
117
If the Par4620=2 or 3 (enabled during Defrost), the Backup heater shall be turned ON during Defrost operation
when Outgoing water temperature is lower than Par4623. Once the water temperature reaches the set point of
P hysteresis, the Backup heater shall be turned OFF.
In order to operate the Backup heater for Defrost operation with Par4620=2 or 3, it is necessary to set the
Par4600=3 (Supplementary mode).
Backup heater enabled during Defrost
Parameters
Level
Parameter
Function description
Display & Input value
Remarks
Group Code
Default
min.
Max.
Unit
I
46
00
B ackup heater type of function
0=disable
1=Replacement mode
2=Emergency mode
3=Supplementary mode
0
0
3
-
Par4600 and Par4700
are synchronize
Par4600=1, 2, 3
→ Par=4700=0
Par4700=1, 2
→ Par4600=0
I
46
20
F reeze protection functions
0=disable
1=enabled during Start-up
2=enabled during Defrost
3=enabled during Start-up and Defrost
0
0
3
-
I
46
23
Outgoing water temperature set point during Defrost
24.0
10.0
50.0
0.5°C
I
46
24
Hysteresis water temperature set point during Defrost
5.0
0.5
10.0
0.5°C
(5.0°C)
Backup heater ON
set point (24.0°C)
hysteresis
Outgoing water temperature
Backup heater ON
OFF
8. Domestic Hot Water Production
Summary of Contents for AEYC-0639U-CH
Page 156: ...20810030 M ...