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Installation Electrical
Connecting Module Power
and Control Wires
Connections are made at the client module, which
typically contains the power distribution panel.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury.
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/national electrical codes.
Labeled control and communication cables are coiled
inside each module and are connected in series (daisy-
chained) to the next module's microprocessor controller at
the J11 connector.
This unit is equipped with a flow switch. The chiller will not
run unless the pump is circulating water through the
system.
Chiller Module Main Power
Modular systems feature single-point power connection
from the utility service to the power distribution panel on
the client module as standard. Main power phases A, B,
and C are connected to terminals A, B, and C respectively
from left to right. Some systems have individual power
supplied to each module in lieu of single point power.
Phase Monitor Installation
The chiller is equipped with a phase monitor on the power
distribution panel. It communicates with the client
microprocessor controller on the client module electrical
and control panel via the ID8 terminal. Ensure that the
wiring from the client microprocessor controller and
terminal blocks to the phase monitor are connected and
secure.
The phase monitor continuously monitors each of the
three phases. The microprocessor receives input from the
phase monitor indicating whether the voltage is within
acceptable values. The phase monitor is designed to
protect against under-voltage, voltage imbalance, phase
loss, and phase reversal.
Set voltage adjustment knob at the desired operating line
voltage for the equipment. This adjustment automatically
sets the under-voltage trip point. Check the phase monitor
after initial startup. If it fails to energize, (the LED glows red
or blinks) check the wiring of all three phases, voltage, and
phase sequence. If phase sequence is incorrect, the LED
20
flashes green/red. To correct this, swap any two line
voltage connections at the mounting socket. No further
adjustment should be required.
Power Interlock Switch
Some Manhattan™ Gen II Chiller systems are optionally
equipped with a panel-mounted disconnect switch
installed on the outside of the power distribution panel.
The disconnect switch must be turned to the OFF position
before the panel can be opened for service.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
Single Point Connections
For systems with single point power connections, detach
the power cable on each module by cutting the wire tie
installed for shipping.
1. Uncoil the power cable and snake it through each
module to reach the power distribution panel.
2. Feed the taped end of the cable through the round
opening on the extreme left of the power distribution
panel.
3. Remove the tape and connect and tighten the cable
ends to the breaker corresponding to the module
number being connected. (For example, connect the
cable for module #9 to the breaker labeled #9.)
4. Connect the green ground lead to the ground lug at the
base of the enclosure.
5. Do not secure the ground wire until all of the ground
wires are connected to the ground lug and then each
can be tightened.
6. After connection, secure all power cables with
standard wire ties.
Module Control Wiring
The client controller communicates with the server
controller in each chiller module via a communication
circuit. Each server controller is wired back to the Ethernet
switch on the client microprocessor controller.
ARTC-SVX002A-EN
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