Daikin Altherma EPGA11DAV3, Installation Manual

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4 Installation
Installation manual
8
EPGA11~16DAV3
Daikin Altherma – Low temperature split
4P556065-1 – 2018.10
4.3 Connecting the water piping
4.3.1 To connect the water piping
a
b
a Water inlet
b Water outlet
NOTICE
About the shut-off valve with integrated filter (delivered as
accessory):
▪ The installation of the valve at the water inlet is
mandatory.
▪ Mind the flow direction of the valve
1 Connect the O-rings and shut-off valve to the outdoor unit water
inlet.
2 Connect the field piping to the shut-off valve.
3 Connect the field piping to the outdoor unit water outlet.
NOTICE
Install air purge valves at all local high points.
4.3.2 To fill the water circuit
For information on filling the water circuit, refer to the installation
manual of the indoor unit, or the installer reference guide.
4.3.3 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)