Mitsubishi Electric CITY MULTI PUHY-P-TLMU-A Manuel D'installation page 10

<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
P144 ~ P240T/YSLMU P264 ~ P360T/YSLMU
CMY-Y100CBK3 CMY-Y300CBK2
Warning:
When installing and moving the unit, do not charge the system with any
- Mixing of a different refrigerant, air, etc. may cause the refrigerant cycle to
malfunction and may result in severe damage.
Caution:
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.
9.2. Refrigerant piping system
Connection Example
[Fig. 9.2.1]
[Outdoor model : P72 ~ P168T/YLMU]
A
B
C
C C C
[Outdoor model : P144 ~ P240T/YSLMU]
unit 1 unit 2
A A
B
E
C
C
[Outdoor model : P264 ~ P360T/YSLMU]
unit 1 unit 2 unit 3
A A A
B
E
E
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
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
unit 1 unit 2 unit 3
A A A
B
E
E
C C
C
Header branch
8 branches 10 branches
CMY-Y108C-G CMY-Y1010C-G
D
C
A Outdoor unit
B 1st branch
C Indoor unit
F
D Cap
E Outdoor Twinning Kit
F Header
D
* The total length of A (A ), A
1 2
A is less than 10 m [32 ft].
4
C C
and
3