Controls Interface
ARTC-SVX002A-EN
43
Main Power Distribution
The power distribution panel distributes electricity from
the external building power supply. It also houses
breakers, phase monitor, and a built-in interface panel
(and, potentially, an optional door-mounted client power
disconnect switch). See below figure.
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 above figure.
Electrical Controls
The Manhattan™ Gen II Chiller is provided with robust set
of controls and indicators to monitor the electrical activity
and notify operators if problems arise.
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:
Figure 22.
Power distribution panel
Figure 23.
Module electrical panel
