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VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
F24700 (October 2001) Page 34 of 68
c. Replace the orifice, pressure
switch and connect the lead
wires to the switch. Turn the
power switch ON and adjust the
pressure switch again as outlined
in steps 4A and 4B. Verify the
pilot gas valve is energizing.
d. If the pilot gas valve is not
energizing and power is
available to the pressure switch,
turn the power switch OFF.
Replace with a new air pressure
switch and adjust the switch as
outlined from step 3 thru the end
of this procedure.
5. Restart the ignition sequence by "rapidly"
turning the power switch OFF then back ON. A
rapid switching is needed to keep the boiler
from starting automatic blowdown.
A. Press the reset switch to start the ignition
process.
1) Listen for gas pilot ignition to verify
operation.
a. If gas pilot ignition is successful,
turn the ON/OFF knob for the
main gas valve back to ON.
b. Listen for main gas burner
ignition to verify operation.
B. Verify the pilot and main burner both ignite
in succession.
1) Restart the ignition sequence by
"rapidly" turning the power switch
OFF then back ON. A rapid switching
is needed to keep the boiler from
starting automatic blowdown.
2) Press the reset switch to start the
ignition process.
C. Listen for main gas burner ignition to
verify operation.
GAS PILOT 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 BEFORE
SERVICING THE UNIT.
1. Open the cabinet base door to access pilot gas
valve.
2. Remove the pilot pressure plug tap from the
outlet
side of valve.
A. Install a hose barb adaptor and attach a
gas pressure manometer.
3. Turn the gas supply and power switch ON.
A. Once the boiler fills, press the reset switch
to start the ignition process.
NOTE
: The reset switch can be pressed after
the green ready light on the switch comes ON.
This indicates the water level in the boiler is at
the minimum operating level.