DAB AQUATWIN TOP 132 Instruction For Installation And Maintenance page 38

Connection on intake:
The AQUATWIN TOP system offers the possibility of managing one or two separate rain water collection
tanks.
For the connection of a single collection tank, make the connection of the two separate intakes which must
be taken individually to the tank.
Installation:
Place the AQUATWIN TOP in a well ventilated place, protected from unfavourable weather conditions, and
with an environment temperature not higher than 40°C, on an even surface; if this is not possible, use the
adjustable vibration-damping feet (ref.1 Fig.1).
After having positioned and stabilised the AQUATWIN TOP, make the connection to the water mains with a
1" pipe connected to the interception valve provided (ref.1.fig.3).
Connect the intakes (ref.4. fig.3) to the pipes arriving from the rain water storage tanks, paying particular
attention that they are inclined towards the tank to avoid the formation of air pockets (avoid swan necks, the
pipes must never pass over the pumps), avoid letting the pipes exert forces on the intake mouths.
Install the system as close as possible to the rain water collection tank, to ensure a good yield of the pump it
must never exceed a suction length of 20 metres and a height of 3 metres.
If the suction length and height are greater, use another pump connected in series to the system pump to
overcome the system suction problem.
The suction point must always guarantee the intake of clean water; use a suction kit and valves with a filter
to guarantee the supply and prevent impurities blocking the valves or the internal parts of the pumps.
The pipes, which can manage one or two independent tanks, must not have a diameter smaller than the
suction mouths (1"); although the system is provided with check valves, it is recommended to fit foot valves
inside the tanks. If the suction pipe is made of flexible material, always check that it is of the reinforced type
to avoid shrinkage due to suction.
The connection of the secondary utilities (non drinking water) to the mains may be made on both sides of the
delivery manifold with a 1½" flexible pipe; it is not necessary to insert an expansion tank as the AQUATWIN
TOP system already has an 8 litre tank.
Connect the overflow with a 2" pipe (ref.2 fig.3), this pipe must be directed towards a drain to avoid flooding
in the event of malfunction or overflowing of the system.
NEVER CONNECT A PIPE WITH A SECTION SMALLER THAN DN50 TO PREVENT SYSTEM
MALFUNCTIONS.
ANYTHING THAT IS EMPTIED INTO THE OVERFLOW MUST BE VISIBLE (PROVIDE A
"FUNNEL-TYPE"CONNECTION)
Make sure that the discharge pipe has an incline that will guarantee the normal flow of possible discharges.
Connect the discharge to the sewerage system. If the incline of the discharge pipe is insufficient, install a
lifting station in order to guarantee the discharge.
ENGLISH
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