Power Limitation Activated By Digital Inputs - Daikin Altherma 3 H HT F Series Installer's Reference Manual

5.6.2 Power limitation activated by digital inputs

EPRA14~18DAV3+W1 + ETVH/X16S18+23DA6V+9W(G)
Daikin Altherma 3 H HT F
4P587502-1 – 2019.07
NOTICE
Set a minimum power consumption of ±3.6 kW to guarantee:
▪
Defrost operation. Otherwise, if defrosting is interrupted several times, the heat
exchanger will freeze up.
▪
Space heating and DHW production by allowing the backup heater step 1.
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...).
C
a
5
4
3
A8P
2
1
b
A B
A Outdoor unit
B Indoor unit
C Energy management system
a Power limitation activation (4 digital inputs)
b Backup 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 = weakest limitation (highest energy consumption)
- DI4 = strongest limitation (lowest energy consumption)
▪ For the specifications of the digital inputs, and for where to connect them, refer
to the wiring diagram.
b
t
5 Application guidelines
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Installer reference guide
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