VSX SERIES STEAMER - SERVICE PROCEDURES
Page 24 of 80
A. If other appliances are connected to the
same gas line, turn them all ON and check
manometer pressure reading again. If a
pressure drop of ½ inch water column or
more is observed, 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 and the manifold pressure
still requires adjustment, proceed to step
5.
5. Remove the adjustment screw cap to access
the pressure adjustment screw.
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.
6. After the burner lights, set the pressure as
outlined below:
PRESSURE READINGS
(INCHES W.C.)
GAS TYPE MANIFOLD
LINE
RECOMMENDED MIN MAX
Natural 4.0 7.0 5.0
14
Propane 10.0 11.0 11.0
* If the incoming line pressure is
less than
the
minimum stated, then the manifold pressure can not
be set correctly.
7. Once the correct pressure has been set, turn
the power switch OFF, replace the adjustment
screw cap and 1/8 inch NPT plug (pressure tap)
on the outlet side of the valve.
8. Check unit for proper operation.
ELECTRIC MODELS
Magnetic Contactor
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.
The contactor can be serviced by removing the
cover of the contactor box.
A noisy contactor (hum or chatter) is generally due
to enough dust or dirt on the armature pole faces or
around the armature core that the magnet coil
cannot pull the armature into a completely sealed
position. This can usually be corrected by blowing or
wiping the pole faces clean. To inspect electrical
contacts, remove cover at top of contactor by
removing two screws which hold it in place. Replace
contactor if the electrical contacts appear to be
pitted or burned.
Heating Element
WARNING:
THE FOLLOWING STEPS REQUIRE
POWER TO BE APPLIED TO THE UNIT DURING
THE TEST. USE EXTREME CAUTION AT ALL
TIMES.
1. Measure the voltage at the heating element
terminals and verify it against the data plate
voltage.
A. If voltage is correct then proceed to step 2.
B. If voltage is not correct, check the
following:
1) Voltage supply to the unit.
a. Fuses or breaker blown.
b. Power to contactor coils.
c. Contactors not pulling in.
(Mechanical)
2. Check current draw (amps) through the heating
element lead wires.
See table below for
proper values.
A. If current draw is correct then heating
element is ok.
B. If current draw is not correct then proceed
to step 3.
