ELECTRICAL CONNECTIONS
22
5.4.
Connecting exhaust temperature sensor
.
The emission sensor should be fitted in the boiler flue (3). The gap between the sensor and the
flue should be sealed. The sensor should be installed by a qualified fitter, while observing
regulations applicable for chimney systems. The emission sensor should be connected to the
sensor terminals according to the electrical scheme. The emission sensor lead cannot touch hot
elements of the boiler and the flue, the temperature of which exceeds 350°C. The emission
sensor should be installed in such distance from the boiler at which it is not directly exposed to
flames, and where the emission temperature does not exceed 450°C.
5.5.
Connecting temperature sensors
The regulator is compatible only with sensors type CT4 (sensor of boiler and hot utility water)
and CT2s (emission sensor). It is prohibited to use different sensors. Sensor leads can be
extended with wires with section of at least 0,5mm
2
. Total length of the sensor leads cannot
exceed 15m. The boiler temperature sensor CT4 should be fitted in the boiler bulb pipe. Hot
utility water temperature sensors CT4 - in the thermometric pipe welded into the tank.
The sensors must be secured against coming loose from the measured surfaces.
5.6.
Connecting weather sensor
The regulator cooperates only with a weather
sensor of the CT4-P type. The sensor should be
installed on the coldest wall of the building,
usually this is the northern wall, under the
roof. The sensor should not be exposed to
direct sunlight and rain. The sensor should be
fitted at least 2 m above the ground, far from
windows, chimneys and other heat sources
which
could
disturb
the
temperature
measurement (at least 1,5 m).
Connect the sensor using cable of 0,5 mm
2
cross-section, up to 25 m long. Polarity of the
leads is insignificant. Connect the other end of
the cable to the regulator, as shown in electric
diagram.
Attach the sensor to the wall using tackbolts.
To access the tackbolts holes, unscrew the
sensor lid.
