Power Limitation Process - Daikin Altherma 3 R MT F Series Installer's Reference Manual

6 | Application guidelines

6.5.3 Power limitation process

Installer reference guide
48
▪ Specification of the digital inputs:
- DI1: S9S (limit 1)
- DI2: S8S (limit 2)
- DI3: S7S (limit 3)
- DI4: S6S (limit 4)
▪ Refer to the wiring diagram for more information.
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 outdoor unit 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 Turns OFF the backup heater.
2 Limits the outdoor unit.
3 Turns OFF the outdoor unit.
Example
If the configuration is as follows: Power limitation level does NOT allow operation
of backup heater (step 1).
Then power consumption is limited as follows:
P
h
c
b
a
A B
P Produced heat
h
C Consumed energy
e
A Outdoor unit
B Backup heater
a Limited outdoor unit operation
b Full outdoor unit operation
c Backup heater step 1 turned ON
"Power consumption
C
e
4
control" [ 224]):
ERRA08~12E + ELVZ12S18+23E
Daikin Altherma 3 R MT F
4P708478-1 – 2023.05