Draining The Heating System; Condensate Siphon - Beretta MYNUTE X R Installer And User Manual

3.15 Filling the heating system and eliminating air
Note: When the air is being eliminated from the boiler using the deaeration tap (A - fig.
19) the filling of the siphon occurs ("3.17 Condensate siphon"); make very sure that the
level does not exceed the level shown in the figure, if necessary closing the deaeration tap
(A - fig. 19).
Note: the first filling operation must be carried out by turning the filling tap (external to the
boiler) with the boiler OFF.
Note: each time the boiler is powered up, the automatic venting cycle is carried out.
Note: the presence of a water alarm (40, 41 or 42) does not allow the venting cycle to be
carried out. The presence of a domestic hot water request during the venting cycle interrupts
the venting cycle.
Once the hydraulic connections have been made, fill the heating system as follows:
- set the boiler to OFF by pressing button 1
- slowly open the de-aeration tap (A - fig. 19) and the system filling tap (external to the
boiler)
- after about 1 minute, close the de-aeration tap (A - fig. 19)
- wait for the pressure to increase: check that it reaches 1-1.5 bar; then close the system
filling tap (external to the boiler).
Note: if the mains pressure is less than 1 bar, keep the system filling tap (external to the
boiler) open during the venting cycle and close it once it has finished.
- To start the vent cycle shut off the electrical power for a few seconds; connect the power
again leaving the boiler OFF. Check that the gas tap is closed.
- At the end of the cycle, if the circuit pressure has dropped, open the filling tap (external
to the boiler) again to bring the pressure back up to recommended levels (1-1.5 bar).
The boiler is ready after the vent cycle.
- Remove any air in the domestic system (radiators, zone manifolds, etc.) using the bleed
valves.
- Once again check that the system pressure is correct (ideally 1-1.5bar) and restore the
levels if necessary.
- If air is noticed when operating, repeat the vent cycle.
- Once the operations are finished, open the gas tap and ignite the boiler.
At this point it is possible to carry out any heat request.
3.16

Draining the heating system

Before draining, set the boiler to OFF and shut off the electrical supply setting the system's
main switch to "off".
- Close the heating system's taps (if present).
- Open the de-aeration tap (A - fig. 19)
- Connect a pipe to the system discharge valve (C - fig. 19), then manually loosen it to let
the water flow out.
- Once the operations are finished, remove the pipe from the system discharge valve and
close the system discharge (C - fig. 19) and de-aeration (A - fig. 19) taps again.
3.17

Condensate siphon

When the boiler is first started the siphon for collecting the condensate is empty.
When eliminating air from the boiler, the siphon fills.
- Slowly open the de-aeration tap (A - fig. 19) and leave it open until the amount of water
contained in the siphon reaches the ledge.
- Close the de-aeration tap (A- fig. 19)
- Check that there are no leaks from the SRD device connection zone and that the device
allows the liquid to run off correctly.
- Check that the system pressure has not dropped below 1 bar. If necessary, fill the system.
Repeat this operation during maintenance work.
CHECK THAT THE CONDENSATE DRAIN OUTLET SIPHON CONTAINS WATER, IF IT
WAS NOT FILLED PROCEED AS DESCRIBED ABOVE.
ENGLISH
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