Daikin Altherma 3 H HT ECH20, Installation Manual

Page: 14 / 44

6 Electrical installation
Installation manual
14
ETSH/X(B)16P30+50EF
Daikin Altherma 3 H HT ECH ₂ O
4P679468-1 – 2022.02
b
a
a
c
b
a Drainback connection
b Spillover connection
c Hose with non-return valve (1/2")
With installed drainback solar kit (option)
1 Combine the fill and drain kit (option) with the drainback solar
kit (option) to fill the storage tank.
2 Connect the hose with non-return valve to the fill and drain kit.
Follow the steps described in the previous chapter.
5.2.7 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.
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 "6.3.3 To connect the backup heater power supply" [
4
17].
6.2 Guidelines when connecting the
electrical wiring
Tightening torques
Indoor unit:
Item Tightening torque (N•m)
M4 (X1M) 1.2
M4 (X12M, X15M) 0.88 ±10%
Indoor unit – BUH option:
Item Tightening torque (N•m)
M4 (X6M) *3V, *6V 2.45 ±10%
M4 (X6M) *9W 1.2
6.3 Connections to the indoor unit
Item Description
Power supply (main) See "6.3.2 To connect the main power
supply" [
4
16].
Power supply (backup
heater) See "6.3.3 To connect the backup heater
power supply" [
4
17].
Backup heater See "6.3.4 To connect the backup heater to
the main unit" [
4
19].
Shut-off valve See "6.3.5 To connect the shut-off
valve" [
4
19].
Electricity meters See "6.3.6 To connect the electricity
meters" [
4
20].
Domestic hot water
pump See "6.3.7 To connect the domestic hot
water pump" [ 4 20].
Alarm output See "6.3.8 To connect the alarm
output" [
4
21].
Space cooling/heating
operation control See "6.3.9 To connect the space cooling/
heating ON/OFF output" [
4
21].
Changeover to
external heat source
control See "6.3.10 To connect the changeover to
external heat source" [
4
22].
Power consumption
digital inputs See "6.3.11 To connect the power
consumption digital inputs" [
4
22].
Safety thermostat See "6.3.12 To connect the safety
thermostat (normally closed
contact)"
[
4
23].
Smart Grid See "6.3.13 To connect a Smart
Grid" [
4
24].