Installer-Supplied Components; Remote Evaporator Only; Power Supply Wiring; General - Trane RTAA-130 Installation, Operation And Maintenance Manual

Installer-Supplied
Components
Caution: Customer wiring interface
connections are shown in the
electrical schematics and
connection diagrams that are
shipped with the unit.
The installer must provide the
following components if not ordered
with the unit:
[ ] Power supply wiring (in conduit) for
all field-wired connections.
[ ] All control (interconnecting) wiring
(in conduit) for field supplied
devices.
[ ] Fused-disconnect switches.
[ ] Power factor correction capacitors.

Remote Evaporator Only:

Control wiring between the outdoor
unit and the evaporator terminal box.
RTAA-IOM-3

Power Supply Wiring

General

All power supply wiring must be sized
and selected accordingly by the project
engineer in accordance with NEC Table
31016.
WARNING: To prevent injury or
death, disconnect electrical
power source before completing
wiring connections to the unit.
All wiring must comply with local
codes and the National Electrical Code.
The installing (or electrical) contractor
must provide and install the system
interconnecting wiring, as well as-the
power supply wiring. It must be
properly sized and equipped with the
appropriate fused disconnect switches.
The type and installation location(s) of
the fused disconnects must comply
with all applicable codes.
Caution: Use only copper
conductors for terminal
connections to avoid corrosion or
overheating.
Remove the plate on the lower right
side of the power connection panel and
cut holes for the appropriately-sized
wiring conduits. The wiring is passed
through these conduits and connected
to the terminal blocks or optional unit-
mounted disconnect. Refer to Figure 1
and Figures 34 thru 36.
To provide proper phasing of 3-phase
input, make connections as shown in
Figures 34 thru 36 and as stated on the
yellow WARNING label in the starter
panel. For additional information on
proper phasing, refer to "Unit Voltage
Phasing Proper equipment ground
must be provided to each ground
connection in the panel (one on 460/
575 volt units and two on 200/230 volt
units).
CAUTION:
IT IS IMPERATIVE THAT
L1-L2-L3 IN THE STARTER BE
CONNECTED IN THE A-B-C
PHASE SEQUENCE TO
PREVENT EQUIPMENT
DAMAGE DUE TO REVERSE
ROTATION.
68

Control Power Supply

If the unit is equipped with the optional
control power transformer, it is not
necessary to provide control power
voltage to the unit.
Caution: 200/230 volt units are
factory connected as 200 volt units.
For 230 volt units, the leads must
be moved to the appropriate
terminals on the transformer (1T1).
See Unit Wiring Diagrams.
If the transformer is not provided,
connect control power (115V, 750VA, 15
amp maximum fuse size) to terminals
1TB3-1 and 1TB3-2, on 130-200 units.
Use 1TB3-1 and 1TB4-1 on 240-400
units.

Heat Tape Power Supply

(Packaged Units Only)

Note: Units with the Remote
Evaporator option do not have heat
tape.
The evaporator shell and optional
Domestic Water Heater are insulated
from ambient air and protected from
freezing temperatures by a
thermostatically-controlled heat tape.
Whenever the water temperature
drops to approximately 37 F, the
thermostat energizes the heat tape. The
heat tape will provide protection from
ambient temperatures down to -20 F.
Provide an independent power source
(115V, 15 amp), with a fused-
disconnect. The heat tape is factory
wired back to the unit control panel.
Customer connections are made on
terminal strip 1TB3-11 and 1TB3-12 on
130-200 units or 1TB3-10 and 1TB4-1 0
on 240-400 units.

Water Pump Power Supply

Provide power supply wiring with
fused disconnect for the chilled water
pump(s).

Auxiliary Heat Tape Power Supply

Provide power wiring and properly
sized fused-disconnect for any electrical
heat tape installed on the system water
piping.