Instruction/ maintenance manual of the product CBT20NT 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 107882-01K 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 107882-01K 3 SAFETY INFORMA TION IMPORT ANT : Read this owner ’ s man ual caref ully and co mple tel y before trying to assemble, op- erate, 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.
www .desatech.com 107882-01K 4 4. This heater shall not be installed in a bedroom or bathroom. 5. This heater needs fresh, outside air ventilation to run properly . This heater has an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS shuts down the heater if not enough fresh air is available.
www .desatech.com 107882-01K 5 AIR FOR COMB USTION AND VENTILA TION W ARNING: This heater shall not be installed in a confined space or unusually tight con - struction unless provisions are provided for adequate combus- tion and ventilation air .
www .desatech.com 107882-01K 6 4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used. _______________ Btu/ Hr ( maxi mum the spac e can support) _______________ Btu.
www .desatech.com 107882-01K 7 VENTILA TION AIR V entilation Air From Inside Building This fresh air would come from an adjoining un- confined space. When ventilating to an adjoining unconfined spac.
www .desatech.com 107882-01K 8 INST ALLA TION ITEMS Before installing heater , make sure you have the items listed below . • for propan e/LP gas, exter nal regula tor (suppl ied by installer) • pi.
www .desatech.com 107882-01K 9 INST ALLA TION Continued THERMOST A T SENSING BULB The thermostat sensing bulb is below the heater . 1. Place clamp on thermostat sensing bulb as shown in Figure 5. Clamp is provided in hardware package. 2. Sn ap cla mp into up per moun ti ng hol e as sho wn in Figu re 5.
www .desatech.com 107882-01K 10 2. Mark screw locations on wall (see Figure 8). Note: Only mark last hole on each end of mou nti ng br acke t. In ser t m ount ing sc rew s through these holes only . 3. Re mo ve ta pe an d m ou nt in g b ra ck et fr om INST ALLA TION Continued Figure 8 - Mounting Bracket Clearances 18 3 / 4 " Min.
www .desatech.com 107882-01K 1 1 Installing Bottom Mounting Screws 1. Locate two bottom mounting holes. These holes are near bottom on back panel of heater (see Figure 12). 2. Mark screw locations on wall. 3. Remove heater from mounting bracket. 4. If installing bottom mounting screws into hollow or solid wall, install wall anchors.
www .desatech.com 107882-01K 12 INST ALLA TION Continued Figure 14 - External Regulator With V ent Pointing Down External Regulator Propane/LP Supply T ank V ent Pointing Down T ypical Inlet Pipe Diam.
www .desatech.com 107882-01K 13 INST ALLA TION Continued * A CSA design-c ertified equipment shutof f valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA des ign -ce rtifi ed equi pme nt shut of f valve fro m your dealer .
www .desatech.com 107882-01K 14 PRESSURE TESTING HEA TER GAS CONNECTIONS 1. Open equipment shutof f valve (see Figure 16, page 13). 2. For natural gas open main gas valve located on or near gas meter . For propane /LP gas open propane/LP supply tank valve.
www .desatech.com 107882-01K 15 O F F P I L O T 5. Turn cont rol knob counte rclo ckwi se to the PILOT position. Press in control knob for five (5) seconds (see Figur e 19). Note: Y ou may be running this heater for the first time after hooking up to gas sup - ply .
www .desatech.com 107882-01K 16 MANUAL LIGHTING PROCEDURE 1. Remo ve fr ont pane l (s ee Figu re 7, page 9) . 2. Follow steps 1 through 5 under Lighting Instructions , page 14. 3. Wit h contr ol knob pres sed in, strike match. Hold match to pilot until pilot lights.
www .desatech.com 107882-01K 17 CLEANING AND MAINTENANCE W ARNING: T urn off heater and let cool before cleaning. CAUTION: Y ou must keep control areas, burner , and circu- lating air passage ways of heater clean. Inspect the se areas of heater before each use.
www .desatech.com 107882-01K 18 SPECIFICA TIONS CB N2 0/ CBN2 0T CBN30T CBT20NT CBT30NT SBN20 Btu (V ariable) 10,000/20,000 15,000/30,000 10,000/20,000 15,000/30,000 T ype Gas --------------------------------Natural Only--------------------------------- Ignition Piezo Piezo Electronic Electronic Pressure Regulator Setting 3" W .
www .desatech.com 107882-01K 19 TROUBLESHOO TING W ARN IN G: T urn off an d unpl ug h eat er a nd le t cool bef ore ser vi ci ng. Only a qualified service person should service and repair heater . CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot.
www .desatech.com 107882-01K 20 POSSIBLE CAUSE 1. C o n tr ol k no b n o t f u ll y pr es se d 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 . Thermocouple connection loose at control valve 6.
www .desatech.com 107882-01K 21 TROUBLESHOO TING Continued POSSIBLE CAUSE 1. Turning control knob to posi- tion 5 when burner is cold 2. Air in gas line 3. A ir p as s ag e wa y s o n h e at e r blocked 4 . Dirty or partially clogged burner orifice 1 .
www .desatech.com 107882-01K 22 TROUBLESHOO TING Continued POSSIBLE CAUSE 1. G a s l e a k . See Warning statement on page 21 2. Control valve defective 1. Foreign matter between con - trol valve and burner 2. G a s l e a k . See Warning statement on page 21 1.
www .desatech.com 107882-01K 23 F AN KITS - GA3250T For all models. Provides better heat distribution. Make s heate r more effici ent. Comple te installa tion and operating instructions included. Therm ostat icall y-con troll ed, blower turns itself on and off as required.
www .desatech.com 107882-01K 24 2 3 5 6 8 9 9 10 11 12 13 14 16 18 19 4 7 1 21 20 15 17 22 ILL USTRA TED P ARTS BREAKDOWN MODELS CBN20 CBP20 SBN20 SBP20.
www .desatech.com 107882-01K 25 P ARTS LIST This list contains replaceable parts used in your heater . When ordering parts, follow the instructions listed under Replacement Parts on page 22 of this manual. P ART NUMBER KEY CBN20 CBP20 NO. SBN20 SBP20 DESCRIPTION QTY .
www .desatech.com 107882-01K 26 ILL USTRA TED P ARTS BREAKDOWN MODELS CBN20T , CBP20T CBN30T , CBP30T CBN20TK, CBP20TK 2 9 9 10 11 12 13 14 16 18 19 4 7 1 15 17 3 5 6 8 20.
www .desatech.com 107882-01K 27 P ARTS LIST This list contains replaceable parts used in your heater . When ordering parts, follow the instructions listed under Replacement Parts on page 22 of this manual. P ART NUMBER KEY CBN20T CBP20TK NO. CBN20TK CBP20T CBN30T CBP30T DESCRIPTION QTY .
www .desatech.com 107882-01K 28 ILL USTRA TED P ARTS BREAKDOWN MODELS CBT20NT , CBT20PT CBT30NT , CBT30PT 20 2 12 13 7 15 3 5 6 8 9 4 1 17 19 14 18 16 9 10 11 AA Battery Positive UP AAA Battery Negati.
www .desatech.com 107882-01K 29 P ARTS LIST This list contains replaceable parts used in your heater . When ordering parts, follow the instructions listed under Replacement Parts on page 22 of this manual. KEY P ART NUMBER NO. CBT20NT CBT20PT CBT30NT CBT30PT DESCRIPTION QTY .
www .desatech.com 107882-01K 30 T ool and Equipment, Co. 5 Manila A ve Hamden, CT 06514-0322 1-800-397-7553 203-248-7553 Portable Heater Parts 342 N. County Rd. 400 East V alparaiso, IN 46383-9704 219-462-7441 1-888-619-7060 www .portableheaterparts.com sales@portableheaterparts.
www .desatech.com 107882-01K 31 _____________________________________________________ ______________________________________________________ ______________________________________________________ ____.
WARRANTY INFORMA TION KEEP THIS WARRANTY Model ____________________________________ Serial No. __________________________________ Date of Purchase ____________________________ LIMITED WARRANTY VENT -F.
An important point after buying a device Desa CBT20NT (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 CBT20NT 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 CBT20NT - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Desa CBT20NT you will learn all the available features of the product, as well as information on its operation. The information that you get Desa CBT20NT will certainly help you make a decision on the purchase.
If you already are a holder of Desa CBT20NT, 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 CBT20NT.
However, one of the most important roles played by the user manual is to help in solving problems with Desa CBT20NT. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Desa CBT20NT 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
