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Refrigerant Piping; General Notes Appliance With R32 Refrigerant - Hitachi YUTAKI S COMBI Series Handleiding

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  • DUTCH, pagina 79

NOTE
In case of not able to proceed with any of option above. Please
consider to select other outdoor unit combination option (reduce
piping length, monobloc systems, etc...).
‹ Table 1
  
Min floor area (A
m
(Kg)
c
1.7
1.84
4.70
2.0
5.11
2.2
5.62
2.4
6.13
2.6
7.17
2.8
8.31
3.0
9.54
3.2
10.86
3.4
12.26
3.6
13.74
3.8
15.31
4.0
16.96
‹ Table 2 (Examples)
  
Minimum opening for natural ventilation A
(dm
m
(Kg)
Room A area (m
c
7
10
13
1.84
-
-
2.0
-
-
2.2
-
-
2.4
-
-
2.6
0.08
-
2.8
0.58
-
3.0
1.08
-
3.2
1.57
0.36
3.4
2.07
0.90
3.6
2.57
1.45
0.29
3.8
3.07
1.99
0.87
4.0
3.57
2.54
1.46

NOTE
The minimum opening area for natural ventilation between room A
and room B is calculated by the following formula:
A
= 1.51 x (m
-m
) x (A
nv,min1
max
c
m
= 0.571 x h
x (A
max
0
roomA
Where:
• A
:minimum opening for natural ventilation
nv,min1
between room A and room B, in dm
• A
: room A area, in m
2
roomA
• m
: the allowable maximum refrigerant charge in the
max
room A, in kg.
• Mark "-" in the above table indicates that the room
PMML0668 rev.0 - 09/2024 - 1000017438
) (m
)
2
min
H
0
1.8
1.9
4.44
4.21
4.82
4.57
5.31
5.03
5.79
5.48
6.39
5.94
7.41
6.65
8.51
7.64
9.68
8.69
10.93
9.81
12.26
11.0
13.66
12.26
15.13
13.58
nvmin1
) h
=1.7 m
2
0
)
2
15
18
20
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.12
-
-
0.73
-
-
/m
)
˄(1/2)
roomA
max
)
˄(1/2)
.
2
.
A is large enough for installation without adjacent
room B.
• For intermediate refrigerant charges, room A area
and installation height, select the higher charge
value, the smaller room area and the lower height
value to choose the A
nv,min1
refrigerant charge is 2.9 kg, room A area is 8 m
the installation height is 1.85 m, then A
according to the table (h
0
3.2 Service space
Top view
Units in mm.

4. REFRIGERANT PIPING

4.1 General notes appliance with R32 refrigerant

This symbol displayed on the unit indicates that
this appliance is filled with R32, an odourless
flammable refrigerant gas with low burning
velocity (A2L class pursuant to ISO 817). If the
refrigerant is leaked, there is a possibility of
A2L
ignition if it enters in contact with an external ignition
source.
Do not use means to accelerate the defrosting process
or to clean, other than those recommended by the
manufacturer.
The appliance shall be stored in a room without
continuously operating ignition sources (for example:
open flames, an operating gas appliance or an operating
electric heater).
Do not pierce or burn.
Be aware that refrigerants may not contain an odour.
RISK OF EXPLOSION
The compressor must be stopped before removing the
refrigerant pipes.
All service valves must be fully closed after pumping
down operation.
This symbol displayed on the unit indicates that
this appliance shall be handled by authorized
service personnel only, referring to the
Installation Manual.
. For example, if the
and
2
=1.08 dm
nv,min1
=1.7 m)
Front view
2
EN
3

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