Carrier 50HC Series, Installation Instructions Manual, Page: 14 / 52

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Fig. 17 — Economizer Filter Installation
Step 9 — Units with Hinged Panels Only
Relocate latch shipped inside the compressor compartment behind
the hinged compressor door to location shown in Fig. 18 after unit
installation.
If the unit does not have hinged panels, skip this step and continue
at Step 10 below.
Fig. 18 — Compressor Door Latch Location
Step 10 — Install External Condensate Trap and
Line
The unit has one 3 /
4
-in. condensate drain connection on the end of
the condensate pan and an alternate connection on the bottom. See
Fig. 19. Unit airflow configuration does not determine which
drain connection to use. Either drain connection can be used with
vertical or horizontal applications.
When using the standard side drain connection, ensure that the red
plug in the alternate bottom connection is tight. Do this before set-
ting the unit in place. The red drain pan plug can be tightened with
a 1 /
2
-in. square socket drive extension.
To use the alternate bottom drain connection, remove the red drain
plug from the bottom connection (use a
1
/
2
-in. square socket drive
extension) and install it in the side drain connection.
The piping for the condensate drain and external trap can be com-
pleted after the unit is in place. See Fig. 20.
All units must have an external trap for condensate drainage. In-
stall 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 con-
nection (
3
/
4
-in.).
Fig. 19 — Condensate Drain Pan (Side View)
Fig. 20 — Condensate Drain Pan Piping Details
Step 11 — Make Electrical Connections
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 accord-
ing 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. See Convenience Outlets on page 17 for power transformer
connections.
DIVIDER
BAROMETRIC
RELIEF
CLEANABLE
ALUMINUM
FILTER
FILTER
HOOD
FILTER
CLIP
OUTSIDE
AIR
COMPRESSOR
DOOR
OUTDOOR COIL
LATCH
WARNING
ELECTRIC 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 elec-
trical wire connected to unit ground lug in control compart-
ment, 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.
DRAIN
(FACTORY-INSTALLED) PLUG
CONDENSATE PAN (SIDE VIEW)
STANDARD
SIDE DRAIN
ALTERNATE
BOTTOM DRAIN
NOTE: Tr a p s ho u ld b e deep eno u gh to off s et m a xim u m u nit s t a tic
difference. A 4-in. (102 mm) tr a p i s recommended.
MINIMUM PITCH
1˝ (25 mm) PER
1
0´ (
3 m) OF LINE
BA S E RAIL
OPEN
VENT
TO ROOF
DRAIN
DRAIN PLUG
ROOF
CURB
S EE NOTE
3 ˝ (76 mm)
MIN