salmson ALTI-VS Manuel D'installation Et Mise En Service page 16

ENGLISH
6.6 Starting up
The maximum service pressure in the installation is equal to the zero-
flow pressure of the pumps plus any town water pressure at the boos-
ter inlet.
On the box, set the general disconnecting switch to "I" and the selec-
tor switches of the pumps to "Auto".
Automatic operation of the booster is then under the control of the
pressure switches and the timers.
Do not let the pump run with the discharge valve closed for
more than a few minutes.
8. OPERATING TROUBLE
ATTENTION !
Before any action, POWER DOWN the module.
TROUBLE
8.1 One or two pumps
a) Air leak at suction.
fail to prime.
b) Foot valve-strainer (Version "B") not tight or
obstructed.
c) Large losses of head at suction.
d) Town water pressure too low or zero.
e) Suction height too large (version "B").
f) Suction piping obstructed or valve on suc-
tion pipe closed.
g) The pumps turn backwards.
8.2 One pump fails to
a) Thermal relay tripped.
run.
b) Fuses defective or blown.
c) Pump shaft stalled.
d) Winding fault.
e) Coil of control relay burned out.
8.3 No discharge
a) Flow requested greater than capabilities of
pressure.
the module.
b) One or two pumps have lost water.
c) Town water pressure less than anticipated
minimum pressure.
d) The pumps turn backwards.
e) A pump is obstructed by foreign bodies.
f) The motors are supplied at too low a volta-
ge.
8.4 Frequent hunting
a) Pump control pressure switch out of adjust-
of control relays, fre-
ment.
quent starting of the
b) Capacity of installation too small.
pumps. c) No air in bladder tank.
8.5 Frequent tripping a) Dry-running pressure switch set too high.
of the dry-running b) Drop of town water pressure when pumps
safety. start.
8.6 Defective auto-
a) Fuses blown.
mation of operation.
b) Wires disconnected.
c) Pressure switches defective.
8.7 Discharge check
a) Diaphragm of check valve destroyed.
valve not tight.
CAUSE
a) Check the tightness of all suction piping connections.
Check if the suction strainer (Version "B") is correctly covered with water.
b) Check the tightness of the check valve; replace it if necessary.
c) Calculate the losses of head and make sure that they are compatible with the
NPSH of the pumps.
d) If the phenomenon recurs, it is important to go through a buffer tank.
e) Make sure that the minimum buffer tank level is compatible with the NPSH of the
pumps.
f) Check the opening of the valve and clean the piping if necessary.
g) Interchange two power supply wires on the motor terminal blocks.
a) The pump "fault" indicator on the box must be lighted. Check the adjustment of the
thermal relay and reset it by pressing in the blue button on it.
b) Replace them (check their ratings). If tripping out persists, check the current
consumption of the motor concerned. If this current is much greater than indicated
on the motor data plate, the motor is defective and must be replaced.
c) Cut off power to the box, then check that the shaft turns freely; if it is stalled, dis-
mantle the pump.
d) Disconnect the terminal block of the motor concerned and check the mains
power on the terminals and the stator insulation; replace the motor if necessary.
e) Replace it.
a) Consider replacing the module by a more suitable one (get in touch with us in all
cases).
b) Check that the suction strainer (Version "B") does not let in air and that the tank
filling point is not too close to the strainer.
c) Get in touch with the Water Board or replace the module. Get in touch with us.
d) Interchange two power supply wires on the terminal blocks of the motors.
e) Have the pump dismantled and cleaned.
f) Check the voltage on the terminals of the motors.
a) Check the adjustment: the difference between the high and low pressures must
be greater than 0.1 bar.
b) Install an additional bladder tank.
c) Pressurize the tank or replace the bladder.
a) Adjust the pressure switch correctly.
b) Set the dry-running pressure switch to its minimum. If the phenomenon persists, the
town water network is inadequate; check the pressure on the pressure gauge when
the pumps start, or get in touch with the Water Board.
a) Replace it.
b) Check all connections to the terminal block of the box.
c) Check the contacts; replace the pressure switch concerned if necessary.
a) Replace the check valves.
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7. MAINTENANCE
- The booster needs no particular maintenance in the course of
operation.
- In frosty weather and for prolonged stoppages of the pump, it must
be drained by unscrewing the bottom plug.
Fill the pump before using again.
REMEDIAL ACTION