R
EPLACING THE
RTD
Series 1 Portable Chillers, PLC Control
UGH017/0500
6-20
T
ROUBLESHOOTING
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
and to the electrical box.
Fill/Drain valve
4
5
3
6
7
8
Always refer to the wiring dia-
grams you received with your
chiller to locate specific elec-
trical components.
To Process
connection
RTD
Temperature
transmitter
electrical box