Kessel Aqualift XL Basic Instructions De Pose Et D'utilisation page 25

4.4.1 Connecting the pressure pipe
The following options exist for connecting the pressure pipe
made of polyethylene:
Attach the enclosed clamp connector (DN50) and fix with
a turn fastener.
But sealing with heat reflectors, directly on the pressure
outlet.
4.4.2 Connect the pipes
Drill the holes
Define the pipe routing for inlet pipe(s), cable conduit and
ventilation pipe. One seal for the pipe penetration of each
of these pipes is included in the scope of delivery.
Mark on drill holes; note the following
All pipes must be drilled above the switch-off level.
Drilling is only permitted on flat areas without struts
(grey all round areas)
The cable conduit and ventilation pipe (dotted line
area) should be near the top of the tank.
The cable conduit must be routed with a continuous
rising gradient.
The ventilation pipe must be routed to above the roof
of the building.
Provide hole saw with suitable size (see Technical Data
chapter)
Position drill vertically and start cutting with low feed but
high torque.
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Installation and operating instructions 25 / 52