Maintenance; Possible Faults, Causes And Solutions; Technical Data - Espa NADORSELF 300 Manual De Instrucciones

5. MAINTENANCE

Under normal conditions these pumps require no
special or planned maintenance.
Clean the pump with a damp cloth without using
harsh products.
We recommend that in cold weather, when
there's risk of freezing, to completely drain
the pipes and pump body by removing the
drain plug.
If the pump is not to be operated for a long
period it is recommended to remove it from
the installation, drain down and store in a dry,
well ventilated place.
ATTENTION: In the event of faults or
damage occurring to the pump, repairs
should only be carried out by an authorised
service agent.
The Official Technical
www.espa.com.
When the pump is eventually disposed of, please
note that it contains no toxic or polluting material.
All main components are material identified to allow
selective disposal.
7. POSSIBLE FAULTS, CAUSES AND
SOLUTIONS
1) Pump does not prime.
2) Pump supplies scant flow.
3) Pump noisy.
4) Pump does not start.
5) Motor makes sound but does no start.
1 2 3 4 5 POSSIBLE PROBLEM
Air entry trough suction line
X X
Motor turning direction reversed
X X
Defective mechanical seal
X
Excessive suction height
X X
Incorrect voltage
X X X
Suctioning out of water
X
Diameter of suction line smaller than
X X
required
Incorrect pump attachment
X
Thermal relay tripped
X
Lack of power
X
X Motor blocked

8. TECHNICAL DATA

Liquid temperature: ......................... 4ºC - 40ºC
Ambient temperature: ..................... 0ºC - 40ºC
Storage temperature: ................... -10ºC - 50ºC
Services list is in
10
6. PLATE SHOWING CHARACTERISTICS
DESCRIPTION
1
Item reference
2
Voltage + frequency + item specifications
3
Flow
4 Pressure
5
Nominal voltage, no. stages, alternate current symbol and frequency
6 Energy efficiency index (Three-phase model)
6 Capacitor (Single-phase model)
7
EC mark + year of manufacture
8
Humidity protection level
9
Minimum working pressure
10
Maximum pressure
11
Pump serial no. (Fig.5)
12
Thermal protection incorporated indicator
13
Max. liquid temperature
14 Motor max. nominal output (P2)
15
Electric pump unit absorbed power(P1)
16
Designated motor insulation
17
Continuous operation symbol
18
Maximum nominal intensity at nominal voltage
19
Name and address of vendor responsible for the product
SOLUTIONS
Verify condition of connectors and gaskets of suction line
Reverse 2 phases of the supply
Change mechanical seal
Excessive suction height
Verify the voltage specified on the nameplate and that of
the mains
Set suction in correct position
Correctly dimension suction line
Attach pump correctly
Reset thermal relay
Reset the fuses
Remove the motor and call the Technical Service
Ambient relative humidity, max.: ............... 95%
Motor class I.
Other data see Figure 2.
EN