3 Preparation
Installation manual
4
EKCB07CAV3
Daikin Altherma low temperature monobloc control box
4P4040751 – 2015.03
3
Preparation
3.1
Preparing installation site
3.1.1
Installation site requirements of the
control box
▪ Mind the measurement guidelines:
Maximum distance between control box and
outdoor unit
20 m
Maximum distance between control box and backup
heater kit
10 m
Maximum distance between control box and
domestic hot water tank
10 m
▪ Mind the following spacing installation guidelines:
100
50
50
600
50
50
(mm)
▪ The control box is designed to be wallmounted in indoor locations
only. Make sure the installation surface is a flat and vertical non
combustible wall.
▪ The control box is designed to operate in ambient temperatures
ranging from 5~35°C.
3.2
Preparing electrical wiring
3.2.1
Overview of electrical connections for
external and internal actuators
Item
Description
Wires
Maximum
running
current
Power supply
1
Power supply for
control box
2+GND
(a)
Interconnection cable
2
Interconnection cable
between outdoor unit
and control box
2
(b)
User interface
3
User interface
2
100 mA
(c)
Optional equipment
4
Preferential kWh rate
power supply (voltage
free contact)
2
(d)
5
Backup heater kit
thermistor
2
(e)
6
Backup heater kit
thermal protector
2
(e)
7
Backup heater kit
connection (from
control box)
2 (3V3)
3 (6V3, 6W1,
9W1)
(e)
Item
Description
Wires
Maximum
running
current
8
3way valve
3
(f)
9
Power supply for
booster heater and
thermal protection
(from control box)
4+GND
(a)
10
Power supply for
booster heater (to
control box)
2+GND
13 A
11
Domestic hot water
tank thermistor
2
(f)
12
Room thermostat
3 or 4
100 mA
(e)
(a)
Cable section 2.5 mm².
(b)
Minimum cable section 0.75 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
use interface connection.
(d)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
50 m. Voltagefree contact shall ensure the minimum
applicable load of 15 V DC, 10 mA.
(e)
Minimum cable section 0.75 mm²; maximum length: 10 m.
(f)
The thermistor and connection wire (12 m) are delivered
with the domestic hot water tank.
NOTICE
More technical specifications of the different connections
are indicated on the inside of the control box.
4
Installation
4.1
Opening the units
4.1.1
To open the control box
1
1
2
2×
WARNING
The screws are delivered with toothed lock washers.
ALWAYS use toothed lock washers, also when the screws
need to be replaced. Failure to follow this warning may
result in electric shock.
