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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, per-
sonal 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.
VENTED NATURAL
GAS HEATERS
Save this manual for future reference.
WARNING
: Improper installation,
adjustment, alteration, service, or
maintenance can cause property
damage, personal injury or loss of
life. Refer to this manual for cor-
rect installation and operational
procedures. For assistance or
additional information consult a
qualified installer, service agency,
or the gas supplier.
®
®
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Table of Contents
Related Manuals for Desa Comfort Glow CGR35NA
Summary of Contents for Desa Comfort Glow CGR35NA
- Page 1 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, per- sonal injury, or loss of life.
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Page 2: Table Of Contents
CONTENTS SECTION 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 ... -
Page 3: Safety Information
SAFETY INFORMATION 100792 WARNINGS WARNING ICON G 001 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. - Page 4 SAFETY INFORMATION Continued WARNINGS WARNING ICON G 001 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.
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Page 5: Product Identification
PRODUCT IDENTIFICATION 100792 Lower Front Access Panel Figure 1 - Vented Natural Gas Heater Draft Hood Outlet for Venting System Control Valve Blower (on models equipped with blower) Figure 2 - Vented Natural Gas Heater, Rear View Blower Switch Control (on models Knob equipped with... -
Page 6: Local Codes
LOCAL CODES UNPACKING PRODUCT FEATURES INSTALLING HEATER 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 * •... -
Page 7: Locating Heater
INSTALLING HEATER Continued 100792 LOCATING HEATER WARNING ICON G 001 Maintain the minimum clearances shown in Figure 3, below. If you can, provide greater clearances. WARNING ICON Never install the heater • in a mobile home or a recreational vehicle. •... -
Page 8: Venting Heater
INSTALLING HEATER Continued VENTING HEATER Note: Venting/chimney materials are not supplied with heater. 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 pre- vent the heater from running. -
Page 9: Installing Heater
INSTALLING HEATER Continued 100792 VENTING HEATER (continued) WARNING ICON Do not vent heater in any of the following ways (see Figure 4). Heater must be vented to the out- doors. Never vent heater to another room or inside a building. Never extend vent pipe horizontally through outside wall and terminate. - Page 10 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.
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Page 11: Connecting To Gas Supply
INSTALLING HEATER Continued 100792 CONNECTING TO GAS SUPPLY A qualified service person must connect heater to gas supply. Follow all local codes. Never connect heater to private (non-utility) gas wells. This gas is commonly known as well-head gas. IMPORTANT: Check gas line pressure at gas meter before connecting heater to gas line. - Page 12 INSTALLING HEATER Continued 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). Apply pipe joint sealant lightly to male threads.
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Page 13: Checking Gas Connections
INSTALLING HEATER Continued 100792 CHECKING GAS CONNECTIONS WARNING ICON G 001 Test all gas piping and connections for leaks after install- ing or servicing. Correct all leaks at once. WARNING ICON Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. -
Page 14: Installing Radiants
INSTALLING HEATER Continued INSTALLING RADIANTS WARNING ICON 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. -
Page 15: Installing Glass Panel
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 Ser- vice Department at 1-800-323-5190 for replacement glass panels. - Page 16 7. Lower glass into lower glass retaining channel. Slide glass panel all the way to the left side. If you have chipped or cracked a glass panel during installation, do not Note: use. Contact DESA International’s Technical Service Department at 1-800- 323-5190 for a replacement glass panel. Glass Panel...
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Page 17: Air For Combustion And Ventilation
AIR FOR COMBUSTION VENTILATION 100792 WARNING ICON 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. -
Page 18: Determining Fresh-Air Flow For Heater Location
AIR FOR COMBUSTION 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 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... -
Page 19: Providing Permanent Fresh-Air Ventilation
AIR FOR COMBUSTION VENTILATION Continued 100792 This is a hazardous situation. Draft hood spillage re- Draft Hood Spillage: leases poisonous carbon monoxide gas into your home. WARNING ICON Carbon monoxide poisoning may lead to death! If draft hood spillage occurs, check for blocked flue connectors, vent pipes, and chimneys. -
Page 20: Example 2: Locating Heater In Confined (Closed) Area
AIR FOR COMBUSTION VENTILATION Continued Example 2: Locating Heater in Confined (Closed) Area 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). -
Page 21: Operating Heater
OPERATING HEATER 100792 WARNING ICON Heater and venting system surfaces are very hot during operation. Keep children and adults away from hot sur- faces to avoid burns and clothing ignition. Carefully super- vise young children when they are in the same room as heater. - Page 22 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.
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Page 23: Manual Lighting Procedure
OPERATING HEATER Continued 100792 MANUAL LIGHTING PROCEDURE 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. -
Page 24: Inspecting Pilot And Burner Flame
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. - Page 25 INSPECTING PILOT AND BURNER FLAME Continued 100792 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 •...
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Page 26: Cleaning And Maintenance
CLEANING MAINTENANCE WARNING ICON Turn off heater and let cool before cleaning or servicing. WARNING ICON G 001 Keep heater clear and free from combustible materials, gasoline, and other flammable vapors and liquids. WARNING ICON You must keep control areas, burner, and circulating air passageways of heater clean. -
Page 27: Troubleshooting
TROUBLE- SHOOTING Note: All troubleshooting items are listed in order of operation. 100792 WARNING ICON G 001 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. - Page 28 TROUBLE- SHOOTING Continued OBSERVED POSSIBLE PROBLEM CAUSE Pilot lights but flame 1. Manual shutoff valve goes out when not fully open. control knob is 2. Control knob not fully released. pressed in. 3. Control knob not pressed in long enough. 4.
- Page 29 TROUBLE- SHOOTING Continued 100792 OBSERVED POSSIBLE PROBLEM CAUSE Delayed ignition of 1. Manifold pressure is burner. too low. 2. Burner orifice is clogged. Burner backfiring 1. Burner orifice is during combustion. clogged or damaged. 2. Burner damaged. 3. Gas regulator defective. 4.
- Page 30 TROUBLE- SHOOTING Continued OBSERVED POSSIBLE PROBLEM CAUSE Burner fails to 1. Pilot flame not lit. respond to thermo- stat. 2. Pilot flame not prop- erly heating end of thermocouple. 3. Pilot burner orifice clogged or damaged. 4. Control valve defec- tive.
- Page 31 TROUBLE- SHOOTING Continued 100792 WARNING ICON 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.
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Page 32: Service Procedures
SERVICE 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). -
Page 33: Removing Burner
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). -
Page 34: Changing Burner Orifice
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. -
Page 35: Technical Service
TECHNICAL SERVICE SPECIFICATIONS SERVICE HINTS 100792 You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323- 5190. 35,000 BTU/Hr 50,000 BTU/Hr Model 35,000 Type Gas Natural Only Ignition Piezo Pressure Regulator Setting 3.5" W.C. -
Page 36: Ordering Replacement Parts
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 •... -
Page 37: Accessories
ACCESSORIES 100792 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. -
Page 38: Illustrated Parts List
—— 100042-01 —— M11084-38 —— 100121-01 —— M11084-26 —— 531001 —— 098304-01 —— 099123-01 —— CGR35NA DESCRIPTION —— Fan Switch —— Wire Harness —— Fan Limit Switch —— Screw, #8-18 x 3/8" —— Blower —— Screw, #10-16 x 3/8" ——... -
Page 39: Parts List
099123-01 100101-02BS 100101-02BS —— 099997-01 PARTS AVAILABLE - NOT SHOWN 099988-02 099988-02 099987-02 099987-02 100154-02 100154-02 CGR35NA DESCRIPTION 100202-01 Lower Front Panel 098304-01 Screw, #10-16 x 3/8" 100053-01BS Hearth Assembly (includes items 5 & 7) 100204-01 Top Panel 098304-02 Screw, #6-20 x 3/8"... - Page 40 ILLUSTRATED PARTS LIST Burner Assembly 50 and 65 Models 35 Model Only 100792...
- Page 41 098249-01 101342-02 101342-02 —— —— 100772-01 100772-01 —— —— 530192 530192 100468-01 100468-01 100465-01 100465-01 CGR35NA DESCRIPTION 100729-01 Combustion Chamber 098324-02 Control Knob 097159-02 Piezo Ignitor 098271-05 Ignitor Cable 099974-01 Control Rod 063015 Limit Switch Bracket M11084-26 Screw, #10-16 x 3/8"...
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Page 44: Warranty Information
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.