Piping Length And Elevation - Heat Controller B-MMC09FA-1 Service Manual

Piping length and elevation

Multi Piping Type
Max total length
Capacity of all pipes
(A+B/A+B+C)
18 kBtu 30 m (100 ft)
24 kBtu 30 m (100 ft)
36 kBtu 45 m (150 ft)
Indoor Capacity
9 kBtu 9.52 mm (3/8")
12 kBtu 9.52 mm (3/8")
18 / 24 kBtu
h1
CAUTION: Capacity is based on standard length and maximum allowance length is on the
basis of reliability.
Max length of
each pipe
(A/B/C)
15 m (50 ft)
15 m (50 ft)
15 m (50 ft)
Gas Liquid
6.35 mm (1/4")
6.35 mm (1/4")
A
B
h1
B
Max Elevation
Min length of
between each
each pipe
indoor unit and
(A/B/C)
outdoor unit (h1)
3 m (10 ft) 7.5 m (25 ft)
3 m (10 ft) 7.5 m (25 ft)
3 m (10 ft) 7.5 m (25 ft)
Pipe Size
Standard Length
7.5 m (25 ft)
7.5 m (25 ft)
36 kBtu
h2
h1
Max elevation
between indoor
units (h2)
7.5 m (25 ft)
7.5 m (25 ft)
7.5 m (25 ft)
Additional
Refrigerant
20 g/m (0.22 oz/ft)
20 g/m (0.22 oz/ft)
A
B
C
h1
h1
Service Manual 21
Installation
h2
h2