Service manual

VSX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
Page 25 of 40
HOT SURFACE IGNITOR (GAS)
1. Check to see if hot surface ignitor is operating
during
ignition trial
by:
A. Visual verification - HSI should be heating
up “glowing brightly” to ignite gas.
B. Voltage verification - check for 24VAC to
HSI termination on the edge connector to
ground.
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.
2. Unplug the edge connector from the ignition
module and check resistance between HSI lead
wire and ground.
HSI
CONDITION
RESISTANCE
(approx. Ohms)
COLD 1 - 4
HOT 8 - 10
HEATING ELEMENT (ELECTRIC)
WARNING:
THE FOLLOWING STEPS REQUIRE
POWER TO BE APPLIED TO THE UNIT DURING
THE TEST. USE EXTREME CAUTION AT ALL
TIMES.
1. Check voltage at the heating element terminals.
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 using an amp clamp meter.
A. If current draw is correct then heating
element is ok.
B. If current draw is not correct then proceed to
step 3.
3. Remove the lead wires from the heating
element and check the element resistance using
a VOM.
A. If resistance readings are not correct,
replace heating element.
4. Check unit for proper operation.
VOLTAGE
TOTAL
KW
AMPERAGE
PER LINE
RESISTANCE
PER LINE
(OHMS)
1 PH 3 PH
208 7.5 36.1 20.9 17.4
240 7.5 31.3 18.1 23.1
480 7.5 9.0 30.6
208 10 48.1 27.8 12.96
240 10 41.7 24.1 17.28
480 10 12.1 23.01
208 15 72.2 41.6 8.64
240 15 62.5 36.2 11.52
480 15 18.1 15.36
NOTE:
Values in the table are nominal. Tolerance is
+5/-10 %.