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LIA 0608HWCF M - LIA 0911HWCF M English
5.3.2 Minimum installation space
requirements:
The heat pump described in this manual is a refrigerant-filled
device that must be installed in accordance with the require-
ments of EN 378-1_4:2016. With regard to the standard, it
must be ensured that the installation room is of a sufficient size
such that the limit values for toxicity and flammability are not
exceeded indoors.
When considering the minimum installation space for the room,
the filling quantity of the system is decisive. Please note that ex-
tending the connection lines of the device can result in a
changed filling quantity of the system. Therefore, check
whether the installation room is suitable, even when taking a
potentially higher refrigerant fill quantity into account. The in-
stallation room is defined as any space that contains refriger-
ant-containing parts (indoor unit, outdoor unit and refrigerant
pipes) or into which refrigerant could be released. Multiple
rooms that have suitable openings (that cannot be closed) be-
tween the individual rooms or which are connected to a com-
mon ventilation supply, return or exhaust system that does not
contain the evaporator or condenser shall be treated as a single
room.
As a general rule, care should be taken during installation work
to keep refrigerant lines to a necessary minimum.
To check the necessary conditions for installation, proceed as
follows:
Determination of the refrigerant fill quantity:
Please note that altering the refrigerant fill quantity may be nec-
essary due to the extension of the connection pipes.
Use the table below in Cap. 5.3.4 on page 12 Minimum room
volume to check whether the installation conditions are suffi-
cient for the operation of the heat pump.
5.3.3 Toxicity and flammability limit values:
If the refrigerant fill quantity is below 1.842 kg, the toxicity limit
value is the determining factor for the installation conditions.
The fill quantity is the toxicity limit value x room volume.
The toxicity limit value corresponds to the ATEL/ODL values or
the practical limit value, whichever is higher.
R32 ATEL/ODL = 0.30
R32 practical limit = 0.061
Concentration limit (toxicity):
R32 = 1 x (0. 3) = 0. 3 kg per 1 m³ volume
NOTE
ººººº
The installer must ensure a room volume of 1 m³ per 0.3 kg of
R32 refrigerant.
LIA 0608 (1.5 kg R32) = minimum room volume 5 m³
LIA 0911 (1.65 kg R32) = minimum room volume 5.50 m³
If the refrigerant fill quantity of the system exceeds 1.842 kg,
the flammability limit value is the determining factor for the in-
stallation conditions. It should be noted here that, in contrast to
the toxicity limit value, this relates to the room area.
Calculation of the maximum permissible refrigerant fill quantity
for a given area:
Calculation of the minimum area for a given refrigerant fill
quantity:
Mmax is the maximum permissible fill quantity in a room in kg.
m is the refrigerant fill quantity in the system in kg.
Amin is the required minimum room area in m².
LFL the lower flammability limit (LFL) in kg/m³
A is the room area in m².
h0 is the height factor of the device, according to EN60335-2-
40 = 1.45 m position of refrigeration circuit components
= 2,5 x LFL x h0 x A
5
4
1
2
M
max
A =
2
5
4
m
2,5 x LFL x h0
(
)
2
min
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