ST- 85 – USER'S MANUAL
pump mode. To be able to operate the boiler in all modes, it is necessary to
replace the sensor.
III.c) Temperature Protection
The regulator features an additional protection in case the bimetal sensor
is damaged. After the temperature exceeds 85
O
C, the alarm is sounded with
the display showing the following message:
The current temperature is read from an electronic sensor and
processed by the thermoregulator. When the alarm temperature is exceeded,
the fan is shut off and both pumps begin to run in order to distribute hot
consumption water throughout the system.
III.d)
Anti-Boil Protection
This protective function is used only with the
water heater priority
mode. For example, when the water heater setpoint temperature is 55
O
C and
the boiler temperature rises to 67
O
C (5
O
C over the so-called
priority
temperature
), the controller shuts off the fan.If the boiler temperature
reaches 80
O
C, the C.H. pump will be activated. If the temperature continues
to rise, the alarm will be activated at 85
O
C. Such condition may appear when
the water heater or the pump is damaged or when the sensor has been
improperly installed. However, if the temperature drops, the controller will
activate the fan at 66
O
C and it will remain in the duty mode maintaining the
priority temperature of 62
O
C.
- 17 -
Alarm
Temperature Too
High
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