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Installation manual
7
AZQS100~1Y1B
Split system air conditioners
4P332194-1B – 2015.01
2.
In case of installing multiple units (2 units or more) in lateral
connection per row.
Relation of dimensions of H, A and L are shown in the table below.
8.
Refrigerant pipe size and allowable
pipe length
8.1.
Selection of piping material
Construction material: 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.
Only use annealed material for flare connections.
8.2.
Refrigerant pipe size
The pipes should have the same size as the outdoor connections.
8.3.
Allowable pipe length and height difference
See the table below concerning lengths and heights.
L
A
L
≤
H
L
≤
1/2H
≥
250
1/2H<L
≤
H
≥
300
H<L
Installation impossible
DANGER
Piping and other pressure containing parts shall
comply with the applicable legislation and shall be
suitable for refrigerant. Use phosphoric acid
deoxidised seamless copper for refrigerant.
Installation shall be done by an installer, the choice of
materials and installation shall comply with applicable
legislation. In Europe the EN378 is the application
standard that shall be used.
NOTICE
To persons in charge of piping work:
Be sure to open the stop valve after piping installing and
vacuuming is complete. (Running the system with the
valve closed may break the compressor.)
INFORMATION
It is forbidden to discharge refrigerant into the atmosphere.
Collect the refrigerant in accordance with the freon
collection and destruction law.
NOTICE
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.
A
L
H
Pipe Ø
Temper grade
of piping material
Minimal thickness
t (mm)
6.4 / 9.5 / 12.7
Annealed
0.80
15.9
Annealed
1.00
19.1
Half hard
Refrigerant pipe size
Gas pipe
Ø15.9
Liquid pipe
Ø9.5
Allowable pipe lenght
Model
100
125
140
Maximum total one-way piping length
(a)(b)
(a) Parenthesized figure represents the equivalent length
(b) For details about the combination of your outdoor and indoor unit, see the
engineering databook.
L1
50 m (70 m)
Minimum total one-way piping length
L1
5 m
Maximum height between indoor and outdoor
H1
30 m
Chargeless length
L1
≤
30 m
H1
L1