4
CPN: 85616902 --- DS15
--
H---DS100
--
H
English
4
b) Stop the dryer 2 minutes after shutting down the air compressor or interrupting
the air flow to the dryer.
Avoid allowing compressed air to enter the dryer when the dryer is
switched off or when it is in an alarm situation which stops the refrigeration
compressor.
3.4 Operation
S
The dryer operates automatically. It is factory set for a dew point of 50
˚
F (10
˚
C)
and therefore requires no further calibration.
S
Do not exceed the machine’s design limits, by---pass excess air flow and check the
unit model and/or installation.
S
For maximum performance from your dryer, follow the maintenance schedule de-
scribed in Chapter 4.
S
The sound pressure level recorded for these dryers 40 inch (at 1 metre) from the
machine in free field conditions is less then 50 dB(A) (
models DS15
--
H
), 55 dB(A)
(
models DS25
--
H---DS100
--
H
)
Fig. 6 shows the Dryer’s refrigeration and air circuits.
N.B.:
In the event of aftercooler fan malfunction leading to an increase in the tem-
perature within the filter, to above 149
˚
F (65
˚
C), check the integrity of the filter’s
element and drain and substitute these components if necessary.
4 Maintenance
Before accessing live electrical parts
, disconnect the power supply to the
dryer using disconnect switch QS or disconnect the cable connections.
SAFETY DEVICES
SK
overload protector
HP
high pressure switch
(installed on models DS50
--
H---DS100
--
H)
COMPRESSOR TYPE
HERMETIC, PISTON
(single phase)
N.B.:
Always use original spares supplied by the manufacturer.
Failure to do so renders the manufacturer not liable for incorrect unit operation.
4.1 Preventive maintenance
For optimum performance from your dryer follow the periodic maintenance sched-
ule described below.
WEEKLY
CONDENATE DRAIN
WEEKLY
CONDENATE DRAIN
Verify that the condensate drain is draining correctly.
MONTHLY
COMPRESSOR
Make sure the compressor head temperature is below 200
˚
F (93
˚
C)
MONTHLY
Make sure the compressor head temperature is below 200 F (93 C)
when running. If this is not the case consult Chapter 7.
EVERY 4 MONTHS
REFRIGERANT CONDENSER AND AFTERCOOLER
Remove any dust from the condenser/aftercooler fins.
COMPRESSOR
Make sure compressor power consumption complies with data plate
specifications.
EVERY 4 MONTHS
specifications.
AFTERCOOLER FAN MOTOR
S
Check that the fan rotates freely without any abnormal noise.
S
Make sure fan power consumption complies with the specifica-
tions on the fan’s data plate.
YEARLY
AFTERCOOLER
If necessary (coil blocked) remove the fan and clean the coil in the
opposite direction to the air flow using a high pressure water jet (this
operation must be performed by a technician to avoid damage).
FILTER ELEMENT
Replace the filter element (see para. 4.2)
CONDENSATE DRAIN
Completely disassemble the drain and clean all its components (see
Fig. 9 or separate manual, according to installed drain type).
4.2 Substituting an exhausted element
(Fig. 9)
N.B.:
Don’t touch the element sock with your bare hands; use gloves.
a) Shut off or by---pass air supply to dryer.
b) Depressurise filter using manual or automatic drain valve (18). Leave valve open.
c) Unscrew (anticlockwise) filter body from head.
d) Unscrew and remove element (17).
e) Clean inside of filter if necessary.
