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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) or
at factory-installed option non-fused disconnect switch. Max wire
size is #2 AWG (copper only, see Fig. 18.)
NOTE: TEST LEADS - Unit may be equipped with short leads
(pigtails) on the field line connection points on contactor C or op-
tional disconnect switch. These leads are for factory run-test pur-
poses only; remove and discard before connecting field power
wires to unit connection points. Make field power connections di-
rectly to line connection pressure lugs only.
Units Without Non-Fused Disconnect Option
TB
11
12
Disconnect
per
NEC
208/230-1-60
Units With Non-Fused Disconnect Option
2
L1
4
L2
6
L3
Disconnect factory test leads; discard.
Fig. 17 — 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.
ELECTRIC
DISCONNECT
SWITCH
WIRE ONLY
ALUMINUM
Fig. 18 — Disconnect Switch and Unit
UNITS
WITH
FACTORY-INSTALLED
DISCONNECT
The factory-installed option non-fused disconnect (NFD) switch is
located in a weatherproof enclosure located under the main con-
trol box. The manual switch handle and shaft are shipped in the
disconnect enclosure. Assemble the shaft and handle to the switch
at this point. Discard the factory test leads (see Fig. 17).
Connect field power supply conductors to LINE side terminals
when the switch enclosure cover is removed to attach the handle.
TB
11
12
13
Disconnect
per
NEC
L1
L2
L3
208/230-3-60
460-3-60
1
Optional
Factory
3
Disconnect
Wiring
Switch
5
COPPER
WIRE
NON-FUSED
Field-Install the NFD Shaft and Handle
1.
Remove the control box access panel. The NFD enclosure is
located below the control box (see Fig. 19).
2.
Remove (3) cap head screws that secure the NFD enclosure
front cover — (2) on the face of the cover and (1) on the left
side cover. See Fig. 20.
3.
Remove the front cover of the NFD enclosure.
4.
Make sure the NFD shipped from the factory is at OFF posi-
tion (the arrow on the black handle knob is at OFF).
5.
Insert the shaft with the cross pin on the top of the shaft in the
horizontal position. See Fig. 20.
6.
Measure from the tip of the shaft to the top surface of the
black pointer; the measurement should be 3.75 to 3.88 in. (95
to 99 mm).
7.
Tighten the locking screw to secure the shaft to the NFD.
8.
Turn the handle to the OFF position with red arrow pointing
at OFF.
9.
Install the handle on to the painted cover horizontally with the
red arrow pointing to the left.
10. Secure the handle to the painted cover with (2) screws and
lock washers supplied.
11. Engaging the shaft into the handle socket, re-install (3) hex
screws on the NFD enclosure.
12. Re-install the unit front panel.
Fig. 19 — NFD Enclosure Location
Fig. 20 — NFD Handle and Shaft Assembly
13
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