Daikin EWAA011DAV3P - Power Limitation Process

6 | Application guidelines
Installer reference guide
50
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 – 2020.06
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 "Power consumption control"[4170]):
- 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.
6.5.3 Power limitation process
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
C
e
a
b
c
d
A B
P
h
Produced heat