Changing The Pre-Pressure Of The Expansion Vessel; Preparing Electrical Wiring; About Preparing Electrical Wiring; Overview Of Electrical Connections Except External Actuators - Daikin Altherma EJHA04AAV3 Installer's Reference Manual

8.3.5 Changing the pre-pressure of the
expansion vessel
NOTICE
Only a licensed installer may adjust the pre-pressure of the
expansion vessel.
The expansion vessel is available with the B-pack (see
options for the gas boiler" on page 14) or as a third-party vessel. For
more information on how to change the pre-pressure, see the
manual of the expansion vessel.
Changing the pre-pressure of the expansion vessel should be done
by releasing or increasing nitrogen pressure through the Schrader
valve of the expansion vessel.
8.4

Preparing electrical wiring

8.4.1

About preparing electrical wiring

INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
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-site and all electrical
construction MUST
legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
EJHA04AAV3 + EHY2KOMB28+32AA
Daikin Altherma Hybrid hydrosplit heat pump
4P531180-1 – 2018.06
" Possible
comply with the applicable
8.4.2 Overview of electrical connections except
external actuators
0 0
58 0
1 5 0
a
2 1
3
d b
c
a Normal power supply
b Hydro part of the outdoor unit
c Refrigerant part of the outdoor unit
d Gas boiler
1 Power supply for outdoor unit
2 Power supply for gas boiler
3 In case of EHY2KOMB28+32AA gas boiler: Interconnection
cable between outdoor unit and gas boiler
In case of third-party gas boiler: Bivalent signal for third-
party gas boiler
8.4.3 Overview of electrical connections for
external and internal actuators
NOTICE
Field wiring – Temperature. Make sure that all field wiring
withstands 90°C.
In case of system with EHY2KOMB28+32AA gas boiler
The following illustration shows the required field wiring.
INFORMATION
The following illustration is an example and might NOT
match your system layout.
3
a
4
5
2
6
a Outdoor unit
b EHY2KOMB28+32AA gas boiler
Connections to outdoor unit:
Item Description
Power supply
1 Power supply for
outdoor unit
User interface
2 User interface
Optional equipment
3 Bottom plate heater
4 Outdoor ambient
temperature sensor
5 LAN adapter
Field supplied components
6 Domestic hot water
pump
8 Preparation
3
M
b
4
2
5
Wires Maximum
running
current
(a)
2+GND
(b)
2
(c)
2+GND
(d)
2
(e)
2
(d)
2+GND
Installer reference guide
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