Conair Thermolator TW-S User Manual page 104

Re pl a ci ng RT Ds
WARN I NG : H o t S ur face s
Allow the Thermolator to cool to below 100° F {38° C} before servicing the unit.
To replace an RTD:
1
Disconnect and lockout the main power.
2
Shut off the cooling water in and drain the unit. Drain
water to below the RTD level using the handle on the Pres-
sure Relief Valve located the bottom of the unit.
3
Remove the unit's top panel and open the electrical
enclosure.
4
Remove the RTD. Loosen the compression nut to slide the
RTD out of the casing. Disconnect the RTD wires at the
terminal strip. Note locations of wires before disconnecting.
Remove wire ties.
5
Install the new RTD. Insert the tip of the new RTD at least
1 inch into the tank. Tighten the compression nut. Thread
the leads through the raceway leading to the electrical enclo-
sure.
6
Re-secure RTD wires to the various wire mounts to keep the wire from contacting
the heater housing, pump casing, or motor housing. Wire
the RTD wires to secure them within the electrical cabinet.
7
Trim extra wire off, if possible. Strip and attach RTD
leads to the terminal strip at locations noted in step 4.
Polarity does not matter.
IMPORTANT: Always refer to the wiring diagrams that came with your Thermo-
lator to locate specific electrical components. Illustrations in the User Guide are
intended to be representative only.

NOTE: You may want to test the resistance of the new RTD to ensure it
aligns with the table in the previous section.
6-32 I Tr o u b l e sh o o ti n g
Nut
Discharge
Side RTD
Bypass/de-aeration line
Nut
Pressure Switch
Suction Side RTD