Desa Tech CGN20TL, CGN30TL installation manual Trouble, Cleaning and Mainte

Page 23

TROUBLE-

 

 

OBSERVED

POSSIBLE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROBLEM

CAUSE

REMEDY

 

SHOOTING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When ignitor button

1. Gas supply turned off

1.

Turn on gas supply or

 

Continued

 

 

 

 

 

is pressed, there is

 

or manual shutoff

 

open manual shutoff

 

 

 

 

 

 

 

 

 

 

spark at ODS/pilot

 

valve closed

 

valve

 

 

 

 

but no ignition

2.

Control knob not in

2.

Turn control knob to

 

 

 

 

 

 

PILOT position

 

PILOT position

 

 

 

 

 

3.

Control knob not

3.

Press in control knob

 

 

 

 

 

 

pressed in while in

 

while in PILOT position

 

 

 

 

 

 

PILOT position

 

 

 

 

 

 

 

 

 

 

4.

Air in gas lines when

4.

Continue holding down

 

 

 

 

 

 

installed

 

control knob. Repeat

 

 

 

 

 

 

 

 

igniting operation until

 

 

 

 

 

 

 

 

air is removed

 

 

 

 

 

5.

ODS/pilot is clogged

5.

Clean ODS/pilot (see

 

 

 

 

 

 

 

 

Cleaning and Mainte-

 

 

 

 

 

 

 

 

nance, page 22) or

 

 

 

 

 

 

 

 

replace ODS/pilot

 

 

 

 

 

 

 

 

assembly

 

 

 

 

 

6.

Gas regulator setting is

6.

Replace gas regulator

 

 

 

 

 

 

not correct

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ODS/pilot lights but

1.

Control knob not fully

1.

Press in control knob

 

 

 

 

flame goes out when

 

pressed in

 

fully

 

 

 

 

control knob is

2.

Control knob not

2.

After ODS/pilot lights,

 

 

 

 

released

 

pressed in long enough

 

keep control knob

 

 

 

 

 

 

 

 

pressed in 30 seconds

 

 

 

 

 

3.

Safety interlock

3.

Wait one (1) minute for

 

 

 

 

 

 

system has been

 

safety interlock system to

 

 

 

 

 

 

triggered (Thermostat

 

reset. Repeat ignition

 

 

 

 

 

 

models only)

 

operation

 

 

 

 

 

4.

Manual shutoff valve

4.

Fully open manual shut-

 

 

 

 

 

 

not fully open

 

off valve

 

 

 

 

 

5.

Thermocouple connec-

5.

Hand tighten until snug,

 

 

 

 

 

 

tion loose at control

 

then tighten 1/4 turn more

 

 

 

 

 

 

valve

 

 

 

 

 

 

 

 

 

 

6.

Pilot flame not touch-

6.

A) Contact local natural

 

 

 

 

 

 

ing thermocouple,

 

gas company

 

 

 

 

 

 

which allows thermo-

 

B) Clean ODS/pilot (see

 

 

 

 

 

 

couple to cool, causing

 

Cleaning and Mainte-

 

 

 

 

 

 

pilot flame to go out.

 

nance, page 22) or

 

 

 

 

 

 

This problem could be

 

replace ODS/pilot

 

 

 

 

 

 

caused by one or both

 

assembly

 

 

 

 

 

 

of the following:

 

 

 

 

 

 

 

 

 

 

 

A) Low gas pressure

 

 

 

 

 

 

 

 

 

 

 

B) Dirty or partially

 

 

 

 

 

 

 

 

 

 

 

clogged ODS/pilot

 

 

 

 

 

 

 

 

 

 

7.

Thermocouple dam-

7.

Replace thermocouple

 

 

 

 

 

 

aged

 

 

 

 

 

 

 

 

 

 

8.

Control valve damaged

8.

Replace control valve

 

 

 

 

 

 

 

 

Continued

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

 

 

 

 

 

 

 

103873

Image 23
Contents What to do if YOU Smell GAS OWNER’S Operation and Installation ManualSafety Information ContentsIf you smell gas Piezo Ignition System Local Codes Unpacking Product FeaturesSafety Device Product IdentificationProviding Adequate Ventilation Fresh AIR ForVentilation Determining if You Have a Confined or Unconfined Space Fresh AIRDetermining FRESH-AIR Flow for Heater Location Ventilation Air From Inside Building Fresh AIR for Combustion and VentilationVentilation AIR Ventilation Air from Outdoors Ventilation Air From OutdoorsLocating Heater Installing to WallInstallation Items Check GAS TypeAttaching Thermostat Sensing Bulb Thermostat Sensing BulbLocating Thermostat Sensing Bulb Bracket Attaching Mounting Bracket To Wall Marking Screw LocationsMaintain minimum clearances shown in . If you can, provide Greater clearances from floor and joining wallPlacing Heater On Mounting Bracket Installing Bottom Mounting ScrewsConnecting to GAS Supply Checking GAS ConnectingTo GAS SupplyChecking Pressure Testing Heater GAS ConnectionsOperating Heater For Your Safety Read Before LightingOperating Heater Shutting Off Burner Only pilot stays lit Shutting Off HeaterPilot Flame Pattern Inspecting BurnerCorrect Burner Flame Pattern Burner Flame PatternCabinet Trouble ShootingODS/PILOT and Burner Trouble Cleaning and MainteTROUBLE- Shooting Ing and MaintenanceBuilding If you smell gasShut off gas supply Do not try to light any appliance20,000 Btu/Hr Models Technical ServiceService Hints Service Publications Parts Centrals Parts Under WarrantyCGN20T CGN20TL CGN30T CGN30TL Description QTY Parts ListValve GA5010 Accessories103873 Keep this Warranty Warranty Information