Utica Boilers UB90-200 インストール手順
32
End Of Normal Sequence Of Operation
Thermostat ends call for heat.
Gas valve and circulator pump are
de-energized,
valve and flame lights go out.
Blower runs for 30 seconds post purge,
purge light is on.
Blower is de-energized after 30 seconds,
purge light shuts off.
Boiler stand by for next call for heat.
12 - DETAILED SEQUENCE OF OPERATION