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4 Installation
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
See
"4.5.4 To connect the backup heater power supply" on
page 9.
4.5.2
To connect the electrical wiring on the
indoor unit
1 To open the indoor unit, see
page 5
and
"4.1.2 To open the switch box cover of the indoor
unit" on
page 6.
2 Wiring should enter the unit from the top:
a
3 Routing of the wiring inside the unit should be as follows:
b+c
a
4 Fix the cable with cable ties to the cable tie mountings to
ensure strain relief and to make sure that it does NOT come in
contact with the piping and sharp edges.
Installation manual
8
"4.1.1 To open the indoor unit" on
b+c
INFORMATION
To access the domestic hot water temperature sensor, the
switch box can be tilted. The switch box should NOT be
removed from the unit.
Routing
Possible cables (depending on unit type
and installed options)
a
▪ Preferential power supply contact
Low voltage
▪ User interface
▪ Power consumption digital inputs (field
supply)
▪ Outdoor
(option)
▪ Indoor
(option)
▪ Electrical meters (field supply)
▪ Safety thermostat for the main zone (field
supply)
▪ Safety thermostat for the additional zone
(field supply)
b
▪ Interconnection cable
High voltage power
▪ Normal kWh rate power supply
supply
▪ Preferential kWh rate power supply
▪ Power supply for backup heater
▪ Power supply for bottom plate heater
(option)
c
▪ Heat pump convector (option)
High voltage control
▪ Room thermostat (option)
signal
▪ Shut-off valve (field supply)
▪ Domestic hot water pump (field supply)
▪ Alarm output
▪ Changeover to external heat source
control
▪ Space heating operation control
CAUTION
Do NOT push or place redundant cable length in the unit.
4.5.3
To connect the main power supply
1 Connect the main power supply.
In case of normal kWh rate power supply
X5M
A5P
ambient
temperature
sensor
ambient
temperature
sensor
X1A
X19A
X6YB
X2M
30 31
X6Y
X6YA
X6YA
K3M
K2M
X1M
a
1 2 3
1 2 3
EHVZ04~16S18CB3V
Daikin Altherma – Low temperature split
4P401672-1E – 2018.02
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