Desa VF-18N-MHd - Manuals - manualsarea.com

Page 2 - Air for Combustion and Ventilation; TaBle oF CoNTeNTs

www.desatech.com 116986-01B WARNING: 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, s...

Page 3 - saFeTy INFoRMaTIoN; Early signs of carbon; Get fresh; this heater or its controls can

www.desatech.com 116986-01B 3 WARNING: Do not allow fans to blow directly into the heater. Avoid any drafts that alter burner flame patterns. Ceiling fans can create drafts that alter burner flame patterns. Altered burner patterns can cause sooting. WARNING: Do not place log scraps or lava rocks on ...

Page 4 - Continued; and to replace any part of the control system and; State of Massachusetts:; bedroom and bathroom installation in the; PRodUCT; Figure 1 - Product Identification

www.desatech.com 116986-01B 4 1. This appliance is only for use with the type of gas indicated on the rating plate. This appliance 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 (propane/LP uni...

Page 5 - loCal Codes; est edition of; UNPaCkING; CAUTION: Do not remove the; PRodUCT FeaTURes; OPERATION; aIR FoR CoMBUsTIoN; WARNING: This heater shall; National Fuel; Unusually Tight Construction

www.desatech.com 116986-01B 5 loCal Codes Install and use heater with care. Follow all local codes. In the absence of local codes, use the lat - est edition of The National Fuel Gas Code ANSI Z223.1/NFPA 54 *. *Available from: American National Standards Institute, Inc. 1430 Broadway New York, NY 10...

Page 6 - Ventilation Air From Outdoors; If your home does not meet all of the three; Determining

www.desatech.com 116986-01B 6 Unusually tight construction is defined as construction where: a. walls and ceilings exposed to the out - side atmosphere have a continuous water vapor retarder with a rating of one perm (6 x 10 -11 kg per pa-sec-m 2 ) or less with openings gasketed or sealed and b. wea...

Page 7 - WARNING: If the area in; National Fuel Gas Code,; VENTILATION AIR; Ventilation Air From Inside Building; National Fuel Gas; Section 5.3, Air for Combustion and Ventilation

www.desatech.com 116986-01B aIR FoR CoMBUsTIoN aNd VeNTIlaTIoN Continued If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an uncon - fined space. You will need no additional fresh air ventilation. WARNING: If the area in which the heater may be oper - ate...

Page 8 - INsTallaTIoN; ing Diagram; Air; CHECK GAS TYPE

www.desatech.com 116986-01B 8 INsTallaTIoN 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 heating system, you may run system’s circulating blower wh...

Page 9 - WARNING: Maintain the; Figure 4 - Minimum Clearance for

www.desatech.com 116986-01B 9 INSTALLATION AND CLEARANCES FOR VENT-FREE OPERATION WARNING: Maintain the minimum clearances. If you can, provide greater clearances from floor, ceiling and adjoining wall. INsTallaTIoN Continued Carefully follow the instructions below. This will ensure safe installatio...

Page 10 - Figure 6 - Minimum Mantel Clearances Without Using Hood; Figure 7 - Minimum Mantel Clearances When Using Hood; Noncombustible; Noncombustible material OK

www.desatech.com 116986-01B 10 Figure 6 - Minimum Mantel Clearances Without Using Hood MinimumNoncombustible Material MinimumNoncombustible Material Height Distances to Underside ofMantel Top ofFireplaceOpening Underside ofMantel Shelf Mantel Shelf 12" ( A ) 18" 20" 22" 24" All m...

Page 11 - MANTEL CLEARANCES; Determining Minimum Mantel Clearance; FLOOR CLEARANCES; Figure 8 - Minimum Fireplace Clearances; INSTALLING HEATER ASSEMBLY

www.desatech.com 116986-01B 11 MANTEL CLEARANCES In addition to meeting noncombustible material clearances, you must also meet required clearances between fireplace openings and mantel shelf on each side of the fireplace. If you do not meet the clearances listed below, you will need a hood. Determin...

Page 12 - CONNECTING TO GAS SUPPLY; CAUTION: Never connect; Fitting; • sediment trap; Installation Items Needed; Connecting to

www.desatech.com 116986-01B 1 CONNECTING TO GAS SUPPLY WARNING: This appliance requires a 1/2" NPT (National Pipe Thread) inlet connection to the shutoff valve. WARNING: A qualified service person must connect heater to gas supply. Follow all local codes. CAUTION: Never connect propane/LP firepl...

Page 13 - Accessories; Natural Gas; From Gas Meter; CHECkING GAS CONNECTIONS; and connections, internal and; necting to Gas Supply

www.desatech.com 116986-01B 13 We recommend that you install a sediment trap in supply line as shown in Figure 12. Locate sediment trap where it is within reach for cleaning. Install in piping system between fuel supply and heater. Locate sediment trap where trapped matter is not likely to freeze. A...

Page 14 - To Turn Off Gas to Appli-; PRESSURE TESTING HEATER GAS

www.desatech.com 116986-01B 14 INsTallaTIoN Continued 4. Check all joints from equipment shutoff valve to control valve (see Figure 14 or 15). Apply noncorrosive leak detection fluid to all joints. Bubbles forming show a leak. 5. Correct all leaks at once. 6. Light heater (see Operating Heater, page...

Page 15 - oPeRaTING HeaTeR; FOR YOUR SAFETY; low these instructions exactly,; REMOTE LIGHTING; erate heater with doors closed,

www.desatech.com 116986-01B 15 oPeRaTING HeaTeR FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: 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. Wh...

Page 16 - Troubleshooting; FUNCTIONS OF; Battery; Identifying Error Signals; Changing Mode of Operation; MAN; Figure 17 - Control Panel for Hand-Held Remote

www.desatech.com 116986-01B 16 6. Press the buttons and at the same time. A short acoustic signal confirms the start sequence has begun. Further short acoustic signals (0.2 sec., 1 Hz) indicate the ignition process until it is com- pleted and main gas flows. If pilot is already lit, motor will turn ...

Page 17 - Setting the Temperature; MANUAL LIGHTING; WARNING: Manual lighting; Lighting with a Match; Piezo Ignitor

www.desatech.com 116986-01B 1 oPeRaTING HeaTeR Continued • Timer: The timer mode ( TIMER ) operates much like the temperature mode above. The timer setting allows you to set specific times for on and off. (There are 2 burner on and 2 burner off cycles every 24 hours.) If the reading for the nighttim...

Page 18 - Lighting with Piezo Ignitor; Wiring Diagram; TO TURN GAS OFF; Shutting Off Heater; INsPeCTING BURNeRs; PILOT FLAME PATTERN; Thermocouple

www.desatech.com 116986-01B 18 Lighting with Piezo Ignitor 1. Disconnect ignitor cable from receiver and connect to Piezo Ignitor Tab (see Figure 18, page 17 and Wiring Diagram on page 24). 2. STOP! Read safety information on page 15, 3. Make sure equipment shutoff valve is fully open. 4. Turn Motor...

Page 19 - BURNER FLAME PATTERN; To Turn Off Gas to Ap-; CleaNING aNd; WARNING: Turn off heater; BURNER INjECTOR HOLDER AIR

www.desatech.com 116986-01B 19 BURNER FLAME PATTERN Figure 22 shows correct burner flame pattern. NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles are burned by heater, causing brief patches of orange flame. If burner flame pattern is incorrect, as shown in Figu...

Page 21 - TRoUBlesHooTING; WARNING: Turn off heater and let cool before servicing. Only a; POSSIBLE CAUSE

www.desatech.com 116986-01B 1 TRoUBlesHooTING WARNING: Turn 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. Note: All troubleshooting it...

Page 22 - OBSERVED PROBLEM; or propane/LP gas company; damaged

www.desatech.com 116986-01B TRoUBlesHooTING Continued OBSERVED PROBLEM Burner backfiring during com - bustion Orange flame in burner during burner combustion Slight smoke or odor during initial operation (first hour) Heater produces a whistling noise when burner is lit White powder residue forming w...

Page 23 - IMPORTANT; REMEDY; control; odors

www.desatech.com 116986-01B 3 TRoUBlesHooTING Continued WARNING: 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 s...

Page 24 - WIRING dIaGRaM; IDENTIFYING ERROR SIGNALS FROM RECEIVER

www.desatech.com 116986-01B 4 WIRING dIaGRaM SPARK SPARK Pilot 4 AA Batteries ON/OFF Switch Thermocurrent Interrupter Block SW SW TC TC Battery Compartment MAGRMOSW P ANEL Receiver Antenna Ignition Cable Thermocouple ThermocurrentInterrupter Block Combination Control ON/OFF Switch (Optional) OFF ON ...

Page 25 - seRVICe HINTs; When Gas Pressure Is Too Low; TeCHNICal seRVICe; site at; aCCessoRIes; PARTS UNDER WARRANTY

www.desatech.com 116986-01B 5 EQUIPMENT SHUTOFF VALVE GA5010 For all models. Equipment shutoff valve with 1/8" NPT tap. Fits 1/2" NPT pipe. seRVICe HINTs When Gas Pressure Is Too Low • pilot will not stay lit • burners will have delayed ignition • heater will not produce specified heat • pro...

Page 26 - IllUsTRaTed PaRTs BReakdoWN

www.desatech.com 116986-01B 6 IllUsTRaTed PaRTs BReakdoWN MODELS VF-18N-MHD, VF-18P-MHD, VF-24N-MHD AND VF-24P-MHD 1 2 3 4 5 2522 7 8 18 9 6 10 11 26 34 23 12 21 20 29 28 29 28 27 24 27 2422 13 19 14 32 30 15 15 15 15 15 15 31 15 15 15 15 15 15 15 15 16 17 16 33

Page 27 - PaRTs lIsT; listed under

www.desatech.com 116986-01B PaRTs 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 NO. PART NUMBER DESCRIPTION QTY. VF-18N-MHD VF-18P-MHD VF-24N-MHD VF-24P-MHD 1 116950-01 116950-...

Page 28 - NOT A UPC; WaRRaNTy INFoRMaTIoN; keeP THIs WaRRaNTy; Date Purchased; lIMITed WaRRaNTy

01 Industrial DriveP.O. Box 90004Bowling Green, KY 410-9004www.desatech.com NOT A UPC WaRRaNTy INFoRMaTIoN keeP THIs WaRRaNTy 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 wit...