2.
Open valve in outside supply line until only liquid escapes from vent valves.
3.
Close the vent valves and then the outside supply line.
Suction Supply Below Pump - 3796
NOTICE:
The 3796 is a self priming pump and does not require manual priming prior to start-up (except
for the initial charge). However, in a pressurized system, the pump requires an air vent or a
permanent bypass line in the discharge piping to vent the evacuated air.
4.2.4 Other methods of priming:
1.
Priming by Ejector.
2.
Priming by Automatic Priming Pump.
4.2.5 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.
Running a new or rebuilt pump at slow speeds may not provide enough flow to adequately flush
and cool the stuffing box bushing's close running surfaces.
6.
Pumpage temperatures in excess of 200° F (93° C) will require warm-up of pump prior to opera-
tion. Circulate a small amount of pumpage through the pump until the casing temperature is with-
in 100° F (38° C) of the pumpage temperature and evenly heated.
NOTICE:
Warm-up rate should not exceed 1.4° C (5° F) per minute.
4.3 Starting pump
1.
Make sure suction valve and any recirculation or cooling lines are open.
2.
Fully close or partially open discharge valve as dictated by system conditions.
3.
Start Driver.
CAUTION:
Immediately observe pressure gauges. If discharge pressure is not quickly attained – stop driv-
er, reprime and attempt to restart.
Slowly open discharge valve until the desired flow is obtained.
4.3 Starting pump
3196CC Installation, Operation and Maintenance Instructions
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