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•
In vehicles or vessels.
•
Where acidic or alkaline vapours are present.
3.5
PREPARATION FOR INSTALLATION
! NOTE !
Grant R290 heat pumps should be stored and transported
in an upright position. If not, then the heat pump MUST be
positioned in an upright position for at least four hours
before being operated.
3.5.1
R290 REFRIGERANT
The Grant Aerona 290 heat pump contains R290 refrigerant gas.
The density of this gas is greater than that of air, so in the event of
leakage it tends to disperse and stratify, accumulating in niches,
depressions in the ground or underground regions.
It is mandatory to comply with the protective zones given in this
manual, when installing the units. The protective zones have
been designed in accordance with EN 60079-10-1, estimating an
appropriate refrigerant loss in order to guarantee the safety of the
units in the installation area.
The protective is defined as an area around the heat pump in
which, in the event of a leakage of refrigerant gas, a flammable
atmosphere could be formed for a short time, within which it
is necessary to implement all the precautions described in the
manual.
In the absence of specific standards or regulations, when using
the unit in an industrial or working environment, it is advisable
to carry out the classification of places with explosion hazards
considering the ATEX Directive 1999/92 (Directive 89/391).
No sources of ignition should be present in the protective zone,
including:
•
Flammable gases and sprays, self-igniting powders;
•
Electrical equipment that is not suitable for use in potentially
explosive areas (zone 2 according to Directive 89/391);
•
Naked flames, heated surfaces (maximum surfaces
temperature of 360°C and processing by heat; smoking is
prohibited, even for electronic cigarettes.
•
Sparks, electrostatic charges, direct and indirect lightning
effects, eddy currents and cathodic protection.
•
Ignition sources due to remote processes (ionising and non-
ionising radiation).
•
Permanent electrical sources (switches, lamps, etc.) or other
possible triggers.
In addition, protective zones must NOT:
•
Include potentially dangerous areas or features such as
wells, manholes, openings to the sewage system and
other openings to underground places and premises (e.g.
garages), river drains, power lines, flammable deposits,
electrical installations, etc.
•
Include doors, windows or glass panes, to prevent the
possible return of the gas inside the building.
•
Extend towards neighbouring residential properties, parking
areas, public access sites, roads or railways.
Beyond the protective zone in the event of a refrigerant leak,
the concentration of refrigerant gas in the air is typically below
the critical levels for the formation of flammable or hazardous
atmospheres. You must take reasonable care to:
•
Prevent accumulation and stagnation in underground spaces,
drains, manholes, cellars. etc.
•
not place close to building vents.
•
to not use naked flames and other direct heat sources.
Ensure to comply with national and local regulations for the
installation of machinery (as applicable) in order to prevent the
formation of fire hazards and to prevent gases from seeping
underground into openings to the ground or floors below. No
structural modifications may be made in the protective zone
that would alter their extent or change the behaviour of the air-
refrigerant mixture.
It is also strictly forbidden to tamper with, alter, remove or
compromise, even partially, the functionality of the devices,
guards and warnings provided for the safety of property and
persons.
Page 18
! WARNING !
Do not pierce the evaporator or refrigerant circuit or
expose the heat pump to fire.
3.6
PROTECTIVE ZONES
3.6.1
GROUND INSTALLATIONS
Figure 3-6: Ground installation
Table 3-3: Ground installation protective zone
Dimension
A
3.6.2
GROUND INSTALLATIONS IN FRONT OF A
BUILDING WALL
Figure 3-7: Ground installation in front of a building
Table 3-4: Ground installation in front of a building protective
zone
Dimension
A
2100
3155 (for 4kW, 12kW & 15.5kW)
B
3223 (for 6.5kW & 9kW)
C
250
D
1000
Section 3: Installation Information
Distance (mm)
1000
A
B
Distance (mm)
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