13
unit disconnect. On a unit without a unit--mounted
disconnec t, connect the source leads to compressor
contactor C and indoor fan terminal block (IFTB) pressure
lugs with unit field power l eads.
Refer to Fig. 28 for power t ransformer 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 arrangeme nt) or at
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
disconnec t or HACR and 4/0 AWG pe r pole on terminal
or fuse block on uni ts with single point box. See Fig. 16
and unit label diagra m for field power wiring connections.
!
WARNING
FIRE HAZARD
Failure to follow this warning coul d 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.)
COPPER
WIRE ONLY
ELECTRIC
DISCONNECT
SWITCH
ALUMINUM
WIRE
A93033
Fig. 15 -- Disconnect Switch and Unit
Units Without Single Point Box, Disconnect or HACR Option
Units With Disconnect or HACR Option
L1
L2
L3
2
4
6
1
5
Optional
Disconnect
Switch
Disconnect factory test leads; discard.
Factory
Wiring
3
Equip GR Lug
Ground
(GR)
Units With Electric Heat Option with Single Point Box
and Without Disconnect or HACR Option
L1
L2
L3
Single Point Box
Factory
Wiring
Equip GR
Lug
Ground (GR)
Terminal Block
— OR —
L1
L2
L3
Single Point Box
Factory
Wiring
Equip GR
Lug
Ground (GR)
Fuse/Terminal Block
Fuse
Fuse
Fuse
Disconnect
per
NEC
11 12 13
L1 L2 L3
C
208/230-3-60
460-3-60
575-3-60
Ground
(GR)
Equip
GR Lug
13262
Fig. 16 -- Power Wiring Connections
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