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MODEL C24EA - ELECTRICAL OPERATION
F35453 (July 2008) Page 56 of 68
6. LED 13 Lit. Power to delime 1 (TDR). Time delay relay has no output from load terminal until input trigger
voltage is received by delime switch (2S) at the start of a delime cycle.
7. Water level drops below low level (L) probe.
A. Internal latching relay coil (ILR) on WLC de-energized. ILR-1 contacts return to N.O. condition.
B. HL LED lit. High level coil (HL) energized by ILR-2 contacts returning to N.C. condition. WLC (HL)
contacts close.
8. Water drops below LLCO probe.
A. LLCO LED off. Low level relay coil (LLCO) on WLC de-energized.
1) WLC (LLCO) N.C. contacts return to closed condition.
a. Fast fill/flush solenoid (3SOL) energized. Water flushes steam generator drain opening to clear
debris.
2) WLC (LLCO) N.O. contacts return to open condition.
B. LED 2 off. Limiting contactor (1CON) de-energized.
9. Drain (TDR) time elapses.
A. 120VAC removed from drain TDR load terminal.
1) LED 10 off. Drain relay (K3) de-energized. K3 contacts return to normal conditions. Power removed
from WLC.
2) Power removed from drain transformer (2T). Drain valve de-energized and valve closes.
10. Drain water temperature below 120°F. Condensate thermostat (1TAS) contacts return to open condition.
Drain cooling solenoid (1SOL) de-energized.
11. LED's 1, 9, 12 and 13 lit. Draining complete and steamer is off.
Deliming Cycle
NOTE: Allow steam generator to completely drain and the drain valve to close before adding delime solution.
Refer to Installation & Operation manual for deliming procedure.
1. Power switch (1S) off and steam generator empty. LED's and components conditions are in the same state as
outlined at the end of Turning Steamer Off.
2. Press delime switch (2S) to DELIME position (momentary) and hold until delime (4LT) (red) and power (3LT)
(amber) lights are lit (approx. 2 seconds). Release delime switch to return to center off position.
A. LED 15 lit. Delime relay (K2) energized.
1) K2-6/4 N.O. contacts close. Delime light (4LT) lit.
2) Power to delime 1 (TDR) input trigger and delime 1 (TDR) is energized. LED 13 remains lit as in
Turning Steamer off. 120VAC output from load terminal remains on for 3 additional minutes after
power is removed from input trigger to allow heat exchanger to drain (delime valve energized). Total
time 63 minutes unless canceled (delime 2 TDR default time of 60 minutes plus delime 1 TDR of 3
minutes).
a. Delime transformer (3T) powered. Delime valve energized and opens (approx. 10 second
delay while valve motor capacitor charges).
b. Delime valve end switch contacts close.
c. LED 17 lit. Delime relay (K7) energized.
a) K7-5/1 N.C contacts open. X1 potential removed from power switch (1S).
b) K7-5/3 N.O. contacts close. Allows delime 1 (TDR) to remain powered during delime cycle
after K4-6/2 N.C. contacts open.
3) K2-5/1 N.C. contacts open. Power to cooking compartment controls is locked out.
B. LED 14 lit. Delime relay (K4) energized thru K6-5/1 N.C contacts.
1) Delime 2 (TDR) powered thru K4-6/4 closed contacts (N.O.). 120VAC output from delime 2 (TDR)
load terminal for 60 minutes.