8.2.3 Heat pump + DHW heater
The HP unit will operate as described in paragraph “Heat pump only”, with the following differences A) and B).
The DHW set point is reached (Comfort or Economy) using the compressor, the Over boost set point will be
achieved with the DHW heater only and the HP unit will change over to the system.
Parameters
Level
Parameter
Function description
Display & Input value
Remarks
Group Code
Default
min.
Max.
Unit
I
31
02
T ype of configuration to heat the DHW
0=Heat pump + Heater
1=Heat pump only
2=Heater only
1
0
2
-
I
31
11
DHW Comfort set temperature
50.0
40.0
60.0
0.5°C
I
31
12
DHW Economy set temperature
40.0
30.0
50.0
0.5°C
I
31
13
DHW set point hysteresis
3.0
0.5
10.0
0.5°C
I
31
14
DHW Over boost mode set point
60.0
50.0
90.0
0.5°C
I
31
15
DHW Over boost mode set point hysteresis
5.0
0.5
10.0
0.5°C
(3.0°C)
DHW set point
Comfort
Economy
DHW hysteresis
DHW tank
temperature
Compressor
ON
OFF
DHW heater
ON
OFF
(5.0°C)
Over boost hysteresis
DHW Over boost
set point (60.0°C)
(50.0°C)
(40.0°C)
The DHW heater will start with a fixed delay of 30 sec, aiming to reach the Over boost set point. Once having
reached this set point, it will start again at “Over boost set point – Over boost hysteresis” and will stop again at
“Over boost set point”
If the DHW tank keeps cooling down, when reaching DHW Comfort or Economy set point, according to the
function described in the following graph:
A) DHW tank temperature reached set point (Comfort or Economy)
105
8. Domestic Hot Water Production
Summary of Contents for AEYC-0639U-CH
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