Start-Up; Electrical Connections - FLYGT CH Serie Instrucciones De Instalacion Y Uso

5.3 Positioning
Install the pump allowing adequate clearance on the motor side (K value in the dimensional table in the
catalogue) for motor disassembly and inspection of the liquid end, without the need to disconnect the
pump body and the pipes.
5.4 Anchoring
The pump should be securely fastened to the base by bolts through the motor or pump feet.
5.5 Suction and delivery pipes (See fig. 1)
Install a non-return valve in the delivery pipe to protect the pump from excessive back pressures and re-
verse rotation. In any applications where the pump's delivery may be totally restricted we recommend fit-
ting a relief valve in the delivery pipe, or a recirculation bypass between the delivery side and the supply
tank.

6. Start-up

6.1 Electrical connections

WARNING
DANGER
RISK OF
ELECTRIC SHOCK
Connect the pump to the mains using a multiple-pole switch or other device ensuring multiple-pole di-
sconnection (interruption of all the supply wires) from the mains, with a contact separation of at least 3
mm.
Remove the terminal board cover by first removing the screws.
Carry out the connections as indicated on the back of the terminal board cover, and as shown in
fig. 3 - 4.
FIGURE 1
Correct installation
A = Eccentric reductions
B = Positive gradient
C = Good immersion
D = Large bends
E = Suction pipe diameter ≥ pump
port diameter
F = Suction lift depends on the pump
and installation (*). In normal conditions
this should not exceed 5-6 m.
G = The pipes should not weigh on the
pump, but on separated supports.
(*) Suction lift is determined based on liquid
temperature, flow resistance and NPSH
required by the pump.
Make sure that the rated voltage corresponds to the supply voltage.
Ground the pump before making any other connection.
We recommend that a high sensitivity differential switch (30 mA) be
installed as extra protection against lethal electric shocks in the event of
faulty grounding.
FIGURE 2
Incorrecte installation
1 = Sharp bend: high flow resistance
2 = Insufficient immersion: sucking air
3 = Negative gradient: air pockets
4 = Pipe diameter < pump port diameter:
high flow resistance.
en
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