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Manual of SR258 intelligent controller
7
Note:
wires must be fastened by fixing clamps on the position C.
3.3 Terminal connection
Note:
before opening the housing! Always disconnect the controller from power
supply and obey the local electrical supply regulation.
Input ports
T1: PT1000 temperature sensor, for measuring the temperature of collector and thermal
energy calculation.
T2 ~T5: NTC10K, B=3950 temperature sensor, for measuring temperature of tank and
pipe.
PWM: Signal ports for high efficiency pump, detailed connection see below
FRT: For rotary vane type electronic flowmeter
Advice regarding the installation of temperature sensors:
Only original factory equipped Pt1000 temperature sensors are approved for using with
the controller, it is equipped with 1.5m silicon cable and suitable for all weather
conditions, the cable is temperature resistant up to 280
o
C, connect the temperature
sensors to the corresponding terminals with either polarity.
Only original factory equipped NTC10K,B=3950 temperature sensors are approved for
using with tank and pipe, it is equipped with 3m PVC cable, and the cable is
temperature resistant up to 105
o
C, connect the temperature sensors to the
corresponding terminals with either polarity.