Carrier 50HCQ12, Руководство по установке

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Step 9 — 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 sock -
et 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.
Fig. 19 — Condensate Drain Pan (Side View)
Fig. 20 — Condensate Drain Pan Piping Details
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.).
Step 10 — Make Electrical Connections
NOTE: Check all factory and field electrical connections for tight -
ness. Field-supplied wiring shall conform with the limitations of
minimum 63°F (33°C) rise.
FIELD POWER SUPPLY
For those units without through-the-curb power, conduit must be
used to route the main power from the condenser end of the unit to
either the factory option disconnect, the bottom of the control box
or the single point box accessory. One inch conduit is provided be -
hind the access panel located under the control box. For those
units that require conduit larger than 1 inch, it must be field sup -
plied. Figures 21-23 show the various wire routings.
If the field disconnect is larger than 100A, it must be attached to
the unit using accessory CRDISBKT001A00 (see Fig. 24). Follow
the instructions provided with this accessory. For smaller field dis -
connects, be sure to use
1
/
2
-in. screws to mount the disconnect di -
rectly to the end panel, following the instructions on the Field Dis -
connect Warning label (see Fig. 25). In either case, set the discon -
nect vertical location on the unit so that a 90 degree fitting can be
used to connect the conduit to the disconnect.
Fig. 21 — Conduit into Factory Option Disconnect
DRAIN
(FACTORY-INSTALLED) PLUG
CONDENSATE PAN (SIDE VIEW)
STANDARD
SIDE DRAIN
ALTERNATE
BOTTOM DRAIN
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. (102 mm) trap is recommended.
MINIMUM PITCH
1˝ (25 mm) PER
1
0´ (
3 m) OF LINE
BASE RAIL
OPEN
VENT
TO ROOF
DRAIN
DRAIN PLUG
ROOF
CURB
SEE NOTE
3˝ (76 mm)
MIN
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.