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Setting the air flow sensor
The FS differential pressure switch intervenes if the fan (or
one of the fans) stops working.
The factory set point of the FS differential pressure switch is
at 0.8 mbar (= 80 Pa).
As the difference in pressure between the suction and
discharge of the fans depends on the air flow, it may be
necessary to set the instruments after installation, checking
that the contact closes when the fans are in operation.
To set the FS pressure switch, carry out the following
procedure:
•
simulate a fan fault by stopping a fan; check that the
pressure switch intervenes;
•
if the pressure switch does not intervene, gradually
increase the setting until the pressure switch switches
off:
- using an adjustment screw, set the differential pressure
switch on a scale from 0.8 to 4.0 mbar (from 80 to
400 Pa).
Setting the dirty filter sensors
The PFS differential pressure switch is set according to the
loss of load dependent on the dirt inside the filters and the
air flow.
The PFS differential pressure switch must be set at 3 mbar
(=300 Pa).
To set the PFS pressure switch, carry out the following
procedure:
•
gradually cover the surface of the air filter and check that
the pressure switch intervenes when the filter is about
50-60 % covered;
•
if the pressure switch does not intervene, gradually lower
the setting, if it cuts in too soon, increase the setting:
- using a star screw driver, turn the regulation screws of
the pressure switch to the desired value.
PKG-SVX19B-E4
MAINTENANCE
Check every three months:
Carry out the following checks every three months:
•
check the power supply;
•
check the alarm status;
•
check the working temperatures;
•
check the correct operation of the local/remote
controls;
•
check the air filters, cleaning and replacing them if
necessary;
•
check the efficiency of the condensing drain;
•
check the steam cylinder is clean, replacing it if
necessary (see pag.78).
Check every six months:
Carry out the following checks every six months:
•
repeat these checks every three months;
•
check and clean if necessary the cooling coil;
•
check the operation of the humidifier (if present: see
pag.78).
Annual checks
Carry out the following checks annually:
•
repeat these checks every six months
•
check the varnish and the nuts and bolts
•
check the hinges, rabbets and gaskets
•
check the cables and wiring
•
tighten the terminal blocks
•
check and reset if necessary the safety device settings
(pressure switches, thermostats, protection devices);
•
check the operation of the post heating electrical
heaters;
•
check the fittings, operation and absorption of the fan/s
motor;
•
check and if necessary reset the regulation devices
setting;
•
check and if necessary replace the seal of the hydraulic
circuits/s and tighten the unit couplings;
•
check and reset if necessary the water regulation valve/
valves setting.
57
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Table of Contents
Troubleshooting
