WARNING:
If pump becomes plugged, shut down pump and unplug prior to restarting.
CAUTION:
1.
Foreign objects in the pumped liquid or piping system can block the flow and cause ex-
cess heat generation, sparks and premature failure. Make sure that the pump and sys-
tems are free of foreign objects before and during operation.
2.
All equipment and personal safety related devices and controls must be installed and
operating properly.
3.
To prevent premature pump failure at initial start up due to dirt or debris in the pipe sys-
tem, ensure the system has been adequately cleaned and flushed.
4.
Variable speed drivers should be brought to rated speed as quickly as possible.
5.
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 manufacturers instructions for assistance.
6.
Pumpage tempertatures 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 tem-
perature is within 38°C | 100°F of the pumpage temperature and evenly heated.
When starting pump, immediately observe pressure gauges. If discharge pressure is
not quickly attained, stop driver, re-prime and attempt to restart.
7.
Never start the pump until it has been properly primed. Check the pump impeller for
submergence. The pump must be full of liquid with specified submergence head above
the impeller. Do not run the pump dry, as this might damage pump and seal compo-
nents.
8.
Lubricating liquid must be flowing to the stuffing box before pump is started.
Flush flows
Prior to starting pump, ensure all flush and cooling systems are operating.
Packing or mechanical seals are used to seal the rotating shaft. Generally, a clear liquid such as water is
used to lubricate and cool the sealing elements. The lubricating liquid pressure must be 10 -15 psi higher
than the pressure inside the elbow to prevent pumpage from entering the sealing elements. The lubricat-
ing liquid must be clean and free of grit. Shaft scoring, packing destruction, and mechanical seal face
damage will result from contaminated lubricant.
The stuffing box may be on the suction or the discharge side of the impeller, depending on the direction
of flow through the elbow ordered by the customer. If the pressure inside the elbow is unknown, it should
be measured with a pressure gauge when the pump is operating. The standard stuffing box is furnished
with (1) N.P.T. holes for piping the lubricating liquid. The lubricating liquid is piped into it. Some users
simply plug the other hole. For additional cooling of the sealing elements, an outlet pipe with a valve can
be installed to allow more liquid to flow through the stuffing box.
For special (6) row packing arrangement see appendix 1 at the end of this manual for flush pressures
and flow rates.
(Mechanical seals have no leakage and usually require a lubricant flow through the stuffing box for cool-
ing). The lubricating flow should be regulated by the valve in the outlet pipe rather than by throttling the
flow in the supply pipe.
Driver
Start driver.
5.2 Start the Pump
Model AF (42"/1200mm/54"/60"/66") LM/LMR Bearings Installation, Operation, and Maintenance Manual
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