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Wiring for power
TruVu™ VAVB3
-E2
CARRIER CORPORATION ©2022
Installation and Start-up Guide
All rights reserved
15
To wire for power
1
Remove power from the power supply.
2
Remove the TV-VAVB3-E2's cover.
3
Pull the red screw terminal connector from the controller's power terminals labeled
24V
.
4
Connect the power supply's wires to the red screw terminal connector.
5
Connect an 18 AWG or larger wire from the power supply's negative (-) terminal to earth ground. This wire
must not exceed 12 in. (30.5 cm).
6
Apply power to the power supply.
7
Measure the voltage at the red screw terminal connector to verify that the voltage is within the operating
range of 20.4 to 28.8 Vac or 21.6 to 28.8 Vdc.
8
To verify the polarity of the wiring, measure the voltage from the negative terminal of the red screw terminal
connector to a nearby ground. The reading should be 0V.
9
Insert the red screw terminal connector into the controller's power terminals.
10
Verify that the
LED on top of the controller is on.