DM390NF Refrigerated Compressed Air Dryer
Product Information: Compressed Air Refrigeration Dryer
The Compressed Air Refrigeration Dryer is a device that removes
moisture from compressed air by cooling it down to a temperature
where water vapor condenses and can be removed. The model number of
this particular dryer is DM390NF, and it is intended for use in
industrial settings where compressed air is used.
Safety Warning Signs
There are two safety warning signs that users of the Compressed
Air Refrigeration Dryer should be aware of. The first warns of the
risk of mechanical injury, such as extrusion, collision, impact,
shearing, entanglement, twisting, throwing, cutting, cutting,
puncturing, etc., caused by mechanical equipment movement
(stationary), parts, tools, and processed parts directly contacting
the human body. The second warning sign prohibits inverting,
shaking, quivering, and heavy breakage during transportation, sling
and installation.
Installation Instructions
When installing the Compressed Air Refrigeration Dryer, it
should be placed on a balanced and fast floor that does not have
heavy shock, slant, bumpiness, or bad drainage. It should also be
installed in a breezy place, and the ambient temperature cannot
exceed 45°C. It is prohibited to place the dryer in the open air
where there is humid, dust, and erode gas existence. Additionally,
when multiple dryers are placed together, their radiators cannot be
opposite.
Controller and Parts Name
The Compressed Air Refrigeration Dryer comes equipped with a
control operation panel that includes an electrical fault
indicator, start button, and stop button. Other parts include
compressed air outlet, compressed air inlet, filter aftercooler,
high voltage circuit breaker, cooling fan, cold coal evaporator,
water separator, condenser fan, cold coal compressor, distribution
box, automatic drainage, and high and low voltage control
switch.
Product Usage Instructions
Before using the Compressed Air Refrigeration Dryer, ensure that
it is installed correctly. Then, press the ON button to start and
the OPERATION indicator will light up. Depending on the ambient
temperature, the fan and motor inside will run and stop
reduplicative. If the evaporating pressure gauge exceeds 7kg under
the continuous running of the fan, it may be overload. To stop the
dryer, press the OFF button. The auto-drain/electric drain will
drain out after a period of time. When the orange button lights up,
there are some faults with the dryer.
When using the Compressed Air Refrigeration Dryer, use a linker
to connect AIR INLET and AIR OUTLET. Make sure you have configured
a bypass pipeline to maintain it. The weight of the pipeline
shouldn’t be too much, and caution should be taken not to overexert
when installing the pipeline. Before installing, thoroughly clean
the inner pipe to avoid dust. Do not pass the shaking of the
compressor to the dryer.
It is essential to operate the dryer strictly according to the
ambient temperature and working conditions stipulated in the
manual. Timely maintenance is also necessary to extend the dryer’s
lifespan. Professional people should be appointed to manage it.
Instructions for installation and operation Compressed air refrigeration dryer
MODELS: DM390NF
21.10. 20
Refrigerated Compressed Air Dryer
Contents
PREFACE…………………………………………………………1 SAFETY WARNING SIGNS…………………………………1 WARNING……………………………………………………….3 NOTICE OF INSTALLATION………………………………3 AN INTRODUCTION TO THE CONTROLLER………4 PARTS NAME…………………………………………………..5 METHODS OF OPERATION……………………………….6 ABOUT PRESSURE GAUGE………………………………..6 ABOUT POWER SUPPLY……………………………………6 MAINTENANCE TO THE DRYER………………………..7 MAIN TECHNICAL DATA OF THE DRYER…………..7 NOTICE…………………………………………………………..10 TROUBLESHOOTING………………………………………..10 APPENDIX……………………………………………………….13 SUMMARY……………………………………………………….13
REFRIGERATED COMPRESSED AIR DRYER
Preface
We’d like to give our thanks hereof for your choosing our Refrigerated Compressed Air Dryer as well as your trust and support. We sincerely hope it will make a great contribution to your production. Please read this instruction manual before operation. In this way to ensure that you are able to control the machine, which will run steadily and safety. This manual is to introduce installation, operating, running, maintenance, wiring chart and troubleshooting etc. Please pay attention to the technical data and comprehend the parts’function of the flow as well as their operation condition to the whole system before operating. This purpose is to let the user master the general knowledge during the dryer’s running and maintenance to ensure its running smoothly. Please feel free to contact us if there’s any question.
Safety warning signs
Danger! Supply voltage! Contact with non-insulated parts carrying supply voltage involves the risk of an electric shock resulting in injuries and death. Only qualified and skilled personnel are authorised to run electrically-operated devices. Prior to undertaking maintenance measures at the device, the following requirements must be met: Make sure that the power supply is switched off and that the device is off and marked for maintenance measures. Please also ensure that the power supply cannot be re-established during the works.
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Caution! Hot surfaces! During operation, several components can reach surface temperatures of more than 140°F. There is the risk of burns. All components concerned are installed inside of the closed housing. The housing must only be opened by certified skilled personnel 3 .
Beware of mechanical injury Caution! Avoid mechanical injury accidents! Extrusion, collision, impact, shearing, entanglement, twisting, throwing, cutting, cutting, puncturing, etc. Caused by mechanical equipment movement (stationary), parts, tools, and processed parts directly contacting the human body.
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REFRIGERATED COMPRESSED AIR DRYER
Warning
It’s prohibit to invert, shake, quiver and heavy break during transportation, sling and installation.
Please operate the dryer strictly according to the ambient temperature and working conditions stipulated in this manual.
Please maintain it timely. It will short the dryer’s life due to the exceeding of working conditions for a long time.
Check and make maintenance timely will extend it’s using life, please appoint professional people to manage it.
Notice of installation
Install on the balanced, fastness floor. It’s prohibited to place on the floor with heavy shock, slant, bumpiness and badness of drainage.
19.7 in
19.7 in
Air convection The ambient temperature is below 113°F
19.7 in
Install in the breezy place, and the ambient temperature can’t extend 450C.
It’s also prohibited to place in the open air, humid, dust and erode gas existence.
The radiators can’t be opposite when there’re many dryers placed together.
Compressedairoutlet Compressedairinlet Bypassvalve Intakevalve Interface Outletvalve
Controloperationpanel
Wheninuse, thebypassvalveisusuallyclosed, andtheinletandoutletvalvesof theairdryerareopened.
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Please use the linker to connect AIR INLET and AIR OUTLET. Please make sure you’ve configured by-pass pipeline in order to maintain. The weight of pipeline shouldn’t be too much, and caution that you can’t
overexert when install the pipeline. Please whiff and clean the inner pipe thoroughly before installing it so as to
avoid dust. Please also be noticed that the shaking of compressor can’t be passed to the dryer.
An introduction to the controller
POWER SUPPLY —- The power indicator, RED, it’s lighting during electrifying OPERATION —-The operation indicator, GREEN, it’s lighting if the dryer run smoothly. HIGH FAULT —-The high pressure fault indicator, ORANGE, it’s lighting when high pressure exceeds, the dryer will stop automatically when it lights, and the light will extinguish when it comes to balance with the low pressure. LOW FAULT —- The low pressure fault indicator, ORANGE, it’s lighting when low pressure exceeds, the dryer will stop automatically when it lights, and the light will extinguish when it comes to balance with the high pressure.
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REFRIGERATED COMPRESSED AIR DRYER
ELEC FAULT —- The electrical fault indicator, ORANGE, it’s lighting when the electric system has a fault, the dryer will stop automatically when it lights. ON —- Start button, GREEN, the start interval should at least last for 3 minutes. OFF —- Stop button, RED.
Parts name
Compressedairoutlet Compressedairinlet Filter Aftercooler Highvoltagecircuitbreaker Coolingfan Operationcontrolpanel Coldcoalevaporator Waterseparator Condenserfan Coldcoalcompressor Distributionbox Automaticdrainage Highandlowvoltage controlswitch
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Methods of operation
Check and make sure the dryer is installed correctly, you can go on preliminary operation, pressure the “ON” button to start.
The “OPERATION” indicator will light and according to the ambient temperature, the fan and motor inside will run and stop reduplicative. If the evaporating pressure gauge exceeds 7kg under the continuous running of the fan, it may be overload.
Press the “OFF” button to stop. The auto-drain/electric drain will drain out after a period of time. When the orange button lights, there’re some faults of the dryer,
it will stop automatically. Please restart after the clearance faults.
About pressure gauge
Evaporating pressure gauge, evaporating temperature shows the pressure of low-pressure refrigerant. The index should between 4~6kg of normal load. And it’ll be a bit lower if non-loaded.
Air pressure gauge, shows the compressed air pressure of the surrounding air outlet.
About power supply
Please use 220V or 380V special interface. Please be sure you’ve installed the leakage protector. You’re required to make the earth wire before connecting the power supply.
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REFRIGERATED COMPRESSED AIR DRYER
Dedicated line 220V-380V Set up leakage terminal circuit breaker
Ground wire
Maintenance to the dryer
1. Unload the auto-drain to clean monthly, but it’s not necessary if it’s electric drain.Open the by-pass valve; close the inlet & outlet valve before unloading the drain to lessen the pressure inside auto-drain to zero. Unscrew the lower shell with pipe pliers; infuse some neutral abluent to clean it. It absolutely prohibited by using menstruum. After that, please re-install to the home position, locking with the O-ring. Close the by-pass valve than open the inlet valve.
2. Clean the radiator-grid weekly with aspirator, brush or air gun etc. 3. You can use the air gun only to clean the electric switch box and
circuit board.
Main technical data of the dryer
1. Air-cooling refrigerated air dryer Inlet temperature: Normal temp.:113°F High temp.:176°F Cooling method: Air cooling Ambient temperature: 100°F Dew point: 35.6-50 Refrigerant: R22 Inlet pressure: 0.6~1.0Mpa Pressure drop: 0.02Mpa
2. Water-cooling refrigerated air dryer Inlet temperature: Normal temp.:113°F High temp.:176°F Cooling method: water cooling Dew point: 35.6-50 Refrigerant: R22 Inlet pressure: 0.6~1.0Mpa Pressure drop: 0.02Mpa Cooling water inlet temperature: 89.6°F Cooling water inlet pressure: 0.2~1.4Mpa
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DM390NF series refrigerated air dryer
Product Information Brand Model
Technical Details Demargo DM390NF
Max air volume Pressure dew point
230CFM 35.6-50
Working pressure
87Psi
The largest Working pressure Inlet temperature:
145Psi < 113
Ambient temperature:
100
Working hours way to control
Continuously working Microcomputer control
Pressure loss
2.9Psi
Drain valve Cooling method
Electronic drain valve Air-cooled
Refrigerant model Power supply
Compressor power
R134a 220V1ph 60HZ
1KW/1.34HP
Fan Power
0.25HP
Air pipe connection
Threaded interface
Air inlet and outlet pipe size 1.5internalthreadDN40
Dimensions (L × W × H)
38.6”-19.6”-35.2”
Installation method
Simple and convenient
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REFRIGERATED COMPRESSED AIR DRYER
11 10
8 9
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7 6 5
4
1
3
2
1 Compressor 2 Pressure controller
(single)
3 Pressure controller (double)
4 Capacitance
5 Controller 6 Cold coal low
pressure meter
7 Cold coal high pressure meter
8 Dry filter
9 Refrigeration hand valve
10 Fan
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Heat exchanger assembly
12 Electronic drain
13 Condenser 9
Notice
1. Note: If the evaporating pressure gauge exceeds 7KG during working, it may be over-loaded, please check the over-loaded conditions as bellows.
2.Loading conditions: It will go to over loaded under the following conditions and run constrainedly. Then it will stop running when the protector “orange” indicators light. 1). Compressed air temperature is excessive. 2). Compressed air capacity is exceeded. 3). Ambient temperature is higher than 113. 4). Voltage under 198V (220V rated) or under 340V (380V rated). 5). Badness of thermolysis.
3.Attention: The auto-drain may not act as there’s some impurity contained in the compressed air, please check if there’s condensate water coming out from the draining hole everyday. According to the characteristic and structure of drain, it may drain out from the draining hole provide the pressure is under 1.5kg/cm2. Therefore, the pressure may not be raised if gas production of air compressor is too small. Please pay attention to it.
Troubleshooting
Familiar faults caused by the refrigerated air dryer itself and external factors conditions as well as its trouble-shooting as follows:
Pressure drop is excessive
phenomena
The differential pressure is too large of the whole air compression
station
Shortage of the air using Ice over of the evaporator
Causation The piping valves don ‘t be fully opened.
The pipe(s) is too slim. Pipeline is too long, lots of elbow and
tie-in. Much leakage of the piping
connections.
Block of the piping filters.
Actual using capacity exceeds the compressor rated capacity. Fall physically Fault of temperature switch .
Invalidation of expansion valve .
Troubleshooting Open the valve fully. Enlarge the pipe(s).
Re-configurate the piping system.
Check the elbows and connections.
Clean the filters or change new one(s).
Change larger compresso r, or increase pressure.
Decrease air flowrate. Renew temperature switch.
Renew expansion valve .
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Badness of draining
phenomena
Liquid water content
Abnormity of the evaporating gauge.
REFRIGERATED COMPRESSED AIR DRYER
Causation The air by-pass valve doesn’t be fully
closed. Compressed air doesn’t go through the
dryer. The flowrate is too much.
Badness of the drain. The drainpipe is higher than the auto –
drain. Compressor is too large, while the dryer
is too small. Evaporating temperature is too high. The ambient air pollution or badness of
ventilation. Block of the expansion valve .
Leakage of refrigerant.
Spoiling of the gauge.
Troubleshooting
Close the by-pass valve.
Open the inlet and outlet valves of dryer.
Re-design the compressor system. Clean or change.
Re-setting the drainpipe.
Re-setup the compressor and dryer.
Check the air load of compressor. Improve the ventilation and ambient
conditions. Change the expansion valve. Check the leakage, and infuse
some refrigerant. Change the gauge.
Out of operation
phenomena Out of power supply.
Power supply is in normal, but it can’t start.
All switches in normal, but it can’t start.
Evaporating temperature indicator too lower.
Evaporating temperature indicator too higher.
Causation
The fuse blew out or trip of the fuse disconnecting switch.
Power-off. Abnormity of voltage or too slim of the
power cord. (voltage drop) Badness of switch. badness of contactor
Badness of overload relay. Badness of electric capacity.
Badness of start relay. Badness of pressure switches. Badness of temperature switches. Badness of refrigerated compressor. Trips of high-low pressure and desn’t go
to restoration. Electromagnetic switch doesn’t go to
restoration. High pressure switch doesn’t go to
restoration. Setting error of the temperature switches.
Badness of refrigerated compressor. Evaporating temperature (badness of low
pressure gauge). Block of the expansion valve. Setting lower of the temperature and
pressure switches.
Leakage of refrigerant.
Ambient temperature is too high.
Invalidity of the thermal by-pass valve. Block of the condenser. The capacity is too much.
Abrasion of the valve flap of refrigerant compressor.
Troubleshooting Check if the power lack of phase or
short circuit. Check the fuse. Check and maintain. Please choose voltage according to the rated on the name plate.
Change. Change. Change. Change capacitor. Change. Change. Change. Change. Check the reason of trips, press “RESET”.
Check and pressure “RESET”.
Check and pressure “RESET”.
Reset or change. Change.
Change.
Change.
Please adjust the setting.
Check the leakage points, and infuse some refrigerant.
Improve the ambient temperature or change place for ventilation. Adjust or change. Clean. Reposition of the matching.
Change.
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Badness of drainage system
phenomena
Causation
The using pressure is under1.5kg/cm 2.
Badness of drainage.
Spoiling of ball valve. Slant or disrepair of the valve.
Pressure is too high.
Block of the filtering of drain. Block of the waterspout.
Troubleshooting Normal pressure should be 2 ~10
kg/cm2. Change. Improve, fasten or change. Please use according to the rated pressure. Clean. Clean.
Badness after starting
phenomena
Causation
Abnormity of voltage.
After starting, it’s short circuit.
Thought the high pressure trip is restoration, it ‘s can’t
start.
Badness of pressure switch. Badness of fan.
Trip of the overload protector. Begrime of the condenser. Excessive of refrigerant.
The ambient temperature is too high.
Trip of the carrying relay.
Block or closed of expansi on valve. Block of refrigerant filter. Badness of start relay. Badness of capacitor.
Badness of pressure switch. Refrigerated compressor is overload ed.
The ambient temperature is too high.
The relay rated electric current is too low. Badness of relay connection. Lack phase of power supply. Badness of connector.
Troubleshooting Reposition of the control circuitry
and switches. Change. Change.
Check the reasons. Clean it thoroughly. Less some refrigerant. Improve the ambient temperature
and ventilation. Change. Change. Change.
Change capacitor. Change.
Decrease air capacity. Improve the ambient temperature
and ventilation. Adjust the rate. Clean or renew. Check the reasons. Clean or renew.
REFRIGERATED COMPRESSED AIR DRYER
Appendix:
Guarantee card Thank you for choosing Demargo refrigerated compressed air dryer. The dryer is manufactured by holding abundant experience and mature technology, it’s the advanced product. We ensure one year guarantee from your buying date. We will answer your questions timely and carefully.
File card in duplicate
Customer name: Contact person: Telephone No.: Fax No.: Address: Buying date: Model No.: Serial No.: Installation place:
Customer name: Contact person: Telephone No.: Fax No.: Address: Buying date: Model No.: Serial No.: Installation place:
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