Installation manual

Installation
14
Figure 9 Electrical field connections
NOTE
Refer to specification sheet for full load amp and wire size amp ratings.
Monitoring panel
Field-supplied disconnect switch when factory-installed
unit disconnect switch is not provided
Field-wired to components
on electric panel
Electric connection block
3-phase connection; electric service
connection terminals when factory
disconnect switch is not supplied
3-phase
electric
service
not by
Liebert
Factory-installed disconnect
switch (optional)
3-phase connection; electric
service connection terminals
when factory disconnect switch
is supplied
Smoke detector alarm
connections; field-supplied 24V;
Class 2 wire to remote alarm
circuits; factory-wired contacts
from optional smoke detector are
#91-comm., #92-NO and #93-NC
Common alarm connection;
field-supplied 24V; Class 2 wire
to common alarm from pigtails
75 +76, which are
factory-connected to common
alarm relay (R3)
Electric handy box
factory-installed
with cover
Heat rejection connection;
field-supplied 24V; Class 1 wiring
to interlock heat rejection from
pigtails 70 and 71, which are
factory-connected to compressor
side switches
Remote unit shutdown; replace existing
jumper between Terminals 37 and 38 with
a normally closed switch having a
minimum 50VA rating; use field-supplied
Class 1 wire
Condensate pump connection for
pumps shipped loose; factory-supplied
wiring from pump to pigtails; fuses are
installed on electric panel
Earth ground bar (50Hz only); connection
terminals with factory-ground from each
high-voltage component for field-supplied
earth grounding wire
Earth ground connection (60Hz);
connection terminal for field-supplied
earth grounding wire
3-phase electric service not by Liebert
Special alarm connections; field-supplied 24V, Class 1
wire for special alarms; connections made by adding
normally open contact between terminals (24 & 50) for
standard microprocessor; advanced microprocessor
has four alarms at terminal: 24 & 50; 24 & 51; 24 & 55
and 24 & 56
Site monitoring connection; terminals 77(-) and 78(+)
are for connection of a 2-wire, twisted-pair
communication cable (available from Liebert or
others) to optional SiteScan and are
factory-connected to the interface board on the unit
Analog inputs; optional terminals 41 to 48 provide
connections for shielded, twisted-pair cable to as
many as four customer supplied analog sensors
(AM and AG only)
Electric conduit knockouts on bottom and
rear of wire raceway; knockout sizes are
1-3/8" (34.9mm) or 1-3/4" (44.5mm) or
2-1/2" (63.5mm)
Factory-installed unit
disconnect switch (optional)
DPN000538 Rev1
DISCONTINUED
PRODUC T