Stihl RE 521, Instruction Manual

Page: 54 / 284

RE 521, RE 551 PLUS, RE 581, RE 581 PLUS
English
52
N
Unscrew cap from detergent
container
N
Fill detergent tank with STIHL
detergent diluted as specified –
STIHL recommends using STIHL
detergent
N
Screw cover with intake hose onto
detergent container
The cap has a standard thread and fits
all standard detergent containers.
N
Use the detergent metering knob to
adjust the amount of detergent to be
added – as shown in picture
N
When applying detergent, start at
the bottom and work upwards
To achieve a better result, spray the
detergent on the dry surface and let it sit
for a few minutes.
Detergent must not be allowed to dry on
the object to be cleaned.
Rinse detergent system
If detergent is no longer to be added:
N
Turn the detergent metering knob to
the left as far as it will go to
0 % (min)
N
Let the high-pressure cleaner
continue to run with the spray gun
open until no more detergent comes
out of the nozzle
Precisely calculating/setting the
detergent concentration
For a few detergents, the concentration
must be very precisely set. In this case,
measure the water flow and detergent
consumption.
N
Set the detergent metering knob to
"0" % (min)
N
Hold the spray gun in a suitable
empty receptacle (> 20 l) and
actuate for exactly 1 minute
N
Measure the quantity of water "Q" in
the container
N
Fill 2 liters of detergent diluted as
directed into a suitable container
(with a scale of 0.1 l) – STIHL
recommends the use of genuine
STIHL detergents
N
Hold the intake hose in the
container
N
Set the detergent metering knob to
the desired concentration: 0 %
(min) to 5 % (max)
N
Hold the spray gun in a suitable
empty receptacle (> 20 l) and
actuate for exactly 1 minute
N
Read the detergent consumption
"QR" on the scale
Calculating the actual detergent
concentration:
–
QR = amount of consumed
detergent (in l/min)
–
Q = Water without detergent
(in l/min)
–
V = Predilution of detergent (in %)
If the actual concentration deviates from
the desired concentration, reset knob
and repeat measurement if necessary.
Calculating the predilution of the
detergent in %
If the predilution is not indicated as a
percentage, it can be calculated using
the following table:
Adding detergent
Detergent metering knob
to the left: 0 % (min)
Detergent metering knob
to the right: 5 % (max)
QR
x V = concentration
Q
Ratio
1:1
= 50 %
1:2 = 33.3 %
1:3 = 25 %
1:5 = 16.6 %
1:10 = 9 %