Daikin EHYKOMB33AA3 [21/108] Overview of electrical connections except external actuators
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Daikin EHYKOMB33AA3 [21/108] Overview of electrical connections except external actuators

Daikin EHYKOMB33AA3 [21/108] Overview of electrical connections except external actuators
6 Preparation
Installer reference guide
21
CHYHBH05+08AA + EHYKOMB33A
Daikin hybrid for multi heat pump – heat pump module
4P471761-1A – 2017.10
WARNING
▪ If the power supply has a missing or wrong N-phase,
equipment might break down.
▪ Establish proper earthing. Do NOT earth the unit to a
utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shock.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the
cables do NOT come in contact with sharp edges or
piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, stranded conductor wires,
extension cords, or connections from a star system.
They can cause overheating, electrical shock or fire.
▪ Do NOT install a phase advancing capacitor, because
this unit is equipped with an inverter. A phase
advancing capacitor will reduce performance and may
cause accidents.
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on the site and all electrical
construction MUST comply with the applicable
legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
6.5.2 Overview of electrical connections except
external actuators
Power supply
1
5
8
0
1
5
0
0
0
2
a
3
a Power supply
1 Power supply for outdoor unit
2 Power supply and interconnection cable to indoor unit
3 Power supply for gas boiler
6.5.3 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
4
7
8
9
10
14
15
11
2
5
6
12
c
a
d
b
13
3
1
a Outdoor unit
b Indoor unit
c Gas boiler
d Domestic hot water tank
Item Description Wires Maximum
running
current
Outdoor unit and indoor unit power supply
1 Power supply for
outdoor unit
2+GND
(a)
2 Power supply and
interconnection cable to
indoor unit
3+GND
(g)
3 Power supply gas
boiler
2+GND
(c)
User interface
4 User interface 2
(f)
Optional equipment
5 3‑way valve 3 100mA
(b)
6 Domestic hot water
tank thermistor
2
(d)
7 Room thermostat/heat
pump convector
3 or 4 100mA
(b)
8 Outdoor ambient
temperature sensor
2
(b)
9 Indoor ambient
temperature sensor
2
(b)
Field supplied components
10 Shut-off valve 2 100mA
(b)
11 Domestic hot water
pump
2
(b)
12 Alarm output 2
(b)
13 Changeover to external
heat source control
2
(b)
14 Space heat operation
control
2
(b)
15 Safety thermostat 2
(e)
(a) Refer to name plate on outdoor unit.
(b) Minimum cable section 0.75mm².
(c) Use the cable supplied with the boiler.
(d) The thermistor and connection wire (12m) are delivered
with the domestic hot water tank.
(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) Cable section 0.75mm² till 1.25mm²; maximum length:
500m. Applicable for both single user interface and dual
user interface connection.
(g) Cable section 1.5mm
2
; maximum length: 50m.

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