Technical information

IM-P343-29 CH Issue 548
9.6.5 T-UP - valve slow opening action
Programming notes
This function slows down the time taken for the valve to travel from 0 to 100%
lift. The time displayed is the fastest travel time measured during autostroke
(AUTOS). 4 seconds may be displayed if ACT is set to 'ON' (refer to Section
9.5.2, page 39).
Default value is the fastest time measured during autostroke.
Press and keys to alter the displayed value. Press key to accept the
displayed value and advance to time down (T-dWN).
Commissioning notes
The time displayed on start-up is the fastest time measured during autostroke
commissioning (AUTOS). A time cannot be set less than the minimum recorded during
autostroke. The value set will be the time taken for the valve to travel from 0 to 100% lift.
The time set will apply at all times and not just at start-up. This function is useful to prevent
the effects of system waterhammer, thermal shocks or slow down over-reactive systems
or the effects of oversized valves. Default is the fastest time measured during autostroke.
Maximum setting is 180 seconds.
9.6.6 T-dWN - valve slow closing action
Programming notes
This function slows down the time taken for the valve to travel from 100 to 0%
lift. The time displayed on start-up is the fastest travel time measured during
autostroke (
AUTOS). 4 seconds may be displayed if ACT is set to 'ON' (refer
to Section 9.5.2, page 39). Default value is the fastest time measured during
autostroke.
Press
and keys to alter the displayed value. Press key to accept the
displayed value and advance to travel switch 1 (TS1).
Commissioning notes
During autostroke routine the quickest time taken for the valve to fully close will be
measured and displayed. A time cannot be set less than the minimum recorded during
autostroke. The value set will be the time taken for the valve to travel from 100 to 0% lift.
This action will apply at all times and not just at start-up. This function is useful to prevent
the effects of system waterhammer, or to slow down over-reactive systems or the effects
of oversized valves. Default is the minimum time measured during autostroke. Maximum
setting is 180 seconds.