Davey MaxiFlow SPA POOL PUMP - Manual (Page 5)

5
Installation
It is preferable to fit stop valves before and after the pump, this will enable the pump
to be removed for maintenance without having to drain the spa.
Most installations will have a filter of some description. If so it may be fitted on the
inlet side of the pump; however it is recommended that it be fitted on the outlet side
of the pump (pressure filter). If the filter is fitted on the inlet side it there is a distinct
possibility that the water lock will be lost and that the pump may fail to prime on
restart if an attempt is made to fit a cartridge type filter (on the inlet) it may result in
restricted water flow, premature cartridge failure and / or other problems. A cartridge
filter should be regarded as a pressure filter only.
Poor design of the spa (inlet/s too high), allowing air to enter on low water levels,
may also lead to this problem. Air in the system may lead to pump damage and / or
heater damage
Finally when installing any pool, spa or bath it is important to ensure that the pool,
spa or bath is clean and free of any particles. Leaves, pine needles, grit, scoria,
sand and other similar matter, if allowed to enter the pump, can cause considerable
internal damage particularly to the impeller. Such damage may lead to premature
failure of the pump and / or decreased performance of the pump. It may also
damage other components of the installation - heater, valves, etc that may be fitted.
If a pool with a salt-water chlorinator is being installed it would be normal practice to
seed the pool with a large amount of salt (sodium chloride). One might be tempted
to introduce the salt into the pool via the skim filter to ensure a good mix. This
practice should be avoided, as the salt particles are likely to damage the pump (they
may also damage the saline cell as well).
Location
The pump should be located as close to the water as practicable and mounted on
a firm base in a well drained position, high enough to prevent any flooding. It is the
installer’s/owners responsibility to locate the pump such that the nameplate can be
easily read and accessed for service.
Installation Diagram