Groen CC20-E Operator's Manual page 38

CC20-E
Sequence Of Events
Prior to Serial Number C7439MS
Relay Operation Summary
1. R1 energized. (Mercury Relay)
2. K15 and K13 energized. (Drain and Fill)
3. K6, K7 and K8 energized. (Fan)
4. K2 through K4, and R2 through R4 energized. (Water Heat)
5. K13 de-energized. (Fill)
6. K2 through K4, and R2 through R4 de-energized. (Water Heat)
7. K14 energized. (Condensate Spray)
8. K11, K12, R11, and R12 energized. (Air Heat)
9. K12 and R12 de-energized. (Low Air Heat)
10. K11 and R11 de-energized. (High Air Heat)
Two Stage Cleaning Cycle (Prior to Serial Number C7439MS)
Refer to the schematic diagrams on pages 3-32 and 3-33 for the following
sequence of events.
Phase 1
1. Press 9-9 on the touch pad. C1 is displayed in the "TIME" window. Spray
degreaser around the cavity and press "START." CL:50 is displayed in the
time display window.
2. Mercury relay R1 energized.
3. Relays K15 and K13 energize. Boiler fills.
4. Relays K6, K7, and K8 energize. Fan motor turns on.
5. Water reaches low water probe. Relays K2, K3, K4, R2, R3, and R4
energize. Water heating elements turn on.
6. Water reaches high level probe. Relay 13 de-energizes and boiler fill valve
closes.
7. Relays K2, K3, K4, R2, R3, and R4 de-energize.
8. Relays K2, K3, K4, R2, R3, and R4 energize and water heating elements
turn on.
9. Relay K14 energizes and condensate spray valve opens.
10. Relays K2, K3, K4, R2, R3, and R4 de-energize and water heating elements
turn off.
11. Relay K15 de-energizes. Drain valve opens and boiler drains.
3-6
(Revised 1/02)