7.4.3 Frost protection based on Outgoing water temperature
The frost protection function is always active, even when the heat pump is OFF.
The water pump is activated if the Outgoing water temperature is less than the start temperature and deactivated
when the Outgoing water temperature rises back “Outgoing water temperature set point + Hysteresis”
Note1: The additional water pump will be “ON”.
Note2: When the Backup heater is enabled, and Frost protection is turned ON, the heater to heat the water will be
activated if the Outgoing water temperature is lower than 4°C and it will be stopped if the Outgoing water
temperature reaches.
Parameters
Level
Parameter
Function description
Display & Input value
Remarks
Group Code
Default
min.
Max.
Unit
I
43
21
Start temperature of Frost protection on Outgoing
water temperature
4.0
0.0
10.0
0.5°C
I
43
22
Hysteresis of Outgoing water temperature
3.0
0.5
5.0
0.5°C
I
43
13
Backup heater set point during Frost protection
4.0
0.0
10.0
0.5°C
I
43
14
Hysteresis of Outgoing water temperature
3.0
0.5
5.0
0.5°C
I
51
46
T erminal 46 : DHW Electric heater or Backup heater
0=DHW Electric heater
1=Backup heater
0
0
1
-
(3.0°C)
(4.0°C)
start temperature
hysteresis
Water pump deactivation
Outgoing water temperature
Water Pump ON
(3.0°C)
(4.0°C)
hysteresis
Backup heater
Outgoing water temperature
Backup heater ON
OFF
OFF
Backup heater
set point
70
7. Unit Management
Summary of Contents for AEYC-0639U-CH
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