EN - Operating Instruction

O11100000009I
03.2019

EN – Compressed Air-Dryer

BURAN
DC 0020 AB – DC 0850 AB
Type Code

Series BURAN

Type code Model Type no. Material no.

Version air-cooled DC 0020 AB 1110 A 1CY1110000009I

DC 0035 AB 1111 A 1CY1111000009I

50-60 Hz
DC 0050 AB 1112 A 1CY1112000009I
DC 0065 AB 1113 A 1CY1113000009I
DC 0085 AB 1114 A 1CY1114000009I
DC 0105 AB 1115 A 1CY1115000009I
DC 0125 AB 1116 A 1CY1116000007I
DC 0150 AB 1117 A 1CY1117000007I
DC 0180 AB 1118 A 1CY1118000007I
DC 0225 AB 1119 A 1CY1119000007I
DC 0300 AB 1120 A 1CY1120000007I

50 Hz
DC 0360 AB 1121 A 1CY1121000007I
DC 0450 AB 1122 A 1CY1122000007I
DC 0550 AB 1123 A 1CY1123000007I
DC 0650 AB 1124 A 1CY1124000007I
DC 0750 AB 1125 A 1CY1125000007I
DC 0850 AB 1126 A 1CY1126000007I
DC 0125 AB 1116 A 1CY1116000008I
DC 0150 AB 1117 A 1CY1117000008I
DC 0180 AB 1118 A 1CY1118000008I
DC 0225 AB 1119 A 1CY1119000008I
DC 0300 AB 1120 A 1CY1120000008I

60 Hz
DC 0360 AB 1121 A 1CY1121000008I
DC 0450 AB 1122 A 1CY1122000008I
DC 0550 AB 1123 A 1CY1123000008I
DC 0650 AB 1124 A 1CY1124000008I
DC 0750 AB 1125 A 1CY1125000008I
DC 0850 AB 1126 A 1CY1126000008I

Original instruction are in ENGLISH!

Technical modifications are subject to change without notice; errors not excluded.

EN_2
 Table of contents

Page
Type code EN_2
Part 1 Important user information 1.1 General Notes EN_4
1.2 Legal requirements for the user EN_5
1.3 Safety regulations EN_6
1.4 Refrigerant handling EN_7

All safety notes in this operating instruction which may cause harm to personnel or
equipment, when ignored, are marked by the following symbols:

General danger symbol Electrical danger symbol

1.5 First Aid EN_8

1.6 Disposal EN_8
Part 2 Installation 2.1 Transportation EN_9
2.2 Requirements on the place of EN_9
installation
2.3 Installation (Mounting) EN_9
2.4 Compressed air connection EN_10
2.5 Electric Connection EN_10
2.6 Connection condensate drain EN_11
Part 3 Description 3.1 Designation EN_12
3.2 Intended use EN_12
3.3 Unit layout EN_12
3.4 Electronic regulator EN_12
3.5 Nominal power of CA-Dryer EN_13
3.6 Principle of operation EN_13
3.7 Mode of operation EN_13
3.8 Condensate draining EN_14
Part 4 Operation 4.1 Commissioning EN_15
4.2 Starting EN_15
4.3 Operation EN_15
4.4 Stopping EN_17
Part 5 Maintenance 5.1 Maintenance EN_18
5.2 Troubleshooting EN_19
5.3 Spare parts list EN_25
Part 6 Technical data 6.1 Technical data EN_26
Part 7 Appendix legend 7.1 Appendix legend EN_27
Appendix Apx 1 Units layout
Apx 2 Spare parts view
Apx 3 Wiring diagrams
Apx 4 PI diagram

EN_3
Part 1 Important User Information

1.1 General notes • This compressed air-dryer is called CA-dryer in the

following.

• The Company does not accept responsibility if safety

regulations are not met during handling, operation,
maintenance and repair, even though these are not strictly
stated in these operating instructions.

• We recommend the notice of these operating instructions

verified by the operating personnel in writing (personnel file).

• We recommend translation of these operating instruction

into native language of foreign workers.

• The usability and the life cycle of the compressed air-dryer

as well as the avoidance of premature repairs depends on
proper operation, maintenance, care and competent repair
under consideration of these operating instructions.

• Hints to figures and locations are in brackets, e.g. (Fig.3/7).

• Due to our position as suppliers of components we do not

always know the final usage and total range of products’
application. We constantly improve our products to the latest
state of science and technology and therefore, we assume
that our product are free from defects in sense of product
liability. However, it cannot be excluded that during faulty
operation in critical areas of application especially at danger
to life and limb of persons involved, additionally safety
measures may be necessary. Therefore, we request the
user of our components / units, to ensure in his own interest,
to inform us about the application of our products in order to
initiate additional safety measures, if necessary.

• Keep this manual for future reference.

EN_4
 Important User Information Part 1

1.2 Legal requirements for the user

1.2.1 Classification EU • Due to classification into category 2 (types 1125A and

regulation 2014/68 1126A) according to EC-Pressure Equipment directive,
the CA-Dryer are “systems to be monitored”.

1.2.2 Check of working • Before starting the CA-Dryer, the user has to check the
materials working materials and record this accordingly.

1.2.3 Periodical checks • The user of the CA-Dryer has to find out the test periods
of the complete unit and the unit parts on base of a safety
related technical evaluation.

1.2.4 Instruction EN 378-1 • The user has to provide the instructions for the operators
as well as their information of the used working media. A
yearly instruction is mandatory.

1.2.5 Short Operating • A „Short Operating Instruction“ must be prepared by the

Instruction EN 378-2 user and positioned next to the machine.

1.2.6 Documentation EN • The user is committed to create a unit record of the

378-4.3.1 EC refrigerating plant when required by regulation 517/2014.
regulation 842/2006 A guideline can be provided by the service.

1.2.7 Maintenance EN 13 313 • Maintenance has to be provided by qualified personnel

only.

EN_5
Part 1 Important User Information

1.3 Safety Regulations

Attention!
The operator has to observe the national working-, operating-
and safety regulations. Also existing internal factory regulations
must be met.
Maintenance and repair work must only be carried out by
specially trained personnel and, if necessary, under supervision
of a person qualified for this work.

• Protective or safety devices must not be removed, modified

or readjusted temporarily or permanently.
• User proper tools for maintenance and repair work only.
• Use original spare parts only.

Attention!
All maintenance and repair works must only be executed at
stopped machine, disconnected power supply and pulled mains
plug. Ensure that the CA-dryer cannot be switched on by
mistake.

• Prior to dismounting a part under pressure disconnect the

CA-dryer from all pressure sources and depressurize the CA-
dryer.

• Do not use inflammable solvents for cleanings.

• Keep the environment absolutely clean during maintenance

and repair works. Keep free of dirt by covering the parts and
free openings with clean cloth, paper or adhesive tape.

• Never weld at the pressure vessel or modify it in any way.

• Ensure that no tools, loose parts or similar are left in the

system.

• The casing of the CA-Dryer must not be stepped on.

• The CA-Dryer must not be used as deposit station.

• CA-Dryer must only be operated within the limits stated in the

nameplate.

• Condensate drain system access opening is intended to

manage the drain only (display visibility and test button) : a
deeper access inside the CA-Dryer may cause injuries due to
refrigerant hot piping.

EN_6
 Important User Information Part 1

1.4 Refrigerant • Wear eye protection and protective gloves.

handling
• Avoid contact of liquid refrigerants with your skin (frostbite).
• Do not inhale refrigerant vapours.
• To avoid higher concentrations, all work rooms must be
ventilated very well. The opening of windows and doors may
not be sufficient, so an exhausting system must be used
directly at the supply point or near the floor.
• Do not smoke, because fire might decompose the
refrigerant. The resulting substances are toxic and must not
be inhaled.
• Do not have refrigerants escaped during filling or repair
work. Cover with tape.
• Leave the room immediately and only enter after the room
has been sufficiently ventilated when refrigerant
concentrations (e.g. pipe line leakages) appear suddenly.
• Execute welding and soldering works on refrigerating
systems in well ventilated rooms only. Refrigerants will be
decomposed in flames as well as in electrical arcs.
• The resulting decomposition products are toxic.
• Before welding and soldering at refrigerating systems, the
refrigerant must be removed.
• A stinking smell points to decomposition of refrigerant due to
overheating:
- leave room immediately;
- ventilate room very well.

1.4.1 Refrigerant • refrigerant charging and discharging operations shall be

charging and made by qualified personnel only.
discharging
• Do not throw out refrigerant in the environment during
discharge operation. Use proper refrigerant recovery
system.
• In case of refrigerant charging requirement, use only
refrigerant type and quantity as indicated in the CA-Dryer
nameplate.
1.4.2 Refrigerant characteristics

Refrigerant Chemical formula TLV GWP

R134a – HFC CH2FCF3 1000 ppm 1430

R32/125/134a (23/25/52)
R407C – HFC 1000 ppm 1773.85
CHF2CF3/CH2F2/CH2FCF3

EN_7
Part 1 Important User Information

1.5 First aid

1.5.1 General notes: • Immediately bring casualty into the fresh air or into a well
ventilated room.
• Assistants must pay attention to self-protection!
• Take off contaminated clothes.
• Never leave the casualty unattended!
• CALL THE DOCTOR and inform him that accident has
been caused by refrigerants, as to be read on the name
plate!

1.5.2 After inhaling: • Bring casualty into the fresh air, keep him warm, and let him
relax.
• At breathlessness: Oxygene therapie
• At apnoea: Resuscitation
• Mouth-to-nose resuscitation, mouth-to-mouth resuscitation
or with equipment.
• Medical treatment necessary

1.5.3 After skin contact: • At skin contact, clean with water and soap immediately.
• After contact with the fluid, undercooled skin areas must be
cooled with warm (not hot) water.

1.5.4 After eye contact: • Flush well opened eye with running water for at least 10
minutes.
• Contact doctor.

1.5.5 Notes for the • Inform doctor about the used refrigerant.
doctor: • After inhalation, deep breathing of a corticoid emulsive
dosing aerosol (e.g. Ventolair) as soon as possible.
• Prohobition of using adrenergic drugs.
• Prophylactic pulmonary edema after inhalation of
decomposition products / fire gases

1.6 Disposal • When disposing of used devices, pay attention to oil and
refrigerant in the hermetical sealed refrigerating circuit of
CA-dryers. Therefore, before dismounting, these operation
media must be disposed by a special company.

• The used materials are listed on the recycling label inside

the CA-dryer.

Attention!
Do not dispose waste oil into the environment. Do not mix with
household rubbish and do not burn it unauthorized plants.

• The escape of refrigerant into the atmosphere must be

prevented by appropriate measures.

EN_8
 Installation Part 2

2.1 Transportation Transportation has to be carried out in the normal operating

position of the CA-dryer.
For a short time an inclined position of 45° is allowed.
Handle with care. Heavy blows could cause irreparable damage.

2.2 Requirements on At the site of installation, the CA-dryer can be installed without
the place of anchorage or special foundation at the location desired.
installation The CA-dryer is provided for an ambient temperature of 25 °C.

Attention!
To avoid corrosion on components of the CA-dryer the
compressed and ambient air must be free of aggressive parts.
The CA-dryer are provided for inside mounting.
Deviating conditions require the consultation of the
manufacturer.

To prevent the condensate from freezing the room temperature

must not drop below +2 °C.

Attention!
At different ambient conditions pay attention to the layout data!

2.3 Installation The CA-dryer must be installed that accessibility to the front
(mounting) panel is ensured. Furthermore leave space for service purposes
on both sides of the CA-dryer (fig.2.3a).
Wall mounting is possible with types 1110A-1116A (fig.2.3b).

Fig. Installation of CA-dryer

2.3a

EN_9
Part 2 Installation

Fig. Preparation wall

2.3b mounting

2.3.1 Version air cooled The cooling air is sucked in by the refrigerant condenser (Apx
1/3) and discharged at the right side (Apx 1/4). Both areas must
be kept free and must non be obstructed.

2.4 Compressed air The connection must be executed acc. to marking at the CA-
connection dryer (Apx 1/1 + 1/2).
For service purposes the installation of a bypass line in
recommended (additional equipment).

Attention!
Before mounting the CA-dryer, welding residual, rust or other
pollution must be removed from the pipelines to be connected. If
pollution cannot be excluded, proper filter system must be
installed.
The compressed air pipes must be installed stress-free.
Expansion joints are recommended in case of vibrations and
pulsations.
CA-dryer must only be operated within the temperature and
pressure limits stated on the nameplate.
Prior to use, the user must fit safety / pressure relief devices on
the CA-system.

2.5 Electric connection The CA-dryers are completely equipped and wired. They merely
have to be connected to a power supply. The CA-dryer are to be
protected by slow-blow fuses as defined in the wiring diagram.
Operating voltage: according to name plate data.

EN_10
 Installation Part 2

2.6 Connection A hose already pre-mounted at the condensate drain leads the
condensate drain condensate out of the CA-dryer (Apx 1/5). A connection by the
costumer has to be carried out corresponding to the local
conditions.

The CA-dryers separates water as well as oil from the

compressed air. The water/oil mixture must not be led into the
sewage. Water and oil must be separated by suitable
separators (additional equipment).

A minimum operating pressure of 2 bar is required for safe

operation.

Attention!
Route outflow so that persons or objects will not be struck by
condensate (condensate outlet at operating pressure)!

2.6.1 Connection The condensate drain pipe (fig.2.6/1) may be fixed to the wall
condensate with a rising slope of maximum 5m. thereby the minimum
draining operating pressure increases for 0,1 bar per meter. The
collecting pipe (fig.2.6/2) has to have at least the cross-section
of the condensate outlet.

Fig. Connection
2.6 condensate draining

EN_11
Part 3 Description

3.1 Designation Refrigerating compressed air-dryer (CA-dryer).

Version see type code (page 2).
3.2 Intended use Only compressed air will be dehumidified by the CA-dryer.

3.3 Unit Layout See Appendix Apx 1 for CA-dryer components which are
accessible from outside.
3.3.1 Symbols
Compressed air inlet

Compressed air outlet

Before maintenance works are to be executed at the CA-

dryer, the unit must be disconnected from the power supply.

Risk of injury if the CA-dryer is not disconnected from the

power supply because of a freely rotating fan blade.

The refrigerant compressor of the refrigeration system heats

up during operation, so a risk of burn injuries is given at
maintenance works

Condensate drain

3.4 Electronic The electronic regulator DDS7 is a controller specially designed for
regulator CA-dryers. It operates on the basis of the micro processors and
performs three functions:
- Pressure dew point display
- Pressure dew point alarm
- Refrigerant condenser fan control
Fig. Symbols 2 3 4
3.4 electronic
regulator
ON

set
PQS0085_1

8 1 5 7 6 9
1 10x Led green : Pressure dew point indication
2 Green area : Pressure dew point normal
3 Red area : Pressure dew point high
4 Led green : CA-dryer on
5 Led red : ALARM active
6 Led yellow : DRAIN MAINTENANCE required
7 Led yellow : FAN - refrigerant condenser fan ON
8 Set key
9 Up key

EN_12
 Description Part 3

3.5 Nominal power of The nominal power of the CA-dryer mentioned in the technical
CA-dryer data is related to a working pressure of 7 bar, a compressed air
inlet temperature of 35 °C as well as an ambient temperature of
25 °C acc. to ISO 7183.
Lower working pressure, higher compressed air inlet
temperature and/or higher ambient temperatures overload the
compressor which causes to an increased pressure dewpoint
and the compressor can be stopped by internal safety devices.
At essentially deviating operating conditions, contact the
deliverer of the CA-dryer for support.

3.6 Principle of The CA-dryer includes a refrigerant system cooling the

operation compressed air flow. The steam saturation limit is lowered
causing condensate to fall out, which is removed by the
condensate drain.
The higher the cooling temperature difference of the
compressed air, the higher the amount of condensate.
The lower the cooling temperature of compressed air, the lower
the moisture content.
The lower limit of the compressed air cooling results from the
working principle of the CA-dryer, which is based on the
moisture separation in liquid form.

3.7 Mode of operation

3.7.1 Compressed air The compressed air precooled in the Aftercooler and saturated
side with moisture enters into the CA-dryer and is precooled in the
first cooling stage, the air-to-air heat exchanger without
additional energy. Cooling is carried out in counter flow to the
already cooled air heated during this process.
The cooling to the pressure dew point is performed in the
second cooling stage, the refrigerant-to-air heat exchanger
cooled by the refrigerant system installed. Subsequently, the
cooled compressed air is reheated in the air-to-air heat
exchanger as already described.

3.7.2 Refrigerant side The refrigerant is injected into the refrigerant-to-air heat
exchanger where it evaporates, thereby the compressed air is
cooled. The hot gas by-pass valve regulates the cooling
temperature and keeps the pressure dew point constant in
nearly all capacity stages. The refrigerant compressed by the
motor compressor is condensed within the condenser and is
available for the evaporation again.

3.7.3 Pressure dew point Any compressed air dryer can be operated under partial load
control due to lower compressed air flow or lower compressed air inlet
temperature in the range of 0 to 100% load in permanent
operation.

EN_13
Part 3 Description

3.8 Condensate The condensate drain (fig.3.8a) automatically drains the

draining condensate. A minimum pressure of 2 bar is required for safe
operation.
3.8.1 Condensate drain Once the container has filled with condensate, so that the
sensor-controlled capacitive level sensor emits a signal, the internal solenoid valve
opens and the condensate is forced by the working pressure into
the discharge pipe.
The condensate drain electronic system ensures the closing of
the outlet opening before any compressed air can escape.

Fig. Condensate drain

3.8a General

Fig. Condensate drain

Type 1110A-1124A
3.8b Operation panel
The power LED is lit up green when operating voltage is being
applied.
- Ready for operation. Power On
If the condensate discharge is not functioning
properly, the valve will keep opening (about
every 2 seconds) so as to clear the fault
automatically, if possible.
- Test valve function (manual drainage).
Press button for approx. 2 seconds. In
response to longer pressing, the valve will
keep opening. Do not use this function for
continuous draining!
Type 1125A-1126A
The operating states are indicated by two LED’s.
- Ready for operation. Power on.

- Malfunction / Alarm.

- Test of valve function and manual

drainage: briefly press button.
- Press button for >1 minute to test the
alarm function.

EN_14
 Operation Part 4

4.1 Commissioning After installation the CA-dryer is supplied with power via the
power cable or by operating the main switch (Apx 1/6).

Attention!
Before operating the operation switch (Apx 1/6), a waiting
period of at least 6 hours is absolutely necessary.

4.2 Starting The CA-dryer is switched on via operation switch (Apx 1/6).
After approx. 5 minutes the compressed air admission is
possible by connecting the compressed air compressor.
The CA-dryer is designed for continuous operation and may
remain switched on during periods of no load, as it adapts to the
required performance automatically.

4.3 Operation Operation is indicated by the led “ON” of the electronic regulator
(fig.4.3/4)
The pressure dew point indication (fig.4.3/1) is showing the
pressure dew point reached by the CA-dryer.

4.3.1 Electronic regulator 2 3 4

- Changing factory
setting
Fig.4.3
ON

set
PQS0085_1

8 1 5 7 6 9
1. Keep pressed SET key (8) for 2 seconds to change from
display into setup mode, then release it.
2. First data is ALARMON, shortly press SET key (8) to go to
data DRAINMAINTENANCE, shortly press SET key (8) to return to
data ALARMON.
3. In order to adjust actual data, keep pressed SET key (8) and
press UP key (9).
4. During the setup, led flashing will identify which data is
displayed :
- led ON (4) and ALARM (5) flashing = ALARMON data
- led ON (4) and DRAIN MAINTENANCE (6) flashing =
DRAINMAINTENANCE data
5. Setup exit is automatic after 2 minutes or by pressing UP key
(9).

EN_15
Part 4 Operation

4.3.2 Electronic regulator ALARMON

- Data range EIC3 temperature too high setpoint (ALARMON) is
adjustable in the range +2 … 20 C (factory setting 18°C),
resolution 2K, hysteresis -2K.
(ie : ALARMON = 18°C; Alarm is active with EIC3
temperature ≥18°C for at least 5 minutes; Alarm condition
resets immediately with EIC3 temperature <16°C).

DRAINMAINTENANCE
It defines the action of alarm contact when DRAIN MAINTENANCE
time is expired (factory setting 8000 hours).
- 1st led of dew point indication bar ON = alarm contact
switches at expiring of maintenance time.
- 2nd led of dew point indication bar ON = alarm contact does
not switch at expiring of maintenance time (factory setting).

4.3.3 Electronic regulator This function shows the total operating hours of the dryer
- Hour counter through the dew point indication bar (max displayable value
99900 hours).
- Keep pressed both SET key (8) and UP key (9) for 5
seconds, then release them.
- Led ON (4) is lit and a certain numbers of leds of dew point
indication bar are light up. The number of leds lit define the
1st digit of hour counter (ie : n.0 leds lit → 1st digit =0)
- Press UP key (9)
- Led ALARM (5) is lit and a certain numbers of leds of dew
point indication bar are light up. The number of leds lit define
the 2nd digit of hour counter (ie : n.3 leds lit → 2nd digit = 3)
- Press UP key (9)
- Led DRAIN MAINTENANCE (6) is lit and a certain numbers of
leds of dew point indication bar are light up. The number of
leds lit define the 3rd digit of hour counter (ie : n.8 leds lit →
3rd digit = 8)
Total operating hours : 0 3 8 x 100 (fixed multiplying ratio) =
3800 hours
- Press UP key (9) repeatedly to scroll the displaying of 3
digits again.
- The exit of hour counter is automatic after 30 seconds or by
pressing SET key (8).

EN_16
 Operation Part 4

4.3.4 Electronic regulator This function shows the elapsed time from last reset of timer
- Drain dedicated to DRAIN MAINTENANCE (factory setting 8000 hours).
maintenance timer The elapsed time is shown through the dew point indication
bar.
- Keep pressed UP key (9)
- Led DRAIN MAINTENANCE (6) is lit and a certain numbers of
leds of dew point indication bar are light up. Each led define
a range of elapsed hours from last reset.
- 1st led = 0…800 hours
- 2nd led = 801…1600 hours
- 3rd led = 1601…2400 hours
- 4th led = 2401…3200 hours
- 5th led = 3201…4000 hours
- 6th led = 4001…4800 hours
- 7th led = 4801…5600 hours
- 8th led = 5601…6400 hours
- 9th led = 6401…7200 hours
- 10th led = 7201…8000 hours
- 10th led flashing = >8001 hours
ie : 5500 hours are passed from last reset of timer, leds 1…7
are lit.
- Release UP key (9) to return to dew point displaying.
After expiring time (8000 hours) leds 1…10 are lit and DRAIN
MAINTENANCE is triggered. Contact the SERVICE CENTER for
reset.

4.4 Stopping At standstill periods, the CA-dryer is switched off with the
operation switch (Apx 1/6).
For longer standstill periods or service works, the CA-dryer is
switched off by pulling the power plug (Apx 1/8).

EN_17
Part 5 Maintenance

5.1 Maintenance

Attention!
Prior to any maintenance works all safety regulations for
electrical systems and units must be observed (see also
part 1).

Maintenance intervals highly depend on the model of

operation and the ambient conditions on site, the intervals
below are only to be understood as general
recommendations.
5.1.1 Daily maintenance a) Check function of condensate drain.
Check, if water is drained.
Test valve function (manual drainage):
Press button for approx. 2 seconds.
In response to longer pressing, the valve will keep
opening.
Do not use this function for continuous draining!
b) Monitor pressure dew point (fig.3.4/1). In case of
differences to normal operation (see 5.2.2, 5.2.3).

c) Verify the refrigerant condenser for cleanliness.

5.1.2 Weekly Inspection and cleaning of condensate draining system if

maintenance necessary.

5.1.3 Yearly maintenance The led “DRAIN MAINTENANCE” is lit (fig.4.3/6) : replace
or every 8000 hours drain service kit, then contact the SERVICE CENTER to reset
(which comes first) this warning.
If the service kit replacement occurs before led signalling
(fig.4.3/6), contact the SERVICE CENTER to reset the timer
of drain maintenance.
For further information see separate instruction in the service
kit.
5.1.4 Periodic checks at Circuits with refrigerant charge exceeding 5 Tons of CO2
refrigerant system equivalent (as stated in the nameplate) are subject to
periodic leak tightness check as provided by EU regulation
517/2014.
5.1.5 Periodic checks at CA-Dryers types 1125A and 1126A are included into the
pressure vessels pressure vessel guideline category II, fluid group 2 and have
a maximum pressure of 14 bar.
Periodic checks must be done according to National
legislations and the determinations of the user.

Attention!
Maintenance work must be performed at the depressurized
condensate drain only. For this purpose, the installation of a
bypass line is recommended.

EN_18
 Maintenance Part 5

5.2 Trouble shooting

Symptom Cause  Remedy

5.2.1 No Function 1. Check and ensure power supply if necessary.

2. If the power supply is ok, contact service or send CA-dryer
to the manufacturer.
5.2.2 Pressure dew point 1. Temporary overload of the CA-dryer due to non-uniform
too high compressed air consumption  check CA-dryer’s capacity
(see 3.4).
2. Ambient temperature too high or the room aeration is
insufficient  reduce temperature and/or provide proper
ventilation.
3. CA-dryer volume flow too high  reduce volume flow; 
check whether CA-dryer’s capacity is properly selected,
increase CA-dryer’s capacity.
4. EIC3 dew point sensor doesn’t detect the temperature
properly  ensure the sensor is pushed into the bottom of
probe well or EIC3 dew point sensor need to be replaced.
5. Refrigerant condenser fan is never running  see 5.2.6.
6. Refrigerant condenser is polluted  clean condenser.
7. Hot gas by-pass valve is out of setting  contact service.
8. Leak in the refrigerating fluid circuit  contact service.
5.2.3 Pressure dew point 1. Ambient temperature is too low  restore normal condition.
too low 2. Refrigerant condenser fan is always on and electronic
regulator’s FAN led is flashing  see 5.2.11.2.
3. Switch off CA-dryer and maintain compressed air flow. After
approx. half an hour, the pressure dew point will return to
normal value. Restart the unit. If the pressure dew point
decrease again contact service.
5.2.4 Water in 1. Condensate drain is not drained sufficiently  see 5.2.12.
compressed air 2. CA-operating pressure too low  increase operating
system pressure;  check whether CA-dryer’s capacity is properly
selected, increase CA-dryer’s capacity.
3. Temporary overload of the CA-dryer due to non-uniform
compressed air consumption  check CA-dryer’s capacity
(see 3.4).
4. CA-dryer volume flow too high  reduce volume flow; 
check whether CA-dryer’s capacity is properly selected,
increase CA-dryer’s capacity.
5. CA-inlet temperature too high  restore normal conditions.
6. (Only with installed bypass line) Bypass valve is open 
close bypass valve.
7. (Only with installed bypass line) Bypass valve is leaking
 seal or replace bypass valve.

EN_19
Part 5 Maintenance

5.2.5 Stopping CA-dryer 1. Compressor’s internal overload protection (klixon) is tripped

during operation  eliminate cause of trouble (see 3.4) or contact service.
CA-dryer will restart automatically after compressor has
cooled down.
Note: the immediate restarting of the unit is not possible
because the compressor’s overload protection requires a
minimum time to cool down to an acceptable operating
temperature.
2. Compressor or starting device is defective  contact
service.
3. CA-dryer volume flow too high  reduce volume flow; 
check whether CA-dryer’s capacity is properly selected,
increase CA-dryer’s capacity.
4. CA-inlet temperature too high  restore normal conditions.
5. Ambient temperature too high or the room aeration is
insufficient  Reduce temperature or provide proper
ventilation.
6. Refrigerant condenser fan is never running  see 5.2.6.
7. Refrigerant condenser is polluted  clean condenser.
8. CA-operating pressure too low  increase operating
pressure;  check whether CA-dryer’s capacity is properly
selected, increase CA-dryer’s capacity.
9. (type 1120A-1126A) Safety thermo-switch FTS is tripped 
see 5.2.8.
10. (type 1122A-1126A) Safety high pressure-switch FPA is
tripped  see 5.2.9.
11. (type 1122A-1126A) Safety low pressure-switch FPB is
tripped  see 5.2.10.
5.2.6 Refrigerant 1. Check and ensure electric wiring.
condenser fan is 2. Fan’s internal overload protection is tripped  eliminate
never running cause of trouble (see 3.4) or contact service. Fan will restart
automatically after it has cooled down.
3. (type 1110A-1121A) Electronic regulator is defective 
contact service.
4. (type 1122A-1126A) Electronic regulator and / or relay KF
is defective  contact service.
5. Leak in the refrigerating fluid circuit  contact service
5.2.7 High differential 1. CA-dryer volume flow too high  reduce volume flow; 
pressure at CA-side check whether CA-dryer’s capacity is properly selected,
increase CA-dryer’s capacity.
2. CA-operating pressure too low  increase operating
pressure;  check whether CA-dryer’s capacity is properly
selected, increase CA-dryer’s capacity.
3. Pressure dew point too low  see 5.2.3.
4. Condensate drain is not drained sufficiently  see 5.2.12.
5. Heat exchanger polluted  contact service.

EN_20
 Maintenance Part 5

5.2.8 Safety thermo- 1. CA-dryer volume flow too high  reduce volume flow; 
switch FTS is check whether CA-dryer’s capacity is properly selected,
tripped increase CA-dryer’s capacity.
(type 1120A-1126A) 2. CA-inlet temperature too high  restore normal conditions.
3. Ambient temperature too high or the room aeration is
insufficient  reduce temperature and/or provide proper
ventilation.
4. Refrigerant condenser fan is never running  see 5.2.6.
5. Refrigerant condenser is polluted  clean condenser.
6. CA-operating pressure too low  increase operating
pressure;  check whether CA-dryer’s capacity is properly
selected, increase CA-dryer’s capacity.
7. Leak in the refrigerating fluid circuit  contact service.
8. Safety thermo-switch FTS is defective  contact service.
Note: Safety thermo-switch FTS require a reset : press
reset button (fig.5.2.8).
Fig. Safety thermo-
5.2.8 switch FTS reset
button

EN_21
Part 5 Maintenance

5.2.9 Safety high 1. Ambient temperature too high or the room aeration is
pressure-switch insufficient  reduce temperature and/or provide proper
FPA is tripped ventilation.
(type 1122A- 2. Refrigerant condenser fan is never running  see 5.2.6.
1126A) 3. Refrigerant condenser is polluted  clean condenser.
Note: Safety high pressure-switch FPA require a reset :
press reset button (fig.5.2.9).
Fig. Safety high
5.2.9 pressure-switch
FPA reset button

5.2.10 Safety low Leak in the refrigerating fluid circuit  contact service.
pressure-switch
FPB is tripped
(type 1122A-
1126A)

EN_22
 Maintenance Part 5

5.2.11 Electronic regulator DDS7

Symptom Cause  Remedy
5.2.11.1 Alarm led and
display 1st (left) ON

and 10th (right)

led are flashing set

PQS0085_2
EIC3 dew point sensor is defective  replace it.
5.2.11.2 Alarm led and
Fan led are ON

flashing
set
PQS0085_3

EIC4 or EIC5 fan control sensor is defective  replace it. Note:

refrigerant condenser fan is always running and led FAN (7) flashes.
5.2.11.3 Alarm led is
flashing and ON

display led is
lighted set
PQS0085_4

Pressure dew point alarm (higher than ALARMON setpoint)  see 5.2.2
and 4.3 Note: alarm becomes active 5 minutes later with dewpoint
temperature continuously higher than ALARMON setpoint. Alarm
automatically reset when dewpoint temperature decrease of 2°K below
ALARMON setpoint.
5.2.11.4 Alarm led and
display 1st (left) ON

led are flashing

set
PQS0085_5

Pressure dew point too low (lower than -1°C)  see 5.2.3 Note:
alarm becomes active 5 minutes later with dewpoint temperature
continuously lower than -1°C. Alarm automatically reset when dewpoint
temperature rise up to >+1°C
5.2.11.5 Display 10th
(right) led is ON

flashing
set
PQS0085_7

Pressure dew point over range (higher than 24°C)  see 5.2.2
Note: Dew point alarm could occur or not. Alarm becomes active 5
minutes later with dewpoint temperature continuously higher than
ALARMON setpoint.
5.2.11.6 Alarm led and
drain ON

maintenance led
are flashing set
PQS0085_6

The time of drain maintenance timer is expired  contact SERVICE

CENTER for drain replacement and reset the timer.

EN_23
Part 5 Maintenance

5.2.12 Condensate drain

Symptom Cause  Remedy

5.2.12.1 LED not lighting

up

Power supply faulty.

Power supply board defective.
- Check voltage on type plate.
- Check connections.
- Check of the circuit boards for possible damage to be carried
out by qualified personnel only.
5.2.12.2 Pressing of test
button, but no
condensate
discharge

Feed and / or outlet line shut off or blocked.

Worn parts (seals, valve core, diaphragm).
Power supply board defective.
Service unit defective.
Dropping below necessary minimum pressure.
Maximum pressure exceeded.
- Check feed line and outlet line
- Check if valve opens audibly (press test button several times).
- Check of the circuit board for possible damage to be carried out
by qualified personnel only.
- Check operating pressure.
5.2.12.3 Condensate
discharge only
when test button
is being pressed

Feed line with insufficient slope; cross-section too small.

Excessive condensate quantities.
Service unit extremely dirty.
- Lay feed line with adequate slope
- Replace service unit.
5.2.12.4 Device keeps
blowing off air

Service unit defective or dirty.

- Replace service unit.

EN_24
 5.3

Dryer type
ID Ref. Description

1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
Spare parts list

1/230V±10%/50-60Hz 1/230V±10%/50Hz 1/230V±10%/60Hz

1 W100 Complete heat exchanger 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

2 PSLO Low pressure-switch 1 1 1 1 1 1 1 1 1 1
3 TSAH Safety thermo-switch 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 PSAH High pressure switch 1 1 1 1 1 1 1 1 1 1
6 V100 Refrigerant compressor 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
7 V400 Hot gas by-pass regulator 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
8 W200 Refrigerant condenser 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
inside dryers.

9 M200 Complete fan 1 1 1 1 1 1 1 1

9,1 M200 Fan motor 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

EN_25
9,2 M201 Fan blade 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
9,3 M203 Fan grid 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
10 F100 Filter drier 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
12 EIC3-EIC4 Temperature probe 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1
37 EIC5 Pressure transducer 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
17 EICA Electronic regulator 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Maintenance

21 A100 Condensate drain - complete 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

21S A160 Condensate drain - service unit 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
22 E100 Main switch 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
KF KF Solid state relay 1 1 1 1 1 1 1 1 1 1
Part 5

part is identified with its ID Number and related Spare Part Number.

exploded drawings Ref. with their description and quantity installed

Spare parts list is printed on a dedicated sticker applied on the
internal side of the rear panel of dryer. On this sticker each spare

Here below the cross reference table between ID Numbers and

 EN Technical Data
Pos. Type-No.: 1110A 1111A 1112A 1113A 1114A 1115A 1116A 1117A 1118A 1119A 1120A 1121A 1122A 1123A 1124A 1125A 1126A
Part 6

m3/h 20 35 50 65 85 105 125 150 180 225 300 360 450 550 650 750 850
1 Air flow rate
m3/min 0,33 0,58 0,83 1,08 1,42 1,75 2,08 2,50 3,00 3,75 5,00 6,00 7,50 9,17 10,83 12,50 14,17
2 Cooling air required m3/h 200 300 380 450 1900 2200 3300
50Hz kW 0,14 0,17 0,19 0,24 0,28 0,28 0,45 0,47 0,68 0,76 0,71 0,89 0,91 1,11 1,40 1,34 1,70
3 Power consumption (total)
60Hz kW 0,16 0,19 0,21 0,28 0,33 0,33 0,55 0,56 0,83 0,84 0,86 1,00 1,10 1,40 1,70 1,72 1,89
50Hz W 33 55 95 76 175 410
4 Power consumption (fan)
60Hz W 40 65 110 90 230 410
5 Power supply V / Hz 1 / 230V / 50-60Hz 1 / 230V / 50Hz or 1 / 230V / 60Hz
6 Allowable pressure (compressed air) min. …. max. bar 2 … 16 2 … 14
low pressure side bar 20,9
7 Allowable pressure (refrigerant)
high pressure side bar 30 39,2 30
8 Compressed air connections G 1/2" 1" 1.1/4" 1.1/2" 2"
9 Weight kg 26 27 29 31 32 33 34 55 56 57 68 74 116 120 121 155 165
height 645 870 1055
10 Dimensions width mm 360 480 645
depth 410 660 920
50Hz R134a R407C
Refrigerant type
60Hz R134a R407C
11
50Hz kg 0,17 0,17 0,19 0,20 0,22 0,21 0,24 0,36 0,37 0,41 0,55 0,62 1,00 1,15 1,20 1,65 2,10
Technical data

Refrigerant quantity
60Hz kg 0,17 0,17 0,19 0,20 0,22 0,21 0,27 0,40 0,40 0,43 0,66 0,66 1,15 1,15 1,00 1,70 1,85

EN_26
12 Sound pressure level (at distante of 1m) dB (A) < 70
13 Type of protection IP 22
14 Condensate drain hose mm D. 8 / 14
Specification:
Pos.1 : Air flow rate reffered to the suction status of the air compressor +20 °C 1 bar
at compressed air inlet temperature +35 °C
operating pressure
7 bar
ambient temperature
pressure dew point at CA-dryer outlet +25 °C
+3 °C

Pos.3,4 : Power consumption at ambient temperature +25 °C

Compressed air inlet temperature

max. +70 °C
Allowed ambient temperature
min. +2 °C
Technical modifications are subject to change without notice, error not excluded. max. +50 °C

Designation: Type-No.: Technical Data Sheet: Date: Page 1 of

Refrigerated Compressed Air Dryer 1110 A - 1126 A T1110000009I 09.06.2017 1

 Appendix legend Part 7

APX 1 1 Compressed air inlet 6 Electric connection

2 Compressed air outlet 7 Service access
3 Cooling air inlet 8 Fixing holes
4 Cooling air outlet E100 Operation switch
5 Condensate drain EICA Electronic regulator

APX 2 & W100 Heat exchanger complete EIC4 Fan sensor

APX 4 W10L Heat exchanger air/air EIC5 Fan transducer
W10K Heat exchanger refrigerant/air V710 Condensate drain service valve
B100 Condensate separator EICA Electronic regulator
W110 Heat exchanger insulation shell A100 Condensate drain – complete
PSLO Refrigerant low pressure-switch E100 Main switch
TSAH Safety thermo-switch 51 Front panel
PSAH Refrigerant high pres.-switch 52 Rear panel
V100 Refrigerant compressor 53 Right lateral panel
V400 Hot gas by-pass regulator 54 Left lateral panel
W200 Refrigerant condenser 55 Cover panel
M200 Fan (motor) 56 Base plate
M201 Fan blade 58 Support beam
M203 Fan grid 60 Control panel
F100 Filter drier 66 Cover control panel
X500 Capillary tube 81 Flow diagram sticker
EIC3 DewPoint sensor A160 Condensate drain – service unit
X100 Schrader valve

APX 3 S1 Main switch PSLO Refrigerant low pressure-switch

K Refrigerant compressor TSAH Safety thermo-switch
KT Compressor thermal protection PSAH Refrigerant high pres.-switch
KR Compressor starting relay A2 DDS Electronic regulator
CS Compressor starting capacitor EIC3 DewPoint sensor
CR Compressor run capacitor EIC4 Fan sensor
V Condenser fan EIC5 Fan transducer
KV Fan thermal protection B1 Condensate drainer
CV Fan starting capacitor

Type 1110A-1117A WD001_V04

Type 1118A-1119A WD002_V04
Type 1120A-1121A WD003_V04
Type 1122A-1124A WD006_V05
Type 1125A-1126A WD006_V04

EN_27
APX 1.1 1110 A – 1116 A

APX 1.2 1117 A – 1121 A

EN_28
APX 1.3 1122 A – 1124 A

APX 1.4 1125 A – 1126 A

EN_29
APX 2.1 1110 A – 1111 A

APX 2.2 1112 A – 1116 A

EN_30
APX 2.3 1117 A

APX 2.4 1118 A – 1119 A

EN_31
APX 2.5 1120 A – 1121 A

APX 2.6 1122 A – 1124 A

EN_32
APX 2.7 1125 A – 1126 A

EN_33
APX 3.1 1110 A – 1117 A

EN_34
APX 3.2 1118 A – 1119 A

EN_35
APX 3.3 1120 A – 1121 A

EN_36
APX 3.4 1122 A – 1124 A

EN_37
APX 3.5 1125 A – 1126 A

EN_38
EN_39
74MD0011A0-EN_01

DDS7