Desa Tech RFN28TD manual

Save this manual for future reference. ® VENT -FREE NA TURAL GAS RADIANT FLAME ® HEA TER OWNER’S OPERA TION AND INST ALLA TION MANUAL 15,000 to 28,000 Btu/Hr with Thermostat Shown with Optional Mantel featuring Built-in Base WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damag[...]

2 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR 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 not touch any electrical switch; do not use any phone in your building. • immediately call your gas supplier from a nei[...]

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4 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR WARNING: Always have burner shield and screen in place before operating heater. This pre- vents excessive temperatures on heater surfaces. Failure to position the parts in accordance with these diagrams or failure to use only parts spe- cifically approved with this heater may result i[...]

5 104779 OWNER’S MANUAL ASSEMBL Y Continued Assembling and Attaching Brass Trim 1. Remove packaging from remaining three pieces of brass trim. 2. Locate four brass screws, two adjust- ing plates with set screws, and two shims in the hardware packet. 3. Align shim under adjusting plate as shown in Figure 6. 4. Slide one end of adjusting plate/shim[...]

6 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.[...]

7 104779 OWNER’S MANUAL Or Remove Door into Adjoining Room, Option 3 Ventilation Grills Into Adjoining Room, Option 2 12" 12" Ventilation Grills into Adjoining Room, Option 1 AIR FOR COMBUSTION AND VENTILA TION Continued Figure 8 - Ventilation Air from Inside Building VENTILATION AIR Ventilation Air From Inside Building This fresh air w[...]

8 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR 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 ve- hicle will not hit it. For convenience and efficiency, install heater • where there is easy access for operation, inspection, an[...]

9 104779 OWNER’S MANUAL INST ALLA TION Continued THERMOSTAT SENSING BULB The thermostat sensing bulb has been placed inside the heater for protection during shipping. Locating Thermostat Sensing Bulb 1. Remove front panel of heater (see Fig- ure 2, page 4). 2. Locate thermostat sensing bulb just under burner assembly . IMPORTANT: Attach thermosta[...]

10 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR Installing Bottom Mounting Screws 1. Locate two bottom mounting holes. These holes are near bottom on back panel of heater (see Figure 17). 2. Mark screw locations on wall. 3. Remove heater from mounting bracket. 4. If installing bottom mounting screws into hollow or solid wall, inst[...]

11 104779 OWNER’S MANUAL Securing Hearth Base to Floor 1. Position hearth base in desired location. Mark holes for drilling (see Figure 18). Remove hearth base. 2 . For carpeted floor, make a small cut with a sharp knife at marked loca- tions before drilling. If securing to a wood floor , drill a 3/4" deep hole using a 1/8" diameter dri[...]

12 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR Tee Joint Reducer Bushing to 1/8" NPT 1/8" NPT Plug Tap Test Gauge Connection * Tee Joint Pipe Nipple Cap Sediment Trap Pressure Regulator 3/8" NPT Pipe Nipple Ground Union Joint Heater Cabinet 3" Minimum Note: Burner bracket not shown for clarity Manual Shutoff V[...]

13 104779 OWNER’S MANUAL 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 piping system. Pressures in excess of 1/2 psig will damage heater regulator . 2. Cap of f open end of gas pipe where manual shutoff valve was connected. 3. Pressurize [...]

14 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1. T urn contr ol knob clockwise Clockwise to the OFF position. 2. T urn of f all electric power to the ap- pliance if service is to be perf ormed. Shutting Off Burner Only (pilot stays lit) Turn control knob clockwise Clockwise to the[...]

15 104779 OWNER’S MANUAL INCORRECT FLAME PATTERN AT HIGH POSITION CORRECT FLAME PATTERN AT HIGH POSITION Good Pilot-Nat. Port GRH/OV 007D INSPECTING BURNER Check pilot flame pattern and burner flame pattern often. PILOT FLAME PATTERN Figure 25 shows a correct pilot flame pat- tern. Figure 26 shows an incorrect pilot flame pattern. The incorrect p[...]

16 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR Note: All troubleshooting items are listed in order of operation. TROUBLESHOOTING OBSERVED PROBLEM When ignitor button is pressed, there is no spark at ODS/pilot When ignitor button is pressed, there is spark at ODS/pilot but no ignition ODS/pilot lights but flame goes out when contr[...]

17 104779 OWNER’S MANUAL OBSERVED PROBLEM Burner does not light after ODS/pilot is lit Delayed ignition of burner Burner backfiring during combustion Yellow flame during burner combustion Slight smoke or odor during initial operation Heater produces a whistling noise when burner is lit White powder residue forming within burner box or on adjacent[...]

18 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR TROUBLESHOOTING Continued OBSERVED PROBLEM Heater produces a clicking/ticking noise just after burner is lit or shut off Heater produces unwanted odors Heater shuts off in use (ODS operates) Gas odor even when control knob is in OFF position Gas odor during combustion Moisture/conden[...]

19 104779 OWNER’S MANUAL TECHNICAL SER VICE You may have further questions about in- stallation, operation, or troubleshooting. If so, contact DESA International’s Techni- cal Service Department at 1-800-323-5190. BTU (Variable) 15,000/28,000 Type Gas Natural Only Ignition Piezo Pressure Regulator Setting 3" W.C. Inlet Gas Pressure (in. of[...]

20 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR These Parts Centrals are privately-owned businesses. They have agreed to support our customer’s needs by providing original replacement parts and accessories. P AR TS CENTRALS Master Parts Distributors 1184 Wilson Ave. NW Grand Rapids, MI 49504 616-791-8270 1-800-446-1446 Washer Eq[...]

21 104779 OWNER’S MANUAL ACCESSORIES Purchase these heater accessories from your local dealer. If they can not supply these accessories, either contact your nearest Parts Central (see page 20) or call DESA International’s Sales Department at 1-800- 458-2472 for information. You can also write to the address listed on the back page of this manua[...]

22 104779 VENT -FREE NA TURAL GAS HEA TER 15,000 TO 28,000 BTU/HR 12-1 12-2 1 2 9 10 11 12 17 18 19 21 22 23 8 20 7 1 3 5 16 4 25 24 1 6 13 14 15 26 10 ILLUSTRA TED PA R T S BREAKDOWN RFN28TD[...]

23 104779 OWNER’S MANUAL P AR TS LIST RFN28TD This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. KEY PART NO. NUMBER DESCRIPTION QTY. 1 098304-01 Screw, #10 x 3/8" 6 2 100566-01CK Front Panel 1 3 100573-01BR Screen Assembly 1 4 10056[...]

104779-01 REV. A 5/98 Model Serial No. Date Purchased 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 GLO[...]