Step 6 -Trap Condensate Drain; Step 7 -Make Electrical Connections - Carrier 50PG20 Installation Instructions Manual

Horizontal Applications
Horizontal units are shipped with outer panels that allow for side
by side horizontal duct connections. If specified during ordering,
the unit will be shipped with the vertical duct openings blocked off
from the factory, ready for side supply installation. If the horizontal
option was not specified at time of ordering the unit, a
field-installed accessory kit is required to convert the vertical unit
into a horizontal supply configuration.
Installation of the duct block-off covers should be completed prior
to placing the unit unless sufficient side clearance is available. A
minimum of 66 in. is required between the unit and any
obstruction to install the duct block-off covers. Side supply duct
dimensions and locations are shown on Fig. 6. Connect ductwork
to horizontal duct flange connections on side of unit.
Step 6 —Trap Condensate Drain
See Fig. 10 for drain location. One
outside unit evaporator section for condensate drain connection. A
trap at least 4-in. deep must be used. (See Fig. 11.)
All units must have an external trap for condensate drainage. Install
a trap at least 4 in. 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 of run. Do not use a pipe size smaller
than the unit connection.
Fig. 10 --- Condensate Drain Details
NOTE: Trap should be deep enough to offset maximum unit static difference.
A 4-in. trap is recommended.
Fig. 11 --- Condensate Drain Piping Details
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/ -in. half coupling is provided
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C06282
C06291
Step 7 —Make Electrical Connections
WARNING
!
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning coud result in electrical
shock, fire, or death.
The cabinet MUST have an uninterrupted or unbroken
ground according to NEC ANSI/NFPA 70- -2002 and
Canadian Electrical Code CSA C22.1 or local codes to
minimize personal injury if an electrical fault should
occur. This may consist of electrical wire or conduit
approved for electrical ground when installed in
accordance with existing electrical codes. Do not use
gas piping as an electrical ground.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage to unit.
The correct power phasing is critical to the operation of the
scroll compressors. An incorrect phasing will result in an
alarm being generated and compressor operation lockout.
Should this occur, power phase correction must be made to
the incoming power.
Field Power Supply
(For more details, refer to the Controls, Start- -Up, Operation and
Troubleshooting manual).
Unit is factory wired for voltage shown on unit nameplate. Be sure
to check for correct voltage.
All 208/230-v units are factory wired for 230-v power supply. If
the 208/230-v unit is to be connected to a 208-v power supply,
transformers (TRAN1 and TRAN2) must be rewired by moving
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the black wire with the / -in. female quick connect from the 230-v
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connection and moving to the 200-volt
primary side of the transformer.
When installing units, provide disconnect per NEC (National
Electrical Code) of adequate size (MOCP [Maximum Overcurrent
Protection] of unit is on the informative plate). (See Tables 4 and
5.) All field wiring must comply with NEC and local codes. Size
wire based on MCA (Minimum Circuit Amps) on the unit
informative plate. See Fig. 12 for power wiring connections to the
unit power terminal block and equipment grounds.
Route power and ground lines through control box end panel or
unit basepan (see Fig. 6) to connections as shown on unit wiring
diagram and Fig. 12.
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1
/ -in. male terminal on the
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