RXYSQ4~6M7V3B
VRVII-S system air conditioner
4PW17806-1C
Installation manual
5
(B) In case of stacked installation
1.
In case obstacles exist in front of the outlet side.
2.
In case obstacles exist in front of the air inlet.
(C) In case of multiple-row installation (for roof top use, etc.)
1.
In case of installing one unit per row.
2.
In case of installing multiple units (2 units or more) in lateral
connection per row.
Relation of dimensions between H, A and L is shown in the table
below.
7.
R
EFRIGERANT
PIPE
SIZE
AND
ALLOWABLE
PIPE
LENGTH
7.1.
Selection of piping material
■
Foreign materials inside pipes (including oils for fabrication)
must be
≤
30 mg/10 m.
■
Construction material: phosphoric acid deoxidized 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 R-410A piping must be in accordance with the
table below.
O = Annealed
1/2H = Half hard
■
Make sure to use the particular branches of piping that have
been selected.
■
In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the
following into account:
■
select the pipe size nearest to the required size.
■
use the suitable adapters for the change-over from inch to
mm pipes (field supply).
NOTE
■
Do not stack more than one unit.
■
About 100 mm is required as the dimension
for laying the upper outdoor unit's drain pipe.
■
Get the portion A sealed so that air from the
outlet does not bypass.
L
A
L
≤
H
0<L
≤
1/2H
250
1/2H<L
≤
H
300
H<L
Installation impossible
≥
1000
100
A
≥
300
100
A
≥
1000
≥
200
≥
2000
≥
100
≥
1500
≥
600
≥
3000
A
H
L
All field piping must be installed by a licensed refrigeration
technician and must comply with relevant local and
national regulations.
To persons in charge of piping work:
■
Be sure to open the shut-off 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.
Pipe Ø
Temper grade of piping
material
Minimal thickness
t(mm)
6.4 / 9.5 / 12.7
O
0.80
15.9
O
1
19.1
1/2H
1
