Daikin Altherma 3 R F, Installer'S Reference Manual

Page: 105 / 312

8 | Piping installation
Installer reference guide
105
ERLA11~W1 + EBVH16SU23DJ
Daikin Altherma 3 R F
4P655196-1 – 2021.09
▪ Glycol. For safety reasons, it is NOT allowed to add any kind of glycol to the
water circuit.
▪ Piping length. It is recommended to avoid long runs of piping between the
domestic hot water tank and the hot water end point (shower, bath,…) and to
avoid dead ends.
▪ Piping diameter. Select the water piping diameter in relation to the required
water flow and the available external static pressure of the pump. See
"17 Technical data" [
4
282] for the external static pressure curves of the indoor
unit.
▪ Water flow. You can find the minimum required water flow for indoor unit
operation in the following table. In all cases, this flow needs to be guaranteed.
When the flow is lower, the indoor unit will stop operation and display error 7H.
If operation is… Then the minimum required flow rate
is…
Heating/defrost 22 l/min
Domestic hot water production
▪ Field supply components – Water. Only use materials that are compatible with
water used in the system and with the materials used in the indoor 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 – Domestic hot water. The maximum water pressure is 4 bar.
Provide adequate safeguards in the water circuit to ensure that the maximum
pressure is NOT exceeded. The minimum water pressure to operate is 1 bar.
▪ Water pressure – Space heating/cooling circuit. The maximum water pressure is
3 bar. Provide adequate safeguards in the water circuit to ensure that the
maximum pressure is NOT exceeded. The minimum water pressure to operate is
1 bar.
▪ 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.
89°C (*)
60°C (*)
M
EXAMPLE
(*) Maximum temperature for piping and accessories