EBARA EFQT3 - Manual (Page 16)

EBARA Fluid Handling 16
If rotation is incorrect on a three-phase
motor, have a qualified electrician
interchange any of the Phase wires to
change direction. If rotation is incorrect on a
single-phase motor, consult the literature
supplied with the motor for specific
instructions.
OPERATION
Lines with a Bypass
If an EBARA 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.
Lines without a Bypass
Open all valves in the discharge line and
start the power source. Priming is indicated
by a positive reading on the o 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 pressure 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.
Do not operate the pump against a closed
discharge throttling valve for long periods of
time. If operated against a closed discharge
throttling valve, pump components will
deteriorate, and the liquid could come to a
boil, build pressure, and cause the pump
casing to rupture or explode.
Leakage
No leakage should be visible at pump mating
surfaces, or at pump connections or fittings.
Keep all line connections and fittings tight to
maintain maximum pump efficiency.
Liquid Temperature and Overheating
The maximum liquid temperature for this
pump is 160º F (71º C). Do not apply it at a
higher operating 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 rupture 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
before servicing. Do not remove plates,
covers, gauges, or fittings from an
overheated pump. Liquid within the pump
can reach boiling temperatures, and
vapor 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
removing the casing drain plug. Use
caution when removing the plug to
prevent injury to personnel from hot
liquid.
As 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 overheating does occur, stop
the pump immediately and allow it to cool
before servicing it. Approach any overheated
pump cautiously. It is recommended that the
pressure relief valve assembly be replaced
at each overhaul, or any time the pump
casing overheats and activates the valve.
Never replace this valve with a substitute
which has not been specified or provided by
the EBARA.
WARNING!
DANGER!