Desa 10542 installation manual Replace burner orifice

Page 21

TROUBLESHOOTING

Continued

OBSERVED PROBLEM POSSIBLE CAUSE

REMEDY

ODS/pilot lights but flame goes out when control knob is released

1.Control knob not fully pressed in

2.Control knob not pressed in long enough

3.Safety interlock system has been triggered

4.Equipment shutoff valve not fully open

5.Thermocouple connection loose at control valve

6.Pilot flame not touching ther- mocouple, which allows thermocouple to cool, caus- ing pilot flame to go out. This problem could be caused by one or both of the following:

A)Low gas pressure

B)Dirty or partially clogged ODS/pilot

7.Thermocouple damaged

8.Control valve damaged

1.Press in control knob fully

2.After ODS/pilot lights, keep con- trol knob pressed in 30 seconds

3.Wait one minute for safety in- terlock system to reset. Repeat ignition operation

4.Fully open equipment shutoff valve

5.Hand tighten until snug, then tighten 1/4 turn more

6.A) Contact local natural or propane/LP gas company

B)Clean ODS/pilot (see Cleaning and Maintenance, page 19) or replace ODS/pilot assembly

7.Replace pilot assembly

8.Replace control valve

Burner does not light after ODS/

1. Burner orifice is clogged

1.

Clean burner (see Cleaning

pilot is lit

 

 

 

and Maintenance, page 19) or

 

 

 

 

replace burner orifice

 

2.

Inlet gas pressure is too low

2.

Contact local natural or pro-

 

 

 

 

pane/LP gas company

 

 

 

 

Delayed ignition of burner

1. Manifold pressure is too low

1.

Contact local natural or pro-

 

 

 

 

pane/LP gas company

 

2.

Burner orifice is clogged

2.

Clean burner (see Cleaning

 

 

 

 

and Maintenance, page 19) or

 

 

 

 

replace burner orifice

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 19) or

 

 

 

 

replace burner orifice

 

2.

Burner damaged

2.

Replace burner

 

3.

Gas regulator defective

3.

Replace gas regulator

113680-01A

www.desatech.com

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Contents What to do if YOU Smell GAS Table of Contents Safety Information Local Codes Product FeaturesProduct Identification UnpackingProviding Adequate Ventilation AIR for Combustion VentilationUnusually Tight Construction Confined and Unconfined SpaceDetermining if You Have a Confined or Unconfined Space Determining FRESH-AIR Flow for Heater LocationVentilation AIR InstallationCheck GAS Type Ventilation Air From Inside BuildingLocating Heater Installation ItemsInstalling Heater to Wall 20,000 Btu/Hr Model 30,000 Btu/Hr Model10,000 Btu/Hr Model Attaching To Wall Anchor MethodMounting Base Feet to Floor Where required by local code Installing Bottom Mounting ScrewsMounting Heater to Floor with Optional Floor KIT Placing Heater On Mounting BracketTypical Inlet Pipe Diameters Connecting to GAS SupplyPropane/LP Natural GasTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Pressure Testing Heater GAS ConnectionsManual Control Models For Your Safety Read Before Lighting Operating HeaterLighting Instructions To Turn OFF GAS To Appliance Manual Lighting ProcedureShutting Off Heater Shutting Off Burner Only pilot stays litThermostat Control Operation Inpecting Heater Pilot Flame PatternBurner Flame Pattern ODS/PILOT and Burner Cleaning MaintenanceBurner Pilot AIR Inlet CabinetObserved Problem Possible Cause Remedy TroubleshootingReplace burner orifice See Cleaning and Mainte Statement above Gas leak. See Warning10548 10546 10542/10544 Specifications10549 10547 10545 10543Technical Service Service HintsService Publications Replacement Parts Parts Under Warranty10,000 BTU/HR Manual Control Models 10542 Illustrated Parts Breakdown10,000 BTU/HR Manual Control Models Parts List19-1 19-2 19-113 10,000, 20,000, and 30,000 BTU/HR Termostat Models Equipment Shutoff Valve GA5010 AccessoriesFAN Kits GA3210T Base KIT GA4550Parts Centrals Warranty Information Keep this WarrantyLimited Warranty VENT-FREE Residential GAS Heaters

10542 specifications

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