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4.1.4 Installing the Supply Sensor
4.2 Electrical Connections
IM-HC 561174 1120 Basic Heating Control
This sensor is designed to mount on a pipe or in a
temperature immersion well.
The Supply Sensor can be strapped directly to the pipe using a plastic
cable tie. Insulation should be placed around the sensor to reduce the
effect of air currents on the sensor measurement.
The Supply Sensor should be placed downstream of a circulator pump
or after an elbow or similar fitting. This is especially important if large
diameter pipes are used, as the thermal stratification within the pipe can
result in erroneous sensor readings. Proper sensor location requires that
the fluid is thoroughly mixed within the pipe before it reaches the sensor.
When using the Supply Sensor with a Mixing Station, insert the sensor
into the immersion well, see image to the left.
When using the supply sensor with a ProBloc insert the sensor into the
immersion well located in the supply valve body. Connect 18 AWG or
similar wire to the two wires of the sensor and then to the control. Do not
run the wires parallel to telephone or power cables. If the sensor wires
are located in an area with strong sources of electromagnetic interference
(EMI), shielded cable or twisted pair should be used or the wires can be
run in a grounded metal conduit. If using shielded cable, the shield wire
should be connected to the COM sensor terminal on the control and not
to earth ground.
The installer should test to confirm that no voltage is present at any of the
wires. Push the control into the base and slide it down until it snaps firmly
into place
Installation
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