A.O. Smith HW 610 - Manual (Page 48)

48
CHECKING HONEYWELL S-8600H OR S-8610M
INTERMITTENT IGNITION CONTROLS
Turn off gas supply.
Is voltage (24 Vac) across the 24 V terminals
on module during “Call for heat”?
Turn off power supply.
Is ignition cable firmly plugged into pilot
assembly and module?
Is ground wire firmly attached to pilot assembly and GND terminal
on module?
Ensure ground strap is the closest metal to the igniter/sensor
rod (electrode) to prevent the spark from shorting out to other
metal parts (pilot screen, pilot shield, etc.).
Ignition cable must not touch metal surfaces or current
carrying wires.
Is there a 1/8” gap between ground strap and electrode?
Is the ceramic insulator surrounding the electrode
cracked or broken?
Replace pilot burner assembly.
Replace ignition module.
Turn on gas supply.
Turn on power supply.
Securely connect cable
and/or ground wire.
Carefully bend downward
top of ground strap
to achieve 1/8”
spark gap.
Replace Ignition
Module.
YES
NO
YES
YES
NO
NO
NO
Is voltage (24 Vac) across the PV & MV/PV terminals on
“call for heat”?
YES
NO
NOTE: S8610M will automatically reset every 5 minutes. S8600H
pilot valve will be de-energized if module goes into lockout
condition. Reset system by turning electrical power off or by
turning system controller to off or down below "call for heat". Wait
one minute, then turn system on.
YES
Are ignition cable and ground wire in good condition
(not brittle, burnt or cracked)?
Replace pilot burner
and/or ground wire.
YES
NO
NO SPARK AT PILOT BURNER
YES