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INTERNATIONAL

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.

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
to 

Air for Combustion and Ventilation section on page 5 of this manual.

For more information, visit www.desatech.com

For more information, visit www.desatech.com

This appliance may be installed in an aftermarket,* 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

24" and 30" Thermostat-

Controlled

Summary of Contents for CGX3924NR

Page 1: ...tional information consult a qualified installer serviceagency orthegassupplier WARNING This appliance is for installa tion only in a solid fuel burning masonry or UL127 factory built fireplace or in...

Page 2: ...s firebox enclosure WARNING Do not allow fans to blow directly into the fireplace Avoid any drafts that alter burner flame patterns Ceiling fans can create drafts that alter burner flame patterns Alte...

Page 3: ...re polish wax carpet cleaner or similar products turn heater off If heated the vapors from these prod ucts may create a white powder residue within burner box or on adjacent walls and furniture 9 This...

Page 4: ...y and safety information 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 w...

Page 5: ...n dows and doors and c caulking or sealants are applied to areas such as joints around window and door frames between sole plates and floors between wall ceiling joints between wall panels at penetrat...

Page 6: ...ts to the outdoors Example Gas water heater _____________ Btu Hr Vent free heater _____________ Btu Hr Total _____________ Btu Hr 4 Compare the maximum Btu Hr the space can support with the actual amo...

Page 7: ...ilation 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 8: ...tant sealant Do not seal chimney flue damper WARNING Never install the heater in a bedroom or bathroom unless installed as a ventedappliance seepage11 Remote ReadyMod els Only in a recreational vehicl...

Page 9: ...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 You must have noncombustible...

Page 10: ...djacent 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 prod...

Page 11: ...HEATER BASE ASSEMBLY WARNING You must secure this heater to fire place floor If not heater will move when you adjust controls Moving heater may cause a gas leak WARNING If installing in a sunken fire...

Page 12: ...his heater requires an external regulator not supplied Install the external regulator between the heater and pro pane LP supply Installation Items Needed Before installing heater make sure you have th...

Page 13: ...oistureandcontaminants This keeps them from going into heater controls If sediment trap is not installed or is installed wrong heater may not run properly CAUTION Avoid damage to regulator Hold gas re...

Page 14: ...G 3 5 kPa 1 Close equipment shutoff valve see Figure 16 2 Pressurize supply piping system by either opening propane LP supply tank valve for propane LP gas or opening main gas valve located on or near...

Page 15: ...plied with heater Models CGX3924NT CGX3924PT CGX3930NT CGX3930PT CGX3924NR AND CGX3924PR 1 Place log 1 ember bed onto the base Position the log over the shoulder bolts on either side of the front burn...

Page 16: ...d onto the two tabs on the right side of the base as shown in Figure 24 3 Place log 3 on the left side of the base It will wrap around the front end of the back burner and onto two tabs on the base se...

Page 17: ...log 3 on the left side of the base It will wrap around the front end of the back burner and fit over the tab at the front of the base see Figure 30 4 Place log 4 onto the pins on the right side of lo...

Page 18: ...ls If the knob will not push in or turn by hand don t try to repair it call a qualified service techni cian or gas supplier Force or attempted repair may result in a fire or explosion D Do not use thi...

Page 19: ...ier for repairs Until repairs are made light pilot with match To light pilot with match see Manual Lighting Procedure on page 20 7 Keep control knob pressed in for 30 seconds after lighting pilot Afte...

Page 20: ...to inspect the appliance and to replace any part of the control system and any gas control which has been under water FOR YOUR SAFETY READ BEFORE LIGHTING 1 STOP Read the safety information in column...

Page 21: ...ilot The pilot is attached to the front burner Ifneeded keeppressingignitorbuttonuntilpilotlights Note If pilot does not stay lit contact a qualified service person or gas supplier for repairs Until r...

Page 22: ...3 seconds to assure proper operation GHRC Series Operation 2a Press the ON OFF button to turn the burners on and off When turning burners off the pilot will remain lit GHRCTA Series Operation 2b Press...

Page 23: ...r off see To Turn Off Gas to Appliance page 19 Ther mostat Controlled Models or page 21 Remote Ready Models see Troubleshooting pages 25 through 27 INSPECTING BURNERS Check pilot flame pattern and bur...

Page 24: ...uld damage the pilot assembly 1 Shut off the unit including the pilot Allow the unit to cool for at least thirty minutes 2 Inspect burner pilot and primary air inlet holes on injector holder for dust...

Page 25: ...onnection loose at con trol valve 7 Thermocouple damaged 8 Control valve damaged REMEDY 1 Reconnect ignitor cable 2 Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry 3 Tighte...

Page 26: ...4 2 Replace gas regulator 1 Problem will stop after a few hours of operation 1 Turn control knob to LO position and let warm up for a minute 2 Operate burners until air is removed from line Have gas l...

Page 27: ...e 1 Foreign matter between control valve and burner 2 Gas leak See Warning statement at top of page 1 Thermostat sensing bulb needs to be repositioned REMEDY 1 Replace 9 volt batteries in receiver and...

Page 28: ...r fireplace has glass doors position sensing bulb directly behind door gap on right bottom side see Figure 53 4 The mounting clip must be a minimum of 3 from bottom of fireplace to prevent crimping of...

Page 29: ...ting If so contact DESA International s Technical Service Department at 1 800 DESA LOG 1 800 337 2564 You can also visit DESA International s technical services web site at www desatech com WIRING DIA...

Page 30: ...VGX24PT VGX30NT VGX30PT EX24NR EX24PR EX30NR EX30PR CGX3924NR CGX3924PR CGX3924NT CGX3924PT CGX3930NT CGX3930PT LGX3924NT LGX3924PT Log Set for Models VGX24NR VGX24PR VGX30NR VGX30PR VGX24NT VGX24PT...

Page 31: ...ed 1 3 108741 02 108742 02 108743 02 108744 02 108745 02 Log Right Front 1 4 108741 03 108742 03 108743 03 108744 03 108745 03 Log Crossover 1 5 108741 04 108742 04 108743 04 108744 04 108745 04 Log B...

Page 32: ...HERMOSTAT CONTROLLED VGX24NT VGX24PT VGX30NT VGX30PT CGX3924NT CGX3924PT CGX3930NT CGX3930PT ILLUSTRATED PARTS BREAKDOWN Thermostat Controlled VGX24NT VGX24PT VGX30NT VGX30PT CGX3924NT CGX3924PT CGX39...

Page 33: ...103780 03 103780 03 103780 03 Pilot Mounting Bracket 1 15 097159 04 097159 04 097159 04 097159 04 Piezo Ignitor 1 16 098271 10 098271 10 098271 10 098271 10 Ignitor Cable 1 17 099056 18 099056 21 0990...

Page 34: ...X30PR EX24NR EX24PR EX30NR EX30PR CGX3924NR CGX3924PR ILLUSTRATED PARTS BREAKDOWN Remote Ready Models VGX24NR VGX24PR VGX30NR VGX30PR EX24NR EX24PR EX30NR EX30PR CGX3924NR CGX3924PR O F F P I L O T O...

Page 35: ...nitor Cable 1 17 099056 18 099056 18 099056 21 099056 21 Burner Orifice Injector Back 1 18 101004 11 101004 11 101004 10 101004 10 Burner Orifice Injector Front 1 19 108692 01 108692 01 108692 01 1086...

Page 36: ...on visit www desatech com 36 ILLUSTRATED PARTS BREAKDOWN THERMOSTAT CONTROLLED LGX3924NT LGX3924PT ILLUSTRATED PARTS BREAKDOWN Thermostat Controlled LGX3924NT LGX3924PT 1 20 17 3 2 22 13 Natural Gas M...

Page 37: ...Nut 2 11 102394 02 102394 02 Control Bracket T Stat 1 12 099387 18 099387 18 Pilot Tube 1 13 108628 01 108628 01 Inlet Tube 1 14 103780 03 103780 03 Pilot Mounting Bracket 1 15 097159 04 097159 04 Pie...

Page 38: ...ith 1 8 NPT tap Fits 1 2 NPT pipe FIREPLACE HOOD Black GA6050 Brass GA6052 Antique Brass GA6053 For all models Helps deflect heat away from mantel or wall above fireplace Fits openings 28 to 48 wide R...

Page 39: ...d College Completed Graduate School 13 Age of Purchaser Under 20 20 29 30 39 40 49 50 59 60 or Over 14 Buyer s total annual household income Under 15 000 15 000 to 19 999 20 000 to 34 999 35 000 to 49...

Page 40: ...108114 For more information visit www desatech com For more information visit www desatech com 40 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 INTERNATIONAL Postage Required...

Page 41: ...______________________________________________________ _______________________________________________________________________________________________ _________________________________________________...

Page 42: ...INTERNATIONAL 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 www desatech com 108114 01 Rev C 07 01 NOT A UPC 108114 01...

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