
8.4 EHS (External heat source)
The EHS turns OFF/ON depending of the setting the HP unit.
ON/OFF based on Room air temperature measured by the probe on Remote controller.
ON/OFF based on water set point.
Parameters
Level
Parameter
Function description
Display & Input value
Remarks
Group Code
Default
min.
Max.
Unit
I
47
00
E HS type of function
0=disable
1=Replacement mode
2=Supplementary mode
0
0
2
-
I
51
41
Terminal 41-42 : EHS (External heat source for space
heating)
0=disable
1=enable
0
0
1
-
Buffer tank
DHW tank
Space Heating
M
M
Pump
DHW 3way valve
Mixing valve
HP unit
EHS
The function of EHS (External heat source) is to heat the Heating system in Replace or Supplementary mode by
HP unit when the heating capacity of HP unit is decreased by lower Outdoor air temperature and when HP unit is
stopped due to the failure of sensors.
The EHS function has no impact on the DHW heating mode.
If enabling the EHS, it needs to be connected to Buffer tank as picture below.
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8. Domestic Hot Water Production
Содержание AEYC-0639U-CH
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