Pentair ONGA FARMMASTER JJ Series, Руководство пользователя

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9
Piping
All pipe threads should be tightened correctly to prevent leaks. An air leak in
the suction pipe will prevent the pump from operating. Galvanised or poly-
thene pipe can be used. For correctly sized pipe refer to pipe friction tables.
Always use suction pipe that is the same size or larger than the pump suc-
tion port. For long suction or discharge lines, increase pipe size appropri-
ately to minimise friction loss.
Installation (continued)
NOTICE: Use Teflon tape for making all threaded connections to the
pump. Do not use pipe dope (glue) as this will cause stress fractures in the
pump.
Deep Well
The correct grade of polythene pipe should be used. Use teflon tape on all
threaded joints as air leaks will prevent the pump from operating.
When installing the injector, cut pipes so that the pressure line and the
suction line lay straight, side by side. Adequate heating of the pipe makes
it easy to push on the barbed injector fittings. Use two stainless steel hose
clamps per fitting to ensure that under load the pipes do not come free.
Teflon Taping Instructions:
Use only new or clean PVC or galvanised pipe fittings.
Wrap male pipe threads with one to two layers (or a sufficient number of
layers) of Teflon tape. Cover entire threaded portion.
Do not overtighten.
If leaks occur, remove pipe, clean off old tape, rewrap as previously with
one to two additional layers of tape and remake the connection.
NOTICE: Support all piping connected with pump.
To avoid stress on the pump, support both suction and discharge pipes
independently. Place these supports as close to the pump as possible.
To avoid a strain left by a gap at the last connection, start all piping at the
pump and run pipe
away from the pump.
Never use a suction pipe smaller than pump suction connection.
To avoid airlocking, slope suction pipe slightly upward toward the pump.
NOTICE: To prevent flooding when removing pump for service, all flooded
suction systems must have shut-off valves in suction and discharge
pipes.