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123551-01D

22

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.

POSSIBLE CAUSE

1. Ignitor  electrode  not  con-

nected to ignitor cable

2. Ignitor  cable  pinched  or 

wet

3. Piezo ignitor nut is loose

4. Broken ignitor cable

5. Bad piezo ignitor

6. Ignitor electrode broken
7. Ignitor electrode positioned 

wrong

1. Gas  supply  turned  off  or 

equipment  shutoff  valve 

closed

2. Control knob not in PILOT 

position

3. Control knob not pressed in 

while in PILOT position

4. Air  in  gas  lines  when  in-

stalled

5. Depleted gas supply (pro-

pane/LP only)

6. ODS/pilot is clogged

7. Gas regulator setting is not 

correct

OBSERVED PROBLEM

When ignitor button is pressed, 

there  is  no  spark  at  ODS/
pilot

When ignitor button is pressed, 

there is spark at ODS/pilot but 
no ignition

REMEDY

1. Reconnect ignitor cable

2. Free ignitor cable if pinched 

by  any  metal  or  tubing. 
Keep ignitor cable dry

3. Tighten  nut  holding  piezo 

ignitor to base panel of log 
set.  Nut  is  located  behind 
base panel

4. Replace ignitor cable

5. Replace piezo ignitor

6. Replace pilot assembly
7. Replace pilot assembly

1. Turn on gas supply or open 

equipment shutoff valve

2. Turn control knob to PILOT 

position

3. Press in control knob while 

in PILOT position

4. Continue  holding  down 

control knob. Repeat ignit-
ing  operation  until  air  is 
removed

5. Contact  local  propane/LP 

gas company

6. Clean  ODS/pilot  (see 

Cleaning and Maintenance,

 

page 20) or replace ODS/
pilot assembly

7. Replace gas regulator

Summary of Contents for CSG3924NTA

Page 1: ...y appliance Do not touch any electrical switch do not use any phone in your building Immediatelycallyourgassupplierfromaneighbor s phone Follow the gas supplier s instructions If you cannot reach your...

Page 2: ...or these installations in accordance with ANSI Z21 11 2 Exception Do not install this appliance in a factory built fireplace that includes instructions stating it has not been test ed or should not be...

Page 3: ...However the odor added to the gas can fade Gas may be present even though no odor exists Make certain you read and understand all warnings Keep this manual for reference It is your guide to safe and p...

Page 4: ...k of less than 100 lb capacity 18 Provide adequate clearances around air openings You must operate this heater with a fireplace screen in place Make sure fireplace screen is closed before running heat...

Page 5: ...he 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 pro...

Page 6: ...home needs to breathe Fresh air must enter your home All fuel burning ap pliances need fresh air for proper combustion and ventilation Exhaust fans fireplaces clothes dryers and fuel burning applianc...

Page 7: ...etermine the maximum Btu Hr the space can support _________ volume of space x 20 Maxi mum Btu Hr the space can support Example 2 560 cu ft volume of space x 20 51 200 maximum Btu Hr the space can supp...

Page 8: ...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...

Page 9: ...eated Adirtychimneyfluemay createanddistributesootwithin the house Inspect chimney flue and firebox for damage If dam aged repair flue before operat ing heater WARNING Seal any fresh air vents or ash...

Page 10: ...tinued Note When installing your gas logs into a manufactured firebox follow firebox manufacturer s instructions for minimum clearances to combustible materials B Clearances from top of fireplace open...

Page 11: ...al Slate Marble Tile etc Above Fireplace Figure 6 Minimum Mantel Clearances Without Using Hood Minimum Noncombustible Material Minimum Noncombustible Material Height Distances to Underside of Mantel T...

Page 12: ...t meet the clearances listed below you will need a hood Determining Minimum Mantel Clearance If you meet minimum clearance between man tel shelf and top of fireplace opening a hood is not required see...

Page 13: ...r base and logs front to back and side to side in fireplace 6 Carefully remove logs without moving heater base 7 Mark screw locations through one hole on each side of the mounting bracket see Figure 1...

Page 14: ...gas is commonly known as wellhead gas Installation Items Needed Before installing heater make sure you have the items listed below external regulator supplied by installer piping check local codes se...

Page 15: ...ing Gas Supply Piping System Test Pressures In Excess Of 1 2 PSIG 3 5 kPa 1 Disconnect appliance with its appliance main gas valve control valve and equip ment shutoff valve from gas supply piping Pre...

Page 16: ...tion INSTALLING LOGS WARNING Failure to posi tion the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or perso...

Page 17: ...n log 1 ember bed and rest back of log 6 on back log 4 see Figure 20 Figure 18 Installing Log 2 Right and Log 3 Left Figure 19 Installing Log 4 Figure 20 Installing Log 5 Right and Log 6 Left Log 5 Lo...

Page 18: ...Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information in column 1 If you don t smell gas go to the next step Operation FOR YOUR SAFETY READ BEFORE LIGHTI...

Page 19: ...tor Electrode Figure 24 Pilot Natural Ignitor Electrode Pilot Burner Thermocouple Thermocouple 9 To light the rear yellow flame burner push in and turn rear burner control knob coun terclockwise to th...

Page 20: ...r flame pat ternsshowyellowtipping follow instructionsbelow Yellowflame on rear burner is normal NOTICE Do not mistake orange flames with yellow tipping Dirt orotherfineparticlesareburned by heater ca...

Page 21: ...ted at the end of burner tubes 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 holders 6...

Page 22: ...en in stalled 5 Depleted gas supply pro pane LP only 6 ODS pilot is clogged 7 Gas regulator setting is not correct OBSERVED PROBLEM Whenignitorbuttonispressed there is no spark at ODS pilot Whenignito...

Page 23: ...qualified service person 1 Contact local natural or propane LP gas company 2 Clean burner s see Clean ing and Maintenance page 20 or replace burner orifice s 3 Contact qualified service person 1 Clea...

Page 24: ...removed from line Have gas line checked by local natural or propane LP gas company 3 Observeminimuminstallation clearances see page 8 4 Clean burners see Clean ing and Maintenance page 20 1 Turn heat...

Page 25: ...Locate and correct all leaks see Checking Gas Con nections page 16 1 Open window and or door for ventilation 2 Contact local natural or propane LP gas company 3 Clean ODS pilot see Cleaning and Mainte...

Page 26: ...he mounting bracket This location allows the thermostat to keep the room temperature at an ideal comfort level for most fireplace applications For positioning the thermostat sensing bulb elsewhere an...

Page 27: ...Piezo Manifold Pressure 3 W C 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 C...

Page 28: ...www desatech com 123551 01D 28 PARTS Thermostat Controlled Models CSG3924NTA AND CSG3924PTA 1 16 17 2 18 12 28 24 27 27 27 27 27 27 8 8 7 9 13 5 6 19 20 4 14 10 25 3 26 22 15 21 11 23...

Page 29: ...097159 04 Piezo Ignitor 1 15 098271 10 Ignitor Cable 1 16 099056 18 Burner Orifice Injector Back 1 099056 21 Burner Orifice Injector Back 1 17 101004 02 Burner Orifice Injector Front 1 101004 18 Burn...

Page 30: ...r was malfunctioning purchase date Service Hints When Gas Pressure Is Too Low pilot will not stay lit burners will have delayed ignition fireplace will not produce specified heat for propane LP units...

Page 31: ...__ ______________________________________________________ ______________________________________________________ ______________________________________________________ ________________________________...

Page 32: ...proved by DESA Heating LLC Warranty parts must be obtained through authorized dealers of this prod uct and or DESA Heating LLC who will provide original factory replacement parts Failure to use origin...

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