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Step 11 — Make Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
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; ANSI/NFPA 70, latest edition
(in Canada, Canadian Electrical Code CSA [Canadian
Standards 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.
Refer to Fig. 22 for power transformer connections and the
discussion on connecting the convenience outlet on page 13.
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. 16 and 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.
Units Without Non-Fused Disconnect Option
(3 Phase
Indoor Motor)
C
11
13
Disconnect
per
NEC
L1
L2
208/230-1-60
208/230-3-60
460-3-60
575-3-60
Units With Non-Fused Disconnect Option
L1
2
Optional
Disconnect
L2
4
Switch
L3
6
Disconnect factory test leads; discard.
Fig. 16 - - 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 50KCQ unit. Use only copper wire.
(See Fig. 17.)
ELECTRIC
DISCONNECT
SWITCH
Fig. 17 - - 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. 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. 16).
Connect field power supply conductors to LINE side
terminals when the switch enclosure cover is removed to
attach the handle.
13
IFC
(1 Phase Indoor Motor
13
TB
and 1 Phase Unit)
L3
1
Factory
3
Wiring
5
C14264
COPPER
WIRE ONLY
ALUMINUM
WIRE
A93033
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