Service Procedures

Desa GVC50PA, GVC35PA, GVC65PA Service Procedures, Removing Control Valve and Burner Tube

Page 28

Removing Control Valve and Burner Tube

WARNING

Turn off and unplug heater and let cool before servicing. Unless you need gas supply for testing, shut off manual shutoff valve before servicing. Only a qualified service per- son should service and repair heater and venting system.

1.	Shut off gas supply to
	heater.
2.	Remove lower front
	access panel on heater.
3.	Disconnect burner tube
	from orifice holder (see
	Figure 18).
4.	Remove pilot gas line
	from control valve (see
	Figure 18).
5.	Disconnect wire connec-
	tors from thermocouple
	interrupter (see Figure
	18).
6.	Remove thermocouple
	and thermocouple inter-
	rupter from control valve.
7.	Remove cotter pin from
	control valve. This
	releases the control rod
	from valve (see Figure
	18).
8.	Remove the two mounting
	screws from control valve
	mounting bracket (see
	Figure 18).
9.	Remove assembly from
	the rear of heater. Pull
	burner tube through hole
	in combustion chamber.
10. To reinstall, reverse above
	steps. Turn on gas to

Control Rod

Control Valve	Control Valve
Bracket

Burner

Tube

Orifice

Holder

Thermocouple

Interrupter

Thermocouple

Cotter Pin

Mounting

Screw

Wire Connector

Pilot Gas Line

heater and check for gas

leaks. Apply a mixture of

liquid soap and water to

all joints. Bubbles forming

show a leak. Correct all

leaks at once.

11. Replace lower front

access panel.

Wire Connector

Figure 18 - Removing Control Valve and Burner Tube

100748

Image 28

Contents

For Your Safety OWNER’S Operation and Installation ManualWhat to do if YOU Smell GAS Contents Safety InformationElectrical shock, and carbon monoxide poisoning Carbon monoxide poisoning may lead to deathSafety Information Product IdentificationFeatures Installing HeaterLocal Codes UnpackingInstalling Heater Locating HeaterVenting Heater Venting Heater Do not vent heater in any of the following ways see FigureVenting Heater Proper Size Vent Installing Connecting to GAS SupplyQualified service person must connect heater to gas Supply. Follow all local codesGas Connection Checking GAS Connections Test all gas piping and connections for leaks after installIng or servicing. Correct all leaks at once Fresh AIR for Combustion and Ventilation Combustion VentilationDetermining FRESH-AIR Flow for Heater Location Draft Hood Spillage TestFresh AIR for Ventilation Air from OutdoorsConfined area has an air volume of less than 50 cubic 15 to make sure fresh air ventilation is adequateOperating Heater For Your Safety Read Before LightingLighting Instructions Viewing Pilot Manual Lighting Procedure Blower OperationTo Turn OFF GAS to Appliance Shutting Off HeaterPilot Flame Pattern Inspecting Pilot and Burner FlameBurner Flame Pattern Correct Burner Flame Pattern Cleaning Maintenance Trouble Shooting Unless you need gas supply for testing, shut off manual Shutoff valve before servicing. Only a qualified service Turn off and unplug heater and let cool before servicingProblem Cause TroubleObserved Possible Problem Cause Remedy TROUBLE- ShootingStatement at top Connections,Service Procedures Removing Control Valve and Burner TubeRemoving Burner Wiring DiagramBlower Changing Burner OrificeService AccessoriesTechnical HintsOrdering Replacement Parts Under WarrantyParts Not Under Warranty PartsIllustrated Parts List Cabinet AssemblyBurner Assembly Parts List Warranty Information Limited Warranty Vanguard Vented Propane GAS Heaters

Desa GVC50PA, GVC35PA, GVC65PA Service Procedures, Removing Control Valve and Burner Tube

SERVICE PROCEDURES

Removing Control Valve and Burner Tube

steps. Turn on gas to

Figure 18 - Removing Control Valve and Burner Tube