Desa GVB50N, GVB35N Trouble, Shooting, Continued, Cleaning and Mainte, ing and Maintenance

Page 27
Cleaning and Mainte-

TROUBLE-

OBSERVED

POSSIBLE

 

 

 

 

 

 

 

 

 

PROBLEM

CAUSE

 

 

 

REMEDY

 

 

 

SHOOTING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pilot lights but flame

1.

Manual shutoff

valve

1.

Fully open manual shut-

Continued

goes out when

 

not fully open.

 

 

 

off valve.

 

 

 

 

control knob is

2.

Control knob not fully

2.

Press

in control knob

 

released.

 

pressed in.

 

 

 

 

fully.

 

 

 

 

 

 

3.

Control

knob

not

3.

After pilot lights, keep

 

 

 

pressed in long enough.

 

control knob pressed in

 

 

4.

Safety interlock system

 

30 seconds.

 

 

 

 

 

4.

Wait

one minute

for

 

 

 

has been triggered.

 

 

safety interlock system

 

 

5.

Thermocouple connec-

 

to reset. Repeat ignition.

 

 

5.

Hand tighten until snug,

 

 

 

tion

loose at control

 

then tighten

1/4

turn

 

 

 

valve.

 

 

 

 

more.

 

 

 

 

 

 

6.

Pilot flame not touching

6.

A) Contact

qualified

 

 

 

thermocouple,

which

 

service person to prop-

 

 

 

allows thermocouple to

 

erly adjust pilot flame

 

 

 

cool,

causing

pilot

 

B) Contact local natural

 

 

 

flame to go out. This

 

gas company.

 

 

 

 

 

 

problem

could

be

 

C) Clean pilot (see

 

 

 

 

caused by any or all of

 

Cleaning and Mainte-

 

 

 

the following:

 

 

 

nance, page 25) or

 

 

 

 

A) Improperly adjusted

 

replace pilot assembly.

 

 

 

pilot flame

 

 

 

 

 

 

 

 

 

 

 

B) Low gas pressure

 

 

 

 

 

 

 

 

 

C) Dirty or partially

 

 

 

 

 

 

 

 

 

clogged pilot

 

 

 

 

 

 

 

 

 

 

7.

Thermocouple

dam-

7.

Replace thermocouple.

 

 

 

aged.

 

 

 

 

 

 

 

 

 

 

 

 

8.

Control valve damaged.

8.

Replace control valve.

 

 

 

 

 

 

 

 

 

Burner does not light

1.

Safety interlock system

1.

Fully

depress

control

 

after pilot is lit.

 

has been inadvertently

 

knob

in any

 

position

 

 

 

triggered.

 

 

 

 

other than pilot and re-

 

 

 

 

 

 

 

 

 

lease. Wait one minute

 

 

 

 

 

 

 

 

 

for safety interlock sys-

 

 

 

 

 

 

 

 

 

tem to reset. Repeat igni-

 

 

2.

Burner

orifice

is

 

tion.

 

 

 

 

 

 

2.

Clean burner (see Clean-

 

 

 

clogged.

 

 

 

 

ing and Maintenance,

 

 

 

 

 

 

 

 

 

page

25) or

replace

 

 

3.

Burner orifice diameter

 

burner orifice.

 

 

 

 

 

3.

Replace burner orifice.

 

 

 

is too small.

 

 

 

 

 

 

 

 

 

 

4.

Inlet gas pressure is too

4.

Contact local

natural

 

 

 

low.

 

 

 

 

 

gas company.

 

 

 

 

 

 

 

 

 

 

 

Delayed ignition of

1.

Manifold pressure is too

1.

Contact local

natural

 

 

low.

 

 

 

 

 

gas company.

 

 

 

 

burner.

 

 

 

 

 

 

 

 

 

 

2.

Burner

orifice

is

2.

Clean

burner

(see

 

 

 

 

 

clogged.

 

 

 

 

Cleaning and Mainte-

 

 

 

 

 

 

 

 

 

nance, page 25) or re-

 

 

 

 

 

 

 

 

 

place burner orifice.

Continued

100353

27

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Contents Save this manual for future reference OWNER’S OPERATION AND INSTALLATION MANUALVENTED NATURAL GAS HEATERS Models GVB35N and GVB50NCONTENTS SECTIONPAGE DANGER SAFETYINFORMATION WARNINGSSAFETY INFORMATION WARNINGS ContinuedContinued 100353 PRODUCT IDENTIFICATIONFigure 1 - Vented Natural Gas Heater Figure 2 - Vented Natural Gas Heater, Rear ViewUNPACKING FEATURESINSTALLING LOCAL CODESIf you install the heater in a home garage INSTALLING HEATERNever install the heater For convenience and efficiency, install heaterINSTALLING HEATER ContinuedVENTING HEATER Figure 4 - Improper Venting Systems INSTALLING HEATERContinued VENTING HEATER continuedVent Types INSTALLING HEATERContinued VENTING HEATER continued Proper Size VentContinued INSTALLINGCONNECTING TO GAS SUPPLY HEATERINSTALLING HEATER For purposes of input adjustmentContinued HEATER INSTALLINGPressure Testing Gas Supply Piping System Pressure Testing Heater Gas ConnectionsContinued INSTALLING HEATERINSTALLING GLASS PANEL Figure 9 - Removing Lower Front Access Panel8.Repeat steps 4 through 7 for all glass panels INSTALLINGHEATER ContinuedFRESH AIR FOR COMBUSTION AND VENTILATION DANGERCarbon monoxide poisoning may lead to death Continued COMBUSTIONVENTILATION FRESH AIR FORDANGER FRESH AIR FORCOMBUSTION VENTILATIONContinued COMBUSTIONVENTILATION FRESH AIR FOROPERATING HEATER FOR YOUR SAFETY READ BEFORE LIGHTINGLIGHTING INSTRUCTIONS Figure 17 - Viewing Pilot OPERATING HEATERContinued ContinuedTO TURN OFF GAS TO APPLIANCE MANUAL LIGHTING PROCEDUREOPERATING HEATER ContinuedContinued INSPECTING PILOT AND BURNER FLAMEPILOT FLAME PATTERN BURNER FLAME PATTERNContinued INSPECTING PILOT AND BURNER FLAMEPILOT CLEANING AND MAINTENANCECABINET COMBUSTION CHAMBER AND BURNERTROUBLE SHOOTINGand Maintenance, page TROUBLE Cleaning and Mainteing and Maintenance Cleaning and MainteCleaning TROUBLE- SHOOTINGing and Maintenance Maintenance, pageContinued ing and MaintenanceTROUBLE SHOOTINGRemoving Control Valve and Burner Tube SERVICE PROCEDURESContinued SERVICE PROCEDURESContinued Removing BurnerSERVICE PROCEDURES ContinuedChanging Burner Orifice TECHNICAL SERVICE SERVICE HINTSSPECIFICATIONS CENTRALS REPLACEMENTORDERING PARTSACCESSORIES BLOWER KIT - PART NUMBER GA6010MANUAL SHUTOFF VALVE - GA5010 Burner PARTS LISTAssembly ILLUSTRATEDGVB35N PARTS LIST Burner AssemblyPART NUMBER FOR GVB50Nmanual ILLUSTRATED PARTS LIST Cabinet AssemblyPage DESA WARRANTY INFORMATION
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