Daikin ETVX16E9W7, Installation Manual

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6 Electrical installation
Installation manual
11
ETVH/23E
Daikin Altherma 3 H HT F
4P644728-1B – 2022.03
▪ Normally closed valves (located indoors near the piping entry/exit
points) can prevent that all water from indoor piping is drained
when the freeze protection valves open.
NOTICE
When freeze protection valves are installed, set the
minimum cooling setpoint (default=7°C) at least 2°C higher
than the maximum opening temperature of the freeze
protection valve. If lower, freeze protection valves can
open during cooling operation.
For more information, see the installer reference guide.
5.2.5 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.
5.2.6 To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling capacity.
Outdoor water piping insulation
See the installation manual of the outdoor unit, or the installer
reference guide.
6 Electrical installation
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
CAUTION
Do NOT push or place redundant cable length in the unit.
NOTICE
The distance between the high voltage and low voltage
cables should be at least 50 mm.
6.1 About electrical compliance
Only for the backup heater of the indoor unit
See "6.3.2 To connect the backup heater power supply" [
4
13].
6.2 Guidelines when connecting the
electrical wiring
Tightening torques
Indoor unit:
Item Tightening torque (N•m)
X1M 2.45 ±10%
X2M 0.88 ±10%
X5M 0.88 ±10%
Item Tightening torque (N•m)
X6M 2.45 ±10%
X10M 0.88 ±10%
M4 (earth) 1.47 ±10%
6.3 Connections to the indoor unit
Item Description
Power supply (main) See "6.3.1 To connect the main power
supply" [ 4 12].
Power supply (backup
heater) See "6.3.2 To connect the backup heater
power supply" [
4
13].
Shut-off valve See "6.3.3 To connect the shut-off
valve" [
4
15].
Electricity meters See "6.3.4 To connect the electricity
meters" [
4
15].
Domestic hot water
pump See "6.3.5 To connect the domestic hot
water pump" [
4
15].
Alarm output See "6.3.6 To connect the alarm
output" [
4
16].
Space cooling/heating
operation control See "6.3.7 To connect the space cooling/
heating ON/OFF output" [
4
16].
Changeover to
external heat source
control See "6.3.8 To connect the changeover to
external heat source" [
4
17].
Power consumption
digital inputs See "6.3.9 To connect the power
consumption digital inputs" [
4
17].
Safety thermostat See "6.3.10 To connect the safety
thermostat (normally closed
contact)"
[ 4 18].
Smart Grid See "6.3.11 To connect a Smart
Grid" [
4
18].
WLAN cartridge See "6.3.12 To connect the WLAN
cartridge (delivered as accessory)" [
4
20].
Room thermostat
(wired or wireless) See below table.
Wires: 0.75 mm²
Maximum running current: 100 mA
For the main zone:
▪ [2.9] Control
▪ [2.A]
Ext thermostat type
For the additional zone:
▪ [3.A] Ext thermostat type
▪ [3.9] (read-only) Control