DAB ESYBOX MAX 60/120M Instructions Pour L'installation Et La Maintenance page 39

Should one or more O-rings be lost or damaged during maintenance operations on the non-return valve, they must be
replaced. Otherwise the system might not work correctly.
13.4 Motor shaft
The electronic control of the system ensures smooth starts so as to avoid excessive stress on the mechanical parts and thus prolong the life of
the product. In exceptional cases this characteristic could cause problems in starting the pump: after a period of inactivity, perhaps with the
system drained, the salts dissolved in the water could have settled and formed calcification between the moving part (motor shaft) and the fixed
part of the pump, thus increasing the resistance on starting. In this case it may be sufficient to help the motor shaft by hand to detach itself from
the calcifications. In this system the operation is possible because access to the motor shaft from outside is guaranteed and a groove is
provided at the end of the shaft. Proceed as follows:
1. Disconnect the electric power supply.
2. Remove the lifting eyebolt inside the upper compartment by unscrewing it (Fig.22).
During the operation take care not to let impurities (liquid or solid) enter the motor.
3. With the help of a straight tip screwdriver, operate the motor shaft by rotating it through
the track that remains visible on its upper face. The direction of rotation is not
important, just check that it can turn freely.
4. Screw the eyebolt back into place, making sure that the O-Ring has not been removed
or damaged during operation 2.
13.5 Expansion Vessel
See paragraph 1.4 for the operations to check and adjust the air pressure in the expansion vessel.
To replace it in case of breakage, follow the steps below:
1. Disconnect the electric power supply.
2. Drain the section of system on which the tank is mounted (remove pressure from the system, close the valve nearest to the pump
otherwise the whole system will be drained, open the drain plug of the pump delivery manifold -Fig.20a-, facilitate water drainage by
loosening the filling cap in the technical compartment so that air can be drawn in)
3. Remove the casing (vessel cover) simply by pulling it, this is fixed by a double cylindrical snap-on coupling (Fig.23a);
4. Remove the retaining screw with a screwdriver and remove the metal fork using pliers (Fig.23b).
5. Remove the retaining screw (Fig.24a) with a torx screwdriver and open the retaining collar (Fig.24b, two snap hooks, and turn it on its
hinges).
6. Pull the expansion tank upwards until the O-Ring disengages from its seat on the delivery curve. Take care because the O-Ring will
make some resistance. At this point the expansion vessel is free in the operator's hand.
7. Slacken the screw (Fig.25a) until the ring on the expansion tank is idle.
8. Take the ring off the expansion tank (Fig.25b).
9. Check the O-Ring (Fig.25c) and replace it if damaged (unless it is already supplied mounted on the DAB spare part, in which case it
can be scrapped together with the vessel to be replaced).
ENGLISH
78
Figure 22