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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
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 2 and 3 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 3.
3.
Expansion Valve Coil:
a. The vertical separation can be greater than the Table value, but no more
than 120 feet.
b. No changes are required for expansion valve coils.
4.
Always use the smallest liquid line size permitted to minimize the system
charge.
5.
Table 3 may be used for sizing horizontal runs.
7.4 OUTDOOR UNIT BELOW INDOOR COIL
Keep the vertical separation to a minimum. Use the following guidelines when
installing the unit:
1.
DO NOT exceed the vertical separations as indicated on Table 3.
2.
Always use the smallest liquid line size permitted to minimize system charge.
3.
No changes are required for either flow check piston coils or expansions coils.
4.
Table 4 may be used for sizing horizontal runs.
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.
