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l
Turn on power and set thermostat to
call
for
heat.
The pilot should light but the main burner will remain
off because the main valve actuator isdisconnected.
l
Check the pilot flame. Make sure it is blue, steady
and envelops3/8to
l/2 in. [lOto 13 mm]of theflame
rod. See Fig. 14 for possible flame problems
and
their causes.
l
lf necessary, adjust pilotflame
by turning the pilot
adjustment
screw on the gas control
clockwise
r'\
to decrease
or counterclockwise
n
to increase
pilot flame. Following
adjustment,
al-
ways
replace
pilot adjustment
cover
screw
and
tighten firmly to assure proper gas control operation.
l
Set thermostat
below room temperature
to end
call for heat.
1 Recheck ignition sequence
as follows.
l
Reconnect
main valve wire.
l
Set thermostat
to call for heat.
l
Watch ignition sequence
at burner.
l
if
spark still doesn't stop after pilot lights, replace
ignition module.
l
If
main burner doesn't light or if main burner lights
but system locks out, check module, ground wire
and gas control as described
in appropriate
trou-
bleshooting
chart, Fig. 15 or 16.
APPEARANCE
I
CAUSE
SMALL BLUE FLAME
CHECK FOR LACK OF GAS FROM:
. CLOGGED ORIFICE FILTER
. CLOGGED PILOT FILTER
. LOW GAS SUPPLY PRESSURE
. PILOT ADJUSTMENT AT
MINIMUM
LAZY YELLOW
FLAME
CHECK FOR LACK OF AIR FROM:
,I
P
. LARGEORIFICE
. DIRTY LINT SCREEN, IF USED
. DIRTY PRIMARY AIR
OPENING, IF THERE IS ONE
. PILOT ADJUSTMENT AT
MINIMUM
WAVING
BLUE FLAME
CHECK FOR:
. EKCESSIVE DRAFT AT PILOT
LOCATION
. RECIRCULATING
PRODUCTS
OF COMBUSTION
I
NOISY LIFTING
BLOWING
FLAME
CHECK FOR:
. HIGH GAS PRESSURE
FIG. 14-EXAMPLES
OF UNSATISFACTORY
PILOT
FLAMES.
18
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