Liebert PX018 Installer's/User's Manual page 116

1. High Voltage Entrance. Supplied on top and bottom of electric box. Knockout size Ø1.75in (44.5mm).
2. Low Voltage Entrance. Ø1.375 in. (34.9mm) hole located on bottom of Electric Box.
3. Three phase Electric Service and earth ground. Field supplied.
4. Three phase connection. Electric service connection terminals on disconnect.
5. Factory installed disconnect switch. Fused disconnect switch provided on units.
6. Earth ground connection. Connection terminals for field supplied earth grounding wire.
7. Earth ground bar. Connection terminals with factory ground from each high voltage component for field supplied earth
grounding wire.
8. Control and monitoring section of electric box.
9. Remote unit shutdown. Replace existing jumper between terminals 37 & 38 with normally closed switch having a minimum
75VA, 24VAC rating. Use field supplied Class 1 wiring. Two additional contact pairs available as an option (labeled as 37B &
38B, 37C & 38C). Replace existing jumper for appropriate pair as done for 37 & 38.
10. Remote Alarm Device (RAD) Connections. Alarm connections may be factory wired or field wired. See schematic, RAD1-
4, for factory wired alarms. For field wired alarms, use Class 1 wiring to connect normally open contacts between terminals
24 & 50, 24 & 51, 24 & 55, or 24 & 56. Suitable for 24VAC.
11. Smoke detector alarm connections. Field supplied Class 1 wiring to 1 Amp, 24VAC maximum remote alarm circuits.
Factory wired contacts from optional smoke detector are #91-Common, #92-NO, and #93-NC. Optional smoke detector
trouble (SDT) connections #80 & # 81.
12. Common alarm connection. Field supplied Class 1 wiring to common alarm terminals 75 & 76 (and optional 94 & 95, and
96 & 97), which are factory connected to normally open contacts, 1 Amp, 24VAC maximum on common alarm relay (R3).
13. Heat rejection connection. Field supplied Class 1 wiring to heat rejection interlock terminals 70 & 71 which are factory
connected to normally open compressor side switch (self contained units only) or to GLYCOOL relay K11 (GLYCOOL units
only). On Dual Cool units only, connect auxilliary cooling source terminals 72 & 73 to relay K11. See indoor and outdoor
electric schematic for more information.
14. Reheat and Humidifier Lockout. Optional emergency power lockout of reheat and/or humidifier: Connections #82 & #83 are
provided for remote 24VAC source and Class 1 wiring by others.
15. Main Fan Auxiliary Switch. Optional main fan auxiliary side switch. Terminals located on customer connection terminal
block for remote indication that the evaporator fan motor/unit is on. Field to connect 24V maximum, Class 1 wiring to
connections #84 & #85.
16. Optional Condensate Alarm (Dual Float Condensate Pump only). Relay terminals located on customer connection
terminal block for remote indication. Field supplied Class 1 wiring to connections #88 & #89.
17. Optional Remote Liquitect Indicator. Optional remote liquitect indicator for unit shutdown. Terminals located on customer
connection terminal block. Field to connect 24V maximum, Class 1 wiring to connections #58 & #59.
18. Optional Analog Inputs #3 & #4. Customer connection to terminals 41, 42, 43, 44 for analog inputs.
19. Spare Terminals for Optional Devices. Customer connection when optional device is supplied. See unit schematic.
DPN002933
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LIEBERT PDX & PCW
ELECTRICAL FIELD CONNECTIONS
UPFLOW & DOWNFLOW MODELS
REV : 3
REV DATE : 12/16