Balancing The Circuits - Grundfos UPM3 Manuel D'installation Et D'utilisation

3. BALANCING AND SETTING THE SYSTEM 1. DESCRIZIONE DEI COMPONENTI

3.3 Balancing the circuits

3.3.1 Adjusting the lockshields (where applicable)
Fig. E
Proceed as follows to adjust them:
– Remove cap .
– Turn the cap upside down and, with its cavity manually turn (Fig. E) the
lockshield  until it is fully open, 4 turns max.
– Use a CH 4 hex spanner to tighten regulator  (Fig. F).
The lockshield is now ready to be set up:
– Loosen regulator  by the desired number of turns.
– Insert the cap again.
The cap can also be lead sealed in position using the holes in the
flaps  to secure it directly to the manifold, thereby preventing any
tampering.
26
Fig. F
Pressure drops
(Valve* + Lockshield)
1000
100
10
10
Portata / Flow rate / Caudal / Débit / Durchflussmenge / Portata / Расход
Q [l/h]
= No. of turns to open the flow-rate meter.
∆p = supply + return
TA: Fully open.
* Valve fully open
Kv values at different openings
(Valve* + Lockshield)
1,2
1
0,8
0,6
0,4
0,2
0
0 0,5
1
TA: Fully open.
The above values are obtained with water at 15°C
* Valve fully open
GB GB IT IT
0 Kv=0,05
0,5 Kv=0,10
1 Kv=0,26
1,5 kv=0,45
2 Kv=0,72
2,5 Kv=0,98
T.A. Kv=1,07
100 1000
(l/ h)
2,5 TA
1,5 2