Wiring Requirements; Connecting The Wires - Trane Tracer Uc

Wiring Installation

Wiring Requirements

To ensure proper operation of the UC400 controller, install the power supply circuit in accordance
with the following guidelines:
•
•
•
•

Connecting the Wires

Referring to
1. Disconnect power to the transformer.
2. Connect the 24 Vac secondary wires from the transformer to the 24 Vac and
3. Choose one of the following options to ensure the controller is adequately grounded:
Figure 2. Connecting 24 Vac transformer and ground
20
The controller must receive AC power from a dedicated power circuit.
Important: Failure to comply may cause the controller to malfunction.
A dedicated power circuit disconnect switch must be near the controller, easily accessible by
the operator, and marked as the disconnecting device for the controller.
DO NOT run AC power wires in the same wire bundle with input/output wires.
Important: Failure to comply may cause the controller to malfunction due to electrical noise.
2
18 AWG (0.823 mm ) copper wire is recommended for the circuit between the transformer and
the controller.
Figure 2:
the UC400 controller.
• Connect a grounding pigtail at some point along the secondary wire that runs between the
controller terminal and the transformer.
• Ground one of the
adequately grounded) or to an alternate earth ground.
24 Vac
transformer
IM C
1
BO1
x1
NO NC
terminals on the controller to the enclosure (if the enclosure is
A pigtail connection may be
necessary between earth ground
and/or enclosure ground if the device
is not grounded through one leg of
the transformer wiring.
Alternate earth ground method.
24 24 24
VAC VAC VAC
XFRM BI 1 BI 2 BI 3
AO1 AO2
UI 1 UI 2 AI 1 AI 2 AI 3
BI 4 BI 5
ADDRESS
BO1 BO2 BO3 BO4 BO5 BO6 BO7 BO8 BO9
CONNECT AC POWER TO THE TRAIC SUPPLY TO POWER THE TRIACS
RELAYS TRIAC SUPPLY
BO2 BO3
C NO NC C NO NC C A B
IM C
+ 24
VDC
LINK IMC
AI 4 AI 5
P 1 P 2
LINK IMC
TX
RX
SERVI C E
SERVICE TOOL
TRIACS
BO4 BO5 BO6 BO7 BO8 B BO9 A
terminals on
VAV-SVX07B-EN