Daikin ERGA04EAV3A, Installer'S Reference Manual

Page: 77 / 264

8 | Piping installation
Installer reference guide
77
ERGA04~08EAV3(A) + EHBH/X04+08EA/EJ6V+9W
Daikin Altherma 3 R W
4P629085-1 – 2020.08
M
FCU1
FCU2
FCU3
i
M
FHL1
FHL2
FHL3
j
l k
f d e c b a
f
g
h
i
i
i
T
65°C
89°C
a Outdoor unit i Collector
b Indoor unit j Domestic hot water tank
c Heat exchanger k Heat exchanger coil
d Backup heater l Booster heater
e Pump FCU1...3 Fan coil unit (optional) (field supply)
f Shut-off valve FHL1...3 Floor heating loop (field supply)
g Motorised 3-way valve (supplied with the
domestic hot water tank) T Room thermostat (optional) (field supply)
h Motorised 2-way valve (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. Connect the drain hose properly to the drain to
avoid water dripping out of the unit. See "7.4.4 To connect the drain hose to the
drain" [
4
73].
▪ Air vents. Provide air vents at all high points of the system, which must also be
easily accessible for servicing. Two automatic air purges are provided in the
indoor unit. Check that the air purges are 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 is 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.
▪ Domestic hot water tank – Capacity. To avoid stagnation of water, it is
important that the storage capacity of the domestic hot water tank meets the
daily consumption of domestic hot water.
▪ Domestic hot water tank – After installation. Immediately after installation, the
domestic hot water tank must be flushed with fresh water. This procedure must
be repeated at least once a day the first 5 consecutive days after installation.