EHVH/X16
Daikin Altherma - Low Temperature Split
4P313777-1 – 2012.05
Installer reference guide
16
5 Application guidelines
Example
Single-phase outdoor unit with a three-phase backup heater:
5.6
Setting up the power consumption control
Q
The power consumption control:
Q
Is only applicable for EHBH/X04+08 and EHVH/X04+08.
Q
Allows you to limit the power consumption of the entire
system (sum of outdoor unit, indoor unit, backup heater and
optional booster heater).
Q
Configuration: Set the power limitation level and how it has
to be achieved via the user interface.
Q
The power limitation level can be expressed as:
Q
Maximum running current (in A)
Q
Maximum power input (in kW)
Q
The power limitation level can be activated:
Q
Permanently
Q
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. Example: The maximum power input depends on the
area of the house and an annual fee has to be paid to the electrical
company according to the size of the installed field fuse. By
permanently limiting the maximum power or current of the system,
you can install smaller field fuses.
Setup and configuration
Q
No additional equipment needed.
Q
Set the power consumption control settings in [A.7.2] via the
user interface (for the description of all settings, see
configuration chapter):
Q
Select full time limitation mode
Q
Select the type of limitation (power in kW or current in A)
Q
Set the desired power limitation level
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:
Q
Current (in A)
Q
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…).
A
Outdoor unit
B
Indoor unit
C
DHW tank
a
Electrical cabinet (L
1
/N): Preferential kWh rate power
supply
b
Electrical cabinet (L
1
/L
2
/L
3
/N): Normal kWh rate power
supply
c
Power meter (L
1
/N)
d
Power meter (L
1
/L
2
/L
3
/N)
e
Fuse (L
1
/N)
f
Fuse (L
1
/L
2
/L
3
/N)
g
Outdoor unit (L
1
/N)
h
Indoor unit (L
1
/L
2
/L
3
/N)
i
Backup heater (L
1
/L
2
/L
3
/N)
j
Booster heater (L
1
/N)
NOTICE
When the current control is intended to reduce the installed
field fuse sizes, the field fuse will trip to protect the field
wires in case of overcurrents caused by the unit. Make sure
the selection of the field fuse complies with applicable
legislation.
580
1 50
0
0
e
e
f
i
h
g
j
A
B
C
b
a
d
580
1 50
0
0
c
P
i
Power input
t
Time
DI
Digital input (power limitation level)
a
Power limitation active
b
Actual power input
NOTICE
Mind the following guidelines when selecting the desired
power limitation level:
Q
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.
Q
Set a minimum power consumption of ±3 kW to
guarantee space heating and DHW production by
allowing at least one electrical heater (backup heater
step 1 or booster heater).
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
t
DI
a
b
a
b
c
A
B
C
D
1
2
3
4
5
A8P
Содержание EHVH16S18CA
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