BS EN 14055:2010 pdf download

BS EN 14055:2010 pdf download.WC and urinal flushing cisterns.
5.3 Test methods
5.3.1 General
The tests described are type tests (laboratory tests) and not quality control tests carned out during
manufacture.
5.32 Flush volume
5.3.2.1 General
The flush volume(s) shall be as specified in Table 3.
The flush volume(s) for one-piece and close-coupled cisterns supplied with a WC pan shall conform with the
value(s) specified by the manufacturer
5.3.2.2 Determination of the full flush volume
— Install the cistern on a firm flat horizontal or vertical surface as appropriate.
— Fill the flushing cistern via an inlet valve to the level indicated by the manufacturer.
— Shut off the supply.
— Operate the flushing mechanism control and collect the water delivered.
— Measure the volume using a calibrated contawier.
— Perform the test three times.
— If there are differences m the volumes delivered, calculate the arithmeftc mean for the three volumes.
— In the case of flushing cisterns that provide a choice of flush volumes, the test shall be repeated (or each
of these flush volumes.
5.3,2.3 Determination of the flush volum, for water-savIng devices
3.3.2.3.1 Double-action water-saving devices
— Fill the flushing cistern via an inlet valve to the level Indicated by the manufacturer.
— Shut oft the supply.
— Operate the flushing mechanism control and stop the flush after 1,5s whilst collecting the water delivered,
Measure the volume using a calibrated container.
— Perform the test three times.
— It there are differences ii the volumes delivered calculate the arithmetic mean (or the three volumes.
In the case of flushing cisterns that provKe different flush volumes, the test shall be repeated for each of these volumes
— Determine the water level 2 s after the water supply is shut-oft (critical water level).
– Record the meniscus level after stabilisation
5.3.5 Inlet valve opening characteristics
Fill the flushing cistern using an inlet valve with a supply presswe of 0.3 MPa (3 bar) to the level(s) indicated by the manufacturer.
— In the case of a double-action flushing cistern, stop the flush after (1.5 ± 02) sot in the case of a double- control cistern, operate the reduced flush control.
— Verify opening of the inlet valve and re-filling of the cistern to the level(s) indicated by the manufacturer.
5.3.6 Determination of dimension “c”
Fill the flushing cistern using en inlet valve to the highest water level indicated by the manufacturer. Measure dimension c” representing the safety margin (see Figure 8) between the maximum nominal water
level and the overflow level.
5.3.7 Determination of dImension “a”
Determine dimension ‘a” (see Figure 8) representing the distance between the lowest point of the inlet valve’s
air inlet orifice and the overflow level using the inlet valve manufacturers marking as specified in EN 14124.
5.3.8 Outlet valve leak tightness
— A flush pipe is not fitted for this test.
— Fill the flushing cistern to the water level indicated by the manufacturer In the case of flushing cisterns with adjustable levels, the minimum level shall be used.
— Actuate the flushing mechanism and allow the flushing cistern to fill again.
— Leave the flushing cistern for a period of 2 h.
— Wipe the outlet orifice dry.
PLace a piece of paper under the flushing cistern.
— Leave for 15 mm. Observe and record any watemiarks on the paper.
In the case of double-control mechanisms, the test is to be repeated using the reduced flush volume.
5.3.9 Outlet valve reliability test
5.3.9,1 Test apparatus
The test apparatus comprises:
— a flushing cistern which shall be filled through an inlet valve or an alternative filling device to accelerate the test;
One cycle consists of:
a) Fill the flushing cistern to the highest indicated water level indicated by the manufacturer.
b) Actuate the flush operating control by means of the automatic system.
c) Allow the mechanism to close again.
d) Re-till the flushing cistern.
a) In the case of single-flush dewces. Submit the cistern to 50 000 of these cycles (category I) or 200 000 of these cycles (category II),
f) In the case of double-control devices the test is carried out:
1) either with three reduced flushes followed by a full flush for a total of 50000 fhisties (category I) or
200 000 flushes (category II)
2) or with 37 500 reduced flushes fo’lowed by 12 500 fuN flushes (category I) or 150 000 reduced flushes followed by 50 000 full flushes (category II).
g) Record any failure or permanent distortion of the outlet valve dunng and at the end of the test
h) 2 h after completing the cycles, venfy the leakbghtness in accordance with 5.2,8,
5.3.10 Operating force
5.3.10.1 Test apparatus
Examples of typical test arrangements are shown in Figures 13 and 14.