Carrier 50HC Series, Руководство по установке

Страница: 15 / 52

15
The field power wires are connected to the unit at line-side pres-
sure lugs on compressor contactor C and indoor fan contactor IFC
(see wiring diagram label for control box component arrange-
ment) or at factory-installed option non-fused disconnect switch or
HACR. Maximum wire size is #2ga AWG (copper only) per pole
on contactors, #2ga AWG (copper only) per pole on optional dis-
connect or HACR, and 4/0 AWG (copper only) per pole on termi-
nal or fuse blocks on units with single point box. See Fig. 22 and
unit label diagram for field power wiring connections.
NOTE: Unit may be equipped with short test leads (pigtails) on
the field line connection points on contactor C or optional discon-
nect switch. These leads are for factory-run test purposes only; re-
move and discard before connecting field power wires to unit con-
nection points. Make field power connections directly to line con-
nection pressure lugs only.
UNITS WITH FACTORY-INSTALLED NON-FUSED DIS-
CONNECT OR HACR
The factory-installed optional non-fused disconnect (NFD) or
HACR switch is located in a weatherproof enclosure located un-
der the main control box. The manual switch handle and shaft are
shipped in the disconnect or HACR enclosure. Assemble the shaft
and handle to the switch at this point. Discard the factory test leads
(see Fig. 22).
See Fig. 21.
Connect field power supply conductors to LINE side terminals
when the switch enclosure cover is removed to attach the handle.
Fig. 21 — Disconnect Switch and Unit
Fig. 22 — Power Wiring Connections
WARNING
FIRE HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Do not connect aluminum wire between disconnect switch and
unit. Use only copper wire.
COPPER
WIRE ONLY
ELECTRIC
DI S CONNECT
S WITCH
ALUMINUM
WIRE
C
11 23
Disconnect
per
NEC
208/230-1-60
or
Disconnect
per
NEC
11 13 13 23
L1 L2 L3
TB
C IFC
Direct Drive IFM
208/230-3-60
460-3-60
575-3-60
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
1-ph Belt Drive IFM
3
Equip
GR Lug
Ground
(GR)
Ground
(GR)
Equip
GR Lug
Equip GR Lug
Ground
(GR)
3 Phase Only
3 Phase Only
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