10 Technical data
Installation manual
35
ETBH/9W
Daikin Altherma 3 H MT W
4P634879-1 – 2021.03
10.2
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
X7M, X8M
Booster heater power supply
terminal
X10M
Smart grid 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
6T1 (3~, 230 V, 6 kW)
6T1 (3~, 230 V, 6 kW)
6V3 (1N~, 230 V, 6 kW)
6V3 (1N~, 230 V, 6 kW)
6WN/9WN (3N~, 400 V, 6/9
kW)
6WN/9WN (3N~, 400 V, 6/9
kW)
User installed options
User installed options
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
Safety thermostat
Safety thermostat
Smart Grid
Smart grid
WLAN module
WLAN module
WLAN cartridge
WLAN cartridge
Bizone mixing kit
Bizone mixing kit
Domestic hot water tank
Domestic hot water tank
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
* Heat pump convector
A4P
* Digital I/O PCB
A8P
* Demand PCB
A11P
MMI (= user interface connected to the
indoor unit) – Main PCB
A14P
* User interface PCB
A15P
* Receiver PCB (wireless On/OFF thermostat)
A20P
* WLAN module
A30P
* Bizone mixing kit PCB
BSK (A3P)
Solar pump station relay
CN* (A4P)
* Connector
DS1(A8P)
* DIP switch
F1B
# Overcurrent fuse backup heater
F2B
# Overcurrent fuse booster heater
F1T
Thermal fuse backup heater
F1U, F2U (A4P)
* Fuse 5 A 250 V for digital I/O PCB
K1A, K2A
* High voltage Smart grid relay
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 space heating/domestic hot
water
PC (A15P)
* Power circuit
PHC1 (A4P)
* Optocoupler input circuit
Q1L
Thermal protector backup 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)
R5T
Domestic hot water thermistor
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
S4S
# Smart grid feed-in
S6S~S9S
* Digital power limitation inputs
S10S-S11S
# Low voltage Smart grid contact
SS1 (A4P)
* Selector switch
TR1
Power supply transformer
X6M
# Backup heater power supply terminal strip
X6M
* Booster heater power supply connector
