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Page 2 - CONTENTS; SECTION; SAFETY; WARNINGS; DANGER; Carbon monoxide poisoning may lead to death!; Early signs of carbon monoxide poisoning; Natural Gas; : Natural gas is odorless. An odor-making agent is added to natural

2 099569 CONTENTS SECTION PAGE SAFETY INFORMATION WARNING ICON G 001 WARNINGS IMPORTANT: Read this owner’s manual carefully and completely beforetrying to assemble, operate, or service this heater. Improper use of thisheater can cause serious injury or death from burns, fire, explosion,electrical sh...

Page 3 - Continued; Any change to this heater or its controls can be dangerous.

3 099569 SAFETY INFORMATION Continued WARNING ICON G 001 WARNINGS Continued 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 • shut off gas supply• do not try to light any appliance• do ...

Page 4 - dealer where you bought heater.; Safety Device

4 099569 PRODUCT IDENTIFICATION LOCAL CODES Install and use heater with care. Follow all local codes. In the absence of localcodes, use the latest edition of the National Fuel Gas Code ANSI Z223, alsoknown as NFPA 54*. *Available from: American National Standards Institute, Inc. 1430 Broadway New Yo...

Page 5 - WARNING; PRODUCING ADEQUATE VENTILATION; Unusually Tight Construction; and; Unconfined Space

5 099569 FRESH AIR FOR COMBUSTION AND VENTILATION WARNING ICON G 001 WARNING This heater must have fresh air for proper operation. If not, poorfuel combustion could result. Read the following instructions toinsure proper fresh air for this and other fuel-burning appliancesin your home. Today’s homes...

Page 6 - You must provide additional ventilation air in a confined space.; DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION; Determining if You Have a Confined or Unconfined Space

6 099569 FRESH AIR FOR COMBUSTION AND VENTILATION Continued WARNING ICON G 001 WARNING You must provide additional ventilation air in a confined space. 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 ...

Page 7 - Ventilation Air From Inside Building; Figure 2 - Ventilation Air from Inside Building

7 099569 FRESH AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space. When ventilating to anadjoining unconfined space, you must provide two permanent openings: one within 12" of theceiling a...

Page 8 - Ventilation Air From Outdoors; Figure 3 - Ventilation Air from Outdoors

8 099569 FRESH AIR FOR COMBUSTION AND 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...

Page 9 - NOTICE; CHECK GAS TYPE; This heater is designed to be mounted on a wall.; Never install the heater; CAUTION

9 099569 INSTALLING TO WALL NOTICE 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 gas, do not install heater. Calldealer where you bought heater for proper type heater. INSTALLATION ITEMS Before installin...

Page 10 - Figure 5 - Attaching Thermostat Sensing Bulb; For convenience and efficiency, install heater; THERMOSTAT SENSING BULB; Locating Thermostat Sensing Bulb; opening in bottom of heater.; Figure 4 - Mounting Clearances As Viewed From Front of Heater; INSTALLING; If you install the heater in a home garage

10 099569 Figure 5 - Attaching Thermostat Sensing Bulb Clamp ThermostatSensing Bulb For convenience and efficiency, install heater • where there is easy access for operation, inspection, and service• in coldest part of room An optional fan kit is available from your dealer. See Accessories, page 30....

Page 11 - INSTALLING HEATER TO WALL; Mounting Bracket; Methods For Attaching Mounting Bracket To Wall; Attaching to wall stud; This method provides the strongest hold. Insert mounting; Attaching to wall anchor; This method allows you to attach mounting bracket to; Figure 6 - Bracket Location; Removing Front Panel Of Heater; Figure 7 - Removing Front Panel Of Heater

11 099569 INSTALLING HEATER TO WALL Mounting Bracket The mounting bracket is located on back panel of heater. It has been taped there forshipping. Remove mounting bracket from back panel. Continued Methods For Attaching Mounting Bracket To Wall Only use last hole on each end of mounting bracket to a...

Page 12 - Marking Screw Locations; Figure 8 - Mounting Bracket Clearances; Attaching Mounting Bracket To Wall; Attaching to wall stud method; Figure 9 - Folding Anchor

12 099569 Marking Screw Locations 1. Tape mounting bracket to wall where heater will be located. Make sure mount- ing bracket is level. 28,000 BTU/Hr Model 18,000 BTU/Hr Models 2. Mark screw locations on wall (see Figure 8). Note: Only mark last hole on each end of mounting bracket. Insert mounting ...

Page 13 - “pop” open anchor wings.; Figure 10 - Popping Open Anchor Wings For Thin Walls; Placing Heater On Mounting Bracket; Figure 11 - Mounting Heater Onto Mounting Bracket; Installing Bottom Mounting Screws; Figure 12 - Installing Bottom Mounting Screws

13 099569 4. For thin walls (1/2" or less), insert red key into wall anchor. Push red key to “pop” open anchor wings. IMPORTANT: Do not hammer key! For thick walls (over 1/2" thick) or solid walls, do not pop open wings. Figure 10 - Popping Open Anchor Wings For Thin Walls 5. Place mounting ...

Page 14 - Typical Pipe Diameters

14 099569 CONNECTING TO GAS SUPPLY NOTICE A qualified service person must connect heater to gas supply.Follow all local codes. Typical Pipe Diameters 18,000 BTU/Hr Models 3/8" or greater 28,000 BTU/Hr Model 1/2" or greater Installation must include a manual shutoff valve, union, and plugged ...

Page 15 - Figure 13 - Gas Connection; PRESSURE TESTING GAS SUPPLY PIPING SYSTEM; Test Pressures In Excess Of 1/2 PSIG; opening main gas valve located on or near gas meter.

15 099569 IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings. PressureRegulator Tee Joint ReducerBushing to1/8" NPT 1/8" NPTPlug Tap Test Gauge Connection * Tee Joint Pipe Nipple Cap 1/2" NPTPipe Nipple Figure 13 - Gas Connection * An A.G.A. d...

Page 16 - water to gas joints. Bubbles forming show a leak.; Test Pressures Equal To or Less Than 1/2 PSIG; gas valve located on or near gas meter.; PRESSURE TESTING HEATER GAS CONNECTIONS; internal joints for leaks.; Figure 14 - Manual Shutoff Valve; Figure 15 - Checking Gas Joints; CHECKING

16 099569 ON POSITION OFF POSITION 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 14).2. Pressuri...

Page 17 - Thermostat Models; Figure 16 - Control Knob In The OFF Position; LIGHTING INSTRUCTIONS

17 099569 OPERATING HEATER Thermostat Models FOR YOUR SAFETY READ BEFORE LIGHTING A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floo...

Page 19 - TO TURN OFF GAS TO APPLIANCE; OPERATING; Shutting Off Heater; to the OFF position.; to the PILOT position.; THERMOSTAT CONTROL OPERATION

19 099569 TO TURN OFF GAS TO APPLIANCE OPERATING HEATER Thermostat Models Continued Shutting Off Heater 1. Turn control knob clockwise Clockwise to the OFF position. 2. Turn off all electric power to the appliance if service is to be performed. Shutting Off Burner Only (pilot stays lit) 1. Turn cont...

Page 20 - Model; Figure 18 - Control Knob In The OFF Position

20 099569 OPERATING HEATER Non-Thermostat Model FOR YOUR SAFETY READ BEFORE LIGHTING A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the f...

Page 22 - Shutting Off Burner Only (pilot stays lit); MANUAL LIGHTING PROCEDURE; INSPECTING; Check pilot flame pattern and burner flame pattern often.; PILOT FLAME PATTERN; Figure 20 - Correct Pilot Flame Pattern; Figure 21 - Incorrect Pilot Flame Pattern

22 099569 Shutting Off Heater 1. Turn control knob clockwise Clockwise to the PILOT position. 2. Press in control knob and turn clockwise Clockwise to the OFF position. 3. Turn off all electric power to the appliance if service is to be performed. Shutting Off Burner Only (pilot stays lit) 1. Turn c...

Page 23 - BURNER FLAME PATTERN; Figure 22 - Correct Burner Flame Pattern; CORRECT FLAME PATTERN

23 099569 1/2 GLASS HEIGHT INCORRECT FLAME PATTERN AT HIGH POSITION If pilot flame pattern is incorrect, as shown in Figure 21 • turn heater off (see To Turn Off Gas to Appliance, page 19 [thermostat models] or page 22 [non-thermostat model]) • see Troubleshooting, pages 24 through 27. BURNER FLAME ...

Page 24 - CABINET; Air Passageways; SHOOTING; Turn off heater and let cool before cleaning.; REMEDY

24 099569 CLEANING AND MAINTENANCE ODS/PILOT AND BURNER • Use a vacuum cleaner, pressurized air, or small, soft bristled brush to clean. 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 cabin...

Page 28 - SPECIFICATIONS; When gas pressure is too low

28 099569 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. 18,000 BTU/Hr 28,000 BTU/Hr Models Model B.T.U (Variable) 9,000/18,000 14,000/28,000 Type Gas Natural Only ...

Page 29 - age for parts replaced under warranty.; Parts Under Warranty; Parts Not Under Warranty; When calling DESA International, have ready; PARTS

29 099569 REPLACEMENT PARTS Note: Use only original replacement parts. This will protect your warranty cover- age for parts replaced under warranty. Parts Under Warranty Contact authorized dealers of this product. If they can’t supply original replacementpart(s), either contact your nearest Parts Ce...

Page 30 - ACCESSORIES

30 099569 ACCESSORIES Purchase these heater accessories from your local dealer. If they can not supplythese accessories, either contact your nearest Parts Central (see page 29) or callDESA International’s Parts Department at 1-800-972-7879 for information. Youcan also write to the address listed on ...

Page 31 - 2 ODS/Pilot Assembly

31 099569 ILLUSTRATED PARTS LIST Manual Control18,000 BTU/Hr Non-Thermostat Model(Parts list on page 33) 12 ODS/Pilot Assembly (Parts list on page 33) 26 24 34 19 29 33 20 12-1 12-2

Page 33 - PARTS LIST

33 099569 PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, followthe instructions listed under Replacement Parts on page 29 of this manual. PART NUMBER FOR KEY 18,000 BTU/Hr 18,000 BTU/Hr 28,000 BTU/Hr NO. Non-Thermostat Thermostat Thermostat DESCRIPTION QTY....

Page 34 - NOTES

Page 36 - LIMITED WARRANTY; WARRANTY INFORMATION; KEEP THIS WARRANTY; INTERNATIONAL

LIMITED WARRANTY BLUE-FLAME VENT-FREE NATURAL GAS HEATERS DESA International warrants this product to be free from defects in materials and components for one (1) year fromthe date of first purchase, provided that the product has been properly installed, operated and maintained inaccordance with all...