8 Technical data
Installation manual
23
EHBH/X04+08DA
Daikin Altherma – Low temperature split
4P495266-1 – 2017.06
8.2
Wiring diagram: Indoor unit
See the internal wiring diagram supplied with the unit (on the inside of the indoor unit upper front panel). 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
X7M, X8M
Booster 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/BSH
should be foreseen outside the
unit.
Note 1: Connection point of the
power supply for the backup
heater/booster 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
Domestic hot water tank
Domestic hot water tank
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
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
* Solar pump station PCB
A3P
* Heat pump convector
A4P
* Digital I/O PCB
A8P
* Demand PCB
A10P
MMI (= user interface connected to the
indoor unit) – Power supply unit PCB
A11P
MMI (= user interface connected to the
indoor unit) – Main PCB
A13P
* LAN adapter
A14P
* User interface used as room thermostat –
PCB
A15P
* Receiver PCB (wireless On/OFF thermostat)
BSK (A3P)
* Solar pump station relay
CN* (A4P)
* Connector
DS1(A8P)
* DIP switch
F1B
# Overcurrent fuse backup heater
F2B
# Overcurrent fuse booster heater
F1U, F2U (A4P)
* Fuse 5 A 250 V for digital I/O PCB
K1M, K2M
Contactor backup heater
K3M
* Contactor booster heater
K5M
Safety contactor backup heater
K*R (A4P)
Relay on PCB
M2P
# Domestic hot water pump
M2S
# 2-way valve for cooling mode
M3S
3-way valve for floor heating/domestic hot
water
PC (A15P)
* Power circuit
PHC1 (A4P)
* Optocoupler input circuit
Q2L
* Thermal protector booster heater
Q4L
# Safety thermostat
Q*DI
# Earth leakage circuit breaker
R1H (A2P)
* Humidity sensor
R1T (A2P)
* Ambient sensor On/OFF thermostat
R2T (A2P)
* External sensor (floor or ambient)
R6T
* External indoor or outdoor ambient
thermistor
S1S
# Preferential kWh rate power supply contact
S2S
# Electrical meter pulse input 1
S3S
# Electrical meter pulse input 2
S6S~S9S
* Digital power limitation inputs
SS1 (A4P)
* Selector switch
TR1
Power supply transformer
X6M
# Backup heater power supply terminal strip
X7M, X8M
# Booster heater power supply terminal strip
X*, X*A, X*Y, Y*
Connector
X*M
Terminal strip
*
Optional
#
Field supply
Translation of text on wiring diagram
English
Translation
(1) Main power connection
(1) Main power connection
