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4.1.6
Characteristics of the supply water
Make sure that the system is supplied with water having a hard-
ness between 8°F and 15°F and conductivity below 500 μS/cm.
In zones where the water is particularly hard, mount a water
softener.
Where the filling water is aggressive (the pH should be main-
tained between 6.6 and 8.5), ferruginous or hard, use treated
water to prevent scale deposits, corrosion, and damage to the
appliance. Even a slight amount of impurities in the water may
lower the system's performances.
The filling water used must strictly be treated in the case of
high-capacity installations (high volumes of water) or if fre-
quent water top-ups are required to maintain a constant lev-
el of liquid in the system. If the system must be cleaned, fill it
completely with treated water.
Glycol adversely affects the appliance's performances and we
strongly advise not to use it. If glycol is nonetheless used, ARIS-
TON shall not be held liable for any loss of efficiency of the
system and recommends dosing it properly and performing
maintenance.
4.1.7
Filling the system
During filling, it may not be possible to remove all the air from
the system. The residual air will be removed through the auto-
matic air relief valves during the initial hours of operation of the
system. If the system's pressure drops excessively, fill the circuit
with water.
a
The installation, initial start up, and configura-
tion must be carried out in accordance with the
instructions, by a qualified technician only. The
manufacturer declines all responsibility for dam-
ages caused to people, animals or possessions
following incorrect installation of the appliance.
a
During initial filling of the system, check the out-
flow of water from the automatic relief outlet.
The water outflow makes the sealing discs inside
the valve work effectively. We recommend per-
forming the operation with a cloth to absorb the
excess water.
To speed up filling of the system, the system can be deaerated
manually as follows:
– Mount the pipe (1) supplied on the manual deaerator
outlet.
– Open the manual deaerator (2) and channel the water
towards the outside the machine.
– Deaerate the system for a few minutes until all the air
has been removed from the pipes.
– Close the deaerator.
28 / EN
1-ZONE configuration
a
The accumulation of air can cause malfunctions
to the system and damage the components.
Note: during the initial start-up the automatic deaeration
function is activated, which is necessary to ensure the system's
correct operation. The activation of the automatic deaeration
cycles of the system following the initial start-up can be per-
formed using the Air-purge function 1.12.0 command.
a
The indoor unit contains a pressure gauge which
can be accessed by the installer during the first
filling phase. The system's pressure can nonethe-
less be read through the system interface (pa-
rameter 1.16.7). If the interface is not installed
on the machine, we recommend using an exter-
nal pressure gauge to check the pressure and al-
low the user to fill the system with water.
Check the water pressure on the pressure gauge regularly and
make sure that the pressure is between 0.5 and 1.5 bar when
the system is cold.
If the pressure is below the minimum value, it must be in-
creased through the filling cock.
Close the cock once the average value of 1.2 bar has been
reached.
The maximum pressure of the heating/cooling system is 3 bar.
a
If frequent fillings (once a month or more fre-
quently) are required for your system, this indi-
cates a potential problem with the installation
(leaks, expansion vessel problems). Contact your
trusted installer to analyse and solve the prob-
lem quickly, and to prevent damage caused by
corrosion of the components due to excessive
water replacement in the system.
Hydraulic connections
2
1
Fig. 53
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