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C C o o n n t t r r o o l l s s I I n n t t e e r r f f a a c c e e
Main Power Distribution
The power distribution panel distributes electricity
from the external building power supply. It also houses
breakers, phase monitor, and may include a door-
mounted system disconnect switch. See below figure.
Figure 22. Power distribution panel
Panel Disconnect
Some Manhattan™ Gen II Chiller systems are
optionally equipped with a panel-mounted disconnect
switch installed on the outside of the power
distribution panel (or on each module's electrical and
control panel if the chiller has power supplied directly
to each individual module). The disconnect switch
must be turned to the OFF position before the panel
can be opened for service.
Module Electrical and Control Panel
From the power distribution panel, power is fed to the
individual chiller modules and connects to each
module's electrical and control panel. See the following
figure.
Electrical Controls
The Manhattan™ Gen II Chiller is provided with
controls and indicators to monitor the electrical activity
and notify operators if problems arise.
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Figure 23. Module electrical and control panel
Flow Switch
A flow switch is wired into the low voltage control
circuitry used to detect the flow of liquid throughout
the hydronic system. Flow switches are found on all
evaporators with isolation valves. Flow switches close
when flow is detected allowing compressors to start. If
there is no flow, compressors cannot operate.
After every chiller power-on, all LEDs on the flow
switch illuminate and go out again in sequence. The
switch is ready for operation when an amber LED is
visible on the switch display:
ARTC-SVX001B-EN
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