4.3 Pump start-up
WARNING:
•
Service temperature in an ATEX classified environment is limited to the area classification
specified on the ATEX tag affixed to the pump (reference
Table 2: Temperature class def-
•
The coupling used in an ATEX classified environment must be properly certified.
•
The coupling guard used in an ATEX classified environment must be constructed from a
non-sparking material.
4.4 Start-up precautions
•
All equipment and personal safety related devices and controls must be installed and operating
properly.
•
To prevent premature pump failure at initial start up due to dirt or debris in the pipe system, ensure
the system has been adequately cleaned and flushed.
•
Variable speed drivers should be brought to rated speed as quickly as possible
•
Variable speed drivers should not be adjusted or checked for speed governor or over speed trip
settings while coupled to the pump at initial start up. If settings have not been verified, uncouple the
unit and refer to driver manufacturer's instructions for assistance.
Pumpage temperatures in excess of 93°C | 200°F will require warmup of pump prior to operation.
Circulate a small amount of pumpage through the pump until the casing temperature is within 38°C |
100°F of the pumpage temperature and evenly heated.
CAUTION:
When starting the pump, immediately observe pressure gauges. If discharge pressure is not
quickly attained, stop driver, reprime and attempt to restart.
4.4.1 Bearing lubrication
Bearings must have adequate lubrication. Engage external lubrication system. Consult “Bearing section”
of these instructions for specific information.
4.4.2 Shaft rotation
The pump shaft must turn without any binding or rubbing. By manually turning the rotating element, only
the uniform frictional drag of the bearings and the stuffing box should be sensed.
CAUTION:
Serious damage may result if the pump is run in the wrong direction
4.4.3 Correct rotation of the driver
The direction of rotation of the driver must be checked before it can be coupled with the pump. The direc-
tion of rotation of the pump is indicated in a prominent location. For pumps with impellers threaded on
the shaft, reverse rotation would back the shaft from the impeller thread. Considerable damage may oc-
cur.
4.3 Pump start-up
Model JC Installation, Operation and Maintenance Instructions
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