4 Installation
Installation manual
8
EBLQ+07CAV3
Daikin Altherma low temperature monobloc
4P403578-1C – 2016.02
4.3
Connecting the water piping
4.3.1
To connect the water piping
NOTICE
Do NOT use excessive force when connecting the piping.
Deformation of the piping can cause malfunctioning of the
unit. Make sure that the tightening torque does NOT
exceed 30 N•m.
To facilitate service and maintenance, 2 shut-off valves are provided.
Mount the valves on the water inlet and on the water outlet. Mind
their position: the integrated drain valves will only drain the side of
the circuit on which they are located. To be able to only drain the
unit, make sure the drain valves are positioned between the shut‑off
valves and the unit.
a
b
a
Water inlet
b
Water outlet
1
Screw the outdoor unit nuts on the shut-off valves.
2
Connect the field piping on the shut-off valves.
3
In case of connection with the optional domestic hot water tank,
see the installation manual of the domestic hot water tank.
NOTICE
▪ Install a manometer in the system.
▪ Install air purge valves at all local high points.
4.3.2
To protect the water circuit against
freezing
Frost can damage the system. To prevent the hydraulic components
from freezing, the software is equipped with special frost protection
functions, that include the activation of pump, internal heaters, and/
or backup heater operation in case of low temperatures.
However, in case of a power failure, these functions cannot
guarantee protection. It is therefore recommended to add glycol to
the water circuit. 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.
▪ In case of a power supply failure or pump failure, and
NO glycol was added to the system, drain the system.
▪ 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)
The system does NOT contain a
domestic hot water tank
You can use either propylene
glycol
(a)
or ethylene glycol
(a)
Propylene glycol, including the necessary inhibitors,
classified as Category III according to EN1717.
WARNING
Ethylene glycol is toxic.
NOTICE
Glycol absorbs water from its environment. Therefore do
NOT add glycol that has been exposed to air. Leaving the
cap off the glycol container causes the concentration of
water to increase. The glycol concentration is then lower
than assumed. As a result, the hydraulic components
might freeze up after all. Take preventive actions to ensure
a minimal exposure of the glycol to air.
NOTICE
▪ If overpressure occurs, the system will release some of
the liquid through the pressure relief valve. If glycol was
added to the system, take adequate measures so as to
safely recover it.
▪ In any case, make sure that the flexible hose of the
pressure relief valve is ALWAYS free to release
pressure. Prevent water from staying and/or freezing
up inside the hose.
