Download Micro-Master 4500 Plus User Guide Introduction Micro

Micro-Master 4500 Plus User Guide
Micro-Master 4500 Plus Filter Flush Timing Diagram
PD switch must be closed longer than
the Auto-Skip1 time before a Filter
Flush cycle will start. (This will mask out any
false filter cycles during pressure instability
during valve changes.
Controller ignores PD
input during PD Delay
PD
Input
At the End of a Filter Flush cycle,
The Controller will ignore and PD input
for the duration of Filter Cycle Delay
Interstation Delay (0-99secs)
PD Switch Delay
programmable
(0-99mins:99secs)
Any P.D. Switch closure
< Auto Skip1 time will
be ignored
Cycle Delay
Programmable
(0 to 99hrs:99mins)
Filter 1 Runtime
(0 to 99mins:99secs)
Filter
Stn. 1
Switch off Filter Stn 1 and
wait for interstation delay
before switching on Filter Stn. 2
To allow system to Stabilise
Filter
Stn. 2
Backup Delay
programmable
(0 to 99hrs:99mins)
Filter 2 Runtime
(0 to 99mins:99secs)
Backup Delay
Programmable (0-99hrs:99mins)
If NO P.D. input for the User
programmed Time, the Controller
will initiate a Filter Flush Cycle.
Time
3.2.6.2. Filter Cycle Delay – Minimum Time between Filter Flushing Cycles.
This is the delay time between filter back-flush cycles. It Acts in conjunction with the PD switch
and effectively delays a Pressure Differential induced flushing sequence for a period of time to
allow system stabilization after the completion of a back-flush Cycle. A typical minimum delay
would be 5 minutes when a PD switch is used.
3.2.6.3. P.D. Switch Backup Delay – Max. Time between Filter Flushing Cycles.
The Filter program has a background timer to actuate a filter program cycle if an unusually long
time has elapsed between a Pressure Differential initiated back-flush cycle. This guards against
filter overload in the event of PD switch failure.
3.2.6.4. Filter Inter-Station Delay – Time between each filter station operating.
This is the time delay between a filter station switching off and the next station switching on. A
time between 0 to 99 seconds may be entered. This allows time for the system to stabilize before
back-flushing the next filter.
To
Modem
PC
SERIAL
G
N
D
P
D
Connect N.O contacts of P.D switch across terminals P.D and Gnd. When no P.D Switch is
used, i.e. the filter cycle to be time only operation, the P.D. input must be linked to the GND
terminal as above.
14
Rev.0310