<Table 1>
Lower stream unit model
Lower stream unit model
More than 73 and less
Less than 72 in total
than 144 in total
CMY-Y102SS-G2
CMY-Y102LS-G2
Outdoor Twinning Kit model
Total outdoor model
Total outdoor model
P144YSKMU,
P264 ~ P360T/YSKMU
P168 ~ P240T/YSKMU
CMY-Y100CBK3
CMY-Y300CBK2
Warning:
When installing and moving the unit, do not charge the system with any
other refrigerant other than the refrigerant specified on the unit.
- Mixing of a different refrigerant, air, etc. may cause the refrigerant cycle to
malfunction and may result in severe damage.
Caution:
•
Use a vacuum pump with a reverse flow check valve.
- If the vacuum pump does not have a reverse flow check valve, the vacuum
pump oil may flow back into the refrigerant cycle and cause deterioration of
the refrigerant oil.
•
Do not use the tools shown below used with conventional refrigerant.
(Gauge manifold, charge hose, gas leak detector, check valve,
refrigerant charge base, vacuum gauge, refrigerant recovery
equipment)
- Mixing of conventional refrigerant and refrigerant oil may cause the
refrigerant oil to deteriorate.
.. Refrigerant piping system
Connection Example
[Fig. ..1]
[Outdoor model : P7 ~ P144T/YKMU]
A
B
C
C
C
C
[Outdoor model : P144YSKMU, P1 ~ P40T/YSKMU]
unit 1
unit 2
A
A
B
E
C
C
[Outdoor model : P4 ~ P0T/YSKMU]
unit 1
unit 2
unit 3
A
A
A
B
E
E
C
C
10
Indoor twinning pipe set model
Line branch
Lower stream unit model
More than 145 and less
than 240 in total
CMY-Y202S-G2
C
C
C
C
C
C
C
Lower stream unit model
4 branches
More than 241 in total
CMY-Y302S-G2
CMY-Y104C-G
- Mixing of water will cause the refrigerant oil to deteriorate.
- R410A refrigerant does not contain any chlorine. Therefore, gas leak
detectors for conventional refrigerants will not react to it.
•
Manage the tools used for R410A more carefully than normal.
- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant oil will
deteriorate.
•
Never use existing refrigerant piping.
- The large amount of chlorine in conventional refrigerant and refrigerant oil
in the existing piping will cause the new refrigerant to deteriorate.
•
Store the piping to be used during installation indoors and keep both
ends of the piping sealed until just before brazing.
- If dust, dirt, or water gets into the refrigerant cycle, the oil will deteriorate
and the compressor may fail.
•
Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.
•
Do not use special detergents for washing piping.
A
F
B
D
C
C
C
C
C
unit 1
unit 2
A
A
F
B
E
C
C
C
C
C
unit 1
unit 2
unit 3
A
A
A
F
B
E
E
C
C
C
Header branch
8 branches
10 branches
CMY-Y108C-G
CMY-Y1010C-G
D
A Outdoor unit
B 1st branch
C Indoor unit
D Cap
E Outdoor Twinning Kit
F Header
D
* The total length of A
(A
), A
and
1
2
3
A
is less than 10 m [32 ft].
4
C
C