Maintenance; Troubleshooting - Lowara e-SV Serie Manual Del Usuario

en - Translation of the original instructions
NOTICE:
• Never operate the pump below the minimum rated flow, when dry, or
without prime.
• Never operate the pump with the delivery ON-OFF valve closed for lon-
ger than a few seconds.
• Never operate the pump with the suction ON-OFF valve closed.
• To prevent overheating of the internal pump-components, make sure that
a minimum water flow is always guaranteed when the pump is running. If
this cannot be achieved, then a bypass or re-circulate line is recommen-
ded. Refer to the minimal nominal flow rate values given in the Appen-
dix.
• Do not expose an idle pump to freezing conditions. Drain all liquid that
is inside the pump. Failure to do so can cause liquid to freeze and damage
the pump.
• The sum of the pressure on the suction side (water mains, gravity tank)
and the maximum pressure that is delivered by the pump must not exceed
the maximum working pressure allowed (nominal pressure PN) for the
pump.
• Do not use the pump if cavitation occurs. Cavitation can damage the in-
ternal components.
• If you pump hot water, you must guarantee a minimum pressure on the
suction side to prevent cavitation.
Noise level
For information about noise levels emitted by units equipped with a Lowara
supplied motor, see Table 10.
5.1 Prime the pump
For information about plug placement, see Figure 15.
Installations with liquid level above the pump (suction head)
For an illustration that shows the pump parts, see Figure 16.
1. Close the on-off valve located downstream from the pump. Select the
applicable steps:
2. Series 1, 3, 5:
a) Loosen the drain plug pin (2).
b) Remove the fill and vent plug (1) and open the on-off valve up-
stream until the water flows out of the hole.
c) Tighten the drain plug pin (2).
d) Replace the fill and vent plug (1).
3. Series 10, 15, 22, 33, 46, 66, 92, 125:
a) Remove the fill and vent plug (1) and open the on/off valve up-
stream until the water flows out of the hole.
b) Close the fill and vent plug (1). Fill plug (3) can be used instead of
(1).
Installations with liquid level below the pump (suction lift)
For an illustration that shows the pump parts, see Figure 17.
1. Open the on-off valve located upstream from the pump and close the
on-off valve downstream. Select the applicable steps:
2. Series 1, 3, 5:
a) Loosen the drain plug pin (2).
b) Remove the fill and vent plug (1) and use a funnel to fill the pump
until water flows out of the hole.
c) Replace the fill and vent plug (1).
d) Tighten the drain plug pin (2).
3. Series 10, 15, 22, 33, 46, 66, 92, 125:
a) Remove the fill and vent plug (1) and use a funnel (4) to fill the
pump until water flows out of the hole.
b) Replace the fill and vent plug (1). Fill plug (3) can be used instead
of (1).
5.2 Check the rotation direction (three-phase
motor)
Follow this procedure before startup.
1. Locate the arrows on the adaptor or the motor fan cover to determine
the correct rotation direction.
2. Start the motor.
3. Quickly check the direction of rotation through the coupling guard or
through the motor fan cover.
4. Stop the motor.
5. If the rotation direction is incorrect, do as follows:
a) Disconnect the power supply.
b) In the terminal board of the motor or in the electric control panel,
exchange the position of two of the three wires of the supply ca-
ble.
For the wiring diagrams, see Figure 14.
c) Check the direction of rotation again.
14
5.3 Start the pump
Before starting the pump, make sure that:
• The pump is correctly connected to the power supply.
• The pump is correctly primed according to instruction in the Prime the
pump.
• The on-off valve located downstream from the pump is closed.
1. Start the motor.
2. Gradually open the on-off valve on the discharge side of the pump.
At the expected operating conditions, the pump must run smoothly
and quietly. If not, refer to Troubleshooting.

6 Maintenance

Precautions
WARNING:
Disconnect and lock out electrical power before installing or
servicing the pump.
WARNING:
• Maintenance and service must be performed by skilled and
qualified personnel only.
• Observe accident prevention regulations in force.
• Use suitable equipment and protection.
• Make sure that the drained liquid does not cause damage or
injuries.
6.1 Service
The pump does not require any scheduled routine maintenance. If the user
wishes to schedule regular maintenance deadlines, they are dependent on the
type of pumped liquid and on the operating conditions of the pump.
Contact the Sales and Service Department for any requests or information
regarding routine maintenance or service.
Extraordinary maintenance may be necessary to clean the liquid end and/or
replace worn parts.
6.2 Torque values
For information about torque values, see Table 18, Table 19, or Table 20.
For information about the applicable thrust and torques on the flanges by
the piping, see Figure 21.
6.3 Replace the electric motor
The pump is supplied with a calibrated fork-shaped shim designed to facili-
tate the motor coupling and replacement operations.
• See instructions about how to replace the motor in Figure 23.
If the calibrated fork-shaped shim is not available use a 5 ± 0.1 mm (0.2
± 0.004 in.) shim.
6.4 Replace the mechanical seal
Series Instruction
1, 3, 5 Contact the Sales and Service Department.
10, 15, 22: ≤ 4 kW Contact the Sales and Service Department.
10, 15, 22: > 4 kW See the instructions in Figure 24. Use alcohol for clean-
ing and lubrication.
33, 46, 66, 92, 125 See the instructions in Figure 24. Use alcohol for clean-
ing and lubrication.

7 Troubleshooting

7.1 Troubleshooting for users
The main switch is on, but the electric pump does not start.
Cause
The thermal protector incorpora-
ted in the pump (if any) has trip-
ped.
Remedy
Wait until the pump has cooled down.
The thermal protector will automati-
cally reset.
e-SV - English