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UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
18" AND 24" VARIAbLE MANUALLy-CONTROLLED
MODELS VyS18NC, VyS18PC, VyS24NC AND VyS24PC
Also Design-Certified as Vented Decorative Appliance
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 performed by a quali-
fied installer, service agency or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
For more information, visit www.desatech.com
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Summary of Contents for Desa VyS18PC
- Page 1 UNVENTED (VENT-FREE) GAS LOG HEATER OWNER’S OPERATION AND INSTALLATION MANUAL 18" AND 24" VARIAbLE MANUALLy-CONTROLLED MODELS VyS18NC, VyS18PC, VyS24NC AND VyS24PC Also Design-Certified as Vented Decorative Appliance 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.
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Page 2: Table Of Contents
Safety ... 2 Product Identification ... 4 Local Codes... 5 Unpacking... 5 Product Features ... 5 Air For Combustion and Ventilation ... 5 Installation ... 8 Operation ... 17 Inspecting Burners... 19 Cleaning and Maintenance ... 19 WARNING: Improper installation, adjustment, alteration, service or main- tenance can cause injury or property damage. - Page 3 WARNING: This product con- tains and/or generates chemicals known to the State of California to cause cancer or birth defects or other reproductive harm. IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, op- erate or service this fireplace. Improper use of this fireplace can cause serious injury or death from burns, fire, explo-...
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Page 4: Product Identification
2. Do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outdoors (propane/LP units only). 3. To prevent performance problems, the use of a propane/LP tank of less than 100 lbs. capacity is not recommended (propane/LP units only). 4. -
Page 5: Local Codes
Always handle base assembly by grate. 2. Remove all protective packaging applied to log and heater for shipment. 3. Check heater for any shipping damage. If heater is damaged call DESA Heating, LLC at 1-866-672-6040 for replacement parts before returning to dealer. PRODUCT FEATURES heaters. -
Page 6: Providing Adequate Ventilation
AIR FOR COMbUSTION AND VENTILATION Exhaust fans, fireplaces, clothes dryers and fuel burning appliances draw air from the house to operate. You must provide adequate fresh air for these appliances. This will insure proper venting of vented fuel-burning appli- ances. PROVIDING ADEQUATE VENTILATION The following are excerpts from National Fuel... -
Page 7: Ventilation Air
AIR FOR COMbUSTION AND VENTILATION Example: Gas water heater Vent-free fireplace + _________ Btu/Hr Total = _________ Btu/Hr 4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used. _______ Btu/Hr (maximum the space can support) _______ Btu/Hr (actual amount of Btu/Hr used) -
Page 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 while using heater. -
Page 9: Installation And Clearances
INSTALLATION AND CLEARANCES (Vent-Free Operation Only) WARNING: Maintain the minimum clearances. If you can, provide greater clearances from floor, ceiling and adjoining wall. Minimum Fireplace Clearance to Combustible Materials Side Wall 16", Ceiling 42", Front 36" Minimum Firebox Size Height 17", Depth 14", Front Width 24", Rear Width 20"... -
Page 10: Mantel Clearances
IMPORTANT: If you cannot meet these mini- mum clearances, you must operate heater with chimney flue damper open. Go to Install- ing Damper Clamp Accessory for Vented Operation, page 11. If Using Mantel You must have noncombustible material(s) above the fireplace opening. Noncombustible materials (such as slate, marble, tile, etc.) must be at least 1/2"... -
Page 11: Floor Clearances
FLOOR CLEARANCES A. If installing appliance on floor level, you must maintain the minimum distance of 14" to combustibles (see Figure 7). B. If combustible materials are less than 14" to fireplace, you must install appliance at least 5" above combustible flooring (see Figure 8). -
Page 12: Safety Information
INSTALLING HEATER BASE ASSEMBLY CAUTION: Do not remove the data plates attached to the heater base assembly. The data plates contain important warranty and safety information. WARNING: You must secure this heater to fireplace floor. If not, heater will move when you adjust controls. -
Page 13: Connecting To Gas Supply
CONNECTING TO GAS SUPPLY WARNING: This appliance requires a 1/2" NPT (National Pipe Thread) inlet connection to the pressure regulator. WARNING: A qualified service person must connect heater to gas supply. Follow all local codes. CAUTION: Never connect propane/LP heater directly to the propane/LP supply. -
Page 14: Checking Gas Connections
We recommend that you install sediment trap in supply line as shown in Figure 13. 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 sediment trap traps moisture and contami- nants. -
Page 15: Installing Logs
3. Check all joints from gas meter (natural gas) or propane/LP supply to equipment shutoff valve (see Figure 15 or 16). Apply a commercial leak detection solution to all joints. Bubbles forming show a leak. 4. Correct all leaks at once. Propane/LP Equipment Shutoff Valve Supply Tank... - Page 16 3. Place rear log on heater base behind the metal burner. The bottom of the rear log has recess areas on the left and right side for the base to set into. Pull the rear log forward until it touches the front log (see Figure 17, page 15).
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Page 17: Operation
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. -
Page 18: To Turn Off Gas To Appliance
1. STOP! Read the safety information in column 1. 2. Make sure equipment shutoff valve is fully open. 3. Press in and turn control knob clockwise to the OFF position. 4. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. -
Page 19: Inspecting Burners
Check pilot flame pattern and burner flame patterns often. PILOT FLAME PATTERN Figure 23 shows a correct pilot flame pattern. Figure 24 shows an incorrect pilot flame pat- tern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. - Page 20 CLEANING AND MAINTENANCE We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt. To clean these parts we recommend using compressed air no greater than 30 PSI. Your local computer store, hardware store or home center may carry compressed air in a can.
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Page 21: Troubleshooting
WARNING: Turn off and unplug 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 items are listed in order of operation. OBSERVED PROBLEM When control knob is pressed in and turned to PILOT, there... - Page 22 OBSERVED PROBLEM ODS/pilot lights but flame goes out when control knob is released Burner does not light after ODS/pilot is lit Delayed ignition of burner Burner backfiring during com- bustion TROUbLESHOOTING Continued POSSIBLE CAUSE 1. Control knob not fully pressed in 2.
- Page 23 OBSERVED PROBLEM Slight smoke or odor during initial operation Moisture/condensation no- ticed on windows Heater produces a whistling noise when burner is lit White powder residue forming within burner box or on adja- cent walls or furniture Heater produces a clicking/ ticking noise just after burner is lit or shut off 124452-01A...
- Page 24 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 supplier’s instructions.
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Page 25: Specifications
Contact authorized dealers of this product. If they can’t supply original replacement part(s), contact your nearest Parts Central (see page 28) or call DESA Heating, LLC at 1-866-672-6040 for referral information. A list of authorized dealers can be found by visiting www.deaint.com. -
Page 26: Parts
PARTS VARIABLE MANUALLY-CONTROLLED VYS18NC, VYS18PC, VYS24NC AND VYS24PC 17-3 17-4 (18" Models) 17-2 17-4 (24" Models) 17-5 17-1 www.desatech.com 124452-01A... - Page 27 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. PART NO. 120804-01PP Log Base 120783-01 120517-04PP Pilot Bracket 122862-01 120630-04 120630-02 120517-02 099415-23 099415-24 122142-01 122142-02 122141-01...
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Page 28: Accessories
Purchase these fireplace accessories from your local dealer. If they can not supply these accessories, either contact your nearest Parts Central or call DESA Heating, LLC at 1-866-672-6040 for information. You can also write to the address listed on the back page of this manual. - Page 29 _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ 124452-01A NOTES www.desatech.com...
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Page 32: Warranty
This is DESA Heating, LLC’s exclusive warranty, and to the full extent allowed by law; this express warranty excludes any and all other warranties, express or implied, written or verbal and limits the duration of any and all implied warranties, including warranties of merchantability and fitness for a particular purpose to one (1) year on new products and 30 days on factory reconditioned products from the date of first purchase.
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