AQUA SPHERE VSP Serie Manual De Instrucciones página 9

4.2 Piping
1) For optimization of the pool plumbing, it is recommended to use a pipe with size of 63mm.
When installing the inlet and outlet fittings (joints), use the special sealant for PVC material.
2) The dimension of suction line should be the same or larger than the inlet line diameter, to
avoid pump sucking air, which will affect the efficiency of the pump.
3) Plumbing on the suction side of the pump should be as short as possible.
4) For most installations we recommend installing a valve on both the pump suction and re-
turn lines, which is more convenient for routine maintenance. However, we also recommend
that a valve, elbow, or tee installed on the suction line should be no closer to the front of the
pump than seven times the suction line diameter.
5) Pump outlet piping system should be equipped with a check valve to prevent the pump
from the impact of medium recirculation and pump-stopping water hammer.
4.3 Valves and Fittings
1) Elbows should be no closer than 250mm to the inlet. Do not install 90° elbows directly into
the pump inlet/outlet. Joints must be tight.
Elbow
Return to pool Ø63mm
Suction Ø63mm
Figure 3
2) Flooded suction systems should have gate valves installed on suction and return line for
maintenance; however, the suction gate valve should be no closer than seven times the suc-
tion pipe diameter as described in this section.
3) Use a check valve in the return line where there is significant height between the return line
and the outlet of the pump.
4) Be sure to install a check valves when plumbing in parallel with other pumps. This helps
prevent reverse rotation of the impeller and motor.
4.4 Check before initial startup
1) Check whether pump shaft rotates freely;
2) Check whether power supply voltage and frequency conform to the nameplate;
3) Facing the fan blade, the direction of motor rotation should be clockwise;
4) It is forbidden to run the pump without water.
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