Panasonic Aquarea WH-ADC0309J3E5 Planning And Installation Manual page 104

Planning
Indoor floor area requirement for R32 models
Due to the classification of R32 with regard to safety, toxicity and flammability, limitations regarding
the refrigerant quantity in relation to the floor area must be observed based on the applicable
standards:
Symbol
m
c
m
max
m
excess
A
room
B
room
H
VA
A
min total
5 Step A: Determine the maximum allowed refrigerant charge (m
104
● If the total refrigerant charge in the system is <1.84 kg, no additional minimum floor
area is required.
● If the total refrigerant charge in the system is ≥1.84 kg, perform the following steps
to determine, if the room is large enough to install the indoor unit or if any additional
safety measures need to be taken.
Description
Total refrigerant charge in system
where:
Total refrigerant charge in system, m
Maximum allowed refrigerant charge
Excess refrigerant charge quantity (m
Floor area of the installation room
Floor area of the room adjacent to the installation room
Installation height
Minimum ventilation opening area
min
Minimum required total floor area (A
1. Calculate the floor area of the installation room (A
2. Based on Table I (see below), select the maximum allowed refrigerant charge (m
corresponds to the calculated A
3. If the maximum allowed refrigerant charge is larger than the total refrigerant charge in
the system (m > m ), the unit can be installed in the installation room at the installation
max c
height of H = 600 mm, which is specified in Table I, and without additional floor area or any
additional ventilation.
4. If not (m < m ), proceed to Step B and Step C, to determine how the floor area of the
max c
installation room (A
room
providing sufficiently large ventilation openings between the two rooms.
(kg) = Pre-charged refrigerant amount in unit (kg)
c
+ Additional refrigerant amount after installation (kg)
– m )
c max
+ B )
room room
value.
room
) can be "enlarged" by the floor area of an adjacent room (B
Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022
):
max
).
room
Unit
kg
kg
kg
m²
m²
m
cm²
m²
), which
max
) by
room