Step 12 - Make Electrical Connections; Field Power Supply - Carrier WeatherExpert 48LC Installation Instructions Manual

Step 12 — Make Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not use gas piping as an electrical ground. Unit
cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of
personal injury if an electrical fault should occur. This
ground may consist of electrical wire connected to unit
ground lug in control compartment, or conduit
approved for electrical ground when installed in
accordance with NEC (National Electrical Code);
ANSI/NFPA 70, latest edition (in Canada, Canadian
Electrical Code CSA
Association] C22.1), and local electrical codes.
NOTE: Field- - supplied wiring shall conform with the
limitations of minimum 63_F (33_C) rise.
Field Power Supply —
If equipped with optional Powered Convenience Outlet: The
power source leads to the convenience outlet's transformer
primary are not factory connected. Installer must connect
these leads according to required operation of the
convenience outlet. If an always- - energized convenience
outlet operation is desired, connect the source leads to the
line side of the unit- - mounted disconnect. (Check with local
codes to ensure this method is acceptable in your area.) If a
de- - energize via unit disconnect switch operation of the
convenience outlet is desired, connect the source leads to the
load side of the unit disconnect. On a unit without a
unit- - mounted disconnect, connect the source leads to
compressor contactor C and indoor fan contactor IFC
pressure lugs with unit field power leads (see Fig. 23).
Refer to Fig. 38 for power transformer connections and the
discussion on connecting the convenience outlet on page 26.
Field power wires will be connected line- - side pressure
lugs on the power terminal block or at factory- - installed
option non- - fused disconnect or HACR.
Field power wires are connected to the unit at line- - side
pressure lugs on compressor contactor C and indoor fan
contactor IFC (see wiring diagram label for control box
component arrangement), at factory- - installed option
non- - fused disconnect switch or HACR. Max wire size is
#4 AWG (copper only) per pole on contactors and #2ga
AWG (copper only) per pole on optional non- - fused
disconnect or HACR. See Fig. 23 and the unit label
diagram for field power wiring connections.
NOTE: TEST LEADS - - Unit may be equipped with
short leads (pigtails) on the field line connection points on
contactor C or optional disconnect switch. These leads are
for factory run- - test purposes only; remove and discard
before connecting field power wires to unit connection
points. Make field power connections directly to line
connection pressure lugs only.
[Canadian Standards
Units Without Disconnect or HACR Option
C
11 12
L1 L2
208/230-3-60
460-3-60
575-3-60
Units With Disconnect or HACR Option
L1
2
Disconnect
L2 4
L3
6
Ground
(GR)
Disconnect factory test leads; discard.
Fig. 23 - - 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 48LC unit. Use only copper wire.
(See Fig. 24.)
ELECTRIC
DISCONNECT
SWITCH
Fig. 24 - - Disconnect Switch and Unit
17
Equip
13
GR Lug
Disconnect
per
NEC
L3 Ground
(GR)
1
Optional
3
Switch
Factory
Wiring
5
Equip GR Lug
COPPER
WIRE ONLY
ALUMINUM
WIRE
C13261
A93033