THE COMFORT PRODUCTS PEOPLE
WINDOW WALL FURNACE
DIRECT-VENT PROPANE/LP GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
2503531
4003531
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0
8
9
0
7
0
6
50
SOLID STATE
IGNITION
50 60 70 80 90
25,000 and 40,000 BTU/Hr Furnaces
WARNING:Improperin-
WARNING: If the information in these instructions is not
followed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
stallation, adjustment,
alteration, service, or
maintenance can cause
injury or property dam-
age.Refertothismanual
for correct installation
and operational proce-
dures.Forassistanceor
additional information
consult a qualified in-
staller, service agency,
or the gas supplier.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch.
• Do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and ser-
vice must be performed
by a qualified installer,
service agency, or the
gas supplier.
This appliance may be installed in an aftermarket*, permanently located, manufac-
tured (mobile) home, where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This
appliance is not convertible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
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OWNER’S MANUAL
LOCAL CODES
Install and use furnace with care. Follow all
localcodes.Intheabsenceoflocalcodes,use
the latest edition of the following:
UNPACKING
PRODUCT
1. Remove furnace from carton.
FEATURES
2. Remove all protective packaging ap-
plied to furnace for shipment.
HOT SURFACE IGNITOR
3. Remove the following items from carton: Thisfurnacehasanelectronicignitor.There
• Hardware package containing four is no standing pilot. No matches or batteries
large screws, two small screws, and are required.
• National Fuel Gas Code ANS Z223.1,
also known as NFPA 54 * (USA)
• National Electric Code ANS/NFPA 70*
thermostat mounting plate
• Hardware package (thermostat and
two screws)
• CAN/CGA-B149[.1 or .2] Installation
Codes** (Canada).
THERMOSTATIC HEAT
CONTROL
The thermostat is temperature sensitive. It
automatically turns the furnace on and off.
This results in the greatest heating comfort.
This can also result in lower gas bills.
• Equipment shutoff valve
*Available from:
If any of these items are missing,
promptly inform dealer where you
bought furnace.
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
4. Check furnace for any shipping damage.
If furnace is damaged, promptly inform
dealer where you bought furnace.
National Fire Protection Association, Inc.
Batterymarch Park
LIMIT SWITCH
Thelimitswitchshutsoffthegastothemain
burner if the furnace becomes too hot to
operate safely.
Quincy, MA 02269
**Available from:
Standards Council of Canada
350 Sparks Street
Ottawa, Ontario K1R 7S8
SPECIFICATIONS
25,000 Btu/Hr
25,000
40,000 Btu/Hr
This furnace must be grounded when in-
stalled. Follow all local codes. In the ab-
sence of local codes, refer to the National
ElectricalCodeANS/NFPANo.70(U.S.A.)
or CSA C22.1 Canadian Electrical Code,
Part I (Canada).
*Rated Heating Input (BTU/Hr)
40,000
Thermal Output Capacity
(average loss calculation)
18,750 Btu/Hr
Propane/LP Only
Hot Surface Ignitor
1.5
30,000 Btu/Hr
Type Gas
Propane/LP Only
Ignition
Hot Surface Ignitor
The installation must conform with local
codes,intheabsenceoflocalcodes,withthe
National Fuel Gas Code, ANS Z223.1/Ca-
nadian Installation Code, CAN/CGA B149.
Operating Amps
Volts/Cycles
2
120/60
120/60
2
Main Burner
1
When installing furnace in a manufactured
(mobile) home, follow the Manufactured
Home Construction and Safety Standard,
Title 24CFR, Part 3280 (formerly the Fed-
eral Standard for Mobile Home Construc-
tion and Safety, Title 24, part 280; 1975).
When such a standard is not applicable,
followtheStandardforManufacturedHome
Installations, 1982 (Manufactured Home
Sites, Communities, and Set-Ups), ANS
A225.1/NFPA 501A.
Pressure Regulator Setting
Inlet Connection
10" W.C.
3/8 NPT
10" W.C.
3/8 NPT
Inlet Gas Pressure (in. of water)*
Maximum
13"
11"
13"
11"
Minimum
Dimensions, Inches (H x W x D)
Furnace
15 3/32 x 16 1/8 x 23 5/8
15 3/32 x 21 3/4 x 23 5/8
Weight (pounds)
Furnace
53
65
71
98
InCanada, installfurnaceinaccordancewith
StandardCSAZ240.4-GasEquippedRecre-
ational Vehicles and Mobile Housing and
any applicable local codes and regulations.
Shipping
* For purposes of input adjustment.
Appliance input ratings are based on sea
level operation and need not be changed for
operation up to 2,000 feet elevation. For
operation at elevations above 2,000 feet,
manufactured to specified deration condi-
tions for Canada and the United States.
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
Forconvenienceandefficiency,installfurnace:
LOCATING FURNACE
INSTALLATION
• where there is easy access for operation,
inspection, and service
This furnace is designed to be mounted in a
wallthatis4to18inchesthick.Youcanalso
mount furnace in a window.
Mounting hardware needed to mount fur-
nace into wall is included with the furnace.
No venting material is needed. You must
furnish tools and all gas piping from the gas
source to the furnace inlet.
• in a central location, near an electrical
outlet
• where there is adequate clearance around
vents outside
WARNING: Do not install fur-
naceininteriorwallofbuilding.You
must install furnace in exterior wall
of building. Rear of furnace must
extend into open, outside air. This
letspoisonousexhaustgasesven-
tilate to the outdoors.
WARNING: A qualified ser-
vice person must install furnace.
Have service person inspect fur-
nace before use and at least an-
nually. Follow all local codes.
Before installing furnace, inspect the wall,
floor, and outside areas. Make sure there are
nopipes,wiring,oranythingelsethatwould
interferewithfurnaceinstallation.Ifyouare
installing thermostat in a wall, make sure
there are no pipes or wiring in the hollow
wallabovethefurnace.Thethermostatwires
will pass through this wall from the attic.
NOTICE: This furnace must be
electrically grounded. Follow all
local codes. In the absence of
local codes, follow the National
Electric Code, ANS/NFPA 70
(U.S.)orCanadianElectricalCode
Part I-CSA C22.1 (Canada).
WARNING: Turn off electrical
circuitsthatpassthroughthewall
where you are going to install the
furnace.
Minimum Clearances
Provide the following minimum clearances
from furnace front cover to combustibles
(as viewed from the front of furnace, see
Figure 1):
WARNING:Maintainthemini-
mumclearancesshowninFigure
1.Ifyoucan,providegreaterclear-
ances from floor, ceiling, and
joining wall.
Below Front Cover: 6 inches
Above Front Cover: 12 inches
Adjoining Wall: 12 inches
Front: 8 feet
CHECK GAS TYPE
Use only propane/LP gas. If your gas sup-
ply is not propane/LP gas, do not install
furnace. Call dealer where you bought fur-
nace for proper type furnace.
Ceiling
WARNING: Due to high tem-
peratures,neverinstallthefurnace:
12" Minimum
12"
Minimum
INSTALLATION ITEMS
Before installing furnace, make sure you
have all items below:
Adjacent
Side
• in an inside wall
• in a recreation vehicle
• inawindowrecessedinathick
wall (creating an alcove)
• in an alcove
• behind a door or where an open
doorwouldblocknormalairflow
• as a fireplace insert
• in high traffic areas
• near furniture or draperies
• in windy or drafty areas
Wall
• electric drill
• drill bits
6" Minimum
• Phillips screwdriver
• hammer
Finished Floor, Carpet, Tile, etc.
• pipe wrench
Figure1-MountingClearancesasViewed
from Front of Furnace
• stud locator or small finishing nails
• equipment shutoff valve (supplied)
The clearance between the cabinet and the
wall it passes through is 0 inches.
• test gauge connection (see Figure 15,
page 10)
Provide the following minimum clearances
from furnace cabinet (portion of cabinet
extending into outside air, as viewed from
the rear of furnace) to obstructions:
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• ground joint union
• sediment trap
CAUTION: If you install the
furnace in a home garage, locate
furnacewheremovingvehiclewill
not hit it.
Cabinet Back: 36 inches
Cabinet Sides: 6 inches
• tee joint
Cabinet Bottom: Must be high enough
off the ground to prevent snow, water,
leaves, oranyotherobjectsfromblock-
ing vents.
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OWNER’S MANUAL
cabinet flange.
2. Secure furnace to wall with toggle bolts
or hook bolts set in mortar.
INSTALLATION
5. 25,000 BTU/Hr Model: Use a proper-
(Continued)
sized drill bit. Drill holes through wall 3. Insert furnace into opening. Do this
and into studs at marked locations.
from inside the room. Secure furnace
to wall with toggle bolts or hook bolts.
CREATING WALL OPENING
AND MOUNTING FURNACE
40,000 BTU/Hr Model: Use a proper-
sized drill bit. On wall stud side of 4. On outside of wall, caulk opening be-
opening, drill holes through wall and
into studs at marked locations. On other
side, drill holes through wall material.
tween the cabinet and the rough edges
of opening. You can also use mortar to
seal opening.
Remove furnace front cover. Remove the
twoscrewsattheloweredgesoffrontcover.
Lift front cover away.
6. Insert furnace into opening. Do this
from inside the room. Secure furnace
to wall with four large screws provided.
INSTALLING THERMOSTAT
Installing in Normal Frame Wall
The25,000BTU/Hrmodelisdesignedtofit
between two wall studs set at 16 inch on
center. The 40,000 BTU/Hr model will not
fit between wall studs. Follow the steps
below to install.
WARNING: Unplug furnace
before installing thermostat.
7. On outside of wall, caulk opening be-
tween the cabinet and the rough edges
of opening.Wall Studs
Mount the thermostat directly on the fur-
naceoronawallinanotherpartoftheroom.
If you have solid or masonry walls, mount
the thermostat on the furnace.
1. Turn off electrical circuits that pass
through mounting wall. Make sure
there are no pipes or electrical wires in
area you intend to cut.
14 1/4
"
Approx.
Screw
Approx.
Screw
Locations
Mounting Thermostat to Furnace
1. Unplug furnace.
2. Use stud locator or small finishing nail
to find wall studs. When you locate
studs, drive a small finishing nail into
each stud. This provides a visual refer-
ence for stud locations.
Locations
2. Locate red and white thermostat wires
coming out of side of furnace. These
wires are labeled “Thermostat.”
Wall
Opening
3. Cut thermostat wires to desired length.
3. 25,000 BTU/Hr Model: Cut an open-
ing in wall between the two studs. Make
opening 14 1/4" wide by 13 5/8" high
(see Figure 2). IMPORTANT: You
must install furnace horizontally. Do
not install furnace vertically.
25,000 BTU/Hr Model
4. Route thermostat wires through slot/
hole in side of thermostat mounting
plate. Then route wires through 5/8"
diameter hole in center of plate (see
Figure 4, page 6).
Wall Studs
20 5/16"
5
40,000 BTU/Hr Model: Cut a 20 /16"
5. Connect thermostat wires to the two
terminal screws on back of thermostat
(see Figure 3). Connect red wire to “R”
terminal. Connect white wire to “W”
terminal.
Approx.
Screw
wide by 14 3/8" high opening in wall (see
Figure 2). Start your cut right next to
stud you are going to anchor cabinet to.
Cut across wall and through the next
stud. Stop cut at proper width.
IMPORTANT:You must install furnace
horizontally. Do not install furnace ver-
tically.
Locations
Wall Opening
40,000 BTU/Hr Model
Figure 2 - Wall Openings and Screw
Locations
4. 25,000 BTU/Hr Model: Mark screw
locations on wall (see Figure 2). Make
sure screws will anchor into studs.
Make sure screw locations match screw
holes on cabinet flange.
White Wire
W
Installing in Masonry Wall
You can mount both models in a masonry
wall. Follow the steps below to install.
1. Cut opening in wall. Make opening 14 1/4"
wide by 13 5/8" high for 25,000 BTU/Hr
models. Make opening 20 5/16" wide by
R
40,000 BTU/Hr Model: Mark screw
locations on wall (see Figure 2). Make
sure screws on one side will anchor into
studs. Screws on other side will only
anchor in wall material. Make sure
screw locations match screw holes on
Red Wire
3
14 /8" high for 40,000 BTU/Hr mod-
els. IMPORTANT: You must install
furnace horizontally. Do not install fur-
nace vertically.
Figure 3 - Connecting Thermostat Wires
to Thermostat
Continued
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
3. Provide two 18-gauge insulated stranded
INSTALLATION
wires for the thermostat wire. Also pro-
vide two wire nuts, and two wall anchors.
There is a red and a white thermostat wire
coming from the furnace. The extra ther-
mostat wires you furnish attach to these
wires. Make sure you furnish a red and a
white wire. This will insure correct
hookup. Purchase enough thermostat wire
to go from the furnace to the thermostat
location. Do not cut and splice this wire.
The thermostat wire must be unbroken.
(Continued)
6. Attach thermostat to thermostat mount-
ing plate with screws provided (see Fig-
ure 4). IMPORTANT: Note mounting
plate position in Figure 4. Correctly
position mounting plate for your model
furnace.
0 0
0
0
0 0
0 0
0 0
0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
40,000 BTU/Hr Models
7. Insert thermostat mounting plate be-
tween wall and cabinet flange. Line up
top notch on mounting plate with top
screw on flange (see Figure 5).
IMPORTANT: Thermostat for 25,000
BTU/Hr model mounts on right side of
furnace (see Figure 5). Thermostat for
40,000 BTU/Hr model mounts on left
side of furnace (see Figure 5).
Routing Thermostat Cable
All wiring must meet local codes. The fol-
lowing instructions cover routing the wire
through the attic. You can run wiring from
a basement or crawl space.
5
0
6
0
7
0
8
0
9
0
S
O
L
ID
S
T
A
T
E
IG
N
50 60 70 80 IT90
N
IO
1. Unplug furnace.
8. Insert screw in cabinet flange and ther-
mostat mounting plate and tighten firmly.
2. Before drilling hole in wall, drive a small
finishing nail through ceiling directly
above thermostat location. Pull nail out
and push a small stiff wire through hole.
This helps you locate thermostat mount-
ing location when in attic.
25,000 BTU/Hr Models
IMPORTANT: Make sure thermostat
wires do not touch combustion chamber.
Figure5-InsertingThermostatMounting
Plate Between Wall and Cabinet Flange
Locating Thermostat on Wall
1. Locate thermostat 4 1/2 to 5 feet above
the floor on an inside wall away from
any heat sources. The thermostat needs
to sense average room temperature.
Avoid the following:
3. In attic, locate stiff wire. Drill 1/2" hole
in center of ceiling wall plate next to
stiff wire. Remove wire.
OFF
4. Probe through drilled hole in wall plate
with a stiff wire to make sure there are
no pipes, wiring, or anything else
blocking the way for thermostat wires.
If you find blockage, choose new loca-
tion for thermostat.
50 60 70 80 90
SOLID STATE
IGNITION
HOT SPOTS
Concealed pipes or ducts
Fireplaces
50 60 70 80 90
40,000 BTU/Hr Models
Registers
TV sets and radios
Lamps or direct sunlight
Kitchen
5. Drill a 1/2" hole through the wall at
thermostat mounting location.
6. From attic, feed thermostat wires
through hole in ceiling plate until wires
reach thermostat location.
COLD SPOTS
Concealed pipes or ducts
Stairwells (drafts) or doors (drafts)
Unheated rooms on other side of wall
OFF
50 60 70 80 90
7. Make a small hook with a piece of stiff
wire. Run wire hook through 1/2" hole
in wall. Hook thermostat wires. Pull
wires through hole in wall. Make sure
6" of wires stick out.
SOLID STATE
IGNITION
50 60 70 80 90
DEAD SPOTS
Behind doors
Corners and alcoves
25,000 BTU/Hr Models
Figure 4 - Attaching Thermostat to
Thermostat Mounting Plate
2. Before installing thermostat, inspect the
wall, floor, and attic areas. Make sure
there are no pipes, wiring, or anything
else that would interfere with install-
ing thermostat. Do not mount thermo-
stat to stud. If there are any obstruc-
tions, choose a new location.
8. Drive a small finishing nail in ceiling
above furnace.
25,000 BTU/Hr Model - Drive nail
above right side of furnace.
40,000 BTU/Hr Model - Drive nail
above left side of furnace.
Pull nail out and push a small stiff wire
through hole. This helps you locate wire
routing location when in attic.
9. Repeat steps 3 and 4 above.
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OWNER’S MANUAL
Wall
Anchors
All piping must comply with local codes
and ordinances or with the National Fuel
Gas Code (ANS Z223.1 NFPA No. 54),
whichever applies.
INSTALLATION
(Continued)
10. Feed thermostat wires from attic to
furnace through 1/2" hole in ceiling
wall plate.
You can connect furnace to gas supply at
front of furnace (inside) or at rear of furnace
(outside).
11. Connect thermostat wires from attic to
thermostat wires on furnace. Connect
red wires together, then connect white
wires together. Use wire nuts to make
connections. IMPORTANT: Make sure
thermostat wires do not touch combus-
tion chamber.
OFF
Connecting Furnace to Gas
Supply at Front of Furnace
1. Locate gas inlet pipe on lower, right
front of furnace (see Figure 8).
50 60 70 80 90
SOLID STATE
IGNITION
50 60 70 80 90
Figure 7 - Mounting Thermostat to Wall
2. Connect 3/8" NPT pipe or nipple to gas
inlet pipe (see Figure 8). See Provid-
ing Gas Piping to Furnace, pages 9 and
10, for correct gas pipe installation.
CONNECTING TO GAS
SUPPLY
Mounting the Thermostat to Wall
1. Connect thermostat wires to the two
terminal screws on back of thermostat
(see Figure 6). Connect red wire to “R”
terminal. Connect white wire to “W”
terminal.
WARNING: A qualified ser-
vice person must connect fur-
nace to gas supply. Follow all
local codes.
2. Push any excess wire back through hole
in wall and plug hole with insulation
to prevent drafts. Drafts affect the ther-
mostat operation.
WARNING: Unplug furnace
before connecting to gas supply.
3. Use thermostat base to mark mounting
screw locations.
4. Drill proper-sized holes for wall anchors.
CAUTION: Use only new,
black iron or steel pipe. Copper
tubing may be acceptable in cer-
tain areas. Check local codes.
Use pipe large enough in diam-
eter to allow proper gas volume
to furnace. If pipe is too small,
undue loss of pressure will oc-
cur. Refer to chart on page 9.
Gas Inlet Pipe
3/8" NPT
Pipe or
Nipple
5. Attach thermostat to wall using screws
provided (see Figure 7).
Figure 8 - Connecting Gas from Inside of
Room
White Wire
W
CAUTION: Lightly apply pipe
joint sealant to male threads be-
fore connecting. Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
R
Red Wire
Figure 6 - Connecting Thermostat Wires
to Thermostat
Continued
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
Remove Screw,
40,000 BTU/Hr
Model Only
11. Run 3/8" pipe or nipple through knock-
out hole. Connect 3/8" pipe or nipple
to manifold elbow (see Figure 14). See
Providing Gas Piping to Furnace,
pages 9 and 10 for correct gas pipe in-
stallation.
INSTALLATION
(Continued)
Connecting Furnace to Gas
Supply at Rear of Furnace
1. Remove the two screws in back of fur-
nace cabinet located by the exhaust
vent(s) (see Figures 9 and 10).
12. Check connections for gas leak.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
toalljoints.Bubblesformingshow
a leak. Correct all leaks at once.
2. Remove two screws on front lower
flange that attach furnace flange to fur-
nace cabinet flange (see Figure 11).
Note: 40,000 BTU/Hr model has a bot-
tom shield (see parts list, page 22, for
location). Removing two screws will
detach bottom shield.
Gas Inlet
Pipe
Manifold Elbow
13. Caulk around pipe or nipple. This pre-
vents cold air entering knockout hole.
Figure 12 - Disconnecting Gas Inlet Pipe
(40,000 BTU/Hr Model Shown)
3. Slide furnace out of furnace cabinet.
4. Locate gas inlet pipe on lower, right
front of furnace.
5. 40,000 BTU/Hr Model Only: Remove
screw holding gas inlet pipe clamp to
furnace.
6. Disconnect gas inlet pipe from 3/8"
manifold elbow. Turn gas inlet pipe
counter-clockwise to disconnect (see
Figure 12).
Figure 9 - Locations of Screws in Back of
Furnace Cabinet (25,000 BTU/Hr Model)
Knockout Plug
7. Rotate the 3/8" manifold elbow 90° so
the opening is pointing downward (see
Figure 12).
Figure 13 - Location of Knockout Plug
8. Locate knockout plug in furnace cabi-
net. Knockout plug is in lower left rear
of furnace cabinet (as viewed from rear,
see Figure 13). Remove knockout plug.
9. Slide furnace back into furnace cabi-
net. Make sure exhaust tube gaskets are
in place. Make sure exhaust and intake
vent tubes extend into vent caps on
back of cabinet. Replace two screws by
exhaust vent(s) removed in step 1.
Figure 10 - Locations of Screws in Back
ofFurnaceCabinet(40,000BTU/HrModel)
3/8" NPT
10. 25,000 BTU/Hr Model: Replace two
screws removed in step 2. Attach fur-
nace flange and furnace cabinet lower
flange together.
Figure 14 - Inserting Pipe through
Knockout Hole
40,000 BTU/Hr Model: Place bottom
shield back in place. Replace two
screws removed in step 2. Attach bot-
tom shield, furnace flange, and furnace
cabinet lower flange together.
Furnace
Flange
Furnace
Cabinet
Flange
Figure 11 - Removing Screws on Lower
Flange (40,000 BTU/Hr Model Shown)
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OWNER’S MANUAL
INSTALLATION
(Continued)
Providing Gas Piping to Furnace
Youmustprovidegaspipingfromgassourcetofurnace. Thegaspipingmustbeinavertical
position where it connects to the furnace. This prevents interference with front cover
installation.
Consult your local gas company for proper routing of the gas lines.
Pipe size is determined by the length of pipe from the gas source to the furnace and the total
BTU load on the gas source.
AddthetotalBTUsrequiredforallappliancesconnectedtothegassourceincludingthisfurnace.
Divide this number by 2500. This will give you the approximate cubic feet per hour needed.
Example:
40,000 BTU/Hr
+ 15,000 BTU/Hr for other gas appliances
55,000 BTU/Hr total
55,000 ÷ 2500 = 22
Locate 22 or higher on chart below.
According to the chart below, you should use 40 feet or less of 3/8" pipe, 125 feet
or less of 1/2" pipe, etc...
MINIMUM
IRON PIPE
SIZE
LENGTH OF PIPE (FEET)
10
20
30
40
50
60
70
80
90 100 125 150 175 200
3/8"
47
87
184
344
696
1060
32
61
26
48
22
42
86
19
37
76
18
33
69
16
30
63
15
28
59
14
26
55
13
25
52
99
12
22
48
86
11
20
42
79
10
18
39
73
—
17
36
66
1/2"
3/4"
1"
126 100
232 189 162 142 129 119 112 106
484 391 331 291 265 245 232 212 202 182 166 149 139
729 590 504 444 404 371 351 324 305 272 252 232 212
11/4
"
"
11/2
2" 2022 1392 1094 961 842 762 696 656 616 576 517 470 430 404
3182 2188 1790 1524 1326 1226 1127 1060 994 928 829 749 969 649
21/2
"
3" 5635 3911 3116 2718 2387 2154 1989 1856 1724 1657 1458 1326 1226 1127
4" 11602 7956 6431 5503 4906 4508 4110 3845 3580 3381 2983 2718 2519 2320
IMPORTANT:Checkgaslinepressureatgasmeterbeforeconnectingfurnacetogasline.Gas
line pressure must be no less than 11 inches of water and no greater than 13 inches of water.
Gas pressures and input to the burners must not exceed the rated input and pressure shown on
the rating plate. For propane/LP gas, manifold pressure should be 10 inches of water. For
elevationsabove2000feet, reducerating4%foreach1000feetabovesealevel(U.S.A. only).
CAUTION: Never connect heater directly to the propane/LP supply.
This heater requires an external regulator (not supplied). Install the
external regulator between the heater and propane/LP supply.
Theinstallermustsupplyanexternalregulator. Theexternalregulatorwillreduceincoming
gas pressure. You must reduce incoming gas pressure to between 11 and 14 inches of water.
If you do not reduce incoming gas pressure, heater regulator damage could occur. Install
external regulator with the vent pointing down. Pointing the vent down protects it from
freezing rain or sleet.
Continued
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
CHECKING GAS
INSTALLATION
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
CONNECTIONS
(Continued)
Installation must include an equipment
shutoffvalve(supplied),groundjointunion,
plugged 1/8" NPT tap, and a sediment trap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
furnace (see Figure 15).
WARNING: Test all gas pip-
ing and connections for leaks
after installation or servicing.
Correct all leaks at once.
Installsedimenttrapinsupplylineasshown
in Figure 15. Locate sediment trap where it
iswithinreachforcleaning.Asedimenttrap
trapsmoistureandcontaminants.Thiskeeps
them from going into furnace controls. If
sediment trap is not installed or is installed
wrong, furnace may not run properly.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
toalljoints.Bubblesformingshow
a leak. Correct all leaks at once.
Install an equipment shutoff valve in an
accessible location. The equipment shutoff
valve is for turning on or shutting off the gas
to the appliance.
IMPORTANT: Locatesedimenttrapwhere
trapped matter will not freeze. Install sedi-
ment trap in a vertical run of pipe. If gas
piping enters furnace from rear (outside),
youmustlocatesedimenttrapincrawlspace
(see Figure 15). If you install furnace in
structure with slab foundation, you must
install gas piping to front of furnace (inside)
(see Figure 15).
Apply pipe joint sealant lightly to male
threads. Prevent excess sealant from going
intopipe. Excesssealantinpipecouldresult
in clogged furnace valves.
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
main gas valve (control valve) and
equipment shutoff valve from gas
supply piping system. Pressures in
excess of 1/2 psig (3.5 kPa) will
damage heater regulator.
2. Cap off open end of gas pipe where
equipment shutoff valve was connected.
Gas Piping
Entering
Furnace
Front
Gas Piping
Entering
Furnace
Rear
3. Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
Equipment
Shutoff Valve
(Inside)
(Inside)
Test Gauge
Connection
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
Equipment
Shutoff
Valve
To Gas Supply
3" Min.
5. Correct all leaks at once.
6. Reconnect furnace and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
Sediment
Trap
To Gas Supply
3" Min.
Test Gauge
Connection
Sediment
Trap
Slab Floor Installation
Crawl Space Installation
Figure 15 - Gas Connection
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OWNER’S MANUAL
CONNECTING TO
ELECTRICAL SUPPLY
ATTACHING CABINET
FRONT COVER
INSTALLATION
(Continued)
IMPORTANT:Followalllocalcodeswhen
connecting electricity to furnace. In the ab-
sence of local codes, refer to the latest edi-
tion of the National Electrical Code ANS/
NFPA No. 70. If you are not familiar with
wiringcodes, haveaqualifiedelectriciando
the wiring.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
CAUTION:Donotoperatefur-
nace with front cover removed or
mounted wrong. If front cover is
mounted wrong, you cannot se-
cure it to cabinet with screws.
1. Close equipment shutoff valve (see Fig-
ure 16).
2. Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
1. Hook top of front cover over top cabi-
net flange.
It is best to plug furnace into a separate and
permanent electrical line circuit.
3. Check all joints from gas meter to
equipment shutoff valve. Apply mix-
ture of liquid soap and water to gas
joints. Bubbles forming show a leak.
2. Secure the sides of front cover to lower
sides of furnace cabinet with two
screws provided (see Figure 17).
1. Supply a 120-volt, 60-cycle, grounded
outlet at furnace location.
2. The furnace has a three-pronged
(grounded) plug. Use only a grounded,
three-prong outlet.
IMPORTANT:Youmayhaveremovedfur-
nace from furnace cabinet during installa-
tion. You must correctly install furnace
within cabinet. If not, front cover will not
properly attach to cabinet. Make sure gas-
kets for intake and exhaust tubes are in
place. Make sure intake and exhaust tubes
extend into vent caps on cabinet back and
are secured with screws. Make sure you
securedflangeonbottomoffurnacetoflange
on bottom front of cabinet.
4. Correct all leaks at once.
Pressure Testing Furnace Gas
Connections
1. Open equipment shutoff valve (see Fig-
ure 16).
IMPORTANT: Some local codes require
rigid or semi-rigid conduit or metallic
sheathe cable. When using a semi-rigid or
metallic sheathe cable, the installer must
terminate the supply wire in the terminal
box opening.
2. Open main gas valve located on or near
gas meter.
3. Make sure control knob of furnace is
in the OFF position.
Performance Check
4. Check all joints from equipment shutoff
valve to gas inlet pipe. Apply mixture
of liquid soap and water to gas joints.
Bubbles forming show a leak.
Plug furnace into three-pronged outlet. If
ignitor remains on after main burner igni-
tion or if the valve chatters, you may have
reversed polarity.
5. Correct all leaks at once.
1. Unplug furnace.
6. Turn on furnace (see Operating Fur-
nace, pages 12 and 13). Check the rest
of the internal joints for leaks.
2. Turn off electricity to outlet.
3. Reverse 120-volt connections inside
outlet.
7. Turn off furnace (see To Turn Off Gas
to Furnace, page 13).
4. Turn on electricity to outlet.
5. Plug in furnace. Ignitor should turn off
after main burner ignites. If ignitor does
not turn off, or if valve continues to
chatter, turn off furnace and unplug.
Call a qualified service person.
Figure 17 - Attaching Front Cover to
Cabinet
On Position
Off Position
Figure 16 - Equipment Shutoff Valve
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
B. BEFORE OPERATING smell all 5. Wait five (5) minutes to clear out any
OPERATING
around the appliance area for gas. Be
sure to smell next to the floor because
some gas is heavier than air and will
settle on the floor.
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation, column 1. If you don’t
smell gas, go to next step.
FURNACE
WARNING: Furnace burner,
WHAT TO DO IF YOU SMELL
GAS
combustion chamber, and ex-
haust port are very hot during
operation. Keep children and
adults away from hot surfaces to
avoid burns and clothing igni-
tion. Carefully supervise young
children when they are in the
same room as furnace. Furnace
will remain hot for a time after
shutdown. Let surface cool be-
fore touching.
6. Turn equipment shutoff valve coun-
• Do not try to light any appliance.
• Do not touch any electric switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
terclockwise
(see Figure 18).
to ON position
7. This furnace is equipped with an ig-
nition device which automatically
lights the burner. Do not try to light
the burner by hand.
8. Plug in furnace.
9. Set thermostat to desired setting. If
thermostat is set above room tem-
perature, the blower will come on.
C. Use only your hand to turn the
handle on the equipment shutoff
valve. Never use tools. If the handle
will not turn by hand, don’t try to
repair it. Call a qualified service tech-
nician. Force or attempted repair
may result in a fire or explosion.
10. Allow approximately 45 seconds for
ignition to occur. When ignition oc-
curs, the glo-bar will stay on for a
short period of time. The flame sens-
ing probe will sense the burner flame
and shut off glo-bar.
WARNING: Do not operate
furnacewithfrontcoverremoved.
Unsafe operation could result.
D. Do not use this appliance if any part
has been under water. Immediately
call a qualified service technician to
inspect the appliance and to replace
any part of the control system and
any gas control which has been un-
der water.
CAUTION: Do not block cir-
culating air openings in the lou-
ver of the front cover. This is
necessary for furnace to operate
properly.
If ignition does not occur within 22
seconds, the ignition control will at-
tempt to light burner three times.This
will take about two minutes. If igni-
tion does not occur, the ignition con-
trol will lock out the glo-bar and valve
circuit. Air in the gas line or a short
gas interruption will prevent furnace
from igniting. If this happens, turn
thermostat off and wait 5 minutes.
Turn the thermostat back on.The fur-
nace will try to ignite again.
NOTICE: If operating furnace for
the first time, a slight odor will
occur. This odor will go away
after a few hours of operation.
OPERATING
INSTRUCTIONS
WARNING: Always follow
lighting instructions. Never at-
tempttolightburnerwithamatch
or butane torch.
FOR YOUR SAFETY
READ BEFORE
LIGHTING
11. If the furnace still does not ignite, fol-
low instructions To Turn Off Gas to
Furnace, page 13. Call a qualified
service person. Do not attempt to re-
start furnace.
1. STOP! Read the safety information,
column 1.
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury, or loss of life.
2. Set the thermostat to lowest setting.
On Position
3. Turn off all electric power to the
furnace.
4. Turn equipment shutoff valve clock-
wise
Figure 18).
to OFF position (see
A. This appliance does not have a pilot.
It is equipped with an ignition device
which automatically lights the
burner. Do not try to light the burner
by hand.
Off Position
Figure 18 - Equipment Shutoff Valve
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OWNER’S MANUAL
microswitch. When the microswitch
activates, the electrical circuit is com-
pleted through the limit switch to the
control module. The glo bar begins to
glow. In about 15 seconds, the glo bar
becomes hot enough to ignite the burner.
OPERATING
INSPECTING
FURNACE
BURNER FLAME
(Continued)
To observe burner flame, remove furnace
front cover. Remove the two screws at the
lower edges of front cover. Lift front cover
away. Locate viewing window on front of
combustion chamber. You can see burner
flame through this window.
TO TURN OFF GAS
4. Another 24-volt circuit is completed
through the module to the main gas
valve. The valve opens. Gas passes
through the valve to the main burner.
The gas is ignited by the glo bar.
TO FURNACE
1. Set thermostat to lowest setting
2. Turn equipment gas valve clockwise
to OFF position. Do not force
equipment gas valve.
Correct Burner Flame: Blue flame with
well-defined burner ports.
5. After the main burner ignites, the flame
detector senses the presence of flame.
This opens the circuit to the glo bar.
The glo bar shuts down.
Incorrect Burner Flame: Yellow or lazy
flame without well-defined burner ports.
3. Unplug furnace if service is to be per-
formed.
If burner flame is incorrect, shut off furnace
and contact a qualified service person.
6. The circulating room air blower pulls
return air in from the living area. This
air is heated as it flows past the com-
bustion chamber. The heated air is then
blown out into the room.
To Shut Down Furnace for an
Extended Period of Time
1. Turn equipment gas valve clockwise
to OFF position. Do not
force equipment gas valve.
7. When the room temperature rises above
the thermostat setting, the circuit to the
valve opens and the burner shuts off.
2. Set thermostat on OFF.
CAUTION:Donottrytoadjust
heatinglevelsbyusingtheequip-
ment shutoff valve.
8. The blower continues to run about two to
three minutes until the time delay relay
coil cools. When the coil cools, the circuit
to the motor opens. The blower shuts off.
Correct Flame
Pattern
Incorrect Flame
Pattern
Figure 19 - Burner Flame Patterns
THERMOSTAT
CONTROL
OPERATION
LIMIT SWITCH
NORMAL
WARNING: Do not operate
furnace without a properly work-
ing limit switch.
The thermostat responds to the room tem- OPERATING
perature. When the room temperature drops
below the thermostat setting, the thermostat
SEQUENCE
turns the furnace burner and blower on.
When the room temperature goes above the
thermostat setting, the thermostat turns the
furnace burner off. The blower will con-
tinue to blow about two to three minutes
after the burner goes out. The thermostat
keeps the room at a constant temperature.
The limit switch will turn off the gas to the
main burner if the furnace becomes too hot.
When this happens, the main burner will go
out and the blower will continue to run for
two to three minutes. This usually happens
when circulating air is partially or com-
pletely blocked.
1. When the room temperature drops below
the thermostat setting, the thermostat calls
for heat. A 24-volt circuit is completed
through the time delay relay coil. After
three to five seconds, the contacts in the
relay close. The blowers come on.
2. One motor drives both the combustion
air blower and the circulating room air
blower. The combustion air blower
draws air from outside through the in-
take air vent. This air discharges into
the combustion chamber. The combus-
tion air blower then forces the combus-
tion products out of the exhaust tube(s).
The Combustion air blower is sealed
so that air does not pass between it and
the circulating room air blower.
Occasional cycling of the limit switch is not
bad. This indicates safe operation. Limit
switch cycling will most likely occur on
warm days. If this happens too often or for
a long period of time, the circulating air
system should be thoroughly cleaned by a
qualified service person.
If the circulating air system is cleaned and
the limit switch continues to shut down the
furnace, the limit switch is defective. A
defective limit switch cannot be repaired. It
must be replaced. For safety reasons, never
operate the furnace without a limit switch.
3. When the blower motor reaches 75% of
normal r.p.m. (three to five seconds), air
from the blower turns on the
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
GASKETS
CLEANING AND
CAUTION: Label all wiring
Inspect all gaskets. If any gaskets show
prior to disconnection when ser-
vicingcontrols.Wiringerrorscan
cause improper and dangerous
operation.
MAINTENANCE
signs of leakage or damage, replace them.
Safe operation of furnace depends on all
gaskets being tight.
WARNING: Turn off and un-
plug furnace and let cool before
cleaning. Turnequipmentshutoff
valve to OFF position. Only a
qualified service person should
service and repair furnace.
Verify proper operation after ser-
vicing.
FRONT COVER
Remove anything that may be blocking the
air to the louvers of the front cover.
CABINET
COMBUSTION CHAMBER
AND MAIN BURNER
Air Passageways
• Use a vacuum cleaner or pressurized air
to clean.
WARNING:Keepfurnaceclear
and free from combustible mate-
rials, gasoline, and other flam-
mable vapors and liquids.
Check flame pattern of main burner often
(see Inspecting Burner Flame, page 13).
Have combustion chamber and main burner
cleaned if you have run the furnace with a
high yellow flame. Incomplete combustion
from lack of air causes the yellow flame.
This deposits soot inside the combustion
chamber and on the burner. Contact a quali-
fied service person to clean combustion
chamber and main burner.
Exterior
• Use a soft cloth dampened with a mild
soap and water mixture. Wipe cabinet
and front cover to remove dust.
CAUTION: You must keep
control areas, burner, and circu-
latingairpassagewaysoffurnace
clean. Inspect these areas of fur-
nace before each use. Have fur-
nace inspected yearly by a quali-
fiedserviceperson.Furnacemay
needmorefrequentcleaningdue
to excessive lint from carpeting,
bedding material, pet hair, etc.
• Use a vacuum cleaner to remove dust
from front cover louvers.
EXHAUST AND INTAKE VENTS
Make sure the exhaust and intake vents are
not blocked. The intake combustion air and
the exhaust gases must be expelled to the
outside.Haveaqualifiedservicepersonclean
dirt and loose debris from vents annually.
OUTSIDE VENT CAPS
Inspectoutsideventcapsforobstructionsor
soot. If soot is found, do not use furnace.
Contact a qualified service person to clean
furnace.
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OWNER’S MANUAL
TROUBLESHOOTING
Note:Alltroubleshootingitemsarelistedin
WARNING: Turn off and unplug furnace and let cool before servic-
ing. Unlessyouneedgassupplyfortesting, shutoffequipmentshutoff
valve before servicing. Only a qualified service person should service
and repair furnace.
order of operation.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
No heat
1. Thermostat off
1. Check to be sure thermostat is calling for heat.
Wire to thermostat could be off terminal
2. Be sure equipment gas valve is in the open posi-
tion (level or parallel to gas line)
2. Gas supply
3. Electrical connections and power
4. Motor
3. Be sure all electrical connections are secure
4. Motor must be operating at top speed before
burner will come on. If blower is not operating
at top speed, check voltage supply (minimum
100 voltsA.C.). If voltage supply is okay, check
for defective motor
5. Malfunctioning microswitch
5. Be sure the microswitch is sailing in far enough
to open the solenoid valve and to energize the
ignition control. If the switch is not sailing in,
clean any dust or dirt from the actuator pin. Other
reasons for the switch not sailing in are
A. Insufficient blower speed - Slow motor due to
faulty motor or lint and dust accumulation on
the blower wheels or restriction of return air to
the furnace
B. Faulty microswitch - Replace switch if cir-
cuit to ignition control is not completed when
switch is manually engaged. Switch should
also be replaced if blower motor running at
top speed fails to engage switch within six or
seven seconds. Note:To service switch, com-
bustion chamber must be pulled out. Follow
steps 1, 2, 3, 9 and 10 on page 8 to remove
combustion chamber
6. Gas valve
6. Within 20 seconds after motor reaches 75% of
its r.p.m. and microswitch engages, check the
following:
A. Voltage at valve - If current is present but
valve is not opening, check wire connections
B. If wire connections okay - Replace valve
C. No voltage at valve - Check circuit completion
through microswitch and limit switch as well
as wiring and wire connections. If no defects
are found, see Ignition Failures, page 16
Continued
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
No heat (continued)
7. Blower not operating
7. A. Check power supply to furnace
B. Check electrical connections at furnace
C. With thermostat points closed, check for cir-
cuit completion at motor. If voltage is present,
replace motor. If no voltage is present at mo-
tor, check for:
•
24 volts on secondary coil or transformer. If
no voltage, replace transformer.
•
If 24 volt transformer okay, check for circuit
completion across contacts on time delay
relay. Allow three to five seconds for con-
tact to close
•
If circuit across contacts okay, check conti-
nuity of wiring in motor circuit
8. Short cycling (motor goes on and off)
8. A. Check thermostat. Contacts should remain
closed. If contacts are breaking:
•
Check thermostat anticipator setting. It
should be between .75 and 1.0
•
If anticipator setting okay, check amp draw
across thermostat. If amp draw exceeds .65,
check amp draw across coil of valve and time
delay relay. Note: On initial operation of glo
bar, there is a momentary surge of approxi-
mately 4.0 amps
•
•
If amp draw is within limits, check for shorts
in thermostat wiring
If wiring is okay, replace thermostat
The electronic system is made up of two
parts: the ignition control and the glo bar.
The ignition control is the brain of the elec-
tronic system. It has several functions:
nition control to a neutral ground.) This
circuit opens the valve, gas flows to the
burner and is ignited by the heat from
the glo bar. Note: Glo bar remains on.
IGNITION FAILURES
WARNINGS:
• Never connect unit or ignition
circuit to 230 volts.
• Never operate unit with glo bar
touching burner or any other
ground. Damage to ignition
control will occur.
• Be sure sensor probe never
touches glo bar. This will dam-
age ignition control.
• If the ignition control is defec-
tive, it must be replaced. It is
not field-repairable.
1. When the blower reaches full r.p.m., a 4. When the burner flame is established,
24-volt circuit is completed to the ig-
nition control. (Check across yellow
and orange wires.)
the sensing probe will sense the pres-
ence of burner flame and open the glo-
bar circuit. The glo bar will then stop
glowing.
2. The red and blue wires at the ignition
control are the 120-volt input for the
glo-bar circuit. When the 24-volt cir-
cuit is completed, the ignition control
will complete the 120-volt circuit to the
glo bar and it begins to glow. (Check
this circuit across the two white wires
at the ignition control.)
It is important to determine the type of
problembeingexperienced.Thentheproper
checkout procedure can be made. The fol-
lowing is a list of problems, how to identify
in which area the problem is located, and
how to correct it.
3. After approximately 20 seconds, a 24-
volt circuit is completed through the ig-
nition control to the gas valve. (This cir-
cuit is checked from brown wire at ig-
CAUTION: Do not attempt to
repair the ignition control. This
may alter it and cause it to oper-
ate incorrectly.
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OWNER’S MANUAL
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Ignition failures
1. Glo bar will not glow - with blower run- 1. Check the following:
ning and microswitch engaged
A. Check for 24 volts A.C. across yellow and
orange wires at ignition control. If no volt-
age, check microswitch and limit switch for
circuit completion as well as wiring and wir-
ing connections
B. Voltage present across yellow and orange wires,
check for 120-volt input to ignition control
across red and blue wires. If no voltage, check
wiring all the way back to power supply
C. 120 volts present across red and blue wires,
check for 120 volts across the two white wires
at ignition control. If no voltage, replace igni-
tion control
D. Voltage present across the two white wires,
check wiring and wire connections to glo bar
E. If wiring and wire connections okay, replace
glo bar. (Glo bar broken)
2. Glo bar glows but burner will not 2. A. Check for voltage (24 volts A.C.) at valve
come on
40 seconds after glo bar begins to glow. If
voltage present but valve not opening, replace
valve
B. If no voltage at valve, check brown wire at
ignition control for continuity and good con-
nection
C. If wire and wire connections okay, replace
ignition control
3. Glo bar operating and gas valve open- 3. A. Check gas flow through burner. If no gas is
ing but burner will not light
coming through burner, check for obstruc-
tion in gas line, main burner orifice, or main
burner
B. If thermostat okay, check for 24 volt A.C.
circuit completion across yellow and orange
wires at ignition control. If no voltage, check
for circuit completion through limit switch
and microswitch
C. If voltage is present at ignition control across
yellow and orange wires yet burner contin-
ues to go off, replace ignition control
4. If the ignitor remains on after main 4. A. If polarity is okay yet burner continues to go
burner ignition or the valve chatters, re-
verse the 120-volt A.C. connections at
the wall receptacle
off, check thermostat to be sure it is still com-
pleting the valve circuit. If not, check for
excessive amp draw in valve circuit
B. If thermostat okay, check for 24 volt A.C.
circuit completion across yellow and orange
wires at ignition control. If no voltage, check
for circuit completion through limit switch
and microswitch
C. Voltage present at ignition control across
yellow and orange wires yet burner contin-
ues to go off, replace ignition control
Continued
201843
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Ignition failures
5. Burner cycles off and glo bar comes on 5. A. Check flame sensing probe. Be sure
immediately, check the following:
probe is positioned in the burner
flame and glowing cherry red. Check
wire and wire connections at probe
and ignition control
B. If wire and wire connections okay,
check for voltage across brown and
orange wires at ignition control. If
no voltage, replace ignition control
C. If voltage present, check wiring and
wire connections at valve
D. If wire and wire connections okay,
replace valve
Excessive noise
1. Blower out of balance
2. Motor hums
1. Replace blower
2. Replace motor
Main burner will not cycle off
1. Thermostat setting
1. Check thermostat
2. Gas valve stuck open
2. Check gas valve. If stuck open, replace.
Do not attempt to repair valve!
Furnace will not operate
1. Wiring connections or shorts
1. Check all wiring to assure proper con-
nection or detect possible shorts
201843
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OWNER’S MANUAL
WIRING DIAGRAMS
REPLACEMENT
PARTS
Limit
Sail Switch
Switch
Thermostat
Red
Note: Use only original replacement parts.
White
Red
Black
1
Junction
Box
Thiswillprotectyourwarrantycoveragefor
parts replaced under warranty.
Green
Brown
2
Ignition
Time Delay
Relay
Control
Black
Green
Black
Black
3
Board
All parts listed herein may be ordered from
your equipment supplier.
Terminal Block
Yellow
4
Orange
Blue
5
6
7
(Open)
When ordering repair parts, always give the
following information:
▲White
White
Black
Yellow
Brown
• model number of your furnace
Transformer
• type of gas, natural or propane/LP
• the replacement part number and de-
scription
370 V.A.C.
Capacitor
5 MFD
Black
Gas Valve
Yellow
White
Brown
White
Probe
♦Black
White
Brown
Brown
SERVICE HINTS
When Gas Pressure Is Too Low
White
White
White
Black
Motor
Note:
Green
Glo-Bar
• glo-bar glows, but burner will not ignite
▲
When Gas Quality Is Bad
• burner will not stay lit
♦
Figure 20 - Wiring Diagram (25,000 BTU/Hr Model)
• burner will produce flames and soot
Limit
Sail Switch
Switch
Youmayfeelyourgaspressureistoolowor
gas quality is bad. If so, contact your local
gas supplier.
Thermostat
White
★
★
White
Red
Black
1
2
3
4
5
Junction
Box
Green
Brown
Ignition
Control
Board
Time Delay
Relay
Black
Green
Black
Black
Terminal Block
TECHNICAL
SERVICE
Yellow
(Open)
Orange
▲White
White
Red
Blue
You may have further questions about in-
stallation, operation, or troubleshooting. If
so, contactyourinstaller, aqualifiedservice
person, or Williams Technical Help Line at
1-800-266-0993.
6
7
Brown
Brown
Black
Transformer
370 V.A.C.
Capacitor
5 MFD
Black
White
Gas Valve
Brown
White
Brown
White
Probe
♦Black
White
Brown
Black
White
Green
White
White
Motor
Note:
Glo-Bar
★
▲
♦
Figure 21 - Wiring Diagram (40,000 BTU/Hr Model)
201843
19
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
This list contains replaceable parts used in your furnace. When ordering parts, follow the
instructions listed under Replacement Parts on page 19 of this manual.
ILLUSTRATED
PARTS LIST
CABINET ASSEMBLY
25,000 BTU/HR MODEL
8
4
5
5
0
6
0
7
0
8
0
9
0
SOLID STATE
IGNITION
50 60 70 80 90
6
1
7
2
3
KEY
NO.
PART
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
8
∆
∆
∆
∆
∆
∆
030643
121520
191240
160912
100892
070509
121224
062242
070542
070508
191244
191246
531010
191263
Front Cover Assembly
Screw, #8 x 3/8" **
Front Cover Trim*
Thermostat
Cabinet Assembly
Cabinet Insulation (right and left sides)
Screw, #10 x 3/4" **
Thermostat Mounting Plate
Cabinet Insulation (back)
Cabinet Insulation (top)
Operating Instructions Decal (English)
Operating Instructions Decal (French)
Warning Decal
1
2
1
1
1
1
4
1
1
1
1
1
1
1
Nameplate
∆ Parts available, not shown.
* You must order nameplate and operating instructions decal separately.
** Standard hardware, can be picked up at local hardware store.
201843
20
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OWNER’S MANUAL
This list contains replaceable parts used in your furnace. When ordering parts, follow the
instructions listed under Replacement Parts on page 19 of this manual.
ILLUSTRATED
PARTS LIST
CABINET ASSEMBLY
40,000 BTU/HR MODEL
5
9
6
4
10
1
7
5
0
6
0
7
0
8
0
9
0
SOLID STATE
IGNITION
50 60 70 80 90
8
2
3
KEY
NO.
PART
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
8
280498
121520
191241
030642
100896
070511
120158
160912
121224
062242
070541
070510
191245
191247
531010
191263
Bottom Shield
Screw, #8 x 3/8" **
Front Cover Trim*
Front Cover Assembly
Cabinet Assembly
Cabinet Insulation (right and left sides)
Screw, #8 x 3/8" **
Thermostat (includes 2 screws)
Screw, #10 x 3/4" **
Thermostat Mounting Plate
Cabinet Insulation (back)
Cabinet Insulation (top)
Operating Instructions Decal (English)
Operating Instructions Decal (French)
Warning Decal
1
2
1
1
1
1
2
1
4
1
1
1
1
1
1
1
9
10
∆
∆
∆
∆
∆
∆
Nameplate
∆ Parts available, not shown.
* You must order nameplate and operating instructions decal separately.
** Standard hardware, available at local hardware store.
201843
21
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
This list contains replaceable parts used in your furnace. When ordering parts, follow the
instructions listed under Replacement Parts on page 19 of this manual.
ILLUSTRATED
PARTS LIST
11
COMBUSTION CHAMBER
ASSEMBLY
7
10
3
25,000 BTU/HR MODEL
14
9
15
16
1
1
2
6
4
19
5
24
7
12
13
17
21
13
20
18
22
27
8
23
26
13
25
22
KEY PART
NO. NUMBER DESCRIPTION
KEY PART
NO. NUMBER DESCRIPTION
QTY.
QTY.
1
2
121357
231955
Screw, #6 x 5/8" **
Wire Harness and
Ignition Control
Ignition Control Mounting
Bracket
Screw, #6 x 1/2" **
Time Delay Relay
Bushing
Screw, #8 x 3/8" **
Limit Switch
Terminal Block
Screw, #10 x 3/4" **
Gasket
Transformer Assembly
Screw, #10 x 3/8" **
4
14 020983
Combustion Chamber/
Heat Shield Assembly
Heat Shield Gasket
Burner Access Door Gasket
Cover Plate
Glass Disc
Burner Access Door
Bushing with Terminals
Flame Sensing Probe
Screw, #6 x 3/8" **
Junction Box Cover
Screw, #10 x 1/2" **
Glo-Bar Retainer
1
1
1
1
1
1
1
1
2
1
4
1
1
1
1
15 070606
16 070398
17 290141
18 310026
19 030893
20 230844
21 231950
22 121502
23 090211
24 121388
25 063018
3
062461
1
2
1
1
4
1
1
2
1
1
6
4
5
6
7
8
9
121372
230625
230218
120158
230825
231144
10 121224
11 070487
12 231143
13 121252
26 100980-01 Glo-Bar
27 070909 Glo-Bar Gasket
** Standard hardware, available at your local hardware store.
201843
22
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OWNER’S MANUAL
This list contains replaceable parts used in your furnace. When ordering parts, follow the
instructions listed under Replacement Parts on page 19 of this manual.
ILLUSTRATED
PARTS LIST
COMBUSTION CHAMBER
ASSEMBLY
21
22
19
40,000 BTU/HR MODEL
4
22
20
14
18
16
17
15
21
16
20
23
24
25
16
26
13
4
16
30
27
12
7
29
16
6
28
4
10
16
8
11
31
9
29
3
1
5
1
2
KEY PART
NO. NUMBER DESCRIPTION
KEY PART
NO. NUMBER DESCRIPTION
QTY.
QTY.
1
2
3
4
5
6
7
8
9
121502
231950
063018
120158
030891
121388
310026
290141
070398
Screw, #6 x 3/8" **
2
1
1
6
1
4
1
1
1
1
1
1
1
18 062563
Ignition Control Mounting
Bracket
Wire Harness and
Ignition Control
Screw, #6 x 5/8" **
Screw, #10 x 3/4" **
Gasket
Screw, #6 x 1/2" **
Terminal Block
Time Delay Relay
Transformer Assembly
Transformer and Relay
Mounting Bracket
Wire Clamp, 5/8" Diameter
Strain Relief Bushing
Junction Box Cover
Screw, #10 x 1/4" **
Flame Sensing Probe
Glo-Bar Retainer
Screw, #8 x 3/8" **
Burner Access Door
Screw, #10 x 1/2"
Glass Disc
1
19 231954
1
4
4
2
2
1
1
1
20 121357
21 121224
22 070487
23 121372
24 231144
25 230625
26 231164
27 062837
Cover Plate
Burner Access Door Gasket
10 100980-01 Glo-Bar
11 070909
12 230844
13 070607
14 020982
Glo-Bar Gasket
Bushing with Terminals
Heat Shield Gasket
Combustion Chamber/Heat
Shield Assembly
Wire Clamp
Screw, #10 x 3/8" **
Limit Switch
1
5
2
1
2
28 062694
29 230555
30 090211
31 121577
1
2
12
1
15 061663
16 121252
17 230560
** Standard hardware, available at your local hardware store.
201843
23
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
This list contains replaceable parts used in your furnace. When ordering parts, follow the
instructions listed under Replacement Parts on page 19 of this manual.
ILLUSTRATED
PARTS LIST
BURNER ASSEMBLY
25,000 BTU/HR MODEL
4
5
7
3
9
6
8
2
10
1
11
12
KEY
NO.
PART
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
8
120717
121459
010701
180215
121388
070408
171174
170545
160969
170012
171170
170082
Hex Nut, #10-24 **
Screw, #10-24 x 1/2" **
Burner Assembly
Main Burner Orifice
Screw, #10 x 1/2" **
Manifold Gasket
Manifold Assembly
Reducer Fitting, 3/8" NPT to 1/8" NPT **
Valve
2
2
1
1
4
1
1
1
1
1
1
1
9
10
11
12
90° Street Elbow **
Gas Inlet Pipe
90° Elbow **
** Standard hardware, available at your local hardware store.
201843
24
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OWNER’S MANUAL
This list contains replaceable parts used in your furnace. When ordering parts, follow the
instructions listed under Replacement Parts on page 19 of this manual.
ILLUSTRATED
PARTS LIST
BURNER ASSEMBLY
40,000 BTU/HR MODEL
5
7
4
6
8
6
2
9
10
3
12
1
11
13
KEY
NO.
PART
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
8
120717
010621
010623
070591
171167
180188
121388
160969
170012
171170
121388
062180
170082
Hex Nut, #10-24 **
Left Burner Assembly
Right Burner Assembly
Manifold Gasket
Manifold Assembly
Main Burner Orifice
Screw, #10 x 1/2" **
Valve
90° Street Elbow **
Gas Inlet Pipe
Screw, #10 x 1/2" **
Gas Inlet Pipe Clamp
90° Elbow **
4
1
1
1
1
2
6
1
1
1
1
1
1
9
10
11
12
13
** Standard hardware, available at your local hardware store.
201843
25
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THE COMFORT PRODUCTS PEOPLE
DIRECT-VENT PROPANE/LP GAS HEATER
This list contains replaceable parts used in your furnace. When ordering parts, follow the
instructions listed under Replacement Parts on page 19 of this manual.
ILLUSTRATED
PARTS LIST
23
BLOWER ASSEMBLY
25,000 BTU/HR MODEL
21
25
24
14
22
17
19
23
18
20
16
17
4
3
15
5
6
17
2
7
12
13
8
11
9
1
10
KEY PART
NO. NUMBER DESCRIPTION
KEY PART
NO. NUMBER DESCRIPTION
QTY.
QTY.
16 070386
Combustion Air Housing
Gasket
Motor with Bushings
Motor Support Bracket
Hex Nut, #10-24 (keps)
Tinnerman
Combustion Air Wheel
Combustion Air Housing
(outside)
Screw, #8 x 1/2"
Capacitor
Capacitor Clamp
Equipment Shutoff Valve
1
2
3
4
5
6
7
8
9
350086
121252
121247
230510
070537
121661
390260
121421
050751
Room Air Wheel
Screw, #10 x 3/8"**
Screw, #2-56 x 5/8"**
Microswitch Assembly
Gasket
1
5
2
1
1
2
1
3
1
4
2
2
1
1
1
1
1
2
1
1
17 231389
18 062307
19 120717
20 121712
21 350117
22 390240
Tinnerman Nut
Blower Housing (room air)
Hex Lock Nut, #10-24**
Crossover Tube
Screw, #10 x 1/2"**
Crossover Tube Gasket
Screw, #10-24 x 1/2"**
Universal Bushing
Capacitor Boot
1
10
1
1
1
23 120615
24 231036
25 062633
10 121388
11 070385
12 121227
13 070362
14 231231
15 390296
∆
161093
Combustion Air and Motor
Cover Assy. Housing
1
∆ Part available, not shown.
** Standard hardware, available at your local hardware store.
201843
26
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OWNER’S MANUAL
This list contains replaceable parts used in your furnace. When ordering parts, follow the
instructions listed under Replacement Parts on page 19 of this manual.
ILLUSTRATED
PARTS LIST
2
BLOWER ASSEMBLY
40,000 BTU/HR MODEL
26
23
20
22
27
10
6
25
28
21
8
24
7
5
14
24
9
2
17
16
13
18
5
15
19
4
11
3
12
2
1
KEY PART
NO. NUMBER DESCRIPTION
KEY PART
NO. NUMBER DESCRIPTION
QTY.
QTY.
1
070570
Combustion Air Cover
Gasket
Screw, #10 x 3/8" **
Room Air Wheel
(CW Rotation)
Room Air Blower Housing
(left side)
Hex Nut, #10-24 (keps) **
Tinnerman Nut
15 121227
16 070362
17 070406
Screw, #10-24 x 1/2" **
Universal Bushing
Combustion Air Housing
Gasket
Screw, #8 x 3/8" **
Wire Clamp
Capacitor
Capacitor Clamp
Capacitor Boot
Room Air Wheel
(CCW Rotation)
Motor with Bushings
Motor Support Bracket
Motor Gasket
Combustion Air Wheel
Room Air Blower Housing
(right side)
2
1
1
8
2
3
121252
350088
1
10
1
1
1
1
18 120158
19 061663
20 231036
21 062691
22 231231
23 350087
4
390328
1
5
2
1
2
1
1
1
3
5
6
7
8
9
120717
121661
230681
121247
070537
1
Microswitch Assembly
Screw, #2-56 x 5/8" **
Gasket
1
1
1
1
1
24 231136
25 062307
26 070165
27 350085
28 390201
10 120615
11 390205
12 121388
13 070420
Screw, #8 x 1/2" **
Combustion Air Cover Assy.
Screw, #10 x 1/2" **
Combustion Air Crossover
Gasket
Combustion Air and Motor
Cover Assembly
1
1
1
1
14 390318
∆
161093
Equipment Shutoff Valve
∆ Part available, not shown.
** Standard hardware, available at your local hardware store.
201843
27
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WARRANTY INFORMATION
KEEP THIS WARRANTY
Model ____________________________________
Serial No. _________________________________
Date Purchased ____________________________
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty.
We make no other warranty, expressed or implied.
LIMITED WARRANTY
WILLIAMS GAS WALL FURNACE
Williams Furnace Company warrants this product to be free from defects in materials and components for one (1) year and five (5) years
on the combustion chamber/heat exchanger assembly from the date of first purchase, provided that the product has been properly
installed, operated and maintained in accordance with all applicable instructions. To make a claim under this warranty the Bill of Sale
or cancelled check must be presented.
Thiswarrantyisextendedonlytotheoriginalretailpurchaser.Thiswarrantycoversonlythecostofpart(s)requiredtorestorethisfurnace
to proper operating condition. Warranty part(s) MUST be obtained through authorized dealers of this product who will provide original
factory replacement parts. Failure to use original factory replacement parts voids this warranty. The furnace MUST be installed by a
qualified installer in accordance with all local codes and instructions furnished with the unit.
This warranty does not apply to parts that are not in original condition because of normal wear and tear, or parts that fail or become
damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by improper installation. Travel, diagnostic cost,
labor, transportation and any and all such other costs related to repairing a defective furnace will be the responsibility of the owner.
TOTHEFULLEXTENTALLOWEDBYTHELAWOFTHEJURISDICTIONTHATGOVERNSTHESALEOFTHEPRODUCT;
THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURA-
TION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE TO ONE (1) YEAR FROM THE DATE OF FIRST PURCHASE; AND WILLIAMS FURNACE
COMPANY’SLIABILITYISHEREBYLIMITEDTOTHEPURCHASEPRICEOFTHEPRODUCTANDWILLIAMSFURNACE
COMPANYSHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential
damages, so the above limitation on implied warranties, or exclusion or limitation on damages may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.
For information about this warranty write:
THE COMFORT PRODUCTS PEOPLE
225 Acacia Street
Colton, CA 92324 U.S.A.
800-266-0993 • 909-825-0993
201843
Rev. D
201843
05/00
NOT A UPC
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