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SYSTEM PRESSURISATION - TESTING AT THE MAXIMUM PRESSURE.
After completing the steps to fill the circuits, pressurise (via the loading system provided with the boiler) the control unit/manifold and
circuits it supplies.
Filling. Preliminary Test.
Bleed the air from each circuit, fill and pressurise to twice the operating pressure (at least 6 bar). Check the tightness after 2 hours
and keep at 6 bar for another 22 hours. During this step the shut-off valves (1) must be closed to avoid tripping the boiler's safety
valve.
The pressure must be increased by using the manual loading pump (Fig. 2) or another available system connected to the hose
connection fitting (5) or (6). Check the pressure value by reading it on the manometer (Fig. 4).
NOTE: In any case, the maximum pressure must never exceed the maximum pressure that can be tolerated by the components as
indicated by the manufacturer.
Final test. Setting the post-testing pressure.
After the preliminary test (24 hours), check for any pressure drops, which is usually caused by the physiological expansion of the pipes
or room temperature variation, etc. Then bring the pressure back to the values indicated for the preliminary test and maintain them for
another 24 hours. At this stage the pressure drop must be within 0.3 bar.
After completing the test, bring the pressure back to the system's operating values and maintain it until the screed's curing process is
completed, and the screed can then be applied.
NOTE: At the end of the test, it is good practice to complete the form declaring that the pressurised testing has been carried out
successfully on the systems and hand this over to the client.
Ensuring the systems are safe.
It is good practice to install all the components (expansion vessels, overpressure discharge valves, etc.) designed to prevent any
anomalous pressure increases in the closed circuit, which would cause the components to malfunction.
These increases are due to environmental phenomena such as temperature variations throughout the day or seasonal ones or screed
curing processes, which may considerably change the temperatures and, as a result, the volume of the fluids contained. This all
happens to a greater or lesser extent also depending on the size and therefore overall volume of the fluid in the system. Please state
the above-mentioned components have been installed in the testing form.
NOTE: Should there be a very harsh climate in winter, with the risk of freezing, it is good practice to add anti-freezing additives to the
fluid. These must then need to be removed by washing them out or by fully emptying the system with pressurised air. Alternatively,
consider the option of testing the system with pressurised air.
To add the anti-freezing additives and for the specific instructions related to the system's circuits, please refer to the
manufacturer's technical data sheets. Incorrect use can cause serious damage to the system.
If the pressurisation is carried out with compressed air, the special sealing cap (11) must be closed. If you do not adopt
this solution, the relief valve would keep on letting out the injected air.
Fig. 1
Instructions for RBM product IP2028.0-EN_01
(see also Standard UNI-EN 1264-4:2003)
1
Fig. 2
Fig. 3
RBM
11
5
6
Manometer connection coupling:
Fig. 4
Use a manometer Ø 40 with
a
16
bar
G1/8"
radial
coupling code 7469.005 for
the
connection
to
the
manual/automatic end units
and bypass unit.
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