INFORMATION FOR THE INSTALLER
MODEL 18000 BTU/H 24000 BTU/H 36000 BTU/H 48000 BTU/H
Liquid pipe diameter
3/8”3/8”3/8”1/2”
Gas pipe diameter
5/8”5/8”5/8”3/4”
Maximum lenght of pipe with standard charge 7 m 7 m 7 m 7 m
Maximum distance between indoor and outdoor unit 30 m 30 m 30 m 30 m
Additional gas charge 30 g/m 36 g/m 42 g/m 60 g/m
Maximum difference in level between indoor and outdoor unit 15 m 15 m 15 m 15 m
Type of refrigerant R 22 R 22 R 22 R 22
TIGHTENING TORQUES
FOR THE FLANGE CONNECTIONS
Pipe Tightening torque Tightening torque standard
[Kg x cm]
(using a 20 cm wrench)
9,52 mm
(3/8”)
310-350
arm strength
12,70 mm (1/2”) 350 - 450
arm strength
15.88 mm (5/8”) 750 - 800
arm strength
19,05 mm (3/4”) 800 - 1000
arm strength
To prevent leakages pay special attention to the following points:
·Tighten the connectors using two wrenches. Take care not to damage the pipes.
·If the tightening torque is not sufficient, there will probably be leakages. If the torque is too great, there could be leaks
because it is easy to damage the flange.
·The safest way to tighten the connection is to use a standard wrench and a torque wrench: in this case, use the following table.
5.1 CONNECTION TO THE INDOOR UNIT
1.Bend the connection pipes following the correct path.
2.Remove the cap from the indoor unit piping (check that
here is no debris inside).
3.Insert the connector and apply the flange at the end of the
connection pipe.
4.Connect the pipes using two wrenches.
5.2 CONNECTION TO THE OUTDOOR UNIT
Screw the connectors to the piping ports of the outdoor unit
with the same tightening method as that used for the indoor
unit.
Tightening torque
(Kg x cm)
Service port 70 - 90
Protection caps 250 - 300
torque wrench
connectors
Connection pipes
gas tap
liquid tap
indoor unit.
protection
caps
service port
tap
tap
gas valve liquid valve
TIGHTENING TORQUE FOR
PROTECTION CAPS
➨
CAUTION!
CHECK FOR LEAKS
OF REFRIGERANT
After connecting the
piping, check for leaks
using a leak detector. Service
port
We recommend using the vacuum pump to carry out the
evacuation of air and humidity from the cooling pipes
PIPING CONNECTION
5
CAUTION: ONLY use copper pipes for ACR type air conditioners.
YES NO
CONNECTING THE PIPES
·Do not remove the cap from the pipes until just before connecting
them. This is to prevent humidity or dirt from entering the pipes.
·If a pipe is bent too many times, it will become stiff: do not bend
the same part of the pipe more than 3 times. When unwinding the
pipe, be careful not to pull it. Unroll it as shown in the figure.
