Instruction/ maintenance manual of the product CDR3924NT Desa
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Sav e this manual for future reference. For more information, visit www .desatech.com W ARNING: If the information in this manual is not fol- lowed exactly , a fire or explosion may result causing property damage, personal injury or loss of life.
www .desatech.com 1 13183-01B 2 W ARNING: Improper installation, adjustment, altera- tion, service, or maintenance can cause injury or prop- erty damage. Refer to this manual for correct installation and operational procedures. For assistance or addi- tional information consult a qualified installer , service agency , or the gas supplier .
www .desatech.com 3 1 13183-01B SAFETY INFORMA TION W ARNING: This product c o n t a i n s a n d / o r g e n e r a t e s chemicals known to the State of California to cause cancer or birth defects, or other reproduc- tive harm.
www .desatech.com 1 13183-01B 4 1. This appliance is only for use with the type of gas indica ted on the rating plate. This appl iance is not convertible for use with other gases. 2. Do not place propane/LP supply tank(s) in- side any structure. Locate propane/LP supply tank(s) outdoors.
www .desatech.com 5 1 13183-01B PRODUCT IDENTIFICA TION Log Set Base Assembly Ignitor Burner Control Knob Figure 1 - Product Identification Grate UNP ACKING CA UTI ON: Do no t remove the data plates from the base as- sembly . The data plates contain important warranty and safety information.
www .desatech.com 1 13183-01B 6 Unusually Tight Construction The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air .
www .desatech.com 7 1 13183-01B A. Rework work she et, addin g the spac e of an adj oin- in g roo m. If the ex tr a spa ce pro vi de s an unc onfin ed space, remove door to adjoining room or add vent ilat ion gril ls be twee n ro oms. See V entilation Air Fr om Inside Building.
www .desatech.com 1 13183-01B 8 INST ALLA TION NOTICE: This heater is intended for use as supplemental heat. Use this heater along with your primary heating system. Do not install this heater as your pri- mary heat source. If you have a central heati ng syst em, yo u may run system’s circulating blower while using heat er .
www .desatech.com 9 1 13183-01B INST ALLA TION AND CLEARANCES FOR VENT -FREE OPERA TION W AR NI NG: Ma in ta in th e m in i- mu m cl ear an ces . If p oss ib le, pr o- v i d e gr ea t e r cl ea ra nc es fr om fl oo r , ce ili ng , a nd ad jo in ing w all .
www .desatech.com 1 13183-01B 10 INST ALLA TION Continued Minimum Noncombustible Material 8" Min. 12" 15" 18" All minimum distances are in inches 20" 2 1 /2 " 6" 8&q.
www .desatech.com 1 1 1 13183-01B INST ALLA TION Continued INST ALLING HEA TER BASE ASSEMBL Y W ARNING: Y ou must secure this heater to fireplace floor . If not, heater will move when you adjust controls. Moving heater may cause a gas leak. W AR NIN G: If ins tal lin g in a sun ken firep lace , sp eci al c are is n eed ed.
www .desatech.com 1 13183-01B 12 INST ALLA TION Continued CONNECTING TO GAS SUPPL Y W ARNING: This appliance requires a 1/2" NPT (National Pipe Thread) inlet connection to the pressure regulator . W ARNING: A qualified ser- vic e perso n m ust co nne ct heat er to gas supply .
www .desatech.com 13 1 13183-01B INST ALLA TION Continued W e recommend that you install a sediment trap in supp ly line as shown in Figu re 13. Locate sed imen t trap where it is within reach for cleaning. Install in piping system between fuel supply and heater.
www .desatech.com 1 13183-01B 14 INST ALLA TION Continued T est Pressures Equal T o or Less Than 1/2 PSIG (3.5 kPa) 1. Cl os e equi pme nt s hu to f f va lve ( se e Fi gu re 1 4).
www .desatech.com 15 1 13183-01B ADDING LA V A ROCK Place lava rock around base of heater if desired. Be sure not to cover the control knobs or air inlet openings on the front of heater .
www .desatech.com 1 13183-01B 16 OPERA TING HEA TER FOR YOUR SAFETY READ BEFORE LIGHTING W ARNING: If you do not fol- low these instructions exactly , a fire or explosion may result causing property damage, per - sonal injury or loss of life. A. This appliance has a pilot which must be lighted by hand.
www .desatech.com 17 1 13183-01B OPERA TING HEA TER Continued Figure 21 - Control Knob(s) and Ignitor Button Locations Ignitor Button Control Knob Rear Burner Control Knob Figure 22 - Pilot (Propane/LP) Pilot Burner Thermocouple Figure 23 - Pilot (Natural) Ignitor Electrode Pilot Burner Thermocouple 5.
www .desatech.com 1 13183-01B 18 Pilot Burner Pilot Burner Pilot Burner Thermocouple INSPECTING B URNERS Check pilot flame pattern and burner flame pat- terns often. PILOT FLAME P A TTERN Figure 24 shows a correct pilot flame pattern. Figure 25 shows an incorrect pilot flame pattern.
www .desatech.com 19 1 13183-01B Access Hole for Cleaning Natural Pilot CLEANING AND MAINTENANCE W ARNING: T urn off heater and let cool before cleaning. CA UT IO N: Y o u m u st k ee p c o n - t r o l a r e a s , b ur ne rs , an d c ir cu la t i n g ai r pa ssa gew ays of he ate r cle a n.
www .desatech.com 1 13183-01B 20 TROUBLESHOO TING W ARNING: T urn off heater and let cool before servicing. Only a qualified service person should service and repair heater . CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit.
www .desatech.com 21 1 13183-01B TROUBLESHOO TING Continued POSSIBLE CAUSE 1. Co nt ro l kn ob no t fu ll y pres sed i n 2. Control knob not pressed in long enough 3. Safety interlock system has been triggered 4. Equipment shutoff valve not fully open 5 .
www .desatech.com 1 13183-01B 22 TROUBLESHOO TING Continued POSSIBLE CAUSE 1. Re sidu es from manufac turi ng processes and logs curing 1. Turning control knob to HI position when burners are cold 2. Air in gas line 3. Air passageways on heater blocked 4 .
www .desatech.com 23 1 13183-01B W ARNING: 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.
www .desatech.com 1 13183-01B 24 OPTIONAL POSITIONING OF THERMOST A T SENSING B ULB FOR MASONR Y AND F ACTOR Y - BUIL T MET AL FIREPLACE If your log set cycles to pilot, but the room tem- perature drops to a lower than ideal comfort level before the log set comes back on, you may want to reposition the thermostat sensing bulb.
www .desatech.com 25 1 13183-01B SPECIFICA TIONS CDR3 924P T CDR392 4NT Bt u (V ari abl e) 1 1,0 00 /39, 000 1 1, 00 0/3 9,0 00 T ype Gas P ropa ne/L P Natu ral Igni tio n Elec tro nic Elec tro nic Mani fol d Pr essu re 8.0" W .C. 3.6" W . C.
www .desatech.com 1 13183-01B 26 ILL USTRA TED P ARTS BREAKDOWN MODELS CDR3924PT AND CDR3924NT 4 7 6 27 27 8 26 10 23 19 20 29 28 32 31 33 30 14 15 9 13 5 25 21 1 16 17 2 12 24 3 1 1 22 18.
www .desatech.com 27 1 13183-01B P ARTS LIST This list contains replaceable parts used in your heater . When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual. KEY P ART NUMBER NO. CDR3924NT CDR3924PT DESCRIPTION QTY .
113183 01 2701 Industrial Drive P .O. Box 90004 Bowling Green, KY 42102-9004 www .desatech.com 1 13183-01 Rev . B 08/04 NOT A UPC WARRANTY INFORMA TION KEEP THIS WARRANTY Model Serial No. Date Purchased Always specify model and serial numbers when communicating with the factory .
An important point after buying a device Desa CDR3924NT (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Desa CDR3924NT yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Desa CDR3924NT - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Desa CDR3924NT you will learn all the available features of the product, as well as information on its operation. The information that you get Desa CDR3924NT will certainly help you make a decision on the purchase.
If you already are a holder of Desa CDR3924NT, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Desa CDR3924NT.
However, one of the most important roles played by the user manual is to help in solving problems with Desa CDR3924NT. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Desa CDR3924NT along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
