Setting Up The Power Consumption Control; Permanent Power Limitation; Power Limitation Activated By Digital Inputs - Daikin Altherma EHVH08SU18CB6W Installer's Reference Manual

▪ Power meter 2:
▪ In case of a single-phase backup heater configuration, use a
single-phase power meter.
▪ In other cases, use a three-phase power meter.
Example
Single-phase outdoor unit with a three-phase backup heater:
0 0 0 0
58 0 58 0
1 5 0 1 5 0
a b
c d
  
 
e e f e
g h i j
A B C
A Outdoor unit
B Indoor unit
C DHW tank
a Electrical cabinet (L
supply
b Electrical cabinet (L
supply
c Power meter (L /N)
1
d Power meter (L /L
1
e Fuse (L /N)
1
f Fuse (L /L /L /N)
1 2 3
g Outdoor unit (L /N)
1
h Indoor unit (L /N)
1
i Backup heater (L
1
j Booster heater (L
1
5.6 Setting up the power consumption
control
▪ The power consumption control:
▪ Is only applicable for EHVH04+08.
▪ Allows you to limit the power consumption of the entire system
(sum of outdoor unit, indoor unit, booster heater, and backup
heater).
▪ Configuration: Set the power limitation level and how it has to
be achieved via the user interface.
▪ The power limitation level can be expressed as:
▪ Maximum running current (in A)
▪ Maximum power input (in kW)
▪ The power limitation level can be activated:
▪ Permanently
▪ By digital inputs
5.6.1

Permanent power limitation

Permanent power limitation is useful to assure a maximum power or
current input of the system. In some countries, legislation limits the
maximum power consumption for space heating and DHW
production.
ERLQ004~008CA + EHVH04+08SU18+26CB6W
Daikin Altherma – Low temperature split
4P449978-1B – 2018.07
/N): Preferential kWh rate power
1
/L /L /N): Normal kWh rate power
1 2 3
/L /N)
2 3
/L /L /N)
2 3
/N)
5 Application guidelines
P
i
a
DI
b
t
P Power input
i
t Time
DI Digital input (power limitation level)
a Power limitation active
b Actual power input
Setup and configuration
▪ No additional equipment needed.
▪ Set the power consumption control settings in [A.6.3.1] via the
user interface (for the
"8 Configuration" on page 48):
▪ Select full time limitation mode
▪ Select the type of limitation (power in kW or current in A)
▪ Set the desired power limitation level
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 at
least one electrical heater (backup heater step 1 or
booster heater).
5.6.2 Power limitation activated by digital
inputs
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 c
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
description of all settings,
Installer reference guide
see
21