8 Technical data
Installation manual
28
08S18+23DA + 08S18+23DJ
Daikin Altherma 3 R F
4P584429-1 – 2019.06
8.2
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
3~, 230 V
3~, 230 V
3N~, 400 V
3N~, 400 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)
On/OFF thermostat (wireless)
On/OFF thermostat (wireless)
Ext. thermistor
External thermistor
Heat pump convector
Heat pump convector
Position in switch box
English
Translation
Position in switch box
Position in switch box
Legend
A1P
Main PCB
A2P
* On/OFF thermostat (PC=power circuit)
A3P
* Heat pump convector
A4P
* Digital I/O PCB
A5P
Bizone PCB
A6P
Current loop PCB
A8P
* Demand PCB
A9P
Status indicator
A10P
MMI (= user interface connected to the
indoor unit) – Power supply unit PCB
A11P
MMI (= user interface connected to the
indoor unit) – Main PCB
A12P
MMI display PCB
A13P
* LAN adapter
A14P
* User interface used as room thermostat –
PCB
A15P
* Receiver PCB (wireless On/OFF thermostat)
B1L
Flow sensor
B1PR
Refrigerant pressure sensor
B1PW
Water pressure sensor
CN* (A4P)
* Connector
DS1 (A5P)
DIP switch
DS1(A8P)
* DIP switch
E1A
Electrical anode
E1H
Backup heater element (1 kW)
E2H
Backup heater element (2 kW)
E*P (A9P)
Indication LED
F1B
# Overcurrent fuse backup heater
F1T
Thermal fuse backup heater
F1U, F2U (A4P)
* Fuse 5 A 250 V for digital I/O PCB
F1U, F2U (A5P)
Fuse T 2 A 250 V for PCB
FU1 (A1P)
Fuse T 5 A 250 V for PCB
FU2 (A10P)
Fuse T 1.6 A 250 V for PCB
K1M, K2M
Contactor backup heater
K5M
Safety contactor backup heater
K6M
Relay 3-way valve bypass
K7M
Relay 3-way valve flow
K*R (A4P)
Relay on PCB
M1P
Main supply pump
M1S
Mixing 3-way valve
M2P
# Domestic hot water pump
M2S
# 2-way valve for cooling mode
M3P
Main zone pump
M3S
3-way valve for space heating/domestic hot
water
P1M
MMI display
PC (A15P)
* Power circuit
PHC1 (A4P)
* Optocoupler input circuit
Q1L
Thermal protector backup heater
Q3L, Q4L
# Safety thermostat
Q*DI
# Earth leakage circuit breaker
R1H (A2P)
* Humidity sensor
R1T (A1P )
Outlet water heat exchanger thermistor
R1T (A2P)
* Ambient sensor On/OFF thermostat
R1T (A14P)
* Ambient sensor user interface
R2T (A1P)
Outlet backup heater thermistor
