Daikin Altherma 3 GEO, Installer'S Reference Manual

Page: 76 / 252

7 | Piping installation
Installer reference guide
76
EGSAH/X06+10UDA9W
Daikin Altherma 3 GEO
4P598592-1A – 2019.12
NOTICE
▪
All pipework and fittings must be flushed free of flux and debris prior to installing
the domestic hot water tank kit. Failure to do this may cause irreparable damage
to the tank kit controls. Flush the system by opening the hot water tap.
▪
The tundish pipework must be a 22 mm metal pipe with a minimal vertical length
of 300 mm below the tundish before any elbows or bends in the pipework. All
pipework must have a continuous fall of 1 in 200 thereafter. Maximum permitted
(equivalent) length of 22 mm pipework is 9 m. Each bend or elbow is equivalent
to 0.8 m of pipework.
7.3.5 To connect the recirculation piping
Prerequisite: Only required if you need recirculation in your system.
1 Remove the top panel from the unit, see "6.2.2 To open the indoor
unit" [ 4 55].
2 Cut out the rubber grommet on top of the unit, and remove the stop. The
recirculation connector is located below the space heating/cooling water
outlet pipe.
3 Route the recirculation piping through the grommet and connect it to the
recirculation connector.
4 Reattach the top panel.
7.3.6 To fill the space heating circuit
To fill the space heating circuit, use a field supply filling kit. Make sure you comply
with the applicable legislation.
NOTICE
▪
Air in the water circuit can cause malfunctioning of the backup heater. During
filling, it may not be possible to remove all the air from the circuit. Remaining air
will be removed through the automatic air purge valves during the initial
operating hours of the system. Additional filling with water afterwards may be
required.
▪
To purge the system, use the special function as described in the chapter
"11 Commissioning" [ 4 199]. This function should be used to purge the heat
exchanger coil of the domestic hot water tank.