Heater And Dryer Elements - Cleveland steamcraft 21-CET-8 Service Manual

Heater and Dryer Elements

Figure 5-23. Heater Coil and Dryer Element
Voltage
Figur e 5-24. Ohmmeter Connections for
Heater Coil Resistance
1. Set the voltmeter to the 500 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 until it is steaming continuously, and the water in the float
cylinder is at operating level.
4. Refer to Figure 5-23, and check for 230 VAC across all three heater coils.
• If the meter reads 230 VAC across all three heater coils, continue this procedure with
step 5.
• If the meter docs not read 230 VAC across one or more of the heater coils, the fault is
not in the heater elements.
a. Check the wires to the heater and dryer elements for continuity and secure
connections. Replace or repair faulty wiring and connections.
b. Check for 230 VAC in each phase at the main power supply switch.
c. Test the beater contactor.
d. Check the resistance of heater and dryer elements as described in steps 5 and 6 of
this procedure.
5. Prepare the SteamCraft 3.1 components for testing the heater and dryer element resistance
as described below. Perform the resistance tests as described in step 6.
a. Set both the ON/OFF switch and the main power switch to the OFF position.
b. Refer to the schematic wiring diagram and disconnect all heater and dryer
leads from element terminals of contactor.
c. Set both the ON/OFF switch and the main power switch to the ON position. Allow
water to fill the float cylinder to operating level.
d. Zero adjust the ohmmeter at the lowest scale. Continue this procedure with
step 6.
6. Refer to Figure 5-24, and check the resistance of each heater and dryer element Compare
the meter readings with the values listed in Tables 5-1 and 5-2.
• If any of the heater coils do not have the resistance specified in Table 5-1
replace the element.
• If the dryer element does not have the resistance specified in Table 5-2,
replace the element
• If all three heater coils have the resistance specified in Table 5-1, continue this
procedure with step 7.
• If the dryer clement has the resistance specified in Table 5-2, continue this procedure
with step 7.
7. Prepare the SteamCraft 3.1 components for testing the heater and dryer element insulation
resistance as described below. Perform the insulation resistance tests as described in step
8.
Model 21-CET-8 Service Manual
Page 95
Printed 12/90