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Additional refrigerant
System refrigerant volume is based on linear feet of liquid line pipe and indoor equipment model/quantity.
Refer to the outdoor unit installation manuals for information regarding refrigerant volume for system components.
See table below for additional refrigerant volumes for each air handler.
Drain pipe installation
The air handler "A" coil drain pan has two ¾" NPT (Φ19.05mm) female primary and two secondary connections (left or right hand).
The horizontal pan has two ¾" NPT (Φ19.05mm) female, one primary and one secondary. Piping from each fitting used is to have
2 inch (50.8mm) minimum trap and each run in such a manner as to provide enough slope for adequate drainage to a visible area.
Do not pipe these two fittings together into a common drain. Prime drain with water before operating the unit by pouring water
into the condensate pan. Cap unused connections.
(50.8mm minimum)
2" minimum
(50.8mm minimum)
2" minimum
(50.8mm minimum)
Typical Condensate Traps
Make sure to keep the drain hose from getting tangled or loosened (on the connection part).
CAUTION
Insulate all condensate pipes connected to the indoor unit to prevent condensation formation. Condensate
formation on condensate pipes can lead to property damage and unsafe environment conditions.
When passing the drain hose through the hole drilled in the wall, make sure to avoid following cases.
Since the draining is of natural drain type, install the drain hose in downward direction.
CAUTION
If you do not tie the drain hose with a cable tie, leakage may occur
Drain pipe may get clogged if there is any foreign substances within the drain pan, so you must remove any
foreign substances after completing the installation.
2" minimum
Anti-syphon air vent
15
Refrigerant pipe
conections
Horizontal left
(right to left) drain
connections
Horizontal right
(left to right)
drain pan
opening
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