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Technical data
Installer reference guide
278
EPRA14~18D + ETV23E
Daikin Altherma 3 H HT F
4P644738-1A – 2022.03
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)
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
X10M
* Smart Grid power supply terminal strip
X*, X*A, J*, X*H*, X*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
For HP tariff
For heat pump tariff
Indoor unit supplied from outdoor
Indoor unit supplied from outdoor
Normal kWh rate power supply
Normal kWh rate power supply
Only for normal power supply
(standard)
Only for normal power supply
(standard)
Only for preferential kWh rate power
supply (outdoor)
Only for preferential kWh rate power
supply (outdoor)
Outdoor unit
Outdoor unit
Preferential kWh rate power supply
contact: 16 V DC detection (voltage
supplied by PCB)
Preferential kWh rate power supply
contact: 16 V DC detection (voltage
supplied by PCB)
SWB
Switch box
Use normal kWh rate power supply for
indoor unit
Use normal kWh rate power supply for
indoor unit
(2) Backup heater power supply
(2) Backup heater power supply
Only for ***
Only for ***
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