Do not run the pump dry or against a
closed valve. Dry running will cause shaft
seal failure.
Do not exceed the temperature or
pressure limitations for the mechanical
shaft seal in use.
10.3 Maintaining the motor
It is important to keep the motor clean in order to
ensure adequate ventilation.
•
Check the motor at regular intervals.
•
If the pump is installed in a dusty environment,
check and clean it regularly.
10.4 Lubrication of motor bearings
10.4.1 MG motors
The bearings of motors up to 11 kW are greased for
life and require no lubrication.
The bearings of motors of 11 kW and up must be
greased in accordance with the indications on the
motor nameplate.
10.4.2 Siemens motors
Motors up to and including frame size 250 have
maintenance-free, greased-for-life bearings.
Motors of frame sizes larger than 250 must be
greased according to the indications on the motor
nameplate. Grease spills from the motor may occur.
10.4.3 Other motors
For other motor makes with grease nipples, lubricate
the motor according to the indications on the motor
nameplate. Grease specifications: See section
Bearing grease.
10.4.4 Bearing grease
The lithium-based grease used should meets the
following specifications:
•
NLGI class 2 or 3
•
viscosity of basic oil: 70 to 150 cSt at +40 °C
•
temperature range: -30 °C to +140 °C during
continuous operation.
10.5 Applying sealant to plugs
Remember to clean the threads and apply sealant to
the plug when assembling it.
11. Taking the product out of operation
11.1 Protecting the pump during periods of
inactivity and frost
Pumps that are not being used during periods of frost
must be drained to avoid damage.
WARNING
Escaping liquid
Death or serious personal injury
‐
Ensure that the escaping liquid does
not cause personal injury or damage to
the motor or other components.
‐
In hot-liquid installations, pay special
attention to the risk of personal injury
caused by scalding hot liquid.
‐
In cold-liquid installations, pay special
attention to the risk of personal injury
caused by cold liquid.
1. Drain the pump by removing the drain plug.
M
E
TM033935
Drain plug (E), priming and venting plug (M)
2. Do not tighten the priming plug or replace the
drain plug until the pump is to be used again.
3. If the pump is to be drained before a long period
of inactivity, inject a few drops of silicone oil on the
shaft at the bearing bracket. This will prevent the
shaft seal faces from seizing up.
35
English (GB)
Summary of Contents for NB 80-200/222VAXEF1BESBQQEWX2
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