Installation manual
7
RZQG71~140L + RZQSG100~Y1B(9)
Split system air conditioners
4P327537-1 – 2012.08
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
Refer to
for twin system, to
for double twin system.
Main pipe (pipe between outdoor and first branch).
The pipes should have the same size as the outdoor
connections.
Pipe between first branch and second branch (L2+L3) (only for
double twin).
Pipe between branch and indoor units (L2~L3 for twin, L2~L4 for
triple and L4~L7 for double twin).
These pipe sizes must have the same size as the connected
indoor units pipe sizes. Branch: see marking '
' on figures
,
and
.
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
(a)
(a) In case of twin, triple and double twin applications, the listed refrigerant pipe sizes
relate to the main pipes only. (L1 = the pipes between the outdoor unit and the
branch in figures
Gas pipe
Model
Size-down
Standard size
Size-up
RZQG71
Ø12.7
Ø15.9
—
RZQG100~140
—
Ø15.9
Ø19.1
RZQSG100~140
—
Ø15.9
Ø19.1
Liquid pipe
Model
Size-down
Standard size
Size-up
RZQG71~140
Ø6.4
Ø9.5
Ø12.7
RZQSG100~140
Ø6.4
Ø9.5
Ø12.7
Liquid
Ø9.5
Gas
Ø15.9
NOTICE
For new installations, use the standard pipe sizes.
When using existing pipes, size-up is allowed as
mentioned in the table above.
Additional restrictions towards allowable pipe lengths,
as mentioned in the table
, must be taken into
account.
Not using the standard pipe size may result in
capacity decrease. The installer must acknowledge
this and judge this very carefully in function of the
complete installation.
