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VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
2)
If a spark from ignitor is present but
does not ignite gas before the ignition
control module locks out, (90 sec.)
there may not be enough gas in the
line for ignition. Verify the gas supply
and gas combination control valve
are both on. Turn the ignition control
modules re-set switch OFF then ON
to reset the module. Sparking should
then resume to ignite gas. The
module may need reset several times
before ignition takes place.
3)
If ignitor is still not sparking proceed
to step 3.
3.
Check the ignition control module and
transformer.
A.
Turn the ignition control modules re-set
switch OFF then ON to eliminate a lockout
condition.
B.
Check for 24VAC output on the ignition
control module transformer.
1)
If 24VAC is present between
terminals 5 & 6 on the ignition control
module but ignitor is not sparking,
then replace ignition control module
and re-test.
2)
If 24VAC is not present then ensure
that transformer is receiving 120VAC
input. If ignition control module
transformer is receiving proper
voltage, then replace ignition control
module transformer and re-test.
4.
After making the necessary component
adjustments or replacements, check for proper
operation.
GAS MANIFOLD PRESSURE
ADJUSTMENT
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AT THE MAIN
CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT
BOX INDICATING THE CIRCUIT IS BEING
SERVICED.
WARNING: SHUT OFF THE GAS SUPPLY
BEFORE SERVICING THE UNIT.
1.
Open the front cabinet doors and turn the gas
combination control valve off.
2.
To measure the manifold pressure, remove the
1/8 inch NPT plug (pressure tap) on the outlet
side of the valve and attach a manometer.
3.
Turn the gas combination control valve and the
main power switch to ON.
4.
After the burner lights, compare the manometer
pressure reading to the pressure chart near the
end of this procedure.
A.
If other appliances are connected to the
same gas line, turn them all ON and check
manometer pressure reading again. If the
pressure drops ½ inch water column or
more, then the incoming pressure should
be checked. then the gas supply needs to
be checked by the gas line installer or the
local gas company for adequate sizing.
B.
If no other gas appliances are connected
to the gas line or the pressure does not
drop as described above but the manifold
pressure still requires adjustment, proceed
to step 5.
5.
Remove the adjustment screw cap to access
the pressure adjustment screw.
6.
After the burner lights, set the pressure as
outlined below.
A.
To increase pressure, turn the screw
clockwise.
B.
To decrease pressure, turn the screw
counterclockwise.
NOTE: Accurate gas pressure adjustments can only
be made with the gas ON and the burner lit.
GAS TYPE
MANIFOLD
Natural
Propane
NOTE: If the incoming line pressure is less than the
minimum stated, then the manifold pressure can not
be set correctly.
Page 33 of 88
PRESSURE READINGS
(INCHES W.C.)
LINE
RECOMMENDED
4.0
7.0
10.0
11.0
MIN
MAX
5.0
14
11.0
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