Emptying The System; Non-Return Valve - DAB e.sybox Instructions Pour L'installation Et L'entretien

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ENGLISH
Use of end "E":
this is practically a straight tip screwdriver this is practically a straight tip screwdriver
of the correct size for manoeuvring the mo-
tor shaft access cap and, if the interface for tor shaft access cap and, if the interface for
quick connection of the system has been
installed (par. 15.3), for access to the key
for disengaging the connection. If the key
is lost or damaged, the same operations
can be performed using a straight tip
screwdriver of a suitable size.
Use of end "F":
the function of this tool is dedicated to
maintenance of the non-return valve and it
is better described in the respective paragraph 10.3.

10.2 - Emptying the system

If you want to drain the water out of the system, proceed as follows:
1. disconnect the power supply;
2. turn on the delivery tap closes to the system so as to remove
pressure from the system and empty it as much as possible;
3. if there is a check valve immediately downstream from the sys-
tem (always recommended), close it so as not to let out the water
that is in the plant between the system and the first turned on tap;
4. interrupt the suction pipe in the point closest to the system (it is
always recommended to have a check valve immediately up-
stream from the system) so as not to drain the whole suction
system;
5. remove the drainage cap (fig.1 face E) and let out the water
inside (about 2.5 litres);
6. the water that is trapped in the delivery system downstream
from the non-return valve integrated in the system can flow out
at the time of disconnecting the system, or on removing the cap
of the second delivery (if not used).
Though essentially drained, the system is unable to expel all the
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water that it contains.
During handling of the system after emptying it, some small
amounts of water may probably leak out from the system.

10.3 - Non-return valve

The system has an integrated non-return valve which is necessary for cor-
rect operation. The presence of solid bodies or sand in the water could
cause malfunctioning of the valve and therefore of the system. Although it
is recommended to use fresh water and eventually fit filters on input, if you
notice abnormal operation of the non-return valve it can be extracted from
the system and cleaned and/or replaced by proceeding as follows:
1. remove the valve access cap (Fig.27);
2. insert the accessory cross key in end "F" (par. 10.1) so as to
Figura 26
catch the perforated tab with the hooks (Fig.27);
3. extract without rotating: the operation may require a certain ef-
fort. A cartridge is extracted which also holds the valve to be
serviced. The cartridge remains on the key (Fig.27);
4. disengage the cartridge from the key: the hooks are released
by pushing the cartridge and the key against each other, at this
point slip the cartridge off the side (Fig.27);
5. clean the valve under running water, ensure that it is not dam-
aged and replace it if necessary;
6. put the complete cartridge back in its seat: the operation re-
quires the force necessary to compress the 2 O-rings. If neces-
sary, use end "D" of the cross key to help you push. Do not use
end "F" or the hooks will again engage the tab of the cartridge
and it will be impossible to release them (Fig.27);
7. Screw on the cap till snug: if the cartridge has not been pushed
correctly in place, screwing on the cap will complete its position-
ing (Fig.27).