Installation - Lowara SSV 30 Serie Instrucciones De Instalacion Y Uso

5. Installation

DANGER
Positioning
WARNING
DANGER
RISK OF
ELECTRIC SHOCK
Anchoring
The pump must be firmly secured by means of appropriate bolts to a concrete base or equivalent metal
structure (bracket or platform).
If you are installing a large pump near a residential area, you are advised to insulate it from the reinforced
concrete structure by means of vibration-damping supports or sections of anti-vibration piping on the
pump's suction and delivery ports.
The dimensions of the pump base and anchoring holes are shown in fig. 1, p. 110.
Suction and delivery pipes
Use pipes suitable for the maximum pump working pressure.
The suction pipe must be perfectly sealed and of suitable size for the suction conditions.
When the liquid level is lower than the pump, a foot valve must be fitted at the end of the suction pipe
(see diagrams 2A and 2B for correct hydraulic connection).
WARNING
Correct installation
A = Eccentric reductions
B = Positive gradient
C= Good immersion
D = Large bends
FIG.2A
E = Suction pipe diameter > pump port dia-
F = Difference in lift level referred to pump
G= The pipes should not weigh on the pump
(*) The difference in lift level must be determi-
ned according to liquid temperature, NPSH
and load loss.
For pump lifting and moving sling it safely.
Do not use the eyebolts on the motor, as they are not designed to bear the
weight of the unit.
– The pump should not be exposed to the weather or freezing temperatures.
– Make sure that there are no obstacles preventing normal flow of the cooling
air moved by the motor fan.
– The pump must be connected to an efficient grounding system in compli-
ance with local electrical regulations
– Ensure that the pump is disconnected from the mains before carrying out
any installation or maintenance operations.
For in-line open circuit pumps with delivery pipe discharging below the pumps,
a min. elevation of 300 mm and an air valve must be provided to prevent the
pump from disengaging after each stop (fig. 3).
The pipes must be secured independently of the pump to avoid stressing the
flanges.
meter
and installation (*). In optimum conditions
the difference in level should not exceed
5 – 6 m.
but on independent supports.
FIG.2B
Incorrect installation
1 = Sharp bend: high head loss
2 = Insufficient immersion: sucks air
3 = Negative gradient: air pockets
4 = Pipe diameter < pump port dia-
meter: high head loss
en
AIR VALVE
FIG. 3
19