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UNVENTED (VENT-FREE) GAS LOG HEAT ER
OWNER’S OP ER A TION AND IN STAL LATION MANU AL
For more information, visit www.desatech.com
VF-24N-PDG, VF-24P-PDG, VF-24N-BTB, VF-24P-BTB,
VF-18N-PDG, VF-18P-PDG VF-18N-BTB, VF-18P-BTB
Design Dynamics Ventfree Mod els Also De sign-Certi fi ed As Vented Dec o rativ e Ap pli anc es
WARNING: Improper in stal la tion, ad just -
WARNING: If the information in this man u al
ment, al tera tion, service, or main te nance
is not followed exactly, a fi re or explos
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TABLE OF CONTENTS 2 SAFETY INFORMATION TABLE OF CONTENTS SAFETY INFORMATION..............................................................2 TROUBLESHOOTING................................................................19 PRODUCT IDENTIFICATION.......................................................3 SPECIFICATIONS......................................................................22 OPTIONAL REMOTE CONTROL ACCESSORIES......................4 WIRING DIAGRAM .......................................
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SAFETY INFORMATION 3 PRODUCT IDENTIFICATION 3 SAFETY INFORMATION Continued 14. Turn heater off and let cool before ser vic ing, installing, or 1. This appliance is only for use with the type of gas indicated on re pair ing. Make sure the selector switch is in the OFF position the rating plate. This appliance is not convertible for use with (Remote-Ready Models Only). Only a qual i fi ed ser vice per son other gases. should install, ser vice, or repair heater. 2. Do not place propane/
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OPTIONAL REMOTE CONTROL ACCESSORIES 4 LOCAL CODES UNPACKING PRODUCT FEATURES AIR FOR COMBUSTION AND VENTILATION Providing Adequate Ventilation OPTIONAL REMOTE CONTROL ACCESSORIES SAFETY DEVICE There are four optional remote controls that can be purchased This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff sys tem. The ODS/pilot is a re quired fea ture for vent- separately for Remote-Ready Models Only: free room heat ers. The ODS/pilot shuts off the heater if there is
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AIR FOR COMBUSTION AND VENTILATION 5 Providing Adequate Ventilation (Cont.) 5 Determining Fresh-Air Flow for Heater Location If additional ventilation to adjoining room is supplied with grills or open- AIR FOR COMBUSTION AND ings, add the volume of these rooms to the total vol ume of the space. VENTILATION 2. Multiply the space volume by 20 to determine the maximum Btu/Hr Continued the space can support. Unusually tight construction is de fi ned as construction __________
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AIR FOR COMBUSTION AND VENTILATION Ventilation Air 6 AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR 12" Ventilation Air From Inside Building This fresh air would come from an adjoining unconfi ned space. When ventilating to an adjoining unconfi ned space, you must pro vide two Ventilation permanent open ings: one within 12" of the ceiling and one within Ventilation Grills Grills 12" of the fl oor on the wall con nect ing the two spaces (see options Into Adjoining Room, Into Ad
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INSTALLATION 7 Check Gas Type 7 Installation and Clearances for Vent-Free Operation INSTALLATION CAUTION: This heater cre ates warm air currents. NOTICE: This heater is in tend ed for use as sup ple - These currents move heat to wall sur fac es next to men tal heat. Use this heater along with your pri ma ry heater. Installing heater next to vinyl or cloth wall cov- heat ing system. Do not in stall this heat er as your pri- er ings or operating heater where im pu ri ties (such as, ma ry h
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INSTALLATION Installation and Clearances for Vent-Free Operation (Cont.) 8 INSTALLATION Continued Carefully follow the instructions below. This will ensure safe in- noncom b us ti ble ma te ri al behind it. Noncomb ustible ma te ri al must stal la tion into a masonry, UL127-listed manufactured fi replace, or extend at least 8" up (for all mod els). If noncombustible ma te ri al list ed vent-free fi re box. is less than 12", you must install the fi re place hood accessory (24" and 30" Models On
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INSTALLATION 9 Mantel Clearances 9 Floor Clearances INSTALLATION Continued MANTEL CLEARANCES In addition to meeting noncom bus ti ble ma te ri al clearances, you must also Mantel Shelf meet required clearances between fi replace open ing and mantel shelf. If 10" Underside of 8" you do not meet the clear anc es listed below, you will need a hood. Mantel Shelf 6" 1 2 /2" Determining Minimum Mantel Clearance All minimum If you meet min i mum clear ance be tween mantel shelf and top of distances
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INSTALLATION Installing Damper Clamp Accessory for Vented Operation 10 Installing Heater Assembly INSTALLATION Continued INSTALLING HEATER ASSEMBLY INSTALLING DAMPER CLAMP ACCESSORY WARNING: If installing in a sunken fi re place, special care is needed. You must raise the fi re place FOR VENTED OPERATION fl oor to allow access to heat er control panel. This will Note: When used as a vented decorative, ap pli ance must be installed in sure ad e quate air fl ow and guard against soot ing. only
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INSTALLATION 11 Installing Heater Assembly (Cont.) 11 INSTALLATION Continued CONNECTING TO GAS SUPPLY Installation must include an equipment shutoff valve, union, and WARNING: This appliance requires a 3/8" NPT plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge (National Pipe Thread) inlet connection to the pres- hook up. NPT tap must be up stream from heater (see Figure 13 sure regulator. page 12, depending on your model). IMPORTANT: Install equipment shutoff valve in an ac
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INSTALLATION Connecting To Gas Supply 12 CHECKING GAS CONNECTIONS INSTALLATION Continued 2. Cap off open end of gas pipe where equip ment shutoff valve was con nect ed. CSA Design-Certifi ed Equipment PROPANE/LP 3. Pressurize supply pip ing sys tem by ei ther opening pro pane/LP Shutoff Valve With 1/8" NPT Tap* - From External sup ply tank valve for propane/LP gas or opening main gas valve Approved Flexible Regulator lo cat ed on or near gas meter for natural gas, or using com presse
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INSTALLATION 13 Connecting to Gas Supply (Cont.) 13 Checking Gas Connections INSTALLATION Continued Equipment Shutoff Valve Propane/LP Thermostat Gas Supply Tank Valve or Control Valve Location Figure 15 - Checking Gas Joints (propane/LP only) Thermostat Gas Thermostat Gas Valve or Control Valve or Control Valve Location Valve Location Gas Meter Figure 16 - Checking Gas Joints (Natural Gas Only) For more information, visit www.desatech.com 111826-01
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O N O T 14 OPERATING HEATER (REMOTE-READY MODELS) For Your Safety Read Before Lighting OPERATING HEATER NOTICE: During initial operation of new heat er, burn- ing logs will give off a paper-burning smell. Orange fl ame will also be present. Open damper or window REMOTE-READY MODELS to vent smell. This will only last a few hours. FOR YOUR SAFETY READ Note: Home owners generally prefer to op er ate their heater BEFORE LIGHTING with the chimney damper closed. This will put all the heat into th
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O REMOTE OFF ON N O T OPERATING HEATER (REMOTE-READY MODELS) 15 For Your Safety Read Before Lighting (Cont.) 15 Lighting Instructions OPERATING HEATER Continued Ignitor 7. With control knob pressed in, press and release ignitor but- Pilot Ignitor Pilot Electrode ton. This will light pilot. The pilot is attached to the front Burner Electrode Burner burner. If needed, keep press ing ig ni tor button until pilot lights. Note: If pilot does not stay lit, con tact a qualifi ed service
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O REMOTE OFF ON N O T OPERATING HEATER (REMOTE-READY MODELS) Lighting Instructions (Cont.) 16 To Turn Gas Off To Appliance Manual Lighting Procedure Optional Remote Operation 3. To turn the burner off, press the AUTO/ON/OFF button OPERATING HEATER un til OFF lights. The pi lot will remain lit. Continued IMPORTANT: To turn the pilot off, man u al ly turn the con trol knob on the heat er to the OFF position. IMPORTANT: Do not leave the se lec tor switch in the RE- MOTE or O
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INSPECTING BURNERS 17 Pilot Flame Pattern 17 Front Burner Flame Pattern INSPECTING BURNERS Check pilot fl ame pattern and burner fl ame patterns often. BURNER FLAME PATTERN Figure 24 shows correct front burner fl ame pattern. PILOT FLAME PATTERN NOTICE: Do not mistake orange fl ames with yellow Figure 22 shows a correct pilot fl ame pat tern. Figure 23 shows an tipping. Dirt or other fi ne particles are burned by heat er, incorrect pilot fl ame pattern. The incorrect pilot fl ame is not touch ing c
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CLEANING AND MAINTENANCE Cleaning Burner Injector Holder and Pilot Air Inlet Hole 18 Logs CLEANING AND MAINTENANCE LOGS • If you remove logs for cleaning, re fer to Installing Logs, page WARNING: Turn off heater and let cool before 14, to prop er ly re place logs. cleaning. • Replace log(s) if broken or chipped (dime-sized or larger). CA UTION: You must keep control areas, burners, and circu lat ing air pas sage ways of heat er clean. In- spect these areas of heater before each use. Ha
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TROUBLESHOOTING 19 19 TROUBLESHOOTING CA UTION: Never use a wire, WARNING: Turn off and un- Note: For additional help, visit DESA needle, or similar object to clean plug heater and let cool before In ter na tion al’ s technical service web ODS/pilot. This can damage ODS/ servicing. Only a qualifi ed service site at www.desatech.com. person should service and repair Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor but
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TROUBLESHOOTING 20 TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY One or both burner does not light after 1. Inlet gas pressure is too low 1. Contact local natural or pro pane/LP gas ODS/pilot is lit company 2. Burner orifi ce(s) clogged 2. Clean burner(s) (see Cleaning and Main te nance, page 19) or re place burner orifi ce(s) 3. Mislocated crossover tube 3. Contact qualifi ed service person 4. Burner orifi ce(s) di ame ter is too small 4. Replace burner orifi ce(s) 5.
