Technical information

Portable Chillers UGH024/1103
6-48 TROUBLESHOOTING
REPLACING THE
RTD PLC
ONLY
To replace the RTD:
Disconnect and lockout power to the chiller.
Disconnect the To Process tubing from the
To Process connection.
1
2
Open the Drain/Fill valve and drain water
from the unit so the water level is lower that the RTD.
Open the side of the chiller.
Disconnect the RTD wiring from the
transmitter electrical box. Refer to the wiring diagram.
Remove the RTD.
Loosen the compression nut to slide the RTD out of the
evaporator.
Install the new RTD.
The new RTD should be inserted in the evaporator so that
the tip is extended completely through the evaporator.
Wire the RTD. to the temperature transmitter
to the TIC control in the top electrical enclosure, or to
the temperature transmitter (PLC control) and the electri-
cal box.
4
5
3
6
7
8
Sensor
Temperature
transmitter
electrical box
Always refer to the
wiring diagrams you
received with your
chiller to locate specific
electrical components.
Sensor
Fill / Drain
valve
To Process
connection
Fill / Drain
valve