5 Application guidelines
Installer reference guide
19
ERGA04~08DAV3(A) + EHVH/X04+08S18+23DA
Daikin Altherma – Low temperature split
4P495248-1 – 2017.12
Exception
▪ You can use a second power meter if:
▪ The power range of one meter is insufficient.
▪ The electrical meter cannot easily be installed in the electrical
cabinet.
▪ 230 V and 400 V three-phase grids are combined (very
uncommon), because of technical limitations of power meters.
▪ Connection and setup:
▪ Connect the second power meter to X5M/3 and X5M/4.
▪ In the software the power consumption data of both meters is
added so you do NOT have to set which meter covers which
power consumption. You only need to set the number of pulses
of each power meter.
▪ See
"5.5.4 Preferential kWh rate power supply" on page 19
for
an example with two power meters.
5.5.4
Preferential kWh rate power supply
General rule
▪ Power meter 1: Measures the outdoor unit.
▪ Power meter 2: Measures the rest (i.e. indoor unit and backup
heater).
Setup
▪ Connect power meter 1 to X5M/5 and X5M/6.
▪ Connect power meter 2 to X5M/3 and X5M/4.
Power meter types
▪ Power meter 1: Single- or three-phase power meter according to
the power supply of the outdoor unit.
▪ 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:
e
f
e
i
h
g
A
B
b
a
d
c
580
1 50
0
0
580
1 50
0
0
A
Outdoor unit
B
Indoor unit
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
/N)
i
Backup heater (L
1
/L
2
/L
3
/N)
5.6
Setting up the power consumption
control
▪ The power consumption control:
▪ Allows you to limit the power consumption of the entire system
(sum of outdoor unit, indoor unit 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.
P
i
t
DI
a
b
P
i
Power input
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 [9.9] via the user
interface
(for
the
description
of
all
settings,
see
"8 Configuration" on page 47
):
▪ Select continuous 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 the
backup heater step 1.
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)
Final English - Tanslations in progress
