Wiring For Power; To Wire For Power - Carrier TruVu UC253-V Installation And Startup Manual

Wiring for power

Wiring for power
WARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals.
CAUTIONS
•
The TV-UC253-V is powered by a Class 2 power source. Take appropriate isolation measures when mounting
it in a control panel where non-Class 2 circuits are present.
•
Carrier controllers can share a power supply as long as you:
•
Maintain the same polarity.
•
Use the power supply only for Carrier controllers.

To wire for power

Remove power from the power supply.
1
Pull the red screw terminal connector from the controller's power terminals labeled 24V.
2
Connect the power supply's wires to the red screw terminal connector.
3
Connect an 18 AWG or larger wire from the power supply's negative (-) terminal to earth ground. This wire
4
must not exceed 12 in. (30.5 cm).
Apply power to the power supply.
5
Measure the voltage at the red screw terminal connector to verify that the voltage is within the operating
6
range of 20.4 to 28.8 Vac or 21.6 to 28.8 Vdc.
To verify the polarity of the wiring, measure the voltage from the negative terminal of the red screw terminal
7
connector to a nearby ground. The reading should be 0V.
Insert the red screw terminal connector into the controller's power terminals.
8
Verify that the
9
TruVu™ UC253-V
Installation and Start-up Guide
LED on top of the controller is on.
8
©2022 Carrier.
All rights reserved.