Safety Safety Regulations Read this service manual very carefully and observe all cautionary references before the initial start of this refrigerated dryer and before carrying out any maintenance on the unit. Explanation of Symbols and References This symbol is placed before all safety references where there is dan- ger to life and limb.
Signs and labels of reference may not be removed or rendered unreadable. Attention! Any alterations or reconstruction carried out without the prior written authorization of KAESER COMPRESSORS Inc. will invalidate the war- ranty. Refrigerant Initial startup of and maintenance work on the refrigerant circuit may only be carried out by persons who have been trained in the safety concepts of refrigeration engineering.
Rinse immediately with open eyelids and plenty of running water for at least 10 min- utes and seek medical advice if pain persists. Spare Parts The use of KAESER original parts guarantees safe and reliable operation of the refrigerated dryer. Environmental Protection...
Never direct compressed air toward persons. Compressed air is a con- centrated form of energy and as such is dangerous to life. Copyright KAESER COMPRESSORS, INC. All rights reserved. No part of this manual may be reproduced in any form without per- mission of KAESER COMPRESSORS, INC. 3 --- 7...
If the machine is to remain packed for a lengthy period, then the instructions in chapter “should be followed. By sea or air Special packing instructions can be obtained from KAESER Service. Temporary Storage Store the refrigerated dryer in an enclosed space, regardless of whether it is packaged or not.
Construction and Operation Construction and Operation Items referred to in ( ) correspond with the items in the Pipe and Instrument Flow Diagram (see chapter 5.6). Construction The main component of the refrigerated dryer comprises a combined heat exchanger (heat transmitter).
Construction and Operation Refrigerant Circulation The dryer is able to cool the compressed air by using a refrigeration system not unlike a typical home refrigerator. Cooling is achieved by transferring heat from the compressed air to the refrigerant by vaporizing (boiling) the refrigerant, thereby turning the refrigerant into a gas.
Construction and Operation 5.4.3 Operational Status Indicator The operational status of the condensate drain is indicated by a red LED (8) on the hous- ing of the ECO---DRAIN. The LED will indicate one of the following conditions: 1 LED on permanently: the drain is operational 2 LED extinguishes for a short period: the drain is discharging moisture...
Construction and Operation Component Identification Numbers in ( ) correspond to those in the Pipe and Instrument Flow Chart. (P & I Flow Chart). Compressed air outlet 10 Compressed air inlet Control cubicle 11 Safety pressure switch (9) Refrigerant liquefier (10) 12 Filter dryer (8) Heat exchanger 13 Refrigerant compressor (11)
32” 32” 8” Measurements shown are minimum recommendations A Cooling air inlet B Cooling air outlet Attention! Installing of inlet and/or exhaust air ducting without prior written ap- proval from of KAESER COMPRESSORS Inc. is not permitted. 6 --- 15...
Installation Compressed Air Connection Attention! Use flexible connecting pipes at the compressed air inlet and dis- charge to ensure vibration isolation, prevent strain on piping connec- tions and allow easy installation. To avoid damage, do not overtighten the compressed air connections. The refrigerated dryer is piped ready for operation.
Installation Condensate Drain Connection A hose connection is provided for drainage of the condensate. See chapter 1.5 for the di- mensions. Use larger cross---sections for condensate lines longer than 16ft. Attention! Take care when fitting the condensate drainage hose that the conden- sate separated by the refrigeration dryer can flow without hindrance.
The internal components of the refrigerated dryer are factory adjusted Attention! for correct operation. Adjustments may not be made to these compo- nents without prior written consultation with KAESER Compressors Inc. Points to be Observed before Switching On: NON -- OBSERVANCE OF THESE OR OTHER REFERENCES (WARNING;...
Initial Start Ready for Operation Attention! Do not start the refrigerated dryer until completing the following: The refrigerated dryer is installed according to the conditions stated in chapter 6. All electrical connections, air piping and condensate lines are correctly connected and properly tightened.
Operation Operation During operation of the refrigerated dryer, condensate is separated from the compressed air. The condensate must be drained and collected in a suitable container. It must be disposed of according to Federal and local environmental codes. Collect the accumulated condensate in a container and dispose of properly. Instrument Panel Main switch Indicator --- refrigerant compressor ON...
Operation Explanation of the colored segment scale of the pressure dew point indication: (suction pressure gauge) Blue -- white range (low suction pressure) results in too low a pressure dewpoint due --- Evaporator temperature too low (evaporator freeze---up) --- Dryer too large or very low air demand. Refer to chapter 1.4 Green range (normal suction pressure) results in a normal pressure dew point.
Operation If the control lamp (2) does not extinguish after approximately 15 min- utes then a fault is apparent (see chapter 8.4.3). Do not open the compressed air shut-- off devices (inlet/outlet) until Attention! the control lamp (2) is extinguished. Open the shut ---off valve of the compressed air inlet slowly (admission of the compressed air).
Refrigerated dryer iced up on the air Switch off the dryer until the air system side. has thawed. If the system ices up again after starting again, refer to authorized KAESER distributor. 8.4.3 Pressure dew point too high Possible fault: Remedy: Ambient temperature too high.
The safety pressure switch shuts down the refrigerated dryer Possible fault: Remedy: Ambient temperature too high. Check the technical data, see chapter 1.2. Condenser surface (refrigerant lique- See maintenance instructions fier) contaminated. chapter 9.2.2. Defective condenser fan motor. Refer to authorized KAESER distrib- utor. 8 --- 24...
Maintenance Maintenance Maintenance Instructions: Before starting work, follow the procedure below to ensure the unit is not started or energized while maintenance work is being performed: Work on the electrical equipment of the refrigerated dryer may only be carried out by a qualified electrician or trained personnel under the supervision of a qualified electrician according to local codes.
Maintenance 9.2.1 General checks Inspect the electrical components of the refrigerated dryer every two to three months. Correct any malfunctioning or worn components, such as loose connections or over- heated cable immediately! Escaping compressed air and/or refrigerant can cause injury to per- sonnel and lead to damage to the dryer.
¡ See chapter 9.2.5. Solenoid coil is defective. ¡ Contact authorized KAESER distributor. Screw on the left ---hand side panel. 9.2.5 Cleaning the ECO -- DRAIN Clean the condensate drain monthly, or more frequently depending on the degree of con- tamination of the compressed air.
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Maintenance 1 Cross ---head screws, M5 x 2.5 O Ring, 28 x 1.5 2 Diaphragm Thrust spring for valve piston 3 O Ring, 6 x 1.5 Valve piston 4 Diaphragm seat Housing 5 Thrust spring for diaphragm Top cover 6 Diaphragm cover Items in ( ) refer to items detailed in the previous figures.
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Maintenance Reassembly of the ECO -- DRAIN: It is recommended that parts subject to wear, such as the diaphragm, Attention! valve piston and O rings be replaced annually for reasons of safety and reliability. Check the diaphragm (2), the existence and correct seating of the O rings (3) and (7) on the diaphragm seat (4) and diaphragm cover (6).
Spare Parts and After Sales Service Spare Parts and After Sales Service Provide the following details for all queries and spare parts orders: (see also the name plate) Refrigerated dryer, model: ....... Serial number: .
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