Cleveland SteamCraft V, Service Manual

Page: 70 / 96

Page 68
CET-16 Service Manual
NOTE
Before the rear contactor will operate, the Steamer
Ready Conditions (page 60) must be met If the
compartment door is open for troubleshooting or
repair, a magnet must be placed over door sensor
to simulate a dosed door.
Generator Temperature Control Circuit
The genertor temperature thermistor attaches to the front of the steam
generator near the water level probes. The mounting of the thermistor is
critical to proper operation of the control.
• The thermistor must be in good contact with the mounting surface.
• A thermal conductive pad or compound between the mounting surface
and thermistor is necessary for proper thermal conduction.
• The mounting surface should be smooth, clean, and free of weld spatter
or other defects that may interfere with thermal conduction. The water
temperature, below which the rear contactor energizes, can be changed
by adjusting the control board potentiometer labeled GEN TEMP
ADJUST (
Figure 5-2
). Turn the screw clockwise to increase
temperature. Set the control so the water temperature remains
approximately l90 F. Being careful not to contact the heater elements,
measure the water temperature with a thermometer.
Drain Temperature Circuit
The drain temperature thermistor attaches to the condenser. The drain
temperature adjustment circuit depends upon proper mounting of the
thermistor and proper adjustment of the board-mounted potentiometer.
Follow the same mounting considerations as for the generator tempera-
ture thermistor. Use the following procedure to adjust the potentiometer
labeled DRAIN TEMP ADJUST.
1. Remove front control panel assembly and install a magnet over the
door sensor location as shown in
Figure 5-5
.
2. Turn DRAIN TEMP ADJUST potentiometer clockwise 10 turns.
3. Turn steamer on and start a manual steaming cycle by pressing the
MANUAL touch pad.
4. Allow steamer to operate empty for 15 to 20 minutes During this time,
check mat the rear heater contactor does not cycle on. If contactor
does turn off, turn off the steamer and turn DRAIN TEMP AD JUST
potentiometer clockwise several additional turns.
5. Repeat steps 3 and 4 until the rear contactor remains energized for at
least 15 minutes.
Printed 4/90