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UNVENTED (VENT-FREE)
NATURAL GAS LOG HEATER
Manually Control Models Also Designed Certified as Vented Decorative Appliance)
This appliance may be installed in an aftermarket* manufactured (mobile) home,
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
OWNER'S OPERATION AND INSTALLATION MANUAL
SPLIT OAK DESIGN
18" (Non "A" Model), 24", 30"
("A" Models) Variable Manually-Controlled,
and ("A" Models) Thermostatically-Controlled
WARNING: If the information in this manual is
not followed 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 other appliance.
— WHAT TO DO IF YOU SMELL GAS
• 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. Follow the gas
supplier's instructions.
• If you cannot reach your gas supplier,
call the fire department.
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
DESA INTERNATIONAL
where not prohibited by state or local codes.
LO
PILOT
OFF
HI
Save this manual for future reference.
STANDARD OAK DESIGN
®
18", 24", and 30"
("A" Models) Thermostatically-Controlled
WARNING: Improper installation, adjustment,
alteration, service, or maintenance can cause
injury or property damage. Refer to this
manual for correct installation and opera-
tional procedures. For assistance or addi-
tional information consult a qualified installer,
service agency, or the gas supplier.
WARNING: This gas log set is for installa-
tion in a masonry solid fuel burning fire-
place, a U.L. listed manufactured solid fuel
burning fireplace or an AGA design certi-
fied vent-free firebox (including LogMate
FB32C and FB32NC) listed for use with
these gas log models.
WARNING: This is an unvented gas-fired
heater. It uses air (oxygen) from the room in
which it is installed. Provisions for adequate
combustion and ventilation air must be
provided. Refer to "Air for Combustion and
Ventilation" section in this manual.
LO
PILOT
OFF
HI
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Table of Contents
Related Manuals for Desa VS18NV
Summary of Contents for Desa VS18NV
- Page 1 DESA INTERNATIONAL UNVENTED (VENT-FREE) NATURAL GAS LOG HEATER Manually Control Models Also Designed Certified as Vented Decorative Appliance) This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohibited by state or local codes. * Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer OWNER’S OPERATION AND INSTALLATION MANUAL...
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Page 2: Table Of Contents
CONTENTS SECTION PAGE Safety Information ................... 2 Product Identification ................4 Local Codes ..................... 5 Unpacking ....................5 Product Features ..................5 Air for Combustion and Ventilation ............5 Installing ....................9 Check Gas Type ................9 Installation and Clearances (Vent-Free Operation Only) ....10 Installing Damper Clamp Accessory for Vented Operation .... - Page 3 WARNINGS Continued SAFETY WARNING ICON G 001 WARNING: Any change to this heater or its controls can be dangerous. INFORMATION 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. Continued 2.
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Page 4: Product Identification
PRODUCT Crossover Log Rear Log IDENTIFICATION Top Middle Log Left Front Branch Rear Piezo Burner Ignitor Front Bottom Burner Right Front Middle Branch Base Assembly Control Knob Figure 1 - Split Oak Design Model Front Log Crossover Log Rear Log Left Front Branch Rear Burner... -
Page 5: Local Codes
Install and use heater with care. Follow all local codes. In the absence of local LOCAL CODES codes, use the latest edition of The National Fuel Gas Code ANSI Z223, also known as NFPA 54*. *Available from: American National Standards Institute, Inc. 1430 Broadway New York, NY 10018 National Fire Protection Association, Inc. - Page 6 PROVIDING ADEQUATE VENTILATION AIR FOR The following is exerpts from National Fuel Gas Code. NFPA 54/ANSI Z223.1, COMBUSTION Section 5.3, Air for Combustion and Ventilation. All spaces in homes fall into one of the three following ventilation classifications: 1. Unusually Tight Construction; 2. Unconfined Space; 3. Confined Space. VENTILATION The information on pages 5 through 8 will help you classify your space and provide Continued...
- Page 7 DETERMINING AIR FLOW FOR HEATER LOCATION AIR FOR Determining if You Have a Confined or Unconfined Space COMBUSTION Use this work sheet to determine if you have a confined or unconfined space. Space: Includes the room in which you will install heater plus any adjoining rooms with VENTILATION doorless passageways or ventilation grills between the rooms.
- Page 8 AIR FOR WARNING WARNING ICON G 001 COMBUSTION If the area in which the heater may be operated is smaller than that defined as an unconfined space, provide adequate combus- tion and ventilation air by one of the methods described in the VENTILATION National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3.
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Page 9: Installing
INSTALLING NOTICE A qualified service person must install heater. Follow all local codes. NOTICE State or local codes may only allow operation of this appliance in a vented configuration. Check your state or local codes. WARNING WARNING ICON G 001 Before installing in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned of soot, creosote, ashes and loose paint by a qualified chimney cleaner. -
Page 10: Installation And Clearances (Vent-Free Operation Only)
INSTALLATION AND CLEARANCES (Vent-Free Operation Only) INSTALLING Continued WARNING Maintain the minimum clearances. If you can, provide greater clear- ances from floor, ceiling, and adjoining wall. MINIMUM FIREPLACE CLEARANCE TO COMBUSTIBLE MATERIALS Log Size Side Wall Ceiling Floor 18", 24", 30" 16"... - Page 11 INSTALLING NOTICE Manual control heaters may be used as a vented Continued product. If so, you must always run heater with chimney flue damper open. If running heater with damper open, noncombustible material above fireplace opening is not needed. Go to Installing Damper Clamp Accessory for Vented Operation, page 14.
- Page 12 Minimum Non Combustible Material Clearances INSTALLING If Using Mantel Continued You must have non combustible material(s) above the fireplace opening. Non combustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have non combustible material behind it. Non combustible material must extend at least 8 inches up (for all models).
- Page 13 Mantel Shelf INSTALLING 12" Underside of 10" Mantel Shelf Continued 8" 6" " All minimum distances are in inches Minimum Non- Combustible Log Sets Material 8" 12" 15" 18" 20" 18", 24", Min. & 30" Models Top of Fireplace Opening Hood Distances to (GA6050, GA6052)
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Page 14: Installing Damper Clamp Accessory For Vented Operation
INSTALLING DAMPER CLAMP ACCESSORY FOR INSTALLING VENTED OPERATION Continued Note: When used as a vented heater, appliance must be installed only in a solid- fuel burning fireplace with a working flue and constructed of non combustible material. If your heater is a manually controlled model, you may use this heater as a vented product. -
Page 15: Installing Heater Base Assembly
INSTALLING HEATER BASE ASSEMBLY INSTALLING WARNING Continued WARNING ICON G 001 You must secure this heater to fireplace floor. If not, heater will move when you adjust controls. Moving heater may cause a gas leak. WARNING WARNING ICON G 001 If installing in a sunken fireplace, special care is needed. - Page 16 INSTALLING Heater Gas Continued Regulator Flexible Gas Hose (if allowed by local codes) Figure 12 - Attaching Flexible Gas Hose to Heater Gas Regulator Masonry Screw Mounting Bracket Figure 13 - Attaching Mounting Brackets to Heater 102652...
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Page 17: Connecting To Gas Supply
CONNECTING TO GAS SUPPLY INSTALLING Continued NOTICE A qualified service person must connect heater to gas supply. Follow all local codes. Installation Items Needed Before installing heater, make sure you have the items listed below. • piping (check local codes) •... -
Page 18: Checking Gas Connections
INSTALLING CAUTION WARNING ICON G 001 Continued Avoid damage to regulator. Hold gas regulator with wrench when connecting it to gas piping and/or fittings. A.G.A. Design-Certified Manual Shutoff Valve From With 1/8" NPT Tap* Approved Flexible Gas Meter Gas Hose (if allowed (5"... - Page 19 Test Pressures Equal To or Less Than 1/2 PSIG INSTALLING 1. Close manual shutoff valve (see Figure 15). Continued 2. Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter. 3.
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Page 20: Installing Logs
INSTALLING LOGS (Standard Oak Design Models) INSTALLING Continued WARNING WARNING ICON G 001 Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury. Each log is marked with a number. - Page 21 INSTALLING LOGS (Split Oak Design Models) INSTALLING Continued WARNING Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury. Each log is marked with a number. These numbers will help you identify the log when installing.
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Page 22: Operating Heater (Thermostat-Controlled Models)
INSTALLING 4. Place the crossover log (#5) on the back log and the top middle log. Make sure the peg on the rear log is in the hole in the bottom of the crossover log. The crossover log should fit in the cutout of the top middle log (see Figure 25). Continued Crossover Log (#4) - Page 23 OPERATING LIGHTING INSTRUCTIONS HEATER WARNING WARNING ICON G 001 Thermostat- • If fireplace has glass doors, never operate this heater with glass doors closed. If you operate heater with doors closed, heat buildup inside Controlled Models fireplace will cause glass to burst. Also if fireplace opening has vents at the Continued bottom, you must open the vents before operating heater.
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Page 24: Operating Heater (Manually-Controlled Models)
OPERATING Ignitor Electrode Thermocouple Pilot Burner HEATER Thermostat- Controlled Models Continued Figure 27 - Pilot 8. Turn control knob counterclockwise to desired heating level. The burners C-clockwise should light. Set control knob to any heat level between HI and LO. CAUTION WARNING ICON G 001... - Page 25 OPERATING C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service HEATER technician or gas supplier. Force or attempted repair may result in a fire or explosion. D.
- Page 26 OPERATING 7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. HEATER • If control knob does not pop out when released, contact a qualified service Manually-Controlled person or gas supplier for repairs. Models Note: If pilot goes out, repeat steps 3 through 7.
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Page 27: Inspecting Burners
Check pilot flame pattern and burner flame patterns often. INSPECTING PILOT FLAME PATTERN BURNERS Figure 30 shows a correct pilot flame pattern. Figure 31 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. -
Page 28: Cleaning And Maintenance
CLEANING WARNING WARNING ICON G 001 Turn off heater and let cool before cleaning. MAINTENANCE CAUTION WARNING ICON G 001 You must keep control areas, burners, and circulating air passage- ways of heater clean. Inspect these areas of heater before each use. - Page 29 OBSERVED POSSIBLE TROUBLE- PROBLEM CAUSE REMEDY SHOOTING When ignitor button 1. Gas supply turned off or 1. Turn on gas supply or Continued is pressed, there is manual shutoff valve open manual shutoff spark at ODS/pilot closed valve but no ignition 2.
- Page 30 OBSERVED POSSIBLE TROUBLE- PROBLEM CAUSE REMEDY SHOOTING One or both burners 1. Inlet gas pressure is 1. Contact local natural gas Continued do not light after too low company ODS/pilot is lit 2. Burner orifice(s) 2. Clean burner(s) (see clogged Cleaning and Mainte- nance, page 28) or replace burner orifice(s)
- Page 31 TROUBLE- WARNING WARNING ICON G 001 SHOOTING If you smell gas • Shut off gas supply. Continued • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. •...
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Page 32: Optional Positioning Of Thermostat Sensing Bulb
If your log set cycles to pilot, but the room temperature drops to a lower than OPTIONAL ideal comfort level before the log set comes back on, you may want to POSITIONING reposition the thermostat sensing bulb. OF THERMOSTAT The thermostat sensing bulb is located on the gas valve assembly. This location allows the thermostat to keep the room temperature at an ideal comfort level for most fireplace SENSING BULB applications. - Page 33 Thermostat OPTIONAL Sensing Bulb POSITIONING OF THERMOSTAT Adhesive-backed Mounting Clip SENSING BULB For Masonry and Figure 37 - Locating Thermostat Sensing Bulb on Masonry Fireplace Factory-built Metal Fireplace If you have a factory-built metal fireplace, see Figure 38 for location. Continued Thermostat Sensing Bulb...
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Page 34: Technical Service
You may have further questions about installation, operation, or troubleshooting. TECHNICAL If so, contact DESA International’s Technical Service Department at SERVICE 1-800-DESA LOG (1-800-337-2564). 18" Thermostat- 24" Thermostat- 30" Thermostat- SPECIFICATIONS Controlled Controlled Controlled Btu (Variable) 16,000/26,000 20,000/33,000 21,500/36,000 Type Gas... -
Page 35: Replacement Parts
Usually, we will ask you to return the defective part to the factory. Parts Not Under Warranty Contact authorized dealers of this product. If they can’t supply original replace- ment part(s), call DESA International’s Parts Department at 1-800-972-7879 for referral information. When calling DESA International, have ready •... -
Page 36: Illustrated Parts Lists
ILLUSTRATED PARTS BREAK- DOWN Variable Manually- Controlled Models 27-1 27-2 VS18NV CFS18NV VS24NVA CFS24NVA VS30NVA CFS30NVA 102652... - Page 37 This list contains replaceable parts used in your heater. When ordering parts, follow PARTS LIST the instructions listed under Replacement Parts on page 35 of this manual. Variable Manually- Controlled Models PART NUMBER FOR VS18NV/CFS18NV VS24NVA/CFS24NVA VS30NVA/CFS30NVA DESCRIPTION QTY. — 102474-01 102474-03 Left Front Log (#1L)
- Page 38 ILLUSTRATED PARTS BREAK- DOWN Thermostat- Controlled Models 7-1 7-2 10-2 10-1 VL18NTA CF18NTA VL24NTA CF24NTA VL30NTA CF30NTA 102652...
- Page 39 This list contains replaceable parts used in your heater. When ordering parts, follow PARTS LIST the instructions listed under Replacement Parts on page 35 of this manual. Thermostat- Controlled Models PART NUMBER FOR VL18NTA/CF18NTA VL24NTA/CF24NTA VL30NTA/CF30NTA DESCRIPTION QTY. 101337-01 101337-02 101337-03 Rear Log (#1) 101336-01...
- Page 40 ILLUSTRATED PARTS BREAK- DOWN Thermostat- Controlled Models 7-1 7-2 10-2 10-1 VS18NTA CFS18NTA VS24NTA CFS24NTA VS30NTA CFS30NTA 102652...
- Page 41 This list contains replaceable parts used in your heater. When ordering parts, follow PARTS LIST the instructions listed under Replacement Parts on page 35 of this manual. Thermostat- Controlled Models PART NUMBER FOR VS18NTA/CFS18NTA VS24NTA/CFS24NTA VS30NTA/CFS30NTA DESCRIPTION QTY. — 102474-01 102474-03 Left Front Log (#1L) 102474-04...
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Page 44: Warranty Information
VENT-FREE NATURAL GAS LOG HEATERS DESA International warrants this product to be free from defects in materials and components for three (3) years and five (5) years on stainless steel burners from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.