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Desa GA3700 Owner's Operation And Installation Manual

Unvented (vent-free) gas fireplace
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UNVENTED (VENT-FREE) GAS FIREPLACE
OWNER'S OPERATION AND INSTALLATION MANUAL
Shown with
optional cabinet
mantel with hearth
base and trim
accessories.
REMOTE-READY GAS FIREPLACE SYSTEMS
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.
VYGF33PRC AND VYGF33NRC
For more information, visit www.desatech.com
Patent Pending

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Summary of Contents for Desa GA3700

  • Page 1 UNVENTED (VENT-FREE) GAS FIREPLACE OWNER’S OPERATION AND INSTALLATION MANUAL Shown with optional cabinet mantel with hearth base and trim accessories. REMOTE-READY GAS FIREPLACE SYSTEMS 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.

  • Page 2: Table Of Contents

    Safety ... 2 Product Identification ... 4 Local Codes... 5 Unpacking... 5 Product Features ... 5 Air For Combustion And Ventilation ... 6 Installation ... 8 Operation ... 19 Inspecting Burner ... 23 Cleaning and Maintenance ... 24 WARNING: Improper installation, adjustment, alteration, service or maintenance can cause...
  • Page 3 DANGER: Carbon monoxide poisoning may lead to death! Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness or nausea. If you have these signs, the fireplace may not be working properly. Get fresh air at once! Have fireplace serviced.

  • Page 4: Product Identification

    3. 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.

  • Page 5: Local Codes

    This fireplace accepts an optional blower as- sembly (not included). The GA3700T Series blower operates thermostatically and features a variable speed control. The GA3700 Series blower operates manually and also features a variable speed control. The blower circulates heated air from the fireplace into the room.

  • Page 6: Air For Combustion And Ventilation

    AIR FOR COMbUSTION AND VENTILATION WARNING: This heater shall not be installed in a room or space unless the required vol- ume of indoor combustion air is provided by the method de- scribed in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, the International Fuel Gas Code, or applicable local codes.
  • Page 7 AIR FOR COMbUSTION AND VENTILATION 1. Determine the volume of the space (length x width x height). Length x Width x Height =__________cu. ft. (volume of space) Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space) If additional ventilation to adjoining room is supplied with grills or openings, add the...

  • Page 8: Installation

    AIR FOR COMbUSTION AND VENTILATION ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts. You must provide two perma- nent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors.

  • Page 9: Electrical Hookup

    Gas type is indicated on the rat- ing plate. Field conversion is not permitted. ELECTRICAL HOOKUP (Models GA3700 Series and GA3700T Series Blower Accessories and GA3555 Internal Duplex Kit) This fireplace accepts a blower assembly with an electrical cord. The electrical cord is five feet in length.

  • Page 10: Conventional Fireplace Installation

    7. Repeat steps 1 through 6, page 9, for other side. 8. Tighten trim hanging screws (#10 x 6.25 shoulder) into holes in cabinets. Place the assembled trim onto fireplace cabinet. Align hanging notches on trim with hang- ing screws on side of fireplace (see Figure 7).
  • Page 11 3. Install gas piping to fireplace location. This installation includes an approved flexible gas line (if allowed by local codes) after the equipment shutoff valve. The flexible gas line must be the last item installed on the gas piping. See Installing Gas Piping to Fireplace Location, page 13.
  • Page 12 BUILT-IN FIREpLACE INSTALLATION Built-in installation of this fireplace involves installing fireplace into a framed-in enclosure. This makes the front of fireplace flush with wall. If installing a mantel above the fireplace, you must follow the clearances shown in Fig- ure 16, page 13. Follow the instructions below to install the fireplace in this manner.
  • Page 13 Mantel Clearances for Built-In Installation If placing mantel above built-in fireplace, you must meet minimum clearance between man- tel shelf and top of fireplace opening. NOTICE: If your installation does not meet the minimum clear- ances shown, you must do one of the following: •...
  • Page 14 For propane/LP units, the installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between 11" and 14" of water. If you do not re- duce incoming gas pressure, heater regulator damage could occur.
  • Page 15 CONNECTING FIREpLACE TO GAS SUppLY Installation Items Needed • 5/16" hex socket wrench or nut-driver • Phillips screwdriver • sealant (resistant to propane/LP gas, not provided) 1. Remove fireplace screen. Remove two screws that hold fireplace screen in place for shipping. These screws are located near top of screen.
  • Page 16 CAUTION: Make sure exter- nal regulator has been installed between propane/LP supply and fireplace. See guidelines under Connecting Fireplace to Gas Supply, page 15. pRESSURE TESTING GAS SUppLY pIpING SYSTEM Test Pressures In Excess Of 1/2 PSIG (3.5 kPa) 1. Disconnect fireplace with its appliance main gas valve (control valve) and equip- ment shutoff valve from gas supply piping system.

  • Page 17: Safety Information

    5. Correct all leaks at once. 6. Light fireplace (see Operation, page 19. Check all other internal joints for leaks. 7. Turn off fireplace (see To Turn Off Gas to Appliance, page 20). INSTALLING LOGS CAUTION: Do not remove the data plates attached to the heater base assembly.
  • Page 18 Notches Screws for Mounting Screen Figure 26 - Installing Fireplace Screen OpTIONAL WIRELESS HAND-HELD REMOTE CONTROL ACCESSORIES (HRC100 and HRC200) Installing Remote Receiver Unit 1. Disconnect switch wires from the con- trol valve. 2. Remove screws attaching switch plate. 3. Remove switch plate (see Figure 27). Discard after removing.

  • Page 19: Operation

    Installing 9-Volt Battery in Hand-Held Remote Control Unit 1. Remove battery cover on back of remote control unit. 2. Attach terminal wires to the battery. Place battery into the battery housing. 3. Replace battery cover onto remote con- trol unit. FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not fol-...
  • Page 20 4. Press in and turn control knob clockwise to the OFF position. 5. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Follow “B” in the safety information, page 19. If you don’t smell gas, go to the next step.
  • Page 21 MANUAL LIGHTING pROCEDURE 1. Follow steps 1 through 6 under Lighting Instructions, page 19. 2. Press control knob and light pilot with match. 3. Keep control knob pressed in for 30 sec- onds after lighting pilot. After 30 seconds, release control knob. Now follow steps 9 through 11 under Lighting Instructions, page 20.

  • Page 22: Optional Blower

    ON/OFF switch. The blower will start when the thermostat senses a sufficient increase in firebox temperature. The GA3700 series vari- able speed blower also has an ON/OFF switch built into the variable speed control.

  • Page 23: Inspecting Burner

    Check pilot flame pattern and burner flame patterns often. pILOT FLAME pATTERN Figure 38 shows a correct pilot flame pattern. Figure 39 shows an incorrect pilot flame pat- tern. The incorrect pilot flame is not properly heating the thermocouple. When the thermo- couple cools, the heater will shut down.

  • Page 24: Cleaning And Maintenance

    CLEANING AND MAINTENANCE WARNING: Turn off fireplace and let cool before cleaning. CAUTION: You must keep control areas, burner and cir- culating air passageways of fireplace clean. Inspect these areas of fireplace before each use. Have fireplace inspected yearly by a qualified service person.

  • Page 25: 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 items are listed in order of operation. OBSERvED pROBLEM When ignitor button is pressed, there is no spark...
  • Page 26 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 one or both burners Burner backfiring during combustion Slight smoke or odor during initial operation TROUbLEShOOTING Continued pOSSIBLE CAUSE 1.
  • Page 27 OBSERvED pROBLEM Moisture/condensation no- ticed on windows Heater produces a whistling noise when burners are lit White powder residue form- ing within burner box or on adjacent walls or furniture Remote does not function Fireplace produces a click- ing/ticking noise just after burner is lit or shut off 113109-01G TROUbLEShOOTING...
  • Page 28 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.

  • Page 29: Wiring Diagram

    DESA Heating, LLC at 1-866-672-6040. When calling, please have your model and serial numbers of your heater ready. You can also visit DESA Heating, LLC’s web site at www.desatech.com. When Gas pressure Is Too Low • pilot will not stay lit •...

  • Page 30: Parts

    MODELS VYGF33PRC AND VYGF33NRC (SHOWN) PARTS www.desatech.com 113109-01G...
  • Page 31 This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 29 of this manual. PART NO. 122081-04 122081-05 122081-06 103778-01 103779-01 098249-01 099387-09 100609-01 104229-02 104229-01 111124 -01 099056-19 099056-26 102772-01 M11084-38...
  • Page 32 PARTS FIREBOx MODELS VYGF33PRC AND VYGF33NRC www.desatech.com 113109-01G...
  • Page 33 FIREBOx MODELS VYGF33PRC AND VYGF33NRC This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 29 of this manual. NO. PART NO. 101357-03 098304-01 104239-01CK Top Front Louver 101712-03 099230-02 101346-01 101514-01ck...

  • Page 34: Accessories

    Purchase these fireplace accessories from your local dealer. If they can not supply these accessories, 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 35 WALL-MOUNT ON/OFF SWITCH GWMS2 For all models. Allows the gas log heater to be turned on and off with a wall switch. FIRE CRACKLE - CF6-A For all models. Creates the sound of a real burning fire. 113109-01G ACCESSORIES Continued MANTELS W32TU - 32"...

  • Page 36: 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 four (4) years on new products and 30 days on factory reconditioned products from the date of first purchase.

This manual is also suitable for:

Ga3555Ga3700tHrc100Hrc200Vygf33prcVygf33nrc

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