9.5.3
Operation of the switch between heating and production
of domestic hot water
The system does not allow the simultaneous production of heating and
domestic hot water.
The switch logic between domestic hot water mode and heating mode
operates as follows:
Fig.72
MW
-5000541-2
1
2
3
4
5
A
A
C
C
B
T
t
Cp
D
Tp
0
A Min. CH before DHW (DP048): Minimum heating
duration between two domestic hot water production
runs
B Max. DHW duration (DP047): Maximum authorised
duration for domestic hot water production
C Duration for producing domestic hot water (less than
DP047) to reach the DHW set point
Cp DHW comfort setpoint (DP070): Domestic hot water
"Comfort" set point temperature
DHW reduced setpoint (DP080): Domestic hot water
"Reduced" set point temperature
T Temperature
Tp DHW tank temp bottom (DM001): Domestic hot
water temperature (lower temperature sensor)
DHW tank temp top (DM006): Domestic hot water
temperature (upper temperature sensor)
t Time
D Hysteresis DHW (DP120): Set point temperature
differential triggering the domestic hot water tank to
be charged
Tab.91
Phase
Operating description
1
Domestic hot water production only. When switching on, if domestic hot water production is authorised
and acceleration of domestic hot water production is not required, DHW management ((DP051) config
ured as ECO (Only HP)), a domestic hot water production cycle is started up for a maximum duration
that can be adjusted and fixed by the Max. DHW duration(DP047) parameter.
In the event of insufficient heating comfort, the heat pump is running too long in domestic hot water
mode: reduce the maximum duration of domestic hot water production.
2
Heating only. Production of domestic hot water is off. Even if the domestic hot water set point is not
reached, a minimum heating period is forced. This period can be adjusted and defined with the Min. CH
before DHW parameter (DP048). After the heating period, tank loading is again enabled.
3
Domestic hot water production only. When the domestic hot water set point is reached, a period in heat
ing mode begins.
4
Heating only. When the Hysteresis DHW(DP120) differential is reached, domestic hot water production
is triggered.
If there is not enough domestic hot water (e.g. if the domestic hot water does not heat up quickly
enough): reduce the trip differential (hysteresis) by modifying the value of the Hysteresis DHW parame
ter (DP120). The DHW tank will then heat up the water more quickly.
5
Domestic hot water production only.
9 Settings
80
7762758 - v05 - 19082020
