INVENTOR R2FO-50 User Manual page 34

Installation of Indoor Unit
Pipes for refrigerant and drainage pipe
should be insulated to avoid frosting
and dripping.
1. Both of the indoor and outdoor units
adopt flare-end connection. Refrigerant
pipe as shown below is used to connect
indoor and outdoor units.
Note : Don't bend the bendable pipe back and
forth more than 3 times. Insulate all
exposed parts of the flare-end connection
joint and refrigerant pipe. (As shown in Fig.16)
2.Check valve of the outdoor unit should be closed
(in factory). Every time of connection,screw cap
at check valve should be unscrewed and then
connect it with flare-end pipe immediately (within
5 min).Otherwise, dust, moisture and other impurities
may go into the pipe and cause malfunction.
●
Notes for bendable pipe:
1.The part with bendable pipe should be used in
indoor side.
2. The bending angle should not be more than 90.
3. It's better for the bend to be in the middle of the pipe
and the radius of the bend is the bigger the better.
4. Don't bend the bendable pipe more than three times.
●
When bending the pipe
1. Cut some part of the insulation pipe at the place of
the bend (and wrap with polythene tape after bending).
2. Make radius of the bend as big as possible so that the
pipe will not get flat or broken.
3. Tighten the pipe bending by the rubber bender.
●
When using copper pipe bought locally
Check valve of the outdoor unit should be closed completely
(in the factory). After connection of indoor and outdoor units
via connection pipe, discharge the air from service vent of
low-pressure check valve of the outdoor unit. After that,screw
down the nuts to service vent.
Install the big handle.
●
After step 1 or 2 above
Check valve of the outdoor unit should be fully opened to
ensure smooth flow of connection pipe between indoor
and outdoor units.
Note: Before fastening nut of the flare-end pipe, please apply
some refrigerant oil to the end of the pipe and the joint.
Notes for piping
(As shown in Fig.15)
32
Indoor unit
Fig.15
Bendable pipe
Outdoor unit
Polythene tape
Insulation cover
Fig. 16
Bend the pipe with thumbs
Min. radius: 100 mm
Fig. 17
Loosen the roll of pipe
Straighten end of pipe