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Desa CSG3924NTA Owner's Operation And Installation Manual

Unvented vent-free
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UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
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
24" THERMOSTAT MODELS
CSG3924NTA AND CSG3924PTA

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  • Page 1 UNVENTED (VENT-FREE) GAS LOG HEATER OWNER’S OPERATION AND INSTALLATION MANUAL 24" THERMOSTAT MODELS CSG3924NTA AND CSG3924PTA 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 Cleaning and Maintenance ........ 20 Product Identification ........... 5 Troubleshooting ..........22 Local Codes............5 Optional Positioning of Thermostat Sensing Bulb ... 26 Unpacking............5 Specifications ............ 27 Product Features ..........6 Parts ..............27 Air For Combustion and Ventilation .....
  • Page 3 SAFETy Continued WARNING: This product con- WARNING: Do not use a tains and/or generates chemicals blower insert, heat exchanger known to the State of California insert or other accessory not ap- to cause cancer or birth defects proved for use with this heater. or other reproductive harm.
  • Page 4 SAFETy Continued 8. To prevent the creation of soot, follow the You must operate this heater instructions in Cleaning and Maintenance, with a fireplace screen in place. page 20. Make sure fireplace screen is 9. Before using furniture polish, wax, carpet closed before running heater.

  • Page 5: Product Identification

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

  • Page 6: Product Features

    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 Confined Space and Unconfined Space 3. Add the Btu/Hr of all fuel burning appliances in the space. The National Fuel Gas Code ANSI Z223.1/ NFPA 54 defines a confined space as a space Vent-free fireplace __________ Btu/Hr whose volume is less than 50 cubic feet per Gas water heater*...
  • Page 8 AIR FOR COMBUSTION AND VENTILATION Continued ceiling and one within 12" of the floor on the WARNING: If the area in which wall connecting the two spaces (see options the heater may be operated does 1 and 2, Figure 2). You can also remove door into adjoining room (see option 3, Figure 2).

  • 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 Note: When installing your gas logs into a manufactured firebox, follow firebox Use only the correct gas type (natural or pro- manufacturer’s instructions for minimum pane/LP) for your unit. If your gas supply is not clearances to combustible materials.
  • Page 11 INSTALLATION Continued Noncombustible Requirements for Material Distance (A) Safe Installation 12" or more Noncombustible material okay. Between 8" Install fireplace hood and 12" accessory (GA6050, GA6052 or GA6053, see Accessories, page 30). Less than 8" Noncombustible material must be extended to at least 8". See Between 8"...

  • Page 12: Safety Information

    INSTALLATION Continued MANTEL CLEARANCES In addition to meeting noncombustible mate- rial clearances, you must also meet required clearances between fireplace opening and Combustible mantel shelf. If you do not meet the clearances Material 14" listed below, you will need a hood. Min.
  • Page 13 INSTALLATION Continued IMPORTANT: Make sure the heater burners Flexible Gas Hose (if allowed by local are level. If heater is not level, heater will not codes) work properly. Avoid damage to thermostat Fitting bulb. Avoid nicks or sharp bends in thermostat bulb wire.
  • Page 14 INSTALLATION Continued CAUTION: Use only new, WARNING: For natural gas black iron or steel pipe. Inter- units, never connect heater to nally-tinned copper tubing may private (non-utility) gas wells. be used in certain areas. Check This gas is commonly known your local codes.
  • Page 15 INSTALLATION Continued PRESSURE TESTING GAS SUPPLY WARNING: Use pipe joint PIPING SYSTEM sealant that is resistant to liquid Test Pressures In Excess Of 1/2 PSIG petroleum (LP) gas. (3.5 kPa) 1. Disconnect appliance with its appliance We recommend that you install sediment trap main gas valve (control valve) and equip- in supply line as shown in Figure 13, page ment shutoff valve from gas supply piping.
  • Page 16 INSTALLATION Continued Pressure Testing Heater Gas INSTALLING LOGS Connections WARNING: Failure to posi- 1. Open equipment shutoff valve (see Figure 14, page 15). tion the parts in accordance 2. Open main gas valve located on or near with these diagrams or failure gas meter for natural gas or open pro- to use only parts specifically pane/LP supply tank valve.

  • Page 17: 2 Www.desatech.com

    INSTALLATION Continued 3. Place log #3 on left side of base and onto Log #5 alignment screw to right of rear burner (see Figure 18). Log #3 will wrap around Log #6 left end of rear burner. 4. Place log #4 onto two alignment screws to the rear of base (see Figure 19).

  • Page 18: Operation

    OPERATION FOR YOUR SAFETY LIGHTING READ BEFORE LIGHTING INSTRUCTIONS WARNING: If you do not fol- WARNING: low these instructions exactly, • If fireplace has glass doors, a fire or explosion may result never operate this heater with causing property damage, per- glass doors closed.

  • Page 19: Thermostat Control

    OPERATION Continued 9. To light the rear yellow flame burner, push 5. Turn control knob counterclockwise in and turn rear burner control knob coun- to the PILOT position. Press in control knob terclockwise to the ON position. for five (5) seconds (see Figure 22). 10.

  • Page 20: Inspecting Burners

    INSPECTING BURNERS Check pilot flame pattern and burner flame WARNING: If yellow tipping patterns often. occurs, your heater could pro- PILOT FLAME PATTERN duce increased levels of carbon Figure 25 shows a correct pilot flame pattern. monoxide. If burner flame pat- Figure 26 shows an incorrect pilot flame pat- terns show yellow tipping, follow tern.
  • Page 21 CLEANING AND MAINTENANCE Continued (see Figure 30). You may blow through a drink- WARNING: Failure to keep ing straw if compressed air is not available. the primary air opening(s) of Injector Holder Burner the burner(s) clean may result in Tube sooting and property damage.

  • Page 22: Troubleshooting

    TROUBLESHOOTING WARNING: Turn off and unplug 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 23 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 24 TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Yellow flame in front/middle 1. Not enough air 1. Check burner(s) for dirt burner during burner com- and debris. If found, clean bustion burner(s) (see Cleaning and Maintenance, page 20) 2. Gas regulator defective 2.
  • Page 25 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 26: Optional Positioning Of Thermostat Sensing Bulb

    OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB 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 Figure 33 - Adhesive-backed Mounting Clip to reposition the thermostat sensing bulb.

  • Page 27: Specifications

    • Inlet Gas Pressure (in. of water): Maximum 10.5" W.C., Minimum* 5" W.C. • Shipping Weight: 30 lbs. • Certified Standards: Z21.11.2-2000 * For purpose of input adjustment PARTS LOG MODELS CSG3924PTA, CSG3924NTA NO. PART NO. DESCRIPTION QTY. 110020-03 Log Set...
  • Page 28 PARTS THERMOSTAT-CONTROLLED MODELS CSG3924NTA AND CSG3924PTA www.desatech.com 123551-01D...
  • Page 29 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 30 of this manual. PART NO. DESCRIPTION Burner Carriage • • 110328-01 Front and Rear Burner Tube •...

  • Page 30: Replacement Parts

    • fireplace will not produce specified heat serial numbers of your heater ready. • for propane/LP units, propane/LP gas sup- You can also visit DESA Heating, LLC’s web ply may be low site at www.desatech.com. You may feel your gas pressure is too low. If so, contact your local natural or propane/LP gas supplier.
  • Page 31 NOTES ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ 123551-01D www.desatech.com...
  • Page 32 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 one (1) year on new products and 30 days on factory reconditioned products from the date of first purchase.

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Csg3924pt

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