REMS Multi-Push SL Notice D'utilisation page 16

eng
Greatest rated width of the pipe in the flushed
section, DN
Greatest rated width of the pipe in the flushed
section, in inches
Minimum volume flow with fully filled pipe
section, in l/min
Minimum number of DN 15 (½") tapping
points to be opened fully or a corresponding
cross-sectional area
Table 2: Recommended minimum flow and minimum number of tapping points
depending on the greatest rated diameter of the pipe in the flushed section
which must be opened for the flushing process (for a minimum flow velocity of
0.5 m/s)"
(EN 806-4:2010, lines in italics added, limiting to DN 50).
The manual actuation of the setting fittings for the supply of intermittent
compressed air described in EN 806-4:2010 and in the information leaflet T
84-2004 "Flushing, Disinfection and Commissioning of Drinking Water Instal-
lations" of the German Central Association for Sanitary, Heating and Air Condi-
tioning takes place automatically in REMS Multi-Push. The compressed air is
fed with an excess pressure of 0.5 bar above the measured water pressure.
The compressed air supply lasts 5 s, the stagnation phase (without compressed
air) lasts 2 s.
REMS Multi-Push displays the achieved flow velocity and the achieved volume
flow on the screen among other things.
Program sequence ↑ ↓ (8):
1. Flush \ Enter
2. Intermittent compressed air \ Enter
3. Check default max. DN according to table 2 and change if necessary
(11) \ ↓
4. Enter water volume of the flushing section VA H
5. Open the water supply. If the minimum flow velocity v H
minimum volume flow VS H
The flushing time (according to information leaflet T 84-2004 "Flushing,
Disinfection and Commissioning of Drinking Water Installations" of the
German Central Association for Sanitary, Heating and Air Conditioning)
depends on the pipe length and should not drop below 15 s per metre. The
flushing time must be at least 2 minutes per tapping point.
(If the defaults v H O and VS H
2
the cause, repeat the process)
6. Display screen: Water pressure (p H
flushing time (t H O), volume of used water (V H
2
\ Enter
7. Esc >> Start menu \ Memory Manager, data transfer >> 3.6
3.1.3. Flush with water/air mixture with constant compressed air program
The compressed air is fed continuously with an excess pressure of 0.5 bar
above the measured water pressure in this program. The compressed air pulses
in the program 3.1.2. flushing with water/air mixture with intermittent compressed
air" are omitted here. Although these considerably improve the cleaning effect,
they subject the pipes to greater stress. If there are any reservations about
the strength of the pipes to be flushed, this program at least achieves an
improvement of the cleaning effect in comparison with program 3.1.1. flushing
with water (without air supply)" by a jolt-free turbulence due to the constantly
fed compressed air.
REMS Multi-Push displays the used water volume on the screen among other
things.
Program sequence ↑ ↓ (8):
1. Flush \ Enter
2. Continuous air flow \ Enter
3. Check default max. DN according to table 2 and change if necessary
(11) \ ↓
4. Enter water volume of the flushing section VA H
5. Open the water supply. To exit \ Enter, (\ Esc = cancel)
6. Display screen: Water pressure (p H
volume (V H O) \ Enter
2
7. Esc >> Start menu \ Memory Manager, data transfer >> 3.6
3.3. Testing drinking water installations with compressed air program
WARNING
For Germany the information leaflet T 82-2011 "Leak Tests of Drinking Water
Installations with Compressed Air, Inert Gas or Water" of the German Central
Association for Sanitary, Heating and Air Conditioning defines the following for
the national regulations under "3.1 General":
"Due to the compressibility of gases, the rules for the prevention of accidents
"Working on Gas Systems" and the "Technical Rules for Gas Installations
DVGW-TRGI" must be observed for physical and safety reasons when conducting
pressure tests with air Therefore, the test pressures have been defined as
maximum 0.3 MPa/3 bar/43.5 psi, the same as for load and leak tests for gas
pipes, in agreement with the responsible industrial liability insurance associa-
tion and based on these rules. The national regulations are thereby fulfilled."
The respective national safety provisions, rules and regulations valid for
the application site must be considered and observed.
25 32 40
1" 1¼" 1½"
15 25 38
1 2 3
O (0-999 l) (11) \ Enter
2
O = 0,5 m/s, the
2
O and the flushing time are reached \ Enter
2
O are not reached: \ Esc = cancel, clarify
2
O), minimum flow velocity (v H
2
O), volume flow (VS H
2
O (0-999 l) (11) \ Enter
2
O), flushing time (t H O), used water
2 2
Before conducting a test with compressed air, it must be assessed whether the
50
installation to be tested will withstand the preset / selected test pressure "p
refer".
2"
Section 6. of EN 806-4:2010 defines among other things that: "Installations
inside buildings must be subjected to pressure testing. This can be done either
59
with water or, if national regulations allow, oil-free, clean air with low pressure
or inert gases may be used. The possible risk from high gas or air pressure in
the system must be considered." However, apart from this note, the standard
4
EN 806-4:2010 contains no test criteria whatsoever for testing with compressed
air.
The tests described below and the defaults stored in the REMS Multi-Push
correspond to the information leaflet T 82-2011 of the German Central Associ-
ation for Sanitary, Heating and Air Conditioning. Future changes to this infor-
mation leaflet or the respective valid provisions, rules and regulations for the
application site must be considered and changed test criteria (test sequences,
pressures and times) must be corrected in the defaults.
The programs can be aborted at any time with the Esc button (10). Then all
the valves open and the pressure in the installation is released. The tests are
saved but "Cancel" is shown in the file.
3.3.1. Leak test with compressed air (ZVSHK)
Test pressure 150 hPa (150 mbar)
Program sequence ↑ ↓ (8):
1. Test \ Enter
2. Test with compressed air \ Enter
3. Leak test \ Enter
4. Check reference test pressure default (p refer) and change if necessary
(11) \ ↓
5. Check stabilisation default (t stabi) and change if necessary (11) \ ↓
6. Check test time default (t test) and change if necessary (11) \ ↓
7. Actual test pressure (p actual) is adjusted to reference test pressure (p
refer) \ Enter
8. Stabilisation/wait time (t stabi) running, actual test pressure (p actual) is
changed to reference test pressure (p refer) on expiring. The stabilisation/
wait time can be ended prematurely with Enter, the test time (t test) then
begins immediately (\ Esc = cancel).
9. Display screen: Reference test pressure (p refer), actual test pressure (p
actual), differential test pressure (p diff), test time (t test) \ Enter
10. Esc >> Start menu \ Memory Manager, data transfer >> 3.6
3.3.2. Load test with compressed air ≤ DN 50 (ZVSHK)
Test pressure 0.3 MPa (3 bar)
O),
2
Program sequence ↑ ↓ (8):
O)
2
1. Test \ Enter
2. Test with compressed air \ Enter
3. Load test ≤ DN 50 \ Enter
See leak test 4. to 10. for further procedure
3.3.3. Load test with compressed air > DN 50 (ZVSHK)
Test pressure 0.1 MPa (1 bar)
Program sequence ↑ ↓ (8):
1. Test \ Enter
2. Test with compressed air \ Enter
3. Load test > DN 50 \ Enter
See leak test 4. to 10. for further procedure
3.4. Testing drinking water installations with water programs (only REMS
Multi-Push SLW)
Section 6.1 of EN 806-4:2010 offers 3 test methods A, B, C for hydrostatic
pressure testing depending on the material and size of the installed pipes. The
test methods differ in different test sequences, pressures and times.
For Germany, the information leaflet T 82-2011 "Leak Tests of Drinking Water
Installations with Compressed Air, Inert Gas or Water" of the German Central
Association for Sanitary, Heating and Air Conditioning, the following is defined
with regard to the test methods A, B, C for pressure testing with water offered
in section 6.1 of EN 806-4:2010: ""For reasons of practicability on the building
site, a modified method based on practical tests which can be used for all
materials and combinations of materials was chosen. The test time has been
extended in relation to the time specified in the standard to allow even the
slightest leaks to be detected. Test method B in accordance with DIN EN 806-4
is the basis for conducting the leak test with water for all materials." The following
is defined:
Leak testing with water can be conducted when
● changing of the water can be ensured at regular intervals, after seven days
at the latest, from the time of the leak test to commissioning of the drinking
water installation. Additionally when
● it is ensured that the house or building water connection is flushed and
therefore released for connection and operation,
● the pipe system is filled using totally hygienic components,
● the system remains full from the leak test to commissioning and partial
filling can be avoided.
WARNING
The hydro-pneumatic water pump installed additionally in the REMS Multi-Push
eng