Owner manual

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Cont ...
2.29 Non-Preferred Pump Location: The pump must be located with at least 1 metre
flooded suction at all times.
If it is not possible to locate the pump in the preferred area due to site limitations
and it is necessary to position the unit in the loft, or in a position above the
secondary tapping that feeds the pump, then there is an increased risk of air
locks. This risk must be eliminated.
The following method will help to overcome the problem:
In this application only use an Essex or Techflow side entry flange, then fit a “U”
bend or downward loop in the supply pipe to the pump of 350 mm depth before
rising to the pump should ensure the cylinder vents its air up the expansion pipe,
not up the pump feed (Fig. 6).
3 PUMP CONNECTIONS
3.11 Hose to pump: These pumps have G 1 threaded connections to accept the
hoses supplied. The hose end is made water tight with a sealing washer on
assembly, nip tight to 4/5 Nm for water tight seal (Do not overtighten).
3.12 Hose to pipework: Hoses terminating in G 1 threaded connections are supplied
and when securing the male end to a suitable pipe fitting, seal with PTFE tape or
other suitable sealant.
Max. inlet head 10 m Min. inlet head 1 m
350 mm min.
200 mm min.
Least preferred area
Fig. 6
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