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10
6.0 INDOOR COIL
REFER TO INDOOR 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.
6.1 LOCATION
Do not install the indoor coil in the return duct system of a gas or oil furnace.
Provide a service inlet to the coil for inspection and cleaning. Keep the coil pitched
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 may result
in property damage.
toward the drain connection.
7.0 INTERCONNECTING TUBING
7.1 VAPOR AND LIQUID LINES
Keep all lines sealed until connection is made.
Make connections at the indoor coil first.
Refer to Line Size Information in Tables 3 through 5 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
the unit and 15 feet of standard size interconnecting liquid and vapor lines. For dif-
ferent lengths, adjust the charge as indicated below.
1/4" ± .3 oz. per foot
5/16" ± .4 oz. per foot
3/8" ± .6 oz. per foot
1/2" ± 1.2 oz. per foot
7.2 MAXIMUM LENGTH OF LINES
The maximum length of interconnecting line is 150 feet. Always use the shortest
length possible with a minimum number of bends. Additional compressor oil is not
required for any length up to 150 feet.
NOTE: Excessively long refrigerant lines cause loss of equipment capacity.
7.3 OUTDOOR UNIT INSTALLED ABOVE INDOOR COIL
Keep the vertical separation between coils to a minimum. However, the vertical dis-
tance can be as great as 120 feet with the condensing unit ABOVE the indoor coil.
Use the following guidelines when installing the unit:
1.
DO NOT exceed 120 feet maximum vertical separation.
2.
DO NOT change the flow check piston sizes if the vertical separation does not
exceed the values in Table 4.
3.
Flow Check Piston Coil:
a. The vertical separation can be greater than the value in Table 4, but no
more than 120 feet.
b. If the separation height exceeds the Table value, reduce the indoor coil flow
check piston by two sizes plus one size for additional 10 feet beyond the
Table value.
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