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UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
Remote-Ready Models VUL18/24/30(N,P)R, HRB3930/3924(N,P)R
Thermostatically-Controlled Models VUL18/24/30(N,P)T and
Remote-Ready Models Also Design-Certified As
WARNING: If the information in this manual is not fol-
lowed 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
and CRB2618/3624/3630(N,P)R
HRB3624(N,P)T
Vented Decorative Appliances
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Related Manuals for Desa HRB3624
Summary of Contents for Desa HRB3624
- Page 1 • 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 HRB3624(N,P)T...
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Page 2: Table Of Contents
Safety Information ... 2 Product Identification ... 5 Local Codes... 5 Optional Remote Control Accessories ... 5 Unpacking... 5 Product Features ... 5 Air For Combustion and Ventilation ... 6 Installation ... 8 Operating Heater ... 20 Inspecting Burners... 25 Cleaning and Maintenance ... - Page 3 SAFETy INFORMATION Continued 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.
- Page 4 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) in- side any structure. Locate propane/LP supply tank(s) outdoors (propane/LP units only).
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Page 5: Product Identification
PRODUCT IDENTIFICATION Model CRB and HRB Series Logs Ignitor Control Knob Model VUL Series Logs Ignitor Control Knob Remote Flame Control Adjustment (Optional) Knob Figure 1 - Product Identification LOCAL CODES Install and use heater with care. Follow all local codes. -
Page 6: Air For Combustion And Ventilation
AIR FOR COMbUSTION AND VENTILATION WARNING: This heater shall not be installed in a confined space or unusually tight construc- tion unless provisions are provid- ed for adequate combustion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home. -
Page 7: Combustion And Ventilation Air
AIR FOR COMbUSTION AND VENTILATION Continued Space: Includes the room in which you will install fireplace plus any adjoining rooms with doorless pas- sageways or ventilation grills between the rooms. Determine the volume of the space (length x width x height). Length x Width x Height =__________cu. -
Page 8: Installation
AIR FOR COMbUSTION AND VENTILATION Continued Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent 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 INSTALLATION Continued CAUTION: This heater cre- ates warm air currents. These currents move heat to wall sur- faces next to heater. Installing heater next to vinyl or cloth wall coverings or operating heater where impurities (such as, but not limited to, tobacco smoke, aromatic candles, cleaning flu- ids, oil or kerosene lamps, etc.) in the air exist, may discolor walls...
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Page 10: Mantel Clearances
INSTALLATION Continued NOTICE: Manual control heaters may be used as a vented 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 12. - Page 11 INSTALLATION Continued NOTICE: Surface temperatures of adjacent walls and mantels be- come hot during operation. Walls and mantels above the firebox may become hot to the touch. If installed properly, these tem- peratures meet the requirement of the national product standard. Follow all minimum clearances shown in this manual.
- Page 12 INSTALLATION Continued INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION 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 noncombustible material. If your heater is a manually-controlled model, you may use this heater as a vented product.
- Page 13 INSTALLATION Continued IMPORTANT: Make sure the heater burners are level. If heater is not level, heater will not work properly. For thermostat models, avoid damage to thermostat bulb. Avoid nicks or sharp bends in thermostat bulb wire. Keep thermostat bulb in mounting bracket until ready to mount base to floor.
- Page 14 INSTALLATION Continued CONNECTING TO GAS SUPPLY WARNING: This appliance requires a 1/2" NPT (National Pipe Thread) inlet connection to the pressure regulator. WARNING: A qualified ser- vice person must connect heater to gas supply. Follow all local codes. CAUTION: Never connect propane/LP fireplace directly to the propane/LP supply.
- Page 15 INSTALLATION Continued Installation must include an equipment shutoff valve, union and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figures 15 or 16, depending on your model). IMPORTANT: Install equipment shutoff valve in an accessible location.
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Page 16: Checking Gas Connections
INSTALLATION Continued CHECKING GAS CONNECTIONS WARNING: Test all gas piping and connections, internal and external to unit, for leaks after installing or servicing. Correct all leaks at once. WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak detec- tion fluid to all joints. - Page 17 INSTALLATION Continued Equipment Propane/LP Shutoff Valve Supply Tank Figure 18 - Checking Gas Joints (Propane/LP Only) Equipment Shutoff Valve Gas Meter Figure 19 - Checking Gas Joints (Natural Gas Only) INSTALLING OPTIONAL REMOTE ACCESSORIES Installing Remote Receiver Remote control accessories are available sepa- rately (see Accessories, page 42).
- Page 18 INSTALLATION Continued 9. Connect wires to control valve at the TPTH and TH locations as shown in Figure 23. Note: Make sure excess wire does not inter- fere with burner or pilot. 10. If heater was removed from fireplace before installation of remote accessory, see Install- ing Heater Base Assembly on page 12 to rein- stall heater into fireplace.
- Page 19 INSTALLATION Continued 6. Place middle left log over front left and bottom logs as show in Figure 26. Be sure hole in middle left log seats over pin in front left log. Front Left Log Grate Prongs Base Assembly Figure 25 - Installing VUL Model Log Sets Note: Your appliance may vary from model shown but log placement will be the same.
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Page 20: Operating Heater
OPERATING HEATER THERMOSTAT-CONTROLLED MODELS 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 21 OPERATING HEATER Continued 5. Turn control knob counterclockwise to the PILOT position. Press in control knob for five (5) seconds (see Figure 28). Note: You may be running this heater for the first time after hooking up to gas sup- ply.
- Page 22 OPERATING HEATER Continued REMOTE-READy MODELS 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 23 OPERATING HEATER Continued 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, column 1, page 22. If you don’t smell gas, go to the next step. 6.
- Page 24 OPERATING HEATER Continued MANUAL LIGHTING PROCEDURE 1. Follow steps 1 through 6 under Lighting Instructions, pages 22 and 23. 2. Depress control knob and light pilot with match. 3. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob.
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Page 25: Inspecting Burners
OPERATING HEATER Continued Manual Mode 1. Press the POWER and LOCK buttons together to turn on the hand-held remote control. 2. Press the MANU button to turn on the fireplace. 3. Press the POWER and LOCK buttons together to turn off the fireplace. Auto (Thermostatic) Mode 1. -
Page 26: Cleaning And Maintenance
INSPECTING bURNERS Continued FRONT BURNER FLAME PATTERN Figure 38 shows correct front burner flame pat- tern. Figure 39 shows incorrect front burner flame pattern. The incorrect burner flame pattern shows yellow tipping at top of blue flame. WARNING: If yellow tipping occurs, your heater could pro- duce increased levels of carbon monoxide. -
Page 27: Wiring Diagram
CLEANING AND MAINTENANCE Continued 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. -
Page 28: 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 at ODS/pilot... - Page 29 OBSERVED PROBLEM ODS/pilot lights but flame goes out when control knob is released One or both burners do not light after ODS/pilot is lit Delayed ignition of one or both burners Burner backfiring during com- bustion Yellow flame in front burner during burner combustion 119426-01A TROUbLESHOOTING...
- Page 30 OBSERVED PROBLEM Slight smoke or odor during initial operation Heater produces a whistling noise when burners are lit White powder residue forming within burner box or on adjacent walls or furniture Moisture/condensation noticed on windows Remote does not function (Re- mote-Ready Models Only) Heater produces a clicking/tick- ing noise just after burners are...
- Page 31 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 32: Optional Positioning Of Thermostat Sensing Bulb
OPTIONAL POSITIONING OF THERMOSTAT SENSING bULb (Thermostat-Controlled Models Only) FOR MASONRY AND FACTORY- BUILT METAL FIREPLACE If your log set cycles to pilot, but the room tem- perature drops to a lower than ideal comfort level before the log set comes back on, you may want to reposition the thermostat sensing bulb. -
Page 33: Specifications
OPTIONAL POSITIONING OF THERMOSTAT SENSING bULb 4. The mounting clip must be a minimum of 3" from bottom of fireplace to prevent crimping of capillary. Once you have decided on a location, clean the area thoroughly. Remove the paper backing from the adhesive on back of mounting clip. -
Page 34: Illustrated Parts Breakdown And Parts List
ILLUSTRATED PARTS bREAkDOWN AND PARTS LIST LOG MODELS VUL18NT, VUL18PT, VUL24NT, VUL24PT, VUL30NT, VUL30PT, VUL18NR, VUL18PR, VUL24NR, VUL24PR, VUL30NR AND VUL30PR This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 42 of this manual. PART NUMBER VUL18NT VUL24NT... - Page 35 ILLUSTRATED PARTS bREAkDOWN AND PARTS LIST LOG MODELS CRB2618NR, CRB2618PR, CRB3624NR, CRB3624PR, CRB3630NR, CRB3630PR, HRB3624NT, HRB3624PT, HRB3624NR AND HRB3624PR This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 42 of this manual. PART NUMBER HRB3624NT HRB3624PT...
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Page 36: Illustrated Parts Breakdown
ILLUSTRATED PARTS bREAkDOWN THERMOSTAT-CONTROLLED MODELS VUL18NT, VUL18PT, VUL24NT, VUL24PT, VUL30NT, VUL30PT, HRB3624NT AND HRB3624PT www.desatech.com 119426-01A... -
Page 37: Parts List
THERMOSTAT-CONTROLLED MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 42 of this manual. NO. PART NO. DESCRIPTION Ramp Burner Base 111435-01 Electronic Ignitor 112465-01 Ramp Front Burner 112465-02 Ramp Front Burner 113242-01 Ramp Back Burner Kit 113242-02 Ramp Back Burner Kit... - Page 38 ILLUSTRATED PARTS bREAkDOWN REMOTE-READY VARIABLE CONTROL MODELS VUL18NR, VUL18PR, VUL24NR, VUL24PR, VUL30NR, VUL30PR www.desatech.com 119426-01A...
- Page 39 REMOTE-READY VARIABLE CONTROL MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 42 of this manual. NO. PART NO. 111435-01 Electronic Ignitor 112465-01 Ramp Front Burner 112465-02 Ramp Front Burner 113242-01 Ramp Back Burner Kit 113242-02 Ramp Back Burner Kit 103779-01 O.D.S.
- Page 40 ILLUSTRATED PARTS bREAkDOWN REMOTE-READY VARIABLE CONTROL MODELS CRB2618NR, CRB2618PR, CRB3624NR, CRB3624PR, CRB3630NR, CRB3630PR, HRB3624NR AND HRB3624PR www.desatech.com 119426-01A...
- Page 41 REMOTE-READY VARIABLE CONTROL MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 42 of this manual. NO. PART NO. DESCRIPTION Ramp Burner Assembly 111435-01 Electronic Ignitor 112465-01 Ramp Front Burner 112465-02 Ramp Front Burner 113242-01 Ramp Back Burner Kit 113242-02 Ramp Back Burner Kit...
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Page 42: Service Hints
Heating Products’ Technical Service Department at 1-866-672-6040. When calling please have your model and serial numbers of your heater ready. You can also visit DESA Heating Products’ techni- cal services web site at www.desatech.com. REPLACEMENT PARTS Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty. - Page 43 ACCESSORIES Continued RECEIVER AND HAND-HELD THERMOSTAT REMOTE CONTROL KIT - HRC200 For all Remote-Ready Models. Allows the fire- place to be operated in a manually or thermostati- cally controlled mode. You can turn the fireplace on and off without ever leaving the comfort of your easy chair.
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Page 44: Warranty Information
VENT-FREE GAS LOG HEATERS DESA Heating Products warrants this product to be free from defects in materials and components for four (4) years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.