Daikin Altherma 3 R W EHB Series, Installation Manual

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8 Technical data
Installation manual
25
EHBH/X04+08DA
Daikin Altherma 3 R W
4P495266-1D – 2019.10
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 * Heat pump convector
A4P * Digital I/O 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
BSK (A3P) Solar pump station relay
CN* (A4P) * Connector
DS1(A8P) * DIP switch
E1H Backup heater element (1 kW)
E2H Backup heater element (2 kW)
E3H Backup heater element (3 kW)
E4H * Booster heater (3 kW)
E*P (A9P) Indication LED
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
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
K3M * Contactor booster heater
K5M Safety contactor backup heater
K*R (A1P-A4P) Relay on PCB
M1P Main supply pump
M2P # Domestic hot water pump
M2S # 2-way valve for cooling mode
M3S * 3-way valve for floor heating/domestic hot
water
P1M MMI display
PC (A15P) * Power circuit
PHC1 (A4P) * Optocoupler input circuit
Q1L Thermal protector backup heater
Q2L * Thermal protector booster heater
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
R2T (A2P) * External sensor (floor or ambient)