Table of Contents
Advertisement
Units Without Disconnect Option
C
13
11
Disconnect
L1
L2
208/230-3-60
460-3-60
575-3-60
Units With Disconnect Option
L3
L3
Optional
Disconnect
L2
L2
Switch
L1
L1
Ground
(GR)
Disconnect factory test leads; discard.
Fig. 24 − Power Wiring Connections
Field power wires will be connected line−side pressure
lugs on the power terminal block or at factory−installed
option non−fused disconnect.
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. Max wire size is #4 AWG
(copper only) per pole on contactors and #2ga AWG
(copper only) per pole on optional non−fused disconnect.
See Fig. 24 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.
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 air conditioning unit. Use only copper wire.
(See Fig. 25.)
IFC
Equip
13
GR Lug
per
NEC
L3
Ground
(GR)
T3
BLU
YEL
T2
Factory
Wiring
T1
BLK
Equip GR Lug
C12741
ELECTRIC
DISCONNECT
SWITCH
WIRE ONLY
Fig. 25 − Disconnect Switch and Unit
Units with Factory−Installed Non−Fused Disconnect —
The factory−installed option non−fused disconnect (NFD)
switch is located in a weatherproof enclosure located
under the main control box (see Fig. 26). 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. 24).
Connect field power supply conductors to LINE side
terminals when the switch enclosure cover is removed to
attach the handle.
Fig. 26 − Location of Non−Fused Disconnect Enclosure
To field install the NFD shaft and handle:
1. Remove the unit front panel (see Fig. 2 or Fig. 3).
2. Remove (3) hex screws on the NFD enclosure − (2) on
the face of the cover and (1) on the left side cover. See
Fig. 27.
3. Remove the front cover of the NFD enclosure.
4. Make sure the NFD shipped from the factory is at
OFF position (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.
6. Measure from the tip of the shaft to the top surface of
the black pointer; the measurement should be 3.75 −
3.88 in. (95 − 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.
18
COPPER
ALUMINUM
WIRE
A93033
C12278
Advertisement
Table of Contents
