Daikin EBLA08E23V3, Installation Manual

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5 Piping installation
Installation manual
12
EBLA04~E23V3 + EDLA04~E23V3
Daikin Altherma 3 M
4P685229-1D – 2022.10
2
2
2
5×
1
3.55 N.m
a
a Speed nut
5 Piping installation
5.1 Preparing water piping
NOTICE
In case of plastic pipes, make sure they are fully oxygen
diffusion tight according to DIN 4726. The diffusion of
oxygen into the piping can lead to excessive corrosion.
NOTICE
Water circuit requirements. Make sure to comply with the
water pressure and water temperature requirements
below. For additional water circuit requirements, see the
installer reference guide.
▪ Water pressure. The maximum water pressure is 4 bar. Provide
adequate safeguards in the water circuit to ensure that the
maximum pressure is NOT exceeded.
▪ Water temperature. All installed piping and piping accessories
(valve, connections,…) MUST withstand the following
temperatures:
INFORMATION
The following figure is an example and may NOT
completely match your system layout
65°C (*)
M
M
89°C (*)
EXAMPLE
(*) Maximum temperature for piping and accessories
5.1.1 To check the water volume and flow rate
Minimum water volume
Check that the total water volume in the installation is higher than
the minimum water volume, the internal water volume of the outdoor
unit NOT included:
If… Then the minimum water
volume is…
Cooling operation 10 l
Heating/defrost operation and…
Preheating on the tank is possible.
This is possible in the following
cases:
▪ EKHWP* tank + booster heater
▪ EKHWS*D* tank + booster heater
+ DHW pump
0 l
Preheating on the tank is not
possible, but a backup heater
(internal or external) is present. 10 l
Preheating on the tank is not
possible, there is no backup heater,
and…
The return flow temperature is
>15°C 20 l
The return flow temperature is
≤15°C 50 l
NOTICE
Never use less water than the minimum water volume. It
may cause the unit to malfunction.
NOTICE
When circulation in each space heating/cooling loop is
controlled by remotely controlled valves, it is important that
the minimum water volume is guaranteed, even if all of the
valves are closed or the overpressure bypass valve is
installed in front of the space heating/cooling loop.
Minimum flow rate
Check that the minimum flow rate (required during defrost/backup
heater operation (if applicable)) in the installation is guaranteed in all
conditions.
If operation is… Then the minimum required
flow rate is…
Cooling 10 l/min
Heating 6 l/min
BUH operation 12 l/min
Heating defrost 12 l/min
DHW 25 l/min
NOTICE
If glycol was added to the water circuit, and the
temperature of the water circuit is low, the flow rate will
NOT be displayed on the user interface. In this case, the
minimum flow rate can be checked by way of the pump
test.
NOTICE
When circulation in each or certain space heating loops is
controlled by remotely controlled valves, it is important that
the minimum flow rate is guaranteed, even if all valves are
closed. In case the minimum flow rate cannot be reached,
a flow error 7H will be generated (no heating or operation).
See the installer reference guide for more information.