Cleveland SteamCraft 10 Service Manual page 122

Page 116 SteamCraft 10 Service Manual, Chapter 6
YES (Continued)
IT:2-3 Does the heater contactor close when the On/Off Switch is switched to the On posi-
tion?
IT:2-4 Does the compartment heat to near steaming temperature?
17:2-5 Does the heater contactor open when the pre-heat thermostat opens?
Phase 2 testing is complete. Proceed to Phase 3 testing.
Printed 3/93
3. If the plumbing, drain and fill valves are not blocked, test the operational
water float for continuity through the upper switch according to compo-
nent test CT:6.
NOTE: This switch controls operation of the fill solenoid valve during
preheat and steaming operations. It is normally closed, and remains
closed until float water level reaches approximately one inch from the top
of the float cylinder.
4. If the operational water float is functioning properly, test the water fill
solenoid valve according to component test
5. If the waterfill solenoid valve is functioning properly, test the 3-way drain
valve according to component test CT:1.
NOTE: This valve is normally open, directing water flow to the drain piping.
During preheat and steaming operations, the solenoid closes this valve
directing water to the steam generator. The valve remains closed until the
float water level reaches approximately one inch from the top of the float
cylinder.
NOTE: During preheat and steaming operations this lower float switch
controls operation of the heater components through the Preheat Thermostat
and the heater contactor. This switch is normally open, and remains open
until the float water level is approximately one inch from the bottom of the
float cylinder (safe operating level).
Three possible malfunctions could prevent the contactor from activating.
* The Preheat thermostat is malfunctioning.
* The LWCO switch is malfunctioning.
* The high limit switch assembly is malfunctioning.
1. Check the Preheat Thermostat according to component test CT:8.
2. Check the lower float switch according to component test CT:6.
3. Check the high limit switch assembly according to component test CT:22.
1. Check the heater element assembly according to component test CT:23.
NOTE: When the water in the steam generator approaches steam tempera-
ture, the pre-heat thermostat opens (at 185°). This de-energizes the
condenser valve and the heater contactor. The heater shuts off.
Check the preheat thermostat according to component test CT:8.
NOTE: If the components of the upper and lower compartment and steam
generator groups were not examined simultaneously during Phase 2, repeat
the tests for the components not yet tested.
Models 24-CGA-10 and 24-CEA-10
CT:4
.
Cleveland Range, Inc.