Filter
Top Products
Installation
11
2.6 Electrical Connections
Three-phase electrical service is required for all models in either 208, 230, 460, or 575 V, 60 Hz; or
200, 230, or 380/415 V, 50 Hz. Electrical service shall conform to national and local electrical codes.
Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to elec-
trical schematic when making connections.
A manual electrical disconnect switch should be installed within 5 feet (1.6 m) of the Liebert Chal-
lenger ITR in accordance with codes. A factory-supplied, locking disconnect switch is factory-mounted
within the unit behind the front door.
NOTICE
Three-phase power must be connected to the Liebert Challenger ITR line voltage terminals in
the proper sequence so that scroll the compressor rotates in the proper direction.
Figure 8 Electrical connections
1. Electric conduit knockouts on top and bottom of electric box. Knockout size 1-3/4" (44.5mm).
2. Three phase connection. Electric service connection terminals when factory disconnect switch
is supplied.
3. Factory-installed locking disconnect switch.
4. Three-phase electric service not by Liebert.
5. Earth ground connection (50/60Hz). Connection terminal for field-supplied earth grounding wire.
6. Earth ground bar (50Hz only). Connection terminals with factory ground from each high
voltage component for field supplied earth grounding wire.
7. Control and monitoring section of electric box.
8. 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.
!
WARNING
Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power before working within the unit. Use a voltmeter
to make sure power is turned off before making any electrical connections.
75
76
82
83 84 85 88 89
91
92 93 94 95 96
97 1
37C 38C37B 37 38 24 50 51 55 56
77 78
4
7
2
3
4
5
71
70
15
6
11
13
12
17
16
14
1310
9
8
8
9
1
1
2338B
Terminal Block*
(for customer connections)
Electrical Handy Box*
(factory-installed with cover)
DPN001524
REV 0