Commissioning/Shut-Down; Commissioning; Safety Precautions; Start-Up - RITZ Series RITZBloc Betriebsanleitung

Series RITZBloc
3.3.5 Pressure tests
• Observe the relevant directives.
• Adhere to permitted nominal pressure levels for individual
components.
• Consider the overlapping of pump pressures at pumps in-
stalled in series.
3.3.6 Auxiliary pipe connections
Sealing and flushing media:
• Connect the pipes.
• Install a regulating valve and a magnet valve (closed without
current).
• Blocking and flushing pressure must be at least 0.5 bar above
the maximum pressure of the pump.
• Set the amounts of blocking and flushing media with the reg-
ulating valve.
Quench media:
• Discharge media without pressure into the quench chamber.

4. Commissioning/shut-down

4.1

Commissioning

Before switching on the pump ensure that the following points
have been checked and carried out:
• Check that the fastening bolts of pump and motor are secure.
• Check that the installation of the pump ensures easy access
to the functional controls.
• Check the non-return valve of pump on its tightness.
4.1.1 Shaft sealing
Observe any specific instructions, cross-sections, dimension
sheets or appendices.
For pumps with a single mechanical seal with quench arrange-
ment and quench reservoir: Depending on the liquid to be
pumped the quench reservoir should be filled to half its capacity
with water or other liquid.
4.1.2 Filling and venting
• Close the discharge isolation valve and, if fitted, open the inlet
isolating valve.
• Fill the pump with the liquid to be pumped, and totally vent. If
arranged for operation on a suction lift then use a filling funnel
or pipe.
• If vent screws are present on the suction or pressure side of
the casing, open them to let air escape.
• In case of filled discharge pipe, the pump can be filled through
the delivery non-return valve by-pass or lifting lever (if fitted).
• Turn the pump shaft several times by hand. The pump is
vented when air bubbles no longer escape from the vent
holes.
• Fill the auxiliary valves for sealing and flushing media with
water and purge the system of any air. Close the screw plugs
and the vent plugs.
• Pumps fitted with mechanical seal: Open the vent plugs of
the seal cavity (where fitted). Fill the seal cavity with water
and purge the system of air.
• Pumps fitted with mechanical seal and quick aerator:
Loosen sealing cap of air intake catch before commissioning
(approx. 2 turns). Do not remove cap completely to avoid dirt
penetration.
• Before starting check the seal cavity for trapped air. The seal
may be seriously damaged by dry running! After checking, re-
place the plugs.
• Function of a mechanical seal: Two slide faces rub against
each other and are lubricated by a liquid film at the same time.
In the case of single-action mechanical seals, the film is
formed by a pumping medium. A leakage of between 0.2 and
5 ml/h is possible depending on running smoothness, pres-
sure, rotational speed and shaft diameter (mechanical seals
are wearing parts for which no guarantee can be given).
4.1.3 Electrical connections
Electrical installations may only be carried out by
qualified personnel in compliance with IEEE Regula-
tions and Statutory Requirements.
• The motor must be provided with motor protection switch.
• The electricity supply and frequency provided must match the
motor nameplate details.
• The motor terminal links must be positioned to suit the supply
and the proposed starting arrangement.
4.1.4 Checking the direction of rotation
The direction of rotation has to be conform with with direction of
rotation arrow on the pump. Use rotary field meter. If not avail-
able, the motor, with pump filled, can also be shortly switched-
off and immediately stopped.
If the rotation has to be reversed, then arrange for this to be car-
ried out by an electrician.
Do not run pump counter to its given operation direction (direc-
tion arrow on casing).
4.2

Safety precautions

Do not operate the pump set before fixing guards for
moving parts such as the coupling etc. If guards are
not delivered with pump then they must be provided
by the installer before operation. Do not reach under
guards with hands!
4.3

Start-up

4.3.1 Initial start-up/restarting
• Start the pump only if it is fully primed and when there is dis-
charge system pressure.
• Open the sealing and flushing valves.
• If the discharge pipework is empty:
- Close the delivery isolating valve completely before open-
ing it slightly.
- Start the pump.
- Observe the delivery pressure gauge and motor ammeter
and gradually open the discharge valve as the system
pressure increases. Take care to open the valve slowly
and not too wide.
17