AERMEC NRL 0280 FE, Руководство по установке и обслуживанию

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19
EN
11.3. SYSTEM LOAD
− Before starting the load, check that the system
drain tap is closed.
− Open all the drain valves of the system and of the
related terminals.
− Open the shut-off devices of the system.
− Start the filling by slowly opening the water
system load cock placed outside the machine.
− When water begins to flow from the terminal vent
valves, close them and continue loading up to
read on the gauge the value of 1.5 bar.
The system is loaded at a pressure between 1 and 2
bar. It is advisable to repeat this operation once the
machine has worked for some hours and to periodically
check the system pressure, restoring if it drops below 1
bar.Check the hydraulic seal of the joints.
11.4. EMPTYING THE SYSTEM
− Before starting to drain the system, turn "off" the
unit
− Check that the water system load/restore tap is
closed
− Open the drain tap outside the machine and all
the vent valves of the system and the correspon-
ding terminals.
If the system uses glycol, this liquid should not be drai-
ned to the environment because it is a pollutant.
It must be collected and, if possible, reused.
ATTENTION
In case of version with pumping
unit, without standby pump, it is
recommended to install unidirec-
tional valves to the delivery of each
module.
So water reflow is avoided
in the circuit of the pump/s
from the other circuit.
It is necessary, that the water flow
rate to the chiller unit complies with
the values reported in the perfor-
mance tables.
The systems loaded with anti-freeze
or specific regulations, need the
water backflow system.
Special supply/recovery water, is car-
ried out with appropriate treatment
systems.