Mitsubishi Electric CITY MULTI PURY-HP72TNU-A Data Book page 104

12. PIPING DESIGN
Procedures for installing the branched pipes
Refer to the instructions that came with the branched pipe kit (separately sold) for details.
[1] Branches on the indoor-unit side
Restriction on installing the 2-Branch Joint Pipe CMY-Y202/302S-G2 on the gas piping
To outdoor/heat source unit
Horizontal installation
CMY-Y202S-G2 and CMY-Y302S-G2 in the gas line must be installed horizontally (see figure above) or with the
branched pipes facing up.
If the size of the refrigerant pipe that is selected by following the instructions under "Piping Design" section does not
match the size of the joint, use a reducer to connect them. A reducer is included in the kit.
Restriction on installing the 2-Branch Joint Pipe CMY-R201/202/203/204/205S-G on the high-pressure piping,
low-pressure piping, and liquid piping.
To main BC controller
-Regarding the 2-Branch Joint Pipe on the high-pressure/low-pressure/liquid piping, A and B must be installed
horizontally, and C must be installed upward higher than the horizontal plane of A and B.
[2] Branches on the outdoor/heat source-unit side
Inclination of the twinning pipes
The inclination of the twinning pipes must be ±15° or less against the horizontal plane.
Excessive inclination of the branched pipes may damage the unit.
Minimum length of the straight section of the pipe before the branched pipes
Always use the pipes supplied in the branched pipe kit, and make sure the straight section of the pipe immediately
before it connects to the branched pipe is at least 500 mm (19-11/16 in.). Failure to do so may damage the unit.
MEES19K180
±15° or less
To sub BC controller
C
A
Note. Refer to the figure below for the installation position of the twinning pipe.
Twinning pipe
Slope of the twinning pipes are at an angle within ±15° to the horizontal plane.
To branch pipe or indoor unit
Vertical installation
(The branched pipes must face up.)
Indoor-unit side (branched pipe)
Outdoor/heat source-unit side (main pipe)
B
To sub BC controller
Hyper Heating Inverter R2-Series
±15° or less
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