UNVENTED (VENT-FREE) GAS COMPACT CLASSIC HEARTH® FIREPLACE OWNER’S OPERATION AND INSTALLATION MANUAL Shown with optional cabinet mantel/hearth base accessory. REMOTE-READY MODELS: VMH26PRB, VMH26NRB, EFS26NRA, EFS26PRA 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.
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual for correct installation and operational procedures. For assistance or additional information consult a qualified installer, service agency, or the gas supplier. 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.
SAFETY INFORMATION WARNING: This product contains 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, operate, or service this fireplace. Improper use of this fireplace can cause serious injury or death from burns, fire, explosion, electrical shock, and carbon monoxide poisoning.
SAFETY INFORMATION Continued 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. 2. Do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outdoors. 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.
OPTIONAL REMOTE CONTROL ACCESSORIES There are four optional remote controls that can be purchased separately: • wall switch • hand-held ON/OFF remote • wall thermostat • hand-held thermostat remote See Accessories, pages 36 and 37. LOCAL CODES Install and use fireplace with care. Follow all local codes. In the absence of local codes, use the latest edition of The National Fuel Gas Code ANSI Z223.1/NFPA 54*. *Available from: American National Standards Institute, Inc.
ASSEMBLY AIR FOR COMBUSTION AND VENTILATION Continued 4. Locate four black phillips sheet metal screws from the hardware packet. 5. Rotate hood as shown in Figure 3. Make sure hood tabs point toward fireplace. 6. Insert hood tabs between baffle and louvers (see Figure 3). 7. Gently rotate hood to upright position. Make sure hood tabs are behind louvers and hood is resting on firebox top (see Figure 3). 8. Align screw holes on hood with screw holes on firebox top. 9. Insert screws as shown in Figure 3.
AIR FOR COMBUSTION AND VENTILATION Continued Unusually tight construction is defined as construction where: a. walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of one perm (6 x 10-11 kg per pa-sec-m2) or less with openings gasketed or sealed and b. weather stripping has been added on openable windows and doors and c.
AIR FOR COMBUSTION AND VENTILATION 12" Continued The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows: A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From Inside Building. B.
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 primary heat source. If you have a central heating system, you may run system’s circulating blower while using heater. This will help circulate the heat throughout the house. In the event of a power outage, you can use this heater as your primary heat source. WARNING: A qualified service person must install fireplace. Follow all local codes.
INSTALLATION Continued FIREPLACE CLEARANCES WARNING: Maintain the minimum clearances shown in Figure 6. If you can, provide greater clearances from floor, ceiling, and joining wall. If your fireplace is to be used with an optional mantel, the installation instructions included with your mantel shows an CSA approved method of attaching the fireplace/mantel system to a wall. IMPORTANT: Only use optional cabinet or corner mantels specified in this manual.
INSTALLATION Continued 2. If installing GA3450T blower accessory, do so at this time. Follow instructions included with blower accessory. Note: If not installing blower accessory, you may wish to run electrical wiring to your fireplace for future blower installation (see Accessories, pages 36 and 37). Use only approved three-wire electrical wiring. Note: A qualified installer should make all electrical connections. WARNING: If pre-wiring, do not connect wiring to any electrical source at this time.
INSTALLATION Continued WARNING: Do not allow noncombustible materials to cover any necessary openings like louvered slots. WARNING: Never modify or cover the louvered slots on the front of the firebox. WARNING: Use only noncombustible mortar or adhesives when overlapping the front facing with noncombustible facing material. Mantel Clearances for Built-In Installation If placing mantel above built-in fireplace, you must meet minimum clearance between mantel shelf and top of fireplace opening.
INSTALLATION Continued 11. Cut an access hole in base to run flexible gas line to fireplace (see Figure 12). Make sure to locate access hole so mantel will cover it when installed. Note: You can secure base to floor using wood screws. Countersink screw heads and putty over. 12. Install gas line. See Connecting To Gas Supply, pages 16 and 17. 13. Check for leaks. See Checking Gas Connections, pages 17 and 18. 14. Place mantel around fireplace. Be careful not to damage wall or mantel. 15.
INSTALLATION Continued Installing Blower Accessory CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. CAUTION: Verify proper operation after servicing. Note: If you are using a mantel with your fireplace, use the following instructions. If your fireplace is built-in, see For Built-In Installation, page 15. 1. Install snap bushings found in hardware kit into both holes in rear of valve cover shield. 2.
INSTALLATION Continued 8. Reconnect red wire to switch position 3. Reconnect blue wire to switch position 1. Reconnect green and white wires. 9. Install the switch plate on the valve cover shield with 2 #10 screws provided (see Figure 17). Route power cord out of the cabinet by inserting it through the bushing on the outer casing (see Figure 15, page 14). Plug fan kit into 120Volt grounded power supply and test operation.
INSTALLATION Continued CONNECTING TO GAS SUPPLY WARNING: This appliance requires a 45° male flare fitting 5/8"18 UNF (Unified National Fine Thread) inlet connection and the flexible gas line provided. WARNING: A qualified service person must connect fireplace to gas supply. Follow all local codes. WARNING: Never connect natural gas fireplace to private (non-utility) gas wells. This gas is commonly known as wellhead gas.
INSTALLATION CONNECTING FIREPLACE TO GAS SUPPLY Continued We recommend that you install a sediment trap in supply line as shown in Figure 21. 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 contaminants. This keeps them from going into fireplace controls.
INSTALLATION Continued Test Pressures In Excess Of 1/2 PSIG (3.5 kPa) 4. Check all gas connections for leaks. See Checking Gas Connections. 5. Replace branch support back into fireplace. Feed flexible gas line into fireplace base area while replacing branch support. Make sure the entire flexible gas line is in fireplace base area. Reattach branch support to fireplace with screws removed in step 1, page 17.
INSTALLATION Continued Equipment Shutoff Valve Propane/LP Supply Tank Gas Control Valve Figure 25 - Checking Gas Joints (Propane/LP Only) Equipment Shutoff Valve Gas Meter OPTIONAL WIRELESS HAND-HELD REMOTE CONTROL ACCESSORIES (GHRCB Series & GHRCTB Series) Installing Receiver 1. Remove screws. 2. Disconnect switch wires from the control valve. 3. Remove switch plate (see Figure 27). Discard switch plate after removing. Save the screws. 4.
INSTALLATION OPTIONAL WALL MOUNTED THERMOSTAT - GWMT1 Continued Remote Receiver Red Wire WARNING: Read and follow installation instructions. Installation should be done by a qualified installer familiar with lowvoltage wiring procedures. Black Wire WARNING: Do not connect this thermostat to any electrical source! Electrical shock and/or fire hazard will occur.
INSTALLATION Continued 6. Connect one bare wire end to each terminal (“W” and “R”) of the thermostat base (see Figure 34). 7. Install the base onto the wall with the provided screws. 8. Move the temperature adjustment back and forth to insure the bimetal is free from restrictions. 9. Replace the cover onto the base. (Upon installation, the thermostat must be allowed to stabilize at room temperature for a minimum of 30 minutes for proper operation). 10. Set switch on fireplace to Auto position. 11.
WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance.
OPERATING FIREPLACE TO TURN OFF GAS TO APPLIANCE Continued 8. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. • If control knob does not pop out when released, contact a qualified service person or gas supplier for repairs. Note: If pilot goes out, repeat steps 4 through 8. 9. Slightly push in and turn control knob counterclockwise to the ON position. 10. Wait one minute and switch selector switch to the ON position to light burner. 11.
OPERATING FIREPLACE Continued Selector Switch in REMOTE Position (Optional Hand-Held Remote Control) T ON LO PILO FF Control Knob O REMOTE OFF ON HI Flame Adjustment Knob Figure 39 - Setting the Selector Switch, Control Knob, and Flame Adjustment Knob for Hand-Held Remote Operation ON/OFF SERIES (MODEL GHRCB) Hold the control button on the hand-held remote until burner turns on. Hold the control button again until burner turns off (see Figure 40).
OPERATING FIREPLACE Continued Key Pad Lock Feature This feature allows the user to lock/unlock the keypad on the hand-held remote in the MANU or AUTO mode to prevent inadvertent operation (i.e. children operating the hand-held remote control, etc.). The keypad is locked in either on or off. Press the POWER and LOCK buttons together to turn the unit on or off.
INSPECTING BURNERS Continued BURNER FLAME PATTERN Figure 45 shows a correct burner flame pattern. Figure 46 shows an incorrect burner flame pattern. The incorrect burner flame pattern shows sporadic, irregular flame tipping. The flame should not be dark or have an orange/reddish tinge. Note: When using the fireplace the first time, the flame will be orange for approximately one hour until the log cures.
CLEANING AND MAINTENANCE Continued 3. Blow air through the ports/slots and holes in the burner. 4. Check the injector holder located at the end of the burner tube again. Remove any large particles of dust, dirt, lint, or pet hair with a soft cloth or vacuum cleaner nozzle. 5. Blow air into the primary air holes on the injector holder. 6. In case any large clumps of dust have now been pushed into the burner repeat steps 3 and 4. Clean the pilot assembly also.
TROUBLESHOOTING WARNING: Turn off and unplug fireplace and let cool before servicing. Only a qualified service person should service and repair fireplace. 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 POSSIBLE CAUSE REMEDY When ignitor button is pressed, 1. Ignitor electrode not con- 1.
TROUBLESHOOTING OBSERVED PROBLEM Continued POSSIBLE CAUSE REMEDY ODS/pilot lights but flame goes 1. Control knob not fully 1. Press in control knob fully out when control knob is released pressed in 2. Control knob not pressed in 2. After ODS/pilot lights, keep conlong enough trol knob pressed in 30 seconds 3. Safety interlock system has 3. Wait one minute for safety inbeen triggered terlock system to reset. Repeat ignition operation 4. Equipment shutoff valve not 4.
TROUBLESHOOTING OBSERVED PROBLEM Continued POSSIBLE CAUSE Slight smoke or odor during ini- 1. Residues from manufacturtial operation ing processes and log curing 2. Not enough air 3. Gas regulator defective Fireplace produces a whistling 1. Turning control knob to HI noise when burner is lit position when burner is cold 2. Air in gas line 3. Air passageways on fireplace blocked 4. Dirty or partially clogged burner orifice REMEDY 1. Problem will stop after a few hours of operation 2.
TROUBLESHOOTING Continued 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. Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the fire department. IMPORTANT: Operating fireplace where impurities in air exist may create odors.
SPECIFICATIONS Remote-Ready Models VMH26PRB, EFS26PRA 14,000/26,000 Propane/LP Gas Only Piezo 8" W.C. Btu/Hr Type Gas Ignition Manifold Pressure Inlet Gas Pressure (in. of water) Maximum 14" Minimum* 11" Dimensions, inches (HxWxD) Fireplace 25 7/8 x 26 13/16 x 9 3/8 (including hood and screws) Carton 32 5/8 x 27 13/16 x 11 5/8 Weight, pounds Fireplace 44 1/2 lbs. Shipping 48 lbs. * For purpose of input adjustment 32 www.desatech.
REPLACEMENT PARTS SERVICE HINTS Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty. When Gas Pressure Is Too Low • pilot will not stay lit • burners will have delayed ignition • fireplace will not produce specified heat • for propane/LP units, propane/LP gas supply may be low You may feel your gas pressure is too low. If so, contact your local natural or propane/LP gas supplier.
ILLUSTRATED PARTS BREAKDOWN REMOTE-READY MODELS VMH26PRB, VMH26NRB (Shown), EFS26PRA, EFS26NRA 3 1 6 23 8 7 20 20 35 4 9 20 20 7 10 3 25 16 18 4 15 2 20 22 39 37 12 24 38 27 40 29 26 31 33 36 14 34 8 30 5 32 18 43 31 19 21 11 41 28 44 17 13 34 42 www.desatech.
PARTS LIST REMOTE-READY MODELS This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 33 of this manual. KEY NO.
ACCESSORIES NOTICE: All accessories may not be available for all fireplace models. Purchase these fireplace accessories from your local dealer. If they can not supply these accessories, call DESA Heating Products at 1-866-672-6040 for referral information. You can also write to the address listed on the back page of this manual. THERMOSTAT-CONTROLLED BLOWER KIT - GA3450T For all models. Provides better heat distribution. Makes fireplace more efficient. Automatically turns off and on as needed.
ACCESSORIES Continued RECEIVER AND HAND-HELD THERMOSTAT REMOTE CONTROL KIT - GHRCTB CABINET MANTEL AND FULL HEARTH BASE For all models. Allows the fireplace to be operated in a manually or thermostatically controlled mode. You can turn the fireplace on and off without ever leaving the comfort of your easy chair. GMC80F Series - Oak Finished GMC81U Series - Unfinished Birch GMC82F Series - Cherry Finished Birch For all models. Mantel features columns, moldings, fluting and medallion.
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WARRANTY INFORMATION KEEP THIS WARRANTY Model ____________________________ Serial No. _________________________ Date Purchased ____________________ Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty. We make no other warranty, expressed or implied.