Gorman-Rupp Pumps V3A60-D914L3 1438800 and up - Manual (Page 21)

OM−06267 ULTRA V SERIES
OPERATION PAGE C − 5
Press 3 times and the LCD screen will display
Calibrate Zro". Press or until a character or
number on the display changes.
Press to accept the entry and advance to Cali-
brate Span".
Span Adjustment
Span adjustment calibrates the unit to a known wa-
ter pressure (depth). To set:
Submerge the transducer to an exact known
depth. At Calibrate Span", the span setting in the
unit’s memory will display. Press to increase or
to decrease the value unitl the LCD screen dis-
play equals the actual known depth of the trans-
ducer.
Level Adjustment
Level adjustment tells the unit when to turn the
pump on and off. To set:
From Level ABC" display, press once and
Pump Setpt A On" will display. Press to in-
crease or to decrease to the desired level at
which the pump turns on. Press to advance to
Pump Setpt A Off". Press to increase or to
decrease to the desired level at which the pump
turns off.
Press again to advance to Pump Setpt B On". If
B" is to be used, repeat the procedure described
above for adjusting level A".
Horn Delay
The horn delay is pre-set from the factory through
the engine control panel, therefore this function is
not utilized through the EPS.
OPERATION
A Gorman-Rupp automatic air release valve may
be installed in a bypass line, or the bypass line may
be left open.
A manual shut-off valve should not be
installed in any bypass line. A manual
shut-off valve may inadvertently be left
closed during operation. A pump which
has lost prime may continue to operate
without reaching prime, causing dan-
gerous overheating and possible explo-
sive rupture of the pump casing. Per-
sonnel could be severely injured.
Lines With a Bypass
If a Gorman-Rupp Automatic Air Release Valve has
been installed, the valve will automatically open to
allow the pump to prime, and automatically close
after priming is complete (see INSTALLATION for
Air Release Valve operation).
If the bypass line is open, air from the suction line
will be discharged through the bypass line back to
the wet well during the priming cycle. Liquid will
then continue to circulate through the bypass line
while the pump is in operation.
Lines Without a Bypass
Open all valves in the discharge line and start the
engine. Priming is indicated by a positive reading
on the discharge pressure gauge or by a quieter
operation. The pump may not prime immediately
because the suction line must first fill with liquid. If
the pump fails to prime within five minutes, stop it
and check the suction line for leaks.
After the pump has been primed, partially close the
discharge line throttling valve in order to fill the line
slowly and guard against excessive shock pres-
sure which could damage pipe ends, gaskets,
sprinkler heads, and any other fixtures connected
to the line. When the discharge line is completely
filled, adjust the throttling valve to the required flow
rate.
Leakage
No leakage should be visible at pump mating sur-
faces, or at pump connections or fittings. Keep all
line connections and fittings tight to maintain maxi-
mum pump efficiency.