Step 11 - Make Electrical Connections; Field Power Supply; Units With Factory-Installed Non-Fused Disconnect Or Hacr - Carrier WeatherMaster 50HC04 Installation Instructions Manual

All units must have an external trap for condensate drain-
age. Install a trap at least 4 in. (102 mm) deep and protect
against freeze-up. If drain line is installed downstream from
the external trap, pitch the line away from the unit at 1 in. per
10 ft (25 mm per 3 m) of run. Do not use a pipe size smaller
than the unit connection ( 3 /
Step 11 — Make Electrical Connections
WARNING
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 (National
Electrical Code); ANSI/NFPA 70, latest edition (in Cana-
da, 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 transform-
er primary are not factory connected. Installer must connect
these leads according to required operation of the conve-
nience outlet. If an always-energized convenience outlet op-
eration is desired, connect the source leads to the line side of
the unit-mounted disconnect. (Check with local codes to en-
sure 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 in-
door fan contactor IFC pressure lugs with unit field power
in.).
4
leads. See Convenience Outlets on page 15 for power trans-
former connections.
The field power wires are connected to the unit at line-side
pressure lugs on compressor contactor C and indoor fan con-
tactor IFC (see wiring diagram label for control box compo-
nent arrangement) or at factory-installed option non-fused
disconnect switch or HACR. Maximum wire size is #2ga
AWG (copper only) per pole on contactors, #2ga AWG (cop-
per only) per pole on optional disconnect or HACR, and 4/0
AWG (copper only) per pole on terminal or fuse blocks on
units with single point box. See Fig. 18 and unit label dia-
gram for field power wiring connections.
NOTE: Unit may be equipped with short test leads (pigtails) on
the field line connection points on contactor C or optional dis-
connect switch. These leads are for factory-run test purposes on-
ly; remove and discard before connecting field power wires to
unit connection points. Make field power connections directly to
line connection pressure lugs only.
UNITS WITH FACTORY-INSTALLED NON-FUSED DIS-
CONNECT OR HACR
The factory-installed optional non--fused disconnect
(NFD) or HACR switch is located in a weatherproof enclo-
sure located under the main control box. The manual switch
handle and shaft are shipped in the disconnect or HACR en-
closure. Assemble the shaft and handle to the switch at this
point. Discard the factory test leads (see Fig. 18).
Failure to follow this caution could result in fire, intermittent
operation, or unsatisfactory performance.
Do not connect aluminum wire between disconnect
switch and air conditioning unit. Use only copper wire.
See Fig. 19.
Connect field power supply conductors to LINE side ter-
minals when the switch enclosure cover is removed to attach
the handle.
12
WARNING