Sullair SRV-250 User manual

EN
F
272713
DATE: 30.09.2004 ISSUE: 4 CODE: 02250144-- 517VALID FROM SERIAL NUMBER: 2644900001
User manual Page 1
Manuale d’uso Pagina 17
SRV-- 250 --- SRV-- 2400
refrigeration dryer (60Hz)

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English
Index
1Introduction page2
1.1 Foreword page 2
1.2 Packaging page 2
1.3 Transport page 2
1.4 Storage page 2
1.5 Inspection page 2
2 Installation page 3
2.1 Electrical connection page 4
2.2 Condensate drian connection page 4
3 Start---up and operation page 5
3.1 Preliminary checks page 5
3.2 Starting the dryer page 5
3.3 Stopping the dryer page 5
3.4 Remote on---off page 5
3.5 Operation page 5
4 The control panel page 6
4.1 Front panel layout page 6
4.2 Operating Display page 6
5 Parameters page 7
5.1 Accessing type “A” paramenters page 7
5.2 Accessing password protected parameters page 8
5.3 Parameters list page 9
6Alarms page9
6.1 Resetting Alarms/Warnings page 9
6.2 Alarms/Warnings page 10
6.3 User alarms page 10
6.4 Status report page 11
7 Maintenance page 12
7.1 Preventive maintenance page 12
7.2 Disassembling the unit page 13
7.3 Refrigerant leaks in the refrigeration circuit page 13
7.4 Refrigerant charging page 13
8Calibration page13
9 Spare parts list page 13
10 Troubleshooting page 14
Safety warnings
Important:
SKeep this manual with the machine throughout its entire service life.
SCarefully read this manual before carrying out any operation on the machine.
SThis machine is designed for PROFESSIONAL USE only. Only use the
machine for the purpose for which it is intended. Improper use of the
machine absolves the manufacturer from all liability.
This manual has been compiled to help the final user perform just those oper-
ations which do not require removal of the panels.
All other operations which involve the removal of covers from instruments or
electrical circuit--- breakers using special tools must only be carried out by
trained personnel due to the danger of rotating parts or live components.
Operations on the Microprocessor which are not password protected may be car-
ried out by the final user.
Operations on the Microprocessor which are password protected should be car-
ried out by a qualified technician using the passwords given on the last page of this
manual. This page may be detached and retained by those persons authorised to
service the machine.
Each machine is equipped with an electric disconnect device (main switch) which
allowstheoperatortoworkonthemachineinabsolutesafety.This device must
always be used to disconnect the mains supply to avoid any risk of danger during
maintenance work (electric shocks, scalding, automaticstart---up, moving parts
and remote control).
Before servicing the dryer always make sure the compressed air circuit is
depressurised.
When requesting technical assistance or ordering spare parts, always quote the
model and serial number on the identification plate mounted externally on the
unit. In particular to identify the model and serial number of the control , see the
nameplate on the rear of the Microprocessor Control. To identify the software
version, refer to the Maintenance Menu.
IMPORTANT: This manual is subject to modification. For the most comprehen-
s i v e a n d u p --- t o --- d a t e i n f o r m a t i o n , t h e u ser is therefore required to consult the
manual supplied with the machine.

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2
All figures to which the “see Fig. ” references in this text refer can be found at the
end of this manual. The language translations for these figures can be found in the
Legend (A3--- sized page) inserted after all the figures.
1Introduction
1.1 Foreword
SRV dryershavebeen designedto guarantee high---quality compressed air with mini-
mum maintenance, even with various loads. This is thanks to an inverter that adjusts
the rotation speed of the fridge compressor according to the load modulating the
power frequency from 40Hz to 70Hz(models powered at 460/3/60Hz) and from40Hz
to 60Hz (for models powered at 230/3/60Hz) . For low loads, the dryer can work as
a cycling dryer.
SRV dryers give better energy saving than a cycling dryer when the load varies from
0 to 100% and also guarantee less variability of the dew point.
Please carefully read this manual to obtain maximum performance from your dryer
and ensure its correct installation and start---up in compliance with manufacturer in-
structions.
1.2 Packaging
The dryer is packaged with a strong cardboard box strapped to a wooden pallet.
Instruction symbols (UNI ISO 780) for the movement, transport and stocking of the
product are printed on two sides of the packing.
FRAGILE: HANDLE
WITH CARE
THIS WAY UP
KEEP DRY DO NOT ROLL STACKING
LIMITATION
USE NO HOOKS
Kg max
1.3 Transport
SKeeptheunitinanuprightposition and do not leave it outdoors.
SOnly move this machine using a forklift truck with a fork which is able to handle
theweighttobelifted.
SCare should be taken to avoid damaging internal components through poor han-
dling during movement, installation or use.
SUnpack the machine as close as possible to the installation site.
SEnsure the ambient temperature never exceeds 122˚F(50˚C).
SThe manufacturer assumes no liability for damages which may be caused by
decayed or modified packaging.
1.4 Storage
If stored the packaged units must be kept inside, protected from humidity, direct
sunlight and rain, and at a temperature within the limits 32---122˚F ( 0 --- 5 0 ˚C).
Moreover, although stacking is permitted the maximum weight must not be more
than the value shown on the packaging.
1.5 Inspection
On receipt of the machine, make sure it has incurred no damage during transit.
If any damage is detected promptly contact the haulage company.

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2 Installation (see Fig. 4 / Fig. 5)
a) Dryer should be installed indoors; where this is not possible it must however be
installed in a clean dry area, with a temperature within the limits 41---122˚F
( 5 --- 5 0 ˚C), and sheltered from the effects of direct weather (including direct sun-
light).
b) The compressed air inlet temperature must never exceed 140˚F(60˚C). For dif-
ferent temperatures to those indicated above, consult the manufacturer.
The working pressure on the air side must not exceed 174 psig (12 barg).
The dryer must not be subjected to fatigue stress caused by repeated fluctuations
in the incoming air temperature.
c) Allow for a 60 inch (1,5 meters) gap around the unit to facilitate maintenanceand
ensure unimpeded air discharge from the condenser.
Air--cooled versions: leaveaspaceofatleast80inch(2meters)abovetheDryer.
The volume of the room in which the unit is installed must be more than 1800
foot
3(
50 m
3
).
d) For most compressed air applications we recommend following the installation
plan (see Fig. 1). This layout ensures optimum compressor, filter and dryer per-
formance and also guarantees excellent air quality whilst minimising operating
costs.
e) Donotobstructthedryerairgrilles.
f) Avoid recirculation of hot condenser air back into the condenser air inlet.
g) If the system is prone to instantaneous pressure surges which exceed the dryer’s
rated capacity, mount a suitably sized receiver near the overpressure source. For
more precise information, contact the manufacturer or distributor.
h) It is necessary to install a pre--- filter (max. 3 micron) on the dryer intake to pre-
vent rust, scale or other pollutants from entering the system and clogging the
condensate drain and heat exchangers, thereby causing severe pressure drops.
This filter must be close to the dryer inlet.
i) For water cooled versions it is recommended to install a filter on the condenser
water inlet to prevent the ingress of debris that will gradually choke the passages,
with negative effects on dryer performance.
j) Water--cooled versions
RECOMMENDATIONS FOR THE WATER AND ITS QUALITY
The water quality should satisfy the following conditions:
Parameter Concentration Parameter Concentration
Minimum inlet
1
0
˚
C
Oxygen <0.1 ppm
M
i
n
i
m
u
m
i
n
l
e
t
temperature
1
0
˚
C
Iron (Fe) <0,2 ppm
Langelier Index 0 --- 1 Nitrate (NO
3
)<2 ppm
pH 7 . 5 --- 9 Alkalinity (HCO
3---
)70---300 ppm
Sulfate (SO
42 ---
)<50 ppm Hydrogen Sulfide (H
2
S) <0.05 ppm
Electrical conductivity 10---500µS/cm Free CO
2
<5 ppm
Ammonia (NH
3
)<1 ppm Aluminium (Al) <0.2 ppm
Chloride (Cl
---
)<50 ppm Condenser cooling 43.5---145 psig
To t a l H a r d n es s 70---150 ppm CaCO
3
C
o
n
d
e
n
s
e
r
c
o
o
l
i
n
g
water pressure
4
3
.
5
1
4
5
p
s
i
g
(3---10 barg)
k) Always install a bypass line with shut---off valves (supplied as option for
SRV-- 250 --- SRV-- 500) to permit maintenance or calibration without interrupting
the compressed air flow to the user.
The dryer pneumatic circuit must be protected by one or more safety valves to
prevent the design pressure 174 psig (12 barg) from being exceeded at all times.
These valves must be fitted in such a way that there is no risk of any expelled fluid
coming into contact with operators.
l) Correctly connect the dryer to the air inlet and outlet connections. If the com-
pressed air circuits are subject to vibration, usehoses to connect the dryer tocom-
pensate for this. If the circuits are subject to pulsations, eliminate them by con-
necting the dryer to an air chamber to equalise the pressure.
m) Do not connect condensate drains common to other pressurised drain lines in a
closed circuit. Make sure the outflow from the condensate drains is unimpeded.
Connect the condensate piping in such a way to ensure that sound levels are kept
to a minimum during drainage.
Ensure that all condensate is disposed of in a responsible manner, in accordance
with local norms concerning environmental protection.

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4
n) The ambient air around the dryer and compressor must not contain solid or gas-
eous contaminants. All compressed and condensed gases can generate acids or
chemical products which may damage the compressor or components inside the
dryer.
Take particular care with sulphur, ammonia, chlorine and installations in marine
environments. For further advice or assistance consult the manufacturer.
o) If the dryer is installed in a seismic zone, suitable protectionagainst seismicstress
should be fitted.
p) In settings where there is an average or high risk of fire, provide an adequate
fire---fighting system or fit a safety valve on the dryer refrigeration circuit posi-
tioned directly (without any shut---off valve) on the low pressure side, set to a
pressure of 276 psig (19 barg), with a discharge capacity of at least 0.2 kg/sec (of
R407C). This operation must be carried out by a trained, certified technician.
The valve must be positionedin such away thatit does not dischargein the opera-
tors’ direction.
2.1 Electrical connection (see Fig. 5 / Fig. 10)
Use a cable that complies with regulations inforce inthe countryof installation(con-
n e ct e d t o t e r m i n a ls “ L 1 --- L 2 --- L 3 o f m a i n s w i t ch a n d G N D ”), with minimum
wire sizes: (see machine electrical schematic in Fig. 10).
Install an overcurrent and earth leakage circuit breaker upstream from the
plant (IDn = 0.3A) with a 0.12 inch (3 mm) gap between contacts when open (refer
also to local laws).
2.2 Condensate drain connection
a) The drainer is already installed and cabled.
b) Connect the condensate drain outlet to the drainage system.
c) Any maintenance operation must be done by an expert technician.
N.B.: The dryer is supplied either with a timed drain or an electronic level sensing
drain. Refer to the separate manual supplied with the dryer for specific details con-
cerning the condensate drain.
2.2.1 --- Timed drain
The drain control parameters are A03 (time on) and A04 (time off); see para. 5.3).
It is possible to manually activate the drain, pressing the button ”drain test”, and to
force the drain valve always open, changing to “YES” the parameter A05.
2.2.2 --- Electronic drain
The electronic drain operates without any need for programming (and as such the
on and off time parameters are ignored). It is possible to connect the alarm relay of
the electronic drain to the ”drain alarm” input on the Dryer’s terminal board (ter-
minals 51 and 65, see wiring diagram).
3 Start---up and operation
N.B.: For instructions on operation of control panel, refer to Chapter 4.
3.1 Preliminary checks
Beforestartingupthedryer,makesurethat:
a) the air inlet valves are closed and there is no air flow through the dryer.
b) The mains power supply is commensurate with the dryer voltage.
c) The dryer is installed in compliance with the installation instructions given in
Chapter 2.

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3.2 Starting the dryer
a) The dryer is started using the main switch.
b) Always start up the dryer before activating the air compressor.
c) First of all, close any switches upstream from the dryer. Only after this start the
dryer turning their yellow---red handle ”main switch” to I.
To turn the dryer off completely, turn the main isolator switch ”main switch” to
0, then open any switches upstream from the dryer.
d) If the Dryer is under power (white LED near the button ”standby” lit up) the
Dryer can be started using ”on” button. When operating the green LED near
”on” button is lit up.
e) Wait about 5 minutes until the dryer is running at the correct operating tempera-
tures and pressures.
f) Slowly open the air inlet valve to pressurise the dryer.
g) Slowly open the air outlet valve. The dryer is now operating (drying).
h) Always leave the dryer running while the air compressor is operating.
Air--cooled versions: it is very important to check the rotational direction of the
fans. If supplied with the wrong phase frequency, they will turn in the opposite direc-
tion. In this case they risk being damaged. SWAP OVER THE PHASES IMMEDI-
ATELY. Check that the air flow is outgoing from the grille of the fan.
Water--cooled versions: it is recommended to open the cooling water circuit just
a few minutes before starting the dryer; it is moreover recommended to close the
water circuit when the dryer is stopped.
3.3 Stopping the dryer
a) To stop the Dryer, press the “standby” (see Safety Warnings).
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
offorwhenitisinanalarmsituationwhichstopstherefrigerationcompressor.
3.4 Remote on---off
Remote on---off is enabled or disabled by the parameter B06, and can be performed
either using a remote on---off switch (connected to terminals 51 --- 63 of Dryer’s ter-
minals board) or a supervisor system.
There are 3 settings for parameter B06:
SNo: The remote on---off contact is ignored and the Dryer must be started/
stopped on the front panel.
SYes: The Dryer can be started/stopped both remotely and using the front panel.
When stopped remotely “r.OFF” is shown on the display.
SLOC: (i.e. “Lock”): the Dryer can only be started/stopped remotely; the front
panel’s on/off function is ignored.
NB1: This must be programmed when the Dryer is not in stand---by, other-
wise the system blocks.
NB2: This setting must be accompanied, for safety reasons, by an emergency
stop on the Dryer.
3.5 Operation
SOnce started, the Dryer has been pre---programmed to operate autonomously,
without the need for any further programming.
SDo not exceed the machine’s design limits, bypass excess air flow and check the
unit model and/or installation.
SFor maximumperformance fromyour dryer, follow the maintenance schedule de-
scribed in Chapter 7.
SThe sound pressure level recorded for these dryers at 40 inch (1 meter) from the
machine in free field conditions) is less then 70 dB (A).
SFig. 6 shows the Dryer’s refrigeration and air circuits.
SThe Dyers adjusts the speed of the variable speed compressor measuring the
refrigerant suction pressure and the evaporation temperature; In conditions of
very low (or null) load, compressor can be stopped, and the Dryer enters in cycling
operation. In this way the Dryer obtains an accurate Dew Point control together
with maximum energy savings.

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4 The control panel
The Microprocessor’s interface board (see Fig. 11) is positioned within the Dryer’s
electrical panel.
The Dryer’s electrical drawing gives full details concerning the interface’s layout.
The Microprocessor Control arrives already installed in its housing and pro-
grammed with the Factory Settings listed in CHAP. 5.
4.1 Front panel layout
All operations are controlled from and displayed on the front panel, (as shown
below).
4.2 Operating Display
During normal operation, the display shows the Dew Point temperature, preceded
by the wording “t0”. When the arrow keys are pressed, temperatures t3 (ambient
temperature) and t4 (temperature of air entering the dryer) are shown in turns. If
the keys are not pressed for 5 minutes, the Dew Point temperature is automatically
displayed.
Front panel
DISPLAY
Swhen in normal operation the dew point temperature
is shown;
Swhen in programming mode the parameter type,
number and value are displayed;
Swhen the unit is in stand---by, the sign ”OFF” appears.
Metric/Imperial data display
when a temperature or a pressure is shown on
the display, it indicates the unitsof thereading.
Main switch
Disconnect the dryer
from the mains.
Smoves back to the previous parameter type when selecting the type of
parameter to modify;
Smoves back to the previous parameter number when selecting the
parameter to modify;
Sincreases the parameter value when modifying parameters.
Smoves to the successive parameter type when selecting the type of
parameter to modify;
Smoves to the successive parameter number when selecting the para-
meter to modify;
Sdecreases the parameter value when modifying parameters.
turns the dryer on; the green led lights when dryer is operating.
switches the dryer off; the whiteLED lights up whenthe unit is connected
to mains (main switch is ON);
Saccess to parameters programming / visualisation;
Sconfirms the type of selected parameter;
Sconfirms the number of selected parameter.
Sconfirms the value assigned to the selected parameter.
Saccess to the alarms history;
Sexits from the parameter programming;
checks the condensate drain valve; the green
LED lights when drain valve is ON.
Sturns off the alarm buzzer;
S·showsthealarmcode;
Sresets the alarms.

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5 Parameters
Dryer operation depends on a number of parameters; the user can access some of
these directly, others are password protected.
The parameters are divided into 7 types, identified by a letter.
Type ”A” parameters: are not password protected;
Type ”b” parameters: can be accessed by entering the maintenance password, quo-
ted on the last page of the manual.
Type ”C”, ”d”, ”E”, ”F”, ”H” parameters: are reserved parameters and can only be
modified by the manufacturer.
5.1 Accessing type “A” parameters
To read or modify type “A” parameters, press the “prog” key once. On the left, the
display will show only the letter “A” , which indicates the type of parameter currently
being modified.
When the “prog” key is pressed again, the word on the left becomes “A01”,which
indicates that the type A parameter, number 01, is currently selected.
Using the arrow keys, select the parameter number to be edited, remembering that
the down arrow selects the next parameter (and thus increases the parameter num-
ber), while the up arrow selects the previous parameter.
After selecting the desired parameter, press the “prog” key again; the display will
now show the current parameter value.
If the parameter being edited can be modified (hour meter parameters, for instance,
cannot be modified), the parameter value can be increased or diminished using the
arrow keys.
When the “prog” key is pressed, the new value set is recorded in the parameter and
the display goes back to showing the type and number of parameter being edited.
If “status report” is pressed after modifying the displayed value, the display goes
back to showing the type and number of parameter without recording its new value.
When “status report” is pressed once, the display goes back to showing the selection
ofthetypeofparameter.If“status report” is pressed again, parameter editingis exi-
ted and the display goes back to showing the Dew Point temperature (or the word
“OFF” if the control is in stand---by). The procedure for modifyingtype “A” parame-
ters is schematized in the figure below.
Changing a type “A” Parameter
Modify the parameter using and .
press prog
press
press and
press
press and
You can modify a parameter either
with dryer working or in stand by.
Type “A” parameters are selected.
Parameter A01 is selected.
Select the parameter to be modified.
Now parameter A04 is selected.
The value of parameter is shown.
press
press
press
Parameter A04 has been changed to 10 seconds.
Selected parameter is shown.
Selected type of parameter is shown.
Dryer status is shown again.
prog
prog
press prog
To exit editing
without
modifying the
parameter.
To memorise the new value.

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5.2 Accessing password protected parameters
To display/modify parameters other than type “A” ,pressthe“prog” key once: the let-
ter “A” will be displayed.
Select the type of parameter to be edited using the arrow keys, then press “prog”
again. The wording “P-- -- -- -- 0” will appear on the display.
This indicates the request to enter the password. The password is entered one figure
at a time, starting from the last one (furthest to the right).
The value of the last figure is altered using the arrow keys until it coincides with the
last figure of the password.
When “prog” is pressed again, the wording on the display becomes“P-- -- -- 0-- ”;setthe
fourth figure usingthe arrowkeys, press“prog” and continue enteringthe otherfigu-
res. Once the first figure is set (furthest to the left), press “prog” again; if the
sequence of figures entered corresponds to the required password, access is gained
to the parameters and the display willshow thetype of parameters selectedfollowed
by the figures “01”.
Now proceed as described above to choose and modify a parameter. If the sequence
of figures is not correct, the display goes back to showing “P-- -- -- -- 0”; start entering
the password again or press “status report” to give up modifying the protected para-
meters.
Every time the “status report” keyisusedtomakethedisplaygobacktoshowing
just the type of parameter, the password needs to be entered once more to access the
parameters.
The procedure for modifyingtype “b” parameters is schematized in the figure below.
Changing a type “b” Parameter
press
press and
press
press
press and
press
press and
Select the parameter type.
Last digit of Password is requested.
Fourth digit of Password is requested.
Parameter b01 is selected.
Change the parameter value as
explained for type “A”parameters.
Insert the last digit of Password.
First digit of Password has been entered.
If the Password is correct, you have access to
type “b” parameter.
Selected the parameter to be modified.
Insert all digits of Password.
prog
prog
prog
prog

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5.3 Parameters list
Ty p e No. Description Range Units Default
A 1 Dryer working hours 0---999999 hours 0
A 2 Compressor working hours 0---999999 hours 0
A 3 ON time of drain valve (0=disabled) 0 --- 1 0 0 secs 4
A 4 OFF time of drain valve 1 --- 9 9 9 secs 170
A 5 Manually force ON drain valve no, YES --- --- --- no
A 6 Metric/Imperial data reading ˚C --- b A r ˚F --- P S I --- --- --- ˚F --- P S I
b 1 Maintenance due warning interval 0---999999 hours 20000
b 2 Dryer working time reset no, YES --- --- --- no
b 3 Compressor working time reset no, YES --- --- --- no
b 4 Automatic restart after power interrupt no, YES --- --- --- YES
b 5 Automatic restart delay 0 --- 3 0 0 secs 0
b 6 Remote OFF (by contact or supervisor)
enable no,YES,LOC --- --- --- no
b 7 Net identification number of dryer 1 --- 2 0 0 --- --- --- 1
b 8 Communication speed with supervisor 1200---19200 bits/sec 1200
b 9 Communication protocol ModbuS, CUStOM --- --- --- ModbuS
b10 Air inlet temperature sensor installed no, YES --- --- --- YES
b11 Ambient temperature sensor installed no, YES --- --- --- YES
b12 Effect of user alarm intervention run, StOP --- --- --- run
b13 Signalling delay of user alarm 0 --- 6 0 0 secs 0
b14 User alarm reset mode MANUAL, Auto --- --- --- Auto
b15 High dew point warning temperature 0.0---30.0---32.0---86.0 ˚C
˚F
10.0
50.0
b16 High dew point warning delay 1 --- 6 0 mins 15
b17 High air inlet temperature warning 10---99
50---210
˚C
˚F65.0 149.0
b18 High ambient temperature warning 0 --- 7 0
32---158
˚C
˚F55 131
b19 Low ambient temperature warning -- 30---30
-- 22---86
˚C
˚F2 35.6
b20 Alarm sound activation time
(0=continuously) 0 --- 9 0 0 secs 0
b21 Version and revision number of software --- --- --- --- --- --- --- --- ---
b22 Emission date of software --- --- --- --- --- --- --- --- ---
b23 New password for ”b” type parameters 1---32000 --- --- --- 0
6Alarms
The Dryer features numerous Alarms and Warnings to ensure correct operation.
Warnings do not effect Dryer operation, whilst Alarms partially or totally block
Dryer operation.
NB: A voltage free General Alarm contact is provided, to allowremote Alarmsignal-
ing (refer to Dryer’s electrical diagram).
6.1 Resetting Alarms/Warnings
The following scheme outlines the procedure to be applied to reset an Alarm or
Warni ng.
press alarm
ALARM/WARNING
intervention
Salarm siren sounds
Salarm LED turns on
Sunit reacts as in Tab. 1
S“OFF” is displayed if the dryer stops.
reset
press alarm
reset
press alarm
reset
alarm siren is muted
Alarm/Warning type is
displayed
Salarm LED switches off
Sdisplay returns to normal
Sunit returns to normal operation
fault(s)
rectified
fault(s) not rectified

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6.2 Alarms/Warnings
Tab. 1 list all Alarms and Warnings, as well as explaining their effect on Dryer oper-
ation.
Whenever an alarm occurs, the current readings of temperatures and pressure are
registered in the status report (see para. 6.4).
Tab. 1 --- Alarms/Warnings
Alarm
code
Alarm/Warning
description Action Intervention delay
HP High discharge pressure alarm Dryer off Immediate
Ld Low Dew Point alarm Dryer off Immediate
IE Inverter error Dryer off Immediate
EP Permanent memory error Dryer off Immediate
FP Fan thermal protection alarm Dryer off Immediate
LP Low suction pressure alarm Dryer off Immediate
Hd High Dew Point warning Signal only Programmable
1÷60 min
AS1 Dew Point sensor fault Dryer off Immediate
AS2 Evaporation temperature sensor fault Dryer off Immediate
AS3 Suction temperature sensor fault Signal only Immediate
AS4 Ambient temperature sensor fault Signal only Immediate
AS5 Air inlet temperature sensor fault Signal only Immediate
AS6 Suction sensor pressure fault Dryer off Immediate
HI High air inlet temperature warning Signal only Immediate
HA High ambient temperature warning Signal only Immediate
LA Low ambient temperature warning Signal only Immediate
UA User alarm See par. 6.3 Programmable
0÷600 sec
dA Condensate drain alarm Signal only Immediate
PS Programmed maintenance due --- Warning Signal only Immediate
6.3 User alarms
The Dryer is equipped with a user alarm input (terminals 51 and 66 of Dryer’s ter-
minal board), useful to detect and signal a specific alarm condition, depending on
the user’s needs. The user alarm is completely programmable in effect on Dryer’s
operation, intervention delay, and reset mode.
SParameter B12 selects the effect of user alarm intervention on Dryer’s operation;
if its value is “run”, the Dryer continues to work, and the alarm condition is only
signalled activating the alarm relay; if its value is “StoP”,theDryerstops.
SParameter B13 allows a delay for the alarminterventionto be programmed (inthe
r a n g e 0 --- 6 0 0 s e c s . ) .
SParameter B14 selects the reset mode of user alarm, and has meaning only if the
effect is “StoP”;ifitsvalueis“A u t o ” , the Dryer automatically restarts when the
alarm cause has been resolved; if its value is “MANUAL”, the alarm must be man-
ually reset (either through the button “alarm reset” or the input “remote reset”,
terminals 51 and 64) for the Dryer to restart.

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6.4 Status Report
Status Report lists the 8 most recent alarms, and memorizes all sensors readings at
thetimewhenofeachoftheseintervenes.
Status Report can be accessed at any time, and operates as described in figure
besides.
To exit Status Report (and return to operating display) simply press again “status
report”.
Status Report
press
press
press for 3 seconds
press
press press
press
press
press
press
press
press
press
The status report is accessible
either with dryer in standby or
working.
The unit working
hours counter at the
intervention of alarm
No. 1 is shown.
Dew point temperature
is shown.
The display showns the
evaporation temperature.
The evaporation pressure
is shown.
The suction temperature
is shown.
The alarm No. 1 code is shown.
The alarm No. 2
code is shown.
Up to 8 alarms are
stored in memory.
The ambient temperature
is shown.
The air inlet ambient
temperature is shown.
To exit from status report,
repeatedly press .
N.B. 1: Alarm No. 1 refers to the most
recent Alarm to have intervened, No. 2
the penultimate, and so on.
N.B. 2: When viewing the alarm
number/code, pressing moves back
to the previous (more recent) alarm.
prog
prog
prog
prog
prog
prog
prog
prog

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English
12
7 Maintenance
The user is responsible for recording all maintenance in a machine log, which is to
be accessible to maintenance personnel.
This log is to contain at least the following information:
Sdetails of all repairs and maintenance;
Sthe quantity and type of refrigerant loaded or discharged on each occasion;
Sthe results of any analysis of recycled refrigerant;
Sthe origin of any recycled refrigerant;
Soperations carried out on machine components;
Sthe results of routine inspections;
Ssignificant periods during which the machine was not used;
Before accessing live electrical parts , disconnect the power supply to the
dryer using disconnect switch QS or disconnect the cable connections.
SAFETY DEVICES
HP high pressure switch
COMPRESSOR TYPE
PISTON
N.B.: Always use original spares supplied by the manufacturer.
Failure to do so renders the manufacturer not liable for incorrect unit operation.
7.1 Preventive maintenance
For optimum performance from your dryer follow the periodic maintenance sched-
ule described below.
W
E
E
K
L
Y
CONDENATE DRAIN
W
E
E
K
L
Y
C
O
N
D
E
N
A
T
E
D
R
A
I
N
See condensate drain manual supplied separately.
M
O
N
T
H
L
Y
COMPRESSOR
M
a
k
e
s
u
r
e
t
h
e
c
o
m
p
r
e
s
s
o
r
h
e
a
d
t
e
m
p
e
r
a
t
u
r
e
i
s
b
e
t
w
e
e
n
5
9
˚
F
(
1
5
˚
C
)
a
n
d
M
O
N
T
H
L
Y
M
a
k
esure
t
h
e compressor
h
ea
d
t
empera
t
ure
i
s
b
e
t
ween
5
9
F
(
1
5
C
)
an
d
203˚F(95˚C) when running. If this is not the case consult Chap.10.
EVERY
CONDENSER
Remove any dust from the condenser fins.
C
O
M
P
R
E
S
S
O
R
E
V
E
R
Y
4MONTHS COMPRESSOR
Make sure compressor power consumption complies with data plate specifica-
tions.
CONDENSATE DRAIN
C
o
m
p
l
e
t
e
l
y
d
i
s
a
s
s
e
m
b
l
e
t
h
e
d
r
a
i
n
a
n
d
c
l
e
a
n
a
l
l
i
t
s
c
o
m
p
o
n
e
n
t
s
C
omp
l
e
t
e
l
y
d
i
sassem
b
l
e
t
h
e
d
ra
i
nan
d
c
l
ean a
l
l
i
t
scomponen
t
s.
Refer also to condensate drain manual supplied separately.
Y
E
A
R
L
Y
W A T E R --- C O O L E D M O D E L S
In applications with a very high fouling tendency (eg. when using extremely hard
water) clean the exchanger by circulating a cleaning liquid. Use a tank with a
weak acid, 5% phosphoric acid, or if the exchanger is frequently cleaned 5%
oxalic acid. Pump the cleaning liquid through the exchanger. For optimum
cleaning the cleaning solution flow rate should be a minimum of 1.5 times the
normal flow rate, preferably in a backflush mode. Afterwards rinse with large
amounts of fresh water, in order to get rid of all the acid, before starting up the
system again. Clean at regular intervals.
Y
E
A
R
L
Y
Heat exchanger
Weak acid
water
in
water
out
The control panel is equipped with terminals for the connection of a remote alarm.
Do not use solvents to clean the control panel on the front of the unit.

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Code: 02250144-- 517 SRV-- 250 --- SRV-- 2400
English
7.2 Disassembling the unit
The machine has beendesigned and constructedtoguarantee continuousoperation.
The long service life of some components such as the fan and compressor depends
on good maintenance.
Theunitmustonlybedisassembledbyarefrigerantspecialist.
Refrigerant liquid and lubricating oil inside the refrigeration circuit must be recov-
ered in compliance with current norms in the country where the machine is installed.
RECYCLING
DISASSEMBLY
frame and panels steel/epoxy resin polyester
heat exchanger (cooler) aluminium
pipes copper/aluminium
drainage system brass/PC
heat exchanger insulation EPS (polystyrene sintered)
pipe insulation gum synthetic
compressor steel/copper/aluminium/oil
condensator steel/copper/aluminium
refrigerant R407C (H, F, C)
valve brass
electrical cable copper/PVC
7.3 Refrigerant leaks in the refrigeration circuit
FOREWORD
The unit is delivered in perfect working order, already charged as specified in Fig. 5.
IF A LEAK IS DETECTED IN THE REFRIGERANT CIRCUIT SEEK TECHNI-
CAL ASSISTANCE.
7.4 Refrigerant charging (see Fig. 5)
THIS OPERATION MUST ONLY BE PERFORMED BY A REFRIGERANT
SPECIALIST.
WHEN REPAIRING THE REFRIGERANT CIRCUIT, COLLECT ALL THE RE-
FRIGERANT IN A CONTAINER AND DISPOSE OF IT IN THE APPROPRIATE
MANNER.
Characteristics of refrigerant R407
In normal temperature and pressure conditions the above refrigerant is a colourless,
class A1/A1 gas with TVL value of 1000 ppm (ASHRAE classification).
If a refrigerant leak occurs thoroughly air the room before commencing work.
8Calibration
The dryer is supplied factory set with the values shown in Fig. 9 and therefore re-
quires no further calibration.
9 Spare parts list (see. Fig. 7)
This list contains the principal spare parts. When ordering spare parts always quote
the quantity, part code and machine serial number.

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English
14
10 Trouble shooting
The following diagram lists the various problems which may occurduring the dryer’s
service life. Inthe case of serious difficulties however, contact a refrigerant specialist.
For alarms and warnings refer also para. 6.2.
NOTE:Alwaysbypassthedryerwhenitisoutofservice.
Fault Cause Remedy Can be simulated in test rooms
Overload (high compressed air flow and/or high inlet temperature
and/or low pressure and/or high ambient temperature). Reduce load. Yes, in particular for high com- pressed air flow.
Faulty Compressor (noisy, piston valves broken, etc.). Replace compressor. NO
Solenoid by pass valve always open because of:
1. Wrong settings.
2. Microprocessor NO4 output always ON.
3. Dirty valve.
1. Correct settings.
2. Change microprocessor.
3. Change valve.
Yes, always ON.
Condensing pressure too high because of:
1. PV settings too high.
2. Dirty condenser surface.
3. Fan (on multi fan units) doesn’t work.
1. Change PV.
2. Clean condenser.
3. Change fan.
NO
High dew point (Hd) Wrong Thermostatic valve setting (excessively closed or excessively
open). Adjust setting. Yes
Thermostatic valve broken. Substitute valve. NO
Wrong microprocessor settings. Change settings. NO
Incorrect calibration of T1, T0 and or P1. Adjust calibrations. YES, in particular T1 and P1.
Incorrect positioning of T0 probe. Place in correct position. YES
Incorrect refrigerant charge:
1. Too low (low evaporation Pressure, high superheat).
2. Too high (low discharge temperature, compressor vibration at
starts).
Re charge according to name plate
data. YES, in particular if too low.
Thermostatic solenoid valve doesn’t work (broken or no
electrical supply). Change valve or check and adjust wirings. YES

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Code: 02250144-- 517 SRV-- 250 --- SRV-- 2400
English
Fault Cause Remedy Can be simulated in test rooms
W
a
t
e
r
d
o
w
n
s
t
r
e
a
m
Condensate drain doesn’t work (dirt in strainer, solenoid blocked). Replace or clean. NO
W
a
t
er
d
owns
t
ream
of the dryer Condensate drain’s timer settings are wrong. Increase ON period and/or decrease
OFF period. NO
Incorrect refrigerant charge: too low (low evaporation pressure, high
superheat). Re charge according to name plate data. YES
Low pressure
alarm (LP)
Refrigerant leakages (pipes, connections, evaporator,
condenser, fittings). Repair leakage. Yes, by simulating an incorrect refrigerant charge.
a
a
(
)
Incorrect Thermostatic valve setting (too close). Adjust setting. YES
Pressure transducer offset is incorrect. Adjust offset. YES
Excessive refrigerant charge. Re charge according to name plate
data. NO
HP switch broken. Substitute HP switch. NO
Leakage in evaporator (compressed air in refrigerant circuit). Substitute evaporator. NO
High Pressure
alarm (HP)
Condensing pressure too high because of:
1. PV settings too high.
2. Dirty condenser surface.
3. Fan broken.
1. Substitute PV.
2. Clean condenser.
3. Substitute fan.
NO
Excessive ambient temperature. Decrease ambient temperaure.
Excessive load. Decrease load.
I
t
1. Inverter broken.
2. Compressor broken.
3. Compressor bypass valve broken.
4. Incorrect electrical supply voltage.
5
H
i
g
h
i
n
v
e
r
t
e
r
t
e
m
p
e
r
a
t
u
r
e
1.
2.
3.
4.
5
Substitute inverter.
Substitute compressor.
Substitute bypass valve.
Stabilize voltage.
1
C
h
e
c
k
v
e
n
t
o
p
e
n
i
n
g
s
c
l
o
s
e
t
o
Yes, in particular point 3.
In
v
erter
alarm (IE)
5
.
H
i
g
h
i
nver
t
er
t
empera
t
ure.
5
.
1
.
C
h
ec
k
ven
t
open
i
ngs c
l
ose
t
o
inverter, and clean them.
2. Check inverter fan.
3. Decrease ambient tempera-
ture if too high.
6. Automatic switch OFF. 6. Switch on the automatic switch.

16
Code: 02250144-- 517 SRV-- 250 --- SRV-- 2400
English
16

17
Code: 02250144-- 517 SRV-- 250 --- SRV-- 2400
Français
Sommaire
1Introduction page16
1.1 Avant---propos page 16
1.2 Emballage page 16
1.3 Transport page 16
1.4 Stockage page 16
1.5 Inspection page 16
2 Installation page 17
2.1 Raccordement électrique page 18
2.2 Raccordement purge condensats page 18
3 Mise en marche et fonctionnement page 19
3.1 Contrôles préliminaires page 19
3.2 Miseenmarchedel’installation page 19
3.3 Arrêt de l’installation page 19
3.4 Marche et Arrêt page 19
3.4 Fonctionnement page 19
4 Le panneau de commande page 20
4.1 Disposition du panneau avant page 20
4.2 Affichage du fonctionnement page 20
5 Paramètres page 21
5.1 Accès aux paramètres de type “A” page 21
5.2 Accès aux paramètres protégés par un moto de passe page 22
5.3 Liste des paramètres page 23
6Alarmes page23
6.1 Réinitialisation des alarmes et avertissements page 23
6.2 Alarmes et avertissements page 24
6.3 Alarmes utilisateur page 24
6.4 Rapport d’état page 25
7Entretien page45
7.1 Entretien préventif page 45
7.2 Démantèlement de l’unité page 46
7.3 Perte de réfrigérant du circuit frigorifique page 46
7.4 Charge de réfrigérant page 46
8Réglages page46
9 Liste des pièces détachées page 46
10 Détection des pannes page 47
Consignes de sécurité
Il est recommandé:
Sde conserver le manuel pendant toute la période de vie de la machine;
Sde lire attentivement le manuel avant d’effectuer toute opération sur la ma-
chine;
Sde n’utiliser la machine que pour un USAGE PROFESSIONNEL et pour les
opérations pour lesquelles elle a été conçue; une utilisation impropre de l’u-
nité dégage le constructeur de toute responsabilité.
Le présent manuel s’adresse à l’utilisateur final, uniquement pour les
opérations pouvant être réalisées lorsque les panneaux sont fermés.
Les opérations pour lesquelles il est nécessaire d’ouvrir les couvercles
d’instruments ou d’interrupteurs électriques à l’aide d’outils ne doivent être
effectuées que par un personnel expert car certaines parties tournantes de la
machine sont en mouvement et d’autres composants sont sont tension.
Lesopérationssurlemicroprocesseurqui ne font pas l’objet d’un mot de passe
peuvent être effectuées par l’utilisateur final.
Les opérations sur le microprocesseur qui font l’objet d’un mot de passe doivent
être effectuées par un technicien qualifié qui utilisera les mots de passe fournis à
la dernière page de ce manuel. Il est possiblededétachercettepageafinqu’elle
soit en possession des personnes autorisées à entretenir la machine.
Chaque machine est équipée d’un dispositif de déconnexion électrique (commu-
tateur principal) qui permet à l’opérateur d’intervenir sur la machine en toute
sécurité. Ce dispositif doit toujours être utilisé afin d’éliminer tout danger
pendant les opérations d’entretien (secousses électriques,brûlures, remises en
marche automatiques, parties en mouvement et contrôle à distance).
Avant de procéder à des opérations d’entretien, s’assurer que le circuit pneumati-
que du sécheur n’est plus sous pression.
Pour identifier la machine (modèle et numéro de série), en cas de demande d’as-
sistance ou de pièces détachées, lire la plaquette d’identification qui se trouvesur
l’extérieur de l’unité. En particulier, voir la plaquette d’identification située à l’ar-
rière du microprocesseur pour identifier le modèle et le numéro de série du
contrôleur. Se référer au menu entretien pour identifier la version du logiciel.
ATTENTION : ce manuel est susceptible de subir des modifications; par conséquent, afin
d’assurer une information complète et actualisée, l’utilisateur devra toujours consulter le
manuel à bord de la machine.

18
Code: 02250144-- 517 SRV-- 250 --- SRV-- 2400
Français
Toutes les figures auxquelles renvoient les mentions “voir Fig.”de ce texte appa-
raissent à la fin de ce manuel. La traduction des légendes s’y rapportant se trouve
(surpagesA3)aprèslesfigures.
1Introduction
1.1 Avant---propos
Les sécheurs SRV ont été conçus pour garantir l’air comprimé haute qualité avec le
moindre entretien même avec des charges variables. Cela grâce à un convertisseur
qui contrôle la vitesse de rotation du compresseur frigorifique en modulant la fré-
quence d’alimentation selon la charge de 40Hz à 70Hz (modèles alimentés à
460/3/60Hz) de 40Hz à 60Hz (pour des modèles alimentés à 230/3/60Hz). En cas de
faibles charges, le sécheur peut travailler comme un sécheur à succession de cycle.
Les SRV permettentunemeilleureéconomieénergétiqueaufuretàmesurequela
charge varie de 0 à 100% par rapport à un sécheur à succession de cycles et garantis-
sent une variabilité du point de rosée plus limité.
Il est conseillé de lire attentivement le présent manuel afin d’obtenir les meilleures
performances du sécheur et de s’assurer que l’unité est installée et mise en service
conformément aux instructions fournies par le Constructeur.
1.2 Emballage
Lesécheurestcontenudansuneboîteencartonfixéeèl’aidedefeuillardsàunepa-
lette en bois. Sur les côtés de chaque emballage sont estampillés les symboles (UNI
ISO 780) pour le transport, la manutention et le stockage.
FRAGILE: HANDLE
WITH CARE
THIS WAY UP
KEEP DRY DO NOT ROLL STACKING
LIMITATION
USE NO HOOKS
Kg max
1.3 Transport
SVeiller à ce que l’unité soit toujours en position verticale et ne pas la laisser
séjourner à l’extérieur.
SDéplacer la machine à l’aide d’un chariot élévateur à fourche de la capacité
appropriée pour le poids à soulever.
SFaire attention de ne pas endommager des parties intérieures par une mauvaise
manutention pendant le déplacement, l’installation ou l’emploi.
SDétailler l’unité aussi près que possible du lieu d’installation.
SVeiller à ce que la température ambiante ne dépasse jamais 122˚F(50˚C).
SLa responsabilité du constructeur ne sera pas engagée en cas de dommages
éventuels dus à des altérations et/ou à des modifications de l’emballage.
1.4 Stockage
Encas de stockage, conserver les unités emballées à l’intérieur, à l’abri de l’humidité,
du soleil et de la pluie, avec une plage de température de 32 à 122˚F(0à50˚C).
Par ailleurs, bien qu’un empilage soit possible, le poids maximal ne doit pas excéder
la valeur indiquée sur l’emballage.
1.5 Inspection
Dès la réception de la machine, contrôler son état; contester immédiatement tout
dommage éventuel à la société de transport.

19
Code: 02250144-- 517 SRV-- 250 --- SRV-- 2400
Français
2 Installation (voir Fig. 4 / Fig. 5)
a) Le déshydrateur devra être installé à l’intérieur ; lorsque cela n’est pas possible,
il devra cependant être installé dans une zone sèche et propre, avec une plage de
températurede41---122˚F(5à50˚C). Il devra également être protégé contre
tout effet de conditions climatiques directes (y compris la lumière du soleil
directe).
b) Latempératuredelaprised’aircompriménedoitpasdépasser140˚F(60˚C).
Pour des valeurs de température différentes de celles indiquées ci---dessus,
consulter le fabricant. La pression de fonctionnement côté air ne doit pas
dépasser 174 psig (12 barg).
Ne pas soumettre le sécheur à des contraintes de fatigue dues à des fluctuations
répétéesdelatempératured’entréedel’air.
c) Laisser autour de l’unité un espace de 60 inch (1,5 mètres) pour l’entretien et
pour assurer l’évacuation de l’air du condenseur.
Pour les modèles à refroidissement par air: laissez un espace d’au moins 80 inch (2
m è t r e s) a u --- d e s s us d u s è ch e --- l i n ge .
Le volume de la pièce destinée à l’installation doit être supérieur à 1800 foot
3
(50
m
3
).
d) Il est conseillé, pour la majeure partie des applications à aircomprimé, de réaliser
l’installation de la façon indiquée (voir Fig. 1). Cette disposition peut aider à as-
surer une excellente performance du compresseur, des filtres et du sécheur, et
assurera en outre une excellente qualité de l’air et des coûts de fonctionnement
minimaux.
e) Veiller à ce que les grilles de ventilation du sécheur restent dégagées.
f) Eviterlarecirculationdel’airchaudducondenseurdanslaprised’airducondenseur.
g) Si l’installation est destinée à être sujette à d’importants débits instantanés supé-
rieurs à la capacité “dimensionnée” des sécheurs, un récepteur ayant des dimen-
sions appropriées devra être monté à proximité de la source dela surcharge. Pour
plus d’informations contacter le producteur ou votre distributeur.
h) Il est nécessaire d’installer un préfiltre (max. 3 microns) sur l’entrée du sécheur
afin d’empêcher que la rouille, le tartre et autres produits polluants bloquent le
système de purge des condensats et les échangeurs de chaleur et causent ainsi
de fortes pertes de charge d’air.
Le filtre doit être près de l’arrivée du sécheur.
i) Il est recommandé, pour les modèles à refroidissement liquide, d’installer un fil-
tre sur l’entrée du retour d’eau du condenseur afin d’empêcher le dépôt de débris
qui provoquerait une obstruction progressive des canalisations, avec les
conséquences négatives que cela peut engendrer sur lesprestations de l’appareil.
j) Pour les modèles à refroidissement liquide
RECOMMANDATIONS SUR L’EAU ET SA QUALITÉ
La qualité de l’eau doit satisfaire aux conditions suivantes:
Paramètre Concentration Paramètre Concentration
Température minimale
1
0
˚
C
Oxygène <0.1 ppm
T
e
m
p
é
r
a
t
u
r
e
m
i
n
i
m
a
l
e
en entrée
1
0
˚
C
Fer (Fe) <0,2 ppm
IndicedeLangelier 0 --- 1 Nitrate (NO
3
)<2 ppm
pH 7 . 5 --- 9 Alcalinité (HCO
3---
)70---300 ppm
Sulfate (SO
42 ---
)<50 ppm Sulfure d’hydrogène (H
2
S) <0.05 ppm
Conductivité électrique 10---500µS/cm CO
2
libre <5 ppm
Ammoniac (NH
3
)<1 ppm Aluminium (Al) <0.2 ppm
Chlorure (Cl
---
)<50 ppm Pression d’eau refroidisse- 43.5---145 psig
Dureté totale 70---150 ppm CaCO
3
P
r
e
s
s
i
o
n
d
e
a
u
r
e
f
r
o
i
d
i
s
s
e
ment condenseur
4
3
.
5
1
4
5
p
s
i
g
(3---10 barg)
k) Toujours installer une ligne de by---pass et des vannes d’interception (fournies en
option SRV-- 250 --- SRV-- 500) afin que les opérations d’entretien ou de réglage
puissent être effectuées sans qu’il soit nécessaire de couper le débit d’air compri-
mé à l’utilisateur.
Le circuit pneumatique du sécheur doit être protégé par une ou plusieurs sou-
papes de sûreté afin d’éviter une pression de service supérieure à la limite accep-
tée par la machine 174 psig (12 barg). Ces vannes doivent être montées de façon
à ce que l’éventuelle éjection de fluide ne frappe pas les opérateurs.
l) Relier correctement le sécheur aux raccords d’entrée et de sortie de l’air. Rac-
corder le sécheur à l’aide de tuyaux flexibles si le réseau d’air comprimé est sujet
aux vibrations, de façon à les éliminer. Si le réseau est sujet à des pulsations, les
éliminer en effectuant un raccordement avec des amortisseurs de pulsations.
m) Ne pas relier en circuit fermé des évacuations de condensats en commun avec
d’autres lignes de purge pressurisées.
Visualiser l’évacuation des condensats pour vérifier leur écoulement correct.
Raccorderletuyaudeconduitedelacondensationdefaçonàcequeleniveau
sonore soit le plus faible possible durant le drainage.
Veiller à ce que toute la condensation soit éliminée soigneusement, dans le re-
spect des normes locales en matière de protection de l’environnement.