Daikin Altherma EAVX-D9WG Installer'S Reference Manual Download Page 23

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6 Preparation

Installer reference guide

EPGA11~ EAVH/9W
Daikin Altherma – Low temperature split
4P556070-1 – 2019.02

▪ Mind the following spacing installation guidelines:

≥300

≥600

≥500

(mm)

INFORMATION

If you have limited installation space, do the following
before installing the unit in its final position:

"7.4.4 To

connect the drain hose to the drain" on page 30

. It

requires to remove one or both side panels.

▪ The foundation must be strong enough to bear the weight of the

unit. Take the weight of the unit with a domestic hot water tank full
of water into account.
Make sure, in the event of a water leak, water cannot cause any
damage to the installation space and surroundings.

Do NOT install the unit in places such as:

▪ In places where a mineral oil mist, spray or vapour may be

present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.

▪ Sound sensitive areas (e.g. near a bedroom), so that the

operation noise will cause no trouble.

▪ In places with high humidity (max. RH=85%), for example a

bathroom.

▪ In places where frost is possible. Ambient temperature around the

indoor unit must be >5°C.

6.3

Preparing water piping

6.3.1

Water circuit requirements

INFORMATION

Also read the precautions and requirements in the
"General safety precautions" chapter.

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.

▪

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.

▪

Insulation.

Insulate up to the base of the heat exchanger.

▪

Freeze.

Protect against freezing.

▪

Closed circuit.

Use the indoor unit ONLY in a closed water

system. Using the system in an open water system will lead to
excessive corrosion.

▪

Piping length.

It is recommended to avoid long runs of piping

between the domestic hot water tank and the hot water end point
(shower, bath,…) and to avoid dead ends.

▪

Piping diameter.

Select the water piping diameter in relation to

the required water flow and the available external static pressure
of the pump. See

"14 Technical data" on page 84

for the external

static pressure curves of the indoor unit.

▪

Water flow.

You can find the minimum required water flow for

indoor unit operation in the following table. In all cases, this flow
needs to be guaranteed. When the flow is lower, the indoor unit
will stop operation and display error 7H.

Minimum required flow rate

20 l/min

▪

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.

The maximum water pressure is 4 bar. Provide