Empire Heating Systems GWT-25W-2 Quick start guide

Page 1
WARNING
If not installed, operated and maintained
in accordance with the manufacturer's
instructions, this product could expose you
to substances in fuel or from fuel combustion
which can cause death or serious illness.
WARNING
FIRE OR EXPLOSION HAZARD
If the information in these instructions is

may result causing property damage,
personal injury or loss of life.
— Do not store or use gasoline or other


— WHAT TO DO IF YOU SMELL GAS
 
 
do not use any phone in your building.
 
 
from a neighbor’s phone. Follow
the gas supplier’s instructions.
 

 


INSTALLER:

CONSUMER:
Retain this manual for future reference.
GRAVITY VENTED SINGLE
WALL FURNACE
MODELS
GWT-25W-2 GWT-35W-2
INSTALLATION INSTRUCTIONS
AND OWNER'S MANUAL

37409-6-0919Page 2
SECTION PAGE
Important Safety Information .......................................................................................................................................3
Safety Information for Users of Propane Gas .............................................................................................................4
Introduction...............................................................................................................................................................5-6
Specications ..............................................................................................................................................................6
Recommended Vent Conguration .............................................................................................................................7
Gas Supply..................................................................................................................................................................8
Clearances .................................................................................................................................................................9
Ventilation and Combustion Air ...................................................................................................................................9
Location - All Models ...................................................................................................................................................9
Rough-In Instructions .............................................................................................................................................9-10
Finishing Instructions............................................................................................................................................10-11
On/Off Device............................................................................................................................................................12
Lighting Instructions ..................................................................................................................................................13
Vent Safety Shutoff System.......................................................................................................................................14
Proper Main Burner Flame ........................................................................................................................................14
Proper Pilot Flame.....................................................................................................................................................14
Troubleshooting.........................................................................................................................................................15
Parts List ...................................................................................................................................................................16
Parts View ................................................................................................................................................................17
Optional Blower Installation Instructions ..............................................................................................................18-20
Appliance Service History .........................................................................................................................................21
Master Parts Distributor List ......................................................................................................................................22
How To Order Repair Parts .......................................................................................................................................22
Warranty....................................................................................................................................................................23
TABLE OF CONTENTS

37409-6-0919 Page 3
Due to high temperatures the appliance should be

draperies.
 
of high surface temperatures and should stay away

 
they are in the same room as the appliance.
 
placed on or near the appliance.
 
an appliance must be replaced prior to operating
the appliance.
 
 Installation and repair should be done by a
QUALIFIED SERVICE PERSON. The appliance
should be inspected beforeuseand atleast annually
      


thatcontrol compartments, burners andcirculating
air passageways of the appliance be kept clean.
 put anything around the furnace that will
      
air.
  keep the appliance area clear and free from


 
damaged parts.
 
Clean and replace damaged parts.
 use this heater if any part has been under

to inspect the heater and to replace any part of the
control system and any gas control which has been
under water.
 

THIS IS A HEATING APPLIANCE
DO NOT OPERATE THIS APPLIANCE WITHOUT OUTER CASING INSTALLED.
IMPORTANT SAFETY INFORMATION

37409-6-0919Page 4
Some people cannot smell well. Some people cannot smell the

can smell the odorant in propane. Smoking can decrease your
ability to smell. Being around an odor for a time can affect your
sensitivity or ability to detect that odor. Sometimes other odors in
the area mask the gas odor. People may not smell the gas odor
or their minds are on something else. Thinking about smelling a
gas odor can make it easier to smell.
The odorant in Propane Gas is colorless, and it can fade under
some circumstances. For example, if there is an underground
leak, the movement of the gas through soil can lter the odorant.
Odorants in Propane Gas also are subject to oxidation. This fading
can occur if there is rust inside the storage tank or in iron gas pipes.
The odorant in escaped gas can adsorb or absorb onto or into walls,
masonry and other materials and fabrics in a room. That will take
some of the odorant out of the gas, reducing its odor intensity.
Propane Gas may stratify in a closed area, and the odor intensity
could vary at different levels. Since it is heavier than air, there may
be more odor at lower levels. Always be sensitive to the slightest
gas odor. If you detect any odor, treat it as a serious leak. Imme-
diately go into action as instructed earlier.
-
sions. In its natural state, propane is odorless and colorless.
You may not know all the following safety precautions which
can protect both you and your family from an accident. Read

members of your household. Someday when there may not

exactly what to do. If, after reading the following information,
you feel you still need more information, please contact your
gas supplier.
•  Your local
Propane Gas Dealer can give you a "Scratch and Sniff" pam-
phlet. Use it to nd out what the propane odor smells like. If
you suspect that your Propane Gas has a weak or abnormal
odor, call your Propane Gas Dealer.
• If you are not qualied, do not light pilot lights, perform ser-
vice, or make adjustments to appliances on the Propane
Gas system. If you are qualied, consciously think about the
odor of Propane Gas prior to and while lighting pilot lights or
performing service or making adjustments.
• Sometimes a basement or a closed-up house has a musty
smell that can cover up the Propane Gas odor. Do not try to
light pilot lights, perform service, or make adjustments in an
area where the conditions are such that you may not detect
the odor if there has been a leak of Propane Gas.
• Odor fade, due to oxidation by rust or adsorption on walls of
new cylinders and tanks, is possible. Therefore, people should
be particularly alert and careful when new tanks or cylinders
are placed in service. Odor fade can occur in new tanks, or
reinstalled old tanks, if they are lled and allowed to set too
long before relling. Cylinders and tanks which have been
out of service for a time may develop internal rust which will
cause odor fade. If such conditions are suspected to exist,
a periodic sniff test of the gas is advisable. 
Propane GasDealer.
Aperiodic sniff test of the Propane Gas is a good safety
measure under any condition.
• If, at any time, you do not smell the Propane Gas odorant and
you think you should, assume you have a leak. Then take the
same immediate action recommended above for the occasion
when you do detect the odorized Propane Gas.
• If you experience a complete "gas out," (the container is un-
der no vapor pressure), turn the tank valve off immediately.
If the container valve is left on, the container may draw in
some air through openings such as pilot light orices. If this
occurs, some new internal rusting could occur. If the valve is
left open, then treat the container as a new tank. Always be
sure your container is under vapor pressure by turning it off
at the container before it goes completely empty or having it
relled before it is completely empty.
• Do not operate electric switches, light matches, use your
phone. Do not do anything that could ignite the gas.
• Get everyone out of the building, vehicle, trailer, or area. Do
that IMMEDIATELY.
• Close all gas tank or cylinder supply valves.
• Propane Gas is heavier than air and may settle in low areas
such as basements. When you have reason to suspect a gas
leak, keep out of basements and other low areas. Stay out
until reghters declare them to be safe.
• Use your neighbor's phone and call a trained Propane Gas
service person and the re department. Even though you may
not continue to smell gas, do not turn on the gas again. Do
not re-enter the building, vehicle, trailer, or area.
• Finally, let the service man and reghters check for escaped
gas. Have them air out the area before you return. Properly
trained Propane Gas service people should repair the leak,
then check and relight the gas appliance for you.
SOME POINTS TO REMEMBER
NO ODOR DETECTED - ODOR FADE
PROPANE GAS WARNING ODOR
If a gas leak happens, you should be able to smell the gas because of the odorant put in the Propane Gas.
That's your signal to go into immediate action!
SAFETY INFORMATION FOR USERS OF PROPANE GAS

37409-6-0919 Page 5
Introduction
Vented wall furnace is shipped ready to install in a 2" x 4" stud wall,
with studs 16" (406mm) center to center. Always consult your local
Building Department regarding regulations, codes or ordinances
which apply to the installation of a vented wall furnace.
Instructions to Installer
1. Installer must leave instruction manual with owner after instal-
lation.
2. Installer must have owner ll out and mail warranty card sup-
plied with furnace.
3. Installer should show owner how to start and operate furnace.
Warning:
Any change to this furnace or its control can be dangerous.
This is a heating appliance and any panel, door or guard

to operating the appliance.

General Information
This series is design certied in accordance with American National
Standard / CSA Standard Z21.86 and CSA 2.32 by the Canadian
Standards Association, as a Vented Wall Furnace and must be
installed according to these instructions.
Any alteration of the original design, installed other than as
shown in these instructions or use with a type of gas not
shown on the rating plate is the responsibility of the person
and company making the change.
Important
All correspondence should refer to complete Model No., Serial No.
and type of gas.
NOTICE: During initial ring of this furnace, its paint will bake out
and smoke will occur. To prevent triggering of smoke alarms, ven-
tilate the room in which the furnace is installed.
Installation in Residential Garages
Gas utilization equipment in residential garages shall be installed
so that all burners and burner ignition devices are located not less
than 18" (457mm) above the oor.
Such equipment shall be located, or protected, so it is not subject
to physical damage by a moving vehicle.

Installation and replacement of gas piping, gas utilization equipment
or accessories and repair and servicing of equipment shall be
performed only by a qualied agency. The term "qualied agency"
means any individual, rm, corporation or company which either in
person or through a representative is engaged in and is responsible for
(a) the installation or replacement of gas piping or (b) the connection,
installation, repair or servicing of equipment, who is experienced in
such work, familiar with all precautions required and has complied
with all the requirements of the authority having jurisdiction.
Commonwealth of Massachusetts: The installation must be
made by a licensed plumber or gas tter in the Commonwealth
of Massachusetts.
The installation must conform to local codes or, in the absence of
local codes, with the National Fuel Gas Code ANSI Z223.1/NFPA
54* Natural Gas and Propane Installation Code, CSA B149.1.
*Available from the American National Standards Institute, Inc., 11
West 42nd St., New York, N.Y. 10036.
High Altitudes
For altitudes/elevations above 2,000 feet (610m), input ratings
should be reduced at the rate of 4 percent for each 1,000 (305m)
feet above sea level. Canadian High Altitudes for locations having
an elevation above mean sea level between 2,000 feet (610m) and
4,500 feet (1370m), the manifold pressure is to be decreased from
3.5" w.c. (.871kPa) to 3.0" w.c. (.747kPa) for Natural Gas and from
10.0" w.c. (2.49kPa) to 8.0" w.c. (1.992kPa) for Propane Gas.
INTRODUCTION

37409-6-0919Page 6
SPECIFICATIONS
Model GWT-25W GWT-35W
Input BTU/HR (KW/H) 25,000 (7.3) 35,000 (10.3)
Height
66 1/8" (1679mm) 71 7/8" (1826mm) with blower 66 1/8" (1679mm) 71 7/8" (1826mm) with blower
Width 16" (406mm) 16" (406mm)
Depth 6" (152mm) 6" (152mm)
Gas Inlet Pipe 1/2" 1/2"
Vent Pipe Type B Oval 4" (102mm) 4" (102mm)
Accessories
Blower Kit GWTB2W GWTB2W
Rear Register Kit GWTR1W GWTR1W
Out-of-the-Wall Kit GWTW2W GWTW2W
Attention: When the GWTW-2, Out-of-the-Wall kit is used the GWTR-1 Rear Register kit cannot be used.
INTRODUCTION (CONT'D)

Part Number Description Used On
17089 Propane to Natural GWT25W-2LP
17088 Natural to Propane GWT25W-2NAT
17091 Propane to Natural GWT35W-2LP
17090 Natural to Propane GWT35W-2NAT
When an existing Category 1 heater is removed or replaced,
the original venting system may no longer be sized to
properly vent the attached appliances. Instructions shall
also indicate effects of an improperly sized venting system
(formation of condensate, leakage, spillage, etc.) and shall
specify the following test procedure:
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each
      
placed into operation could result in carbon monoxide
poisoning or death.
The following steps shall be followed for each
      
placed into operation, while all other appliances

1. 
2.        

Gas Code, ANSI Z223.1/NFPA 54 or the Natural
Gas and Propane Installation Code, CSA B149.1
and these instructions. Determine that there is no
blockage or restriction, leakage, corrosion and

condition.
3. As far as practical, close all building doors and
windows and all doors between the space in which

are located and other spaces of the building.
4. 
5. Turn on clothes dryers and any appliance not
       
exhaust fans, such as range hoods and bathroom
exhausts, so they are operating at maximum
speed. Do operate a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance
being inspected into operation. Adjust the
thermostat so appliance is operating continuously.
7.       
appliances at the draft hood relief opening after 5

of a match or candle.
8. 

in accordance with National Fuel Gas Code, ANSI
Z223.1/NFPA 54 and/or Natural Gas and Propane
Installation Code, CSA B149.1.
9. After is has been determined that each appliance
connected      
      
     
      


37409-6-0919 Page 7
NOTICE: No vent equipment supplied with furnace.

1. Type B-1 oval pipe
2. Single story type B-1 gas vents require a baseplate and one
pair of ceiling plate spacers.
3. Multi-story type B-1 gas vents require a baseplate, one pair
of ceiling plate spacers at the rst oor ceiling and one pair of
re stop spacers at each successive ceiling level.
Type B-W gas vent pipe is available for single story or multi-story
installations. Type B-W gas vent pipe is to be used with the Listed
base plate, ceiling plate spacers and re stop spacers.
Insulated Vent Enclosure
Gravity vented wall furnaces installed in buildings with at roofs can
have poor venting. The cold vent pipe will have a delay in proper
venting and cause the wall furnace to shut "off" by the vent safety
switch. To prevent delayed venting as well as condensation of ue
products an insulated vent enclosure is recommended.
Use Type B vent pipe and maintain at least a one inch (25mm)
clearance to combustibles.
Use metal thimble to protect vent pipe as it passes through
combustibles.
Baseplate Gasket is factory installed on header. Baseplate attaches
to header with screws. B-vent snaps into and is attached to baseplate.
Minimum height of vent pipe must be six feet (1.8m) above header.
Stud space around gas vents must be free of obstructions and
building paper.
Uninsulated Single-Wall Metal Pipe shall not be used outdoors in
cold climates for venting gas utilization equipment.
Attention: The main burner uses room air for combustion. As the
gas/air mixture is injected into the main burner, there is also the
ow of dust and lint particles into the main burner.
Dust and lint accumulation inside the main burner will result in a
yellow main burner ame and possible sooting inside the combus-
tion chamber and vent pipe. To clean main burner refer to Page
13, "Proper Main Burner Flame."
RECOMMENDED VENT CONFIGURATION

37409-6-0919Page 8
Check all local codes for requirements, especially for the size and
type of gas supply line required.
Recommended Gas Pipe Diameter
Pipe
Length
Schedule 40 Pipe
Inside Diameter
Tubing, Type L
Outside Diameter
Natural Propane Natural Propane
0-10 feet
0-3 meters
1/2”
12.7mm
3/8”
9.5mm
1/2”
12.7mm
3/8”
9.5mm
10-40 feet
4-12 meters
1/2”
12.7mm
1/2”
12.7mm
5/8”
15.9mm
1/2”
12.7mm
40-100 feet
13-30 meters
1/2”
12.7mm
1/2”
12.7mm
3/4”
19mm
1/2”
12.7mm
100-150 feet
31-46 meters
3/4”
19mm
1/2”
12.7mm
7/8”
22.2mm
3/4”
19mm
NOTICE: Never use plastic pipe. Check to conrm whether your
local codes allow copper tubing or galvanized.
NOTICE: Since some municipalities have additional local codes, it
is always best to consult your local authority and installation code.
Installing a New Main Gas Shut-Off
Each appliance should have its own manual gas shut-off.
A manual main gas shut-off should be located in the vicinity of the
unit. Where none exists, or where its size or location is not adequate,
contact your local authorized installer for installation or relocation.
Compounds used on threaded joints of gas piping shall be resistant
to the action of liqueed petroleum gases. The gas lines must be
checked for leaks by the installer. This should be done with a soap
solution watching for bubbles on all exposed connections, and if
unexposed, a pressure test should be made.




A gas valve and ground joint union should be installed in the gas
line upstream of the gas control to aid in servicing. It is required by
the National Fuel Gas Code that a drip line be installed near the gas
inlet. This should consist of a vertical length of pipe tee connected
into the gas line that is capped on the bottom in which condensation
and foreign particles may collect.
Figure 1
The use of the following gas connectors is recommended:
— ANS Z21.24Appliance Connectors of Corrugated Metal Tubing
and Fittings
— ANS Z21.45Assembled FlexibleAppliance Connectors of Other
Than All-Metal Construction
The above connectors may be used if acceptable by the authority
having jurisdiction. The Commonwealth of Massachusetts requires
that a exible appliance connector cannot exceed three feet in length.
Pressure Testing of the Gas Supply System
1. To check the inlet pressure to the gas valve, a 1/8" (3.175mm)
N.P.T. plugged tapping, accessible for test gauge connection,
must be placed immediately upstream of the gas supply
connection to the appliance.
2. The applianceand its individualshutoff valvemust be disconnected
from the gas supply piping system during any pressure testing of
that system at test pressures in excess of 1/2 psig (3.5 kPa).
3. The appliance must be isolated from the gas supply piping system
by closing its individual manual shutoff valve during any pressure
testing of the gas supply piping system at test pressures equal
to or less than 1/2 psig (3.5 kPa).
Attention! If one of the procedures results in pressures in excess
of 1/2 psig (14" w.c.) (3.5 kPa) on the appliance gas valve, it will
result in a hazardous condition.
Checking Manifold Pressure
Both Propane and Natural Gas valves have a built-in pressure
regulator in the gas valve. Natural Gas models will have a manifold
pressure of approximately 3.5" w.c. (.871kPa) at the valve outlet
with the inlet pressure to the valve from a minimum of 4.5" w.c.
(1.120kPa) for the purpose of input adjustment to a maximum of
10.5" w.c. (2.614kPa) Propane Gas models will have a manifold
pressure approximately 10.0" w.c. (2.49kPa) at the valve outlet
with the inlet pressure to the valve from a minimum of 11.0" w.c.
(2.739kPa) for the purpose of input adjustment to a maximum of
13.0" w.c. (3.237kPa).
A 1/8" (3.175mm) N.P.T. plugged tapping, accessible for test gauge
connection, is located on the outlet side of the gas control.
GAS SUPPLY

37409-6-0919 Page 9
1. In selecting a location for installation, it is necessary to provide
adequate accessibility clearances for servicing and proper
installation.
2. Clearances to combustible surfaces are 4" (102mm) from sides,
12" (305mm) to top, 1 1/2" (38mm) from oor.
NOTE: Minimum distance of 1 1/2" (38mm) must also be maintained
from top surface of carpeting, tile, etc.
Wall furnaces shall be installed in a location in which the facilities
for ventilation permit satisfactory combustion of gas and proper
venting under normal conditions. In buildings of conventional frame,
brick, or stone construction without tight storm windows and doors,
inltration is normally adequate to provide air for combustion and
draft hood dilution.
Where appliances are installed in conned and unconned spaces
within a building, the building being of unusually tight construction,
air for combustion and ventilation must be obtained directly from
outdoors or from such spaces that freely communicate with the
outdoors. Under these conditions, the conned and unconned
spaces shall be provided with two permanent openings, one near
the top of the enclosure and one near the bottom; each opening
shall have a free area of not less than one square inch (6.45cm2)
per 2,000 BTU (.6KW/H) per hour of total input.
Select a location near the center of the space to be heated. Overow
heat will circulate through doorways into adjacent rooms.
For large homes or spread-out oor plans, two or more furnaces are
recommended. Do not locate furnace where a door could swing
over the outer casing, or where circulation could be retarded by
furniture or cabinets.
Do not install in a closet, alcove or small hallway where the furnace
could be isolated by closing doors to the heated space.
When location is selected, check the walls, attic and roof to make sure
there are no obstructions such as pipes, electric wiring, etc., which
would interfere with the installation of the furnace or vent pipe.
NOTE: If Rear Register Kit is to be used, see Rear Register Kit
instructions for location of hole in rear wall. Register outlet
must be cut in wall before furnace is installed.
NOTE: If Optional Blower is to be used, hard wiring must be
completed for the optional blower prior to installation of
header plate.
Provide an opening in the wall 14 1/2" (368mm) wide and 66 1/8"
(168cm) high measured from top of oor plate (See Figure 2 and
Figure 3). Wall depth is to be 2" x 4" framing with 1/4" (6.5mm) to
5/8" (16mm) sheeting. Attach baseplate (not supplied with furnace) to
header plate with sheet metal screws at each end. Attach 4" (102mm)
oval, double wall vent pipe to baseplate. Attach enough vent pipe so
that when installed in wall opening the vent pipe will extend above the
ceiling plate by at least 6" (152mm). Install ceiling spacers according
to manufacturer's instructions. Insert header plate with attached 4"
oval, double wall vent pipe into wall opening. Position header plate
at height shown in Figure 2. Locate rear edge of nailing ange at
the back of the 2" x 4" stud which will center the vent collar in the
wall. Locate the angled edge of header plate ush with the top of
the wall opening. Nail header plate to the wall studs.
CLEARANCES
VENTILATION AND COMBUSTION AIR
LOCATION - ALL MODELS
ROUGH-IN INSTRUCTIONS

37409-6-0919Page 10
62 1/4”
(1581 mm)
14 ½”
(368 mm)
Figure 2
66 1/8”
(1679mm)
WALL
OPENING
Figure 3
Plastering (Figure 4)
In new construction use only plain (not perforated) gypsum lath
around furnace and vent pipe so that plaster "Keys" will not project
into wall space.
Use wood strips nailed to inside of studs and top of bottom plate.
These must be removed before installation of furnace. Lath and
plaster against top projection of Header Plate.
Do not allow wall nish materials to project into furnace recess.
66 1/8”
(1679mm)
WALL
OPENING
14 ½”
(368 mm)
Figure 4
Installing Furnace (Figure 5)
Clear the recess of all debris, and remove any wood plaster-grounds.
Stand the furnace on oor in front of wall opening.
Insert furnace ue into rectangular opening in header plate and
raise furnace carefully (see Figure 5). Swing bottom of furnace into
wall opening with back of legs ush with rear of oor plate. Secure
furnace support legs to the oor plate.
Figure 5
FINISHING INSTRUCTIONS

37409-6-0919 Page 11
Figure 6
IMPORTANT — Avoid securing too tightly and disturbing the inner
casing. Do not try to force furnace into a wall opening which is
smaller than specied dimension.
OUTER CASING (Figure 6)
1. Align 1 3/4" slot on casing bracket with bottom screw hole on
inner casing. Attach casing bracket to inner casing with one (1)
10 x 1/2" screws for each casing bracket. Do not completely
tighten screws at this time.
2. Place outer casing onto header.
Attention: Use center clearance hole on outer casing top for
attachment to header with one (1) 8 x 3/8" Phillips screw when
optional blower is not installed.
Attention: Use outside clearance holes on outer casing top
for attachment to header with two (2) 8 x 3/8" Phillips screws
when optional blower is installed.
3. Align clearance holes on outer casing bottom with screw holes
on casing brackets by adjusting slots on casing brackets.
4. Complete tightening casing bracket screws from Step 1 to inner
casing at this time.
5. Attach outer casing to casing brackets with two (2) 10 x 1-1/2"
screws.
INSTALLING CONTROL DOOR
Attach two washers supplied in hardware package to pivot pins
located at bottom of control door. Install control door to outer cas-
ing assembly.
FINISHING INSTRUCTIONS (CONT'D)

37409-6-0919Page 12
CAUTION — Do not run wire behind anges of Header Plate or in
any location where it might be damaged.
Millivolt wall on/off devices are specially designed for use on self-
generating systems. They shouldbe used on line or low
voltage A.C. circuits.

To install an ON/OFF device (such as a wall switch, remote, toggle
switch,or thermostat), remove the wire nut from the two wires from
the valve. Run additional wire from the valve wires to the ON/OFF
device. Install the ON/OFF device in the same room as the furnace
following the installation instructions supplied with it. In the absence
of instructions, install the ON/OFF device 4 to 5 feet above the oor
on an interior wall not affected by another heating source (i.e. stove
or water heater) or the temperature of an adjoining room..
Proper operation depends on a good pilot ame. The ame must
cover the top of the thermopile. Cleaning of the pilot orice and
burner may be required due to spiders.
System Check (Figure7)
A millivolt meter is required to check the system. The millivolt
readings should be:
• Across the thermopile terminals, 400-450 millivolts with the
heater OFF.
• Across the thermopile terminals, 150-250 millivolts with the
heater ON.
• Across the wires at the valve, less than 30 millivolts with the
heater ON.

ON/OFF DEVICE
TO VENT SAFETY
TO THERMOPILE
TO VENT SAFETY
TO THERMOPILE
TO OPTIONAL
ON/OFF DEVICE
Figure 7

37409-6-0919 Page 13
1. Turn off all electric power (if applicable) to appliance if

 
3. Push in gas control knob slightly and turn clockwise
to "OFF." Do not force.
4. Replace control access panel (control door).
LIGHTING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE LIGHTING
A. This appliance has a pilot which must be lighted by hand.
When lighting the pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around the appliance area


WHAT TO DO IF YOU SMELL GAS
 
 
do not use any phone in your building.
 
phone. Follow the gas supplier's instructions.
   
department.
C. Use only your hand to push in or turn the gas control
           


or explosion.
D. Do not use this appliance if any part has been under water.

the appliance and to replace any part of the control system
and any gas control which has been under water.
1. STOP!
2. Turn off all electric power to the appliance (if applicable).
 
4. Push in gas control knob slightly and turn clockwise
to "OFF."
NOTE:
knob is pushed in slightly. Do not force.
5. Wait ten (10) minutes to clear out any gas. Then smell


smell gas, go to the next step.
6. Find pilot - follow metal tube from gas control. The pilot
is mounted on front of main burner.
7. Turn gas control knob counterclockwise to "PI-
LOT."
8. Push in control knob all the way and
hold in. Immediately light the pilot with
a match. Continue to hold the control
knob in for about one (1) minute after
the pilot is lit. Release knob and it will
pop back up. Pilot should remain lit. If
it goes out, repeat steps 5 through 9.
 -

supplier.
           

technician or gas supplier.
9. Turn gascontrol knob counterclockwise to"ON."
10. Replace control access panel (control door).
11. Turn on all electric power to the appliance (if applicable).
GAS CONTROL KNOB SHOWN IN "OFF" POSITION
LIGHTING INSTRUCTIONS
WARNING

personal injury or loss of life.
TO TURN OFF GAS TO APPLIANCE

37409-6-0919Page 14
This appliance must be properly connected to a venting system.
This appliance is equipped with a vent safety shutoff system.
Warning: Operation of this wall furnace when not connected
        

carbon monoxide (CO) poisoning and possible death.
This furnace is equipped with a manual reset vent safety switch.
The manual reset vent safety switch will cause gas ow to the main
burner to "shut off" due to improper venting or a blocked ue.
To reset the manual reset vent safety switch:
1. Remove outer casing.
2. Depress manual reset button. The manual reset vent safety
switch is located on the draft diverter.
3. Replace outer casing.
If the manual reset vent safety switch continues to "shut off" the gas
ow to the main burner a qualied service person must be contacted
to inspect for improper venting, blockage in the vent pipe or the
manual reset vent safety switch for being defective.
The correct ame will be a short blue inner ame with a much larger
light blue outer ame. The burner does not have a primary air
adjustment. The ame will be proper if the factory-set pressure and
orice are used. After the furnace has begun operating, cleaning
of the burner may be needed for proper ame, examine at least 2
times per season.
To clean burner ports, disconnect the gas supply to the valve. Remove
the burner assembly from the combustion chamber. Remove pilot
burner from main burner and then remove the main burner. Force
water into the ports and blow dry with vacuum cleaner air, or low
pressure compressed air.
The correct ame will be blue, extending past the thermopile. The
ame will surround the thermopile just below its tip.
Natural Gas pilots require adjusting when the inlet gas pressure
is above 5" w.c. (1.245kPa). Remove the pilot cover screw on the
control valve and turn the adjustment screw clockwise to reduce
ame. Replace pilot cover screw to eliminate gas leaking at that
control valve opening.
Propane Gas will not require adjustment.
After use, cleaning may be required for the proper ame.
Examine the pilot ame before and during each heating season.
Figure 9
Figure 10
VENT SAFETY SHUTOFF SYSTEM
PROPER MAIN BURNER FLAME
PROPER PILOT FLAME
WIRES FOR
ON/OFF DEVICE
Figure 8

37409-6-0919 Page 15
GENERAL All furnaces have been re-tested to check for proper
operation. This includes main burner ame, pilot ame, and gas
control operation. If the furnace fails to function on initial installation,
it is advisable to re-check the following:
1. Inlet gas pressure.
2. Type of gas being used and that shown on the rating plate.
Contact your Empire Dealer to assist in servicing furnace.


Disconnect the gas supply at the inlet to the control valve. Remove the
burner assembly to which the above components are attached.
Pilot Does Not Light
With air in the gas line, such as when the furnace is rst installed
or was "OFF" all summer, the pilot ame may be too lean to ignite
on the rst few trials. Turn the gas control knob to PILOT position
and depress the gas control knob. Hold the gas control knob down
to bleed the line;
1. Use lighter rod to light pilot with a match.
If Pilot Does Not Light By Any Means
1. Check gas control knob for being in the "Pilot" position.
2. Check pilot adjustment for being full open (counterclockwise
to open).
3. If gas is available in the supply tubing, the pilot orice and/
or pilot burner is probably restricted by a spider web. Clean
pilot assembly and relight.
If Pilot Does Not Remain "On" After Releasing Gas Control

1. Follow instructions and hold gas control knob down longer
and harder.
2. Determine if pilot ame extends past thermopile; if not, adjust
pilot ame or clean pilot burner.
3. Replace thermopile if millivolt reading is less than 300 millivolts
when wall mounted on/off device or remote bulb is turned
OFF. Replace gas control if magnet dropout millivolt reading
is over 100 millivolts.
Pilot Outage During Normal Operation
1. Check input by manifold pressure gauge or gas meter.
2. Check millivolt output when furnace is in operation. If millivolt
output decreases during furnace operation gas control may
be defective.

Turned "On"
1. Check millivolt output of thermopile.
2. On/off device wires may be broken.
3. On/off device may be defective.
TROUBLESHOOTING

37409-6-0919Page 16
USE ONLY MANUFACTURER'S REPLACEMENT PARTS. USE OF ANY OTHER PARTS COULD CAUSE INJURY OR DEATH.
ATTENTION: When ordering parts, it is very important that part number and description of part coincide.
PARTS LIST
Index
No.
Part
No. Description
1 WFA115 HEADER GASKET
2 36323 HEADER ASSEMBLY
(INCLUDES NO. 1, GASKET)
3GWT182 INNER CASING ASSEMBLY
4GWT065 DIVERTER ASSEMBLY- GWT-25W
4 41048 DIVERTER ASSEMBLY - GWT-35W
5 R3239 VENT SAFETY SWITCH - GWT-25W
5 R3045 VENT SAFETY SWITCH - GWT-35W
6 R3038 ECO LEAD ASSEMBLY
7GWT020 FRONT SHIELD
8GWT077 HEAT SHIELD
9 26463 EXCHANGER ASSEMBLY - GWT-25W
9 26464 EXCHANGER ASSEMBLY- GWT-35W
10 GWT070 BURNER BRACKET ASSEMBLY -
GWT-25W
10 GWT073 BURNER BRACKET ASSEMBLY -
GWT-35W
11 R5245 GAS VALVE - NATURAL
11 R5246 GAS VALVE - PROPANE
12 R3031 BURNER (GWT-25W – 3 REQUIRED)
(GWT-35W – 4 REQUIRED)
13 P8855 BURNER ORIFICE - GWT-25W
NATURAL (3 REQUIRED)
13 P8865 BURNER ORIFICE - GWT-25W
PROPANE (3 REQUIRED)
13 P8854 BURNER ORIFICE - GWT-35W
NATURAL (4 REQUIRED)
13 P8865 BURNER ORIFICE - GWT-35W
PROPANE (4 REQUIRED)
14 GWT169 AIR SHUTTER REAR- GWT-25W
PROPANE
14 GWT012 AIR SHUTTER REAR - GWT-35W
PROPANE
15 GWT054 AIR SHUTTER BOTTOM - GWT-25W
PROPANE
15 GWT049 AIR SHUTTER BOTTOM - GWT-35W
PROPANE
16 GWT168 AIR SHUTTER FRONT - GWT-25W
PROPANE
16 GWT011 AIR SHUTTER FRONT - GWT-35W
PROPANE
17 GWT010 BURNER COMPARTMENT FRONT -
GWT-25W
17 GWT008 BURNER COMPARTMENT FRONT -
GWT-35W
18 DV064 COVER PLATE
19 R3035 PILOT - PROPANE
19 R3034 PILOT - NATURAL
20 GWT021 PILOT BRACKET
21 R1054 THERMOPILE
22 GWT186 CASING BRACKET
23 36328 CASING FRONT ASSEMBLY
(INCLUDES #24)
24 R3763 MAGNET (2 REQUIRED)
25 36321 CASING DOOR ASSEMBLY
26 R885 NYLON WASHER (2 REQUIRED)
27 23906 VALVE SHIELD
28 36354 CASING ASSEMBLY COMPLETE
(INCLUDES #23, #25, & #26)
29 29011 EXCHANGER TUBE SUPPORT
N/S GWT121
PILOT TUBING- GWT-25W W/FERRULES
N/S GWT076 PILOT TUBING- GWT-35W W/FERRULES
N/S R1089 PILOT ORIFICE (HONEYWELL .009
PROPANE GAS ONLY)
N/S R1081 PILOT ORIFICE (HONEYWELL .014
NATURAL GAS ONLY)
N/S GWT190 HARDWARE PACKAGE
N/S R-734 MATCH HOLDER
Index
No.
Part
No. Description

37409-6-0919 Page 17
23
26
25
28
1
2
3
4
6
5
7
8
9
10
27
11
14
13
12
18
15
16
17
19
21
20
24
22
29
PARTS VIEW

37409-6-0919Page 18
Installing Blower Using Three-Prong Plug
1.
Install furnace according to Installation Instructions and
Owner's Manual.
2. Refer to drawing for measurements to locate two mounting
holes on wall surface above furnace.
On Solid Wall
3a. After locating mounting holes, attach two #10 x 1 1/2-inch
screws provided in blower kit into wall. Do not completely
tighten screwheads to wall, leave a 7/16-inch gap between
screwheads and wall.
On Sheet Rock Wall
3b. After locating mounting holes, drill two 5/16-inch diameter
holes into wall. Insert the two plastic expansion anchors into
holes. Insert two #10 x 1 1/2-inch screws provided in blower kit
into two plastic expansion anchors. Do not completely tighten
screwhead to plastic expansion anchors, leave a 7/16-inch gap
between screwheads and plastic expansion anchors. Refer to
Figure 12.
4. At the top of outer casing remove one screw from center
clearance hole that attaches outer casing to header assembly.
Also, remove two screws that attach bottom of outer casing to
inner casing.
5. Pull the outer casing forward approximately 1 inch away from
wall surface.
6. Remove four 8 x 3/8-inch screws that attach blower front to
blower housing. Separate blower front from blower housing.
Remove blower housing by disconnecting fan switch wire
assembly from power cord and motor wire.
        
damage motor coil wires. Damaged coil wires will disable
blower function.
7. P osition blower housing on top of header assembly and route
three-prong cord set between left side of outer casing and
inner casing.
Caution: Blower cord set routing is important. Cord set should
        
routing of cord set may result in damage to cord set.
8. Replace the outer casing to the wall surface.
9. Attach outer casing to header assembly. Attention: The center
clearance hole will not be used. The two outside clearance
holes will be used to attach outer casing to header assembly,
one screw from Step 4 and one screw supplied in hardware
package. Refer to Figure 11.
Figure 11
GWTB2W-1 FOR MODELS
GWT-25W, GWT-35W, GWT-50W
10. Attach outer casing to inner casing with two screws from Step 4.
11. Align key hole slots on back of blower housing with the two
screws attached to wall. Position blower housing ush with
wall surface and on top of outer casing. Complete tightening
blower housing screws from Step 3a or 3b to wall.
12. Attach caps and plugs from blower housing and blower front.
13. Attach blower front to blower housing with four 8 x 3/8-inch
screws from Step 6.
14. Installation of optional blower assembly is completed.
Caution: When installing blower housing onto wall be careful
motor coil is not damaged.
Installing Blower With Hard Wiring
1. When facing the wall opening, install 120 volt electrical outlet
junction box inside wall opening on left wall stud approximately
12 inches above header plate.
2. Refer to drawing for measurements to locate access hole for
electrical wiring on wall surface.
3. After locating access hole, drill a 1/2-inch hole into wall.
4. Route enough eld wiring from 120 volt electrical outlet junction
box through 1/2-inch access hole in wall for connection to blower
housing.
5. Install furnace according to Installation Instructions and Owner's
Manual.
6. Refer to drawing for measurements to locate two mounting
holes on wall surface above the furnace.
On Solid Wall
7a. After locating mounting holes, attach two #10 x 1 1/2-inch
screws provided in blower kit into wall. Do not completely
tighten screwheads to wall. Leave a 7/16-inch gap between
screwheads and wall.
On Sheet Rock Wall
7b. After locating mounting holes, drill two 5/16-inch diameter
holes into wall. Insert two plastic expansion anchors into
holes. Insert two #10 x 1 1/2-inch screws provided in blower kit
into two plastic expansion anchors. Do not completely tighten
screwhead to plastic expansion anchors, leave a 7/16-inch gap
between screwheads and plastic expansion anchors. Refer to
Figure 12.
Figure 12
OPTIONAL BLOWER INSTALLATION INSTRUCTIONS

37409-6-0919 Page 19
Wiring
The appliance, when installed, must be electrically grounded in
accordance with local codes or, in the absence of local codes, with
the National Electrical Code, ANSI/NFPA 70 or Canadian Electrical
Code, CSA C22.1, if an external electrical source is utilized. This


directly into a properly grounded three-prong receptacle. Do
For an
ungrounded receptacle, an adapter, which has two prongs and a
wire for grounding, can be purchased, plugged into the ungrounded
receptacle and its wire connected to the receptacle mounting screws.
With this wire completing the ground, the appliance cord plug can
be plugged into the adapter and be electrically grounded.
WARNING
Unplugging of blower accessory will not stop the heater
from cycling. To shut heater off: Turn temperature dial or
thermostat to lowest setting. Turn knob on gas control to
"OFF," depressing slightly. Do not force.
CAUTION: Label all wires prior to disconnection when


Oiling
The blower motor does not have oiling holes. Do not attempt to oil
the blower motor.
8. Remove three prong cord set from blower housing.
9. Remove four 8 x 3/8-inch screws that attach blower front to
blower housing. Separate blower front from blower housing.
Remove blower housing by disconnecting fan switch wire
assembly from power cord and motor wire.
10. Position blower housing on top of header assembly.
11. Route 120 volt eld wiring into blower housing through cord
set hole on back of blower housing.
12. Refer to wiring diagram to make wiring connections inside blower
housing. Be sure to follow all local and National electrical codes
when making eld wiring connections.
13. Align key hole slots on back of blower housing with two screws
attached to wall. Position blower housing ush with wall surface
and on top of outer casing. Complete tightening blower housing
screws from Step 7a or 7b to wall.
14. Position blower front on top of outer casing and re-connect fan
switch wire assembly to power cord and motor wire.
15. Attach blower front to blower housing with four 8 x 3/8-inch
screws from Step 9.
16. Installation of optional blower assembly is completed.
13”
(330 mm)
4 7/16”
(112.6 mm)
Figure 13
Fan Control
The automatic fan control is located on the bottom of the blower
assembly. The fan control is a nonadjustable, automatic type. The
fan control will require between 3 and 7 minutes of main burner
operation before the fan control "closes" and activates the blower.
The blower will continue to run between 3 and 7 minutes after the
main burner shuts off, before the fan control "opens" and deactivates
the blower.
OPTIONAL BLOWER INSTALLATION INSTRUCTIONS (CONT'D)
GWTB2W WIRING DIAGRAM

37409-6-0919Page 20
PARTS LIST
INDEX NUMBER PART NUMBER DESCRIPTION
1 R2204 CORD SET
2 R1468 STRAIN RELIEF BUSHING
3 36334 BLOWER HOUSING ASSEMBLY
4 R1454 BRASS BUSHING (4 REQUIRED)
5 36338 BLOWER SIDE (2 REQUIRED)
6 R3085 WIRE ASSEMBLY
7 R2503 FAN SWITCH
8 36337 BLOWER FRONT
9 R1499 RUBBER GROMMET (4 REQUIRED)
10 R2804 BLOWER MOTOR
OPTIONAL BLOWER INSTALLATION INSTRUCTIONS (CONT'D)