Main Switch - AERMEC NSB Serie Manual Tecnico

15.8

MAIN SWITCH

1251 1401
IG 250 A 315 A
2502 2652
IG 630 A 630 A
5203 5403
IG 1000 A 1250 A
15.9 PRESSURE SWITCH AND TRASDUCER
1251 1401
AP (bar) 18/19 18/19
TAP (bar) 17.7 17.7
TBP (bar) 0,6 0,6
2502 2652
AP (bar) 18/19 18/19
TAP (bar) 17.7 17.7
TBP (bar) 0,6 0,6
5203 5403
AP (bar) 18/19 18/19
TAP (bar) 17.7 17.7
TBP (bar) 0,6 0,6
All units are thoroughly tested in the
factory before shipping. Nonetheless,
it is always good practice to check all
control and safety systems after a
reasonable period of operation.
All the control operations must be
carried out by qualified personnel; the
wrong settings on the above devices
can cause serious damage to the unit.
15.9. 1 High pressure switch
The high pressure switch stops the
compressor (generating the relative
alarm) when the delivery pressure
exceeds the set value.
The control of its correct working can
be made by closing the air suction
on the exchanger (in cold mode) and,
keeping the high pressure gauge under
control, checking it intervenes upon
reaching the calibrated value.
WARNING
If the switch does not trip at the
1601 1801 2101
315 A 400 A 630 A
2802 3002 3202
630 A 630 A 630 A
5703 6003 6303
1250 A 1250 A 1600 A
1601 1801 2101
18/19 18/19 18/19
17.7 17.7 17.7
0,6 0,6 0,6
2802 3002 3202
18/19 18/19 18/19
17.7 17.7 17.7
0,6 0,6 0,6
5703 6003 6303
18/19 18/19 18/19
17.7 17.7 17.7
0,6 0,6 0,6
calibrated value, stop the compressor
immediately and identify the cause.
Reset is manual and only enabled
once the pressure drops below the
differential value. (For the set and
differential values, see the technical
manual).
15.9.3 Low pressure switch
The low pressure switch stops the
compressor (generating the relative
alarm) when the suction pressure
drops below the set value. The control
of its correct working can be made
(after about 5 minutes of operation) by
slowly closing the tap on the liquid pipe
and, keeping the low pressure gauge
under control, checking it intervenes
upon reaching the calibrated value.
WARNING
If the switch does not trip at the
calibrated value, stop the compressor
immediately and identify the cause.
2401 1402 1602
630 A 315 A 315 A
3402 3602 3902
800 A 800 A 800 A
6603 6903 7203
1600 A 1600 A 1600 A
2401 1402 1602
18/19 18/19 18/19
17.7 17.7 17.7
0,6 0,6 0,6
3402 3602 3902
18/19 18/19 18/19
17.7 17.7 17.7
0,6 0,6 0,6
6603 6903 7203
18/19 18/19 18/19
17.7 17.7 17.7
0,6 0,6 0,6
1802 2002 2202
400 A 400 A 400 A
4202 4502 4802
800 A 1000 A 1000 A
1802 2002 2202
18/19 18/19 18/19
17.7 17.7 17.7
0,6 0,6 0,6
4202 4502 4802
18/19 18/19 18/19
17.7 17.7 17.7
0,6 0,6 0,6
LEGENDA
AP Doppio Pressotato di alta pres-
sione
TAP Trasduttore di alta pressione
TBP Trasduttore di bassa pressione
Reset is manual and only enabled
once the pressure rises above the
differential value. (For the set and
differential values, see the technical
manual).
15. 1 .3 Anti-freeze control
The anti-freeze control, managed
by electronic regulation and by the
temperature probe at the evaporator
outlet, has the job of preventing the
formation of ice when the water
flow rate is too low. The control of
its correct working can be made by
gradually increasing the anti-freeze
set until it exceeds the outlet water
temperature and, keeping the water
temperature under control with a
precise thermometer, checking that
the unit switches off, generating the
relative alarm. After this operation,
bring the anti-freeze set back to its
original value.
2352
630 A
5003
1000 A
2352
18/19
17.7
0,6
5003
18/19
17.7
0,6
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