A.O. Smith HW 610 User Manual

Page 51

CHECKING HONEYWELL S8600H OR S-8610M

INTERMITTENT IGNITION CONTROLS

NO SPARK AT PILOT BURNER BUT PILOT WILL NOT LIGHT

Turn off gas supply.

Is there a good connection between terminals?

Is module securely attached to appliance for good ground

connection?

Is voltage (24VAC) across transformer positive terminal and

GND with "call for heat"?

Is voltage (24VAC) across ignition module terminals 24 Volt and

GND on "call for heater"?
NOTE: (For LP models only) Pilot Valve will be de-energized

if module goes into lockout condition. Reset system by turning

electrical power off or by turning system controller down below

"call for heat". Wait one minute then turn system on.

Turn on gas supply and/or

power supply.

Turn off power supply.

Is high voltage cable assembly firmly plugged into module?
Is pilot ground wire firmly attached to the pilot assembly and

GND terminal on module?

Are high voltage cable and ground wire in good condition (not

brittle, burnt or cracked)?

Make sure pilot flame spreader (hood) is the closest metal to

the electrode to prevent the spark from shorting out to other metal

parts (pilot screen, pilot shield, etc).
High voltage cable must not touch metal surfaces or current

carrying wires.

Is there a 7/64" spark gap between the tip (edge) of the hood and

electrode, and is the gap located in the pilot gas stream?

Is the ceramic insulator surrounding the electrode in good

condition (not cracked or broken)?

Replace pilot burner assembly.

YES

Check the circuit providing

24 VAC.

Replace ignition module.

Securely connect cable

and/or ground wire.

Replace pilot burner

and/or ground wire.

Carefully bend down-

wards top of ground

strap to achieve

1/8” spark gap.

Replace ignition module.

Fix connection and/or

tighten module to the

appliance.

YES