72
2.4 Sequence of Operation
Operational State
Front
Panel
Indica-
tors
User Interface Display
Explanation
Boiler operates in standby mode
until demand for Central Heat
(CH) or Domestic Hot Water
(DHW) is detected.
CH or DHW pump is turned
on based on type of heating
demand.
(CH call is illustrated)
Control Module compares
supply Temperature to set
point. Boiler proceeds to
ignition if supply temperature is
less than set point.
Combustion Air Blower speed
modulates to pre-purge setting
for 15 seconds.
Sparking initiated sequence.
Heat
Demand?
DHW CH
Pump on
Supply
Temperature
<Setpoint?
15 Second
Prepurge
Ignition
Sparking
No
Yes
No
Yes
After 2 seconds
APPENDIX A - CONTROL MODULE
Содержание Olsen OLSSC-299
Страница 47: ...47 13 TROUBLE SHOOTING ...
Страница 51: ...51 13 TROUBLE SHOOTING ...
Страница 53: ...53 13 TROUBLE SHOOTING ...
Страница 62: ...62 Supply Water Temperature Sensor Resistance Chart 13 TROUBLE SHOOTING ...
Страница 66: ...66 14 3 Connection Diagram 299 MBH 14 WIRING DIAGRAM EXTERNAL PUMP RELAY LIMIT OF 1 AMP PER PUMP SEE SECTION 8 ...
Страница 84: ...ECR International Inc 2201 Dwyer Avenue Utica NY 13501 web site www ecrinternational com ...