Laars MASCOT LX, Service Manual

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Mascot LX Service Manual
The inlet water temperature sensor allows the control
system to monitor the temperature of the water before it
goes through the heat exchanger. The sensor uses an
electronic device called a “thermistor.” For instructions
on testing the sensor, see Section B9.
Replacement Procedure -
1. Turn off power to the system. Use the main discon-
nect switch mounted on the front panel.
2. Remove the lower front cover. The inlet water tem-
perature sensor is mounted in the lower left corner of
the unit. See Fig. B3-1.
3. Unplug the wiring connector (two wires). The con-
nector is locked in place by a “squeeze tab.” Press
on the tab to release the connector.
4. The sensor is held next to the exterior of the water
pipe by a spring clip.
5. To test the sensor for accuracy, see Section B9.
6. To reassemble, reverse the process we have just
described.
Inlet water
temperature
sensor
Tube for
pressure
gauge
Fig. B3-1 - Inlet water temperature sensor (typical)
Inlet Water Temperature Sensor
B3