6 Preparation
Installer reference guide
30
EKCB
EK2CB EKMBU EKMBUHCA9W1
Daikin Altherma low temperature monobloc
4P405544-1 – 2015.03
7
Normal kWh rate power supply (to power the hydro part of
the outdoor unit in the event of a power supply interruption
of the preferential kWh rate power supply)
6.4.3
Overview of electrical connections for
external and internal actuators
The following illustration shows the required field wiring.
INFORMATION
The following illustration is an example and might NOT
match your system layout.
M
M
a
1
2
12
5
20
17
13
14
21
16
18
15
26
19
11
9 10 7 8
3
4
27
29
28
25
24
23
22
6
c
d
b
f
e
a
Backup heater power supply
b
Backup heater kit
c
Outdoor unit
d
Control box
e
Option box
f
Domestic hot water tank
Outdoor unit
Item
Description
Wires
Maximum
running
current
Power supply
1
Power supply for
outdoor unit
2+GND
(a)
2
Normal kWh rate power
supply
2
6.3 A
User interface
3
User interface
2
(b)
Optional equipment
4
Remote outdoor sensor 2
(c)
Field-supplied components
5
Space heating/cooling
operation control (or
shut‑off valve)
2
(c)
(a)
Refer to name plate on outdoor unit.
(b)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
500 m. Applicable for both single user interface and dual
user interface connection.
(c)
Minimum cable section 0.75 mm².
Control box
Item
Description
Wires
Maximum
running
current
Power supply
6
Power supply for
control box
2+GND
(a)
Item
Description
Wires
Maximum
running
current
Interconnection cable
7
Interconnection cable
between outdoor unit
and control box
2
(b)
8
Interconnection cable
for the user interface
(between outdoor unit
and control box)
2
(c)
9
Interconnection cable
for the domestic hot
water pump (between
outdoor unit and control
box)
2
(d)
10
Interconnection cable
for the space heating/
cooling operation
control (or shut‑off
valve) (between
outdoor unit and control
box)
2
(d)
User interface
11
User interface
2
(c)
Optional equipment
12
Preferential kWh rate
power supply (voltage-
free contact)
2
(e)
13
Domestic hot water
pump
2
(d)
14
Space heating/cooling
operation control (or
shut‑off valve)
2
(d)
15
3‑way valve
3
(f)
16
Power supply for
booster heater and
thermal protection
(from control box)
4+GND
(a)
17
Power supply for
booster heater (to
control box)
2+GND
13 A
18
Domestic hot water
tank thermistor
2
(f)
19
Room thermostat/heat
pump convector
3 or 4
100 mA
(g)
20
Valve kit
3
(f)
(a)
Cable section 2.5 mm².
(b)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
20 m.
(c)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
500 m. Applicable for both single user interface and dual
user interface connection.
(d)
Minimum cable section 0.75 mm².
(e)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
50 m. Voltage-free contact shall ensure the minimum
applicable load of 15 V DC, 10 mA.
(f)
The thermistor and connection wire (12 m) are delivered
with the domestic hot water tank.
(g)
Minimum cable section 0.75 mm²; maximum length: 10 m.
Backup heater kit
Item
Description
Wires
Maximum
running
current
Interconnection cable
Summary of Contents for EK2CB07CAV3
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