Installer-Supplied Components - Trane CGAM Installation & Operation Manual

Installation - Electrical

Installer-Supplied Components

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.
• Circuit breakers.
Power Supply Wiring
WARNING
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.
All power supply wiring must be sized and selected
accordingly by the project engineer in accordance with
NECTable 310-16.
WARNING
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.
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.
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of
conductors. Failure to use copper conductors could
result in equipment damage.
Knock-outs for wiring are located on the bottom right side
of the control panel.The wiring is passed through these
70
conduits and connected to the terminal blocks or HACR
type breakers. Refer to Table 35.
To provide proper phasing of 3-phase input, make
connections as shown in field wiring diagrams and as
stated on the WARNING label in the starter panel. For
additional information on proper phasing, refer to
Voltage Phasing, " p. 122. Proper equipment ground must
be provided to each ground connection in the panel (one
for each customer-supplied conductor per phase).
The high voltage field-provided connections are made
through knockouts on the right side of the panel.The low
voltage connections are made through the left side of the
panel (Figure 35). Additional grounds may be required for
each 115 volt power supply to the unit. Green lugs are
provided for 115V customer wiring.
Control Power Supply
The unit is equipped with a control power transformer; it
is not necessary to provide additional control power
voltage to the unit. No other loads should be connected to
the control power transformer.
All units are factory-connected for appropriate labeled
voltages.
NOTICE:
Equipment Damage!
Control panel main processor does not check for loss of
power to the heat tape nor does it verify thermostat
operation. A qualified technician must verify power to
the heat tape and confirm operation of the heat tape
thermostat to avoid catastrophic damage to the
evaporator or partial heat recovery heat exchanger.
Heater Power Supply
For units with freeze protection selected (model number
digit 18 is "1"), the evaporator shell is insulated from
ambient air and protected from freezing temperatures by
a thermostatically-controlled immersion heaters. When
the ambient temperature drops to approximately 37°F
(2.8°C) the thermostat energizes the heaters.The heaters
will provide protection from ambient temperatures down
to -20°F (-29°C).
It is required to provide an independent power source
(115V 60-Hz-20 amp, 50Hz-15 amp), with a fused-
disconnect to the heaters.The heaters are factory-wired
back to the unit control panel.
Note: If evaporator is drained, the heater must be turned
off in order to avoid damaging the evaporator.The
heater should only be on when the evaporator has
water in it.
"Unit
CG-SVX17E-EN