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Table 23. Unit control panel wiring 120 Vac (continued)
®
®
BACnet
or MODBUS
LON Interface
Right Hand Control Panel
Optional Low Voltage Circuits
% RLA Compressor 2 Output (Circuit 2
Right Panel 1K5)
External Condenser Pressure Output
(Circuit 2 Right Panel 1K5)
Note: All wiring to be in accordance with National Electrical Code (NEC) and any local codes.
(a)
If the Chilled Water Flow Proving Input is a factory-installed ifm efector flow-sensing device, the secondary field device (recommended with 38°F [3.3°C] and lower leaving
chilled water temperatures) for proof of flow connects from 1X1-5 to 1K26-4 (binary input; normally open, closure with flow). Remove factory jumper when used.
(b)
If the Condenser Water Flow Proving Input is a factory-installed ifm efector flow-sensing device, the secondary (optional) field device for proof of flow connects from 1X1-6 to
1K27-4 (binary input; normally open, closure with flow). Remove factory jumper when used.
(c)
Standard low-voltage circuits (less than 30 Vac) must be separated from 120 Vac or higher wiring.
Water Pump Interlock Circuits
and Flow Switch Input
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. Verify that no power is
present with a voltmeter.
CDHH-SVX003C-EN
1K1–P1 Left Panel
1K25 Left Panel
1K5-J2-1 to 3 Right Panel
1K5-J2-4 to 6 Right Panel
System Control Circuit Wiring (Field Wiring)
®
Communication to BACnet
or
®
MODBUS
®
Communication to LonTalk
Analog Output
Analog Output
Note: Graphic labels (shown above) are used for CE
application only.
Important:
•
Before servicing, disconnect all power
sources and allow at least 30 minutes for
capacitors to discharge.
•
All electrical enclosures—unit or remote—
are IP2X.
Note: The circuits for the chilled water proof of flow and the
condenser water proof of flow do NOT require
external power. Refer to the wiring diagrams that
shipped with the chiller.
(As Ordered; See Sales Order)
(As Ordered; See Sales Order)
2–10 Vdc
2–10 Vdc
X39003892001A
71
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