Daikin Altherma 3 M Installer's Reference Manual page 74

8 | Piping installation
Installer reference guide
74
▪ Piping diameter. Select the water piping diameter in relation to the required
water flow and the available external static pressure of the pump.
For the external static pressure curves of the outdoor unit, see the technical
data. A subset of the latest technical data is available on the regional Daikin
website (publicly accessible). The full set of latest technical data is available on
the Daikin Business Portal (authentication required).
▪ Water flow. You can find the minimum required water flow for unit operation in
the following table. In all cases, this flow needs to be guaranteed. When the flow
is lower, the unit will stop operation and display error 7H.
If operation is...
Cooling
Heating/defrost when outdoor
temperature is above –5°C
Heating/defrost when outdoor
temperature is below –5°C
Domestic hot water production
▪ Field supply components – Water and glycol. Only use materials that are
compatible with the water (and, if applicable, glycol) used in the system, and
with the materials used in the outdoor unit.
▪ Field supply components – Water pressure and temperature. Check that all
components in the field piping can withstand the water pressure and water
temperature.
▪ 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 illustration is an example and might NOT match your system layout.
60°C
Then the minimum required flow rate
M
M
is...
20 l/min
22 l/min
28 l/min
89°C
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
4P620241-1 – 2020.06