Section 12. Electrical - High Voltage - Trane 4TTR6024N Installation And Operation Manual

With Furnace
Thermostat
24 VAC HOT
FAN
24 VAC B/C
Common
COOL
HEATING
*
• Units with pigtails require wirenuts for connections. Cap all unused wires.
• In AC systems for multiple stages of heat, jumper W1 and W2 together if comfort control has only one stage of heat.
* If equipped with second stage heat
** When using a BK enabled comfort control, cut BK jumper and bypass Y and YLo at the furnace. Connect BK from comfort control to
BK of the furnace

Section 12. Electrical - High Voltage

12.1 High Voltage Power Supply
!
WARNING
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and
troubleshooting of this product, it may be nec-
essary to work with live electrical components.
Failure to follow all electrical safety precau-
tions when exposed to live electrical compo-
nents could result in death or serious injury.
The high voltage power supply must agree with
the equipment nameplate.
Power wiring must comply with national, state,
and local codes.
Follow instructions on unit wiring diagram located
on the inside of the control box cover and in the
Service Facts document included with the unit.
12.2 High Voltage Disconnect Switch
Install a separate disconnect switch at the
outdoor unit.
For high voltage connections, flexible electri-
cal conduit is recommended whenever vibra-
tion transmission may create a noise problem
within the structure.
18-AC98D1-7D-EN
Outdoor
Furnace
Unit
R R
G G
B B
Y1 Y Y
W1
W1
W2 W2
With Variable Speed Furnace
Thermostat Furnace
R R
24 VAC HOT
G G
FAN
24 VAC B/C B
Common
O
Y1 Y
COOL
**
Y
LO
W1 W1
HEATING
W2 W2
*
BK
BK
**
Outdoor
Unit
B
Y
13