Desa VTDMV18PA, VTDMV24PA, VTDMV24NA, VTDMV18NA installation manual See Wiring Diagram

Page 14

TROUBLESHOOTING

Continued

OBSERVED PROBLEM POSSIBLE CAUSE

REMEDY

ODS/pilot lights but flame goes out when control knob is re- leased

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.Pilot flame not touching thermocouple, which allows thermocouple to cool, causing 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

6.Thermocouple connection loose at control valve

7.Thermocouple damaged

8.Control valve damaged

1.Press in control knob fully

2.After ODS/pilot lights, keep control knob pressed in for 30 seconds

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

4.Fully open equipment shutoff valve

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

B)Clean ODS/pilot (see Cleaning and Maintenance, page 12) or replace ODS/ pilot assembly

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

7.Replace pilot assembly

8.Replace control valve

Burner does not light after ODS/

1. Inlet gas pressure is too low

1.

Contact local natural or

pilot is lit

2.

Burner orifice(s) clogged

 

propane/LP gas company

 

2.

Clean burner(s) (see Cleaning

 

 

 

 

and Maintenance, page 12) or

 

 

 

 

replace burner orifice(s)

 

3.

Burner orifice(s) diameter

3.

Replace burner orifice(s)

 

 

too small

4.

Put remote selector in ON

 

4.

Remote selector in OFF

 

 

position (Remote use only)

 

position

 

5.

Wire disconnected from gas

5.

See Wiring Diagram, page

 

 

control (Remote use only)

 

17)

 

 

 

 

Delayed ignition of burner

1. Manifold pressure is too

1.

Contact local natural or

 

 

low

 

propane/LP gas company

 

2.

Burner orifice(s) clogged

2.

Clean burner(s) (see Cleaning

 

 

 

 

and Maintenance, page 12)

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 12) or

 

 

 

 

replace burner orifice

 

2.

Damaged burner

2.

Replace damaged burner

 

3.

Gas regulator defective

3.

Replace gas regulator

14

www.desatech.com

114926-01B

Image 14
Contents What to do if YOU Smell GAS VTDMV24NA, VTDMV24PA VTDMV18NA and VTDMV18PATable of Contents Safety Information Local Codes High traffic areas Windy or drafty areasProduct Identification Product FeaturesInstallation UnpackingVenting Specifications for Installation and ClearancesFlue Opening Specifications InstallationInstallation Items Needed Installing ApplianceConnecting to GAS Supply Natural From Gas Meter 5 W.C.** to 10.5 W.C. Pressure KPa Checking GAS ConnectionsTest Pressures In Excess Of 1/2 Psig Propane/LPTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Placement of Loose EmbersPressure Testing Appliance Gas Connections Operating Appliance ON/OFF Series Model Ghrcb Inspecting BurnersPilot Flame Pattern Technical Service Cleaning MaintenanceService Hints Replacement PartsTroubleshooting Observed Problem Possible Cause RemedySee Wiring Diagram, Maintenance, Gas leak. See Warning statement at top Gas leak. See WarningStatement at top Wiring Diagram SpecificationsAccessories Illustrated Parts Breakdown VTDMV24NA, VTDMV24PA VTDMV18NA, VTDMV18PAParts List Limited Warranty Vented GAS LOG Appliances Warranty InformationKeep this Warranty