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UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
For more information, visit www.desatech.com
VF-24N-EMU
VF-24P-EMU
VF-18N-EMU
VF-18P-EMU
ANSI Z21.11.2-2002
Approved
Certified
Design Dynamics Vent-free Models Also Design-Certified As Vented Decorative Appliances
WARNING: Improper installation, adjust-
WARNING: If the information in this manual
ment, alteration, service, or maintenance
is not followed exactly, a fire or explosion
can cause injury or property damage. R
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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 servicing, installing, or 1. This appliance is only for use with the type of gas indicated on repairing. 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 qualified service person other gases. should install, service, or repair heater. 2. Do not place propane/LP supply tank(s)
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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 system. The ODS/pilot is a required feature for vent- separately for Remote-Ready Models Only: free room heaters. The ODS/pilot shuts off the heater if there is no
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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 volume 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 defined as construction ____________(volume of space) x
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AIR FOR COMBUSTION AND VENTILATION Ventilation Air 6 AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building 12" This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two Ventilation permanent openings: one within 12" of the ceiling and one within Ventilation Grills Grills 12" of the floor on the wall connecting the two spaces (see options Into Adjoining Room, Into Adjoinin
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INSTALLATION 7 Check Gas Type 7 Installation and Clearances for Vent-Free Operation INSTALLATION NOTICE: This heater is intended for use as supple- CAUTION: This heater creates warm air currents. mental heat. Use this heater along with your primary These currents move heat to wall surfaces next to heating system. Do not install this heater as your pri- heater. Installing heater next to vinyl or cloth wall cov- mary heat source. If you have a central heating system, erings or operating hea
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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- noncombustible material behind it. Noncombustible material must stallation into a masonry, UL127-listed manufactured fireplace, or extend at least 8" up (for all models). If noncombustible material listed vent-free firebox. is less than 12", you must install the fireplace hood accessory (24" and 30" Models Only). See Figure 5 for mi
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INSTALLATION 9 Mantel Clearances 9 Floor Clearances INSTALLATION Continued Mantel Shelf 10" Underside of 8" Mantel Shelf MANTEL CLEARANCES 6" 1 2 /2" In addition to meeting noncombustible material clearances, you must also meet required clearances between fireplace opening and mantel shelf. If All minimum you do not meet the clearances listed below, you will need a hood. distances are in inches Minimum Non- Determining Minimum Mantel Clearance (A) Combustible Log Set Material 12" 18" 20" 22
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INSTALLATION Installing Damper Clamp Accessory for Vented Operation 10 Installing Heater Assembly INSTALLATION Continued INSTALLING DAMPER CLAMP ACCESSORY INSTALLING HEATER ASSEMBLY FOR VENTED OPERATION WARNING: If installing in a sunken fireplace, special care is needed. You must raise the fireplace Note: When used as a vented decorative, appliance must be installed only in a solid-fuel burning fireplace with a working flue and con- floor to allow access to heater control panel. This will stru
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INSTALLATION 11 Installing Heater Assembly (Cont.) 11 Connecting to Gas Supply 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 upstream from heater (see Figure 13 sure regulator. page 12, depending on your model). IMPORTANT: Install equipment
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INSTALLATION Connecting To Gas Supply (Cont.) 12 Checking Gas Connections CHECKING GAS CONNECTIONS INSTALLATION Continued 2. Cap off open end of gas pipe where equipment shutoff valve was connected. CSA Design-Certified Equipment PROPANE/LP 3. Pressurize supply piping system by either opening propane/LP Shutoff Valve With 1/8" NPT Tap* - From External supply tank valve for propane/LP gas or opening main gas valve Approved Flexible Regulator located on or near gas meter for natural gas, or
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INSTALLATION 13 Checking Gas Connections (Cont.) 13 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 111826-05
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O N O T 14 OPERATING HEATER (REMOTE-READY MODELS) For Your Safety Read Before Lighting Lighting Instructions OPERATING HEATER NOTICE: During initial operation of new heater, burn- REMOTE-READY MODELS ing logs will give off a paper-burning smell. Orange flame will also be present. Open damper or window FOR YOUR SAFETY READ to vent smell. This will only last a few hours. BEFORE LIGHTING Note: Home owners generally prefer to operate their heater with the chimney damper closed. This will put all
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O REMOTE OFF ON OPERATING HEATER (REMOTE-READY MODELS) 15 Lighting Instructions (Cont.) 15 To Turn Off Gas To Appliance Manual Lighting Procedure Remote Control Operation 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 pressing ignitor button until pilot lights. Note: If pilot does not stay lit, c
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O REMOTE OFF ON OPERATING HEATER (REMOTE-READY MODELS) Remote Control Operation (Cont.) 16 OPERATING HEATER Continued IMPORTANT: Do not leave the selector switch in the RE- MOTE or ON position when the pilot is not lit. This will drain the battery. 2. Press the ON/OFF button to turn the burners on and off. When turning burners off, the pilot will remain lit. IMPORTANT: Be sure to press the ON/OFF buttons on the hand-held remote control unit for up to 3 seconds to assure proper operatio
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INSPECTING BURNERS 17 Pilot Flame Pattern 17 Burner Flame Pattern INSPECTING BURNERS Check pilot flame pattern and burner flame patterns often. BURNER FLAME PATTERN Figure 24 shows correct burner flame pattern. PILOT FLAME PATTERN NOTICE: Do not mistake orange flames with yellow Figure 22 shows a correct pilot flame pattern. Figure 23 shows an tipping. Dirt or other fine particles are burned by heater, incorrect pilot flame pattern. The incorrect pilot flame is not touching causing brief patches of
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CLEANING AND MAINTENANCE Cleaning Burner Injector Holder and Pilot Air Inlet Hole 18 CLEANING AND MAINTENANCE if compressed air is not available. LOGS WARNING: Turn off heater and let cool before cleaning. • If you remove logs for cleaning, refer to Installing Logs, page 14, to properly replace logs. CAUTION: You must keep control areas, burners, Injector and circulating air passageways of heater clean. In- Holder spect these areas of heater before each use. Have heater inspected y
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TROUBLESHOOTING 19 19 TROUBLESHOOTING Note: For additional help, visit WARNING: �Turn off and un- CAUTION: Never use a wire, DESA technical service web site at plug heater and let cool before needle, or similar object to clean www.desatech.com. servicing. Only a qualified service ODS/pilot. This can damage ODS/ person should service and repair pilot unit. Note: All troubleshooting items are listed heater. in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button
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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 propane/LP gas ODS/pilot is lit company 2. Burner orifice(s) clogged 2. Clean burner(s) (see Cleaning and Maintenance, page 18) or replace burner orifice(s) 3. Mislocated crossover tube 3. Contact qualified service person 4. Burner orifice(s) diameter is too small 4. Replace burner orifice(s) 5. Remote selector in
