Heater Contactor - Cleveland steamcraft 21-CET-8 Service Manual

Page 94 Model 21 -CET-8 Service Manual

Heater Contactor

1. Set the voltmeter to the 250 VAC scale.
2. Set the ON/OFF switch to the ON position.
3. Set the TIMED/MANUAL switch to the MANUAL position. Operate the SteamCraft
3.1 for about 10 minutes, or u ntil it is steaming continuously, and the water in the
float cylinder is at operating level.
4. Refer to Figure 5-22, and check for 120 VAC across the heater contactor coil
terminals.
• If the meter reads 120 VAC across the test points, and the heaters are hiring
the heater contactor is good. End this procedure here.
• If the meter reads 120 VAC across the test points, and the heaters are not
heating continue this procedure with step 5.
• If the meter reads 0 VAC or a low voltage across the test points, the fault is not
in the heater contactor.
a. Check the black, white/black, brown, and white/brown wires connected to
the heater contactor for continuity and secure connections. Replace or
repair faulty wiring and connections.
b. Test the high temperature lim it switch.
c. Test the float low level switch.
d. Test the TIMED/MANUAL switch.
5. Set the voltmeter to the 500 VAC scale. Refer to Figure 5-22, and check the
voltage across the contact pairs.
• If the meter reads 230 VAC across one or more contact pairs, replace the
heater contactor.
• If the meter reads 0 VAC across all contact pairs, the fault is not in the heater
contactor.
a. Check the wires and connections from the contact pairs to the heater
elements for continuity and secure connections. Replace o r repair faulty
wiring and connections.
b. Check the wires and connections from the terminal block to the contacts for
continuity and secure connections. Replace or repair faulty wiring and
connections.
c. Test heater elements.
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