Hydraulic Connections - BWT M.P.I. 100M Notice D'installation Et Conseils D'utilisation

4.

HYDRAULIC CONNECTIONS

The heat pump features two screw type unions to allow the entry and exit of the pool water. The water inlet and outlet
lines should be glued to these unions.
These unions should be connected to a filtration by-pass loop, equipped with two isolating valves (one on the inlet
and one on the outlet) to allow isolation of the machine should it need to be removed. A third valve should be installed
on the main line between the by-pass tapping points to allow regulation of the flow rate.
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 injecting
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 point 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, purge the circuit between the filter and the heat pump before connecting
the machine and starting filtration.
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2020/11 - Indice de révision : I - Code : 33340 CHAUFFAGE & DÉSHUMIDIFICATION