Power Limitation Process - Daikin EWAA0 DAV3P Series Installer's Reference Manual

6 | Application guidelines

6.5.3 Power limitation process

Installer reference guide
50
a Power limitation active
b Actual power input
Setup
▪ Demand PCB (option EKRP1AHTA) needed.
▪ Maximum four digital inputs are used to activate the corresponding power
limitation level:
- DI1 = strongest limitation (lowest energy consumption)
- DI4 = weakest limitation (highest energy consumption)
▪ 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 backup heater. Therefore, the
backup 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 outdoor unit.
4 Turns OFF the outdoor unit.
Example
If the configuration is as follows: Power limitation level does NOT allow for backup
heater operation (step 1 and step 2).
Then power consumption is limited as follows:
P
h
d
c
b
a
A B
P Produced heat
h
"Power consumption
C
e
4
control" [ 170]):
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 – 2020.06