Control Power Transformer; Field Installed Ac Control Wiring - Trane Voyager Commercial Installation & Operation Manual

Control Power Transformer

Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
The 24 volt control power transformers are equipped with internal circuit breakers. They are to be
used only with the accessories called out in this manual. If a circuit breaker trips, be sure to turn
off all power to the unit before attempting to reset it.
On units equipped with the VFD option, an additional control power transformer is used. The
secondary is protected with fuses. Should the fuse blow, be sure to turn off all power to the unit
before attempting to replace it.

Field Installed AC Control Wiring

Proper Field Wiring and Grounding Required!
All field wiring MUST be performed by qualified personnel. Improperly installed and grounded
field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow
requirements for field wiring installation and grounding as described in NEC and your local/
state electrical codes. Failure to follow code could result in death or serious injury.
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of conductors. Failure to use copper
conductors may result in equipment damage.
Before installing any connecting wiring, refer to
Note: Resistance in excess of 3 ohms per conductor may cause component failure due to
Be sure to check all loads and conductors for grounds, shorts, and miswiring. After correcting any
discrepancies, reset the circuit breakers by pressing the black button located on the left side of the
transformer.
Table 12. AC Conductors
Distance from unit to control
000-460 feet
461-732 feet
733-1000 feet
RT-SVX34C-EN
WARNING
WARNING
• Use copper conductors unless otherwise specified.
• Ensure that the AC control voltage wiring between the controls and the unit's termination
point does not exceed three (3) ohms/conductor for the length of the run.
insufficient AC voltage supply.
• Refer to dimensional information beginning with
locations provided on the unit.
• Do not run the AC low voltage wiring in the same conduit with the high voltage power supply
wiring.
Table 12, p. 37
Figure 1, p. 17
Recommended wire size
18 gauge
16 gauge
14 gauge
Installation Electrical
for conductor sizing guidelines and;
for the electrical access
37