•
Operating principle of the domestic hot water
(DHW)
Two sanitary hot water temperatures (SHW)
can
be
programmed:
comfort
temperature
(line 1610 at 65 °C) and reduced temperature
(line 1612 àat40 °C).
The default DHW programme (line 560, 561, 562, 563
and 564) is set for a comfort temperature from 0h00
to 5h00 and from 15h00 to 18h00 and a reduced
temperature for the rest of the day.
The reduced temperature value may be useful to avoid
restarting the DHW too many times and for too long
through the day
The production of domestic hot water (DHW) is started
when the temperature in the tank is 7°C below (setting
of line 5024) the reference value temperature.
The domestic hot water (DHW) is produced by the
heat pump then completed if required by the burner. To
ensure there is an DHW value higher than 45°C, the
burner must be operated.
Depending on the setting of the parameter (1620), the
comfort temperature may be reached either
- 24 h / day,
- in line with the timer programme of the heating
circuit,
- in line with the DHW timer programme,
- during the off peak periods,
- during off-peak periods and depending on the
SHW time programme
The production of SHW has priority over heating, but the
production of SHW is managed by cycles that regulate
the time spent heating and the production of SHW when
simultaneous demands occur.
A function for switching from "reduced" to "comfort"
is available on the front panel of the user interface
).
Anti-legionella cycles may be programmed (lines 1640to
1647).
•
Fan coil units with integrated regulation
Do not use an ambient sensor in the zone concerned.
figure 11 - Domestic Hot Water performance
0
0
60
120
180
10
20
30
°C
min
50
40
60
50
40
60
0
0
15
30
10
20
30
°C
min
10 l/min
12,5 l/min
15 l/min
Increase in temperature of the tank (without drawing)
Domestic hot water temperature (with open tab).
Installation and operating manual
"
1605 - EN
"
alfea hybrid duo heat pump oil low NOx CH
- 12 -
