Daikin EKCBX-BBV3 - Инструкция по эксплуатации - Страница 20

Installation manual

18

EKCBX/H008BBV3

Unit for air to water heat pump system

4PW66983-1C – 08.2011

11.8. Requirements for indoor unit field wiring

Selection and sizing should be done in accordance with the
applicable legislation based on the information in the table below:

11.9. Routing

The indoor unit has several openings on the bottom side for field
wiring.  Use the appropriate opening to route the high voltage, low
voltage and power supply wires as shown in the figure below.

11.10.Indoor switch box connections

Connection of control signals and thermistor cable

1

Indoor unit control signals

2

Indoor unit pump and heater control signals

3

Thermistor interconnection cable

4

In case no EKHW* option with booster heater is 
installed, connect an extra ground wire to the 
ground terminal.

5

Normal kWh rate power supply 

1

Remove the control box cover.

2

Using the appropriate cables, route and connect the control
cables to the appropriate terminals as shown on the wiring
diagram supplied with the unit and according to the figure above.

3

Route and connect the thermistor interconnection cable as
shown in the figure above.

Be sure not to force the connectors. The connectors lock in one
position only.  Check both connector sides for correct matching.

4

Route the cables through the cable holders and secure the
cables to the cable tie mountings with cable ties as shown in the
figure above.

5

Close the control box cover. Take care not to pinch any wires.

Connection heater kit signals (if applicable)

Refer to the installation manual of the EKMBUH heater kit.

Item

Cable 

bundle

(a)

(a) PS = Power supply

HV = High voltage
LV = Low voltage

Desciption

Required 

number of 

conductors

Maximum 

running 

current

1

HV

Indoor unit control signals

3 + GND

Minimum 

cable section

2.5 mm

2

2

HV

Indoor unit pump and 
heater control signals

4

1.25 A

(b)

(b) Minimum cable section = 0.75 mm

2

3

LV

Thermistor 
interconnection cable 
(supplied with unit)

8

Supplied with 

the unit

4

HV

Heater kit control signals 
(only for EKMBUH)

5

(b)

5

LV

Heater kit R12T 
thermistor (only for 
EKMBUH)

2

(b)

6

HV

Alarm output (only for 
EKRP1HB* and 
EKSOLHWAV1 option)

2

(b)

7

HV

Cooling/heating on/off 
output (only for 
EKRP1HB* and 
EKSOLHWAV1 option)

2

(b)

8

HV

Solar input (only for 
EKRP1HB*and 
EKSOLHWAV1 option)

2

(b)

9

LV

Changeover to boiler 
output (only for 
EKRP1HB* and 
EKSOLHWAV1 option)

2

(b)

10

HV

2-way valve (only for 
EKCBX* units)

2

(b)

11

HV

Room thermostat (only for 
EKRTW, EKRTR1 or 
EKRTETS option)

1, 3, 4 or 5

(b)

12

LV

user interface mounted on 
indoor unit front panel

–

(b)

LV

user interface mounted 
apart from indoor unit

2

(c)

(c) Cable section 0.75 mm

2

 till 1.25 mm

2

, maximum length: 50 m

13

HV

3-way valve (only for 
EKHW option)

3

(b)

14

HV

Solar pump and thermal 
protector (only for 
EKSOLHWAV1 option)

2

(b)

15

LV

R5T Tank thermistor (only 
for EKHW option)

2

16

HV

Booster heater power 
supply and thermal 
protector (only for EKHW 
option)

4 + GND

(d)

(d) Refer to the nameplate of the domestic hot water tank

17

HV

Domestic hot water tank 
thermal protector (only for 
EKHWSU option)

2

(b)

18

PS

Booster heater power 
supply (only for EKHW 
option)

2 + GND

(d)

19

PS

Normal kWh rate power 
supply

2 + GND

(e)

(e) Cable section = 2.5 mm

2

WARNING

It is important to keep the high voltage, low voltage and
power supply wiring separated from each other.  In order to
avoid any electrical interference the distance between both
wiring should always be at least 25 mm.

PS/HV

HV

LV

PS

Power supply

HV

High voltage

LV

Low voltage

X4M

X14M

SS2

1

2

4 5

F2B

X3M

FU1

X13A

X9A

X

15M

X2M

FU2

3