Start-up
4990671000 February 2008
23
Start-up
5.
Start-up
5.1
Testing the system
The correct initial commissioning and start-up after ex-
tended standstill (more than 4 weeks) is essential for
the optimum function of the liquid ring pump.
We recommend that you allow adequate time to com-
mission the system. The liquid ring pump may be dam-
aged if the correct procedure is not followed.
Damage as a result of incorrect commissioning
is not covered by our warranty
!
Before start-up
•
Inspect the liquid ring pump (for damage in transit,
incorrect installation),
•
Inspect the drive guard and the safety guard on the
pressure side for damage,
•
Instruct the operators,
•
Instruct others who need to know the operation
and maintenance of the water ring pump,
•
Make certain that the rotor shaft can be rotated by
hand.
5.2
Operating liquid
Make certain of the following points to ensure that the
liquid ring pump is supplied with operating liquid:
•
Completely fill the operating water system, fill only
up to the maximum mark in the combined operat-
ing water and separating vessel.
•
Fill the liquid ring pump up to shaft centre, it may
be necessary to observe a closed automatic water
stop valve (also see chapter 6.2.4 "Operating the
liquid ring pump").
•
Check the function of the automatic water stop
valve.
•
Make sure that the pressure line is not blocked.
If sub-zero temperatures are likely, mix anti-
freeze as specified by the manufacturer (usu-
ally 33%). Alternatively drain the operating
water system completely if the machine is not
used.
5.3
Stop slide and shut-off valves
•
Inspect the installation direction of the non-return
valve (see arrowed direction)
•
Open all manual stop slide and shut-off valves.
Switch over the four-way directional control
valve to extreme position, an intermediate
position is not allowed.
(If the valve is set to an intermediate position,
the temperature of the operating water rises
and more water is lost.)
5.4
Direction of rotation
When starting the system for the first time, briefly
switch on the drive to check the rotation. Observe the
arrowed direction on the machine housing.
5.5
Drive
Switch on the drive and check if pressure or vacuum
are produced.
5.6
Check speed, vacuum and pressure
5.6.1
Speed
Permitted speed range: 1,100 to 1,500 min
-1
5.6.2
Vacuum and vacuum gauge
Permitted minimum suction pressure see nameplate
5.6.3
Pressure at pressure gauge
The maximum pressure indicated on the nameplate is
permitted (also see chapter 1.1 "Machine data").
Make certain that the safety valve blows off.