MEES18K085
SAFET
Y
HANDL
ING FOR R3
2
5
2. Installation restrictions
SAFETY HANDLING FOR R32
2-2. Installing the Hydro unit or the HBC indoor
When installing Hydro unit/HBC in machinery room or small room, take safety measures in accordance with the European
Standard, based on the system refrigerant amount and the room volume as shown in the figure 2.
(The installation restrictions can be simply found by using the flowchart.)
Figure 2
Refrigerant concentration and required quantity of safety measures
(height of ceiling space = 1.8 m)
0
10
20
30
40
50
60
70
80
0
50 100 150 200 250 300 350 400 450 500 550 600 650
SyStem refrigerant amount [kg]
NG (ISO 5149)
At least two
safety measures
are required.
At least one
safety measure
is required.
Construction guidance
Room volume [m
3
]
Do not place an ignition source in a space where Hydro unit/HBC is installed or adjacent spaces not shielded by firewalls.
Examples: Lighters, combustion heaters, combustion boilers, and combustion cookers
All of the above-mentioned restrictions apply not only to new installations but also to relocations and layout changes.
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