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Desa VUL18NR Owner's Operation And Installation Manual

Unvented (vent-free) gas log heater
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UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
Remote-Ready Models VUL18/24/30/36(N,P)R
Thermostatically-Controlled Models VUL18/24/30/36(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.
— 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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  • Page 1 UNVENTED (VENT-FREE) GAS LOG HEATER OWNER’S OPERATION AND INSTALLATION MANUAL Remote-Ready Models VUL18/24/30/36(N,P)R Thermostatically-Controlled Models VUL18/24/30/36(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.

  • Page 2: Table Of Contents

    TAbLE OF CONTENTS Safety ..............2 Wiring Diagram ..........28 Unpacking............5 Troubleshooting ..........29 Product Identification ........... 5 Optional Positioning of Local Codes............5 Thermostat Sensing Bulb ......33 Optional Remote Control Accessories ....5 Specifications ............ 33 Air For Combustion and Ventilation ..... 6 Parts ..............
  • Page 3 SAFETy Continued WARNING: This product con- WARNING: Do not allow fans tains and/or generates chemicals to blow directly into the fireplace. known to the state of California Avoid any drafts that alter burner to cause cancer or birth defects flame patterns. Ceiling fans can or other reproductive harm.
  • Page 4 SAFETy Continued 1. This appliance is only for use with the type 9. Before using furniture polish, wax, carpet of gas indicated on the rating plate. This cleaner or similar products, turn heater off. If appliance is not convertible for use with heated, the vapors from these products may other gases.

  • Page 5: Unpacking

    3. Check heater for any shipping damage. If information. heater is damaged call DESA Heating, LLC at 1-866-672-6040 for replacement parts 1. Remove logs and heater base assembly before returning to dealer.

  • Page 6: Air For Combustion And Ventilation

    PRODUCT FEATURES OPERATION SAFETY DEVICE This heater is clean burning. It requires no This heater has a pilot with an Oxygen Deple- outside venting. There is no heat loss out a tion Sensing (ODS) safety shutoff system. The vent or up a chimney. Heat is generated by ODS/pilot is a required feature for vent-free both realistic flames and glowing coals.
  • Page 7 AIR FOR COMbUSTION AND VENTILATION Continued If your home meets all of the three criteria 2. Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support. above, you must provide additional fresh air. See Ventilation Air From Outdoors, ________ (volume of space) x 20 = (Maxi- page 8.
  • Page 8 AIR FOR COMbUSTION AND VENTILATION Continued Ventilation Air From Outdoors WARNING: If the area in which Provide extra fresh air by using ventilation the heater may be operated does grills or ducts. You must provide two perma- nent openings: one within 12" of the ceiling not meet the required volume for and one within 12"...

  • Page 9: Installation

    INSTALLATION NOTICE: This heater is intended WARNING: Seal any fresh for use as supplemental heat. air vents or ash clean-out doors Use this heater along with your located on floor or wall of fire- primary heating system. Do not place. If not, drafting may cause install this heater as your pri- pilot outage or sooting.
  • Page 10 INSTALLATION Continued CHECK GAS TYPE Example: The face of a mantel, bookshelf, etc. is made of combustible material and Use the correct type of gas (natural or propane/ protrudes 3 " from the wall. This com- LP). If your gas supply is not the correct gas bustible material must be 4"...

  • Page 11: Mantel Clearances

    INSTALLATION Continued MINIMUM NONCOMbUSTIbLE If Using Mantel MATERIAL CLEARANCES You must have noncombustible material(s) above the fireplace opening. Noncombustible If Not Using Mantel materials (such as slate, marble, tile, etc.) Note: If using a mantel proceed to If Using must be at least 1/2" thick. With sheet metal, Mantel.
  • Page 12 INSTALLATION Continued Determining Minimum Mantel Clearance FLOOR CLEARANCES When Using a Hood A. If installing appliance on the floor level, If minimum clearances in Figure 6, page 11, are you must maintain the minimum distance not met, you must have a hood. When using of 14"...
  • Page 13 INSTALLATION Continued 2. State or local codes do not permit vent- INSTALLING HEATER bASE free operation. ASSEMbLY 3. You prefer vented operation. WARNING: You must secure If reasons number 1 or 2 apply to you, you must permanently open chimney flue damper. this heater to fireplace floor.
  • Page 14 INSTALLATION Continued Masonry 1. Apply pipe joint sealant lightly to male Screw threads of gas fitting (provided). For Thermostatically-Controlled Models con- nect approved flexible gas hose to gas regulator of heater (see Figure 11). For Remote-Ready models connect approved flexible gas hose to inlet side of gas con- trol (see Figure 12).
  • Page 15 INSTALLATION Continued Installation Items Needed IMPORTANT: Install equipment shutoff valve Before installing heater, make sure you have in an accessible location. The equipment the items listed below. shutoff valve is for turning on or shutting off the gas to the appliance. •...
  • Page 16 INSTALLATION Continued We recommend that you install a sediment CHECKING GAS CONNECTIONS trap in supply line as shown in Figure 15, WARNING: Test all gas piping page 15, or Figure 16, depending on your model. Locate sediment trap where it is within and connections, internal and reach for cleaning.
  • Page 17 INSTALLATION Continued Test Pressures Equal To or Less Than PRESSURE TESTING HEATER GAS 1/2 PSIG (3.5 kPa) CONNECTIONS 1. Close equipment shutoff valve (see Fig- 1. Open equipment shutoff valve (see Fig- ure 17). ure 17). 2. Pressurize supply piping system by either 2.
  • Page 18 INSTALLATION Continued 5. Remove heater base from fireplace. 11. If logs were removed from heater for in- 6. Install receiver bracket to base with Phil- stall remote accessory, replace logs (see lips screws provided in hardware kit as Installing Logs, page 19). shown in Figure 20.
  • Page 19 INSTALLATION Continued INSTALLING LOGS Installing Logs (All Models) 1. Place bottom log in center of the base as- WARNING: Failure to posi- sembly as shown in Figure 26. tion the parts in accordance 2. Rest rear log in back corner sections of base assembly as shown in Figure 26.

  • Page 20: Operation

    INSTALLATION Continued 8. For VUL36 models, position left and right Left Small Front Log control cover logs as shown in Figure 28, Bracket page 20. These may be placed as desired to hide controls. Middle Right Log Middle Left Log Left Control Cover Log Bracket...
  • Page 21 OPERATION Continued THERMOSTAT-CONTROLLED MODELS C. Use only your hand to push in or turn WARNING: Damper handle the gas control knob. Never use tools. will be hot if heater has been If the knob will not push in or turn by running.
  • Page 22 OPERATION Continued THERMOSTAT-CONTROLLED MODELS Note: If pilot goes out, repeat steps 3 2. Close equipment shutoff valve (see Figure through 7. This heater has a safety inter- 17, page 17). lock system. Wait one (1) minute for sys- THERMOSTAT CONTROL tem to reset before lighting pilot again.
  • Page 23 OPERATION Continued REMOTE-READy MODELS LIGHTING WARNING: burners will come INSTRUCTIONS on automatically within one minute when the selector switch is in the WARNING: ON position after the pilot is lit. • If fireplace has glass doors, never operate this heater with 5.
  • Page 24 OPERATION Continued REMOTE-READy MODELS 10. Wait one minute and switch selector TO TURN OFF GAS switch to the ON position to light burners. TO APPLIANCE Note: AUTO is only functional when using 1. Turn control knob clockwise to the GWMT1 or GWMS2 optional accessories. OFF position.
  • Page 25 OPERATION Continued REMOTE-READy MODELS Flame Adjustment 2. Press the MANU button to turn on the Control Knob in Knob fireplace. On Position 3. Press the POWER and LOCK buttons together to turn off the fireplace. Auto (Thermostatic) Mode REMOTE 1. Press the POWER and LOCK buttons REMOTE together to turn on the hand-held remote Selector Toggle Switch (Optional...

  • Page 26: Inspecting Burners

    OPERATION Continued REMOTE-READy MODELS Auto Shutoff Feature Key Pad Lock Feature 1. If the average room temperature reaches This feature allows the user to lock/unlock the a range of 82° F (28° C) to 92° F (33° C), keypad on the hand-held remote in the MANU the hand-held remote control will perform or AUTO mode to prevent inadvertent op- a safety override and shut the fireplace...

  • Page 27: Cleaning And Maintenance

    INSPECTING bURNERS Continued If front burner flame pattern is incorrect, as NOTICE: Do not mistake orange shown in Figure 41 flames with yellow tipping. Dirt • turn heater off (see To Turn Off Gas to Appli- or other fine particles are burned ance, page 22 [Thermostat-Controlled Mod- by heater, causing brief patches els] or page 24 [Remote-Ready Models])

  • Page 28: Wiring Diagram

    CLEANING AND MAINTENANCE Continued 4. Check injector holder located at the end of LOGS the burner tube again. Remove any large • If you remove logs for cleaning, refer to particles of dust, dirt, lint or pet hair with Installing Logs, page 19, to properly replace a soft cloth or vacuum cleaner nozzle.

  • Page 29: Troubleshooting

    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...
  • Page 30 TROUbLESHOOTING Continued ObSERVED PRObLEM POSSIbLE CAUSE REMEDY ODS/pilot lights but flame 1. Control knob not fully 1. Press in control knob fully goes out when control knob pressed in is released 2. Control knob not pressed in 2. After ODS/pilot lights, keep long enough control knob pressed in 30 seconds...
  • Page 31 TROUbLESHOOTING Continued ObSERVED PRObLEM POSSIbLE CAUSE REMEDY Yellow flame in front burner 1. Not enough air 1. Check burner(s) for dirt during burner combustion and debris. If found, clean burner(s) (see Cleaning and Maintenance, page 27) 2. Gas regulator defective 2.
  • Page 32 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. Fol- low the gas supplier’s instructions.

  • Page 33: Optional Positioning Of

    • Inlet Gas Pressure (in. of water): Max - 14" W.C., Min* - 11" W.C. • Inlet Gas Pressure (in. of water): Max - 14" W.C., Min* - 11" W.C. VUL18NT, VUL18NR VUL24NT, VUL30NT, VUL36NT, • Rating (Variable): 19,000/28,000 Btu/Hr VUL24NR, VUL30NR, VUL36NR •...

  • Page 34: Parts

    PARTS THERMOSTAT-CONTROLLED MODELS VUL18NT, VUL18PT, VUL24NT, VUL24PT, VUL30NT, VUL30PT, VUL36NT, VUL36PT www.desatech.com 122001-01C...
  • Page 35 PARTS THERMOSTAT-CONTROLLED MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 40 of this manual. NO. PART NO. DESCRIPTION QTY. Ramp Burner Base • • • • •...
  • Page 36 PARTS REMOTE-READY VARIAbLE CONTROL MODELS VUL18NR, VUL18PR, VUL24NR, VUL24PR, VUL30NR, VUL30PR, VUL36NR, VUL36PR www.desatech.com 122001-01C...
  • Page 37 PARTS 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 40 of this manual. NO. PART NO. DESCRIPTION QTY. Ramp Burner Base • • •...
  • Page 38 PARTS LOG MODELS VUL18NT, VUL18PT, VUL24NT, VUL24PT, VUL30NT, VUL30PT, VUL18NR, VUL18PR, VUL24NR, VUL24PR, VUL30NR, VUL30PR This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 40 of this manual.
  • Page 39 PARTS LOG MODELS VUL36NR, VUL36PR, VUL36NT AND VUL36PT This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 40 of this manual. PART NUMbER VUL36NT VUL36NR VUL36PT VUL36PR DESCRIPTION 121699-07 121699-13 Bottom Log 121699-14 121699-14 Middle Right Log 121699-15 121699-15 Middle Left Log...

  • Page 40: Service Hints

    • propane/LP gas supply may be low serial numbers of your heater ready. You may feel your gas pressure is too low. If You can also visit DESA Heating Products’ so, contact your local propane/LP or natural technical services web site at gas supplier.
  • Page 41 ACCESSORIES Continued WALL-MOUNT ON/OFF SWITCH GWMS2 For all Remote-Ready Models. Allows the gas log heater to be turned on and off with RECEIVER AND HAND-HELD a wall switch. THERMOSTAT REMOTE CONTROL KIT - HRC200 VENT-FREE LOGMATE FIREbOXES ® For all Remote-Ready Models. Allows the Available in 32", 36"...
  • Page 42 NOTES _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ www.desatech.com 122001-01C...
  • Page 43 NOTES _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ 122001-01C www.desatech.com...

  • Page 44: 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.

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