Power Limitation Process; Current Limitation By Current Sensors - Daikin EWSAH06D 9W Series Installer's Reference Manual

6 | Application guidelines

6.6.3 Power limitation process

6.6.4 Current limitation by current sensors

Installer reference guide
54
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.
Current sensors can be used to limit the consumption of the heat pump on every
phase taking into account the set household fuse and the actual consumption of
other appliances.
Current sensors must be installed before the main fuses on each phase to make
use of this feature. This function can be useful in countries where the government
gives incentives to limit the fuse sizes.
C
i
a
CL
b
c
Ci Current input
t Time
C
e
d
t
EWSAH/X06D
Daikin Altherma 3 WS
4P675764-1 – 2022.04