Installation Servicing Space; Refrigerant Pipe Size And Allowable Pipe Length - Daikin VRV III-S Installation Manual

NOTE If drain holes of the outdoor unit are covered by a
mounting base or by floor surface, raise the unit in
order to provide a free space of more than 100 mm
under the outdoor unit.
6. I
NSTALLATION SERVICING SPACE
The connection piping outlet direction in the installation shown in
figure 4 is frontward or downward. The unit of numeric values is
mm.
When routing the piping backward, secure space of ≥250 mm on
the right side of the unit.
(A) In case of non-stacked installation
Suction side obstacle
Discharge side obstacle
Left side obstacle
Right side obstacle
Top side obstacle
Obstacle is present
(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.
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.
Installation manual
5
(See figure 4)
1 In these cases, close the
bottom of the installation
frame to prevent the
discharged air from
being bypassed
2 In these cases, only 2
units can be installed.
3 In these cases, no
restriction of height L1.
This situation is not
allowed
A
≥1000
A
≥300
(C) In case of multiple-row installation (for roof top use, etc.)
1. In case of installing one unit per row.
≥1000
2. In case of installing multiple units (2 units or more) in lateral
connection per row.
H
Relation of dimensions between H, A and L is shown in the table
below.
0<L≤1/2H
L≤H
1/2H<L≤H
H<L Installation impossible
7. R
EFRIGERANT PIPE SIZE AND ALLOWABLE
PIPE LENGTH
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 stop valve after piping installing
and vacuuming 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.
≥100
≥2000
≥200
L
A
≥3000
≥600
≥1500
L A
250
300
RXYSQ4~6P7V3B + RXYSQ4~6P7Y1B
VRVIII-S system air conditioner
4PW35338-1