A.S.M.E. pressure relief valve
One (1) primary high temperature cutoff control with automatic
reset and one (1) secondary high temperature cutoff control
with manual reset
One (1) low water cutoff control with manual reset
PID-step controller with number of heating stages depending
on the boiler heating power
Digital readout of the operating temperature
Magnetic contactors
Internal branch circuit fusing
Main supply power distribution block
Indicator lights for POWER, HEATING, CIRCULATOR PUMP
and ALARMS
Pressure and temperature gauge