Danfoss PCV-VFQ 21, Инструкция по эксплуатации

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1
2
Required
flow rate
Read rotations
for the adjusting throttle
3
DH-SMT/SI
VI.JA.G2.02
© Danfoss 11/2006
9
Instructions Pilot-controlled PCVQ DN 100 - DN 250 (PN 16, PN 25)
7.6 Flow Rate Adjustment
The setting of the setpoint for the flow rate
limitation is made by means of flow adjusting
curves (see section 7.7) or a heat meter (see
page 33).
Adjustment by means of flow adjusting
curves
Adjustment is to be made at a shut-down
system.
Procedure
4. Turn the adjusting throttle by this number of
rotations to the left.
1. Unscrew cover 1 .
2. Loosen the counter nut 2 .
3. Choose diagram,
(see section 7.7, Flow Adjusting Curves)
Observe effecitve pressure Δp
b
: 0.2 or 0.5 bar
see rating plate on the actuator AVP-F
5. The adjusted flow rate can be verified by
means of a flow rate measuring device.
Perhaps you need to re-adjust the flow rate.
Care for an adequate differential pressure in
the system.
6. Tighten the counter nut without changing the
position of the adjusting throttle.
7. Re-screw the cap nut 1 .
8. The cap nut can be sealed.
The flow rate adjustment is completed.
Now, adjust the differential pressure,
see section 7.8.
2. Screw.in the adjusting throttle 3 to its stop.
7 Start-up