Desa CGR50BNA, CGR65BNA, CGR65NA, CGR50NA, CGR35NA User Manual

VENTED NATURAL

GAS HEATERS

OWNER’S OPERATION AND INSTALLATION MANUAL

Models: CGR65BNA, CGR65NA, CGR50BNA, CGR50NA, CGR35NA

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.

FOR YOUR SAFETY

— 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 per-

formed by a qualified installer, service agency, or the gas supplier.

WARNING: Improper installation,

adjustment, alteration, service, or maintenance can cause property damage, personal injury or loss of life. Refer to this manual for correct installation and operational procedures. For assistance or additional information consult a qualified installer, service agency, or the gas supplier.

Save this manual for future reference.

CONTENTS

SECTION PAGE

Safety Information.........................................................................3

Product Identification .................................................................... 5

Local Codes ................................................................................... 6

Unpacking .................................................................................... 6

Product Features ............................................................................ 6

Installing Heater ............................................................................6

Check Gas Type...................................................................... 6

Installation Items.....................................................................6

Locating Heater.......................................................................7

Venting Heater ........................................................................ 8

Connecting to Gas Supply ...................................................... 11

Checking Gas Connections..................................................... 13

Installing Radiants .................................................................. 14

Installing Glass Panel .............................................................15

Air For Combustion and Ventilation.............................................17

Determining Fresh-Air Flow for Heater Location

Example 1: Locating Heater in Unconfined (Open) Area 18

Draft Hood Spillage Test............................................ 18

Providing Permanent Fresh-Air Ventilation .............. 19

Example 2: Locating Heater in Confined (Closed) Area..20

Ventilating Confined Area ......................................... 20

Operating Heater ........................................................................... 21

For Your Safety Read Before Lighting .................................. 21

Lighting Instructions............................................................... 21

Manual Lighting Procedure .................................................... 23

Blower Operation (For Models with Blower) ........................ 23

To Turn Off Gas To Appliance .............................................. 23

Inspecting Pilot and Burner Flame................................................ 24

Pilot Flame Pattern..................................................................24

Burner Flame Pattern .............................................................. 24

Cleaning and Maintenance ............................................................ 26

Troubleshooting.............................................................................27

Service Procedures ........................................................................32

Removing Control Valve and Burner Tube............................32

Removing Burner.................................................................... 33

Changing Burner Orifice ........................................................ 34

Blower Wiring Diagram................................................................ 34

Technical Service .......................................................................... 35

Specifications ................................................................................ 35

Service Hints ................................................................................. 35

Ordering Replacement Parts..........................................................36

Parts Centrals................................................................................. 36

Accessories .................................................................................... 37

Illustrated Parts List ......................................................................38-41

Warranty Information.................................................................... Back Cover

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SAFETY

INFORMATION

W ARNINGS

IMPORTANT: Read this owner’s manual carefully and completely be-

fore trying to assemble, operate, or service this heater. Improper use of

this heater can cause serious injury or death from burns, fire, explosion,

electrical shock, and carbon monoxide poisoning.

DANGER

Carbon monoxide poisoning may lead to death!

Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning

resemble the flu, with headaches, dizziness, or nausea. If you have these signs, the

heater may not be operating or venting properly. Get fresh air at once! Have heater

or heater venting system serviced. Some people are more affected by carbon

monoxide than others. These include pregnant women, people with heart or lung

disease or anemia, those under the influence of alcohol, and those at high altitudes.

Natural Gas: Natural gas is odorless. An odor-making agent is added to natural gas.

The odor helps you detect a natural gas leak. However, the odor added to natural gas

can fade. Natural gas may be present even though no odor exists.

Make certain you read and understand all Warnings. Keep this manual for reference.

It is your guide to safe and proper operation of this heater.

1. A qualified service person must install heater and venting system.

2. Use only natural gas. Do not convert heater to use different fuel type.

3. If you smell gas

• Shut off gas supply.

• 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.

4. This heater must have fresh air for proper operation. If not, poor fuel combustion and improper venting of flue gases will result. Carbon monoxide poisoning from backed-up flue gases could occur. The State of California lists carbon monoxide as a reproductive toxin under Proposition 65. Read the instructions under

Combustion and Ventilation, pages 17 through 20 for complete information.

5. Never install the heater

• in a mobile home or a recreational vehicle.

• where curtains, furniture, clothing, or other flammable objects are less than 48 inches from the front, 53 inches from top, or 12 inches from right side and 6 inches from left side and back of heater.

• directly on carpeting, tile, or other combustible materials other than wood flooring. Place heater on metal or wood panel extending the full width and depth of heater.

• as a fireplace insert.

• in high traffic areas.

• in windy or drafty areas.

Air for

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Continued

SAFETY

INFORMATION

Continued

W ARNINGS

6. Provide the following minimum heater clearances from combustibles (as viewed from the front of heater):

Front: 48 inches Back: 6 inches Top: 53 inches Right Side: 12 inches Left Side: 6 inches

7. Do not run heater

• where flammable liquids or vapors are used or stored

• under dusty conditions

8. Never place clothing or any flammable objects on the heater or venting system.

9. Heater and venting system surfaces are very hot during operation. Keep children and adults away from hot surfaces to avoid burns or clothing ignition. Carefully supervise young children when they are in the same room as heater. Heater will remain hot for a time after shutdown. Let surface cool before touching.

10. Do not use heater as a cooking device.

11. Do not alter heater or its controls. Any change may create a safety hazard.

Continued

12. Turn off heater and unplug (if equipped with blower) and let cool before servicing. Unless you need gas supply for testing, shut off manual shutoff valve before servicing. Only a qualified service person should service and repair heater and venting system.

13. Replace any safety screen or guard removed for servicing before running heater.

14. Do not use heater if any part has been under water. Immediately call a qualified service person to inspect the heater and to replace any part of the control system and any gas control which has been under water.

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PRODUCT

IDENTIFICATION

Lower Front Access Panel

Control Knob

Blower Switch (on models equipped with blower)

Ignitor Button

Burner Radiants

Draft Hood Outlet for Venting System

Control Valve

Figure 1 - Vented Natural Gas Heater

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Blower (on models equipped with blower)

Figure 2 - Vented Natural Gas Heater, Rear View

LOCAL CODES

Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of the following:

• National Fuel Gas Code ANSI Z223.1, also known as NFPA 54 *

• National Electrical Code ANSI/NFPA 70 *

*Available from: American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

UNPACKING

PRODUCT

FEATURES

INSTALLING

HEATER

1. Remove heater from carton.

2. Remove all protective packaging applied to heater for shipment.

3. Check heater for any shipping damage. If heater is damaged, promptly inform

dealer where you bought heater.

Piezo Ignition System

This heater has a piezo ignitor. This system requires no matches, batteries, or other sources to light heater.

Thermostatic Heat Control

This heater has a thermostat sensing bulb and a control valve. This results in the greatest heating comfort. This can also result in lower gas bills.

W ARNING

A qualified service person must install heater and venting system. Have them inspect heater before use and at least annually. Follow all local codes.

NOTICE

This heater must be electrically grounded if equipped with blower. Follow all local codes. In the absence of local codes, follow the National Electric Code, ANSI/NFPA 70.

CHECK GAS TYPE

Use only natural gas. If your gas supply is not natural gas, do not install heater. Call dealer where you bought heater for proper type heater.

INSTALLATION ITEMS

Before installing heater, make sure you have all items below.

• piping (check local codes)

• sealant (resistant to propane gas)

• manual shutoff valve *

• ground joint union

• test gauge connection * (see

Figure 7, page 12)

* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories, page 37.

• sediment trap

• tee joint

• pipe wrench

• venting materials

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INSTALLING

LOCATING HEATER

HEATER

Continued

W ARNING

Maintain the minimum clearances shown in Figure 3, below. If you can, provide greater clearances.

W ARNING

Never install the heater

• in a mobile home or a recreational vehicle.

• where curtains, furniture, clothing, or other flam-

mable objects are less than 48 inches from the front, 53 inches from the top, 12 inches from the right side and 6 inches from the left side and back of heater.

• directly on carpeting, tile, or other combustible materials other than wood flooring. Place heater on metal or wood panel extending the full width and depth of heater.

• as a fireplace insert.

• in high traffic areas.

• in windy or drafty areas.

CAUTION

If you install the heater in a home garage

• heater pilot and burner must be at least 18 inches above floor

• locate heater where moving vehicle will not hit it.

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For convenience and efficiency, install heater

• where there is easy access for operation, inspection, and service.

• in coldest part of room.

• near an electrical outlet if heater has blower or if you are planning to add blower to heater. See Accessories, page 37 for blower.

CEILING

Minimum

Left Side

48" Minimum from

Front of Heater

Figure 3 - Heater Clearances

53"

Minimum

Right Side

6" Minimum

from Back

12"

Minimum

Continued

INSTALLING

HEATER

VENTING HEATER

Note:

Venting/chimney materials are not supplied with heater.

Continued

W ARNING

A qualified service person must install the venting system for this heater. If venting system is not properly installed and maintained, the vent safety shut-off system will prevent the heater from running. Follow all local codes.

W ARNING

This heater has a vent safety shut-off system. This system shuts off the heater gas supply if you do not vent heater properly or the venting system is blocked. Do not operate heater if not properly vented. Do not tamper with the vent safety shut-off system. Carbon monoxide poisoning and death may result.

W ARNING

When venting this heater, follow the safety information listed below.

• Never vent heater to another room or inside a building. Only vent heater to the outdoors.

• Do not vent heater exhaust to a chimney or flue serving another solid-fuel-burning or gas appliance.

• We recommend you use flues classified as prefabricated or masonry all-fuel chimney or type-B vent. See

Vent Types,

• If using old vent, check vent for soot, creosote, and loose particles. If vent is damaged, repair or replace it before using heater.

• Extend the vertical section of vent pipe at least three feet above roof penetration.

• Extend the vertical section of vent pipe at least two feet above the highest point of any roof within ten feet.

• The horizontal run of vent pipe should rise at least 1/4 inch for each foot of run.

• Support the vent pipe at least every five feet along its length. Do not use combustible materials to support vent pipe.

• Never extend vent pipe horizontally through outside wall and terminate. You must connect a vertical run of vent pipe to the horizontal run. The vertical run must be at least 25% longer than the horizontal run.

• Install vent or chimney cap that is approved for use with vented gas room heaters.

• Do not use vent pipe smaller in diameter than that of the heater draft hood outlet.

• Do not use dampers in the vent pipes.

• Vertical height of vent must be greater than five feet

above vent connection at draft hood.

page 10.

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INSTALLING

VENTING HEATER

(continued)

HEATER

Continued

W ARNING

Do not vent heater in any of the following ways (see Figure 4).

Heater must be vented to the outdoors. Never vent heater to another room or inside a building.

The vertical section of vent pipe must extend at least two feet above the highest point of any roof within ten feet.

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Never extend vent pipe horizontally through outside wall and terminate. You must connect a vertical run of vent pipe to the horizontal run. The vertical run must be at least 25% longer than the horizontal run.

Less than 5' between elbows

Vertical run of pipe must be at least five feet from elbow to elbow.

Figure 4 - Improper Venting Systems

Never extend vent pipe horizontally through a chimney or flue. You must connect a vertical run of vent pipe to the horizontal run. The vertical run must be at least 25% longer or five feet minimum than the horizontal run.

Continued

INSTALLING

HEATER

Continued

VENTING HEATER

(continued)

Proper Size Vent

To safely vent heater, the vent connector pipe must be the same diameter as the draft hood outlet on the rear of the heater. Pipe that is too small can cause flue gas to spill from the heater. Fasten vent connector to the draft hood outlet with a sheet metal screw.

Vent Types

Prefabricated or Masonry All-Fuel Chimney - This is a masonry chimney or a

residential-type prefabricated chimney. Only use prefabricated chimneys listed by Underwriters Laboratories (UL), Inc.

Type-B Vent - These vents are made of noncombustible, corrosion resistant

material. They are certified by a nationally recognized testing agency. Type-B vents are double-walled pipe. Clearances to combustible construction must be in accordance with the listing of the particular type-B vent. Type-B vents are currently listed as B-1, B-1 1/2, and B-2.

The illustrations below show both vent types. The illustration shows typical construction of each type of venting system. Minimum clearances and lengths are added to the illustrations.

Terminate at least 5' above draft hood. If vent extends over 5' above roof, support with guy wires or braces.

Min.

Heater

Vent Cap Must Be At Least 2 Feet Above Highest Point Within 10 Feet.

Maintain Listed Clearance of Vent

Support If Necessary

Lock Joints

Vent Connector

Seal Around Collar and Flashing

Position Firestop

Maintain Listed Clearance of Vent

Vertical Vent

Heater

Lock Joints

Support Laterals

53"

Min.

sonry All-Fuel Chimney

Figure 5 - Typical Construction of Venting Systems

Type-B VentPrefabricated or Ma-

Continued

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INSTALLING

CONNECTING TO GAS SUPPLY

HEATER

Continued

W ARNING

A qualified service person must connect heater to gas supply. Follow all local codes.

W ARNING

Never connect heater to private (non-utility) gas wells. This gas is commonly known as well-head gas.

IMPORTANT:

line. Gas line pressure must be no greater than 14 inches of water. If gas line pressure is higher, heater regulator damage could occur.

Check gas line pressure at gas meter before connecting heater to gas

Gas Meter

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Figure 6 - Connecting Heater to Utility Gas Line

CAUTION

Use only new, black iron or steel pipe. Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe that is 1/2" in diameter or greater to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur.

The gas supply line to your heater must be 1/2 inch in diameter or larger. If the supply line branches to serve two or more heaters, the line from the branch back to the gas meter must be doubled or tripled, etc., in size (depending upon the number of heaters). to serve two heaters, the line diameter from the branch back to the gas meter must be at least 1 inch. If three heaters are served, the line diameter from the branch back to the gas meter must be at least 1 1/2 inches.

Note:

Use pipe that is the next size larger than the heater control valve fitting.

Example for 1/2 inch diameter supply line:

If gas supply line total length exceeds forty feet, use a larger diameter pipe.

If the supply line branches

INSTALLING

HEATER

Installation must include a manual shutoff valve, ground joint union, plugged 1/8" NPT tap, and a sediment trap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figure 7).

Continued

Apply pipe joint sealant lightly to male threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves.

CAUTION

Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.

Install sediment trap in supply line as shown in Figure 7. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and contaminants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly.

IMPORTANT:

valve of heater. This will prevent turning or damaging control valve.

Control Valve

Use two pipe wrenches when connecting gas piping to gas control

Acceptable construction of inlet gas line

Ground Joint Union

Test Gauge Connection*

Reducer Bushing to 1/8" NPT

1/8" NPT Plug Tap

Tee Joint

Sediment Trap

Figure 7 - Gas Connection

Pipe Nipple

Cap

Manual Shutoff Valve *

From Gas Meter (5" W.C. Min** to 7" W.C. Max)

Preferred construction of inlet gas line

From Gas Meter (5" W.C. Min** to 7" W.C. Max)

** For purposes of input adjustment.

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INSTALLING

CHECKING GAS CONNECTIONS

HEATER

Continued

W ARNING

Test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once.

WARNING

Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

Pressure Testing Gas Supply Piping System

Test Pressures In Excess of 1/2 PSIG

1. Disconnect heater and its individual manual shutoff valve from gas supply pipe. Pressures in excess of 1/2 PSIG will damage heater regulator.

2. Cap off open end of gas pipe where manual shutoff valve was connected.

3. Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter.

4. Check all joints of gas supply piping system. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak.

5. Correct all leaks at once.

Test Pressures Equal To or Less Than 1/2 PSIG

1. Close manual shutoff valve (see Figure 8).

2. Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter.

3. Check all joints from propane supply tank to manual shutoff valve. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak.

4. Correct all leaks at once.

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Pressure Testing Heater Gas Connections

1. Open manual shutoff valve (see Figure 8).

2. Open main gas valve located on or near gas meter.

3. Make sure control knob of heater is in the OFF position.

4. Check all joints from manual shutoff valve to control valve on heater. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak.

5. Correct all leaks at once.

6. Light heater (see Operating Heater, pages 21 through 23). Check the rest of the internal joints for leaks.

7. Turn off heater (see To Turn Off Gas to Appliance,page 23).

On Position

Off Position

Figure 8 - Manual Shutoff Valve

Continued

INSTALLING

INSTALLING RADIANTS

HEATER

Continued

W ARNING

Carefully handle the glass panel. Glass edges are rounded and buffed to prevent cuts, however, chipped or broken sections of glass can present sharp edges. These sharp edges can cut skin.

1. Remove glass guard from across opening at front of heater (see Figure 8).

2. Place radiants into combustion chamber through opening at front of heater. Front of radiant sits on front radiant support (see Figure 9, page 14). Back of radiant rests on back radiant support (see Figures 8 and 9).

Note:

Radiants should never come in contact with burner flame. Contact with

flame may cause carbon or soot deposits on radiants.

Burner

Glass Guard

Lower Front Access Panel

Radiant

Front Radiant Support

Combustion Chamber

Back Radiant Support

Lower Front Access Area

Glass Retaining Channel

Figure 9 - Location of Radiants

Back Radiant Support

Burner

Figure 10 - Position of Radiant

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INSTALLING

HEATER

INSTALLING GLASS PANEL

1. Locate the glass panel package inside the back of the heater.

Continued

CAUTION

Before installing glass panels, inspect the edges. If you notice any chips or cracks, do not install. If the surface on either side is deeply scratched, do not install. If these conditions exist, call DESA International’s Technical Service Department at 1-800-323-5190 for replacement glass panels.

CAUTION

Do not operate heater without glass panels installed. Operating heater without glass panels will damage front of heater due to excess temperatures.

CAUTION

Glass panels may have sharp edges. Handle with care.

2. Remove lower front access panel of heater by removing two screws at upper corners of panel. The lower front access panel covers the lower front access area (see Figure 9, page 14).

3. Remove two screws on glass guard. Remove glass guard (see Figure 11).

4. Carefully insert one glass panel up through lower front access area (see Figure 11).

5. Carefully slip glass panel behind hearth assembly (see Figure 11).

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Screw

Glass Panel

Glass Guard

Lower Front Access Area

Figure 11 - Inserting Glass Panels

Hearth Assembly

Continued

INSTALLING

6. Insert top edge of glass panel into the upper glass retaining channel (see Figure 12).

HEATER

Continued

CAUTION

Make sure you insert top edge of glass panels into the upper glass retaining channel. Do not install glass panels with top edge of glass in front of the upper glass retaining channel. Glass panels will not automatically go into the channel. You must guide the glass panels into it. Incorrect installation will damage front of heater due to excess temperatures.

Upper Glass Retaining Channel

Lower Glass Retaining Channel

Glass Panel

Lower Front Access Area

Figure 12 - Inserting Top Edge of Glass Panel into

Upper Glass Retaining Channel

7. Lower glass into lower glass retaining channel. Slide glass panel all the way to the left side.

Note:

If you have chipped or cracked a glass panel during installation, do not use. Contact DESA International’s Technical Service Department at 1-800323-5190 for a replacement glass panel.

Glass Panel

Lower Glass Retaining Channel

Figure 13 - Inserting Glass into Lower Retaining Channel

8. Repeat steps 4 through 7 for all glass panels.

9. Reinstall glass guard. Reinstall lower front access panel of heater.

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AIR FOR

COMBUSTION

AND

VENTILATION

W ARNING

This heater must have fresh air for proper operation. If not, poor fuel combustion and improper venting of flue gases will result. Carbon monoxide poisoning from backed-up flue gases could occur. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.

Today’s homes are built more energy efficient than ever. New materials, increased insulation, and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, home owners want their homes as airtight as possible.

While it is good to make your home energy efficient, it is not good to make it too airtight. Your home needs to breath. If your home is too airtight, fresh air has little chance of entering in. This could be dangerous if you have fuel-burning appliances. These appliances need fresh, outside air for proper combustion and ventilation.

Exhaust fans, fireplaces, clothes dryers, and fuel-burning appliances draw air from the house to operate. This heater is a fuel-burning appliance. It uses air from inside the house for combustion. It also uses this air as a draft for venting. This draft air helps move combustion gases through the vent pipe to the outdoors. If your house is too airtight, there is not enough fresh air for these items to use. Fresh air may draw back into the house through venting flues and chimneys. This will keep fuelburning appliances from venting properly. This may cause them to release poisonous carbon monoxide gas into your home. It is very important to provide enough fresh air to run all fuel-burning appliances.

DANGER

Carbon monoxide poisoning may lead to death!

Carbon monoxide is a colorless, odorless gas. Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness, and/or nausea. If you have these signs, the heater may not be operating or venting properly. Get fresh air at once! Have heater or heater venting system serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, persons with heart and lung disease and anemia, those under the influence of alcohol, and those at high altitudes.

Continued

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AIR FOR

COMBUSTION

AND

VENTILATION

Continued

In the absence of local codes, use the following excerpts from the National Fuel Gas Code NFPA 54/ANSI Z223.1, Air for Combustion and Ventilation.

DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION Example 1: Locating Heater in Unconfined (Open) Area

NOTICE

An unconfined area has a minimum air volume of 50 cubic feet for each 1000 BTU/Hr input rating of all appliances in the area (cubic feet equals length x width x height of area). Include adjoining rooms only if there are no doors between the rooms or if you add ventilation grills between the rooms (see

Area,

page 20).

In an open area, the air that leaks around doors and windows may provide enough fresh air for combustion and ventilation.

Draft Hood Spillage Test

Follow the steps below to see if enough fresh air is available.

1. Close all windows and doors.

2. If you have a fireplace, start a fire. Build fire until flames are burning strongly.

3. Turn on all exhaust fans. These include exhaust fans for kitchen, bathroom, water heaters (gas or electric), etc.

4. Turn on all vented gas appliances. These include any room heaters, water heaters, clothes dryer, etc.

5. Wait ten minutes for drafts to regulate.

6. Check for draft-hood spillage at each vented gas appliance. Do this by holding a lit match two inches from the draft opening (see Figure 14). If match flame pulls toward the draft hood, there is no spillage. If match flame blows away from the draft hood, there is spillage. This is a hazardous condition. See Draft Hood Spillage, page 19.

Ventilating Confined

Vent Pipe

Draft Hood

Match

Typical

Water

Heater

Figure 14 - Checking for Draft Spillage

No Draft Hood Spillage: This shows there is enough fresh air in area for

Heater

Match

Draft Hood

Opening

appliances. Turn off all exhaust fans and appliances if desired.

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AIR FOR

COMBUSTION

Draft Hood Spillage: This is a hazardous situation. Draft hood spillage re-

leases poisonous carbon monoxide gas into your home.

AND

VENTILATION

Continued

DANGER

Carbon monoxide poisoning may lead to death!

If draft hood spillage occurs, check for blocked flue connectors, vent pipes, and chimneys. If you find blockage, remove. Test again for spillage. If spillage still occurs or there was no blockage, you need more fresh, outside air in the house. You must provide additional fresh-air ventilation. Follow the steps below at once.

A. Open a window near the appliance(s) at least two inches. Test again for

spillage. If spillage does not stop, open window more and retest. If spillage stops, keep window open while running appliance(s). Supply fresh, outside air by a permanent method as soon as possible. If spillage still occurs, leave window open and go to next step.

B. If you have a fireplace, open a window or door near it at least two inches.

Test again for spillage. If spillage does not stop, open window or door more and retest. If spillage stops, keep window or door open while using fireplace. Supply fresh, outside air by a permanent method as soon as possible. If spillage still occurs, leave window or door open and go to next step.

C. If you have kitchen and bathroom exhaust fans, turn them off. Test again for

spillage. If spillage stops, do not use exhaust fans. Turn off circuit breakers for fans if possible. Permanently supply fresh, outside air as soon as possible.

Providing Permanent Fresh-Air Ventilation

If draft hood spillage occurs, you must permanently supply fresh, outside air to the inside of your house. Provide extra fresh air by using ventilation grills or ducts. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. If you install this heater in an area with other gas appliances, you must total the BTU/Hr input rating of all appliances. Follow the National Fuel Gas Code NFPA 54/ANSI Z223.1. It lists fresh-air requirements for fuel-burning appliances.

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IMPORTANT

Do not provide openings for inlet or outlet air into attic if attic has a thermostat controlled power vent.

Chimney or Gas

Outlet Air

Inlet Air

Vent

Outlet Air

Inlet Air

Figure 15 - Ventilation Air from Outdoors

Ventilated Attic

To Attic

Crawl

Space

Ventilated

Crawl Space

Continued

AIR FOR

Example 2: Locating Heater in Confined (Closed) Area

COMBUSTION

AND

VENTILATION

Continued

NOTICE

A confined area has an air volume of less than 50 cubic feet for each 1000 BTU/Hr input rating of all appliances in the area (cubic feet equals length x width x height of area). Include adjoining rooms only if there are no doors between the rooms.

If you install this heater in a confined area, you must provide additional fresh air.

Ventilating Confined Area

This fresh air would come from an adjoining open area or outdoors.

W ARNING

The adjoining open area must have enough fresh, outside air ventilation to supply any appliance in that area plus the confined area. Follow instructions under

Example 1: Locating Heater in Unconfined (Open) Area,

page 18 to make sure fresh air ventilation is adequate.

When ventilating to an adjoining open area, you must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two areas. Follow the National Fuel Gas Code NFPA 54/ANSI Z223.1. It lists fresh-air requirements for fuel-burning appliances.

12"

Ventilation Grills

Connecting Two Rooms

Ventilation

Grills into

Closet for

Hot Water

Heater

Recommended

into Crawl Space in Furnace Area or in

Closet with Water Heater

Figure 16 - Ventilation Air from Inside Building

to Meet Unconfined Space

12"

Fresh Air Duct

After providing ventilation between rooms, check for draft hood spillage (see Draft Hood Spillage Test, page 18). If draft hood spillage still occurs, provide more

ventilation between rooms or provide permanent ventilation from outdoors. See Providing Permanent Fresh-Air Ventilation, page 19.

100792

OPERATING

HEATER

W ARNING

Heater and venting system surfaces are very hot during operation. Keep children and adults away from hot surfaces to avoid burns and clothing ignition. Carefully supervise young children when they are in the same room as heater. Heater will remain hot for a time after shut down. Let surface cool before touching.

NOTICE

If operating heater for the first time, a slight odor will occur. This odor will go away after a few hours of operation.

FOR YOUR SAFETY READ BEFORE LIGHTING

W ARNING

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 electric switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas 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 or gas supplier. Force or attempted repair may result in a fire or explosion.

D. Do not use this appliance if any part has been under water. Immediately call a

qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

100792

LIGHTING INSTRUCTIONS

1. STOP! Read the safety information above.

2. If heater is equipped with a blower, turn off all electric power to the heater.

3. Make sure manual shutoff valve is fully open.

4. Locate control knob on top of heater. Fully depress control knob in any position other than PILOT to shut off burner and pilot.

Control Knob

DEPRESS

FOR OFF

LOW

Figure 17 - Control Knob and Ignitor Button

PILOT

HIGH

Ignitor Button

Continued

C-clockwise

OPERATING

HEATER

Continued

5. Wait five (5) 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 at the top of page 21. If you don’t smell gas, go to the next step.

6. Turn control knob clockwise knob for five seconds.

Note:

You may be running this heater for the first time after hooking up to gas supply. If so, you may need to depress control knob in for 15 seconds. This allows air to bleed from the gas system.

7. With control knob depressed, push down and release ignitor button. This will light pilot. The pilot is attached to the front of burner. You can see pilot through front glass of heater (see Figure 18). If needed, keep pressing ignitor button until pilot lights.

Note:

If pilot does not stay lit, refer to Troubleshooting, pages 27 through 31. Also contact a qualified service person or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see Manual Lighting Procedure, page 23.

8. Keep control knob depressed for 30 seconds after lighting pilot. After 30 seconds, release control knob.

• If control knob does not pop up when released, contact a qualified service person or gas supplier for repairs.

• Shut off gas immediately.

Note:

If pilot goes out, repeat steps 4 through 8.

to the PILOT position. Fully depress control

Clockwise

9. If heater is equipped with a blower, turn on all electrical power to the heater.

10. Turn control knob counterclockwise

11. If equipped, turn blower control to the AUTO or ON position (if desired).

to desired setting.

CAUTION

Do not try to adjust heating levels by using the manual shutoff valve.

Figure 18 - Viewing Pilot

100792

OPERATING

MANUAL LIGHTING PROCEDURE

HEATER

Continued

1. Remove lower front access panel on heater.

2. Locate pilot. Pilot is attached to the front of burner.

3. Follow steps 1 through 6 under Lighting Instructions, pages 21 and 22.

4. With control knob depressed, strike match. Hold match to pilot until pilot lights.

5. Follow steps 8 through 11 under Lighting Instructions, page 22.

BLOWER OPERATION

(For Models with Blower)

W ARNING

This heater has a three-prong, grounded electrical plug. This plug helps protect you against electrical shock. Only connect plug to a properly grounded, three-prong receptacle. Do not cut or remove the grounding prong from this plug.

1. Plug power cord into a standard 115 volt, 60 hertz outlet.

2. Turn the blower control to either the AUTO or ON position. In the AUTO position, as the heater begins to heat, the blower will automatically come on. The blower will remain on until the burner shuts off and cools down. In the ON position, the blower will stay on constantly. Turn the blower control to the OFF position to stop the blower at any time.

TO TURN OFF GAS TO APPLIANCE

Shutting Off Heater

1. Fully depress control knob in any position other than PILOT to shut off burner and pilot.

2. If equipped, turn blower control to OFF position.

Shutting Off Burner Only (pilot stays lit)

1. Turn control knob to the PILOT position. At this setting, only the pilot remains lit.

100792

INSPECTING

PILOT AND

BURNER

FLAME

Check pilot flame pattern and burner flame pattern often.

PILOT FLAME PATTERN

Figure 19 shows a correct pilot flame pattern. Figure 20 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will prevent the thermocouple from getting hot, causing the heater to shut down.

Thermocouple

Figure 19 - Correct Pilot

Flame Pattern

If pilot flame pattern is incorrect, as shown in Figure 20

• turn heater off (see To Turn Off Gas to Appliance, page 23)

• contact a qualified service person

Figure 20 - Incorrect

Pilot Flame Pattern

Thermocouple

BURNER FLAME PATTERN

Note:

To view burner flame, look through front glass of heater.

Figure 21, Page 25, shows a correct burner flame pattern. Figure 22, page 25, shows two incorrect burner flame patterns. The two incorrect flame patterns show ragged yellow flames and flames lifting off of burner.

W ARNING

If ragged yellow flame occurs, your heater could produce increased levels of carbon monoxide. If burner flame is incorrect, follow instructions on page 25.

NOTICE

Do not mistake orange flames with yellow flame. Dirt or other fine dust particles enter the heater and burn causing brief patches of orange flame.

100792

INSPECTING

PILOT AND

BURNER

FLAME

Continued

Sharp Blue Flame

Figure 21 - Correct Burner Flame Pattern

Ragged Yellow Flame

Flame Lifting Off of Burner

Figure 22 - Incorrect Burner Flame Patterns

If burner flame pattern is incorrect, as shown in Figure 22

• turn heater off (see To Turn Off Gas to Appliance, page 21)

• see Troubleshooting, pages 27 through 31.

100792

CLEANING

W ARNING

AND

MAINTENANCE

Turn off heater and let cool before cleaning or servicing.

W ARNING

Keep heater clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

CAUTION

You must keep control areas, burner, and circulating air passageways of heater clean. Inspect these areas of heater before each use. Have heater and venting system inspected yearly by a qualified service person. Heater may need more frequent cleaning due to excessive lint from carpeting, bedding material, etc.

CABINET

Air Passageways

• Use a vacuum cleaner or pressurized air to clean.

Exterior

• Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to remove dust.

COMBUSTION CHAMBER AND BURNER

Clean the combustion chamber and burner if you have run the heater with a high yellow flame. Incomplete combustion from lack of air causes the yellow flame. This will deposit soot inside the combustion chamber and on the burner. To clean combustion chamber and burner, you must remove the burner from heater. See Service Procedures, page 33, to remove burner. After removing burner, blow inside of combustion chamber clean with compressed air. Clean burner with a soft-bristled brush. Blow soot from burner with compressed air.

PILOT

Use a vacuum cleaner, compressed air, or small, soft-bristled brush to clean.

BURNER ORIFICE

Use a vacuum cleaner, compressed air, or small, soft-bristled brush to clean. You can also use a tooth pick to clean orifice. Do not enlarge or damage orifice hole.

PILOT AND BURNER FLAME

Check the pilot and burner flame monthly. Make sure pilot and burner flame is burning correctly. See Inspecting Pilot and Burner Flame, page 24.

VENTING SYSTEM

Check the venting system at least once a year. Make sure joints are secure and vent pipe is in good condition. Do not obstruct combustion and ventilation air entering the rear of heater.

BLOWER MOTOR (For Models with Blower)

The motor on a new blower is properly lubricated at the factory. The first heating season, the motor will need no additional care. At the beginning of each season afterwards, place a few drops of SAE 20 motor oil in the lubrication holes of motor. Locate the lubrication holes at front and rear of motor on motor casing.

100792

TROUBLE-

W ARNING

SHOOTING

Note: All troubleshooting items are listed in order of operation.

Turn off and unplug heater and let cool before servicing. Unless you need gas supply for testing, shut off manual shutoff valve before servicing. Only a qualified service person should service and repair heater and venting system.

Never use a wire, needle, or similar object to clean pilot. This can damage pilot.

OBSERVED PROBLEM

When ignitor button is pressed, there is no spark at pilot.

CAUTION

POSSIBLE CAUSE

1. Incorrect spark gap.

2. Ignitor electrode positioned wrong.

3. Ignitor electrode broken.

4. Ignitor electrode not connected to ignitor cable.

5. Ignitor cable pinched or wet.

6. Piezo ignitor nut is loose.

7. Broken or frayed ignitor cable.

8. Loose ignitor cable.

9. Bad piezo ignitor.

REMEDY

1. Adjust spark gap to 1/16".

2. Replace ignitor.

3. Replace ignitor.

4. Reconnect ignitor cable.

5. Free ignitor cable if pinched by any metal or tubing. Keep ignitor cable dry.

6. Tighten nut holding piezo ignitor to heater cabinet. Nut is located inside heater cabinet at top.

7. Replace ignitor cable.

8. Reconnect ignitor cable.

9. Replace piezo ignitor.

100792

When ignitor button is pressed, there is spark at pilot but no ignition.

1. Gas supply turned off or manual shutoff valve closed.

2. Control knob not in PILOT position.

3. Control knob not pressed in while in PILOT position.

4. Air in gas lines when installed.

5. Pilot is clogged.

6. Gas regulator setting is not correct.

1. Turn on gas supply or open manual shutoff valve.

2. Turn control knob to PILOT position.

3. Press in control knob while in PILOT position.

4. Continue holding down control knob. Repeat igniting operation until air is removed.

5. Clean pilot (see Clean- ing and Maintenanc, page 26) or replace pilot assembly.

6. Replace control valve.

Continued

TROUBLE-

SHOOTING

Continued

OBSERVED PROBLEM

Pilot lights but flame goes out when control knob is released.

POSSIBLE CAUSE

1. Manual shutoff valve not fully open.

2. Control knob not fully pressed in.

3. Control knob not pressed in long enough.

4. Safety interlock system has been triggered.

5. Thermocouple connection loose at control valve.

6. Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot flame to go out. This problem could be caused by any or all of the following: A) Improperly adjusted pilot flame B) Low gas pressure C) Dirty or partially

clogged pilot

7. Thermocouple damaged.

8. Control valve damaged.

REMEDY

1. Fully open manual shut-off valve.

2. Press in control knob fully.

3. After pilot lights, keep control knob pressed in 30 seconds.

4. Wait one minute for safety interlock system to reset. Repeat ignition.

5. Hand tighten until snug, then tighten 1/4 turn more.

6. A) Contact qualified service person to properly adjust pilot flame. B) Contact local natural gas company. C) Clean pilot

Cleaning and Maintenance, page 26)

replace pilot assembly.

7. Replace thermocouple.

8. Replace control valve.

(see

Burner does not light after pilot is lit.

1. Safety interlock system has been inadvertently triggered.

2. Burner orifice is clogged.

3. Burner orifice diameter is too small.

4. Inlet gas pressure is too low.

1. Fully depress control knob in any position other than pilot. Wait one minute for safety interlock system to reset. Repeat ignition.

Clean burner (see

Cleaning and Maintenance, page 26) or

replace burner orifice (see Changing Burner Orifice, page 34.

3. Replace burner orifice (see Changing Burner Orifice, page 34).

4. Contact local natural gas company.

100792

TROUBLE-

SHOOTING

Continued

OBSERVED PROBLEM

Delayed ignition of burner.

POSSIBLE CAUSE

1. Manifold pressure is too low.

2. Burner orifice is clogged.

REMEDY

1. Contact local natural gas company.

2. Clean burner

Cleaning and Maintenance, page 26)

replace burner orifice (see Changing Burner Orifice, page 34).

(see

Burner backfiring during combustion.

Yellow flame during burner combustion.

Flame lifting during combustion.

1. Burner orifice is clogged or damaged.

2. Burner damaged.

3. Gas regulator defective.

4. Delayed ignition.

1. Not enough air.

2. Gas regulator defective.

1. Burner orifice clogged or damaged.

2. Manifold pressure too high/defective gas regulator.

1. Clean burner (see

Cleaning and Maintenance, page 26) or

replace burner orifice (see Changing Burner Orifice, page 34).

2. Replace burner.

3. Replace control valve.

4. See above.

1. Check burner for dirt and debris. If found, clean burner (see

Cleaning and Maintenance, page 26).

2. Replace control valve.

1. Clean burner (see

Cleaning and Maintenance, page 26) or

replace burner orifice (see Changing Burner Orifice, page 34).

2. Replace control valve (see Removing Control

Valve and Burner Tube,

page 32).

100792

Slight smoke or odor during initial operation.

1. Residues from manufacturing processes.

1. Problem will stop after a few hours of operation.

Continued

TROUBLE-

SHOOTING

Continued

OBSERVED PROBLEM

Burner fails to respond to thermostat.

POSSIBLE CAUSE

1. Pilot flame not lit.

2. Pilot flame not properly heating end of thermocouple.

3. Pilot burner orifice clogged or damaged.

4. Control valve defective.

5. Temperature at thermostat bulb satisfied.

REMEDY

1. Light pilot burner (see Lighting Instructions, page 32).

2. Pilot flame needs adjusting. Contact a qualified service person.

3. Clean pilot burner (see

Cleaning and Maintenance, page 26).

4. Replace control valve.

Heater produces a whistling noise when burner is lit.

Heater produces a clicking/ticking noise just after burner is lit or shut off.

1. Air in gas line.

2. Air passageways on heater blocked.

3. Dirty or partially clogged burner orifice.

1. Metal expanding while heating or contracting while cooling.

1. Operate burner until air is removed from line. Have gas line checked by local natural gas company.

2. Observe minimum installation clearances (see Figure 3, page 7).

3. Clean burner (see

Cleaning and Maintenance, page 26) or

replace burner orifice.

1. This is common with most heaters. If noise is excessive, contact qualified service person.

100792

TROUBLE-

SHOOTING

Continued

If you smell gas

• Shut off gas supply.

• 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.

W ARNING

OBSERVED PROBLEM

Heater produces unwanted odors.

Heater shuts off in use.

POSSIBLE CAUSE

1. Heater burning vapors from paint, hair spray, glues, etc.

2. Gas leak. See Warn-

ing statement at top of page.

1. Heater not venting correctly. Vent safety switch shuts off heater.

2. Low line pressure.

3. Pilot partially clogged.

REMEDY

1. Ventilate room. Stop using odor causing products while heater is running.

2. Find and correct all leaks (see Checking Gas

Connections

1. Check venting system. If damaged or blocked, repair. If venting system is OK, have qualified service person replace vent safety switch, wire harness, or thermocouple interrupter.

2. Contact local natural gas company.

3. Clean pilot (see Clean- ing and Maintenance, page 26).

, page 13).

100792

Gas odor even when control knob is in OFF position.

Gas odor during combustion.

1. Gas leak. See Warn-

ing statement at top of page.

2. Control valve damaged.

1. Foreign matter between control valve and burner.

2. Gas leak. See Warn-

ing statement at top of page.

3. Foreign fumes in area of heater being drawn through burner combustion.

1. Find and correct all leaks (see Checking Gas

Connections

2. Replace control valve.

1. Take apart gas tubing and remove foreign matter.

2. Find and correct all leaks (see Checking Gas

Connections

3. Ventilate area around heater to remove any foreign fumes.

, page 13).

SERVICE

W ARNING

PROCEDURES

Removing Control Valve and Burner Tube

1. Shut off gas supply to heater.

2. Remove lower front access panel on heater.

3. Disconnect burner tube from orifice holder (see Figure 23).

4. Remove pilot gas line from control valve (see Figure 23).

5. Disconnect wire connectors from thermocouple interrupter (see Figure

23).

6. Remove thermocouple and thermocouple interrupter from control valve.

7. Remove cotter pin from control valve. This releases the control rod from valve (see Figure

23).

8. Remove the two mounting screws from control valve mounting bracket (see Figure 23).

9. Remove assembly from the rear of heater.

10.To reinstall, reverse above steps. Turn on gas to heater and check for gas leaks. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

11.Replace lower front access panel.

Control Rod

Control Valve Bracket

Orifice Holder

Figure 23 - Removing Control Valve and Burner Tube

Control Valve

Thermocouple Interrupter

Thermocouple

Burner Tube

Wire Connector

Pilot Gas Line

Wire Connector

Cotter Pin

Mounting Screw

100792

SERVICE

PROCEDURES

Continued

Removing Burner

1. Shut off gas supply to heater.

2. Remove lower front access panel on heater.

3. Disconnect burner tube from orifice holder (see Figure 24).

4. Remove orifice holder from burner (see Figure

24).

5. Remove pilot burner bracket nuts and remove pilot assembly (see Figure

24).

6. Move burner to the right for clearance. Rotate burner 90° and remove burner through lower front access opening.

7. To reinstall, reverse above steps. Turn on gas to heater and check for gas leaks. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

8. Replace lower front access panel.

Burner

Burner Tube

Pilot Burner Bracket Nut

Figure 24 - Removing Burner Tube, Orifice Holder, and Pilot Burner Assembly

Pilot Burner Assembly

Orifice Holder

(35,000 BTU/Hr Burner Shown)

Continued

100792

SERVICE

PROCEDURES

Continued

Changing Burner Orifice

1. Shut off gas supply to heater.

2. Remove lower front access panel on heater.

3. Disconnect burner tube from orifice holder (see Figure 25).

4. Remove orifice holder from burner (see Figure

25).

5. Use socket or open-end wrench to remove the old orifice from the orifice holder.

6. Clean and replace orifice, or replace with new orifice.

7. Turn on gas to heater and check for gas leaks. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

8. Replace lower front access panel.

Burner

Orifice

Burner Tube

Orifice Holder

Figure 25 - Orifice Location (35,000 BTU/Hr Burner Shown)

Figure 26 - Orifice

BLOWER

WIRING

DIAGRAM

(For Models With

Blower Assembly)

110/115 V.A.C.

Fan Switch

(Off/On/Auto)

Off

Black Blue

Black

White

Green

Auto

Red

Fan Switch (N.O.)

Black

Blower

Motor

Red

White

100792

TECHNICAL

SERVICE

You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323-

5190.

SPECIFICATIONS

35,000 BTU/Hr 50,000 BTU/Hr 65,000 BTU/Hr Model Model Model

BTU 35,000 50,000 65,000 Type Gas Natural Only Natural Only Natural Only Ignition Piezo Piezo Piezo Pressure Regulator Setting 3.5" W.C. 3.5" W.C. 3.5" W.C. Inlet Gas Pressure

Maximum 7" W.C. 7" W.C. 7" W.C. Minimum 5" W.C. 5" W.C. 5" W.C.

Dimensions, Inches

Heater (H x W x D) 25 x 27 Shipping Weight (pounds) 97 133**/120 158**/145 Flue Vent Size 4" dia. 4" dia. 5" dia. Orifice Size 34 drill, ø .111 29 drill, ø .136 3.8 mm, ø .1496

** When equipped with blower

Note:

These heaters are certified for elevations of 0-4500 feet above sea level. For

elevations above 2000 feet, de-rate heater 4% for each 1000 feet above sea level.

/4 x 16 28 x 32 1/2 x 16 31 x 37 3/4 x 16

SERVICE

HINTS

When gas pressure is too low

• pilot will not stay lit

• burner will have delayed ignition

• heater will not produce specified heat

When gas quality is bad

• pilot will not stay lit

• burner will produce yellow flames and soot

• heater will backfire when lit

You may feel your gas pressure is too low or gas quality is bad. If so, contact your local natural gas supplier.

100792

ORDERING

REPLACEMENT

PARTS

Note:

Use only original replacement parts. This will protect your warranty cover-

age for parts replaced under warranty.

Parts Under Warranty

Contact your nearest dealer or call DESA International’s Technical Service Department at 1-800-323-5190.

When calling DESA International, have ready

• your name

• your address

• model number of your heater

• how heater was malfunctioning

• type of gas used (propane or natural gas)

• purchase date

Usually, we will ask you to return the defective part to the factory.

Parts Not Under Warranty

Contact your nearest dealer. If they can’t supply original replacement part(s), either contact your nearest Parts Central (below) or call DESA International’s Parts Department at 1-800-972-7879 for information.

When calling DESA International, have ready

• model number of your heater

• the replacement part number

PARTS

CENTRALS

These Parts Centrals are privately owned businesses. They have agreed to support our customer’s needs by providing original replacement parts and accessories. For certain parts, some Parts Centrals may refer you to a dealer in your area. When calling a Parts Central, ask for the Parts Department.

Howard Industries

1514 South Maple Ave. Los Angeles, CA 90015 213-747-5121

Victor Manufacturing

42 Rumsey Road E. Hartford, CT 06108 NY, NJ, DE, PA, MD 203-289-4223

Controlled Engineering

299 Roosevelt Road Glen Ellyn, IL 60137 708-469-7300

Portable Heater Parts

342 N. Country Rd. 400E Valparaiso, IN 46383 All States 219-462-7441 1-800-362-6951

FBD

601 Hope Street Bowling Green, KY 42101 502-796-8406 1-800-654-8534

American Air Dist.

537 W. 62nd Street Shreveport, LA 71108 318-861-0634

Master Service Center

1184 Wilson Grand Rapids, MI 49504 616-791-4760 1-800-446-1446

Washer Equipment Co.

1715 Main Street Kansas City, MO 64108 KS, MO, AR 816-842-3911

Controls, Inc.

6820 Glenwood Ave. Raleigh, NC 27612 NC, SC, VA, MD 919-787-2242 1-800-334-5886

Taratin Tank Co.

P.O. Box 6129 Freehold, NJ 07728 908-780-9340

East Coast Energy

833 Broadway W. Long Branch, NJ 07764 908-870-8809 1-800-755-8809

ATP Services

990 Avenue of Americas New York, NY 10018 212-967-6255

Dayton Hardware

P. O. Box 275 North Dayton Station Dayton, OH 45404 All States 513-258-3721 OH only 1-800-762-3426

Central Air Supply

424 North Rockwell Oklahoma City, OK 73127 405-495-0014

Warmer Image

208 Carter Drive, Unit 21 West Chester, PA 19382 215-696-2670 1-800-368-0803

LaPorte’s Parts & Service

2444 North 5th Street Hartsville, SC 29550 803-879-3009 Parts Department

Cans Unlimited, Inc.

P. O. Box 645 Taylor, SC 29687 All States 803-879-3009 1-800-845-5301

Dealers LP Equip. Co.

P.O. Box 341145 Bartlett, TN 38184 AL, TN 901-386-8780

Capitol Hydronic Supply

104 West Jefferson Street Falls Church, VA 22046 703-532-1622

Tuco Industrial Products

P.O. Box 5076 Lynwood, WA 98046 206-743-9533 1-800-735-1268

Auer Steel Supply

2935 W. Silver Spring Dr. Milwaukee, WI 53209 414-463-1234

100792

ACCESSORIES

Purchase these heater accessories from your local dealer. If they can not supply these accessories, contact your nearest Parts Central (see page 36). You can also write to the address listed on the back page of this manual for information.

BLOWER KIT - PART NUMBER GA6010

For all models. Provides better heat distribution. Makes heater more efficient. Complete installation and operating instructions provided with blower.

100792

MANUAL SHUTOFF VALVE - GA5010

For all models. Manual shutoff valve with 1/8" NPT tap.

ILLUSTRATED

P ARTS LIST

Blower

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Ordering Replacement Parts on page 36 of this manual.

Assembly

PART NUMBER FOR KEY NO. CGR65BNA CGR65NA CGR50BNA CGR50NA CGR35NA DESCRIPTION QTY.

1 099998-01 —— 099998-01 —— —— Fan Switch 1 2 100045-01 —— 100045-01 —— —— Wire Harness 1 3 100042-01 —— 100042-01 —— —— Fan Limit Switch 1 4 M11084-38 —— M11084-38 —— —— Screw, #8-18 x 3/8" 2 5 100121-01 —— 100121-01 —— —— Blower 1 6 M11084-26 —— M11084-26 —— —— Screw, #10-16 x 3/8" 6 7 531001 —— 531001 —— —— Blower Pan 1 8 098304-01 —— 098304-01 —— —— Screw, #10-24 x 3/8" 1 9 099123-01 —— 099123-01 —— —— Thermobulb Clip 1

100792

ILLUSTRATED

P ARTS LIST

Cabinet

Assembly

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Ordering Replacement Parts on page 36 of this manual.

KEY NO. CGR65BNA CGR65NA CGR50BNA CGR50NA CGR35NA DESCRIPTION QTY.

1 100202-03 100202-03 100202-02 100202-02 100202-01 Lower Front Panel 1 2 098304-01 098304-01 098304-01 098304-01 098304-01 Screw, #10-16 x 3/8" 2 3 100053-03BS 100053-03BS 100053-02BS 100053-02BS 100053-01BS Hearth Assembly 1

4 100204-03 100204-03 100204-02 100204-02 100204-01 Top Panel 1 5 098304-02 098304-02 098304-02 098304-02 098304-02 Screw, #6-20 x 3/8" 2 6 M11084-26 M11084-26 M11084-26 M11084-26 —— Screw, #10-16 x 3/8" 17

—— —— —— —— M11084-26 Screw, #10-16 x 3/8" 19 7 100205-03BS 100205-03BS 100205-02BS 100205-02BS 100205-01BS Glass Guard 1 8 100203-03 100203-03 100203-02 100203-02 100203-01 Cabinet Assembly 1 9 099123-01 099123-01 099123-01 099123-01 099123-01 Thermobulb Clip 2 10 100101-03BS 100101-03BS 100101-02BS 100101-02BS 100101-01BS Cabinet Back 1 11 —— 099997-01 —— 099997-01 099997-01 Switch Plug 1

099988-02 099988-02 099988-02 099988-02 099988-02 Lighting Instructions

099987-02 099987-02 099987-02 099987-02 099987-02 Control Position Decal 1

100154-02 100154-02 100154-02 100154-02 100154-02 Warning Decal 1

PART NUMBER FOR

(includes items 5 & 7)

PARTS AVAILABLE - NOT SHOWN

Decal 1

100792

ILLUSTRATED

P ARTS LIST

Burner

Assembly

50 and 65

Models

35 Model

Only

100792

P ARTS LIST

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Ordering Replacement Parts on page 36 of this manual.

Burner

Assembly

PART NUMBER FOR KEY NO. CGR65BNA CGR65NA CGR50BNA CGR50NA CGR35NA DESCRIPTION QTY.

1 100729-03 100729-03 100729-02 100729-02 100729-01 Combustion Chamber 1 2 098324-02 098324-02 098324-02 098324-02 098324-02 Control Knob 1 3 097159-02 097159-02 097159-02 097159-02 097159-02 Piezo Ignitor 1 4 098271-05 098271-05 098271-05 098271-05 098271-05 Ignitor Cable 1 5 099974-03 099974-03 099974-02 099974-02 099974-01 Control Rod 1 6 063017 063017 100481-01 100481-01 063015 Limit Switch Bracket 1 7 M11084-26 M11084-26 —— —— M11084-26 Screw, #10-16 x 3/8" 6

—— —— M11084-26 M11084-26 —— Screw, #10-16 x 3/8" 5 8 099986-02 099986-02 099986-01 099986-01 099986-01 Wire Assembly 1 9 100000-01 100000-01 100000-01 100000-01 100000-01 Cotter Pin 1 10 231939 231939 231939 231939 231940 Limit Switch 1 11 M11084-38 M11084-38 M11084-38 M11084-38 —— Screw, #8-18 x 3/8" 3

—— —— —— —— M11084-38 Screw, #8-18 x 3/8" 2 12 099211-01 099211-01 099211-01 099211-01 099211-01 Screw, #10-16 x 2 1/4" 2 13 100207-01 100207-01 100207-01 100207-01 100207-01 Control Valve 1 14 098265-01 098265-01 098265-01 098265-01 098265-01 Elbow 1 15 098936-02 098936-02 098936-02 098936-02 098936-02 16 100028-02 100028-02 100028-02 100028-02 100028-02 Pilot Tubing 1 17 100307-01 100307-01 100307-01 100307-01 100307-01 Thermocouple 1 18 171176 171176 171176 171176 171176 Burner Tube 1 19 530988 530988 530988 530988 530988 Control Bracket 1 20 100309-01 100309-01 100309-01 100309-01 100309-01 Orifice Holder 1 21 180257 180257 180245 180245 180233 Orifice 1 22 100706-01 100706-01 100385-01 100385-01 100384-01 Burner Assembly 1 23 100310-01 100310-01 100310-01 100310-01 100310-01 Pilot Mounting Bracket 2 24 100308-01 100308-01 100308-01 100308-01 100308-01 Pilot (Includes 30 & 31) 1 25 M12461-25 M12461-25 M12461-25 M12461-25 M12461-25 Screw, 10-32 x 1/4" 2 26 098249-01 098249-01 098249-01 098249-01 098249-01 Nut, M5 x 0.8 2 27 101342-03 101342-03 101342-02 101342-02 101342-01 Glass Panel Package

28 100772-01 100772-01 —— —— —— Radiant 5

—— —— 100772-01 100772-01 —— Radiant 4

—— —— —— —— 100772-01 Radiant 3 29 530192 530192 530192 530192 530192 Glass Spring 2 30 100468-01 100468-01 100468-01 100468-01 100468-01 Pilot Electrode 1 31 100465-01 100465-01 100465-01 100465-01 100465-01 Electrode Nut 1

Thermocouple Interrupter

(Includes Retainer) 1

100792

NOTES

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100792

NOTES

100792

WARRANTY INFORMATION

Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written

warranty. We make no other warranty, expressed or implied.

LIMITED WARRANTY

COMFORT GLOW VENTED NATURAL GAS HEATERS

LIMITED ONE YEAR WARRANTY

This DESA product is warranted to the original purchaser to be free from defect in material and workmanship under normal use and maintenance for a period of one year from the date of installation whether or not actual use begins on that date. It is the responsibility of the consumer/owner to establish the warranty period. You are required to furnish proof of installation date, which may be a Bill of Sales or other payment record which verifies the original installation. A new or remanufactured part to replace any defective part will be provided, at DESA’s sole option, without charge for the part itself, FOB the shipping point. The exchanged part will be warranted for only the unexpired portion of the original warranty. Defective parts must be returned to DESA, transportation charges prepaid, (DESA is not responsible for any freight charges), where DESA will establish to its sole satisfaction that the part was or became defective under normal use and maintenance. No reimbursement will be made for transportation, diagnostics, shipping, handling, or other incidental expenses. This warranty applies only to the product in its original installation location and is voided if the product is reinstalled elsewhere.

LIMITED FOUR YEAR WARRANTY ON COMBUSTION CHAMBER

During the second through fifth years after the date of original installation, DESA further warrants the combustion chamber against defects in material and workmanship under normal use and maintenance. A replacement combustion chamber will be provided under the same conditions as stated in the one year warranty.

LIMITATION OF WARRANTIES

All implied warranties (including implied warranties of merchantability) are hereby limited in duration to the period for which each limited warranty is given. Some states do not allow limitations on how long an implied warranty lasts so the above limitations may not apply to you. The expressed warranties made in this warranty are exclusive and may not be altered, enlarged, or changed by any distributor, dealer, or other person whomsoever.

DESA WILL NOT BE RESPONSIBLE FOR:

1. Normal maintenance as outlined in the owner’s operation and installation manual including cleaning of component parts; such as, orifices and burners.

2. Failure to start and/or operate due to voltage or gas condition, blown fuses, open circuit breakers, loose or disconnected wires, low gas pressure, or other damages due to inadequacy or interruption of electrical service or gas supply.

3. Damage or repairs required as a consequence of faulty or incorrect installation not in conformance with DESA instructions.

4. Damage as a result of floods, winds, lightning, accidents, corrosive atmosphere, or other conditions beyond the control of DESA.

5. Parts or accessories not supplied by DESA.

6. Costs incurred in gaining access to the heater.

7. Damage or repairs needed as a consequence of any misapplication, abuse, unreasonable use, unauthorized alteration, improper servicing, improper operation, or failure to provide reasonable and necessary maintenance.

8. Freight charges incurred from parts replacement.

9. DESA product installed outside the Continental U.S.A. and Alaska.

10. DESA products whose serial number has been altered, defaced, or removed.

11. Fuel or electricity costs or increases in such costs from any reason whatsoever.

12. Any special, indirect or consequential property, economic, or commercial damage of any nature whatsoever. Some states do not allow the exclusion of incidental or consequential damages, so the above limitation may not apply to you.

No representative, dealer, or other person is authorized to assume for DESA International any additional, different, or other liability in connection with the sale of this DESA product.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. For more information about this warranty, write:

2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004

100792-01 REV. C 11/94

Desa CGR50BNA, CGR65BNA, CGR65NA, CGR50NA, CGR35NA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual