RDLO
Page 9 of 24
5.7 Coupling Guard
In compliance with the accident prevention
regulations the pump must not be operated without
a coupling guard. If the customer specifically
requests not to include a coupling guard in our
delivery, then the operator must supply one.
5.8 Final Check
Re-check the alignment of the pump set.
It must be easy to rotate the shaft by hand by
means of the coupling.
Check the integrity and proper functioning of all
connections.
6 Commissioning, Start-up/
Shutdown
Compliance with the following
requirements is of paramount
importance. Damage resulting
from non-compliance shall not be covered by the
scope of warranty.
6.1 Commissioning
Before starting up the pump make sure that the
following requirements have been checked and
fulfilled:
The pump has been firmly bolted to the
baseplate/foundation?
The coupling or pump unit have been aligned as
specified?
The pipes have been properly fitted?
The motor has been installed according to its
operating instructions?
The unit can be easily rotated by hand at the
coupling? (Carry out at least one full rotation)
The coupling guard has been fitted?
The staff have been informed about sources of
danger and measures to be taken to comply with
the accident prevention regulations?
The unit is protected against overload (appropriate
safety valve)?
The seals have been mounted correctly? (For gland
packings, see section 7.4, for mechanical seals,
see section 9.5 of these operating instructions).
Additional devices, if any, have been prepared and
fitted according to their operating instructions?
The rolling element bearings have been packed
with grease or (if applicable) the constant-level
oilers have been mounted and filled with oil? (See
section 7.2.3)
The pump has been vented as specified in section
6.3.?
6.2 Shaft Seal
Mechanical Seal
For putting the shaft seal into operation, refer to the
operating instructions of the mechanical seal in
section 9.5.
Gland Packing
Commission the pump with the gland no tighter than
finger-tight. A high, initial leakage rate – in keeping
with the medium pumped – is acceptable (approx.
50 to 200 drops per minute) until the packing
material has settled and become adjusted to the
working temperature (after approx. 30 minutes).
After running-in the packing material, reduce the
leakage rate to a very slight drip by tightening the
gland further carefully and evenly. Do not stop the
leakage altogether, as this would cause the gland
packing to become hot.
N. B.:
If the leakage is accompanied by a build-up of heat:
switch off the pump, if necessary. Let the pump cool
down (for approx. 10 to 15 minutes), then repeat the
start-up procedure. The required minimum leakage
rate depends on the pressure, slip velocity and
temperature of the medium pumped. It should be in
the range of approx. 10 to 120 drops per minute (20
drops of water correspond to approximately 1 ml).
6.3 Venting
Before start-up, the pump and the pipes must be
vented and primed with the liquid to be pumped. For
this purpose, use the vent plug or the vent valve
(option) at the top of the volute casing; in the case
of suction lift operation, the pump must be
evacuated additionally.
6.4 Commissioning
6.4.1 Checking the Direction of Rotation
For trouble-free operation of the
pump, the correct direction of
rotation of the impeller is of paramount importance.
If running in the wrong direction of rotation, the
Caution
Caution
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