3. IMPORTANT NOTICE
3.1 INFORMATION
● PLEASE READ THE MANUAL CAREFULLY BEFORE
STARTING TO WORK ON THE INSTALLATION OF
THE AIR TO WATER HEAT PUMP SYSTEM. Failure
to observe the instructions for installation, use and
operation described in this documentation may result
in operating failure including potentially serious faults,
or even the destruction of the air to water heat pump
system.
● Verify, in accordance with the manuals which appear
in the outdoor and indoor units, that all the information
required for the correct installation of the system is
included. If this is not the case, contact with your dealer.
● Hisense pursues a policy of continuous improvement in
product design and performance. The right is therefore
reserved to vary specifications without notice.
● Hisense cannot anticipate every possible circumstance
that might involve a potential hazard.
● This air to water heat pump has been designed for
standard water heating for human beings only. Do not
use this for other functions that are not included in the
master controller.
● No part of this manual may be reproduced without
written permission.
● If you have any questions, contact with your dealer.
● Check and make sure that the explanations of each
part of this manual correspond to your air to water heat
pump model.
● Refer to the models codification to confirm the main
characteristics of your system.
● Signal words (NOTE, DANGER and CAUTION) are
used to identify levels of hazard seriousness. Definitions
for identifying hazard levels are provided in initial pages
of this document.
● The operation modes of these units are controlled by
the master controller.
● This manual should be considered as a permanent
part of the air to water heat pump. It gives a common
description of and information for this heat pump indoor
unit.
● Keep the water temperature of the system above the
freezing temperature.
3.2 MINIMUM FLOOR AREA REQUIREMENTS
● The following chart and table show 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
<1.84 kg, IEC 60335-2-40:2018 and EN
m
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 given
min
refrigerant charge m
height h
(m
2
).
0
●
h0: Installation height of the bottom side of the indoor 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 released to
c
the indoor area in case of undetected refrigerant leak.
●
LFL: Lower Flammability Limit for R32, 0,307 kg/m
established by EN 378-1:2016 and ISO 817.
Minimum floor area for equipment installed inside
A
(m
min
m
(kg)
c
Floor mounted
1.84
28.81
1.9
30.72
2.0
34.04
2.1
37.53
2.2
41.19
2.3
45.02
2.4
49.02
2.5
53.19
2.6
57.53
2.7
62.04
2.8
66.72
2.9
71.58
3.0
76.6
3.1
81.79
3.2
87.15
3.3
92.68
3.4
98.39
3.5
104.26
●
The A
in the table above is calculated according to the
min
formula (EQU.1) under the following conditions:
●
Floor mounted: h0 = 0.6m
●
Wall mounted: h0 = 1.8m
●
Ceiling mounted: h0 = 2.2m
●
For safety, the A
must be calculated according to the actual
min
installation by professionals.
3
IMPORTANT NOTICE
2.5
3
Wall mounted
Ceiling mounted
/(2.5*LFL^
* h
)
(5/4)
^2
c
0
(kg) and considering the installation
c
2
)
A
(m
2
)
min
Wall mounted
Ceiling mounted
3.20
3.41
3.78
4.17
4.58
5.00
5.45
5.91
6.39
6.89
7.41
7.95
8.51
9.09
9.68
10.30
10.93
11.58
m
(kg)
3.5
c
(EQU.1)
3
as
A
(m
2
)
min
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