Electrical Field Connections; Electrical Field Connections-Downflow Models; Figure 6-1 Electrical Field Connections, Downflow, Cw026 - Cw084 - Emerson CW026 Design Manual

6.0 Electrical Field Connections

6.1 Electrical Field Connections—Downflow Models
Figure 6-1 Electrical field connections, downflow, CW026 – CW084
Field supplied disconnect switch when factory installed unit disconnect switch is not provided.
Select per national and local codes.
Factory installed
unit disconnect
switch (optional)
3 phase electric service
not by Liebert.
Three phase connection. Electric
service connection terminals when
factory disconnect switch is supplied.
Factory installed disconnect
switch (optional ). May be fused
disconnect with internal fuses.
Three phase electric service not
by Liebert.
Electric conduit knockouts on bottom of
electric box. Knockouts sizes 1-3/8"
(35mm) or 1-3/4" (45mm) or 2-1/2"(64mm).
Electrical handy box factory
installed with cover.
Common alarm connection. Field
supplied 24V. Class 2 wiring to
common alarm pigtails 75 + 76
which are factory connected to
common alarm relay (R3).
Remote unit shutdown. Replace
existing jumper between terminals
37 + 38 with normally closed switch
having a minimum 50VA rating. Use
field supplied 24V Class 2 wire.
Smoke detector alarm connections. Field supplied 24V. Class 2 wire to remote alarm circuits.
Factory wired terminals from optional smoke detector are #91-comm., #92-NO, and #93-NC.
NOTE: Refer to specification sheet for full load amp and wire size amp ratings.
Electrical Field Connections—Downflow Models
MONITORING
PANEL
Three phase connection.
Electric service connection
terminals when factory fused
disconnect switch is supplied.
67
Fused disconnect view
Three phase connection (50Hz).
Electrical service connection
terminals when factory disconnect
switch is NOT supplied.
Earth ground connection (60HZ).
Connection terminal for field supplied
earth grounding wire.
Main fuseblock and fuses not present
when fused disconnect installed
or on 50Hz units.
Intellislot Housings. Optional Monitoring
and Communication cards inserted here.
Three Phase Connection (60Hz).
Electric service connection point when
factory disconnect is NOT supplied.
Earth ground bar (on 50HZ only).
Connection terminals with factory ground
from each high voltage component for
field supplied earth grounding wire.
Special alarm connections. Field supplied
24V. Class 2 wire for special alarms.
® ™
Liebert CW System Design Manual
DPN003198
Pg. 1 Rev. 1