The pipes, valves and unions constituting the by-pass loop should be made of high pressure (10 bar) PVC, diameter
50, glued. Allow the glue to dry properly before running water through the system.
In order to minimise the build-up of impurities in the filter and to minimise the risks of heat exchanger corrosion, the
by-pass tapping connections must be situated downstream from the filter and upstream of any system in-
jecting disinfectants or pH regulation chemicals into the pool water. The plant room throughwall flanges should
not be a source of vibration (noise), the PVC tubes should be fixed solidly in the walls or cushioned in a material that
absorbs vibrations.
Leave at least 1.5m of pipe between the by-pass return tapping connection and the point at which any chemicals are
injected. Injection of any chemicals must be slaved to filtration. Make sure that the system cannot accidentally
siphon chemicals from the chemical buffer tanks while filtration is not running.
Caution:
Be careful not to allow impurities (stones, earth, etc.) into the pipes. These could form obstructions in the titanium
heat exchanger on start-up. In all cases, drain the circuit between the filter and the heat pump before connecting
the machine and starting filtration.
2009/01 - Indice de révision : C - Code : 0033385
35/48