Maintenance; Troubleshooting; Technical Data - Nilfisk-Advance Backflow Preventer Instructions For Use Manual

4. Maintenance

5. Disposal

6. Troubleshooting

7. Technical data

At least once a year, check the function
as follows:
1. After work, switch off the high
pressure cleaner.
2. Close the water tap valve.
3. Release the pressure in the supply
hose by triggering the spray pistol.
4. Dismount the backflow preventer.
Water has to come out of the drain
opening (max. 100ml) to ensure
separation of the potable water (c).
5. If this is not the case, contact your
Nilfisk representative.
Disposal of the backflow preventer
is according to local requirements.
Contact your local dealer or authorities
for further information.
Problem Cause
The backflow preventer • Pressure/flow is too low
does not open for water • The backflow preventer
flow
Release valve opens • The pressure is too low
without reason
Release valve stays open • Pressure too low
• Damaged content
The BA valve leaks when • The water hose is not
closing the pistol
The water volume through • The pressure loss when
the hose is too low.
The pressure in the hose • The hose is too short
is to high (leaks, bursts)
Weight
Dimensions (Max.)
Thread and hose length
Min. pressure during operation
Max. pressure (30 C/65 C)
o o
Max. operating temperature
Materials (House and valve gas-
kets)
Standards and norms
Adapted products
Accessories
Keep the backflow preventer clean, and
free of dirt.
Do not expose the backflow preventer
to frost.
See 7. Technical Data for further infor-
mation on materials.
Remedy
• Mount a hose of 10/12
is not mounted correctly
• Follow the instructions
• Check the water pressu-
• Check the backflow pre-
• If the backflow preventer
• Increase the length of
long enough
• The inlet water pressure
using a backflow pre-
venter is 0.6-0.7 bar
• Increase the length of
0.170g
55 x 95 x 155mm
• Up to 600 l/h ½ inch/10 meter
• Above 600 l/h 3/4 inches/12 meter
1.5 bars
10 bars/6 bars
65 C
o
• POM
• Stainless steel
• EPDM/NBR
- IEC/EN 60335-2-79 Amend.2.
- Construction according to EN 1717
High pressure cleaners and professional steam
cleaners
For unformations about couplings, filters and ho-
ses visit: http://www.nilfisk.com
BA VALVE
meters. The inlet water
pressure must be above
1.5 bars.
and mount the backflow
preventer correctly
re from the water tap
venter and the pressure
from the water tap
leaks it might be defect
the hose
must be above 1.5 bars.
the hose
2