Filling The System On The Water Side; Checking The Water Quality And Adjusting The Pressure Gauge; Filling The Hot Water Heat Exchanger; Filling The Storage Tank - Daikin Altherma M ECH2O Series Installation And Maintenance Instructions Manual

Key names
Short desig-
nation
EBLQ Heat pump outdoor unit
Indoor unit
EKHWMX
3-way switch valve (internal heat generator cir-
3UVB1
cuit)
3UV DHW 3-way switch valve (hot water / heating)
A-A1- Switchover output: Function, see control system
A2 manual, parameter [AUX Fct]
AUX
Switching contact output for status of operating
B-B1 mode "Cooling" or as a switchover contact (heat-
ing/cooling), e.g. for a floor heating controller
EKBUxx Backup heater
Switching contact for external requirement
EBA
request
Switching contact for external operating mode
EXT
switchover
F1 Fuse 250 V T 2 A (RoCon BM2C)
FU1 Fuse 250 V T 3.15 A (A1P in the outdoor unit)
Connecting cable between Altherma M ECH
HPc-VK-1
(with cooling function) and FWXV-ATV3
HT/NT Switching contact for off-peak mains connection
P Pressure sensor
hyd
P Circulation pump
Z
Internal wiring plug connection (RoCon BM2C)
RJ45 CAN
(to RoCon B1)
RoCon B1 Controller control panel
RoCon BM2C Printed circuit board (basic controller module)
J1 Not assigned
J2 Plug connection 3UVB1
J3 AUX switching contact plug connection
J4 Plug connection - not assigned
J5 Pressure sensor plug connection
J6 Plug connection mains voltage
J7 Not assigned
Plug connection EXT
Plug connection EBA
Smart Grid plug connection EVU switching con-
tact
J8
Plug connection t
Storage tank temperature sensor t
nection
HT/NT plug connection EVU switching contact
J9 Not assigned
J10 Not assigned
J11 Internal wiring plug connection to XAG1
J12 Plug connection 3UV DHW
J13 System bus plug connection (e.g. room station)
J14 Circulation pump P
J15 Internal wiring plug connection (bridging plug)
Room thermostat (EKRTR / EKRTW) plug con-
J16
nection
EHS157068 Mixer module
EHS157034 Room station
RT Room thermostat (EKRTW)
Daikin Altherma M ECH O
2
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
Explanation
O
2
V, BH
plug con-
DHW
plug connection
Z
4 x Set-up and installation
Key names
Short desig-
nation
RT-E Receiver for wireless room thermostat (EKRTR)
RTX-EHS Printed circuit board (backup heater)
K1 Relay 1 for backup heater
K2 Relay 2 for backup heater
K3 Relay 3 for backup heater
Terminal strip for backup heater mains connec-
X1
tion
Internal wiring plug connection to J17
X3
(RoCon BM2C)
Switching contact for Smart Grid (intelligent
SG
mains connection)
Storage tank temperature sensor 1
t
DHW
(RoCon BM2C)
Backup heater feed temperature sensor
t
V, BH
(RoCon BM2C)
XAG1 Heat pump outdoor unit plug connection
XBUH1 Backup heater plug connection (EKBUxx)
X2M6 Connecting cable terminal HPc-VK-1
X2M7 Connecting cable terminal HPc-VK-1
X11M Terminal strip in FWXV-ATV3
Tab. 4-3 Key names for connection and wiring diagrams

4.6 Filling the system on the water side

Fill the Daikin Altherma M ECH
installation work in the order shown below.
4.6.1 Checking the water quality and adjusting the
pressure gauge
● Observe the notes on the water connection and water quality
according to chap. 4.4.
The correct minimum pressure mark must be set on the pressure
gauge installed in the building before initially filling the system:
● Rotate the pressure gauge glass so that the minimum
pressure mark corresponds to the system height +2 m
(1 m water column = 0.1 bar).

4.6.2 Filling the hot water heat exchanger

● Open the shutoff valve for the cold water supply pipe.
● Open the hot water tap connections so that the draw-off
volume can be set as high as possible.
● Once water has been discharged from the tap connections do
not interrupt the cold water flow; this will ensure that the heat
exchanger will be fully vented and that any impurities or resi-
due will be discharged.

4.6.3 Filling the storage tank

See chap. 7.3.

4.6.4 Filling the heating system

See chap. 7.4.
Explanation
O only after completion of all
2
Installation and maintenance instructions
31