RTHD-SVX01L-EN
41
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. For variable frequency drives
or other energy storing components provided by
Trane or others, refer to the appropriate
manufacturer’s literature for allowable waiting periods
for discharge of capacitors. Verify with a CAT III or IV
voltmeter rated per NFPA 70E that all capacitors have
discharged.
Important: WHEN EVACUATING THE CHILLER’S
REFRIGERANT SYSTEM, ALWAYS HAVE
THE MAIN POWER DISCONNECT/CIRCUIT
BREAKER OPENED. Even when the
compressor is not running, voltage is present
at the compressor motor terminals, providing
the potential for current to flow through a low
impedance path.
NOTICE
Equipment Damage!
Failure to follow instructions below could result in
equipment damage.
When removing refrigerant for the chiller, both the
condenser and chilled water pump must be operating
to avoid freeze up.
NOTICE
Motor Damage!
Failure to follow instructions below could result in
motor damage.
Fully disconnect all power sources before pumpdown
or evacuation procedures, and ensure disconnects
cannot be closed while chiller is in a vacuum.
As the chiller is evacuated below atmospheric pressure,
the dielectric strength (resistance to arcing) of the gaseous
atmosphere is significantly reduced. If this occurs the
circuit breaker (or other external protective devices) will trip
in response to high fault currents, and motor damage may
also occur. To avoid motor damage, verify chiller fully
disconnected from all power sources before beginning
pumpdown or evacuation procedures, and use proper
lockout/tagout procedures to make sure the disconnect
cannot be accidentally closed while the chiller is in a
vacuum.
Module Connections for
Interconnecting Wiring
All connectors can be unplugged or the wires can be
removed from the screw assembly. If an entire plug is
removed, make sure the plug and the associated jack are
marked for proper location identification during re-
installation.
NOTICE
Equipment Failure!
Failure to follow instructions could result in
equipment damage.
Plugs should NOT be reversed with the jacks. Plugs
and jacks must be clearly marked before
disconnecting, because specific plugs will fit into
other jacks.
Interconnecting Wiring (Field Wiring
Required)
Important: Do not turn chiller on or off using the chilled
water pump interlocks.
When making field connections, refer to the appropriate
field layout, wiring, schematics and controls diagrams that
ship with the unit. The diagrams in this manual are typical
only and may not match the unit.
Whenever a contact closure (binary output) is referenced,
the electrical rating is:
At 120 Vac
7.2 amp resistive
2.88 amp pilot duty
1/3 hp, 7.2 FLA, 43.2 LRA
At 240 Vac
5.0 amp resistive
2.0 amp pilot duty
1/3 hp, 3.6 FLA, 21.6 LRA
Whenever a dry contact input (binary input) is referenced,
the electrical rating is 24Vdc, 12 mA.
Whenever a control voltage contact input (binary input) is
referenced, the electrical rating is 120 Vac, 5mA.
Note: Connections denoted with an asterisk require the
user to provide an external source of power. The
115V control power transformer is not sized for
additional load.
Chilled Water Pump Control
Symbio™ 800 has a evaporator water pump output relay
that closes when the chiller is given a signal to go into the
Auto mode of operation from any source. The contact is
opened to turn off the pump in the event of most machine
level diagnostics to prevent the build up of pump heat. To
protect against the build-up of pump heat for those
diagnostics that do not stop and/or start the pump and to
protect against the condition of a bad flow switch, the pump
Installation Electrical
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