Daikin ERLA03DAV3, Installer'S Reference Manual, Page: 175 / 192

15 | Technical data
Installer reference guide
175
ERLA EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1A – 2020.05
15.4 Wiring diagram: Indoor unit
See the internal wiring diagram supplied with the unit (on the inside of the indoor unit switch box cover). The
abbreviations used are listed below.
Notes to go through before starting the unit
English Translation
Notes to go through before starting
the unit Notes to go through before starting the
unit
X1M Main terminal
X2M Field wiring terminal for AC
X5M Field wiring terminal for DC
X6M Backup heater power supply terminal
Earth wiring
Field supply
1
Several wiring possibilities
Option
Not mounted in switch box
Wiring depending on model
PCB
Note 1: Connection point of the power
supply for the BUH should be foreseen
outside the unit. Note 1: Connection point of the power
supply for the backup heater should be
foreseen outside the unit.
Backup heater power supply Backup heater power supply
1N~, 230 V 1N~, 230 V
User installed options User installed options
LAN adapter LAN adapter
Remote user interface User interface used as room
thermostat
Ext. indoor thermistor External indoor thermistor
Ext outdoor thermistor External outdoor thermistor
Digital I/O PCB Digital I/O PCB
Demand PCB Demand PCB
Main LWT Main leaving water temperature
On/OFF thermostat (wired) On/OFF thermostat (wired)
On/OFF thermostat (wireless) On/OFF thermostat (wireless)
Ext. thermistor External thermistor
Heat pump convector Heat pump convector
Safety thermostat Safety thermostat
Add LWT Additional leaving water temperature
On/OFF thermostat (wired) On/OFF thermostat (wired)