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RECOMMENDED HEIGHT AND LENGTH
If the refrigerant piping is longer than the
recommended length, or if the height
difference between the indoor and outdoor
unit is greater than recommended, the
capacity will drop and the compressor could
malfunction. Select an installation location
that is within the recommended parameters.
INSTALLATION METHOD
HOLE DRILLING: After deciding the
method your unit will be installed, a hole to
route the connecting tubes and wires to the
outdoor unit is to be drilled on the wall. The
hole must be lower than the point where the
drainpipe attaches to the drain pan of the
unit. It should also be slightly declined
towards the outside.
(MAXIMUM PIPING LENGTH
& HEIGHT RECOMMENDED)
Piping length (feet)
Cooling
capacity
Add
Not
7,500 to
charge
needed
9,000
Btuh
Recommended height difference is 23 ft or less
*Evacuate refrigerant lines
(1)
An installation with a piping length of 23 ft. or less is desirable.
If this is not possible, the maximum piping length can be
extended to 50 ft. by charging the system with additional
refrigerant. However, cooling and heating capacity will be
reduced.
•
Additional charge volume = (piping length - 23 ft.) x 0.2 oz.
Piping length (feet)
Cooling
capacity
Add
Not
18,500 to
charge
needed
36,000
Btuh
Recommended height difference is 23 ft or less
*Evacuate refrigerant lines
(2)
An installation with a piping length of 33 ft. or less is desirable.
If this is not possible, the maximum piping length can be
extended to 55 ft. by charging the system with additional
refrigerant. However, cooling and heating capacity will be
reduced.
•
Additional charge volume = (piping length - 33 ft.) x 0.2 oz.
23
50
Installation
not
Needed
Diameter
recom-
(1)
1/4" and
mended
33
55
Installation
not
Needed
Diameter
recom-
(2)
mended
Notes
Unit
Piping
3/8"
Notes
Unit
Piping
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