Burnham V8 Series - Manual (Page 72)

72
AQUASTAT SWITCHING ACTION WITHIN
L8148A CONTROLS
The switching action in the L8148A control has one set-
ting, the high limit. The switching relay is controlled by the
low voltage room thermostat. On a call for heat, the relay
contacts make to complete the line voltage circulator circuit
and also the burner circuit if the boiler water temperature is
below the high limit setting. The high limit switch shuts off
the burner if boiler water temperature exceeds the high limit
setting.
Set the indicator at the desired shut-off temperature.