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4 - Installation
4.1 Installation Site
DANGER
Before installing the unit, make sure that
the building structure and/or the supporting
surface can withstand the weight of the
device. The weights of the units are detailed
in Chapter 8 of this manual.
WARNING
These units have been designed to be installed
on the floor, or on the wall. See chapter 3
(Anchoring) for details, and only for indoor
applications.
When selecting the installation site, never forget to consider as
follows:
n
Provide the required space for inspection and maintenance
n
Ensure that the installation location has adequate water drainage.
A defect in the piping could cause water leaks into the surrounding
property
n
Drain pipes should be as short as possible
n
Drain pipes must be insulated
n
Make sure that drain water cannot cause trouble for surrounding
properties
n
Use a leveling tool to ensure that the unit is truly horizontal. Water
leaks can result if the unit is not horizontally true
n
Install the unit in a site where the ambient temperature can never
be below 0°C (The unit is not suitable to work with glycol mixture)
4.2 Consideration for A2L refrigerant installation
This product contains R32 refrigerant that has a minimal
environmental impact, thanks to its low value of Global Warming
Potential (GWP). According to ISO 817, R32 refrigerant is classified
as A2L, which is mildly flammable, since the flame propagation rate
is low, and non-toxic. R32 refrigerant can burn slowly when all the
following conditions are present:
n
The concentration is between the lower and upper flammability
limit (LFL & UFL).
n
T Wind velocity<propagation of flame velocity
n
Energy of the ignition source>Minimum ignition energy
Safety class (ISO 817)
A2L
PED Group
1
Practical limit (kg/m3)
0.061
ATEL/ ODL (kg/m3)
0.30
LFL (kg/m3) @ 60°C
0.307
Vapour density @25°C, 101.3 kPa (kg/m3)
2.13
Molecular mass
52.0
Boiling point (°C)
-52
GWP (100 yr ITH)
675
GWP (ARS 100 yr ITH)
677
Autoignition temperature (° C)
648
Minimum surface required for the site of installation
The requirements for installation space of the appliance are
determined according to the refrigerant charge amount [mref],
used in the appliance. The minimum indoor floor space compared
with the amount of refrigerant is defined in EN-378 standard and
correspond roughly as shown in the graph below: based on the type
of installation (floor mounted or wall mounted), the space required
for the room, in which the indoor unit is installed, is different, as a
function of the refrigerant charge.
Minimum required surface for the Occupied Space in which the unit is installed for Comfort Application based on R32 charge of the entire system.
NOTE
A forced ventilation is required if the ratio
between the refrigerant charge and the volume
of the room in which the WHE is installed is
higher than 0.063 kg/m
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