A.O. Smith Boiler HW 610 User Manual

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49
CHECKING HONEYWELL S8600H OR S-8610M
INTERMITTENT IGNITION CONTROLS
SPARK AT PILOT BURNER BUT PILOT WILL NOT LIGHT
Ensure all manual shutoff valves are fully open; all lters are
clean; all gas connections are gas tight; pilot tubing is not
damaged, obstructed or kinked; and pilot orice is unclogged.
Check for air in gas line, purge (bleed) line if necessary.
Are the wires securely attached to the pilot operator on the gas
control and to the PV & MV/PV terminals on the ignition module?
Install a pressure gauge in the pilot tubing line between the
gas control and the pilot burner assembly. Ensure that the pilot
adjustment screw (under cap) is adjusted to a position that will
permit gas to ow.
Is pilot gas owing during ignition attempt?
Turn off power supply.
Is ignition cable rmly plugged into pilot assembly and module?
Is ground wire rmly attached to pilot assembly and GND
terminal on module?
Are ignition cable and ground wire in good condition (not brittle, burnt, or cracked)?
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 ceramic insulator surrounding the electrode in good
condition (not cracked or broken)?
Is there excessive draft conditions that may cause pilot
burner ignition problems?
Correct draft problems in a manner that would ensure
adequate combustion and ventilation air and proper
pilot burner performance.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
Attach wires rmly.
Replace gas valve.
Turn on power supply.
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 pilot burner.
Replace ignition
module.
YES
YES

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