Endress+Hauser Liquisys M CUM253 - Page 53

Liquisys M CUM223/253 Commissioning
Endress+Hauser 53
Chemoclean function
Just like the timer function, Chemoclean can also be used to start a cleaning cycle. However,
Chemoclean also gives you the added option of defining different cleaning and rinsing
intervals.
As a result, it is possible to clean irregularly with different repeat cycles and to separately set
the cleaning times with post rinse times.
Pay attention to the following:
• To use the Chemoclean function the transmitter has to be equipped with a designated
relay board (see product structure or chapter "accessories").
• Timer and Chemoclean do not work independently of one another. While one of the two
functions is active, the other cannot be started.
• For the Chemoclean function, the relays 3 (water) and 4 (cleaner) are used.
• If cleaning is prematurely aborted, a post rinse time always follows.
• If the setting is "Economy", cleaning only takes place with water.
a0006793
Fig. 30: Sequence of a cleaning cycle
A
B
C
0
1
Hold
Water
Cleaner
Contact on
Contact off
t
0
t
1
t
2
-t
1
t
3
-t
2
t
4
-t
3
t
5
-t
4
Normal mode
Cleaning start
Pre-rinse time
Cleaning time
Post rinse time
Hold dwell period
A
B
C
t
0
t
1
t
2
t
3
t
4
t
5
0
0
0
1
1
1