Power Limitation Activated By Digital Inputs - Daikin EPRA16DAW1 Installer's Reference Manual

5.6.2 Power limitation activated by digital inputs

EPRA14~18DAV3+W1 + ETBH/X16DA6V+9W
Daikin Altherma 3 H HT W
4P587501-1A – 2020.01
Power limitation is also useful in combination with an energy management system.
The power or current of the entire Daikin system is limited dynamically by digital
inputs (maximum four steps). Each power limitation level is set via the user
interface by limiting one of the following:
▪ Current (in A)
▪ Power input (in kW)
The energy management system (field supply) decides the activation of a certain
power limitation level. Example: To limit the maximum power of the entire house
(lighting, domestic appliances, space heating...).
D
a
5
4
3
A8P
2
1
b
A B C
A Outdoor unit
B Indoor unit
C DHW tank
D Energy management system
a Power limitation activation (4 digital inputs)
b Backup heater
c Booster heater
P
i
a
DI1
DI3
DI4
P Power input
i
t Time
DI Digital inputs (power limitation levels)
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:
DI 1 S9S
DI 2 S8S
DI 3 S7S
DI 4 S6S
▪ Refer to the wiring diagram for more information.
c
b
t
limit 1
limit 2
limit 3
limit 4
5 Application guidelines
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Installer reference guide
55