Main Unit Power - Trane RRU150F N Series Installation, Operation And Maintenance Manual

Installation
must be within 10 percent of the rated voltage stamped on
the nameplate. Use only copper conductors to connect the
power supply to the unit.

Main Unit Power

WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. Verify with an appropriate
voltmeter that all capacitors have discharged.
Standard Wiring
The electrical service must be protected from over current
and short circuit conditions in accordance with NEC
requirements. Protection devices must be sized according
to the electrical data on the nameplate.
1. Location of the applicable electrical service entrance is
illustrated in Figure 2, p. 14
Complete the unit's power wiring connections onto
either; the main terminal block HTB1 inside the unit
control panel, the factory mounted nonfused
disconnect switch (UCD) or circuit breaker (UCB), or
the electric heat terminal block. Refer to the customer
connection diagram that shipped with the unit for
specific termination points.
2. Provide proper grounding for the unit in accordance
with local and national codes.
Main Unit Power
1. Location of the applicable electrical service is
illustrated below. Refer to the customer connection
diagram that is shipped with the unit for specific
termination points. The termination points, depending
on the customer option selected would be a factory
mounted nonfused disconnect switch (UDC).
2. Provide proper grounding for the unit in accordance
with local and national codes.
3. If not provided as a part of this unit, an electric
disconnect switch (see unit nameplate for rated
voltage and ampacity) shall be installed in accordance
with Article 430 of the National Electrical Codes, ANSI/
NFPA 70.
24
and Figure 3, p. 14.
Field Installed Control Wiring
An overall layout of the various control options available
with the required number of conductors for each control
device is illustrated in Figure 9, p. 26
Note: All field wiring must conform to NEC guidelines as
well as state and local codes.
Control Power Transformer
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. Verify with an appropriate
voltmeter that all capacitors have discharged.
The 24-volt control power transformers are to be used only
with the accessories called out in this manual.
Transformers rated greater than 50 VA are equipped with
internal circuit breakers. If a circuit breaker trips, turn "Off"
all power to the unit before attempting to reset it.
The transformers are located in the control panel. The
circuit breaker is located on the left side of the
transformers and can be reset by pressing in on the black
reset button.
and Figure 10, p. 27.
RRU-SVX02F-EN