Daikin EHY2KOMB32AA — руководство по подготовке установки: компоненты и требования [63/236]

Daikin EHY2KOMB28AA [63/236] Preparation
8 | Preparation
Installer reference guide
63
EJHA04AAV3 + EHY2KOMB28+32AA
Daikin Altherma H Hybrid
4P531180-1B – 2020.02
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 – 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 temperatures as indicated in
"5.1.1Dedicated gas boiler"[423].
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. If you use automatic air purge valves, 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.
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.
Dirt separator Old heating installations. In case of old heating installations, it
is recommended to use a dirt separator. Dirt or sediment from the heating
installation can damage the unit and reduce its lifetime. The domestic hot water
circuit can also be protected by a filter to prevent failure during domestic hot
water operation.
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.

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