Groen CC20-E Operator's Manual page 150

CC20-G
Sequence Of Events
After Serial Number GC7243MS
14. Relay K15 energizes and drain valve closes. K13 energizes and boiler fill valve
opens. Boiler fills.
15. When water reaches low water level probe, relays K2 and K3 energize.
Gas valves SV3 and SV4 open.
16. When water reaches the high water level probe, relay K13 de-energizes and
boiler fill valve closes.
17. When water temperature is approximately 205°F, relay K14 energizes allowing
the condensate spray valve to open.
18. Relays K2 and K3 de-energize. Gas valves SV3 and SV4 close.
19. Relay K15 de-energizes. Drain valve opens.
20. Relay K14 de-energizes. Condensate spray valve closes.
5-12
(Revised 1/02)