ON
OFF
ON
OFF
Heater
Compressor
0023
0209
t
21
EN 11/2010
AWR-MTD2-XE
INSTALLER CONNECTIONS
U I A
Description
Domestic hot water heating
0 = heat pump only
1 = electric heater only
2 = heat pump + electric heater
Legionella prevention function
with:
0 = heat pump only
1 = electric heater only
2 = heat pump + electric heater
Domestic hot water temperature
set point for Legionella prevention
Legionella prevention cycle day
MONDAY (0=no; 1=yes)
Legionella prevention cycle day
TUESDAY (0=no; 1=yes)
Legionella prevention cycle day
WEDNESDAY (0=no; 1=yes)
Legionella prevention cycle day
THURSDAY (0=no; 1=yes)
Legionella prevention cycle day
FRIDAY (0=no; 1=yes)
Legionella prevention cycle day
SATURDAY (0=no; 1=yes)
Legionella prevention cycle day
SUNDAY (0=no; 1=yes)
Legionella prevention cycle time
Enable Legionella prevention
function
0 = Not enabled
1 = Enabled
Maximum Legionella prevention
function duration
Menu
Mn02
Mn02
Mn02
Mn02
Mn02
Mn02
Mn02
Mn02
Mn02
Mn02
Mn02
Mn02
Mn02
Parameter
no.
0202
0223
0211
0213
0214
0215
0216
0218
0219
0220
0221
0222
0225
Value to be
set
2
1
Example
65°C
0
0
Example 1
0
0
0
0
02
1
20
UOM
°C
h
min.
KM4 DHW storage electric heater
An electric heater can be managed for heating the DHW
storage.
DHW storage electric heater control
The electric heater is activated to reach a temperature value
that the heat pump on its own is not able to reach.
Example:
Domestic hot water temperature produced with heat pump
0023 = 55°C
Domestic hot water temperature produced with electric
heater 0209 = 65°C.
The electric heater works so as to increase the DHW stor-
age temperature from 55°C to 65°C, figure 1
Legionella prevention function with electric heater
The Legionella prevention function ensures the elimination
of the Legionella bacteria that reside in domestic water stor-
age tanks. The temperature and duration of the Legionella
prevention cycles are typically:
• 2 minutes > 70°C
• 4 minutes > 65°C
• 60 minutes > 60°C
To enable the Legionella prevention function, set 0222=1
Description
Electric heater operating mode
0 = Heat pump only
1 = Electric heater only
2 = Heat pump + Electric heater
Domestic hot water temperature
set point with heat pump
Domestic hot water temperature
set point with heater
Menu
Mn02
Mn00
Mn02
Parameter
no.
0202
0023
0209
Value to be
set
2
Example
55
Example
65
UOM
°C
°C
1
Domestic hot water
electric heater
N U
10 11
Summary of Contents for AWR-MTD2-XE
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