38
AW HT
GB 05/2009
DOMESTIC HOT WATER
The controller manages domestic hot water production using a 3-way valve installed outside of the unit.
The production of domestic hot water is guaranteed in both summer and winter, according to the operating limits shown in this
manual.
An electric heater should be installed inside the DHW storage cylinder to ensure the temperature does not fall below 15/20°C in
the event of extended periods of heat pump inactivity (standby).
DHW= Domestic hot water
DHW SET POINT CONTROL AND TIME PROGRAM
Parameter
number
Description
Select DHW set point
The temperature of the domestic hot water inside the storage cylinder can be controlled between a Standard
set point and a Reduced set point.
This allows a sufficient DHW storage temperature even during production of hot water for the heating system.
Set point examples
1610 Nominal DHW set point
1612 Reduced DHW set point
TWWmax Maximum standard DHW set point
Select DHW storage fill mode
1) Parameter 1620 = 24 hours/day
The DHW storage cylinder will be filled whenever the water temperature falls below the standard DHW set
point. The filling of the storage cylinder is not associated with a time program.
Example
2) Parameter 1620 = Time program HCs
The DHW storage cylinder will be filled based on the Comfort and Reduced set points selected and at the
same times set for the heating system (time program CR1).
Example
3) Parameter 1620 = Time program 4/DHW
The DHW storage cylinder will be filled based on the Comfort and Reduced set points selected and at the set
times (time program 4/DHW).
The production of domestic hot water is independent from the heating system, and in any case always has
priority.
Example
Default setting
1610 = 55
1612 = 50
1620 = 24h/day
1610
1612
1620
Parameters contained on the DOMESTIC HOT WATER operating page
0 10 20 30 40 50 60 70 80 90 100 °C
TWWR
TWWN
TWWmax
0
6
12
18
24
h
0
4
2
2
1
6
5
h
16 17
0
6
12
18
24
h
(Engineer level)
