Stuart Turner PH 35 TS - Manual (Page 6)

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Cont ...
Pump Mounted Above Liquid Source (Suction Lift)
The pumps can be used in a suction lift installation providing the height of lift is within the
limits specified in the limits of application section.
A footvalve and strainer must always be used and the suction pipework size should be
22 mm throughout.
Lay the suction piping over the shortest possible distance and ensure there is a constant
rise from the liquid source to the pump. Any high spots will cause air pockets to form,
reducing system efficiency.
Ensure all joints in suction pipework are completely airtight. Failure to comply will result
in loss of prime.
The intake of the footvalve/strainer should be positioned such that is cannot be blocked
with debris or silt that are frequently found in the bottom of sumps and wells.
When a footvalve is installed on installations that incorporate automatic pump control,
it is recommended that a suitable pressure relief valve be fitted in the discharge (outlet)
pipework from the pump.
ELECTRICAL INSTALLATION / EARTHING
Regulations: The electrical installation must be carried out in accordance with the
current national electrical regulations and installed by a qualified person.
Safety: In the interests of electrical safety a 30 mA residual current device (R.C.D. not
supplied) should be installed in the supply circuit. This may be part of a consumer unit or a
separate unit.
Before starting work on the electrical supply ensure power supply is isolated.
DO NOT allow the supply cord to contact hot surfaces, including the motor shell, pump
body or pipework. The cord should be safely routed and secured by cable clips.
Adjacent pipes: Adjacent suction and delivery pipes should be fitted with earthing
clamps to BS 951 in accordance with current regulations (Fig. 9).
Earthing: This appliance must be earthed via the supply cord, which must be correctly
connected to the earth point located in the terminal box.
Pipework: Copper or metallic pipework must have supplementary earth bonding where
the continuity has been broken by flexible hoses or plastic components.
Additional earthing: Certain installations may require additional earthing arrangements
such as equipotential bonding. Reference should be made to the relevant regulations
concerning this subject to ensure compliance.
Connections: The pump must be permanently connected to the fixed wiring of the mains
supply using the factory fitted supply cord, via a double pole switched fused spur off the
ring main and
NOT connected to the boiler or the immersion heater circuits.
Fig. 3
Diagram of earth
continuity connection.