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Step 4 E Connect
Piping
CONDENSATE PIPING-
The unit is supplied with a
11/4-in. OD drain connection to connect copper or PVC drain
piping. When installing condensate piping, follow these recom-
mendations:
• A drain trap may be required by local codes and is rec-
ommended for odor control.
The differential inlet-to-outlet
height must be at least
1 in. wg greater than the total static pressure of the unit.
The differential height of the outlet to the bottom of the
trap must be equal to or greater than the total static pres-
sure of the unit. Provide a trap of at least 2 in. near the
end of the drain line to prevent odors. See Fig. 10.
CONDENSATE
PAN STUB-OUT
Fig. 10-
Drain Trap
MIN
• Condensate piping should slope downward in the direc-
tion of condensate flow, with a minimum gradient of
1 in. per 100 inches.
• When multiple units are connected to a common conden-
sate drain, ensure that the drain is large enough to accom-
modate the volume of condensate from all units. It is also
recommended to have an air vent in the condensate pip-
ing to prevent air lock.
• Condensate piping must not be installed where it may be
exposed to freezing temperatures.
REFRIGERANT PIPING
When connecting from an indoor unit to an outdoor unit,
the isolation valve at the outdoor unit should be in the
closed position throughout the refrigerant piping process.
Failure to follow this procedure may result in equipment
damage.
When connecting
from an indoor unit to an outdoor unit,
follow these procedures:
•
Maximum
elevation
differential
(indoor
to outdoor)
and
length of refrigerant
piping
is 33 ft. If this is exceeded
consider
mounting
the outdoor
unit
above
the indoor
unit.
•
Refrigerant
piping
connection
between
indoor
and out-
door
units
should
be performed
once
the
units
are
secured
at their respective
installation
locations.
The refrigeration
piping starts at the indoor unit and ends
at the outdoor
unit.
The number of bends in the refrigeration piping must be
fewer than 15.
• The refrigerant piping should be dry and free of dust and
other impurities.
• The bending angle of the refrigerant pipe should not
exceed 90 degrees and the bending radius should be as
large as possible to prevent any breakage in piping.
• Use proper cutting and flaring tools to avoid leakage.
• Before insulating the suction and liquid refrigeration
pipes, perform pressure and leak tests. For details, see
the outdoor unit installation manual. Insulating both suc-
tion and liquid refrigerant pipes is recommended.
• Vacuuming and charging of the system should be carried
out as described in the outdoor unit installation manual.
Step 5 E Complete
Electrical
Connections
Installation of wiring must conform with local building codes
and with National Electric Code ANSI/NFPA 70, current edi-
tions. Units must be electrically grounded in conformance with
the code. In Canada, wiring must comply with CSA C22.1,
Electrical Code.
Electrical shock can cause personal
injury and death. Dis-
connect power supply before making
wiring connections.
There may be more than one disconnect
switch. Tag all dis-
connect locations to alert others not to restore power until
work is completed.
All units must be wired strictly in accordance with the wir-
ing diagram furnished with the unit. Any wiring different
from the wiring diagram could result in personal injury and
property damage.
Any original factory wiring that requires replacement
must
be replaced
with wiring material having a temperature
rat-
ing of at least 105 C.
Ensure supply voltage to the unit, as indicated on the serial
plate, is not more than 10% over the rated voltage or 10%
under the rated voltage.
Failure
to follow
these recolr_nendations
may result
in
equipment
damage.
This equipment in its standard form is designed for an elec-
trical supply of 208/230-1-60. Any damage to or failure of
units caused by incorrect wiring or voltage is not covered by
warranty.
Electric wiring must be sized to carry the full load amp
draw of the motor, starter, and any other controls that are used
with the unit. See Table 2 for electrical data.
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