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