salmson ALTI-V ELINOX-V 36 Manuel D'installation Et Mise En Service page 16

ENGLISH
6.5 Adjustments
Adjustment of automatic control pressure switch
6.5.1 Automat and electronic control of 3 pumps
(see Fig. 3)
Principle:
The adjustment is made by turning the thumbwheel (item 1) to set the
high point (stopping of pump) and the thumbwheel (item 4) to adjust
the low point or differential (stopping of pump).
Before adjusting the pressure switch, choose the starting and stop-
ping pressures with the help of the table below.
example: Starting: 4 bars
Stopping: 4.5 bars
Type
Range of adjustment
Difference
Mechanical dif.
After choosing the starting and stopping pressures, proceed as fol-
lows:
Remove the front cover.
Note (nomograph 3) the value of the differential and set it
on the thumbwheel (item 4) next to the mark.
Set the slide of the scale (item 2) to the low position by turning the
thumbwheel (item 1) anticlockwise.
Close the discharge valve.
Set the switch(es) of one (or more) pump(s) to "MAN" and hold to
increase the pressure in the installation.
At the desired pump stopping pressure, release the switch.
Turn the thumbwheel (item 1) clockwise until the contact changes
over (audible click).
Set the switches of the pumps to "AUTO" and open the discharge
valve to check your adjustments.
Adjustments OK.
Set the switch back to "O".
Put the cover back on.
PRES D02-06 PRES D4-17
0.2 6 bars 4 17 bars
0.25 0.7 bars 0.35 1.4 bar
0.25 bar 0.35 bar
Adjustments imprecise.
See "principle" paragraph and
refine your adjustments.
6.5.2 Electronic control
2 pumps (see Fig. 4)
Principle:
The adjustment is made by turning the nut (item 1) to set the high
point (stopping of pump) and the nut (item 2) to adjust the low
point (starting of pump).
• Turning the nut (item 1) clockwise increases the value of the high
point.
• Turning the nut (item 2) clockwise decreases the value of the low
point (the difference increases).
Before adjusting pressure switches PR1 and PR2, choose the starting
and stopping pressures (if necessary, use the nomographs).
Proceed as follows:
Remove the cover of contactor PR1.
Turn the nuts (items 1 and 2) fully clockwise
without tightening them.
Set the switch of one pump to "MAN" and hold to increase
the pressure in the installation.
Release the switch at the desired pump stopping pressure
(read on pressure gauge).
Turn the nut (item 1) anticlockwise until there
Open the discharge valve to lower the pressure to the desired
(read on pressure gauge).
Turn the nut (item 2) anticlockwise.
If there is a click.
Set the switch of one pump to
"AUTO" and hold to check your
adjustments.
Adjustments OK Adjustments
imprecise
Put the cover
back on See § "prin-
ciple" and
refine the
Remove the adjustments
cover of
contactor
PR2 Adjustments OK
Commission
NOTA: The high points (stopping pressures) of the two pumps are the
same. The low points (starting pressures) should be staggered 0.5
bar. Pf of PR2 < 0.5 Pf of PR1.
16
is an audible click.
pump starting level
If no click.
Check your operating points
and the tank
pre-pressurization pressure
(it must be 0.3 bar less than
the pump starting
pressure).
If necessary, choose 2 new
points and adjust the pre-
pressurization pressure.