Dantherm DAC20-450D, Service Manual

Page 1: ...C20 450D DAC20 450D Dantherm Air Handling Suzhou Co Ltd Address No 855 Zhu Jiang Rd SND Shi Shan Industrial Belt Suzhou Jiangsu China Phone 86 512 66678500 Fax 86 512 66678501 Homepage www dantherm ai...

Page 2: ...Revision History Revision Description Date Author A First design Reed Wu 2010 06 01 01 Release Reed Wu 2010 10 08 Tom Sun 2010 12 22...

Page 3: ...N OF THE UNIT 6 4 DESCRIPTION OF FUNCTIONALITY 7 GENERAL DESCRIPTION 7 TEMPERATURE 8 SET POINTS 9 COMPRESSOR OPERATION 9 HIGH TEMPERATURE ALARM 10 CONDENSER FAN OPERATION 10 INTERNAL FAN OPERATION 10...

Page 4: ...eventive maintenance Usage of the product The DAC20 450D is especially designed for cooling of electronic equipment and for outdoor installation The unit must not be used for other purposes under any...

Page 5: ...equipment part 2 2 specification of environmental tests transportation ETS 300 019 1 1 Equipment engineering environmental conditions and environment tests for telecommunications equipment part 1 1 c...

Page 6: ...cted with foam Then per Thirty units are carried in a wooden package PE Contents in the package The DAC20 450D air conditioner is delivered with an installation kit with the following content DAC20 45...

Page 7: ...be with clip lock at the bottom of the body and stick the sponge strip on inside flanges Lift the unit up and place it in the wall of cabinet mount the brackets and flanges with M6 bolts nuts fixing u...

Page 8: ...he main power cable from power supply Make sure that the power supply is powered off Demount all screws on the flanges Take off the air conditioner 3 Identification of the Unit All units have a silver...

Page 9: ...r to the refrigerant and exhaust to the ambient air through the condenser coil The closed loop internal circuit protects the enclosed equipment all types of hostile environments and control the intern...

Page 10: ...o cool down the electronic equip ment Return air temperature is the temperature of the air entering the air conditioner from the electronic equipment Ambient air temperature is the outside air tempera...

Page 11: ...If the return air drops to the set point 3 C compressor stop 3 C Compressor operation Failure indications 1 If the current to the compressor is missing the compressor running again after 30 second if...

Page 12: ...The condenser fan is stopped until cooling is needed When the compressor starts the main board can feel condenser temperature when condenser temperature above 35 C condenser fan will also start 35 Int...

Page 13: ...350 Pressure Operation Pa Operating pressure 101 3 70 106 Disp Pa Estimated pressure drop internal 80 Drop Pa Pressure drop in climate unit int 80 Temperature Tcooling C Cooling set points 25 20 40 t...

Page 14: ...Tools Like a car the units need to be maintained with at regular interval to prevent an overheated situation causing the BTS to shut down Also lack of maintenance could cause unnecessary pollution to...

Page 15: ...isit is Step Action 1 Make sure that the power to the unit is safely switched off 2 Clean the unit carefully for dust especially at Air ducts Fans Condenser and evaporator coils 3 Perform a test simul...

Page 16: ...e corrosion and show no obvious signs of leakage Are the coil lamellas clean and undamaged Are all fan blades free of obstructions cracks missing blades and in balance Do the fans rotate freely and ar...

Page 17: ...running smoothly so only replace if the component is faulty DAC20 450D Before the demounting the old spare part it is very important to order the new spare part from Dantherm To do this most effectiv...

Page 18: ...Screwdriver T20 Step1 Step2 Step3 Remove the Cover screws Remove the connecter Remove 4 screw and take off internal fan Step Action 1 Remove internal cover install screw see step1 1 2 Remove the conn...

Page 19: ...Action 1 Remove screws fixing the inside cover same as replacing the internal fan 2 Unplug the connector and remove four screws on external fan cover plate 4 3 Replace the external fan Replacing the...

Page 20: ...rtified cooling technician should carry out the evacuation by using the necessary evacuation and recycling equipment If the refrigerant gas is not to be recycled by the evacuator it must be passed on...

Page 21: ...ould be left to the local scrap dealer PCB Metal parts The metal parts are uncritical to scrap and can be left to local scrap dealer A few parts might have a thin visible layer of PVC foam insulation...

Page 22: ...20 Wiring diagram...