Daikin EKHWSU150D3V3 [7/24] Overview preparation
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Daikin EKHWSU150D3V3 [7/24] Overview preparation

Daikin EKHWSU300D3V3 [7/24] Overview preparation
5 Preparation
Installation manual
7
EKHWSU150~300D3V3 + EKEXPVES
Domestic hot water tank with option kit for air to water heat pump
system
4P510673-1B – 2018.01
5 Preparation
5.1 Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the water piping
▪ Preparing the electrical wiring
5.2 Preparing the installation site
5.2.1 Installation site requirements of the
domestic hot water tank
▪ Mind the following spacing installation guidelines:
400 mm
20°
105°
300 mm
▪ The domestic hot water tank is designed for indoor installation
only and for ambient temperatures ranging from 0~35°C.
▪ Take care that in the event of a leak, water cannot cause any
damage to the installation space and surroundings.
5.3 Preparing water piping
5.3.1 Water circuit requirements
NOTICE
In case of plastic pipes, make sure they are fully oxygen
diffusion tight according to DIN 4726. The diffusion of
oxygen into the piping can lead to excessive corrosion.
NOTICE
Do NOT use the pressure relief valve connection for other
purposes.
▪ Connecting piping – Legislation. Make all piping connections in
accordance with the applicable legislation and the instructions in
the "Installation" chapter, respecting the water inlet and outlet.
▪ Connecting piping – Force. Do NOT use excessive force when
connecting the piping. Deformation of the piping can cause
malfunctioning of the unit.
▪ Connecting piping – Tools. Only use appropriate tooling to
handle brass, which is a soft material. If NOT, pipes will get
damaged.
▪ Connecting piping – Air, moisture, dust. If air, moisture or dust
gets into the circuit, problems may occur. To prevent this:
▪ Only use clean pipes
▪ Hold the pipe end downwards when removing burrs.
▪ Cover the pipe end when inserting it through a wall, to prevent
dust and/or particles entering the pipe.
▪ Use a decent thread sealant to seal connections.
▪ Glycol. For safety reasons, it is NOT allowed to add any kind of
glycol to the water circuit.
▪ Field supply components – Water pressure and temperature.
Check that all components in the field piping can withstand the
water pressure and water temperature.
▪ Drainage – Low points. Provide drain taps at all low points of the
system in order to allow complete drainage of the water circuit.
▪ 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.
▪ 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.
▪ Domestic hot water tank – Pressure relief valve. A pressure
relief valve (part of the inlet control group) with an opening
pressure of 6bar prevents excessive water pressure in the water
circuit.
▪ Domestic hot water tank – Temperature and pressure relief
valve. The temperature and pressure relief valve prevents
excessive water temperature (>95°C) and excessive water
pressure (≥7 bar) in the domestic hot water tank.
▪ Domestic hot water tank – G3 kit and EKEXPVES kit. When
installing an EKHWSU* domestic hot water tank, installing the
included G3 kit and the option kit EKEXPVES is obligatory. Refer
to the UK Building Regulation G3.

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