IOM FS Iss 9; April 2012; ECR1269
Page 7 of 8
3
Operation
3.1
Flow Test Ranges
The Firesure flowmeter is designed to test that the automatic sprinkler installation meets the required flow rate
needs. Each size of flowmeter meets a particular duty as shown below.
Size
Flow Range
50
150-700
80
300-1600
100
500-3500
150
900-7900
200
2000-15000
3.2
Flow Testing and Reading
3.3
Fault Checking
Observation
Possible Causes
Remedy
No Flow Indication.
Bypass taps closed.
Restrictor clogged.
Connections reversed to flow.
Open Taps.
Press & release restrictor button or
remove and visually check
restrictor.
Check procedure.
Flow Indication Low.
Restrictor clogged.
Filter heavily clogged.
Air trapped in bypass.
Orifice carrier reverse installed
As above.
Remove and clean filter.
Bleed air from bypass.
Check flow direction against
carrier label arrow.
Open
1.
With bypass taps in closed position direct flow through
meter pipe line.
2.
Open bypass indicator taps.
3.
Bleed air from bypass by opening bleed assembly one
revolution.
4.
Close bleed assembly when air is bled.
5.
Press restrictor button full home and release.
6.
Flow rate is shown by aligning the top of the float with scale
markings. Test flows are highlighted on the scale.
7.
When test is completed, close bypass taps and drain by
opening drain assembly and bleed assembly one turn.
8.
Visually check filter bowl. If dirty, remove by unscrewing
fully and clean filter element.
9.
After draining close filter and bleed assemblies.
Closed
Open
Closed
Filter and Drain Assembly
Red Tap
White
Tap
6
