Wiring Diagram: Indoor Unit - Daikin Altherma 3 R F Installation Manual

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
Notes to go through before
starting the unit
X1M
X2M
X5M
X6M
1
Note 1: Connection point of the
power supply for the BUH
should be foreseen outside the
unit.
Backup heater power supply
3V (1N~, 230 V, 3 kW)
User installed options
LAN adapter
Remote user interface
Ext. indoor thermistor
Ext outdoor thermistor
Digital I/O PCB
Demand PCB
Safety thermostat
Main LWT
On/OFF thermostat (wired)
On/OFF thermostat (wireless)
Ext. thermistor
Heat pump convector
Add LWT
On/OFF thermostat (wired)
On/OFF thermostat (wireless)
Ext. thermistor
Heat pump convector
Position in switch box
English
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
EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596818-1D – 2021.10
Translation
Notes to go through before
starting the unit
Main terminal
Field wiring terminal for AC
Field wiring terminal for DC
Backup heater power supply
terminal
Earth wiring
Field supply
Several wiring possibilities
Option
Not mounted in switch box
Wiring depending on model
PCB
Note 1: Connection point of the
power supply for the backup
heater should be foreseen outside
the unit.
Backup heater power supply
3V (1N~, 230 V, 3 kW)
User installed options
LAN adapter
Optional user interface
External indoor thermistor
External outdoor thermistor
Digital I/O PCB
Demand PCB
Safety thermostat
Main leaving water temperature
ON/OFF thermostat (wired)
ON/OFF thermostat (wireless)
External thermistor
Heat pump convector
Additional leaving water
temperature
ON/OFF thermostat (wired)
ON/OFF thermostat (wireless)
External thermistor
Heat pump convector
Translation
Position in switch box
A8P * Demand PCB
A10P Main user interface PCB
A13P * LAN adapter
A14P * Optional user interface PCB
A15P * Receiver PCB (wireless ON/OFF
thermostat)
CN* (A4P) * Connector
DS1 (A8P) * DIP switch
F1B # Overcurrent fuse backup heater
F1U, F2U (A4P) * Fuse 5 A 250 V for digital I/O PCB
K1M Contactor backup heater
K6M Relay 3-way valve bypass
K7M Relay 3-way valve flow
K*R (A4P) Relay on PCB
M2P # Domestic hot water pump
M2S # 2-way valve for cooling mode
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 (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
X*, X*A, X*Y, Y* Connector
X*M Terminal strip
* Optional
# Field supply
Translation of text on wiring diagram
English
(1) Main power connection
For preferential kWh rate power
supply
Indoor unit supplied from outdoor Indoor unit supplied from outdoor
Normal kWh rate power supply
Only for normal power supply
(standard)
Only for preferential kWh rate
power supply (outdoor)
Outdoor unit
Preferential kWh rate power
supply contact: 16 V DC
detection (voltage supplied by
PCB)
10 Technical data
Translation
(1) Main power connection
For preferential kWh rate power
supply
Normal kWh rate power supply
Only for normal power supply
(standard)
Only for preferential kWh rate
power supply (outdoor)
Outdoor unit
Preferential kWh rate power
supply contact: 16 V DC
detection (voltage supplied by
PCB)
Installation manual
31