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 and CRB2618/3624/3630(N,P)R Thermostatically-Controlled Models VUL18/24/30(N,P)T and HRB3624(N,P)T Remote-Ready Models Also Design-Certified As Vented Decorative Appliances 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.
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.................
SAFETY INFORMATION Continued 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 (propane/LP units only). 3.
Product Identification Model CRB and HRB Series Logs State of Massachusetts: The installation must be made by a licensed plumber or gas fitter in the Commonwealth of Massachusetts. Sellers of unvented propane or natural gas-fired supplemental room heaters shall provide to each purchaser a copy of 527 CMR 30 upon sale of the unit. Vent-free gas products are prohibited for bedroom and bathroom installation in the Commonwealth of Massachusetts.
Air For Combustion and Ventilation WARNING: This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided 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. Today’s homes are built more energy efficient than ever. New materials, increased insulation and new construction methods help reduce heat loss in homes.
AIR FOR COMBUSTION AND VENTILATION Continued Space: Includes the room in which you will install fireplace plus any adjoining rooms with doorless passageways or ventilation grills between the rooms. 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.
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. These spaces include attics and crawl spaces. Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.
Installation Continued CAUTION: This heater creates warm air currents. These currents move heat to wall surfaces 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 fluids, oil or kerosene lamps, etc.) in the air exist, may discolor walls or cause odors. Important: Vent-free heaters add moisture to the air.
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. Minimum Noncombustible Material Clearances If Not Using Mantel Note: If using a mantel proceed to If Using Mantel. If not using a mantel, follow the information on this page.
Installation Mantel Shelf 12" Continued Underside of Mantel Shelf 10" 8" NOTICE: Surface temperatures of adjacent walls and mantels become hot during operation. Walls and mantels above the firebox may become hot to the touch. If installed properly, these temperatures meet the requirement of the national product standard. Follow all minimum clearances shown in this manual.
Damper Clamp Installation Continued Damper 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. There are three reasons for operating your heater in the vented mode. 1.
Installation Heater Gas Regulator 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. See Optional Positioning Of Thermostat Sensing Bulb, page 32.
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 service person must connect heater to gas supply. Follow all local codes. CAUTION: Never connect propane/LP fireplace directly to the propane/LP supply. This heater requires an external regulator (not supplied). Install the external regulator between the heater and propane/LP supply.
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. The equipment shutoff valve is for turning on or shutting off the gas to the appliance. Check your building codes for any special requirements for locating equipment shutoff valve to fireplaces.
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 detection fluid to all joints. Bubbles forming show a leak. Correct all leaks at once. CAUTION: Make sure external regulator has been installed between propane/LP supply and heater. See guidelines under Connecting to Gas Supply, page 14.
4. Disconnect gas line from heater base as shown in Figure 11 or 12, page 13. Installation Continued Propane/LP Supply Tank Equipment Shutoff Valve Thermostat Gas Valve or Control Valve Location Figure 18 - Checking Gas Joints (Propane/LP Only) WARNING: A qualified service person must connect and disconnect gas to heater. Follow all local codes. 5. Remove heater base from fireplace. 6. Install receiver bracket to base with phillips screws provided in hardware kit as shown in Figure 20. 7.
Installation Battery Cover 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 interfere with burner or pilot. 10. If heater was removed from fireplace before installation of remote accessory, see Installing Heater Base Assembly on page 12 to reinstall heater into fireplace. Test gas connection for leaks (see Checking Gas Connections, page 16). 11.
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 Rear Log CRB and HRB Model Logs Only 1. Place bottom log in center of the base assembly as shown in Figure 27. 2. Rest rear log in back corner sections of base assembly as shown in Figure 27. Make sure log is completely vertical and not leaning in toward burner where the flame will touch the log. 3.
Operating Heater Thermostat-Controlled Models FOR YOUR SAFETY READ BEFORE LIGHTING 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.
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 supply. If so, the control knob may need to be pressed in for 30 seconds or more. This will allow air to bleed from the gas system. 6. With control knob pressed in, press and release ignitor button. This will light pilot. The pilot is attached to the front burner.
Operating Heater LIGHTING INSTRUCTIONS Continued Remote-Ready Models FOR YOUR SAFETY READ BEFORE LIGHTING 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.
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. Press in and turn control knob counterclockwise to the PILOT position. Press in control knob for five (5) seconds (see Figure 30). Note: You may be running this heater for the first time after hooking up to gas supply.
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. Now follow steps 9 through 11, Lighting Instructions, page 23. To Lock press both buttons on hand-held remote control until light stops flashing. Handheld remote control is now locked.
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. Press the POWER and LOCK buttons together to turn on the hand-held remote control. 2. Press AUTO button to select this mode. 3. Set the desired room temperature by pressing the TEMP + or - buttons. 4.
Inspecting Burners Continued FRONT BURNER FLAME PATTERN Figure 38 shows correct front burner flame pattern. 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 produce increased levels of carbon monoxide. If front burner flame pattern shows yellow tipping, follow instructions at bottom of this page. Yellow flame on rear burner is normal.
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. 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. A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly.
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 POSSIBLE CAUSE REMEDY When ignitor button is pressed, there is no spark at ODS/pilot 1. Ignitor electrode not connected to ignitor cable 2. Ignitor cable pinched or wet 1.
Troubleshooting OBSERVED PROBLEM ODS/pilot lights but flame goes out when control knob is released Continued POSSIBLE CAUSE 1. Control knob not fully pressed in 2. Control knob not pressed in long enough 3. Safety interlock system has been triggered 4. Equipment shutoff valve not fully open 5. Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot flame to go out.
Troubleshooting OBSERVED PROBLEM Continued POSSIBLE CAUSE REMEDY Slight smoke or odor during initial operation 1. Residues from manufacturing processes and logs curing 1. Problem will stop after a few hours of operation Heater produces a whistling noise when burners are lit 1. Turning control knob to HI position when burners are cold 2. Air in gas line 1. Turn control knob to LO position and let warm up for a minute 2. Operate burners until air is removed from line.
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 heater where impurities in air exist may create odors.
Optional Positioning of Thermostat Sensing Bulb (Thermostat-Controlled Models Only) For Masonry and Factorybuilt Metal Fireplace If your log set cycles to pilot, but the room temperature drops to a lower than ideal comfort level before the log set comes back on, you may want to reposition the thermostat sensing bulb. 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 applications.
Optional Positioning of Thermostat Sensing Bulb Continued 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. Press the clip into the new location so that the thermostat sensing bulb will be positioned vertically with the capillary at the bottom (see Figure 48). Slide the thermostat sensing bulb into the clip.
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. 3 4 5 2 6 1 PART NUMBER VUL18NT VUL18PT KEY VUL18NR NO.
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. 1 3 2 PART NUMBER HRB3624NT HRB3624PT HRB3924NR HRB3924PR KEY CRB2618NR CRB3624NR CRB3630NR NO.
Illustrated Parts Breakdown Thermostat-controlled Models VUL18NT, VUL18PT, VUL24NT, VUL24PT, VUL30NT, VUL30PT, HRB3624NT AND HRB3624PT 8 9 3 8 4 6 11 LPG 8 5 7 10 2 23 2 1 8 25 12 24 13 18 22 16 21 17 20 36 19 www.desatech.
PARTS LIST Thermostat-controlled Models Key No. Part No.
ILLUSTRATED PARTS BREAKDOWN Remote-Ready Variable Control Models VUL18NR, VUL18PR, VUL24NR, VUL24PR, VUL30NR, VUL30PR 8 9 3 4 8 6 11 LPG 5 8 7 1 24 23 2 14 14 14 21 22 12 15 10 17 19 16 20 38 13 18 www.desatech.
PARTS LIST Remote-Ready Variable Control Models Key No. Part No.
ILLUSTRATED PARTS BREAKDOWN Remote-Ready Variable Control Models CRB2618NR, CRB2618PR, CRB3624NR, CRB3624PR, CRB3630NR, CRB3630PR, HRB3624NR AND HRB3624PR 8 9 3 4 8 6 11 LPG 5 8 7 1 24 23 2 14 14 14 21 22 12 15 10 17 19 16 20 40 13 18 www.desatech.
PARTS LIST Remote-Ready Variable Control Models 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 ** 111435-01 112465-01 112465-02 113242-01 113242-02 103779-01 103778-01 112713-01 112713-03 098249-01 M11084-26 112782-01 112782-02 101480-12 101004-11 101004-10 101004-04 101004-02 101004-11 101004-10 101004-08 101004-06 112708-01 M12461-26 099918-02 099387-12 099387-09 098264-02 103781-01 103781-02 103784-01 103784-02 111173-01 112715-01 098271-12 100609-01 099387-14 Description Ramp Burner Asse
Service Hints When Gas Pressure Is Too Low • pilot will not stay lit • burners will have delayed ignition • heater will not produce specified heat • propane/LP gas supply may be low You may feel your gas pressure is too low. If so, contact your local propane/LP or natural gas supplier. Accessories Purchase these heater accessories from your local dealer. If they can not supply these accessories, call DESA Heating Products at 1-866-672-6040 for referral information.
VENT-FREE LOGMATE® FIREBOXES Accessories (Not Shown) Available in 32", 36" and 42" models. Circulating fireboxes feature louvers and an optional blower. Non-circulating, smooth face models are ideal for custom trim applications such as stone or marble. Continued RECEIVER AND HAND-HELD THERMOSTAT REMOTE CONTROL KIT - hrc200 For all Remote-Ready Models. Allows the fireplace to be operated in a manually or thermostatically controlled mode.
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.