– 79 –
(6)
Piping installation
(a) In case of type 1
Notes:
1. For charging mass of refrigerant refer to note 2 of next page.
2. Connection of pipings must be gauged.
3. It must be free from any foreign matters to prevent clogging of valves, malfunction of solenoid valves and damage
of compressor. It must be free from moisture that can cause clogging due to ice formation and must not be
scratched to prevent leakage of refrigerant.
4. Apply refrigerant oil between fittings and use
double spanner when tightening.
For torque requirements refer to table right
5. Item 7, 8 refrigerant hose installation.
(1) Bending radius of the hose must be equal or
more than the minimum R to prevent
deformation and restriction of flow.
(2) Be careful not to twist the hose when fastening
the fittings.
6. For clamp prepared hole, refer to the table below.
Clamp installation drawing
(Hole position must be gauged)
7. Compressor selection
In case of CR2211L-A
1
········ Left downward position
(
23
··· Upward position
)
4
········ Right downward position
1 2 3
are ordinary type,
4
is not applicable to use.
Another type of compressor is prepared wherein ports are on the
reversed position. Inquire us for details.
In case of CR2318LWR
1
and
2
compressor must be installed at standing position.
8. Compressor outlet and inlet pipe should be fixed because water absorption power of oil is high.
9. Pipe must be fixed lastly the same as compressor pipe, because dryer is already installed.
Connect quickly when its raining.
10.After vacuum process, it must be charged with small volume of liquid refrigerant (30 ~ 50g) from the suction
operation valve.
11.Avoid excessive leakage of refrigerant during charging.
Pipe ø
Torque N·m (kgf·m)
ø9.52
1.96 ~ 29.4 (2 ~3)
ø12.7
29.4 ~ 39.2 (3 ~4)
ø15.88
39.2 ~ 49.0 (4 ~5)
ø19.05
49.0 ~ 58.8 (5 ~ 6)
Hose type
Hose outside ø
Min. bent radius
High press
ø18.1
90mm
ø25.2
120mm
Low press
ø21.5
130mm
Material
Installation dwg.
Hole size
Aluminum or FRP
ø3.0
