WARNUNG:
The coupling guard used in an ATEX classified environment must be constructed from a
non-sparking material.
WARNUNG:
Never operate a pump without coupling guard properly installed. Refer to Appendix II for
coupling guard installation instructions. Personal injury will occur if pump is run without
coupling guard.
8.
Priming - Never start the pump until it has been properly primed. Several different methods of
priming can be used, depending upon type of installation and service involved.
WARNUNG:
Pumps must be fully primed at all times during operation.
Suction Supply Above Pump
1.
Slowly open the suction valve.
2.
Open air vents on the suction and discharge piping, casing, seal chamber, and seal
piping, if provided, until all air is vented and only liquid flows out.
3.
Close the vents
Suction Supply Below Pump
A foot valve and outside source of liquid may be used to prime the pump. Outside source of
liquid can come from a priming pump, pressurized discharge line, or other supply.
1.
Close discharge valve and open air vents in suction and discharge piping, casing,
seal chamber and seal piping, if provided.
2.
Open valve in outside supply line until all air is vented and only liquid flows out.
WARNUNG:
When handling hazardous and/or toxic fluids, proper personal protective equipment is re-
quired. If pump is being drained, precautions must be taken to prevent physical injury.
Pumpage must be handled and disposed of in conformance with applicable regulations.
3.
Close the vents and then the outside supply line.
Other Methods of Priming Pump
•
Priming by ejector.
•
Priming by automatic priming pump.
4.2 Start-Up Precautions
1.
All equipment and personal safety related devices and controls must be installed and operating
properly.
2.
To prevent premature pump failure at initial start-up due to dirt or debris in the pipe system, en-
sure the pump can be run continuously at full speed and flow for 2 to 3 hours.
3.
Variable speed drivers should be brought to rated speed as quickly as possible.
4.
Variable speed drivers should not be adjusted or checked for speed governor or overspeed 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.
5.
Pumpage temperatures in excess of 93° C (200° F) will require warm-up of pump prior to opera-
tion. Circulate a small amount of pumpage through the pump until the casing temperature is wit-
hin 38° C (100° F) of the pumpage temperature and evenly heated.
4.2 Start-Up Precautions
28
3996 Installation, Operation and Maintenance Instructions
