McQuay WMC-B 145D, Installation Manual, Page: 18 / 53

18 IM 1128-2
Figure 19
Unit panel sensor locations .................................... Figure 16 and Figure 17
Flow switch wiring detail ...................................... Figure 20
9. If the unit has been ordered with a starter or VFD as unit mounted, brackets for mounting it and
interconnection cables to the compressor motor will be included as ship loose items. Control wiring as
shown in Figure 9 will also be required. If the unit has a free-standing starter, use normal field
procedures for mounting and wiring.
Normal procedure of leak testing, triple evacuation, and charging with refrigerant and lubricant must be
followed prior to the start up procedure.
10. Insulate the compressor, suction line, and other miscellaneous areas with the included insulation and
glue after leak testing. See Field Insulation Guide on page 29.
This completes the reassembly procedure.
Figure 11, Liquid Line Installation
NOTE: The bottom two liquid lines show the typical arrangement with electronic expansion valves. Liquid flow can
be in different directions depending on the valve size.
SHOWN IS E36/C36 STACK
WITH 20-INCH MOTOR
R331311306C0100
VIEW B
SEE VIEW B
TOP OF
EVAPORATOR
FROM PILOT
TX VALVE
EVAPORATOR
CONNECTION
CONDENSER
SHUTOFF VALVE
CONNECTION
TO TOP OF
EVAPORATOR
TO TOP OF
EVAPORATOR
EVAPORATOR
CONNECTION
CONDENSER
SHUTOFF VALVE
CONNECTION
FLOW
FLOW
PLUG
EVAP. BLOCKOFF
LIQUID LINES
(NOT ALL
VARIATIONS
SHOWN)
LIQUID
LINES
FLOW
FLOW
(VIEW 'B')
(VIEW 'B')
LIQUID LINE
LIQUID LINE
PILOT LINE
PILOT LINE
RESWEAT PILOT LINE
ABOVE THE SHUTOFF
VALVE
RESWEAT PILOT LINE
ABOVE THE SHUTOFF
VALVE
PILOT LINE
SHUT OFF
VALVE
MECHANICAL
BREAK POINT
MECHANICAL
BREAK POINT
MECHANICAL
BREAK POINT
MECHANICAL
BREAK POINT
CONDENSER
SHUTOFF
VALVE
TYPE II
KNOCKDOWN
ONLY