Pentair Siata V132 SFE, Installer Manual

Page: 75 / 88

Installer manual Siata V132 - SFE - Troubleshooting
Ref. MKT-IM-003 / B - 19.04.2017 75 / 88
Leaks to the drain
during service or
when in stand-by.
Leak through the piston /seals and
spacer system.
If the water leaking from the drain is
softened check for damages on the
outlet part of the valve, in particular
outlet piston or seals and spacers.
Otherwise check for damages on the
inlet part of the valve.
Dismount the pistons and the seals
and spacer pack. Visually check every
items inside the valve and replace the
damaged part. If more that a third of
the total O-rings needs to be replaced,
change the complete piston and seals
and spacers sub-assembly.
Hard water
detected in the
outlet.
Probable leakage between inlet and
outlet or between the valve and tank
seal.
A Damage on the inlet internals O-
ring (
1 ) and ( 2 ) or on the inlet
piston. Dismount the valve and
visually check these items.
Replace them if they are damaged.
B The rise pipe O-ring may be
damaged, disconnect the valve
from the tank and check the O-ring
status.
High pressure drop is causing the
opening of the automatic bypass.
If mixing is not desired replace the
automatic bypass with a manual
bypass model.
Inlet piston is out of position causing
bypass between inlet and outlet.
In that case a leakage on the drain
should also be observed. Check for
problems on the pilot circuit otherwise
check if the pilot pressure is in
compliance with the valve
specifications. For twin pilot valves,
the screen inside the manifold may be
plugged by dirt causing pressure drop
on the pilot circuit. Remove and clean
it.
Bypass valve not closed. Ensure that the bypass valve is closed.
Issue Cause Reset and recovery