Daikin Altherma EVLQ05+08CA Installer's Reference Manual page 46

6 | Preparation
Installer reference guide
46
▪ Water pressure. The maximum water pressure is 3 bar. Provide adequate
safeguards in the water circuit to ensure that the maximum pressure is NOT
exceeded.
▪ Water temperature – Heat pump convectors. In case heat pump convectors are
connected, the temperature of the water in the convectors should NOT exceed
65°C. If necessary, install a thermostatic controlled valve.
▪ Water temperature – Underfloor heating loops. In case underfloor heating
loops are connected, install a mixing station to prevent water that is too hot from
entering the underfloor heating circuit.
▪ 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.
65°C
a b d e
c f
a Outdoor unit
b Indoor unit
c Heat exchanger
d Boiler
e Bypass valve
f Pump
g Shut-off valve (field supply)
h Motorised 3-way valve (in option kit)
i Collector
j Domestic hot water tank (optional)
k Heat exchanger coil
FCU1...3 Fan coil unit (optional)
RAD1...3 Radiator (field supply)
▪ Drainage – Low points. Provide drain taps at all low points of the system in order
to allow complete drainage of the water circuit.
▪ Drainage – Pressure relief valve. Provide a proper drain for the pressure relief
valve to avoid water coming into contact with electrical parts.
▪ Air vents. Provide air vents at all high points of the system, which must also be
easily accessible for servicing. An automatic air purge is provided in the indoor
unit. Check that the air purge is NOT tightened too much, so that automatic
release of air in the water circuit is possible.
▪ Zn-coated parts. Never use zinc coated parts in the water circuit. Because the
internal water circuit of the unit uses copper piping, excessive corrosion may
occur.
95°C
g h
FCU1
FCU2
i
M
g
RAD1 RAD2 RAD3
j
k
EVLQ05+08CAV3 + EHYHBH05AF + EHYHBH/X08AF + EHYKOMB33AA
FCU3
89°C
Daikin Altherma hybrid heat pump
4P355634-1F – 2020.10