OWNER'S OPERATION AND INSTALLATION MANUAL UNVENTED (VENT-FREE) GAS LOG HEATER VRL24NR, VRL24PR, VRL30NR, VRL30PR, CSG3924NR, CSG3924PR CTB3924NR, CTB3924PR 24" and 30" Thermostat Models: VRL24NT, VRL24PT, VRL30NT, VRL30PT, CSG3924NT, CSG3924PT CTB3924NT, CTB3924PT

ManualsBrandsDesa ManualsWater HeaterVRL30PT

UNVENTED (VENT-FREE) GAS LOG HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

Remote-Ready Models Also Design-Certified As Vented

Decorative Appliances

Save this manual for future reference.

WARNING: If the information in this manual

is not followed exactly, a fire or explosion

may result causing property damage, per-

sonal 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 qualified installer, service agency, or

the gas supplier.

WARNING: Improper installation, adjust-

ment, 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 appliance is for installa-

tion only in a solid-fuel burning masonry or

UL127 factory-built fireplace, or in an ap-

proved ventless firebox. It is design-certi-

fied for these installations in accordance

with ANSI Z21.11.2. Exception: Do not in-

stall this appliance in a factory-built fire-

place that includes instructions stating it

has not been tested or should not be used

with unvented gas logs. For unmarked fac-

tory-built fireplaces, contact fireplace manu-

facturer if unsure of this application.

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. Refer

Air for Combustion and Ventilation

section on page 5 of this manual.

For more information, visit www.desatech.com

This appliance may be installed in an aftermarket,* permanently located, manufactured

(mobile) home, where not prohibited by local codes.

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.

* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

24" and 30"Remote-Ready Models:

VRL24NR, VRL24PR, VRL30NR,

VRL30PR, CSG3924NR, CSG3924PR

CTB3924NR, CTB3924PR

24" and 30" Thermostat Models:

VRL24NT, VRL24PT, VRL30NT,

VRL30PT, CSG3924NT, CSG3924PT

CTB3924NT, CTB3924PT

Summary of content (38 pages)

PAGE 1
TM UNVENTED (VENT-FREE) GAS LOG HEATER OWNER’S OPERATION AND INSTALLATION MANUAL For more information, visit www.desatech.
PAGE 2
TABLE OF CONTENTS SAFETY INFORMATION TABLE OF CONTENTS SAFETY INFORMATION ............................................................ 2 TROUBLESHOOTING .............................................................. 24 PRODUCT IDENTIFICATION ..................................................... 4 OPTIONAL POSITIONING OF OPTIONAL REMOTE CONTROL ACCESSORIES .................... 4 THERMOSTAT SENSING BULB ......................................... 27 LOCAL CODES ........................................
PAGE 3
SAFETY INFORMATION 3 3 SAFETY INFORMATION Continued 1. 2. 3. 4. 5. 6. 7. 8. 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. Do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outdoors.
PAGE 4
PRODUCT IDENTIFICATION OPTIONAL REMOTE CONTROL ACCESSORIES LOCAL CODES UNPACKING PRODUCT IDENTIFICATION Log Set (Varies According to Model) OPTIONAL REMOTE CONTROL ACCESSORIES There are four optional remote controls that can be purchased separately for Remote-Ready Models Only: • wall switch • hand-held ON/OFF remote • wall thermostat • hand-held thermostat remote. See Accessories, page 34. Grate The wall thermostat or hand-held thermostat may not be used where vented decorative listing is required.
PAGE 5
PRODUCT FEATURES Operation Safety Device Piezo Ignition System 5 5 AIR FOR COMBUSTION AND VENTILATION Providing Adequate Ventilation PRODUCT FEATURES OPERATION PROVIDING ADEQUATE VENTILATION This heater is clean burning. It requires no outside venting. There is no heat loss out a vent or up a chimney. Heat is generated by both realistic flames and glowing coals. This heater is designed for ventfree operation with flue damper closed. It has been tested and approved to ANSI Z21.11.
PAGE 6
AIR FOR COMBUSTION AND VENTILATION Determining Fresh-Air Flow For Heater Location AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION 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: Determining if You Have a Confined or Unconfined Space A. Rework worksheet, adding the space of an adjoining room.
PAGE 7
AIR FOR COMBUSTION AND VENTILATION Ventilation Air AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2). You can also remove door into adjoining room (see option 3, Figure 2).
PAGE 8
INSTALLATION Check Gas Type Installation and Clearances For Vent-Free Operation 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.
PAGE 9
INSTALLATION Installation and Clearances For Vent-Free Operation (Cont.) 9 9 INSTALLATION Continued Carefully follow the instructions below. This will ensure safe installation into a masonry, UL127-listed manufactured fireplace, or listed vent-free firebox. Minimum Clearances For Side Combustible Material, Side Wall, and Ceiling A. Clearances from the side of the fireplace cabinet to any combustible material and wall should follow diagram in Figure 4. Example: The face of a mantel, bookshelf, etc.
PAGE 10
INSTALLATION Mantel Clearances Floor Clearances INSTALLATION Continued MANTEL CLEARANCES Mantel Shelf 10" Underside of Mantel Shelf 8" In addition to meeting noncombustible material clearances, you must also meet required clearances between fireplace opening and mantel shelf. If you do not meet the clearances listed below, you will need a hood.
PAGE 11
INSTALLATION Installing Damper Clamp Accessory For Vented Operation Installing Heater Base Assembly 11 11 INSTALLATION Continued INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION (Remote-Ready Models Only) 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, you may use this heater as a vented product.
PAGE 12
INSTALLATION 12 Installing Heater Base Assembly (Cont.) Connecting To Gas Supply INSTALLATION Continued 2. 3. Locate two masonry screws in hardware package. Attach extension plates (left and right on 30" models only) to base by placing tabs into base slots. Use supplied screws (2) to secure extension plates to base (see Figure 12). 4. Place heater base in fireplace. 5. Place logs in their proper position on heater base (see Installing Logs, pages 15 and 16). 6.
PAGE 13
INSTALLATION Connecting To Gas Supply (Cont.) 13 13 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 Figure 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.
PAGE 14
INSTALLATION Checking Gas Connections INSTALLATION Continued CHECKING GAS CONNECTIONS WARNING: Test all gas piping and connections 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.
PAGE 15
INSTALLATION Installing Logs 15 15 INSTALLATION Continued INSTALLING LOGS WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury. Log #3 CAUTION: After installation and periodically thereafter, check to ensure that no yellow flame comes in contact with any log. With the heater set to HI, check to see if flames contact any log.
PAGE 16
INSTALLATION Installing Logs (Cont.) INSTALLATION Continued Models VRL24NR, VRL24PR, VRL30NR, VRL30PR, VRL24NT, VRL24PT, VRL30NT and VRL30PT 1. 2. 3. 4. 5. 6. Place log #1 (ember bed) onto base over log alignment screws to the left of front burner and behind middle burner. Log #1 will sit on top of front and middle burners (see Figure 24). Place log #2 to right of log #1 and onto two log alignment screws as shown in Figure 25. Log #2 will wrap around right end of rear burner (see Figure 25).
PAGE 17
INSTALLATION Attaching Grate To Base Assembly OPERATING HEATER (THERMOSTAT-CONTROLLED MODELS) 17 17 For Your Safety Read Before Lighting Lighting Instructions INSTALLATION OPERATING HEATER Continued ATTACHING GRATE TO BASE ASSEMBLY Locate the two slots in the front of the base assembly. Carefully slide the decorative grate into these slots (see Figure 28).
PAGE 18
OPERATING HEATER (THERMOSTAT-CONTROLLED MODELS) Lighting Instructions (Cont.) To Turn Off Gas To Appliance OPERATING HEATER Continued Note: Home owners generally prefer to operate their heater with the chimney damper closed. This will put all the heat into the room. However, there may be times you will desire the full flames of the HI heat setting but will find the heat output excessive. You can open the chimney damper (if you have one) fully or partially to release some of the heat.
PAGE 19
OPERATING HEATER (THERMOSTAT-CONTROLLED MODELS) Thermostat Control Manual Lighting Procedure 19 19 OPERATING HEATER (REMOTE-READY MODELS) For Your Safety Read Before Lighting Lighting Instructions OPERATING HEATER Continued THERMOSTAT CONTROL OPERATION LIGHTING INSTRUCTIONS The thermostat control knob can be set to any comfort level between HI and LO.
PAGE 20
OPERATING HEATER (REMOTE-READY MODELS) 20 Lighting Instructions (Cont.) To Turn Off Gas To Appliance Manual Lighting Procedure OPERATING HEATER Continued 7. With control knob pressed in, press and release ignitor button. This will light pilot. The pilot is attached to the front burner. If needed, keep pressing ignitor button until pilot lights. Note: If pilot does not stay lit, contact a qualified service person or gas supplier for repairs. Until repairs are made, light pilot with match.
PAGE 21
OPERATING HEATER (REMOTE-READY MODELS) OPTIONAL REMOTE OPERATION 21 21 OPERATING HEATER Continued OPTIONAL REMOTE OPERATION Note: All remote control accessories must be purchased separately (see Accessories, page 34). Follow instructions included with the remote control. Thermostat Control Operation (Optional GHRCTA Series Only) The thermostat control setting on the remote control unit can be set to any comfort level between WARMER and COOLER.
PAGE 22
INSPECTING BURNERS Pilot Flame Pattern Burner Flame Patterns INSPECTING BURNERS Check pilot flame pattern and burner flame patterns often. PILOT FLAME PATTERN Figure 37 shows a correct pilot flame pattern. Figure 38 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down.
PAGE 23
CLEANING AND MAINTENANCE Cleaning Burner Injector Holders and Pilot Air Inlet Holes 23 23 CLEANING AND MAINTENANCE Injector Holder WARNING: Turn off heater and let cool before cleaning. Burner Tube CAUTION: You must keep control areas, burners, and circulating air passageways of heater clean. Inspect these areas of heater before each use. Have heater inspected yearly by a qualified service person.
PAGE 24
TROUBLESHOOTING TROUBLESHOOTING WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater. Note: For additional help, visit DESA International’s technical service web site at www.desatech.com. 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.
PAGE 25
TROUBLESHOOTING 25 25 TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY One or more burners do not light after ODS/ pilot is lit 1. Inlet gas pressure is too low 1. Contact local natural or propane/LP gas company 2. Clean burner(s) (see Cleaning and Maintenance, page 23) or replace burner orifice(s) 3. Contact qualified service person 4. Reconnect leads (see Wiring Diagram, page 28) 2. Burner orifice(s) clogged 3. Mislocated crossover tube 4.
PAGE 26
TROUBLESHOOTING 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.
PAGE 27
OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB (THERMOSTAT-CONTROLLED MODELS ONLY) 27 27 For Masonry and Factory-Built Metal Fireplace 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 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.
PAGE 28
SPECIFICATIONS WIRING DIAGRAM (REMOTE-READY MODELS ONLY) SERVICE HINTS TECHNICAL SERVICE 28 SPECIFICATIONS 24" Thermostat-Controlled Btu (Variable) 10,000/40,000 Type Gas Propane/LP Ignition Piezo Manifold Pressure 7.4" W.C. Inlet Gas Pressure (in. of water) Maximum 14" Minimum* 11" Shipping Weight 30 lbs. Certified Standards Z21.11.2-2000 * For purpose of input adjustment 30" Thermostat-Controlled 10,000/40,000 Natural Piezo 3.0" W.C. 10,000/40,000 Propane/LP Piezo 7.4" W.C.
PAGE 29
ILLUSTRATED PARTS BREAKDOWN Logs ILLUSTRATED PARTS BREAKDOWN LOGS 7 6 7 6 4 5 5 4 3 2 3 2 Log Set for Models: CSG3924NT, CSG3924PT, CSG3924NR, CSG3924PR, CTB3924NT, CTB3924PT, CTB3924NR, and CTB3924PR Log Set for Models: VRL24NT, VRL24PT, VRL24NR, VRL24PR, VRL30NT, VRL30PT, VRL30NR, VRL30PR PART NUMBER FOR CSG3924NT CSG3924PT CSG3924NR CSG3924PR VRL24NT VRL30NT CTB3924NT VRL24PT VRL30PT CTB3924PT KEY VRL24NR VRL30NR CTB3924NR NO.
PAGE 30
ILLUSTRATED PARTS BREAKDOWN Thermostat-Controlled VRL24NT, VRL24PT, VRL30NT, VRL30PT CSG3924NT, CSG3924PT, CTB3924NT, CTB3924PT ILLUSTRATED PARTS BREAKDOWN THERMOSTAT-CONTROLLED VRL24NT, VRL24PT 29 VRL30NT, VRL30PT CSG3924NT, CSG3924PT CTB3924NT, CTB3924PT 5 13 9 6 7 30 4 27 8 27 27 20 14 8 27 15 27 27 19 10 25 26 23 3 11 1 22 18 16 21 17 12 24 2 28 For more information, visit www.desatech.
PAGE 31
PARTS LIST Thermostat-Controlled VRL24NT, VRL24PT, VRL30NT, VRL30PT CSG3924NT, CSG3924PT, CTB3924NT, CTB3924PT 31 31 PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 34 of this manual. THERMOSTAT-CONTROLLED PART NUMBER FOR KEY VRL24NT VRL24PT NO.
PAGE 32
ILLUSTRATED PARTS BREAKDOWN Remote-Ready Models VRL24NR, VRL24PR, VRL30NR, VRL30PR CSG3924NR, CSG3924PR, CTB3924NR, CTB3924PR ILLUSTRATED PARTS BREAKDOWN REMOTE-READY VRL24NR, VRL24PR 29 VRL30NR, VRL30PR CSG3924NR, CSG3924PR CTB3924NR, CTB3924PR 5 13 6 9 30 7 27 4 21 8 32 33 32 32 34 8 32 32 19 32 P ILOT N O FF O 31 15 25 23 14 26 10 1 3 20 21 18 16 12 22 Natural Gas Models Only 17 11 24 2 28 For more information, visit www.desatech.
PAGE 33
PARTS LIST Remote-Ready Models VRL24NR, VRL24PR, VRL30NR, VRL30PR CSG3924NR, CSG3924PR, CTB3924NR, CTB3924PR PARTS LIST 33 33 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 34 of this manual. REMOTE-READY KEY NO.
PAGE 34
REPLACEMENT PARTS ACCESSORIES REPLACEMENT PARTS Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty. PARTS UNDER WARRANTY Contact authorized dealers of this product. If they can’t supply original replacement part(s), call DESA International’s Technical Service Department at 1-866-672-6040.
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35 OWNER'S REGISTRATION FORM In order to provide better customer service for this and future purchases, we recommend that you register your product with us. You can register online at www.desatech.com. If access to our website is not available to you, please complete this Owner’s Registration Form and mail to the address on the back of this owner’s manual. Please provide the following product information: Brand: (Comfort Glow, Vanguard, etc.) Model: (EFP33PR, VTGH33NR, etc.
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Postage Required TM 2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 For more information, visit www.desatech.
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NOTES 37 37 NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ ____________
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TM 2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 www.desatech.com 110021 01 NOT A UPC 110021-01 Rev. A 04/02 For more information, visit www.desatech.