Once the electrical housing has been removed, the paddle assembly can
be unscrewed from the pipework using the spanner flats on the body of the
paddle housing. Simply reverse this procedure to refit the electrical housing
to the controller, taking care to ensure the O-ring on the top of the paddle
assembly is in place and is clean and in good condition.
Under the end of the electrical housing on the IPG20 is a red hexagonal
dust cap. If you remove this dust cap you gain access to an adjustment
screw that allows the paddle preload to be reduced. As supplied the
sensitivity adjustment screw is wound fully in. In this position, the paddle
is at its least sensitive. In this position, it takes a substantial force from the
moving water to move the paddle. If you wind the sensitivity adjustment
screw anti-clockwise (outward) the force against the paddle that resists
flow will be reduced. The paddle will become increasingly more sensitive
and will respond to progressively lower flows the further out you wind the
adjusting screw. The total adjustment range is 10 turns of the screw. If you
wind the adjustment screw out beyond 10 turns there will not be enough
residual force to return the paddle to the off position when flow stops.
The range of sensitivity adjustment will also be affected by the orientation
of the controller. In horizontal pipework with the IPG20 mounted vertically
the useable range of adjustment is approximately 8 turns. In vertical
pipework with the IPG20 installed horizontally the full 10 turn range can be
utilised.
SENSITIVITY ADJUSTMENT
10
