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(C) In case of multiple-row installation (for roof top use, etc.)
1.
In case of installing one unit per row.
≥500
(1000)
2.
In case of installing multiple units (2 units or more) in lateral
connection per row.
H
Relation of dimensions of H, A and L are shown in the table below.
L
0<L≤1/2H
L≤H
1/2H<L
H<L
Installation impossible
Refrigerant pipe size and allowable pipe
length
Installation shall be done by a licensed refrigeration
technician, the choice of materials and installation shall
comply with the applicable national and international
codes. In Europe, EN378 is the applicable standard that
shall be used.
To persons in charge of piping work:
Be sure to open the stop valve after piping installing
and vacuming is complete. (Running the system with
the valve closed may break the compressor.)
It is forbidden to discharge refrigerant into the
atmosphere. Collect the refrigerant in accordance with
the freon collection and destruction law.
Do not use flux when brazing the refrigerant piping.
For brazing, use phosphor copper brazing filler metal
(BCuP) which does not require a flux.
(If a chlorine flux is used, the piping will corrode, and if
the flux contains fluoride, it will cause the coolant oil to
deteriorate, adversely affecting the coolant piping
system.
Installation manual
5
≥50
(100)
≥1000
(2000)
≥100
(200)
L
A
≥2000
(3000)
≥400 (600)
≥1000
(1500)
A
150 (250)
200 (300)
Selection of piping material
Piping and other pressure containing parts shall comply with the
national and international codes and shall be suitable for
refrigerant, use phosphoric acid deoxidised seamless copper for
refrigerant.
Temper grade: use piping with temper grade in function of the
pipe diameter as listed in table below.
The pipe thickness of the refrigerant piping should comply with
relevant local and national regulations. The minimal pipe
thickness for R410A piping must be in accordance with the table
below.
Temper grade
Pipe Ø
of piping material
6.4 / 9.5 / 12.7
O
15.9
O
19.1
1/2H
O=Annealed
1/2H=Half hard
Only use annealed material for flare connections.
Allowable pipe length and height difference
See the table below concerning lengths and heights. Refer to
figure 2.
Allowable pipe length
Allowable pipe length
71
Maximum total one-way piping length
L1
50 m (70 m)
Maximum height between indoor and outdoor
H1
Chargeless length
L1
(a) Parenthesized figure represents the equivalent length.
Minimal thickness t (mm)
0.80
1.00
Model
100
125
140
(a)
75 m (95 m)
30 m
≤30 m
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