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5.2.1.
Interface control board of hot water electric boiler of series
“ELTHERM”
Figure 5.1.
Interface control board, equipped with control and operating devices of
hot water electric boiler of series “ELTHERM”.
Interface control board description:
•
Main “
POWER supply fuse
”–
switches ON and OFF the main power
supply of the hot water pellet boiler of series “ELTHERM”
;
•
Operating thermostat
–
assigns the set-point of circulating water
temperature in the boiler. The electric heaters of the boiler will be powered
on until this set-point is reached and will supply heat energy to the heating
system
;
•
Emergency overheating thermostat
–
protects the hot water boiler of
series “ELTHERM” from exceeding emergency temperature levels and
overheating. This thermostat is factory preset to switch off the power supply
of the electric boiler at water temperature in the boiler above 95
o
C (factory
set)
;
•
Thermo-manometer
–
indicates the operating temperature of the
circulating water in the heat exchanger jacket of the electric boiler, well as
water overpressure;
•
Alarm indicator – emergency boiler overheating
–
indicates emergency
overheating state of the boiler, due to activation of the emergency thermostat
Operating thermostat
Power supply
main fuse
Emergency overheating
thermostat
Alarm signal
(boiler’s overheating)
START
indicator
Thermo-
manometer
Thermal stage switch
POWER
indicator
