Daikin EKHWET-BV3, Руководство по установке для специалистов

Страница: 41 / 120

8 | Piping installation
Installer reference guide
41
E120B
R32 Split series – Domestic hot water tank
4P680077-1A – 2022.11
▪ 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 7 bar
(=0.7 MPa), and must be in accordance with the applicable legislation. Provide
adequate safeguards in the water circuit to ensure that the maximum pressure is
NOT exceeded (see
"8.4.3 To connect the water piping" [
4
42]). The minimum
water pressure to operate is 1 bar (=0.1 MPa).
▪ Water temperature. All installed piping and piping accessories (valve,
connections,…) MUST withstand the following temperatures:
INFORMATION
The following figure is an example and may NOT completely match your system
layout
89°C (*)
EXAMPLE
(*) Maximum temperature for piping and accessories
▪ Air vents. Provide air vents at all high points of the system, which must also be
easily accessible for servicing.
▪ 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 – 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.
▪ Domestic hot water tank – Standstills. In cases where during longer periods of
time there is no consumption of hot water, the equipment MUST be flushed with
fresh water before usage.
▪ Thermostatic mixing valves. In accordance with the applicable legislation, it may
be necessary to install thermostatic mixing valves.
▪ Hygienic measures. The installation must be in compliance with the applicable
legislation and may require additional hygienic installation measures.
▪ Domestic hot water tank – Disinfection. For the disinfection function of the
domestic hot water tank, see "10.6.2 Tank" [
4
70].