Ebara EVM 32 7-3F5/15 [12/107] Demolition

Ebara EVM 10 6N5/2,2 [12/107] Demolition
12
TROUBLE
ENCOUNTERED
CAUSE REMEDY
When the switch
closes, the pump
does not manage
to complete
even one turn or
struggles to turn
the odd half turn
before the circuit
breaker trips or
fuses blow
Motor
short-circuited
Check and
replace
Call a
specialized
electrician
Short-circuit
due to incor-
rect connec-
tion
Check and
reconnect
correctly
Residual current
circuit breaker
trips as soon as
switch closes
Leakage
current owing
to damaged
insulation of
motor, cables
or other
electric com-
ponents
Check and re-
place electric
component
with ground
fault
Pump performs
a few turns in op-
posite direction
when stopping
Foot valve
leaking
Check, clean or replace
Suction pipe
leaking
Check and repair
Pump vibrates
and is unusually
noisy
Motor bearin-
gs worn
Replace bearings
Foreign matter
between xed
and rotating
parts
Disassemble
and clean
pump
Call our nea-
rest Servicing
Department
to do the job
Pump opera-
tion affected
by cavitation
Reduce ow rate by throttling
delivery line. If cavitation persi-
sts, check:
- Suction height
- Pressure loss along suction
line (diameter of pipe, elbows
etc.)
- Liquid temperature
- Delivery line backpressure
11. DEMOLITION
See sect. 11 in part 1 of the manual.
12.
TECHNICAL DOCUMENTATION SUPPLIED (DIAGRAMS,
TABLES, DRAWINGS, TECHNICAL NOTES)
12.1. MOTOR OUTPUT REDUCTION FACTORS
When the motor-driven pump is installed in a site where
the ambient temperature is higher than 40°C and/or its al-
titude is over 1000 m above sea level, the motor’s output
decreases.
The table attached features the reduction factors based
on temperature and altitude. To prevent overheating, you
must replace the motor with a different version whose rated
output multiplied by the factor corresponding to the tem-
perature and altitude is greater than or equal to that of the
standard motor.
The standard motor can only be used if the relevant applica-
tion can accept a reduction in ow rate, achieved by throt-
tling the delivery line so as to reduce the current absorbed
by an amount equal to the correction factor.
Altitude
(m)
Temperature °C
0
10 20 30 40 45 50 55 60
0 0.95 0.90 0.85 0.80
500 0.95 0.90 0.85 0.80
1000 0.95 0.90 0.85 0.80
1500 0.97 0.97 0.97 0.97 0.97 0.92 0.87 0.82 0.78
2000 0.95 0.95 0.95 0.95 0.95 0.90 0.85 0.80 0.76
12.2. POSITIONING OF HOLES FOR FASTENING DOWN
Pump
model
Hole
diameter
mm
Hole centre-to-centre
distance side in line
with ports
mm
Hole centre-to-centre
distance side
crosswise to ports
mm
EVM3
12
100 180
EVM5
EVM10
130 215
EVM18
EVM32
14
170 240
EVM45
190 266
EVM64
12.3. EVM PUMP MAXIMUM WORKING PRESSURE CHART
Maximum
working
pressure
Pump model
EVM3 EVM5 EVM10 EVM18
Hz
50 60 50 60 50 60 50 60
1.6
2-15 2-9 2-16 2-10 2-14 2-8 2-6 1-6
2.5
18-26 11-18 18-24 11-19 15-22 10-16 7-16 7-12
Maximum
working
pressure
Pump model
EVM32 EVM45 EVM64
Hz
50 60 50 60 50 60
1.6
1-7 1-5 1-6 1-4 1-6 1-4
2.5
8-12 6-8 7-9 5-6 6-7
3.0
12-14 8-10 10
12.4. MOTOR-DRIVEN PUMP ID CODE
Motor output in kW
5=50Hz / 6=60 Hz
N = Oval anges, Round anges
Number of impellers (from 2 to 26)
Flow rate m
3
/h at max. ef ciency
(3, 5, 10, 18, 32, 45, 64)
Type of pump
EVM = standard version AISI304
EVML = AISI316 version,
EVMG = cast iron version,
EVMW = WRAS version
EVM 10 2 N 5 1,5w
GB
libretto_EBARA_313_nuovo.indd 12libretto_EBARA_313_nuovo.indd 12 6-02-2009 9:30:386-02-2009 9:30:38

Содержание

Скачать