ignition sequence immediately. Recycles will begin and the
burner will operate normally if the gas supply returns, or the
fault condition is corrected prior to the last ignition attempt.
Otherwise, the control will lockout.
The control will repeat the ignition sequence for a total of two
recycles if flame is lost within the first 10 seconds of
establishment.
If flame is established for more than 10 seconds after ignition,
the control will clear the ignition attempt (retry) counter. If
flame is lost after 10 seconds, it will restart the ignition
sequence. This can occur a maximum of five times.
During burner operation, a momentary loss of power of 50
millseconds or longer will drop out the main gas valve. When
the power is restored, the gas valve will remain de-energized
and a restart of the ignition sequence will begin immediately.
HOT SURFACE IGNITION SYSTEM
WARNING
Do not attempt to light this furnace by hand (with a
match or any other means). There may be a
potential shock hazard from the components of the
hot surface ignition system. The furnace can only
be lit automatically by its hot surface ignition system.
MAINTENANCE
When the thermostat circuit opens, the ignition control is deenergized. With the ignition control de-energized, the gas
flow stops and the burner flames are extinguished. The
ventor continues to operate for 15 seconds after the gas flow
stops.
AIR FILTERS
The blower motor continues to operate for the amount of time
set by the fan-off delay switches located on the control board.
The heating cycle is then complete and the unit is ready for
the start of the next heating cycle.
Clean (or replace) the filters at least every three months. On
new construction, check the filters every week for the first
The filters should be checked periodically for dirt accumulation. Dirty filters greatly restrict the flow of air and overburden
the system.
If the flame is not detected within the seven second sensing
period, the gas valve is de-energized. The control is
equipped with a re-try option. This provides a 60-second wait
following an unsuccessful ignition attempt (flame not
detected).
18
Unitary Products Group
035-17443-000 Rev. A (800)
four weeks. Inspect the filters every three weeks after that,
especially if the system is running constantly.
BURNER REMOVAL / CLEANING
The main burners should be checked periodically for dirt
accumulation.
WARNING
When replacing filters, DO NOT use a type with
excessively high pressure drop. Some high efficiency filters available will cause the furnace to
operate improperly and could result in a safety
hazard.
If cleaning is required, follow this procedure:
1.
Turn off the electrical power to the unit and turn off gas
supply at the shutoff valve.
2.
Remove the blower and burner compartment access
doors.
3.
Unplug igniter from the wire harness and remove the
igniter / bracket assembly from the burner air shield.
Handle the igniter carefully as it is fragile and easily broken.
4.
Note the location and then disconnect the senser and
rollout switch wires located on the top of the air shield
and remove the shield.
Even with good filters properly in place, blower wheels and
motors will become dust laden after long months of operation. The entire blower assembly should be inspected annually. If the motor and wheel are heavily coated with dust, they
can be brushed and cleaned with a vacuum cleaner.
5.
Remove the two screws securing each burner to the
burner assembly. Note the orientation of the burner
(flanged side down) before removing. Burners may be
cleaned by rinsing in hot water or by using a vacuum
cleaner.
The procedure for removing the blower assembly for cleaning
is as follows:
6.
To re-assemble - reverse the procedure. Restore power
and verify operation.
1.
CLEANING THE HEAT EXCHANGER
LUBRICATION
Blower and venter motors in these furnaces are permanently
lubricated and do not require periodic oiling.
BLOWER CARE
2.
3.
4.
Turn off electrical power supply to the furnace at disconnect switch(s). Remove access doors. Remove motor
harness using 3 wires on panel.
Remove the screws holding the control box to the
blower. Swing the control box out of the way to allow
removal of the blower.
Remove blower/motor assembly, shipping screws (2),
and deck screws; Stop and slide the blower assembly
out of the slots in the deck.
NOTE:If heat exchanger is sooted, it is recommended that
the heat exchanger be replaced due to difficulty in cleaning.
Lower Heat Exchanger Access
1.
Turn off the electrical power to the unit and turn off gas
supply at the shutoff valve.
2.
Remove the blower and burner compartment access
doors. Disconnect the gas supply piping at the union to
permit removal of the entire burner and gas control
assembly from the vestibule panel. Use the wrench boss
on the gas valve when removing or installing this piping.
3.
Unplug the igniter from the wire harness. Disconnect
senser and rollout switch wires located on top of the air
shield. Identify and note the location of all leads for ease
of reinstallation. Also disconnect the wires at the side
rollout switches (upflow only) and the gas valve wires.
4.
Remove the screws holding the burner assembly to the
vestibule panel and remove this assembly. Handle the
assembly carefully since it contains the igniter which is
fragile and easily broken. The lower portion of the heat
exchanger will now be exposed. To clean the burner
assembly, use a vacuum cleaner, or remove the burners
as outlined in burner cleaning, and clean in hot water.
When cleaning or servicing the blower assembly, DO
NOT remove or change the balance clips on the blower
wheel.
CAUTION
This blower motor assembly weighs 90 lbs. Have
adequate support to prevent injury.
5.
To reassemble, reverse the procedure, restore power to
the furnace and verify operation.
6.
To re-assemble, reverse the procedure, restore power
and verify operation.
Unitary Products Group
19
035-17443-000 Rev. A (800)
Upper Heat Exchanger Access
1.
Perform steps 1-4 above.
2.
Disconnect vent piping from the vent motor assembly at
the top panel on the furnace.
3.
Unplug the venter motor wires and ground wire. Remove
the pressure switch tubing at the tap on the venter motor
housing.
NOTE: It is recommended that replacement gaskets be
available before removing venter motor.
4.
5.
6.
7.
Remove six mounting screws that hold the venter motor
to the restrictor plate. The surface is gasketed and gasket can be reused if it is carefully removed. It is necessary to remove this assembly to gain access to the
restrictor plate mounting holes. The assembly may be
vacuumed if cleaning is necessary. If any vent assembly
parts are damaged, replace with an entire new assembly
(except for gaskets).
Remove the perimeter screws attaching the restrictor
plate assembly to the vestibule panel. The surface is
also gasketed. The assembly, including the flue baffle
plate (rear) may be vacuumed or cleaned with hot water
if necessary.
The upper portion of the heat exchanger is now accessible. With a long flexible wire brush, clean inside each
tube at both the top and bottom. The brush must pass
around the rear heat exchanger tubes. Vacuum loose
scale and dirt from each tube.
Clean - Replace all components in reverse order. Regasket all surfaces which required a gasket. Reconnect all
wiring. Reattach vent pipe and gas supply lines before
restoring service to furnace. Restore electrical power,
check gas supply piping for leaks, then verify furnace
operation.
TROUBLESHOOTING
The following visual checks should be made before troubleshooting:
1.
Check to see that the power to the furnace and the ignition control module is ON.
2.
The manual shutoff valves in the gas line to the furnace
must be open.
3.
Make sure all wiring connections are secure.
4.
Review the sequence of operation.
Start the system by setting the thermostat above the room
temperature. Observe the system's response. Then use the
troubleshooting section in this manual to check the system's
operation.
20
FURNACE CONTROL DIAGNOSTICS
The furnace has a built-in, self diagnostic capability. If a system problem occurs, a fault code is shown by a blinking LED.
It is located behind a clear view port in the blower compartment door. DO NOT remove the furnace blower compartment
panel OR turn off furnace power as either action will clear the
control's memory of the fault.
The control continuously monitors its own operation and the
operation of the system. If a failure occurs, the LED will indicate the failure code. If the failure is internal to the control, the
light will stay on continuously. In this case, the entire control
should be replaced as the control is not field repairable.
Flash sequence codes 1 though 11 are as follows; LED will
turn “on” for one second and “off” for one second. This pattern will be repeated the number of times equal to the code.
For example, six “on” flashes equals a number 6 fault code.
All flash code sequences are broken by a 2 second “off”
period.
IGNITION CONTROL (P/N 031-01267-001)
Normal flame sense current is approximately
3.7 microamps DC ( υa)
Low flame signal and control lockout point is
0.9 microamps DC (υa)
CONTINUOUS FLASH: This indicates the flame was sensed
when there was not a call for heat. With this fault code the
control will turn on both the inducer motor and supply air
blower. This fault would typically be caused by a gas valve
that leaks through or is slow closing.
2 FLASH: This indicates that the normally open pressure
switch contacts are stuck in the closed position. The control
confirms these contacts are open at the beginning of each
heat cycle. This would indicate a faulty pressure switch or m
is-wiring.
3 FLASH: This indicates the normally open pressure switch
contact did not close at the beginning of the heat cycle. This
could be caused by a number of problems; faulty inducer,
blocked vent pipe, broken pressure switch hose or faulty
pressure switch.
4 FLASH: This indicates that a primary or auxiliary limit
switch has opened its normally closed contacts. With this
fault code the control will operate the supply air blower and
inducer. This condition may be caused by: dirty filter, improperly sized duct system, incorrect blower speed setting,
incorrect firing rate or faulty blower motor.
5 FLASH: This fault is indicated if the normally closed contacts in the rollout switch opens. The rollout control is manually reset. If it has opened, check for proper combustion air,
proper inducer operation, primary heat exchanger f ailure or
burner problem. Be sure to reset the switch after correcting
the failure condition.
Unitary Products Group
035-17443-000 Rev. A (800)
6 FLASH: This indicates that after the unit was opening, the
pressure switch opened 4 times during the call for heat. If the
main blower is in a “Delay On” mode, it will complete it and
any subsequent delay off period. The ventor continues to
operate until the pressusre switch re-closes or a call for heat
is removed.
7 FLASH: This fault code indicates that the flame could not
be established. This no-light condition occurred 3 times (2
retries) during the call for heat before locking out. This may
be caused by low gas pressure, faulty gas valve, faulty hot
surface ignitor or burner problem.
8 FLASH: This fault in indicated if the flame is lost 5 times (4
recycles) durin the heating cycle. This could be caused by
low gas pressure or faulty gas valve.
9 FLASH: Indicates reversed line voltage polarity. Both heating and cooling operations will be affected. Check polarity at
furnace and branch.
11 FLASH: This fault will be indicated if the rollout jumper
wire connection soldered into the board is broken. If this fault
occurs the control will have to be replaced. This fault may
also occur in installations when an improper ground is
present. Prior to replacing control, verify that the unit is properly grounded.
STEADY ON: This fault occurs if the gas valve is energized
when there is no call for heat. If this happens the ventor is
energized and will remain energized for 5 seconds or until the
fault clears itself at which point the ventor de-energizes. This
Unitary Products Group
failure is counted as a recycle. Check the valve and control
for proper operation.
60 MINUTE AUTOMATIC RESET FROM LOCKOUT: This
control includes a “watchdog” type circuit that will reset from a
lockout condition after 60 minutes. Operational faults 1,6,7,8
and Steady On will be reset. This provides protection to an
unoccupied structure if a temporary condition exists causing
a furnace malfunction. An example would be a low incoming
gas supply pressure preventing unit operation. When the gas
pressure is restored, at some point the “watchdog” would
restart the unit and provide heat for the house.
NOTE: If a flame is detected, the control flashes the LED for
1/8 of a second and then enters a flame stabilization period.
WARNING
Never jumper the pressure switch to allow furnace
operation. To do so will allow furnace to operate
under potentially hazardous conditions.
Do not try to repair controls. Replace defective
controls with UPG Source 1 Parts.
Never adjust pressure switch setpoint to allow
furnace operation.
21
035-17443-000 Rev. A (800)
FIGURE 13 : FURNACE EVENT CONTROL SCHEDULE
VENTER
TABLE 7: BLOWER PERFORMANCE CFM -UPFLOW/HORIZONTAL (WITHOUT FILTER)
Note: Data below reflects airflows with bottom return opening.
VOLTAGE
230 VAC
MOTOR
PULLEY
TURNS
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
Closed
+
+
+
+
3467
3318
3163
2950
1 Open
3820
3687
3550
3406
3240
3066
2846
2589
2 Open
3575
3433
3269
3096
2913
2700
2449
2049
3 Open
3375
3205
2996
2807
2585
2293
1860
1026
4 Open
2805
2715
2570
2351
2017
1307
--
--
0.90
1.00
MOTOR
PULLEY
TURNS
VOLTAGE
208 VAC
+
EXTERNAL STATIC PRESSURE, INCHES W.C.
EXTERNAL STATIC PRESSURE, INCHES W.C.
0.30
0.40
0.50
0.60
0.70
0.80
Closed
+
+
+
+
3383
3242
3100
2890
1 Open
3674
3555
3423
3283
3144
2990
2789
2555
2 Open
3543
3379
3213
3055
2888
2673
2420
1804
3 Open
3375
3210
3035
2850
2633
2334
1889
--
4 Open
3100
2919
2708
2498
2226
1724
--
--
Operation at these conditions will cause motor overload.
Operation in the shaded area may cause excessive furnace temperature rise.
NOTES: Airflow is expressed in standard cubic feet per minute.
22
Unitary Products Group
035-17443-000 Rev. A (800)
FILTER PERFORMANCE
The airflow capacity data published in Table 7 represents
blower performance WITHOUT filters. To determine the
approximate blower performance of the system, apply the filter drop value for the filter being used or select an appropriate value from Table 8.
The filter drop values in Table 8 are typical values for the type
of filter listed and should only be used as a gu ideline. Actual
pressure drop ratings for each filter type vary between filter
manufacturer.
TABLE 8: FILTER PERFORMANCE - PRESSURE DROP INCHES W.C.
FILTER TYPE - BELT DRIVE FURNACE BOTTOM RETURN
FIBERGLASS
PLEATED
Hogs Hair
High Velocity
Disposable
High Velocity
Air Flow Range
(SCFM)
1” THICK
1” THICK
2” THICK
4” THICK
1500-2300
0.05
0.05
0.05
0.05
2300-2800
0.10
0.075
0.10
0.10
2800-3100
0.20
0.10
0.15
0,15
3100-3500
0.25
0.20
0.20
0.20
Note: Data includes pressure drop of bottom filter rack.
3.
APPLYING FILTER PRESSURE DROP TO DETERMINE
SYSTEM AIRFLOW
To determine the approximate airflow of the unit with a filter in
place, follow the steps below:
1.
Select the filter type.
2.
Determine the External System Static Pressure (ESP)
without the filter.
3.
Select a filter pressure drop from the table and add to the
ESP from Step 3 to determine the total system static.
4.
If total system static measures an ESP value in the airflow table (i.e., 0.20, 0.60, etc.) the system airflow corresponds to the intersection of the ESP column and Blower
Speed row.
5.
If the total system static falls between ESP ESP values
in the table (i.e., 0.58, 0.75, etc.) the static pressure may
be rounded to the nearest value in the table determining
the airflow using Step 5 or calculate the airflow by using
the following example.
Subtract the total system static from 0.50” and divide this
difference by the difference in ESP values in the table,
0.60”-0.50”, to obtain a percentage.
(0.58-0.50) / (0.60-0.50) = 0.8
4.
Multiply percentage by airflow difference to obtain airflow
reduction.
(0.8) x -144) = -115
Subtract airflow reduction value to airflow @0.50” to obtain
actual airflow @0.58” ESP.
3550 - 115 = 3435
Example: It is fouond that the total system static is 0.58” w.c.
using 1-turn pulley. To determine the system airflow, complete the following steps:
1.
Obtain the airflow values at 0.50” and 0.60” ESP.
Airflow @ 0.50”: 3550 CFM
Airflow@0.60”: 3406 CFM
2.
Subtract the airflow @0.50” from the airflow @0.60” to
obtain airflow difference.
3406 - 3550 = -144
Unitary Products Group
23
SEE NOTES
1 AND 7
(MOTOR IS
CONVERTIBLE
TO 115VAC)
208/230VAC
LINE
(HOT)
208/230VAC
LINE
(HOT)
W
Y
G
R
IGNITER
RELAY
HUM
EAC
HEAT/COOL THERMOSTAT
HEAT
OFF
COOL
AUTO
ON
VENTOR
RELAY
HUMIDIFIER
RELAY
EAC
RELAY
W
Y
G
R
HEAT/COOL
RELAY
EAC
BLU
RED
ROS3
LS2
ROS2
GRN
BLOWER
MOTOR
VENTOR
MOTOR
HUMIDIFIER
HEAT
COOL
LS1
GND
NEUT.
115VAC
115VAC
LINE
1R1
SHUNT
C
WHT
BLK
NO
WHT
DELAY - ON
TIMER RELAY
(MOTOR)
1LP
GV
1T (40VA)
COM
HUM
EAC
UP FLOW FURNACE
GND
BLU
RED
ROS1
24V SEC
PRI
1R
CONTACTOR
GAS VALVE
RELAY
ROS4
115V
IGN
TDR
POWER SUPPLY 115-1-60
SEE NOTES 1 AND 7
GND
GND
(HOT)
BLU
BRN
C
S
H
U
N
T
RED
BLU
N
L2
(NEU)
L1
1LP
NO
C
ROS4
BRN
Y
GND
W
R
GRN
G
FURNACE
CONTROL
(TI)
C
8
7
11
9
10
12
P1/S1
4
5
6
1
2
3
NEUTRALS
HUM
EAC
CONNECTION DIAGRAM
ROS4 ROLL OUT SWITCH TOP LEFT
ROS3 ROLL OUT SWITCH TOP RIGHT
ROS2 ROLL OUT SWITEH RIGHT SIDE
ROS1 ROLL OUT SWITCH LEFT SIDE
LS2 AUXILIARY LIMIT SWITCH
LS1 PRIMARY LIMIT SWITCH
BLU
RED
1
2
3
4
P2/S2
LS2
P3/S3 2 PIN PLUG & SOCKET AT HOT SURFACE IGNITER
P2/S2 4 PIN PLUG & SOCKET ON FURNACE CONTROL
RED
WHT
LS1
WHT
PRP
BLK
BLK
YEL
BLK
BLK
ROS3
1T
BRN
CONTACTOR (120V COIL)
1R
GV GAS VALVE (24VAC)
IGN HOT SURFACE IGNITOR
GAS
VALVE
SENSOR
FLAME
2
1
2
1
P3/S3
BRN
BLK
ORN
ORN
WHT
WHT
ROS2
ROS1
SERVICING THIS UNIT
BLK
YEL
MV
MV
VENTOR
MOTOR
035-
ALTERN
GAS VA
HOT
IGN
OPEN ALL DISCONNECTS BEFORE
- CAUTION -
RELAY CONTACTS ON
IGNITION CONTROL BOARD
FIELD WIRING AND DEVICE
FACTORY WIRING AND DEV
FIELD CONNECTION
24V CONNECTION ROOM T
TRANSFORMER 40VA
DELAY-ON TIMER RELAY
PRESSURE SWITCH
1LP
P1/S1 12 PIN PLUG & SOCKET ON FURNACE CONTROL
NO
LEGEND
8. IF A WILD LEG RESULTS WHEN USING A 3 WIRE SUPPLY, CONNECT
WILD LEG TO L2.
7. 3000 CFM MOTOR IS CONVERTIBLE TO 115V BUT IS FACTORY WIRED
FOR 230V. BLOWER MOTOR IS ALSO RATED FOR OPERATION AT
208VAC-1-60 SUPPLY.
6. MOTORS ARE INHERENTLY PROTECTED, AND INCLUDE START/RUN CAPAC
5. PROVIDE DISCONNECTS FOR ALL POWER SUPPLIES.
4. ALL REPLACEMENT COMPONENTS MUST BE PROPERLY GROUNDED.
3. CONNECTORS SUITABLE FOR COPPER CONDUCTORS ONLY.
2. IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE
REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A
TEMPERATURE RATING OF AT LEAST 221ßF (105ßC).
1. ALL FIELD WIRING PER: (A) NATIONAL ELEC. CODE (NEC) AND/OR
(B) CANADIAN ELEC. CODE (CEC) AND/OR
(C) LOCAL OR CITY CODES.
NOTES:
TDR
DS DISCONNECT SWITCH
SEE NOTES 1, 7 AND 8
OPTIONAL FIELD WIRING DIAGRAMS
(HOT)
3-WIRE SUPPLY
115/208/230-1-60
WHT
EAC ELECTRONIC AIR CLEANER
DOOR N.O.SW
GND
BLOWER
MOTOR
1R1
CONTACTOR
HEAT
DS1
L2
COOL
C
(HOT)
DS
POWER SUPPLY
115-1-60
1-1/2 HP
L1
N MOTOR
ONLY
(NEU)
RED
PARK
POWER SUPPLY
208/230-1-60
SEE NOTES
L1
1 AND 7
L1
NO
1R
WHT
PARK
(NEU)
BLK
(HOT)
DS
BLK
EAC
(HOT)
BLK
BLU
HUM
N.O.SW
DOOR SWITCH
N
BLK
DS
RED
(HOT)
DS
BLK
L1
XFMR
DS
WHT
115V
PRI
5005 York
Drive
North
24V SEC
Subject to change without notice. Printed in U.S.A.
Copyright © by Unitary Products Group 2000. All rights reserved.
COM
BLU
Unitary
Product
Group
YEL
SCHEMATIC DIAGRAM
NOTE: The furnace’s control system depends on correct polarity of the power supply.
FIGURE 14 : WIRING DIAGRAM
035-17443-000 Rev. A (800)
Supersedes: 650.74-N2Y (899)
Norman
OK
73069
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