Daikin Altherma 3 H MT W - Power Limitation Process

6 | Application guidelines
Installer reference guide
62
EPRA08~12EAV3+W1 + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT W
4P634885-1 – 2021.03
▪ 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 "Power consumption control"[4208]):
- 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.
6.6.3 Power limitation process
The outdoor unit has better efficiency than the electrical heaters. Therefore, the
electrical heaters are limited and turned OFF first. The system limits power
consumption in the following order:
1 Limits certain electrical heaters.
If… has priority Then set the priority heater via the
user interface to…
Domestic hot water production Booster heater (if applicable)
Result: The backup heater will be
turned OFF first.
Space heating Backup heater
Result: The booster heater (if
applicable) will be turned OFF first.
2 Turns OFF all electrical heaters.
3 Limits the outdoor unit.
4 Turns OFF the outdoor unit.
Example
If the configuration is as follows:
▪ Power limitation level does NOT allow operation of both booster heater and
backup heater (step1 and step2).
▪ Priority heater = Booster heater (if applicable).
Then power consumption is limited as follows: