Desa VN20BT manual

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. — Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any[...]

www .desatech.com 107886-01J 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 . W ARNING: T[...]

www .desatech.com 107886-01J 3 SAFETY INFORMA TION IMPORTANT: Read this owner’s man ual caref ull y a nd compl ete ly b e f o r e t r y i n g t o a s s e m b l e , operate or service this heater. Improper use of this heater can cause serious injury or death from burns, fire, explosion, e l e c t r i c a l sh o c k an d c a r b o n monoxide poison[...]

www .desatech.com 107886-01J 4 6. Keep all air openings in front and bottom of heater clear and free of debris. This will insure enough air for proper combustion. 7. If heater shuts off, do not relight until you provide fresh, outside air . If heater keeps shutting off, have it serviced. 8. Do not run heater • where flammable liquids or vapors a[...]

www .desatech.com 107886-01J 5 AIR FOR COMB USTION AND VENTILA TION WAR NING : Thi s hea ter shall not be installed in a confined space or unusually tight con - struction unless provisions are prov ide d fo r ad equa te c omb us- tion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning ap[...]

www .desatech.com 107886-01J 6 AIR FOR COMB USTION AND VENTILA TION Continued DETERMINING FRESH-AIR FLOW FOR HEA TER LOCA TION Determining if Y ou Have a Confined or Unconfined Space Use this work sheet to determine if you have a con- fined or unconfined space. Space: Includes the room in which you will install heater plus any adjoining rooms w[...]

www .desatech.com 107886-01J 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 space, you must provide two perma- nent openings: one within 12” of the ceiling and one within 12” of the floor on the wall connecting the two space[...]

www .desatech.com 107886-01J 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) • piping (check local codes) • sealant (resistant to propane/LP gas) • equipment shutoff valve * • ground joint union • test gauge connection* •[...]

www .desatech.com 107886-01J 9 THERMOST A T SENSING BULB The thermostat sensing bulb has been placed 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. Mounti ng hole is loca ted on lower left edge on back of h[...]

www .desatech.com 107886-01J 10 INST ALLA TION Continued Attaching Mounting Bracket T o W all Note: W all anchors, mounting screws and spacers are in hardware package. The hardware package is provided with heater . Attaching T o W all Stud Method For attaching mounting bracket to wall studs 1. Drill holes at marked locations using 9/64" drill [...]

www .desatech.com 107886-01J 1 1 4. If installing bottom mounting screws into hollow or solid wall, install wall anchors. Follow steps 1 through 4 under Attaching T o W all Anchor Method , page 10 If installing bottom mounting screw into wall stud, drill holes at marked locations using 9/64" drill bit. 5. Replace heater onto mounting bracket. [...]

www .desatech.com 107886-01J 12 IMPORT ANT : Hold the pressure regulator with wrench when connecting it to gas piping and/or fittings. Do not over tighten pipe connection to regulator . The regulator body could be damaged. CA U T I ON : U se o n l y n e w , b la c k i r o n or s te el p ip e. I nt er na ll y- ti nn ed c o p p e r tu bi ng m ay be [...]

www .desatech.com 107886-01J 13 INST ALLA TION Continued CAUTION: For propane/LP gas, make sure external regula- tor has been installed between propane/LP supply and heater . See guidelines under Connect- ing to Gas Supply , page 1 1. PRESSURE TESTING GAS SUPPL Y PIPING SYSTEM T est P ress ure s In E xc ess Of 1/ 2 PS IG ( 3.5 kPa ) 1. D is co nn e[...]

www .desatech.com 107886-01J 14 5. T urn contro l knob counter clockwise 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 . If so, the control knob may need to be pressed in for 30 seconds or more. This will allow air to b[...]

www .desatech.com 107886-01J 15 BURNER FLAME P A TTERN WARNING: If yellow tipping occurs, your heater could pro- duce increased levels of carbon monoxide. NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles enter the heater and burn causing brief patches of orange flame. OPERA TING HEA TER Continued 8. T urn co[...]

www .desatech.com 107886-01J 16 Figure 23 - Correct Burner Flame Pattern Y ellow T ipping Figure 24 - Incorrect Burner Flame Pattern 1/2 Glass Height Blue Flame 1/2 Glass Height 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 passageways of he ater[...]

www .desatech.com 107886-01J 17 SPECIFICA TIONS VN20BT VN30BT Btu (V ariable) 10,000/20,000 15,000/30,000 T ype Gas Natural Natural Ignition Piezo Piezo Pressure Regulator Setting 3" W .C. 3" W .C. Inlet Gas Pressure (in. of water) Maximum 10.5" 10.5" Minimum 4" 4" Dimensions, Inches (H x W x D) Heater (Includes knobs [...]

www .desatech.com 107886-01J 18 TROUBLESHOO TING W AR NIN G: T urn off a nd u np lu g heat er and let c oo l bef ore ser vici ng . 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. Note: All troubleshooting items are listed in o[...]

www .desatech.com 107886-01J 19 POSSIBLE CAUSE 1 . Control knob not fully pressed in 2. Control knob not pressed in long enough 3. Sa fet y in ter lo ck s ys tem h as been triggered 4. Equipment shutoff valve not fully open 5 . Thermocouple connection loose at control valve 6. Pilot flame not touching ther - mocouple, which allows ther - m o c o u[...]

www .desatech.com 107886-01J 20 TROUBLESHOO TING Continued 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. Fol- low the gas supplier ’ s instructions. • If[...]

www .desatech.com 107886-01J 21 TROUBLESHOO TING Continued POSSIBLE CAUSE 1 . Gas leak. See Warning statement on page 21 2. Control valve defective 1. Foreign matter between con - trol valve and burner 2 . Gas leak. See Warning statement on page 21 1. Not enough combustion/ven - tilation air OBSERVED PROBLEM Gas odor even when control knob is in OF[...]

www .desatech.com 107886-01J 22 ILL USTRA TED P ARTS BREAKDOWN MODELS VN20BT , VP20BT VN30BT , VP30BT 2 3 5 6 8 9 10 10 1 1 12 13 14 16 18 19 4 7 1 15 17 20[...]

www .desatech.com 107886-01J 23 P ARTS LIST This list contains replaceable parts used in your heater . When ordering parts, follow the instructions listed under Replacement Parts on page 21 of this manual. KEY P ART NUMBER NO. VN20BT VP20BT VN30BT VP30BT DESCRIPTION QTY . 1 097159-04 097159-04 097159-04 097159-04 Piezo Ignitor 1 2 107672-01 107672-[...]

Model ____________________________________ Serial No. __________________________________ Date of Purchase ____________________________ WARRANTY INFORMA TION KEEP THIS WARRANTY LIMITED WARRANTY VENT -FREE RESIDENTIAL GAS HEA TERS DESA Heating Products warrants this product to be free from defects in materials and components for four (4) years from t[...]