Minimum Floor Area Requirements - Hisense Hi-Therma Series Service Handbook

Start-up and Operation: Check to ensure that all the stop
valves are fully opened and no obstacle exists at the inlet/
outlet sides before start-up and during the operation.
Maintenance: Periodically check the high pressure side
pressure. If the pressure is higher than the maximum
allowable pressure, stop the system and clean the heat
exchanger or remove the cause.
Maximum allowable pressure : refer to nameplate.

8.4.3.2 MINIMUM FLOOR AREA REQUIREMENTS

● The following chart and table shows the minimum floor
area (A ) required for the installation of an indoor unit
min
from a refrigerant system containing a certain refrigerant
charge (m ) of R32 (A2L refrigerant), and supposing a
c
total room height not lower than 2.2 m. (According to
IEC 60335-2-40:2018 and EN 378-1:2016).
● For m <1.84 kg, IEC 60335-2-40:2018 and EN
c
378-1:2016 do not establish any minimum floor area
restriction. In that case check local regulations to ensure
that no hard restrictions may apply.
A (m )
2
Installation restrictions for indoor units using R32 refrigerant
min
120
100
80
60
40
20
0
1.5 2
Floor mounted
A = (m
min
● A : Minimum installation area of an Indoor unit for a
min
given refrigerant charge m
installation height h0 (m
● h : Installation height of the bottom side of the indoor
0
unit + distance from the indoor unit bottom side to the
lowest part for which a refrigerant leak may release to
the indoor area.
● m : total system refrigerant charge that could be
c
released to the indoor area in case of undetected
refrigerant leak.
● LFL: Lower Flammability Limit for R32, 0.307 kg/m3 as
established by EN 378-1: 2016 and ISO 817.
● The A in the table above is calculated according to
min
the formula (EQU.1) under the following conditions:
- Floor mounted: h0 = 0.6 m
- Wall mounted: h0 = 1.8 m
- Ceiling mounted: h0 = 2.2 m
● For safety, the A must be calculated according to the
min
actual installation by professionals.
2.5 3
3.5
Ceiling mounted
Wall mounted
/(2.5*LFL^ * h )
(5/4) ^2
c 0
(kg) and considering the
c
2 ).
Minimum floor area for equipment installed inside
m (kg)
c
Floor mounted
1.84
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
● Do not charge OXYGEN, ACETYLENE, or other flammable
and poisonous gases into the refrigerant because an explosion
can occur. It is recommended that oxygen free nitrogen be
charged for these types of tests cycle when performing a
leakage test or an air-tightness test. These types of gases are
extremely dangerous.
●
Check for refrigerant leakage in detail. If a large refrigerant
leakage occurred, it would cause difficulty with breathing or
harmful gases would occur if a fire were being used in the
room.
● Fill in the label attached to the unit with the amount of
refrigerant charged and Tonnes of CO2 equivalent of
m (kg)
c
fluorinated greenhouse gases contained on the installation.
(EQU.1)
● Only use R32 as refrigerant. Other substances may cause
explosions and accidents.
●
R32 is fluorinated greenhouse gases. Its global warming
potential (GWP) value is 675. Do NOT vent these gases into
the atmosphere.
●
Tonnes of CO2 equivalent of fluorinated greenhouse gases
contained is calculated by GWP value of the refrigerant × Total
refrigerant charge [kg] / 1000 in the label.
● Mass of charged refrigerant: refer to chapter 8.3.8.1.
163
2 2
A (m ) A (m )
min min
Wall mounted
28.81 3.20
30.72 3.41
34.04 3.78
37.53 4.17
41.19 4.58
45.02 5.00
49.02 5.45
53.19 5.91
57.53 6.39
62.04 6.89
66.72 7.41
71.58 7.95
76.6 8.51
81.79 9.09
87.15 9.68
92.68 10.30
98.39 10.93
104.26 11.58
Installation
2
A (m )
min
Ceiling mounted
2.14
2.29
2.53
2.79
3.06
3.35
3.65
3.96
4.28
4.61
4.96
5.32
5.70
6.08
6.48
6.89
7.32
7.75