Masdaf HEXA 1, Руководство по эксплуатации, Страница: 7 / 16

CAUTION
Do not start your pump dry (WITHOUT WATER).
• Fill water in pump in inverse pouring system.
Close the pump outlet valve, release air vent screw on the
pump head and open the inlet valve slowly until stable
water flows from the air vent screw. Then fasten the
screw.
• Fill water in pump when liquid level is lower than pump.
Before installing, pump and pipes must be filled with liquid
fully and air vented.
6.1. Check the rotary direction
Switch on the power supply and view the rotary direction
by viewing the motor fan. From the motor end, pump shall
run counter-clockwise.
6.2. Check before pump start-up
• Check whether the pump is fixed securely.
• Check whether pump is filled with water fully and check
whether liquid can flow freely.
• Check whether the voltage of power supply is stable.
• Check whether it turns correctly.
• To make sure all pipe lines are connected tightly and can
supply water normally.
• The valves in the inlet pipe line are completely opened.
• The outlet valve shall be opened slowly after the pump is
started up.
• Check the operation pressure if pressure meter is
installed.
• Check all the controls for normal operation. If the pump is
controlled by pressure switch, check and adjust the
starting pressure and stopping pressure. Check the full
load current to make sure it not surpasses the max
allowed current.
6.3. Frequency of pump starts
• Pump should not be started too frequently. It is suggest-
ed pump shall not be started more than 100 times per hour
if the motor power is less or equal to 4 kW. When motor
power is big than 4 kW, pump shall not be started more
than 20 times in one hour.
• Suggestion: When pump running; flow should be
controlled at the range of 0.5-1.3 times of rated flow.
• There should be no noise when pump running. If there is
something wrong, stop pump and check it and repair.
6.4. Frost protecting
Pump can be used in the system with anti-frozen
measures. If the pump is installed in easily frozen environ-
ment, suitable antifreeze shall be added to the transfer-
ring liquid to prevent pump from being damaged. If
antifreeze is not used, pump shall not be used during
periods of frost. Pump should be drained when stops
using.
6.5. The following should be checked regularly for pump.
• Pump working and operating pressure
• Possible leakage
• Possible motor overheat
• Cleaning/replacement of all strainers (If strainers fit)
• The switch off time of motor overload
• Frequency of starts and stops
• All control operation
If find faults, check system according to “Possible Failures,
Causes, and Solutions”
• Pump shall be cleaned and kept appropriately when it is
not used for a long time.
• Pump shall be prevented from being corrupted and
damaged in storage.
7. MAINTENANCE
CAUTION
Maintenance operations must be done by authorized
personnel with protective clothing only. The personnel
must also beware of high temperatures and harmful
and/or caustic liquids. Make sure that the personnel read
carefully the manual.
• The instructions in Safety Precautions must be executed
during maintenance and repair
• Continuous monitoring and maintenance will increase
the engine’s and pump’ s lives.
The instructions below should be applied.
7.1. The Checks During the Operation
• Pump must never be operated without water.
• Pump must not be operated for a long time with the
discharge valve closed (zero capacity).
• Bearing temperature must never exceed 80 ° C if the
ambient temperature is 30 ° C
• Precautions must be taken against flare up when the
component temperatures are over 60 ° C. “Hot Surface”
warnings must be placed over necessary areas.
• All the auxiliary systems must be in use while the pump is
operating.
• There is no need for excessive maintenance because of
using mechanical seal. Water leakage from the mechani-
cal sealing indicates the fact that the sealing is worn out
and therefore needs to be replaced.
• If the system consists of a substitute pump, keep it ready
by operating it once a week. Check also the auxiliary
systems of the substitute pump.
HEXA Series
7