Step 9 - Install External Condensate Trap; Step 10 - Make Electrical Connections - Carrier 50HT-A07 Installation Instructions Manual

Step 9 — Install External Condensate Trap
and Line
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The unit has one / -in. condensate drain connection on
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the end of the condensate pan and an alternate connection
on the bottom. See Fig. 17. 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 the
red plug in the alternate bottom connection is tight. Do
this before setting the unit in place. The red drain pan can
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be tightened with a / - - in. square socket drive extension.
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To use the alternate bottom drain connection, remove the
red drain plug from the bottom connection (use a
square socket drive extension) and install it in the side
drain connection.
The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 18.
CONDENSATE PAN (SIDE VIEW)
STANDARD
DRAIN
SIDE DRAIN
(FACTORY-INSTALLED)
Fig. 17 - - Condensate Drain Pan (Side View)
MINIMUM PITCH
1" (25mm) PER
BASE RAIL
10' (3m) OF LINE
OPEN
VENT
TO ROOF
DRAIN
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4" (102) trap is recommended
Fig. 18 - - Condensate Drain 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 external trap, pitch the line away
from the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Do
not use a pipe size smaller than the unit connection
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( / -in.).
4
1
/ - - in.
2
ALTERNATE
PLUG
BOTTOM DRAIN
C08021
2˝ (51) MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
.
C08022
Step 10 — 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: Check all factory and field electrical connections
for tightness. Field- - supplied wiring shall conform with
the limitations of 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. 23 for power transformer connections and
the discussion on connecting the convenience outlet on
page 15.
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. 19.)
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.
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