Initial Start-Up - Mankenberg M Xtra Rp 840 Betriebsanleitung

7 Initial start-up

No fitting may be operated that does not have a sufficient pressure and temperature range
for the operating conditions – see Section 1 <Intended use> and markings on the fitting.
The manufacturer MANKENBERG should be consulted in the case of any applications out-
side of this range.
danger of
fatalities
Failure to observe this regulation may mean danger to life and limb and may cause
damage to the pressure-regulating valve.
The fitting is supplied with no tension on the spring – hence no defined operating pressure has been set
in the factory. During initial start-up, the valve must be adjusted to the system parameters. The adjusting
screw on the pilot valve should be tensioned for this purpose:
Clockwise rotation (when looking onto the adjusting screw) has the following effect:
•
on the pressure-reducing valve:
•
on the backpressure regulator:
The target value to be set by means of the adjusting screw shall be defined by the operator of the sys-
tem and must be calibrated with the aid of a pressure gauge on the plant side (or some other pressure
monitoring device).
When looking onto the adjusting screw:
Never fully remove the adjusting screw (by rotating it anticlockwise).
Do not block the adjusting screw in the position of maximum tension
caution
(when rotating it clockwise).
At the beginning of or shortly after the initial start-up, the sieve or the filter insert of any
installed strainer/filter should be cleaned in order to avoid blocking the strainer/filter.
danger
After the initial start-up:
Check the seals on screw-mounted parts of the body and reseal if necessary. If required, ask
MANKENBERG for the tightening torques.
caution
Observe the relevant notes in Section 10 <Troubleshooting help>.
To speed up the filling and emptying of the control chamber during start-up, restrictors D1, D2 and D3
should be fully opened. To vent the pressure-reducing valve, slightly undo the venting screw on the
restrictor assembly. Do not unscrew it completely. Tighten the venting screw again when no more air
comes out.
Restrictors D1, D2 and D3 are for adjusting the control valve to the operating conditions of the system.
Basic setting (factory-set):
- control restrictor D1 opened by approx. 1 revolution
- damping restrictors D2, D3 opened by approx. 2 revolutions
Never fully close the restrictors!
caution
the outlet pressure increases.
the inlet pressure increases.
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