Connections To The Indoor Unit - Daikin Altherma 3 H MT ECH2O Installer's Reference Manual

9 | Electrical installation

9.3 Connections to the indoor unit

Installer reference guide
114
Item
Power supply (main)
Power supply (backup
heater)
Backup heater
Shut-off valve
Electricity meters
Domestic hot water pump
Alarm output
Space cooling/heating
operation control
Changeover to external
heat source control
Power consumption digital
inputs
Safety thermostat
Smart Grid
WLAN cartridge
Solar input
DHW output
Room thermostat (wired or
wireless)
Description
See "9.3.2 To connect the main power
4
supply" [ 118].
See "9.3.3 To connect the backup heater power
4
supply" [ 120].
See "9.3.4 To connect the backup heater to the main
4
unit" [ 123].
See "9.3.5 To connect the shut-off
See "9.3.6 To connect the electricity
See "9.3.7 To connect the domestic hot water
4
pump" [ 126].
See "9.3.8 To connect the alarm
See "9.3.9 To connect the space cooling/heating ON/
4
OFF output" [ 128].
See "9.3.10 To connect the changeover to external
4
heat source" [ 129].
See "9.3.11 To connect the power consumption
4
digital inputs" [ 130].
See "9.3.12 To connect the safety thermostat
(normally closed contact)" [
See "9.3.13 To connect a Smart
See "9.3.14 To connect the WLAN cartridge
(delivered as accessory)" [
See "9.3.15 To connect the solar
See "9.3.16 To connect the DHW
See below table.
Wires: 0.75 mm²
Maximum running current: 100 mA
For the main zone:
▪ [2.9] Control
▪ [2.A] Thermostat type
For the additional zone:
▪ [3.A] Thermostat type
▪ [3.9] (read-only) Control
4
valve" [ 124].
4
meters" [
4
output" [ 127].
4
132].
4
Grid" [ 133].
4
138] .
4
input" [ 139].
4
output" [ 139].
EPRA08~12EAV3+W1 + ETSH/X(B)12P30+50EF
Daikin Altherma 3 H MT ECH₂O
4P663478-1 – 2021.07
125].