4 Installation
Installation manual
12
08S18+23DA + 08S18+23DJ
Daikin Altherma 3 R F
4P584429-1 – 2019.06
INFORMATION
Make sure both air purge valves (one on the magnetic filter
and one on the backup heater) are open.
4.4.4
To fill the domestic hot water tank
1
Open every hot water tap in turn to purge air from the system
pipe work.
2
Open the cold water supply valve.
3
Close all water taps after all air is purged.
4
Check for water leaks.
5
Manually operate the field-installed pressure relief valve to
ensure a free water flow through the discharge pipe.
4.4.5
To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent condensation during defrost operation and reduction of the
heating capacity.
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
4.5
Connecting the electrical wiring
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
4.5.1
About electrical compliance
Only for the backup heater of the indoor unit
See
"4.5.4 To connect the backup heater power supply" on
.
4.5.2
To connect the electrical wiring on the
indoor unit
1
To open the indoor unit, see
"4.1.1 To open the indoor unit" on
"4.1.2 To open the switch box cover of the indoor
2
The wiring enters the unit from the top:
b+c
a
d
a, b, c
Field wiring (see table below)
d
Factory-mounted cable for power supply of backup heater
3
Routing of the wiring inside the unit should be as follows. Fix
the cable to the cable rail using cable ties:
a
4×
b+c
WARNING
Make sure that the electrical wiring does NOT touch the
refrigerant gas pipe, which can be very hot.
a
a
Refrigerant gas pipe
Routing
Possible cables (depending on unit type
and installed options)
a
Low voltage
▪ Preferential power supply contact
▪ User interface used as room thermostat
(option)
▪ Power consumption digital inputs (field
supply)
▪ Outdoor ambient temperature sensor
(option)
▪ Indoor
ambient
temperature
sensor
(option)
▪ Electrical meters (field supply)
▪ Safety thermostat (field supply)
b
High voltage power
supply
▪ Interconnection cable
▪ Normal kWh rate power supply
▪ Preferential kWh rate power supply
c
High voltage control
signal
▪ Heat pump convector (option)
▪ Room thermostat (option)
▪ Shut-off valve (field supply)
▪ Domestic hot water pump (field supply)
▪ Alarm output
▪ Changeover to external heat source
control
▪ Space heating operation control
d
High voltage power
supply (factory-
mounted cable)
▪ Power supply for backup heater
CAUTION
Do NOT push or place redundant cable length in the unit.
4
Seal the low voltage wiring intake using the sealing tape
(delivered as accessory).
