If you set this option to on, each time the pump stops the F29 will prevent
the pump from restarting for the set period. The delay can be set from zero
to 99 hours 59 minutes in increments of 1 minute. Its uses include
preventing rapid cycling if the system’s air cell becomes water logged or if a
fault
d
evelops in a system’s external pressure switch. As an example of its
use,
c
onsider a pressure system filling a remote tank. If the tank has a float
valve that shuts when the tank is full, then the system will pressurise and
shut down each time the tank fills and the valve closes. If the float valve
leaks or the level drops and the valve opens the system will depressurise
and the pump would ordinarily start. Delayed restart will prevent the pump
from restarting for a set time.
AUTOSTART AFTER DELAY
If you choose yes to this question the F29 will automatically st
a
rt the pump
at the end of the delay period. If you choose no, the flow switch will only
start the pump after the delay if an external switch connected to the F29’s
remote input closes its contacts. In the example outlined above, consider
a tank that has intermittent or irregular draw off. You may choose to set the
d
e
layed restart to perhaps 12 hours. At the end of the 12 hour period the
pump will automatically start and if the tank level is low, the pump will run
continuously until the tank fills and the float valve in the tank closes.
The running of the batch can be initiated by powering up the F29 or by
pressing the
(R)
button. The batch run can also be initiated by the
closing of the contacts of a remote switch connected to the F29’s remote
input. To use the batch controller in this way, first set the remote input to
on and to start only. Each time the remote switch closes its contacts a
batch run will be initiated. If the remote switch contacts remain closed
the F29 simply runs for the set period and then shuts down. To initiate
another run the
r
emote switch contacts must first open and then re-
close. If flow is lost during a batch run the F29 will shut down the pump.
If flow subsequently resumes the batch controller will re-initiate its run
from the beginning. It will not resume running from the point in its
previous run that it shut down at. This function can be used in tank filling
applications to send a set volume of water to a tank but to terminate the
batch run when the tank fills.
DELAYED RESTARTING
28
