Maintenance - EBARA GSD Series Translation Of The Original Instructions

ATTENTION!
STOP THE MACHINE IN ALL CASES WHERE
THERE ARE OPERATING ANOMALIES, OR SIG-
NIFICANT CHANGES IN THE NOISE AND PER-
FORMANCE OF THE PUMP ITSELF (SEE CHAP-
TER 13 TROUBLESHOOTING)
10.4 PRECAUTIONS DURING OPERATION
1. Running the pump for a long time with the discharge valve closed
can cause damage to some of the pump components attributable to
internal overheating of the pump.
2. Too many starts and stops of the pump can cause damage. It is
advisable to limit starts, based on the following:
N ≤ 6 when P ≤ 7,5 kW
N ≤ 4 when 11 kW ≤ P ≤ 22 kW
N ≤ 3 when P>22 kW
N = starts/hour
P = motor power
10.5 PRECAUTIONS DURING MACHINE STOP
1. The pump body may shatter if the water inside freezes. Isolate the
pump or empty the pump as shown in the figure. Carry out this
operation even before any type of maintenance.
2. If you have spare pumps, you must run them regularly and keep
them ready, at any time, for possible operation.
3. When the pump is stopped for a long period of time, great care must
be taken to prevent any oxidation. In the case of the gasket, this can
go mouldy. To avoid this, remove the gasket, dry it and lubricate it
with grease, then refit it.

11. MAINTENANCE

MAINTENANCE OPERATIONS MUST BE CAR-
RIED OUT BY SPECIALIST PERSONNEL: AN
ERROR CAN CAUSE DAMAGE ATTRIBUTABLE
TO ELECTRIC SHOCKS, FIRES OR MALFUNC-
TIONS WHICH CAN RESULT IN AN ACCIDENT.
MAKE SURE THAT THE OPERATION SWITCH IS
DISCONNECTED AND CANNOT BE REACTIVAT-
ED INADVERTENTLY DURING MAINTENANCE
OPERATIONS; THE PUMP COULD START SUD-
DENLY IN CASE OF AUTOMATIC OPERATION.
RISK OF CRUSHING AND ELECTROCUTION.
BEFORE ANY INTERVENTION AND ESPECIAL-
LY WHEN PUMPING HIGH TEMPERATURE
FLUIDS, REMAIN AT A SAFE DISTANCE UNTIL
ALL THE COMPONENTS HAVE COOLED DOWN.
SIMILARLY, DO NOT TOUCH THE SURFACE OF
THE MOTOR WITHOUT MAKING SURE THAT
THE TEMPERATURE HAS DROPPED TO A TOL-
ERABLE VALUE.
BEFORE ANY MAINTENANCE OPERATION,
EQUIP YOURSELF WITH ALL THE NECESSARY
PROTECTION DEVICES REQUIRED BY LAW.
DANGER OF BURNS, CRUSHING AND EYE
DAMAGE.
ATTENTION!
ALSO BE CAREFUL NOT TO INTRODUCE OR
LEAVE MATERIAL INSIDE THE PUMP OR SYS-
TEM, EVEN SMALL ITEMS (E.G. NUTS, WASH-
ERS, ETC.). THESE COULD ALSO CAUSE SERI-
OUS DAMAGE TO THE MACHINE AND TO THE
SYSTEM ITSELF. INCORRECTLY PERFORMED
MAINTENANCE WORK WILL VOID THE WAR-
RANTY.
11.1 DAILY INSPECTION
1. Large variations in pressure, flow rate, absorption, vibrations or noi-
ses can be symptoms of a malfunctioning pump. Consult the table
"Faults and Measures to be taken". It is advisable to keep a daily log
of the operating conditions in order to quickly discover any symp-
toms that could lead to a potential fault.
2. During operation, the motor bearings must not have operating tem-
peratures exceeding 95°C. If this occurs, it is necessary to perform
suitable checks on the system, on the operating range and on the
pump.
3. If, during normal operation, there is a significant loss of water from
the mechanical seal, replace it immediately. If, instead, there is a sli-
ght leak, arrange for maintenance to check its condition and replace
if necessary. Always avoid dry running.
Permitted vibratory range (1/1000 mm)
RPM speed
4. The following figure shows the vibration values in normal system
conditions. Excessive vibration may be due to wear on the pump
components, problems in the system and connection pipes or loo-
sening of the pump fixings to the ground or base.
EN
11