Watson-Marlow qdos H-FLO Reference Manual page 192

22.1.5 CHANGE MODE>Fluid recovery
The fluid recovery mode allows pump to operate in reverse to recover fluid from discharge line.
This is mainly used for maintenance purposes. The mode is feature of all models.
Fluid recovery can be undertaken as a manual operation or using analog signals (Universal, and
Universal+ models only). Pump will operate at reversed set speed proportional to 4-20 mA input
applied to configured pin.
Remote fluid recovery should not be used for bulk fluid transfer
22.1.5.1 Fluid recovery: Manual operation
1. Stop pump
Press MODE key, Use +/- keys to highlight
2.
3.
Press SELECT
4. An instruction is now displayed. There is a warning to ensure that your system design
permits reverse flow. If the flow path has unidirectional valves installed, then reverse
flow will not function and the pump will build up excessive pressure within the pipework
NOTICE
.
Fluid Recovery Menu
option
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