1 - Remove the cap from the service valve.
2 - Connect the line to a vacuum pump and down to 5
pa.
3 - When pump down is finished, wait 15 minutes to
detect potential circuit leakage. Open service valves
on the outdoor unit.
If piping length exceeds 5 meters, add 10 g of refrigerant
R22/R407C per extra meter.
NOTE
The expansion device is located in the outdoor unit.
Condensate drain connection
CONDENSATE DRAINAGE
L
D
L
H
Table 2 - Maximum piping lengths
Unit size
D (m)
L (m)
H (m)
25
20
25
22
35
20
25
22
45
24
30
26
55
24
30
26
65
24
30
26
NOTE
Where the difference in elevation is greater than 5 meters,
install an oil trap every 5 meters.
Condensate drainage is provided on the unit. The
connection is located at the rear. Use a 19 mm
diameter plastic tube.
To ensure correct condensate drainage, the drain
line must be installed with a gradient of at least
2% (2 cm per meter) and without any upward
slopes.
An elbow trap at least 50 mm in height must also
be provided.
If possible, install a U bend fitted with an
inspection cap.
REFRIGERANT PIPING CONNECTIONS
Where the condensate lines from several units are joined
together, each individual outlet must be fitted with an
elbow trap.
After routing and connecting condensate lines, pour water
into the collecting pan and check that it drains correctly.
An auxiliary condensate pump could be installed in cases
where drain lines cannot be routed the correct gradient.
50 mm.
Prefabricated refrigerant piping is available as an accessory. If this is used, piping and insulating materials
employed must be compatible with this type of installation.
The pre-charged outdoor unit does not require charging if piping length is 5 m or less. However, the
interconnecting piping and the indoor unit must be pumped down before releasing R22/R407C refrigerant
into them from the outdoor unit.
Low pressure High pressure
Pressure tap
Liquid valve
Gas valve
Collector
R22/R407C
Indoor unit
Liquid line
Gas line
Outdoor unit
