Control System
32
Service Manual – Scrubtec R 253 - RA40
System for Flow Rate Adjustment as Function of Speed
Solution flow levels 1, 2 and 3 regulate the flow of solution on the basis of the machine speed so as to keep the
quantity of solution dispensed per square metre of floor treated constant.
The reference flow level is level 3: based on the setting of the corresponding parameter P3, the opening time
of the solenoid valve (and of the detergent pump when fitted) is regulated so that the quantity of solution in
centiliters per metre travelled by the machine is constant and equal to the value set in the parameter
For example, for P3 = 3 0, the machine will dispense 3 centiliters of solution per metre travelled, which equates
(for the standard deck width of 530mm) to 5.7 centiliters per square metre of floor treated.
Levels 1 and 2 are defined via the corresponding parameters P1 and P2 as a % of level 3.
For example, for P1 = 25 and P2 = 50, P1 and P2 are respectively ¼ (25 %) and ½ (50 %) of the reference flow
rate P3
The default values (the same as in the example above) are summarized in the table, with the corresponding
flow rate values in liters per minute, dependent on machine speed, given as a reference.
Detergent flow (as a function of speed) (standard setting)
Level 1
Level 2
Level 3
Liters/minute @ 1 km/h
0.2
0.3
0.5
Liters/minute @ 3 km/h
0.4
0.8
1.5
Liters/minute @ 5 km/h
0.6
1.3
2.5
Centiliters per metre cleaned (constant)
0.75
1.5
3
Centiliters per meter
2
cleaned (Ø530 deck)
1.4
2.8
5.7
Level 4 (when enabled) is independent of any parameter and supplies the maximum possible quantity of solu-
tion as it keeps the solenoid valve of the supply system constantly open (with the brush rotating)
Detergent flow rate
Level 4
Liters/minute - Tank full
3.5
Liters/minute - Average
2.5
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