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6 Technical data
Installation and operating manual
37
Daikin Altherma EHS(X/H)(B)-D
Daikin Altherma 3 R ECH
₂
O
008.1451099_00 – 07/2020
6‒6 Key names for connection and wiring diagrams
Item
Name
Item
Name
Heat pump outdoor unit
J2
Plug connection 3UVB1
Heat pump indoor unit
J3
Plug connection AUX switching contacts and cooling
output status output
3UVB1
3‑way changeover valve (internal heat generator
circuit)
J5
Pressure sensor plug connection
3UV DHW
3‑way changeover valve (hot water/heating)
J6
Plug connection mains voltage
a
Switch box
J8
Plug connection for EXT
A1P
Printed PCB (heat pump basic control)
Plug connection for EBA
AUX
Switching contact outputs (A-A1-A2) + (B-B1)
Plug connection for Smart Grid EVU switching contacts
b
Switch box cover
Backup heater infeed temperature sensor plug
connection t
V, BH
cooling output Status output for "Cooling" operating mode
(floor heating control connection cooling output)
Plug connection for storage tank temperature sensor
t
DHW1
DS
Pressure sensor
Plug connection for HT/NT EVU switching contact
EBA
Switching contact for external requirement request
J10
Plug connection for internal wiring to X1A
EHS157034
Room station
J11
Plug connection for internal wiring to X18A (A1P)
EHS157068
Mixer module
J12
Plug connection 3UV DHW
EKBUxx
Backup heater
J13
System bus plug connection (e.g. room station)
EXT
Switching contact for external operating mode
changeover
J14
Circulation pump P
Z
plug connection
F1
Fuse 250 V T 2 A (RoCon BM2C)
J15
Mains switch plug connection
FLS
FlowSensor
J16
Room thermostat (EKRTR/EKRTW) plug connection
HT/NT
Switching contact for low rate mains connection
K1
Relay 1 for backup heater
P
Heating circulation pump (connected inside the device) K2
Relay 2 for backup heater
P
Z
Circulation pump
K3
Relay 3 for backup heater
PWM
Pump connection (PWM signal)
X1
Terminal strip for backup heater mains connection
RJ45 CAN
Internal wiring plug connection (RoCon BM2C) (to
RoCon+ B1)
X3
Internal wiring plug connection to J17 (RoCon BM2C)
RoCon BM2C Printed PCB (basic controller module)
X1A
Plug connection to J10 from RoCon BM2C
RoCon+ B1
Controller control panel
X3A
Plug connection for internal wiring (bridging plug)
RT
Room thermostat (EKRTW)
X4A
Plug connection for FLS flow sensor and t
DHW2
RT-E
Receiver for wireless room thermostat (EKRTR)
X5A
Plug connection for t
V
flow temperature sensor
RTX-EHS
Printed PCB (backup heater)
X7A
Plug connection for temperature sensor (refrigerant
fluid) t
DC
SG
Switching contact for Smart Grid (intelligent mains
connection)
X8A
Plug connection for return temperature sensor t
R
T
A
Outdoor temperature sensor
X16A
Plug connection for heating circulation pump
TRA1
Transformer
X18A
Plug connection to J11 from RoCon BM2C
t
DHW1
Storage tank temperature sensor 1 (RoCon BM2C)
X19A
Plug connection to XAG1
t
DHW2
Storage tank temperature sensor 2 (A1P)
X21A
Plug connection for internal wiring (bridging plug)
t
R
Return temperature sensor (A1P)
X22A
Plug connection for XTA1
t
V
Flow temperature sensor (A1P)
X26A
Plug connection to TRA1 (230 V)
t
V, BH
Backup heater flow temperature sensor
X31A
Plug connection to TRA1 (12 V)
X2M6
HPc-VK-1 connection cable clamp
X2M7
HPc-VK-1 connection cable clamp
X11M
Terminal strip in FWXV-ATV3
XAG1
Heat pump outdoor unit plug connection
XBUH1
Backup heater plug connection (EKBUxx)
XAG1
Heat pump outdoor unit plug connection
XTA1
Outdoor temperature sensor terminal strip T
A
Summary of Contents for Altherma 3 R ECH2O
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