Models 24-CGA-10, and 24-CEA-10
SteamCraft 10 Service Manual, Chapter 6
Page 99
Turn on the main disconnect switch and start a stopwatch.
NOTE:
When electric power is turned ON at the main disconnect switch with the
panel ON/OFF switch OFF. an automatic 3-minute blow-down cycle starts . Use
the stopwatch to check that the 3-minute timer stops the blow-down cycle in three
minutes.
IT:1-2 Does water flow from BOTH the float cylinder rinse nozzle and the 3-way
valve drain port?
NOTE:
During the automatic blowdown cycle, the water fill, rinse, and drain
valves are open. Fresh water flushes the float assembly and drains into the steam
generator. Water rushing through the 3-way drain valve pulls water from the steam
generator (Refer to Drain Valve Operation on page xx).
If water flows from BOTH the float cylinder rinse nozzle and the 3-way valve
drain port; the 3-Minute Timer, the water fill, rinse, and drain (3-way) valves are
functioning properly. Continue the procedure with test
IT:1-6.
IT:1-3 Does water flow from EITHER the float cylinder rinse nozzle or the 3-way valve?
NOTE:
During the blowdown cycle, the 3-Minute Timer activates the fill
and rinse solenoids opening the valves. If the timer malfunctions neither
solenoid will activate and open its valve.
No water flow from both the float rinse nozzle and the 3-way valve
indicates three possible malfunctions:
• The 3-Minute timer is malfunctioning.
• Both the rinse and fill solenoid valves have failed simultaneously.
• Both the rinse and drain solenoid valves have failed simultaneously.
A single component failure is more probable than a double, simultaneous
failure.
1.
Test the 3-Minute timer according to component test
CT:2
.
2. If the 3-Minute timer is working properly according to component test
CT:2
, proceed to
IT:1-4
. and begin testing the fill solenoid valves.
IT:1-4 Does water flow through the float cylinder rinse nozzle?
If water does not flow through the rinse nozzle:
1. Check the rinse nozzle, solenoid valve and associated plumbing for
blockage.
2. If the float rinse nozzle, plumbing, and valve are not blocked, refer to
component test
CT:3
and test the rinse solenoid valve.
(Continued on next page.)
Cleveland Range, Inc.
Printed 3/93
