Daikin Altherma EHYHBH05A Series, Installer'S Reference Manual

Page: 98 / 264

8 | Piping installation
Installer reference guide
98
08CA + EHY EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
M
89°C
RAD1 RAD2 RAD3
95°C
65°C
a b d e
j
k
i
c f g
FCU1
FCU2
FCU3
h g
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.
▪ Non-brass metallic piping. When using non-brass metallic piping, insulate the
brass and non-brass properly so that they do NOT make contact with each other.
This to prevent galvanic corrosion.
▪ Valve – Separating circuits. When using a 3-way valve in the water circuit make
sure that the domestic hot water circuit and the floor heating circuit are fully
separated.
▪ Valve – Change‑over time. When using a 2-way valve or a 3-way valve in the
water circuit, the maximum change-over time of the valve must be 60 seconds.
▪ Filter. It is strongly recommended to install an additional filter on the heating
water circuit. Especially to remove metallic particles from foul heating piping, it is
recommended to use a magnetic or cyclone filter, which can remove small
particles. Small particles may damage the unit and will NOT be removed by the
standard filter of the heat pump system.