EMPIRE GWT-25W-2 Gravity VentED Single Wall Furnace Installation Guide

EMPIRE GWT-25W-2 Gravity VentED Single Wall Furnace

Specifications

• Model: GWT-35W-2
• Type: Gravity Vented Single Wall Furnace
• Manufacturer: EMPIRE

Product Usage Instructions

Installation

1. Ensure the appliance is installed by a qualified installer, service agency, or gas supplier.
2. Follow the installation instructions provided in the manual and leave the manual with the appliance for future reference.

Safety Information

1. Do not operate the appliance without the outer casing installed.
2. Place the appliance away from furniture, draperies, and high-traffic areas due to high temperatures.
3. Review safety information for users of LP-Gas to prevent accidents and ensure proper handling of propane gas.

Maintenance

1. Regularly inspect the appliance for any signs of damage or leaks.
2. If you suspect a gas leak, evacuate the area immediately and contact trained LP-Gas service people to repair the leak.

FAQ

Q: Can I operate the furnace without the outer casing?

A: No, it is important not to operate the appliance without the outer casing installed to prevent accidents.

Q: What should I do if I suspect a gas leak?

A: If you suspect a gas leak, evacuate the area immediately, avoid low areas like basements, and contact trained LP-Gas service people to repair the leak.

Q: How often should I inspect the appliance for maintenance?

A: Regularly inspect the appliance for any signs of damage or leaks to ensure safe operation.

• Installer: Leave this manual with the appliance.
• Consumer: Retain this manual for future reference.
• WARNING: If not installed, operated, and maintained under 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: If the information in these instructions is not followed exactly, a fire or explosion may re-sult causing property damage, personal injury, or loss of life.
• Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

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 service must be performed by a qualified installer, service agency, or gas supplier.

IMPORTANT SAFETY INFORMATION

THIS IS A HEATING APPLIANCE

• DO NOT OPERATE THIS APPLIANCE WITHOUT THE OUTER CASING INSTALLED.
• Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies.
• Children and adults should be alerted to the hazards of high surface temperatures and should stay away to avoid burns or clothing ignition.
• Young children should be carefully supervised when they are in the same room as the appliance.
• Clothing or other flammable material should not be placed on or near the appliance.
• Any safety screen or guard removed for servicing an appliance must be replaced before operating the appliance.
• Keep the burner and control compartment clean.
• Installation and repair should be done by a QUALIFIED SERVICE PERSON. The appliance should be inspected before use and at least annually by a qualified service person.
• More frequent cleaning may be required due to excessive lint from carpeting, bedding materials, etc. It is imperative that control compartments, burners, and circulating air passageways of the appliance be kept clean.
• Do not put anything around the furnace that will obstruct the flow of combustion and ventilation air.
• Do keep the appliance area clear and free from combustible material, gasoline and other flammable vapors and liquids.
• Do examine the venting system periodically and replace damaged parts.
• Do make a periodic visual check of the pilot and burners. Clean and replace damaged parts.
• Do not use this heater if any part has been underwater. Immediately call a qualified service technician to inspect the heater and to replace any part of the control system and any gas control that has been under water.
• This furnace must not be connected to a chimney flue serving a separate solid-fuel-burning appliance.

SAFETY INFORMATION FOR USERS OF LP-GAS

• Propane (LP-Gas) is a flammable gas that can cause fires and explosions. In its natural state, propane is odorless and colorless.
• You may not know all the following safety precautions that can protect both you and your family from an accident.
• Read them carefully now, then review them point by point with the members of your household. Someday when there may not be a minute to lose, everyone’s safety will depend on knowing exactly what to do.
• If, after reading the following information, you feel you still need more information, please contact your gas supplier.

LP-GAS WARNING ODOR

• If a gas leak happens, you should be able to smell the gas because of the odorant put in the LP-Gas. That’s your signal to go into immediate action!
• Do not operate electric switches, or 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.
• LP-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 firefighters declare them to be safe.
• Use your neighbor’s phone and call a trained LP-Gas service person and the fire 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 servicemen and firefighters check for escaped gas. Have them air out the area before you return. Properly trained LP-Gas service people should repair the leak, and then check and relight the gas appliance for you.

NO ODOR DETECTED – ODOR FADE

• Some people cannot smell well. Some people cannot smell the odor of the chemical put into the gas. You must find out if you 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 LP gas is colorless, and it can fade under some circumstances. For example, if there is an underground leak, the movement of the gas through the soil can filter the odorant.
• Odorants in LP-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.
• LP-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. Immediately go into action as instructed earlier.

SOME POINTS TO REMEMBER

• Learn to recognize the odor of LP gas. Your local LP-gas dealer can give you a “Scratch and Sniff” pamphlet. Use it to find out what the propane odor smells like. If you suspect that your LP-Gas has a weak or abnormal odor, call your LP-Gas Dealer.
• If you are not qualified, do not light pilot lights, perform service, or make adjustments to appliances on the LP-Gas system. If you are qualified, consciously think about the odor of LP-Gas before and while lighting pilot lights performing service, or making adjustments.
• Sometimes a basement or a closed-up house has a musty smell that can cover up the LP-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 LP-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 filled and allowed to set too long before refilling. Cylinders and tanks that 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. If you have any questions about the gas odor, call your LP gas dealer. A periodic sniff test of the LP gas is a good safety measure under any condition.
• If, at any time, you do not smell the LP-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 LP-Gas.
• If you experience a complete “gas out,” (the container is under 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 orifices.
• 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 empty or having it refilled before it is empty.

INTRODUCTION

• A 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 that apply to the installation of a vented wall furnace.

Instructions to Installer

1. Installer must leave instruction manual with owner after instal-lation.
2. The installer must have the owner fill out and mail the warranty card supplied with the furnace.
3. The installer should show the owner how to start and operate the furnace.

• Warning: Any change to this furnace or its control can be dangerous. This is a heating appliance and any panel, door, or guard removed for servicing an appliance must be replaced before operating the appliance.
• To conserve Gas: Turn off the pilot when the heater is not in use.

General Information

• This series is designed and certified 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 the initial firing of this furnace, its paint will bake out and smoke will occur. To prevent the triggering of smoke alarms, ventilate 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 floor.
• Such equipment shall be located, or protected, so it is not subject to physical damage by a moving vehicle.

Qualified Installing Agency

• Installation and replacement of gas piping, gas utilization equipment or accessories, and repair and servicing of equipment shall be performed only by a qualified agency.
• The term “qualified agency” means any individual, firm, corporation, or company that 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.
• State of Massachusetts: The installation must be made by a licensed plumber or gas fitter 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.

SPECIFICATIONS

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.

RECOMMENDED VENT CONFIGURATION

Note: No vent equipment is supplied with a furnace. 4″ Oval (all parts purchased locally)

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 first-floor ceiling, and one pair of fire 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 fire stop spacers.

Insulated Vent Enclosure

• Gravity-vented wall furnaces installed in buildings with flat 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 flue products an insulated vent enclosure is recommended.
• Use Type B vent pipe and maintain at least a one-inch (25mm) clearance to combustibles.
• Use a metal thimble to protect the vent pipe as it passes through combustibles.
• The Baseplate Gasket is factory installed on the header. Baseplate attaches to the header with screws. B-vent snaps into and is attached to the baseplate.
• The minimum height of the vent pipe must be six feet (1.8m) above the 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 flow of dust and lint particles into the main burner.
• Dust and lint accumulation inside the main burner will result in a yellow main burner flame and possible shooting inside the combustion chamber and vent pipe.
• To clean the main burner refer to Page 13, “Proper Main Burner Flame.

GAS SUPPLY

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
---|---|---
| Nat.| L.P.| Nat.| L.P.
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

• Note: Never use plastic pipe. Check to confirm whether your local codes allow copper tubing or galvanized.
• Note: Since some municipalities have additional local codes, it is always best to consult your local authority and installation code.

Installing a New Main Gas Cock

• Each appliance should have its manual gas cock.
• A manual main gas cock 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 liquefied 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.
• never use an exposed flame to check for leaks. The appliance must be disconnected from piping at inlet of the control valve and the pipe capped or plugged for a pressure test.
• Never pressure test with the appliance connected; the control valve will sustain damage!
• 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 to the gas line that is capped on the bottom in which condensation and foreign particles may collect.

The use of the following gas connectors is recommended:

• ANS Z21.24 Appliance Connectors of Corrugated Metal Tubing and Fittings
• ANS Z21.45 Assembled Flexible Appliance Connectors of Other Than All-Metal Construction
• The above connectors may be used if acceptable by the authority having jurisdiction. The state of Massachusetts requires that a flexible 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 appliance and its shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures above 1/2 psig (3.5 kPa).
3. The appliance must be isolated from the gas supply piping system by closing its 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 above 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 of 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.

CLEARANCES

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 the sides, 12″ (305mm) to the top, and 1 1/2″ (38mm) from the floor.
   • NOTE: A minimum distance of 1 1/2″ (38mm) must also be maintained from the top surface of carpeting, tile, etc.

VENTILATION AND COMBUSTION AIR

• 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, infiltration is normally adequate to provide air for combustion and draft hood dilution.
• Where appliances are installed in confined and unconfined 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 confined and unconfined 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.

LOCATION – ALL MODELS

• Select a location near the center of the space to be heated. Overflow heat will circulate through doorways into adjacent rooms.
• For large homes or spread-out floor plans, two or more furnaces are recommended.
• Do not locate a 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 the 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 the Rear Register Kit is to be used, see the Rear Register Kit instructions for the location of the hole in the rear wall. The register outlet must be cut in the wall before the furnace is installed.
• NOTE: If an Optional Blower is to be used, hard-wiring must be completed for the optional blower before installation of the header plate.

ROUGH-IN INSTRUCTIONS

• Provide an opening in the wall 14 1/2″ (368mm) wide and 66 1/8″ (168cm) high measured from the top of the floor plate (See Figure 2 and Figure 3). Wall depth is to be 2″ x 4″ frame 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 the baseplate.
• Attach enough vent pipe so that when installed in a wall opening the vent pipe will extend above the ceiling plate by at least 6″ (152mm). Install ceiling spacers according to the manufacturer’s instructions.
• Insert header plate with attached 4 ovals, double wall vent pipe into the wall opening. Position the header plate at the height shown in Figure 2.
• Locate the rear edge of the nailing flange at the back of the 2″ x 4″ stud which will center the vent collar in the wall. Locate the angled edge of the header plate flush with the top of the wall opening. Nail header plate to the wall studs.

FINISHING INSTRUCTIONS

Plastering (Figure 4)

• In new construction use only plain (not perforated) gypsum lath around the furnace and vent pipe so that plaster “Keys” will not project into wall space.
• Use wood strips nailed to the inside of the studs and the top of the bottom plate. These must be removed before the installation of the furnace. Lath and plaster against the top projection of the Header Plate.
• Do not allow wall finish materials to project into the furnace recess.

Installing Furnace (Figure 5)

• Clear the recess of all debris, and remove any wood plaster-grounds. Stand the furnace on the floor in front of the wall opening.
• Insert furnace flue into rectangular opening in header plate and raise furnace carefully (see Figure 5). Swing the bottom of the furnace into the wall opening with the back of the legs flush with the rear of the floor plate.
• Secure furnace support legs to the floor plate.
• IMPORTANT — Avoid securing too tightly and disturbing the inner casing. Do not try to force the furnace into a wall opening that is smaller than the specified dimension.

OUTER CASING (Figure 6)

1. Align 1 3/4″ slot on the casing bracket with the bottom screw hole on the inner casing. Attach the casing bracket to the inner casing with one (1) 10 x 1/2″ screw for each casing bracket. Do not completely tighten the screws at this time.
2. Place the outer casing onto the header.
   • Attention: Use a center clearance hole on the outer casing top for attachment to the header with one (1) 8 x 3/8″ Phillips screw when the optional blower is not installed.
   • Attention: Use outside clearance holes on the outer casing top for attachment to the header with two (2) 8 x 3/8″ Phillips screws when the optional blower is installed.
3. Align clearance holes on the 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 the 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 the hardware package to the pivot pins located at the bottom of the control door. Install control door to outer ceiling assembly.

ON/OFF DEVICE

• CAUTION — Do not run the wire behind the flanges of the 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 never be used on line or low voltage A.C. circuits.

Installing the ON/OFF Device

• 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 floor 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 flame. The flame must cover the top of the thermopile. Cleaning of the pilot orifice 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.
• To conserve Gas: Turn off the pilot when the heater is not in use.

LIGHTING INSTRUCTIONS

FOR YOUR SAFETY READ BEFORE LIGHTING

• WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage personal injury, or loss of life.
• 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 for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. 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.
• C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it; call a qualified service technician. Force or attempted repair may result in a fire or explosion.
• D. Do not use this appliance if any part has been underwater. 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 under water.

1. STOP! Read the safety information above.
2. Turn off all electric power to the appliance (if applicable).
3. Remove the control access panel (control door).
4. Push in the gas control knob slightly and turn clockwise
   • NOTE: The knob cannot be turned from “PILot” to “oFF” unless the knob is pushed in slightly. Do not force.
5. Wait ten (10) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP!
   • Follow “B” in the safety information above. If you don’t smell gas, go to the next step.
6. Find the pilot – follow the metal tube from the gas control. The pilot is mounted on the front of the main burner.
7. Turn the gas control knob counterclockwise to “PILOT.
8. Push in the control knob all the way and hold in. Immediately light the pilot witha match. Continue to hold the control knob in for about one (1) minute after the pilot is lit.
   • Release the knob and it will pop back up. The pilot should remain lit. If it goes out, repeat steps 5 through 9.
   • If the knob does not pop up when released, stop and immediately call a qualified service technician or gas supplier.
   • If the pilot will not stay lit after several tries, turn the gas control knob to “OFF” and call your service technician or gas supplier.
9. Turn the gas control knob counterclockwise to
10. Replace the control access panel (control door).
11. Turn on all electric power to the appliance (if applicable).

TO TURN OFF THE GAS TO THE APPLIANCE

1. Turn off all electric power (if applicable) to the appliance if service is to be performed.
2. Remove the control access panel (control door).
3. Push in the gas control knob slightly and turn clockwise to “OFF.” Do not force.
4. Replace the control access panel (control door).

VENT SAFETY SHUTOFF SYSTEM

• 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 to a properly installed and maintained venting system or tampering with the vent safety shutoff system can result in 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 flow to the main burner to “shut off” due to improper venting or a blocked flue.

To reset the manual reset vent safety switch:

1. Remove the outer casing.
2. Depress the manual reset button. The manual reset vent safety switch is located on the draft diverter.
3. Replace the outer casing.
   • If the manual reset vent safety switch continues to “shut off” the gas flow to the main burner a qualified 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.

PROPER MAIN BURNER FLAME

• The correct flame will be a short blue inner flame with a much larger light blue outer flame. The burner does not have a primary air adjustment.
• The flame will be proper if the factory-set pressure and orifice are used. After the furnace has begun operating, cleaning of the burner may be needed for proper flame, 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 the pilot burner from the 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.

PROPER PILOT FLAME

• The correct flame will be blue, extending past the thermopile. The flame 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 the flame.
• Replace the pilot cover screw to eliminate gas leaking at that control valve opening.
• LP gas (propane) will not require adjustment.
• After use, cleaning may be required for the proper flame.
• Examine the pilot flame before and during each heating season.

TROUBLESHOOTING

• GENERAL All furnaces have been fire-tested to check for proper operation. This includes the main burner flame, pilot flame, 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 the furnace.
• Servicing the Pilot and Main Burner, Pilot orifice, thermopile, and Main Burner orifice
• 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 first installed or was “OFF” all summer, the pilot flame may be too lean to ignite on the first few trials.
• Turn the gas control knob to the PILOT position and depress the gas control knob. Hold the gas control knob down to bleed the line;

1. Use a lighter rod to light the pilot with a match.

If Pilot Does Not Light By Any Means

1. Check the gas control knob for being in the “Pilot” position.
2. Check pilot adjustment for being fully open (counterclockwise to open).
3. If gas is available in the supply tubing, the pilot orifice and/or pilot burner are probably restricted by a spider web. Clean pilot assembly and relight.

If Pilot Does Not Remain “On” After Releasing Gas Control Knob

1. Follow instructions and hold the gas control knob down longer and harder.
2. Determine if the pilot flame extends past the thermopile; if not, adjust the pilot flame or clean the 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 the furnace is in operation. If millivolt output decreases during furnace operation gas control may be defective.

Main Gas Valve Does Not Open When The ON/OFF Device Is Turned “On

1. Check the millivolt output of the thermopile.
2. On/off device wires may be broken.
3. The on/off device may be defective.

MASTER PARTS DISTRIBUTOR LIST

• To Order Parts Under Warranty, please contact your local Empire dealer. See the dealer locator at www.empirecomfort.com.
• To provide warranty service, your dealer will need your name and address, purchase date and serial number, and the nature of the problem with the fireplace.
• To Order Parts After the Warranty Period, please contact your dealer or one of the Master Parts Distributors listed below. This list changes from time to time. For the current list, please click on the Master Parts button at www.empirecomfort.com.
• Please note: Master Parts Distributors are independent businesses that stock the most commonly ordered Original Equipment repair parts for Heaters, Grills, and Fireplaces manufactured by Empire Comfort Systems Inc.

Dey Distributing

• 1401 Willow Lake Boulevard Vadnais Heights, MN 55101
• Phone: 651-490-9191
• Toll-Free: 800-397-1339 Website: www.deydistributing.com Parts: Heater, Hearth, and Grills

Victor Division of F. W. Webb Company

• 200 Locust Street
• Hartford, CT 06114
• Phone: 860-722-2433
• Toll Free: 800-243-9360
• Fax: 860-293-0479
• Toll-Free Fax: 800-274-2004
• Websites: www.fwwebb.com & www.victormfg.com Parts: Heater, Hearth and Grills

East Coast Energy Products

• 10 East Route 36
• West Long Branch, NJ 07764
• Phone: 732-870-8809
• Toll Free: 800-755-8809
• Fax: 732-870-8811
• Website: www.eastcoastenergy.com Parts: Heater, Hearth and Grills

HOW TO ORDER REPAIR PARTS

Parts Not Under Warranty

• Parts can be ordered through your Service Person, Dealer, or Master Parts Distributor. See this page for the Master Parts Distributors list.
• For best results, the service person or dealer should order parts through the distributor. Parts can be shipped directly to the service person/dealer.

Warranty Parts

• Warranty parts will need proof of purchase and can be ordered by your Service Person or Dealer. Proof of purchase is required for warranty parts.
• All parts listed in the Parts List have a Part Number. When ordering parts, first obtain the Model Number and Serial Number from the name plate on your equipment.
• Then determine the Part Number (not the Index Number) and the Description of each part from the following illustration and part list. Be sure to give all this information.
• Fireplace Model Number—————————
• Fireplace Serial Number———————————–
• Type of Gas (Propane or Natural)
• Part Description————————–
• Part Number——————————
• Do not order bolts, screws, washers, or nuts. They are standard hardware items and can be purchased at any local hardware store.
• Shipments are contingent upon strikes, fires, and all causes beyond our control.

PARTS LIST

Attention: When ordering parts, the part number and description of the part must coincide.

USE ONLY THE MANUFACTURER’S REPLACEMENT PARTS. USE OF ANY OTHER PARTS COULD CAUSE INJURY OR DEATH.

PARTS VIEW

OPTIONAL BLOWER INSTALLATION INSTRUCTIONS

• Remove three three-prong cord sets from the blower housing.
• Remove (4) 8 x 3/8″ screws that attach the blower front to the blower housing.
• Position blower housing on top of header assembly.
• Route 120V field wiring into blower housing through cord set hole on the back of blower housing.
• Refer to the wiring diagram to make wiring connections inside the blower housing. Be sure to follow all local and National electrical codes when making field wiring connections.
• Align keyhole slots on the back of the blower housing with (2) screws attached to a wall. Position the blower housing flush with the wall surface and on top of the outer casing.
• Complete tightening blower housing screws from Step 7 to the wall.
• Attach caps and plugs from the blower housing and blower front.
• Attach the blower front to the blower housing with (4) 8 x 3/8″ screws from Step 9.
• Installation of optional blower assembly is completed.

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.

Wiring

• The appliance, when installed, must be electrically grounded under 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 appliance is equipped with a three-prong [grounding] plug for your protection against shock hazards and should be plugged directly into a properly grounded three-prong receptacle. Do not cut or remove the grounding prong from this plug.
• For an ungrounded receptacle, an adapter, which has two prongs and a wire for grounding, can be purchased, and plugged into the ungrounded receptacle, and its wire is 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.
• CAUTION: Label all wires before disconnection when servicing controls. Wiring errors can cause improper and dangerous operations. Verify proper operation after servicing.

Oiling

• The blower motor does not have oiling holes. Do not attempt to oil the blower motor.

GWTB2W WIRING DIAGRAM

OPTIONAL BLOWER INSTALLATION INSTRUCTIONS

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

Installing Blower Using Three-Prong Plug

1. Install furnace according to Installation Instructions and the Owner’s Manual.
2. Refer to the Drawing for measurements to locate (2) mounting holes on the wall surface above the furnace.
   • On Solid Wall
3. After locating mounting holes, attach (2) #10 x 1 1/2″ screws provided in the blower kit into the wall. Do not completely tighten screwheads to the wall, leave a 7/16″ gap between the screwheads and the wall.
   • On Sheet Rock Wall
4. After locating the mounting holes, drill (2) 5/16″ diameter holes into the wall. Insert the (2) plastic expansion anchors into the holes. Insert (2) #10 x 1 1/2″ screws provided in the blower kit into (2) plastic expansion anchors. Do not completely tighten the screwhead to the plastic expansion anchors, leave a 7/16″ gap between the screwheads and plastic expansion anchors. Refer to Figure 2.
5. At the top of the outer casing remove (1) screw from the center clearance hole that attaches the outer casing to the header assembly.
   • Also, remove (2) screws that attach the bottom of the outer casing to the inner casing.
6. Pull the outer casing forward approximately 1 inch away from the wall surface.
7. Remove (4) 8 x 3/8″ screws that attach the blower front to the blower housing.
   • Caution: When removing the blower front be careful not to damage motor coil wires. Damaged coil wires will disable the blower function.
   • Position blower housing on top of header assembly and route three-prong cord set between the left side of the outer casing and inner casing.
   • Caution: The blower cord set routine is important. The cord set
   • should be in a proper location to avoid being overheated.
   • Incorrect routing of the cord set may result in damage to the 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 the outer casing to the header assembly, (1) screw from Step 4 and (1) screw supplied in the hardware package. Refer to Figure 1.
10. Attach the outer casing to the inner casing with (2) screws from Step 4.
11. Align keyhole slots on the back of the blower housing with the (2) screws attached to wall. Position the blower housing flush with the wall surface and on top of the outer casing. Complete tightening blower housing screws from Step 3 to the wall.
12. Attach caps and plugs from the blower housing and blower front.
13. Attach the blower front to the blower housing with (4) 8 x 3/8″ screws from Step 6.
14. Installation of optional blower assembly is completed.

Caution: When installing blower housing onto the wall be careful motor coil is not damaged.
Installing Blower With Hard Wiring

1. When facing the wall opening, install a 120V electrical outlet junction box inside the wall opening on the left wall stud approximately 12 inches above the header plate.
2. Refer to the Drawing for measurements to locate the access hole for electrical wiring on the wall surface.
3. After locating the access hole, drill a 1/2″ hole into the wall.
4. Route enough field wiring from the 120V electrical outlet junction box through a 1/2″ access hole in the wall for connection to the blower housing.
5. Install furnace according to Installation Instructions and the Owner’s Manual.
6. Refer to the Drawing for measurements to locate (2) mounting holes on the wall surface above the furnace.
   • On Solid Wall
7. After locating mounting holes, attach (2) #10 x 1 1/2″ screws provided in the blower kit into a wall. Do not completely tighten the screwheads to a wall, leave a 7/16″ gap between the screwheads and the wall.
   • On Sheet Rock Wall
   • After locating mounting holes, drill (2) 5/16″ diameter holes into the wall. Insert (2) plastic expansion anchors into the holes. Insert (2) #10 x 1 1/2″ screws provided in the blower kit into (2) plastic expansion anchors.
   • Do not completely tighten the screwhead to the plastic expansion anchors, leave a 7/16″ gap between the screwheads and plastic expansion anchors. Refer to Figure 2.

APPLIANCE SERVICE HISTORY

WARRANTY

• Empire Comfort Systems Inc. warrants this space heating product to be free from defects at the time of purchase and for the periods specified below.
• Space heating products must be installed by a qualified technician and must be maintained and operated safely, according to the instructions in the owner’s manual.
• This warranty applies to the original purchaser only and is not transferable.
• All warranty repairs must be accomplished by a qualified gas appliance technician.

Limited Ten-Year Parts Warranty – Combustion Chamber

• Empire promises to the owner that if the combustion chamber (see parts list) fails because of defective workmanship or material within ten years from the date of purchase, Empire will repair or replace it at Empire’s option.

Limited Three-Year Parts Warranty – All Other Components

• (Except Remote Controls, Accessories and Replacement Parts)
• Should any part fail because of defective workmanship or material within three years from the date of purchase, Empire will repair or replace at Empire’s option.

Limited One-Year Parts Warranty – Remote Controls, Accessories, and Parts

• Should any remote control, accessory, or other part fail because of defective workmanship within one year from the date of purchase, Empire will repair or replace at Empire’s option.

Duties of the Owner

• The appliance must be installed by a qualified installer and operated by the instructions furnished with the appliance.
• A bill of sale, canceled check, or payment record should be kept to verify the purchase date and establish a warranty period. Ready access to the appliance for service.

What Is Not Covered

• Damages that might result from the use, misuse, or improper installation of this appliance.
• Travel, diagnostic costs, and freight charges on warranted parts to and from the factory.
• Claims that do not involve defective workmanship or materials.
• Unauthorized service or parts replacements.
• Removal and reinstallation cost.
• Inoperable due to improper or lack of maintenance.

How To Get Service

• To claim this warranty, please have your receipt available and contact your installing dealer. Provide the dealer with the model number, serial number, type of gas, and purchase verification.
• The installing dealer is responsible for providing service and will contact the factory to initiate any warranted parts replacements. Empire will make replacement parts available at the factory. Shipping expenses are not covered.
• If, after contacting your Empire dealer, the service received has not been satisfactory, contact: the Consumer Relations Department, Empire Comfort Systems Inc., PO Box 529, Belleville, Illinois 62222, or send an e-mail to info@empirecomfort.com with Consumer Relations” in the subject line.

Your Rights Under State Law

• This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state.
• Empire Comfort Systems Inc.
• Belleville, IL
• If you have a general question about our products, please e-mail us atinfo@empirecomfort.com.
• If you have a service or repair question, please contact your dealer.
• www.empirecomfort.com

Documents / Resources

| EMPIRE GWT-25W-2 Gravity VentED Single Wall Furnace [pdf] Installation Guide
GWT-25W-2 Gravity VentED Single Wall Furnace, GWT-25W-2, Gravity VentED Single Wall Furnace, Single Wall Furnace, Wall Furnace, Furnace
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References

• gas.la
• Home - Empire Comfort Systems
• Repair Your Grill: Shop Replacement Parts for 24,880 Models
• Empire Fireplace Parts - Select From 642 Models

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