Grundfos UPM3 Manuel D'installation Et D'utilisation page 27

3. BALANCING AND SETTING THE SYSTEM 1. DESCRIZIONE DEI COMPONENTI
3.3.2 Lockshield adjustment with built-in
flow-rate meter (if there is one)
1 2
Measurement range: 0-4 l/min
Maximum operating pressure: 6 bar
Max. operating temperature: 90°C
Kv = 0.15 (1 l/min) - 0.55 (4 l/min)
Kv max (out of measurement range) = 0.9
Accuracy: ±10% fs
fs = End of scale
The adjustment is carried out as follows:
1. Manually turn ring nut , anticlockwise until the lockshield is fully open
(max 4 turns).
2. Lower ring nut  and calibrate using regulator  until you reach the
correct flow rate (indicated directly on the meter).
3. Lift ring nut  until you hear it clicks, which means it has been positioned
correctly.
PLEASE NOTE: All the steps above must be carried out manually.
It is also possible to lead seal the collar in the reached position, using the
holes in flaps  to fasten it:
– directly to the manifold, thus preventing any tampering
– to the meter, leaving the possibility to shut-off the way without modifying
the set maximum opening calibration.
Cleaning of the glass
– Turn ring nut  clockwise until the lockshield is completely closed
– Remove the glass slide by unscrewing it from regulator  with the CH17
box spanner(*).
– Clean the glass slide and screw it back onto regulator .
– Turn ring nut  anticlockwise until the lockshield is fully open (max
4 turns).
Graph with flow-rate meter pressure drops (0÷4 l/min)
*
3
= No. of turns to open the flow-rate meter
Graph with pressure drops (0÷4 l/min) of the flow-rate meter in
the fully open position
300
250
200
150
100
TA Regulator fully open
LP Meter limit
Q [l/h]
50
0
0 60 120 180
Q [l/h]
GB GB IT IT
LP
TA
240 300 360
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