Cag purification LTE3 HGV User manual

LTM 0003 51 Rev.00 CANADA
REFRIGERATED AIR DRYER
SÉCHEUR A CYCLE FRIGORIFIQUE
LTE 3 HGV to LTE 8 HGV
USER’S MAINTENANCE
AND SPARE PARTS MANUAL
MANUEL D’INSTRUCTIONS ENTRETIEN
PIECES DE RECHANGE
AIR - COOLED
REFROIDISSEMENT A AIR
ISSUE •
••
•EDITION
2005
F
GB
F
GB

ENGLISH

GB
Dear Customer,
thank you for choosing our product. In order to get the best performance from this product, please read this
manual carefully. To avoid incorrect operation of the equipment and possible physical risk to the operator,
please read and strictly follow the instructions contained in this manual. Note, these instructions are in
addition to the safety rules that apply in the country where the dryer is installed.
This manual refers to refrigerated air dryers model LTE3, LTE 5 and LTE8 air cooled, fitted with DMC6 Air
Dryer Controller.
Before packing for shipment each LTE series refrigerated air dryer is subjected to a rigorous test to ensure
the absence of any manufacturing faults and to demonstrate that the device can perform all the functions
for which it has been designed.
Once the dryer has been properly installed according to the instructions in this manual, it will be ready for
use without any further adjustment.
The operation is fully automatic, and the maintenance is limited to few controls and some cleaning
operations, as detailed in the following chapters.
This manual must be maintained available in any moment for future references and it has to be
intended as inherent part of the relevant dryer.
Due to the continuous technical evolution, we reserve the right to introduce any necessary change without
giving previous notice.
Should you experience any trouble, or for further information, please do not hesitate to contact us.
IDENTIFICATION PLATE
Model 
Serial No. 
Code 
Nominal Flow Rate 
Max Air Pressure 
Max Inlet Air Temp. 
Ambient temp. 
Refrigerant 
Refrig. Design Pres. HP/LP 
Electric Supply 
Electric Nominal Power 
Fuse Max. 
Manufactured 
The product identification plate,
on the back of the dryer, shows
all the primary data of the
machine.
Upon installation, fill in the table
copying the data shown on the
identification plate. This data
must always be provided to the
manufacturer or to the dealer
when information or spares are
needed, even during the
warranty period.
The removal or the alteration of
the identification plate will void
the warranty rights.
Model
Serial No.
Code
Max Air Pressure
Max Inlet Air Temp.
Ambient Temp.
Refrigerant
Refrig. Design Pres. HP/LP
Electric Supply
Electric Nominal Power
Fuse Max.
Manufactured
psig
°F
°F
type/oz
psig
V/ph/Hz
W/A
A
Nominal Flow Rate scfm
WARRANTY CONDITIONS
For 12 months from the installation date, but no longer than 14 months from the delivery date, the warranty
covers faulty parts, which will be repaired or replaced free of charge, except the travel, hotel and restaurant
expenses of our technician.
The warranty doesn’t cover any responsibility for direct or indirect damages to persons, animals or
equipment caused by improper usage or maintenance, and it’s limited to manufacturing faults only.
The right to warranty repairs is subordinated to the strict compliance with the installation, use and
maintenance instructions contained in this manual.
The warranty will be immediately voided in case of even small changes or alterations to the dryer.
To initiate repairs during the warranty period, the data reported on the identification plate must be provided.

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1. SAFETY RULES
1.1 Definition of the Signs Used in this Manual
1.2 Warnings
1.3 Proper Use of the Dryer
2. INSTALLATION
2.1 Transport
2.2 Installation site
2.3 Installation layout
2.4 Correction factors
2.5 Connection to the Compressed Air System
2.6 Connection to the Mains
2.7 Condensate Drain
3. START-UP
3.1 Preliminary Operations
3.2 First Start Up
3.3 Operation and Switching Off
4. TECHNICAL CHARACTERISTICS
4.1 Technical Features of Dryers series LTE3, LTE5 and LTE8
5. TECHNICAL DESCRIPTION
5.1 Operation
5.2 Flow Diagram
5.3 Refrigeration Compressor
5.4 Condenser
5.5 Dehydration Filter
5.6 Capillary Tube
5.7 Evaporator
5.8 Hot Gas By-pass Valve
5.9 Air-to-air Heat Exchanger
5.10 Condensate Separator
5.11 DMC6 Air Dryer Controller
6. MAINTENANCE, TROUBLESHOOTING, SPARES AND DISMANTLING
6.1 Controls and Maintenance
6.2 Suggested Spare Parts
6.3 Troubleshooting
6.4 Dismantling of the Dryer
7. LIST OF ATTACHMENTS
7.1 Dryers Dimensions
7.2 Exploded View
7.3 Electric Diagrams

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1.1 DEFINITION OF THE SIGNS USED IN THIS MANUAL
Before attempting any intervention on the dryer, read carefully the instructions reported in this use
and maintenance manual.
General warning sign. Risk of danger or possibility of damage to the machine. Read carefully the
text related to this sign.
Electrical hazard. The relevant text outlines conditions which could result fatal. The related
instructions must be strictly respected.
Danger hazard. Part or system under pressure.
Danger hazard. Component or system which during the operation can reach high temperature.
Danger hazard. It’s absolutely forbidden to breath the air treated with this apparatus.
Danger hazard: It’s absolutely forbidden to use water to extinguish fire on the dryer on in the
surrounding area.
Danger hazard. It’s absolutely forbidden to operate the machine when the panels are not in place.
Maintenance or control operation to be very carefully performed by qualified personnel 1.
ARIA
AIR
LUFT
AIR
Compressed air inlet connection point.
ARIA
AIR
LUFT
AIR
Compressed air outlet connection point.
Condensate drain connections point.
Operations which can be worked out by the operator of the machine, if qualified 1.
NOTE : Text to be taken into account, but not involving safety precautions.
In designing this unit a lot of care has been devoted to the environment protection:
•CFC free refrigerants
•Foamed insulation parts realised without CFC
•Energy saving design
•Limited acoustic emission
•Dryer and relevant packaging composed of recyclable materials
Not to spoil our commitment, the user should follow the few ecological suggestions marked with
this sign.
1Experienced and trained personnel acquainted with the relevant rules and laws, capable to perform the needed activities and to identify and
avoid possible dangerous situations while handling, installing, using and servicing the machine.

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1.2 WARNINGS
Compressed air is a highly hazardous energy source.
Never work on the dryer with parts under pressure.
Never point the compressed air or the condensate drain jet towards anybody.
The user is responsible for the installation of the dryer, which has to be executed on the basis of
the instructions given in the “Installation” chapter. Otherwise, the warranty will be voided and
dangerous situations for the personnel and/or damages to the machine could occur.
Only qualified personnel can use and service electrically powered devices. Before attempting any
maintenance action, the following conditions must be satisfied :
•Be sure that no part of the machine is under voltage and that it cannot be connected to the
mains.
•Be sure that no part of the dryer is under pressure and that it cannot be connected to the
compressed air system.
Any change to the machine or to the relevant operating parameters, if not previously verified and
authorised by the Manufacturer, in addition to create the possibility of dangerous conditions it will
void the warranty.
Don’t use water to extinguish fire on the dryer on in the surrounding area.
1.3 PROPER USE OF THE DRYER
This dryer has been designed, manufactured and tested only to be used to separate the humidity normally
contained in compressed air. Any other use has to be considered improper.
The Manufacturer will not be responsible for any problem arising from improper use; the user will be in any
case responsible for any resulting damage.
Moreover, the correct use requires the respectation of the installation conditions, in particular :
•Voltage and frequency of the mains.
•Pressure, temperature and flow-rate of the incoming air.
•Ambient temperature.
This dryer is supplied tested and fully assembled. The only operation left to the user is the connection to the
plant in compliance with the instructions given in the following chapters.
The purpose of the machine is the separation of water and eventual oil particles present in
compressed air. The dried air cannot be used for respiration purposes or for operations leading to
direct contact with foodstuff.
This dryer is nor suitable for the treatment of dirty air or of air containing solid particles.
2.1 TRANSPORT
Once verified the integrity of the packaging, place the unit near to the installation point and unpack the
contents.
•To move the packaged unit we suggest to use a suitable trolley. Transportation by
hands is discouraged.
•Keep the dryer always in vertical position. Turning it upside down some parts
could be irreparably damaged.
•Even when packaged, keep the machine protected from severity of the weather.
The packaging materials are recyclable. Each single material must be properly disposed in a
manner complying with the rules in force in the destination country.

GB
2.2 INSTALLATION SITE
Particular care is required in selecting the installation site, as an improper location could
jeopardise the proper operation of the dryer.
This unit is not suitable to be used in explosive atmosphere, where risk of fire could exist, or in
presence of gaseous or solid polluting material.
Don’t use water to extinguish fire on the dryer on in the surrounding area.
Minimal installation requirements :
•Select a clean room dry, free from dust, and protected from atmospheric disturbances.
•The supporting plate must be smooth, horizontal and able to hold the weight of the dryer.
•Minimum ambient temperature 34°F (+1°C), see the data plate for maximum temperature.
•Allow at list a clearance of 16in (400mm) on each side of the dryer for proper ventilation and to facilitate
eventual maintenance operations.
The dryer doesn't require to be fixed to the supporting surface. Eventual locks will be required for special
installations (on brackets, hanging, etc.).
2.3 INSTALLATION LAYOUT
Suggested dryer installation.
2
1
8
79 9
6
OUT
IN
9
4
9
3
5
1 Air compressor 6 Final filter
2 Aftercooler 7 Dryer
3 Condensate separator 8 By-pass group
4 Pre-Filter 9 Condensate drain
5 Compressed air receiver

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2.4 CORRECTION FACTORS
Correction factor for operating pressure changes :
Inlet air pressure psig 60 70 85 100 115 130 140 155 170 200 218
barg 4.1 4.8 5.9 6.9 7.9 9.0 9.7 10.7 11.7 13.8 15.0
Factor (F1) 0.70 0.85 0.93 1.00 1.06 1.11 1.15 1.18 1.21 1.25 1.28
Correction factor for ambient temperature changes :
Ambient temperature ºF 80 90 100 110 113
ºC 26.7 32.2 37.8 43.3 45.0
Factor (F2) 1.09 1.06 1.00 0.90 0.83
Correction factor for inlet air temperature changes:
Air temperature ºF 90 100 110 113
ºC 32.2 37.8 43.3 45.0
Factor (F3) 1.15 1.00 0.82 0.75
Correction factor for DewPoint changes:
DewPoint ºF 38 40 44 47 50
ºC 3.3 4.4 6.7 8.3 10.0
Factor (F4) 1.00 1.05 1.10 1.15 1.20
How to find the air flow capacity: How to select a suitable dryer for a given duty:
Air flow
capacity =XFactor (F1)
Factor
(F2)
XFactor
(F3)
XX
Factor
(F4)
Nominal
duty = ÷ Factor
(F1)
Factor
(F2)
÷Factor
(F3)
÷÷
Factor
(F4)
Design
air flow
Std. air
flow rate
Minimum
Example: Example:
A LTE 5 has a nominal duty of 15 scfm (26
Nm3/h). What is the maximum allowable flow
through the dryer under the following operating
conditions:
−Inlet air pressure = 85 psig (5.9 barg)
−Ambient temperature = 110 °F (43.3 °C)
−Inlet air temperature = 110 °F (43.3 °C)
−Pressure DewPoint = 38 °F (3.3 °C)
Each item of data has a corresponding numerical
factor as follows:
The procedure here is to list the operating
conditions and then to locate the corresponding
numerical factors:
−Design air flow = 9 scfm (15 Nm3/h)
−Inlet air pressure = 85 psig (5.9 barg)
−Ambient temperature = 110 °F (43.3 °C)
−Inlet air temperature = 110 °F (43.3 °C)
−Pressure DewPoint = 38 °F (3.3 °C)
In order to select the correct dryer model the
required flow rate is to be divided by the correction
factors relating to above mentioned parameters:
Air flow
capacity =X X XX
0.9315 0.90 1.000.82
=÷÷÷÷
0.939 0.90 1.000.82
Std. air
flow rate
Minimum
= 10.3 scfm (17.5 Nm3/h) →This is the
maximum flow rate that the dryer can accept
under these operating conditions.
= 13.1 scfm (22.3 Nm3/h) →Therefore the
model suitable for the conditions above is LTE 5
(15 scfm, 26 Nm3/h - nominal duty).

GB
2.5 CONNECTION TO THE COMPRESSED AIR SYSTEM
Operations to be performed by qualified personnel. Never operate with plants under pressure.
The user is responsible to ensure that the dryer will never be operated with pressure exceeding
the nominal values. Eventual over-pressure could be dangerous both for the operator and the
machine.
The temperature and the amount of air entering the dryer must comply with the limits reported on the data
plate. In case of treatment of air at particularly high temperature, the installation of an aftercooler could
result necessary. The cross section of the connecting piping, which must be free from dust, rust, chips and
other impurities, must be consistent with the flow-rate of the dryer.
DRYER
INLET
DU
COMPRESSEUR
D'UTILISATION
AU POINT
DRYER
OUTLET
ENTRÉE DE
SÉCHEUR
SÉCHEUR
SORTIE DE COMPRESSOR
OF USE
FROM
TO POINT
In order to facilitate the maintenance operations a
by-pass group can be installed, as shown in the
following illustration.
In realising the dryer, particular measures have been
taken in order to limit the vibration which could occur
during the operation. Therefore we recommend to
use connecting pipes able to insulate the dryer from
possible vibrations originating from the line (flexible
hoses, vibration damping fittings, etc.).
2.6 CONNECTION TO THE MAINS
The connection to the mains, to be carried out by qualified personnel, and the safety systems must
comply with local rules and laws.
Before connecting the unit to the electric power, verify that the voltage and the frequency available on the
mains correspond to the data reported on the data plate of the dryer. In terms of voltage, a ±5% tolerance is
allowed.
The dryer comes with a mains connecting cable already installed and ending with a North-American
standard plug 2 poles + earth.
The mains socket must be provided with a mains magneto-thermal differential breaker (I∆n=0.03A),
adjusted on the basis of the consumption of the dryer (see the nominal values on the data plate of the
dryer).
The cross section of the power supply cables must comply with the consumption of the dryer, while keeping
into account also the ambient temperature, the conditions of the mains installation, the length of the cables,
and the requirements enforced by the local Power Provider.
It’s mandatory ensure the connection to the ground terminal.
Don’t use adapters on the mains socket. If necessary, have the pug replaced by qualified
personnel.
2.7 CONDENSATE DRAIN
The condensate is discharged at the same pressure of the air entering the dryer.
Never point the condensate drain jet towards anybody.
The dryer comes already fitted with tubing in flexible plastics (0.24in. - 6mm diameter and 4.9ft - 1500mm long).
The condensate drain occurs through a solenoid valve protected with a mechanical filter. In order to avoid
clogging of the solenoid valve, the condensate coming from the condensate separator is previously filtered,
than discharged. The solenoid valve coil is operated by an adjustable electronic timer.
Connect and properly fasten the condensate drain to a collecting plant or container.
The drain cannot be connected to pressurised systems.
Don’t dispose the condensate in the environment.
The condensate collected in the dryer contains oil particles released in the air by the compressor.
Dispose the condensate in compliance with the local rules.
We suggest to install a water-oil separator where to convey all the condensate drain coming from
compressors, dryers, receivers, filters, etc.

GB
3.1 PRELIMINARY OPERATION
Verify that the operating parameters matches with the nominal values reported on the data plate of
the dryer (voltage, frequency, air pressure, air temperature, ambient temperature, etc.).
Before delivery, each dryer is submitted to accurate tests simulating real operating conditions.
Nevertheless, the unit could be damaged during transportation. We therefore suggest to check the integrity
of the dryer upon arrival and to keep it under control during the first hours of operation.
The start-up must be performed by qualified personnel.
It’s mandatory that the engineer in charge will adopt safety operational conditions complying with
the local safety and accident prevention requirements.
The same engineer will be responsible for the proper and safe operation of the dryer.
Never operate the dryer if their panels are not in place.
3.2 FIRST START-UP
At the first start-up, or for start-up after a long period of inactivity, or after maintenance operations,
follow the instructions given below.
The start-up must be performed by qualified personnel.
Sequence of operations :
•Ensure that all the steps of the “Installation” chapter have been observed.
•Ensure that the connection to the compressed air system is correct and that the piping is suitably fixed
and supported.
•Ensure that the condensate drain pipes are properly fastened and connected to a collection system or
container.
•Ensure that the by-pass system (if installed) is open and the dryer is isolated.
•Ensure that the condensate drain valve/strainer is open.
•Remove any packaging and other material which could obstruct the area around the dryer.
•Activate the mains switch.
•Switch ON the dryer by means of the lighted main switch.
•Check that the green lighted main switch is ON.
•Wait a few minutes and check that the condensate drain is regularly cycling and the hot-gas solenoid
valve was activated at least once.
•Ensure the consumption matches with the values of the data plate.
•Close the by-pass system.
•Check the piping for air leakage.
3.3 OPERATION AND SWITCHING OFF
Operation :
•Check the condenser for cleanliness.
•Verify that the system is powered.
•Activate the lighted main switch on the dryer .
•Wait few minutes then switch ON the air compressor.
Switching OFF :
•Switch OFF the air compressor.
•After few minutes, switch OFF the dryer.
During the operation, the refrigeration compressor and the condenser unit fan will run continuously.
The dryer must remain ON whenever compressed air is being used, even if the air compressor only loads
intermittently.

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4.1 TECHNICAL FEATURES OF DRYERS SERIES LTE3, LTE 5 and LTE8
DRYER MODEL LTE3 LTE5 LTE8
Air flow rate at nominal condition 1 [scfm]
[Nl/min]
[Nm3/h]
10
285
17
15
425
26
25
708
42
Pressure DewPoint at nominal condition 1 [°F - °C] 38 – 3.3
Nominal ambient temperature [°F - °C] 100 - 37.8
Max. ambient temperature [°F - °C] 115 – 45
Min. ambient temperature [°F - °C] 34 – 1
Nominal inlet air temperature [°F - °C] 100 - 37.8
Max. inlet air temperature [°F - °C] 115 – 45
Nominal inlet air pressure [psig - barg] 100 - 6.9
Max. inlet air pressure [psig - barg] 232 – 16
Max. outlet air pressure drop - ∆p [psi - bar] 4.4 - 0.3
Inlet-outlet air connection Copper pipe OD 3/8 in. (9.52 mm) 1/2” NPT-F
Refrigerant type R134.a (HFC) - CH2F-CF3
Refrigerant charging [oz - g] 4.1/2 - 130 7 - 200 7 - 200
Cooling air capacity [scfm - Nm3/h] 120 - 200 200 - 340 200 - 340
Power supply [Phase/V/Hz] 1/115/60
Nominal electric consumption [W - A] 190 - 2.2 240 - 2.9 310 - 3.9
Max. electric consumption [A] 210 - 2.5 270 - 3.2 350 - 4.4
Compressor power [HP] 1/8 1/6 1/5
Weight [lbs - kg] 62 - 28 68 - 31 75 - 34
Max. noise level at 40in (1m) < 70 dbA
1The nominal condition refers to an ambient temperature of 100°F with inlet air at 100 psig and 100°F.
5.1 OPERATION
The dryer described in this manual basically consists of two separated circuits: a compressed air circuit,
divided into two heat exchangers, and a refrigeration circuit.
The warm and humid entering air goes through an air-to-air exchanger before entering the evaporator (air-
to-refrigerant heat exchanger) where, due to the contact with the refrigeration circuit, it cools down to allow
the condensation of the humidity it contains. The condensed humidity is than separated and expelled into
the condensate separator.
The cooled air goes through the air-to-air heat exchanger, where it partially warms up in cooling down the
entering warm air (pre-refrigeration).
The refrigeration circuit needed for these operations is basically composed of a refrigeration compressor, a
condenser and an evaporator, also called air-to-refrigerant heat exchanger.

GB
5.2 FLOW DIAGRAM
43
9
10
7
85
M
1
ELE
12
2
12
14
ELE
6
13
11
1 Refrigeration compressor 8 Condensate separator
2 Condenser unit 9 Condensate drain valve/strainer
3 Solid filter dryer 10 Condensate drain solenoid valve
4 Capillary tube 11 Condenser unit fan
5 Evaporator - Air-to-refrigerant heat exchanger 12 Electronic controller – DMC6
6 Hot gas by-pass solenoid valve 13 Condensing temperature probe
7 Air-to-air heat exchanger 14 By-pass system
Compressed air flow direction Refrigerant flow direction
5.3 REFRIGERATION COMPRESSOR
The compressor is the pump of the system where the refrigerant coming from the evaporator (low pressure
side) is compressed up to the condensation pressure (high pressure side).
All the compressor used are manufactured by primary companies and are designed for applications where
high compression ratios and wide temperature changes are present.
The fully sealed construction is perfectly gas tight, so ensuring high energy efficiency and long useful life.
The pumping unit is supported by dumping springs, in order to consistently reduce the acoustic emission
and the vibration diffusion.
The electric motor is cooled down by the aspirated refrigerant gas, which goes through the coils before reaching
the compression cylinders. The internal type thermal protection protects the compressor from overloads. The
protection is automatically restored as soon as the nominal temperature conditions are reached.

GB
5.4 CONDENSER
The condenser is the element in which the refrigerant gas coming from the compressor is cooled and
condensed into a liquid. Mechanically, the condenser is a copper tube coil with aluminium fins to improve
heat transfer. Cooling air flow is provided by high efficiency multi blade axial fan.
The coil and fan assembly are contained in a robust, pressed steel enclosure.
For correct operation of the condenser the temperature of the ambient air should not exceed the nominal
values. It is important TO KEEP THE UNIT FREE FORM DUST AND OTHER IMPURITIES.
5.5 DEHYDRATION FILTER
The function of the dehydration filter, located before the capillary tubing, is to remove impurities and
moisture from the refrigerant stream, so avoiding their circulation within the system.
5.6 CAPILLARY TUBE
It consists of a piece of reduced cross section copper tubing located between the dehydration filter and the
evaporator to form a throttling against the flow of the refrigerating fluid. This throttling creates a pressure
drop, which is a function of the temperature to be reached within the evaporator : less is the capillary tube
outlet pressure, less is the evaporation temperature.
The length and the diameter of the capillary tube are accurately sized with the performance to be reached
by the dryer; no maintenance/adjustment operations are necessary.
5.7 EVAPORATOR
Also called an air-freon exchanger. The liquid formed in the condenser is evaporated in this part of the
circuit. In the evaporation phase the refrigerator tends to absorb the heat from the compressed air present
in the other side of the exchanger. The evaporator is insulated with non-CFC expanded insulating foam.
The part is entirely constructed in copper and the cooler goes in the opposite direction to the air, thus
contributing to limit pressure loss and to provide efficient thermal exchange.
5.8 HOT GAS BY-PASS VALVE
This valve injects part of the hot gas (taken from the discharge side of the compressor) in the pipe between
the evaporator and the suction side of the compressor, keeping the evaporation temperature/pressure
constant at approx. +2 °C. This injection prevents the formation of ice inside the dryer evaporator at every
load condition.
ADJUSTMENT
The hot gas by-pass valve is adjusted during the manufacturing testing
phase. As a rule no adjustment is required; anyway if it is necessary
the operation must be carried out by an experienced refrigeration
engineer.
WARNING : the use of ¼” Schrader service valves must be
justified by a real malfunction of the refrigeration system. Each
time a pressure gauge is connected, a part of refrigerant is
exhausted.
Without compressed air flow through the dryer, rotate the adjusting
screw (position A on the drawing) until the following value is reached:
Hot gas setting (R134.a) : temperature 2.5°C, 36.5°F (+0.5 / -0 °K)
pressure 2.2 barg , 32 psig (+0.1 / -0 bar)
A
4 mm
5/32 in.
+
-
5.9 AIR-TO-AIR HEAT EXCHANGER
All the dryers of this range are provided with a copper air-to-air heat exchanger. The purpose of this exchanger
is the transmission of the heat of the incoming air to the exiting cold air. The benefits of this solution are
basically two : the incoming air is partially cooled down, therefore the chilling system can be sized for a lower
thermal drop, thus allowing a 40÷50% energy saving; moreover, as cool air will never reach the compressed
air circuit, no condensate will form on the external surface of the piping.
5.10 CONDENSATE SEPARATOR
The cold air exiting the evaporator goes through the condensate separator featuring a stainless steel net.
As the condensate transported by the air gets in contact with the metallic net it is separated and expelled by
means of the draining device. The resulting cold and dry air is then conveyed into the air-to-air heat
exchanger. This condensate separator offers the benefit to be highly efficient even with variable flow rates
and to not require special maintenance.

GB
5.11 DMC6 AIR DRYER CONTROLLER
45 23 16
ON
°C
- +
COM B DNL
Probe-Sonde ABCDEF
DIPS
Trimmer
Régulateur
The DMC6 Air Dryer Controller controls condensing temperature and
drain valve. The activation of the condenser fan is driven by means of
a probe located at the end of the condenser, while a cyclic electronic
timer drives the condensate drain solenoid valve at regular intervals.
The DMC6 Air Dryer Controller is adjusted during the final test of the
dryer. In case of particular requirements concerning the operation
management, the user can change the setting of the programmed
parameters.
The parameters which can be set up are the following :
SET-POINT SET-UP
Set-Point is the activation temperature of the condenser fan.
Set-Point is factory standard setted at 84.2 to 86 °F (29 to 30 °C), with a fix hysteresis - ∆t - equal to 3.6 °F
(2 ºK). In this way, the fan is activated when the temperature rises over 84.2 to 86 °F (29 to 30 °C) and
deactivated when the temperature falls below 80.6 to 82.4 °F (27 to 28 °C).
To adjust the Set-Point follow next steps:
•Put your thermometer probe in contact with the condenser outlet pipe close to the DMC6 probe.
•Switch ON the dryer and wait few minutes.
•Using a small screw driver rotate the set-point adjusting trimmer so the fan starts at a temperature
between 84.2 and 86 °F (from 29 to 30 °C). By rotating the trimmer clockwise, the set-point will increase
up to a top value of approx. 95°F (35°C); by rotating the trimmer counter clockwise, the set-point will
decrease down to a minimum value of approx 77°F (25°C).
NOTE : Any non authorised intervention will void the warranty.
DRAINING TIME SET-UP
It is possible to adjust two times:
•T
ON - activation time of the condensate drain solenoid valve.
•T
OFF - pause time between two consecutive activation of the condensate drain solenoid valve.
To modify these two times, simply move the 6 micro-switches (DIPS) following the schedule below:
TOFF - pause time TON - activation time
DIPS D+E+F D+E D+F E+F F E D C B A
Time [sec] 210 180 150 90 30 60 120 1 2 4
DIPS A, B & C adjust activation time (TON).
DIPS D, E & F adjust pause time (TOFF); pause time can be cumulated (i.e. DIPS E+F, D+F, D+E and D+E+F).
Standard setting : DIP B and E set to ON equal to TON = 2 sec and TOFF = 60 sec. Drain solenoid valve will
be activated 2 seconds every 60 seconds.

GB
6.1 CONTROLS AND MAINTENANCE
The maintenance and the service operations for all dryers must be performed by qualified personnel
only.
Before performing any service or maintenance on the equipment the technician must insure
the following :
•must take every precaution to insure that no part of the machine being serviced or
maintained has live power to it. The main disconnect on the unit and from the main power
supply must be switched off before performing service. In order to insure safety it is also
recommended that the main power wiring leading to the equipment be disconnected.
•must depressurize the equipment in order to insure a safe working environment. It is also
recommended that a by-pass be used in order to isolate the unit under service and prevent any
unwanted pressurizing to occur during service and maintenance. If required the unit may also be
disconnected at the air inlet and outlet to insure safety.
Before attempting any maintenance operation on the dryer, switch it OFF and wait at least 30
minutes. During operation the copper piping connecting the compressor to the condenser can reach
dangerous temperature able to burn the skin.
DAILY
•Check the proper operation of the condensate drain systems.
•Verify the condenser unit for cleanliness.
EVERY 200 HOURS OR MONTHLY
•With an air jet (Max. 2 bars) blowing from inside towards outside clean the condenser; repeat this
operation blowing from outside towards inside; be careful not to damage the aluminium fins.
•Close the manual condensate drain valve, unscrew the strainer and clean it with compressed air
and a brush. Reinstall the filter properly tight, then open the manual valve.
•At the end, check the operation of the machine.
EVERY 1000 HOURS OR YEARLY
•Verify for tightness all the screws of the electric system and that all the spade (Faston) type
connections are in their proper position.
•Check the conditions of the condensate drain flexible hoses, and replace if necessary.
•At the end, check the operation of the machine.
6.2 SUGGESTED SPARE PARTS
SPARE PARTS CODE LTE3 LTE5 LTE8
Refrigeration compressor 5015135101 1
Refrigeration compressor 5015135103 1
Refrigeration compressor 5015135105 1
Fan motor 5210135005 1
Fan motor 5210135010 1 1
Fan blade 5215000010 1
Fan blade 5215000019 1 1
Fan grid 5225000010 1 1
DMC6 Air Dryer Controller 115V 5620130106 111
DMC6 Temperature Probe L.1000 5625NNN005 11
Lighted main switch 5450SZN010 1 1 1
Condensate drain valve/strainer 64355MN012 111
Condensate drain solenoid valve – body 64320FF006 1 1 1
Condensate drain solenoid valve – coil 115V 64N22MM018 111
By-pass valve 64140SS160 1 1 1
Numbers refers to installed quantity. 

= Suggested spare part. FOR SPARE PARTS ORDERING SPECIFY DRYER LABEL DATA

GB
6.3 TROUBLE SHOOTING
The troubleshooting and resultant service work should be carried out by qualified personnel.
Particular attention must be paid in case of service work on the refrigerating circuit. The
refrigerating fluid, if under pressure, can cause serious injury to skin and eyes.
SYMPTOM POSSIBLE CAUSE - SUGGESTED ACTION
The dryer doesn't start. Check for mains failure.
Verify the electric wiring.
The compressor doesn’t work. Activation of the compressor internal thermal protection - wait for 30
minutes, then retry.
Verify the electric wiring.
Verify/replace compressors electric parts (thermal protection, start
relay, start capacitor).
If the compressor still doesn’t work , replace it.
The fan doesn’t work. Verify the electric wiring.
The DMC6 is out of setting - see DMC6 “Set-Up” section.
The DMC6 is faulty - replace it
If the fan still doesn’t work , replace it.
DewPoint is too high. The dryer is OFF - switch it ON.
The refrigeration compressor doesn’t work - see specific point.
The inlet air is too hot - restore the nominal conditions - install an
aftercooler before the dryer.
The inlet air flow rate is higher than the capacity of the dryer - reduce
the flow rate - restore normal conditions.
The fan doesn’t work - see the specific point.
The ambient temperature is too high or the room aeration is
insufficient - provide proper ventilation.
The condenser unit is dirty - clean it.
The dryer doesn’t drain the condensate - see specific point.
The hot gas by-pass valve is out of setting - contact a refrigeration
engineer to restore the nominal setting.
There is a leak in the refrigeration circuit - contact a refrigeration
engineer.
DewPoint too low. The fan is always ON - DMC6 is faulty - replace it.
The hot gas by-pass valve is out of setting - contact a refrigeration
engineer to restore the nominal setting.
Excessive pressure drop within
the dryer.
The DewPoint is too low - the condensate is frozen and blocks the air
flow - see specific point.
Check for throttling of any flexible connection hoses (if used).
The dryer continuously drains
condensate.
The drain solenoid valve is jammed - remove and clean it.
Verify the electric wiring.
The DMC6 is faulty - replace it.

GB
The dryer doesn’t drain the
condensate.
Verify the electric wiring.
The DMC6 drain time DIPS are not setted - see DMC6 “Set-Up”
section.
The condensate drain service valve is closed - open it.
The condensate drain strainer is clogged - remove and clean it.
The drain solenoid valve is jammed - remove and clean it.
The coil of the condensate drain solenoid valve burned out - replace it.
The DMC6 is faulty - replace it.
The DewPoint is too low - the condensate is frozen - see specific
point.
Water within the line. The dryer is OFF - switch it ON.
Untreated air flows through the by-pass system (if installed) - close
the by-pass.
The dryer doesn’t drain condensate - see specific point.
The DewPoint is too high – see specific point.
6.4 DISMANTELING OF THE DRYER
If the dryer is to be dismantled, it has to be split into homogeneous groups of materials.
We recommend to comply with the safety rules in force for the disposal of each type of material.
The refrigerant fluid contains droplets of lubrication oil released by the refrigeration compressor. Do
not dispose of this fluid in the environment. It has to be drained from the dryer with a suitable device
and then delivered to a collection centre where it will be processed to make it reusable.
7.1 DRYER DIMENSIONS
Attached to this manual.
7.2 EXPLODED VIEW - TABLE OF COMPONENTS
The components table given below refers to the relevant exploded views attached to this manual.
1 Heat exchanger group 9 Cabinet - Front panel
2 Refrigeration compressor 10 Cabinet - Rear panel
3 Condenser unit 11 Cabinet - Cover panel
4 Condenser unit fan 12 Cabinet - Lateral panel
5 Dehydration filter 13 Inlet/Outlet connections
6 Hot gas by-pass valve 14 Lighted main switch
7 Condensate drain valve/strainer 15 DMC6 Air Dryer Controller
8 Condensate drain solenoid valve 16 DMC6 Condensing temperature probe
7.3 ELECTRIC DIAGRAMS
Legend :
IG : Lighted main switch VC : Condenser unit fan
K : Refrigeration compressor DMC6 : Controller
KR : Compressor start-up relay PR : DMC6 probe
KM : Compressor electric motor EVD : Condensate drain solenoid valve
KT : Compressor thermal protection

FRANÇAIS

F
Cher Client,
Nous vous remercions de la confiance que vous nous avez accordée et vous prions de lire attentivement le
présent manuel afin d’exploiter au maximum les caractéristiques de notre produit.
Afin de ne pas travailler dans de mauvaises conditions et d’éviter tout danger pour les opérateurs, nous
vous rappelons qu’il est indispensable d’observer scrupuleusement les directives figurant dans le présent
manuel ainsi que les normes de prévention des accidents en vigueur dans le pays où le matériel est utilisé.
Le présent manuel se réfère aux sécheurs du modèle LTE3, LTE5 et LTE8 refroidissement à eau, avec
l’instrument électronique de commande DMC6. Avant d’être emballé, chaque sécheur à cycle frigorifique de
la série LTE subit une série de tests sévères. Cette phase sert à vérifier l’absence de vices de fabrication et
que la machine remplit correctement les fonctions pour lesquelles elle a été conçue.
Après l’avoir correctement installé conformément aux instructions données dans le présent manuel, le
sécheur est prêt à l’emploi et n’a besoin d’aucun réglage. Son fonctionnement est entièrement automatique;
son entretien se limite à quelques contrôles et aux opérations de nettoyage décrites en détail dans les
chapitres suivants.
Le présent manuel doit être conservé afin de pouvoir le consulter à tout moment et fait partie
intégrante du sécheur que vous avez acheté.
En raison de l’évolution permanente de la technique, nous réservons le droit d’apporter toute modification
nécessaire sans préavis.
N’hésitez pas à nous contacter en cas de problème ou pour tout complément d’information.
PLAQUE D’IDENTIFICATION
Modèle 
No. de série 
Code 
Débit Nominale d’Air 
Pression Maximum d’Air 
Température Maximum d’Air 
Température Ambiante 
Réfrigérant (Type/Quantité) 
Pression de Project Refrig. HP/LP 
Alimentation électrique 
Puissance électrique nominale 
Fusible Maximum 
Produit 
Les caractéristiques principales
de la machine figurent sur la
plaque d’identification, qui se
trouve dans la partie postérieure
du sécheur. Lors de l’installation,
remplir le tableau en reportant
celles figurant sur la plaque
d’identification. Les
caractéristiques retranscrites
devront toujours être
communiquées au constructeur
ou au revendeur pour demander
des informations, des pièces de
rechange, etc., même pendant la
période de garantie.
L’élimination ou la détérioration
de la plaque d’identification
annule tout droit à la garantie.
Model
Serial No.
Code
Max Air Pressure
Max Inlet Air Temp.
Ambient Temp.
Refrigerant
Refrig. Design Pres. HP/LP
Electric Supply
Electric Nominal Power
Fuse Max.
Manufactured
psig
°F
°F
type/oz
psig
V/ph/Hz
W/A
A
Nominal Flow Rate scfm
CONDITION DE GARANTIE
La garantie couvre, pendant 12 mois à partir de la date de mise en service et une durée ne dépassant pas
14 mois à compter de la date d’expédition, les éventuelles pièces défectueuses à l’origine qui seront
réparées ou remplacées gratuitement. Sont exclus les frais de transport, de voyage, de logement et de
nourriture de nos techniciens. La garantie exclut toute responsabilité pour des dommages directs ou
indirects à des personnes, des animaux et/des objets causés par un usage ou un entretien inadéquat et se
limite seulement et uniquement aux vices de fabrication.
Le droit à la réparation sous garantie est subordonné au respect des instructions d’installation, d’utilisation
et d’entretien figurant dans le présent manuel. La garantie devient immédiatement nulle en cas de
modification ou altération du sécheur, même si minime. Lors de la demande d’intervention sous garantie, il
est nécessaire de communiquer les données figurant sur la plaque d’identification du produit.

F
1. NORMES DE SECURITE
1.1 Définition des symboles utilisés
1.2 Avertissements
1.3 Utilisation correcte du sécheur
2. INSTALLATION
2.1 Transport
2.2 Lieu d’installation
2.3 Schéma d’installation
2.4 Facteur de correction
2.5 Branchement à la prise d’air comprimé
2.6 Branchement à l’installation électrique
2.7 Evacuation de la condensation
3. MISE EN SERVICE
3.1 Préliminaires à la mise en service
3.2 Première mise en service
3.3 Marche et arrêt
4. CARACTERISTIQUES TECHNIQUES
4.1 Caractéristiques techniques sécheur série LTE3, LTE5 et LTE8
5. DESCRIPTION TECHNIQUE
5.1 Description du fonctionnement
5.2 Schéma fonctionnel
5.3 Compresseur frigorifique
5.4 Condensateur
5.5 Filtre déshydrater
5.6 Tuyau capillaire
5.7 Evaporateur
5.8 Vanne by-pass gaz chaud
5.9 Echangeur air - air
5.10 Séparateur de condensation
5.11 DMC6 Air Dryer Controller
6. ENTRETIEN, RECHERCHE DES AVARIES, PIECES DE RECHANGE ET DEMOLITION
6.1 Contrôles et entretien
6.2 Pièces de rechange conseillées
6.3 Recherche des avaries
6.4 Démolition du sécheur
7. LISTE DES ANNEXES
7.1 Dimensions sécheurs
7.2 Vue éclatée
7.3 Schéma électrique