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Technical data
Installer reference guide
273
ERGA04~08EA + EHBH/X04+08EF
Daikin Altherma 3 R W
4P629085-1B – 2021.11
English
Translation
WLAN cartridge
WLAN cartridge
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
Main PCB of the MMI (= user interface of the indoor
unit)
A14P
* PCB of the dedicated Human Comfort Interface
(BRC1HHDA used as room thermostat)
A15P
* Receiver PCB (wireless ON/OFF thermostat)
A20P
* WLAN module
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
K1A, K2A
* High voltage Smart Grid relay
K1M, K2M
Contactor backup heater
K3M
* Contactor booster heater
K5M
Safety contactor backup heater
K6M
Relay 3-way valve bypass
K7M
Relay 3-way valve flow
Summary of Contents for Altherma 3 R W
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