- 42 -
INSTALLATION
• Calculation of the useful capacity of the vessel
(Cu):
• Calculation of the real capacity of the vessel
(Cr):
(Refer to the § 1 - page 48 - chapter V - SETTINGS
OF THE INSTALLATION TYPES ).
When the boiler directly supplies an under floor hea-
ting system and this system is also used to produce
domestic hot water (THI
5-25
C + BS
)
make sure that the installation has suffi-
cient extra capacity to utilise the excess heat produ-
ced at the end of the domestic hot water heating
cycle. This capacity should be in the region of 10 li-
ters.
Whenever the size of the installation is such that it
absorbs the maximum power of the boiler, please
ensure that there is the following minimum water
flow in the exchanger.
If the boiler directly feeds under-floor heating at low
D
T. the necessary flow may be higher. In this case,
please take the
D
P of the boiler into account and if
necessary install a header between the boiler and
the installation.
5.3 - Under-floor heating recommendations
Cu
total volume expansion
´
=
Cu
107 5
,
0 06
,
´
6 45 dm
3
,
=
=
Cr
Cu
R
-------
=
Cr
6 45
,
0 5
,
------------
12 9 litres
,
=
=
LMU
THI
-24-
0
Fig. 46
5.4 - Heat exchanger flow rate
Type
Flow
THI 5-25
1.03 m
3
/h
LMU
Q2
Q
VS
QAD 36
QAC 34
B3
THI
-21
-0
Fig. 47
Summary of Contents for THI 5-25c
Page 62: ... 77 NOMENCLATURE THI 5 25 C ...
Page 65: ... 98 NOMENCLATURE CONTROL BOX ...
