Step 11 - Make Electrical Connections; Field Power Supply - Carrier Legacy 548J07 Installation Instructions Manual

Step 11 — Make Electrical Connections
WARNING
Failure to follow this warning could result in personal inju-
ry or death.
Do not use gas piping as an electrical ground.
Unit cabinet must have an uninterrupted, unbroken electri-
cal 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 com-
partment, 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 [Canadian Standards Association]
C22.1), and local electrical codes.
NOTE: Check all factory and field electrical connections for tight-
ness. 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 out-
let. If an always-energized convenience outlet operation is de-
sired, 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 de-
sired, connect the source leads to the load side of the unit dis-
connect. On a unit without a unit-mounted disconnect, connect
the source leads to compressor contactor C and indoor fan con-
tactor IFC pressure lugs with unit field power leads.
Refer to Fig. 31 for power transformer connections and the dis-
cussion on connecting the convenience outlet on page 21.
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 ar-
rangement) or at factory-installed option non-fused disconnect
switch. Maximum wire size is #2 AWG (copper only). See
Fig. 23 and unit label diagram for field power wiring connec-
tions.
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 con-
nections directly to line connection pressure lugs only.
See Fig. 25 and 26 for typical wiring diagrams.
Units Without Non-Fused Disconnect Option
11
L1
Units With Non-Fused Disconnect Option
L1
2
L2 4
L3
6
Disconnect factory test leads; discard.
Fig. 23 — Power Wiring Connections
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.
ELECTRIC
DISCONNECT
SWITCH
Fig. 24 — Disconnect Switch and Unit
17
IFC
(3 Phase
Indoor Motor)
C
(1 Phase Indoor Motor
13 13 TB
and 1 Phase Unit)
Disconnect
per
NEC
L2 L3
208/230-1-60
208/230-3-60
460-3-60
575-3-60
1
Optional
Disconnect
3
Switch
5
WARNING
COPPER
WIRE ONLY
ALUMINUM
WIRE
Factory
Wiring