Setup Temperature Function; Central Heating Pump Control; Protection - TECH ST-22 Manual

ATTENTION: Improper setup of the two functions may cause a constant
temperature increase! Especially, the ventilator pause should not be too short
and the ventilator work should not be too long.
Setup temperature is the temperature that is set up for the boiler. It can be
changed by the buttons
when the display pulses. After 4 sec. the display shows the boiler temperature.
Central heating pump control ("C.O."). This function is used for switching on
or off the c/h pump depending on the temperature of the water in the boiler. The
pump switches on after having reached 30
works constantly. The pump is switched off below 28
from unnecessary operation.
The controller is equipped with diverse protection elements. Any errors are
displayed:
E4 – the maximum boiler temperature exceeded (setup at 85
E5 – the temperature sensor is damaged
In the both cases the ventilator switches off whilst the c/h pump switches on
(if the pump is not just working). In the case of E4 appearance, the alarm can be
deleted by pressing
Besides, the controller is protected by a bimetallic mini-sensor that cuts out the
electricity supply (at 85
works.
This type of the safety temperature limiter is a protection causing return to
the start position: automatic. The ST-22 controller includes a fuse WT 1,6A
protecting the grid. The regulators ST-23, 30, 80 are equipped with two fuses
1,6 protecting the grid. Usage of a higher value fuse may damage the controller.
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Setup temperature function

(up) and

Central heating pump control

Protection

after the temperature decreases to the proper level.
o
C), during the process the central heating pump still
Translated by WWW.KOTLY.COM
– Heating technology
(down). The temperature is changed
o
C. Above the temperature, the pump
o
C – this prevents the pump
o
C)