32
Applications
• The “standard installation” type, when used with the ‘Latch on high unreachable’
setting provides Continuous Pressure Modulation by using the mechanical actuator
to control the PRV pilot valve. (i.e. Normally the latch solenoid valve is not activated).
In addition, during times when the inlet pressure is low (e.g. being marginally above
the target output pressure), control by using the pilot valve may introduce too great
a pressure drop to achieve the target pressure. The Pegasus2 detects this and can
activate the Latch circuit, as described above. This provides a small increase in the
output pressure.
When the inlet pressure improves (rises again), Pegasus2 also detects this,
de-activates the Latch circuit, and changes back to the regular control (modulating
the PRV pilot valve).
Note: Do not use the “Latch on low unreachable” setting with this configuration.
(If the latch circuit is triggered it can adversely affect the outlet water pressure).
Note: The two preceding diagrams show pressurised water being supplied from
tapping into the PRV inlet side. Where this pressure is excessive for Pegasus2
internal components, it is sometimes possible that it can be supplied from the
PRV outlet side (downstream pressure).
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