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VENT-FREE NATURAL GAS HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
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.
— 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 the gas supplier.
MODEL CGN10
Save this manual for future reference.
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Table of Contents
Related Manuals for Desa Comfort Glow CGN10
Summary of Contents for Desa Comfort Glow CGN10
- Page 1 • If you cannot reach your gas supplier, call the fire department. — Installation and service must be performed by a qualified installer, service agency, or the gas supplier. Save this manual for future reference. MODEL CGN10 ®...
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Page 2: Table Of Contents
CONTENTS SAFETY INFORMATION SECTION Safety Information ... 2 Product Identification ... 4 Local Codes ... 4 Unpacking ... 4 Product Features ... 4 Fresh Air For Combustion And Ventilation ... 5 Installing To Wall ... 9 Connecting To Gas Supply ... 13 Checking Gas Connections ... - Page 3 SAFETY INFORMATION Continued 099404 WARNINGS WARNING ICON G 001 WARNING: Any change to this heater or its controls can be dangerous. 1. Use only natural gas. Do not convert heater to use different fuel type. 2. If you smell gas •...
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Page 4: Product Identification
PRODUCT IDENTIFICATION LOCAL CODES UNPACKING PRODUCT FEATURES Ignitor Button Front Panel Figure 1 - Vent-Free Natural Gas Heater Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of The National Fuel Gas Code ANSI Z223.1, also known as NFPA 54*. -
Page 5: Fresh Air For Combustion And Ventilation
FRESH AIR COMBUSTION VENTILATION 099404 WARNING ICON G 001 This heater must have fresh air for proper operation. If not, poor fuel combustion could result. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home. - Page 6 FRESH AIR COMBUSTION VENTILATION Continued DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION Determining if You Have a Confined or Unconfined Space Use this worksheet to determine if you have a confined or unconfined space. Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.
- Page 7 FRESH AIR COMBUSTION VENTILATION Continued 099404 VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two permanent openings: one within 12" of the ceiling and one within 12"...
- Page 8 FRESH AIR COMBUSTION VENTILATION Continued VENTILATION AIR (Continued) Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts. You must provide two perma- nent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors.
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Page 9: Installing To Wall
INSTALLING TO WALL 099404 A qualified service person must install heater. Follow all local codes. CHECK GAS TYPE Use only natural gas. If your gas supply is not natural, do not install heater. Call dealer where you bought heater for proper type heater. INSTALLATION ITEMS Before installing heater, make sure you have the items listed below: •... - Page 10 INSTALLING TO WALL Continued For convenience and efficiency, install heater • where there is easy access for operation, inspection, and service • in coldest part of room CEILING 6" Minimum From Sides Of Heater Left Side FLOOR Figure 4 - Mounting Clearances As Viewed From Front of Heater INSTALLING HEATER TO WALL Marking Screw Locations 1.
- Page 11 INSTALLING TO WALL Continued 099404 Installing Two Mounting Screws Wall anchors and mounting screws are in hardware package. The hardware Note: package is provided with heater. Attaching to wall stud method For attaching mounting screw to wall stud 1. Drill hole at marked location using 9/64" drill bit. 2.
- Page 12 INSTALLING TO WALL Continued Placing Heater On Mounting Screws 1. Locate two keyhole slots on back panel of heater (see Figure 9). 2. Place large openings of slots over screwheads. Slide heater down until screws are in small portion of slots. Figure 9 - Location Of Keyhole Slots On Back Panel Of Heater Removing Front Panel Of Heater 1.
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Page 13: Connecting To Gas Supply
CONNECTING TO GAS SUPPLY 099404 A qualified service person must connect heater to gas supply. Follow all local codes. WARNING ICON G 001 Never connect heater to private (non-utility) gas wells. This gas is commonly known as well-head gas Check gas line pressure before connecting heater to gas line. Gas line IMPORTANT: pressure must be no greater than 14 inches of water. -
Page 14: Checking Gas Connections
CONNECTING TO GAS SUPPLY Continued CHECKING CONNECTIONS Hold pressure regulator with wrench when connecting it to gas piping IMPORTANT: and/or fittings. 3/8" NPT Pipe Nipple Ground Joint Union Manual Shutoff Valve * From Gas Meter (4" W.C. to 10.5" W.C. Pressure) 3"... - Page 15 CHECKING CONNECTIONS Continued 099404 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.
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Page 16: Operating Heater
OPERATING HEATER FOR YOUR SAFETY READ BEFORE LIGHTING WARNING ICON G 001 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. - Page 17 OPERATING HEATER Continued 099404 4. 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 12. If you don’t smell gas, go to the next step. 5.
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Page 18: Inspecting Burner
OPERATING HEATER Continued INSPECTING BURNER TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1. Turn control knob clockwise 2. Press in control knob and turn clockwise Shutting Off Burner Only (pilot stays lit) 1. Turn control knob clockwise MANUAL LIGHTING PROCEDURE 1. - Page 19 INSPECTING BURNER Continued 099404 BURNER FLAME PATTERN Figure 19 shows a correct burner flame pattern. Figure 20 shows an incorrect burner flame pattern. The incorrect burner flame pattern shows yellow tipping of the flame. It also shows the flame higher than 1/2 the glass panel height. WARNING ICON G 001 If yellow tipping occurs, your heater could produce increased...
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Page 20: Cleaning And Maintenance
CLEANING MAINTENANCE TROUBLE- SHOOTING Note: All troubleshooting items are listed in order of operation. WARNING ICON G 001 Turn off heater and let cool before cleaning. WARNING ICON G 001 You must keep control areas, burner, and circulating air passageways of heater clean. Inspect these areas of heater before each use. - Page 21 TROUBLE- SHOOTING Continued 099404 OBSERVED POSSIBLE PROBLEM CAUSE When ignitor button 1. Gas supply turned off is pressed, there is or manual shutoff spark at ODS/pilot valve closed but no ignition 2. Control knob not in PILOT position 3. Control knob not pressed in while in PILOT position 4.
- Page 22 TROUBLE- SHOOTING Continued POSSIBLE OBSERVED PROBLEM CAUSE 1. Burner orifice is Burner does not light after ODS/pilot is lit clogged 2. Burner orifice diameter is too small 3. Inlet gas pressure is too low 1. Manifold pressure is Delayed ignition of too low burner 2.
- Page 23 TROUBLE- SHOOTING Continued 099404 WARNING ICON G 001 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. •...
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Page 24: Technical Service
Parts Not Under Warranty Contact authorized dealers of this product. If they cannot supply original replace- ment part(s), either contact your nearest Parts Central (see page 21) or call DESA International’s Parts Department at 1-800-972-7879 for information. When calling DESA International, have ready: •... -
Page 25: Parts Centrals
Send a check for $5.00 payable to DESA International. Purchase this heater accessory from your local dealer. If they cannot supply this accessory, either contact your nearest Parts Central (see above) or call DESA International’s Parts Department at 1-800-972-7879 for information. You can also write to the address listed on the back page of this manual. -
Page 26: Illustrated Parts Breakdown
HEATER EXPLODED VIEW... -
Page 27: Parts List
PARTS LIST CGN10 099404 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 24 of this manual. PART NUMBER DESCRIPTION 098304-01 Screw, #10 x 3/8" 099467-02 Front Panel Assembly... -
Page 28: Warranty Information
COMFORT GLOW VENT-FREE RESIDENTIAL GAS HEATERS DESA International warrants this product to be free from defects in materials and components for one (1) year from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.