en – Original Instructions
20
SCUBA DRY – Additional Installation, Operation and Maintenance Instructions
4.3.2
Connecting submerged units
Preliminary operations
1.
Check that the tank or the basin are of appropriate size for housing the unit, with an even
perimeter without obstacles.
2.
Check that the sizes of the tank/basin do not hinder the free movement of the float switch
and the float suction filter, if present.
Guidelines
1.
Connect the piping to the unit discharge port:
a)
In case of metal piping, this should be screwed directly to the port;
b)
In case of plastic piping, use an adapter.
2.
Install a check valve on the piping, at least 2 m (7 ft) from the unit, and then one every 10 m
(33 ft).
3.
Make a 3 mm (1/8”) relief hole 10 cm (3.9 in) from the discharge port.
4.
Secure the power supply cord to the piping with nylon ties at distances of 3 m (10 ft) from
each other, keeping it loose from one tie and the next, to avoid it being pulled in case of
piping expansion.
5.
Secure a rope made of non-perishable material to the lifting ring.
6.
Lower the unit in the tank/basin holding it with the rope.
7.
Position the unit:
•
At the centre of the tank/basin
•
Submerged in the liquid at a depth of at least 15 cm (6 in)
•
At a maximum depth of 17 m (56 ft) from the maximum level of the liquid
•
With at least 3 m (10 ft) of power supply cord out of the liquid
•
With the float switch, if installed, at least 5 cm (2 in) from the wall of the tank/basin
•
With the float suction filter, if installed, below the water level.
