Trane R Series, Установка, эксплуатация и обслуживание

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62 RLC-SVX07A-EN
Installation - Electrical
Installer-Supplied Components
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.
Power Supply Wiring
All power supply wiring must be sized and selected accordingly by the project
engineer in accordance with National Electric Code.
All wiring must comply with local codes and the National Electrical Code. The
installing (or electrical) contractor must provide and install the system inter-
connecting 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.
Cut holes for the appropriately-sized wiring conduits in the upper right side of
the power connection panel on the RTWA and RTUA units. The wiring is
passed through these conduits and connected to the terminal blocks or
optional unit-mounted disconnect. Refer to Figures
3 thru 6 and Figures 8 and
9 .
For the RTCA units, refer to Figure 11 for the power supply wiring hole
location.
Control Power Supply
The RTWA and RTUA units are equipped with a control power transformer. It
is not necessary to provide control power voltage to these units.
Water Pump Power Supply
Provide power supply wiring with fused-disconnect for the chilled water
pump(s) (RTWA and RTUA) and condenser water pump(s) (RTWA only).
Interconnecting Wiring
Chilled Water Pump
CAUTION
Equipment Damage!
The chiller water pump must operate for a minimum of one
minute after the UCM receives a command through the external
Auto/Stop input to shut down the chilled water system. Do not
use the proof of chiller water flow interlock (1U1 TB3-1 and -2) by
itself as the normal means of terminating chiller operation. Failure
to continue pump operation for one minute after unit shut down
may result in evaporator freeze up.
On the RTWA and RTUA units, the controller will initiate the “RUN:UNLOAD”
mode to terminate a cycle from any of the following:
- STOP key pressed
- Loss of load