Daikin Altherma EAVH16S18DA6V Installation Manual Download

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4 Installation

Installation manual

EAVH/9W

Daikin Altherma – Low temperature split

4P556067-1 – 2018.10

NOTICE

Overpressure bypass valve

(delivered as accessory). We

recommend to install the overpressure bypass valve in the
space heating water circuit.

▪ Mind the minimum water volume when choosing the

installation location of the overpressure bypass valve
(at the indoor unit, or at the collector). See

"3.2.1 To

check the water volume and flow rate" on page 4

▪ Mind the minimum flow rate when adjusting the

overpressure bypass valve setting. See

"3.2.1 To

check the water volume and flow rate" on page 4

and

"6.2.1 To check the minimum flow rate" on page 20

NOTICE

Install air purge valves at all local high points.

NOTICE

A  pressure  relief  valve  (field  supply)  with  an  opening
pressure  of  maximum  10  bar  must  be  installed  on  the
domestic  cold  water  inlet  connection  in  accordance  with
the applicable legislation.

4.3.2

To connect the recirculation piping

Prerequisite:

Only required if you need recirculation in your system.

Remove the top panel from the unit, see

"4.1.1 To open the

indoor unit" on page 5

Cut out the rubber grommet on top of the unit, and remove the
stop. The recirculation connector is placed below the hole.

Route the recirculation piping through the grommet and connect
it to the recirculation connector.

Reattach the top panel.

4.3.3

To fill the water circuit

To fill the water circuit, use a field supply filling kit. Make sure you
comply with the applicable legislation.

INFORMATION

Make sure both air purge valves (one on the magnetic filter
and one on the backup heater) are open.

4.3.4

To protect the water circuit against
freezing

About freeze protection

Frost can damage the system. To prevent the hydraulic components
from freezing, the software is equipped with special frost protection
functions such as water pipe freeze prevention and drain prevention
(see installer reference guide) that include the activation of pump in
case of low temperatures.

However, in case of a power failure, these functions cannot
guarantee protection.

Do one of the following to protect the water circuit against freezing:

▪ Add glycol to the water. Glycol lowers the freezing point of the

water.

▪ Install freeze protection valves. Freeze protection valves drain the

water from the system before it can freeze.

NOTICE

If you add glycol to the water, do NOT install freeze
protection valves.

Possible consequence:

Glycol leaking

out of the freeze protection valves.

Freeze protection by glycol

Adding glycol to the water lowers the freezing point of the water.

The required concentration depends on the lowest expected outdoor
temperature, and on whether you want to protect the system from
bursting or from freezing. To prevent the system from freezing, more
glycol is required. Add glycol according to the table below.

INFORMATION

▪ Protection against bursting: the glycol will prevent the

piping from bursting, but NOT the liquid inside the
piping from freezing.

▪ Protection against freezing: the glycol will prevent the

liquid inside the piping from freezing.

Lowest expected
outdoor
temperature

Prevent from
bursting

Prevent from
freezing

–5°C

10%

15%

–10°C

15%

25%

–15°C

20%

35%

–20°C

25%

—

–25°C

30%

—

NOTICE

▪ The required concentration might differ depending on

the type of glycol. ALWAYS compare the requirements
from the table above with the specifications provided by
the glycol manufacturer. If necessary, meet the
requirements set by the glycol manufacturer.

▪ The added concentration of glycol should NEVER

exceed 35%.

▪ If the liquid in the system is frozen, the pump will NOT

be able to start. Mind that if you only prevent the
system from bursting, the liquid inside might still freeze.

▪ When water is at standstill inside the system, the

system is very likely to freeze and get damaged.

The types of glycol that can be used depend on whether the system
contains a domestic hot water tank:

If…

Then…

The system contains a domestic
hot water tank

Only use propylene glycol

(a)