Modulex Light Commercial Series
CHAPTER 4: Installation Instructions
OMM-0158_A
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4.8.3.2 Reversing Flow & Return Temperature Sensors
One sensor is located on top of the lower Return pipe railing, the other is located under the
upper Flow pipe railing. Move these two sensors to other end of Flow/Return pipes.
Figure 4-12:
Reversing Flow and Return Temperature Sensors
4.8.3.3 Moving Boiler Sensor KF
Move the Boiler Sensor KF (sensor only, not the thermowell) to the opposite side and install
into thermowell under the air vent.
ORIGINAL LOCATION
NEW LOCATION
Figure 4-13:
Moving Boiler Sensor KF
NOTE:
When reversing hydraulic and gas pipe connections, you must close up the chassis
openings vacated after the change. See Figure 4-15.
Sensor Cable Plugged
into Sensor
Sensor cable unplugged
showing sensor, sensor
bracket, and screw
onto chassis/pipe.
C.H. Flow Sensor is installed same as
Return Sensor, except under Return
pipe.
