Step 12 - Install External Condensate Trap And Line; Step 13 - Make Electrical Connections; Field Power Supply - Carrier 48HC Installation Instructions Manual

Step 12 — Install External Condensate Trap
and Line
3
The unit has one / -in. condensate drain connection on
4
the end of the condensate pan and an alternate connection
on the bottom. See Fig. 22. 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
1
be tightened with a / - - in. square socket drive extension.
2
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. 23.
CONDENSATE PAN (SIDE VIEW)
STANDARD
DRAIN
SIDE DRAIN
(FACTORY-INSTALLED)
Fig. 22 - - 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. 23 - - 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
3
( / -in.).
4
1
/ - - in.
2
ALTERNATE
PLUG
BOTTOM DRAIN
C08021
2˝ (51) MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
.
C08022
Step 13 — Make Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not use gas piping as an electrical ground. 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 Canada, Canadian
Electrical Code CSA
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 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. 32 for power transformer connections and the
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 or HACR. Max wire size is
#2ga AWG (copper only) per pole on contactors and #2ga
AWG (copper only) per pole on optional disconnect or
HACR. See Fig. 24 and unit label diagram for field power
wiring connections.
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.
15
[Canadian Standards