Gorman-Rupp Pumps 82E1-L100EE-X 1215875 thru 1518663 - Manual (Page 12)

80 SERIES OM−05132
PAGE B − 5 INSTALLATION
With high discharge heads, it is recommended that
a throttling valve and a system check valve be in-
stalled in the discharge line to protect the pump
from excessive shock pressure and reverse rota-
tion when it is stopped.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
Bypass Lines
If a system check valve is used due to high dis-
charge head, it may be necessary to vent trapped
air from the top of the pump during the priming
process. This may be accomplished by installing a
bypass line from the top of the pump, back to the
source of liquid. The end of the bypass line must be
submerged. The line must be large enough to pre-
vent clogging, but not so large as to affect pump
discharge capacity.
GROUNDING
To eliminate electrostatic build-up by the liquid be-
ing pumped, the unit must be grounded by attach-
ing the ground wire assembly to a ground rod.
Install the ground rod in accordance with the Na-
tional Electrical Codes and all local codes. Be sure
the clamp or fastener has made a tight electrical
connection with the rod.
Inspect and test the ground wire assembly
for conductivity. Replace broken or frayed
wire before resuming operation.