Connecting 24 Vac Secondary Wires - Trane Tracer UC400 Installation, Operation And Maintenance Manual

W W i i r r i i n n g g I I n n s s t t a a l l l l a a t t i i o o n n
I I m m p p o o r r t t a a n n t t : : The controller must receive AC power from a dedicated power circuit. Failure to

Connecting 24 Vac Secondary Wires

1. Connect the 24 Vac secondary wires from the transformer to the 24 Vac and terminals on the
2. Connect the 24 Vac secondary wires from the transformer to the 24 Vac and ground terminals
3. Ground the unit using one of the following methods:
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comply may cause the controller to malfunction. Do Not run AC power wires in the
same wire bundle with input/output wires. Failure to comply may cause the
controller to malfunction due to electrical noise.
UC400 Controller (refer to the illustration below). Perform one of the following methods to
ensure the controller is adequately grounded:
a. Connect a grounding pigtail at some point along the secondary wire that runs between
the controller terminal and the transformer.
b. Ground one of the terminals on the controller to the enclosure (if the enclosure is
adequately grounded) or to an alternate earth ground.
on the controller as shown below.
Figure 15. Connecting 24 Vac Secondary Wires for UC400 and UC400-B
24 Vac
Transformer
IM C
24
VAC
XFRM
AO1
BI 4
1
ADDRESS
RELAYS
BO1 BO2
x1
NO NC C NO NC
1 2 3 4 5
J15
Phoenix
Alternate
Ground
Method
24 Vac
Transformer
N N o o t t e e : : The UC400-B is grounded through mounting screws so external grounded is not
required.
a. Connect a grounding pigtail at some point along the secondary wire that runs between
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 Ground Method
24 24
VAC VAC
BI 1 BI 2 BI 3
AO2
UI 1 UI 2 AI 1 AI 2 AI 3
BI 5
BO1 BO2 BO3 BO4 BO5 BO6 BO7 BO8 BO9
CONNECT AC POWER TO THE TRAIC SUPPLY TO POWER THE TRIACS
TRIAC SUPPLY
BO3
C NO NC C A B BO4
6 1 2 3 4 5 6
J16
Phoenix
IM C
+ 24
VDC
LINK IMC
AI 4 AI 5
P 1 P 2
LINK IMC
TX
RX
SERVI C E
SERVICE TOOL
TRIACS
BO5 BO6 BO7 BO8 B BO9 A
BAS-SVX48H-EN