Specifications

10
6.0 REPLACEMENT UNITS
To prevent failure of a new condensing unit, the existing evaporator tubing system
must be correctly sized and cleaned or replaced. Care must be exercised that the
expansion device is not plugged. For new and replacement units, liquid line filter
drier sould be installed and refrigerant tubing should be properly sized. Test the oil
for acid. If positive, a suction line filter drier is mandatory.
IMPORTANT: WHEN REPLACING AN R-22 UNIT WITH AN R-410A UNIT,
EITHER REPLACE THE LINE SET OR ENSURE THAT THE EXISTING LINE SET
IS THOROUGHLY CLEANED OF ANY OLD OIL OR DEBRIS.
7.0 EVAPORATOR COIL
REFER TO EVAPORATOR COIL MANUFACTURER’S INSTALLATION INSTRUC-
TIONS.
IMPORTANT: The manufacturer is not responsible for the performance and opera-
tion of a mismatched system, or for a match listed with another manufacturer’s coil.
NOTE: All units must be installed with a TEV Evaporator.
The thermostat expansion valve is specifically designed to operate with R-410A.
DO NOT use an R-22 TEV or evaporator. The existing evaporator must be
replaced with the factory specified TEV evaporator specifically designed for
R-410A.
LOCATION
Do not install the indoor evaporator coil in the return duct system of a gas or oil fur-
nace. Provide a service inlet to the coil for inspection and cleaning. Keep the coil
pitched toward the drain connection.
8.0 REPLACEMENT UNITS
To prevent failure of a new condensing unit, the existing evaporator tubing system
must be correctly sized and cleaned or replaced. Care must be exercised that the
expansion device is not plugged. Test the oil for acid. If positive, a suction line filter
drier is mandatory. For new and replacement units, a liquid line filter drier should be
installed and refrigerant tubing should be properly sized.
9.0 INTERCONNECTING TUBING
9.1 VAPOR AND LIQUID LINES
Keep all lines sealed until connection is made.
Refer to Line Size Information in Tables 2 through 4 for correct size and multipliers to
be used to determine capacity for various vapor line diameters and lengths of run.
The losses due to the lines being exposed to outdoor conditions are not included.
The factory refrigeration charge in the outdoor unit is sufficient for 15 feet of inter-
connecting lines. The factory refrigeration charge in the outdoor unit is sufficient for
!
CAUTION
When coil is installed over a finished ceiling and/or living area, it is
recommended that a secondary sheet metal condensate pan be
constructed and installed under entire unit. Failure to do so can result
in property damage.
!
CAUTION
Only use evaporators approved for use on R-410A systems. Use of existing R-22
evaporators can introduce mineral oil into the R-410A refrigerant forming two differ-
ent liquids and decreasing oil return to the compressor. This can result in com-
pressor vfailure.