5 Application guidelines
Installer reference guide
22
EKCB
EK2CB EKMBU EKMBUHCA9W1
Daikin Altherma low temperature monobloc
4P405544-1 – 2015.03
▪ See
"5.5.4 Preferential kWh rate power supply" on page 22
for
an example with two power meters.
5.5.4
Preferential kWh rate power supply
General rule
▪ Power meter 1: Measures the refrigerant part of the outdoor unit.
▪ Power meter 2: Measures the rest (i.e. the hydro part of the
outdoor
unit,
control
box
EKCB07CAV3,
option
box
EK2CB07CAV3, the backup heater kit, and the optional booster
heater).
Setup
▪ Connect power meter 1 to X2M/7 and X2M/8 of option box
EK2CB07CAV3.
▪ Connect power meter 2 to X2M/9 and X2M/10 of option box
EK2CB07CAV3.
Power meter types
▪ Power meter 1: Single-phase power meter.
▪ 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
Three-phase backup heater:
e
f
e
h
g
k
A
E
b
a
d
i
C
B
j
D
c
580
1 50
0
0
580
1 50
0
0
A
Outdoor unit
B
Control box
C
Domestic hot water tank
D
Option box
E
Backup heater kit
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
Control box (L
1
/N)
i
Booster heater (L
1
/N)
j
Option box (L
1
/N)
k
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 the outdoor unit, control box EKCB07CAV3, option box
EK2CB07CAV3, the backup heater kit, and the optional booster
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 [A.6.3.1] via the
user interface (for the description of all settings, see
"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
Mind the following guidelines when selecting the desired
power limitation level:
▪ 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.
▪ 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).
5.6.2
Power limitation activated by digital
inputs
Power limitation is also useful in combination with an energy
management system.
Summary of Contents for EK2CB07CAV3
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