Step 11 - Make Electrical Connections; Field Power Supply; Units Without Factory-Installed Disconnect; Units With Factory-Installed Disconnect - Carrier 50HCQA07 Installation Instructions Manual

CONDENSATE PAN (SIDE VIEW)
STANDARD
SIDE DRAIN
Fig. 18 — Condensate Drain Pan (Side View)
MINIMUM PITCH
1˝ (25 mm) PER
BASE RAIL
10´ (3 m) OF LINE
OPEN
VENT
TO ROOF
DRAIN
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. (102 mm) trap is recommended.
Fig. 19 — Condensate Drain Pan Piping Details
All units must have an external trap for condensate drainage.
Install a trap at least 4 in. (102 mm) deep and protect against
freeze-up. If drain line is installed downstream from the exter-
nal 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 / in.).
4
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 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
compartment, or conduit approved for electrical ground
when installed in accordance with NEC (National Electri-
cal Code); ANSI/NFPA 70, latest edition (in Canada, Ca-
nadian Electrical Code CSA [Canadian Standards Associ-
ation] 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 pri-
mary 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
ALTERNATE
DRAIN PLUG
BOTTOM DRAIN
(FACTORY-INSTALLED)
3˝ (76 mm)
MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
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. See Con-
venience Outlets on page 16 for power transformer connec-
tions.
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 dis-
connect switch. Maximum wire size is #2ga AWG (copper on-
ly). See Fig. 21 and unit label diagram 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 discon-
nect switch. These leads are for factory-run test purposes only; re-
move and discard before connecting field power wires to unit con-
nection points. Make field power connections directly to line con-
nection pressure lugs only.
FIRE HAZARD
Failure to follow this caution could result in fire, intermit-
tent operation, or unsatisfactory performance.
Do not connect aluminum wire between disconnect
switch and air conditioning unit. Use only copper wire.
See Fig. 20.
Connect field power supply conductors to LINE side terminals
when the switch enclosure cover is removed to attach the handle.
ELECTRIC
DISCONNECT
SWITCH
Fig. 20 — Disconnect Switch and Unit
UNITS WITHOUT FACTORY-INSTALLED
DISCONNECT
When installing units, provide a disconnect switch per NEC
(National Electrical Code) of adequate size. Disconnect sizing
data is provided on the unit informative plate. Locate on unit
cabinet or within sight of the unit per national or local codes.
Do not cover unit informative plate if mounting the disconnect
on the unit cabinet.

UNITS WITH FACTORY-INSTALLED DISCONNECT

The factory-installed optional disconnect switch is located in a
weatherproof enclosure located under the main control box.
The manual switch handle is accessible through an opening in
the access panel. Discard the factory test leads (see Fig. 21).
15
WARNING
COPPER
WIRE ONLY
ALUMINUM
WIRE