Desa GVB35N, GVB50N installation manual Trouble, Shooting, and Maintenance, page

Page 26
TROUBLE-

TROUBLE-

WARNING

SHOOTING

Turn off and unplug heater and let cool before servicing.

Note: All troubleshooting

Unless you need gas supply for testing, shut off manual

shutoff valve before servicing. Only a qualified service

items are listed in order of

person should service and repair heater and venting

operation.

system.

 

 

 

 

 

 

 

 

CAUTION

 

 

 

 

 

 

 

 

 

Never use a wire, needle, or similar object to clean pilot.

 

 

 

 

 

 

 

This can damage pilot.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OBSERVED

POSSIBLE

 

 

 

 

 

 

 

PROBLEM

CAUSE

REMEDY

 

 

 

 

 

 

 

 

 

 

 

 

When ignitor button is

1.

Incorrect spark gap.

1.

Adjust spark gap to 1/16".

 

 

pressed, there is no

2.

Ignitor electrode posi-

2.

Replace ignitor.

 

 

spark at pilot.

 

tioned wrong.

 

 

 

 

 

 

 

 

 

 

3.

Ignitor electrode broken.

3.

Replace ignitor.

 

 

 

 

 

4.

Ignitor electrode not con-

4.

Reconnect ignitor cable.

 

 

 

 

 

 

nected to ignitor cable.

 

 

 

 

 

 

 

 

 

 

5.

Ignitor cable pinched or

5.

Free ignitor cable if

 

 

 

 

 

 

wet.

 

pinched by any metal or

 

 

 

 

 

 

 

 

tubing. Keep ignitor

 

 

 

 

 

 

 

 

cable dry.

 

 

 

 

 

6.

Piezo ignitor nut is loose.

6.

Tighten nut holding piezo

 

 

 

 

 

 

 

 

ignitor to heater cabinet.

 

 

 

 

 

 

 

 

Nut is located inside

 

 

 

 

 

 

 

 

heater cabinet at top.

 

 

 

 

 

7.

Broken or frayed ignitor

7.

Replace ignitor cable.

 

 

 

 

 

 

cable.

 

 

 

 

 

 

 

 

 

 

8.

Loose ignitor cable.

8.

Reconnect ignitor cable.

 

 

 

 

 

9.

Bad piezo ignitor.

9.

Replace piezo ignitor.

 

 

 

 

 

 

 

 

 

 

When ignitor button is

1. Gas supply turned off or

1.

Turn on gas supply or

 

 

pressed, there is spark

 

manual shutoff valve

 

open manual shutoff

 

 

at pilot but no igni-

 

closed.

 

valve.

 

 

tion.

2.

Control knob not in PI-

2.

Turn control knob to PI-

 

 

 

 

 

 

LOT position.

 

LOT position.

 

 

 

 

 

3.

Control knob not pressed

3.

Press in control knob

 

 

 

 

 

 

in while in PILOT posi-

 

while in PILOT position.

 

 

 

 

 

 

tion.

 

 

 

 

 

 

 

 

 

 

4.

Air in gas lines when in-

4.

Continue holding down

 

 

 

 

 

 

stalled.

 

control knob. Repeat ig-

 

 

 

 

 

 

 

 

niting operation until air

 

 

 

 

 

 

 

 

is removed.

 

 

 

 

 

5.

Pilot is clogged.

5.

Clean pilot (see Cleaning

 

 

 

 

 

 

 

 

and Maintenance, page

 

 

 

 

 

 

 

 

25) or replace pilot as-

 

 

 

 

 

 

 

 

sembly.

 

 

 

 

 

6.

Gas regulator setting is

6.

Replace control valve.

 

 

 

 

 

 

not correct.

 

 

 

 

 

26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100353

Image 26
Contents Models GVB35N and GVB50N OWNER’S OPERATION AND INSTALLATION MANUALVENTED NATURAL GAS HEATERS Save this manual for future referencePAGE CONTENTSSECTION WARNINGS SAFETYINFORMATION DANGERContinued SAFETY INFORMATIONWARNINGS Continued Figure 2 - Vented Natural Gas Heater, Rear View PRODUCT IDENTIFICATIONFigure 1 - Vented Natural Gas Heater 100353LOCAL CODES FEATURESINSTALLING UNPACKINGFor convenience and efficiency, install heater INSTALLING HEATERNever install the heater If you install the heater in a home garageVENTING HEATER INSTALLING HEATERContinued VENTING HEATER continued INSTALLING HEATERContinued Figure 4 - Improper Venting SystemsVENTING HEATER continued Proper Size Vent INSTALLING HEATERContinued Vent TypesHEATER INSTALLINGCONNECTING TO GAS SUPPLY ContinuedContinued INSTALLING HEATERFor purposes of input adjustment Pressure Testing Heater Gas Connections INSTALLINGPressure Testing Gas Supply Piping System HEATERFigure 9 - Removing Lower Front Access Panel INSTALLING HEATERINSTALLING GLASS PANEL ContinuedContinued INSTALLINGHEATER 8.Repeat steps 4 through 7 for all glass panelsCarbon monoxide poisoning may lead to death FRESH AIR FOR COMBUSTION AND VENTILATIONDANGER FRESH AIR FOR COMBUSTIONVENTILATION ContinuedVENTILATION FRESH AIR FORCOMBUSTION DANGERFRESH AIR FOR COMBUSTIONVENTILATION ContinuedLIGHTING INSTRUCTIONS OPERATING HEATERFOR YOUR SAFETY READ BEFORE LIGHTING Continued OPERATING HEATERContinued Figure 17 - Viewing PilotContinued MANUAL LIGHTING PROCEDUREOPERATING HEATER TO TURN OFF GAS TO APPLIANCEBURNER FLAME PATTERN INSPECTING PILOT AND BURNER FLAMEPILOT FLAME PATTERN ContinuedINSPECTING PILOT AND BURNER FLAME ContinuedCOMBUSTION CHAMBER AND BURNER CLEANING AND MAINTENANCECABINET PILOTand Maintenance, page TROUBLESHOOTING Cleaning and Mainte Cleaning and Mainteing and Maintenance TROUBLEMaintenance, page TROUBLE- SHOOTINGing and Maintenance CleaningSHOOTING ing and MaintenanceTROUBLE ContinuedSERVICE PROCEDURES Removing Control Valve and Burner TubeRemoving Burner SERVICE PROCEDURESContinued ContinuedChanging Burner Orifice SERVICE PROCEDURESContinued SPECIFICATIONS TECHNICAL SERVICESERVICE HINTS PARTS REPLACEMENTORDERING CENTRALSMANUAL SHUTOFF VALVE - GA5010 ACCESSORIESBLOWER KIT - PART NUMBER GA6010 ILLUSTRATED PARTS LISTAssembly BurnerGVB50N PARTS LIST Burner AssemblyPART NUMBER FOR GVB35NILLUSTRATED PARTS LIST Cabinet Assembly manualPage WARRANTY INFORMATION DESA