Gorman-Rupp Pumps T10A60S-6068T 1268074 and up - Manual (Page 22)

OM−05521 SUPER T SERIES
OPERATION PAGE C − 5
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.
Liquid Temperature And Overheating
The maximum liquid temperature for this pump is
160
_ F (71_ C). Do not apply it at a higher operat-
ing temperature.
Overheating can occur if operated with the valves
in the suction or discharge lines closed. Operating
against closed valves could bring the liquid to a
boil, build pressure, and cause the pump to rup-
ture or explode. If overheating occurs, stop the
pump and allow it to cool before servicing it. Refill
the pump casing with cool liquid.
Allow an over-heated pump to cool be-
fore servicing
. Do not remove plates,
covers, gauges, or fittings from an over-
heated pump. Liquid within the pump
can reach boiling temperatures, and va-
por pressure within the pump can cause
parts being disengaged to be ejected
with great force. After the pump cools,
drain the liquid from the pump by re-
moving the casing drain plug. Use cau-
tion when removing the plug to prevent
injury to personnel from hot liquid.
As a safeguard against rupture or explosion due to
heat, this pump is equipped with a pressure relief
valve which will open if vapor pressure within the
pump casing reaches a critical point. If over-heat-
ing does occur, stop the pump immediately and al-
low it to cool before servicing it. Approach any
over-heated pump cautiously. It is recom-
mended that the pressure relief valve assembly be