Refrigerant Circuit; Limitation Of Refrigerant Piping Length; Refrigerant Piping; Refrigerant Charge - Mitsubishi Electric PUH-P8MYA Technical & Service Manual

[2] Refrigerant Circuit

Indoor
units

[3] Limitation of Refrigerant Piping Length

(1) Single
H
L ≤ 50 m
H ≤ 40 m
(3) Triple
a
h
H
L + a + b + c ≤ 70 m
L + a, L + b, L + c ≤ 50 m
 a – b,  b – c ,  c – a ≤ 8 m
H ≤ 40 m, h ≤ 1 m
Outdoor unit
Service port
Strainer
Ball valve
Service port
Low pressure
switch
Indoor heat exchanger
(Protection)
Service port
Strainer
Ball valve
Multiple-distributor
PUH-P8,10
L
b
c
PUH-P8,10
L
* Total bends are 15 units, and max. bends are 8 units within L + a, L + b, L + c and L + d.
High pressure switch
(Protection)
High pressure
switch (Control)
Strainer
Solenoid valve
Muffler
Compressor
Accumulator
Flare connection
Flange connection
Brazing connection
(2) Twin
a
h
H
(4) Four
a
h
H
L + a + b + c + d ≤ 70 m
L + a, L + b, L + c, L + d ≤ 50 m
 a – b ,  b –
H ≤ 40 m, h ≤ 1 m
–20–
Outdoor heat exchanger
Service port
Electric expansion valve
Capillary tube
< Cooling operation
<
Heating operation
b
PUH-P8,10
L + a + b ≤ 70 m
L
L + a, L + b ≤ 50 m
 a – b  ≤ 8 m
H ≤ 40 m, h ≤ 1 m
b
c
d
L
PUH-P8,10
c ,  c – d,  d – a  ≤ 8 m