Carrier WeatherExpert 50LC Installation Instructions Manual page 13

unit disconnect. On a unit without a unit- - mounted
disconnect, connect the source leads to compressor
contactor C and indoor fan terminal block (IFTB) pressure
lugs with unit field power leads.
Refer to Fig. 28 for power transformer connections and
the discussion on connecting the convenience outlet on
page 20.
Field power wires are connected to the unit at line- - side
pressure lugs on compressor contactor C and indoor fan
terminal block (IFTB) (see wiring diagram label for
control box component
factory- - installed option non- - fused disconnect switch or
HACR. Max wire size is #2 ga AWG (copper only) per
pole on contactors. #2 ga AWG per pole on optional
disconnect or HACR and 4/0 AWG per pole on terminal
or fuse block on units with single point box. See Fig. 16
and unit label diagram for field power wiring connections.
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in
intermittent operation or performance satisfaction.
Do not connect aluminum wire between disconnect
switch and 50LC unit. Use only copper wire.
(See Fig. 15.)
ELECTRIC
DISCONNECT
SWITCH
WIRE ONLY
Fig. 15 - - Disconnect Switch and Unit
arrangement) or
COPPER
ALUMINUM
WIRE
Units Without Single Point Box, Disconnect or HACR Option
at
Units With Disconnect or HACR Option
L1
L2
L3
Ground
(GR)
Units With Electric Heat Option with Single Point Box
and Without Disconnect or HACR Option
L1
L2
L3
Ground (GR)
A93033
L1
L2
L3
Ground (GR)
Fig. 16 - - Power Wiring Connections
13
C
Equip
11 12 13
GR Lug
Disconnect
per
NEC
L1 L2 L3 Ground
(GR)
208/230-3-60
460-3-60
575-3-60
2 1
Optional
Disconnect
4 3
Switch
6 5
Disconnect factory test leads; discard.
Single Point Box
Terminal Block
Equip GR
Lug
— OR —
Single Point Box
Fuse/Terminal Block
Fuse
Fuse
Fuse
Equip GR
Lug
Factory
Wiring
Equip GR Lug
Factory
Wiring
Factory
Wiring
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