EBARA EFQU4 - Manual (Page 16)

EBARA Fluid Handling 15
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.
WARNING!
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.
DANGER!
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 EBARA Fluid Handling.