Power Limitation Process; Current Limitation By Current Sensors - Daikin Altherma 3 GEO Series Installer's Reference Manual

5 | Application guidelines

5.6.3 Power limitation process

5.6.4 Current limitation by current sensors

Installer reference guide
48
Configuration
▪ Set the power consumption control settings in [9.9] via the user interface (for the
description of all settings, see
- Select limitation by digital inputs.
- Select the type of limitation (power in kW or current in A).
- Set the desired power limitation level corresponding to each digital input.
INFORMATION
In case more than 1 digital input is closed (at the same time), the digital input priority
is fixed: DI4 priority>...>DI1.
The compressor has better efficiency than the electrical heater. Therefore, the
electrical heater is limited and turned OFF first. The system limits power
consumption in the following order:
1 Limits the backup heater.
2 Turns OFF the backup heater.
3 Limits the compressor.
4 Turns OFF the compressor.
Example
If the power limitation level does NOT allow operation of full backup heater
capacity, then power consumption is limited as follows:
P
h
d
c
b
a
A B
P Produced heat
h
C Consumed energy
e
A Compressor
B Backup heater
a Limited compressor operation
b Full compressor operation
c Limited backup heater operation
d Full backup heater operation
INFORMATION
Restriction: Current limitation by current sensors is only available for 3-phase setups
([9.3.2]=2 (Installer settings > Backup heater > Voltage = 400V, 3ph)).
NOTICE
Disconnected sensor. If you use current limitation by current sensors and one of the
sensors is disconnected, the corresponding phase is not limited anymore.
"Power consumption
C
e
4
control" [ 190]):
EGSAH/X06+10UDA9W
Daikin Altherma 3 GEO
4P598592-1A – 2019.12