Xylem MPAI - Manual (Page 86)

Installation, Operating and Maintenance Instruction
Model MP, MPA, MPAI
MP 100-english page 82 Revision 04
Article No 771074011 Issue 11/2011
5.4 Drive
On selecting the motor size care has to be taken, that
the requirements acc. to ISO 5199 are fulfilled.
Note
the Operating Instructions of the motor
manufacturer.
On application in zone 1 and 2 a motor with
valid Atex-certification must be used.
5.5 Electric Connection
Electrical connection work may only be carried
out by an authorised professional. The rules
and regulations valid for electrical technology,
especially those concerned with safety
measures, must be observed. The regulations
of the national power supply companies
operating in that area must also be observed.
Before starting work, check that the information on the
motor name plate is the same as the local mains
network. The power supply cable of the coupled drive
motor must be connected up in accordance with the
wiring diagram produced by the motor manufacturer. A
protective motor switch must be provided.
In areas endangered to explosion IEC 60079-14
must additionally be noticed for the electric
installation.
Care must be taken that the base frame (2x
M10-thread available for earthing screws) is
earthed by means of corresponding measures.
The direction of rotation must only be checked
when the pump is full. Dry running will cause
damage to the pump.
5.6 Final Control
Check alignment of coupling acc. to chapter 5.3.1
again. It must be possible to turn the unit easily by
hand at the coupling.
6. Start-up, Operation, Shut down
The plant may only be started up by people who
are familiar with the local safety regulations and
with these Operating Instructions (especially
with the safety regulations and safety
instructions given here).
Hints for the use as boiler feed pump
Limits for cast iron when used in boiler feed or
condensate applications: pH-value ≥ 9,0 (optimum ≥
9,3), short term: pH-value ≥ 8,5.
The above stated values must be guarantied at the
suction side of the pump in any case.
The water treatment must be in acc. with the
specifications for water treatment of boiler feed water
in steam plants up to 64 bar.
Air traps in the system must be avoided in any case.
6.1 Initial start-up
Before starting up the pump, check, if the following
points were controlled and carried out:
The bearings are already filled with grease and
therefore ready for operation.
Pump and suction pipe must be filled completely
with liquid when starting up. Open the screwed
plugs "PM1" resp. "M2" when filling the pump.
Close them when water is flowing out.
Turn pump unit once again by hand and check
that it moves smoothly and evenly.
Check that coupling guard is installed and that all
safety devices are operational.
Switch on any sealing, flushing or cooling devices
that are provided. See Data Sheet for quantity and
pressure.
Open valve in suction /intake pipe.
Set the pressure-side slider to approx. 25% of the
pump rate for which the system was designed. For
pumps with a drive output lower than 30 kW, the
slider may also remain closed briefly upon startup.
Secure, that unit is electrically connected acc. to
all regulations and with all safety devices.
Check direction of rotation by switching on and off
briefly. It must be the same as the directional
arrow on the bearing frame.