7
Pipe Length Elevation and Additional Quantity of Gas
• The outdoor unit is charged with the
refrigerant for standard pipe length.
• When the connecting pipe length is longer
than standard length, additional refrigerant
should be added into the unit according
the above table through the service port on
3-way service valve on the outdoor unit.
• Please maintain the shortest distance (3 to 5
meters) and shortest misalignment possible
between the indoor and outdoor units.
• The maximum allowance length and height
is based on reliability.
• Exceeding the maximum may cause poor
performance or malfunction.
• When the outdoor unit is installed above
the indoor unit, oil trap should be installed
every 5-7 meters.
Outdoor unit
Outdoor unit
Maximum length
Maximum length
indoor unit
Maximum height
indoor unit
Oil trap
Rooftop installation
1 If the outdoor unit is installed on a roof
structure, be sure to level the unit.
2 Ensure the roof structure and anchoring
method are adequate for the unit location.
3 If the outdoor unit is installed on roof
structures or external walls, this may result in
excessive noise and vibration, and may also
be classed as non-serviceable installation.
Piping length under 5m
Piping length 5m or more
Product
suction Pipe
diameter
Discharge Pipe
diameter
standard
length (m)
Maximum
length (m)
Maximum
height (m)
Additional
refrigerant
(g/m)
EXM18HV1WE 6.35mm (1/4”)
9.52mm (3/8”)
5
20
10
15
EXM24HV1WE
6.35mm (1/4”)
9.52mm (3/8”)
5
20
10
15
caution
Maximum height