Sure Flame SL11B - Page 15

SL11B & S1500 Manual 934-6644 - Page 15
c) If above procedures do not correct problem, then the adjusting screw
located on the side of the airswitch can be rotated counter clockwise,
just enough so that the fan stays running.
5 Control relay #2 closes, if not check:
a) If there is power between terminals A & B of relay #2, if power is
present then relay is faulty.
b) If there is power between terminals L1 & L2 of the Fenwall module,
but no power 2 seconds after startup between terminals V1 & V2 of
the Fenwall, then the Fenwall module is defective.
6 Gas valves are energized, and spark is initiated:
1) If gas valves do not open then check each gas valve individually:
a) If there is power between the wires leading to the gas valve, then
the gas valve is faulty.
b) If there is no power at terminal V1 of the Fenwall module 2
seconds after startup, but there is power at terminal L1 of the
Fenwall then the Fenwall module is faulty.
c) If there is no power at terminal L1 of the Fenwall module then
check the following components using the previously mentioned
tests for the limit switch, the airswitch and control relay #2.
2) If there is no spark then check:
a) Check the spark plug, gap should be at least 1/8".
b) Check if ignition wire is burnt or if it grounding out to the heater.
c) If there is power at terminal L1, and no power at terminal V1 of
the Fenwall then the Fenwall module is faulty.
7 Flame rod senses, and maintains flame, if not check:
a) If flame rod wire is connected to flame rod and not grounding out to
the heater.
b) if flame rod wire is inserted into to the correct location on the Fenwall
module.
c) The flame rod must always be screwed into the burner securely. The
probe part should not be touching the burner in any way thus
grounding out.
d) If the flame is too short and flame rod is not a bright orange colour,
then check if there is adequate manifold gas pressure.
e) If above checks are all good then the Fenwall module is defective.
The following instruction (#8) pertains to model S1500 only.
8 Set thermostat to desired temperature, heater will cycle from low to high
flame, if not:
a) If there is no power at the thermostat then the start switch is faulty.
b) If there is no power at the high flame side of the 2 stage regulator
then the thermostat is faulty.
c) If there is power at the high flame side of the 2 stage regulator then
the valve is faulty.