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inserted into the sleeve. 

● The compressor does not work.

 

● Ambient temperature is too high, or ventilation is too low 

- ensure adequate 

ventilation. 

● The inlet air is too h

ot. Establish normal operating conditions. 

● The inlet pressure is too low. Establish normal operating conditions.

 

● The flow of inlet air is higher than the flow of the dryer 

- reduce flow - establish 

normal operating conditions. 

● The condenser is dirty 

- clean it. 

● The condenser fan does not work.

 

● Condensate has not been drained from the dryer.

 

● The hot gas bypass valve is not properly set up 

- contact an engineer in the field 

of refrigeration. 

● Leakage has occurred in the cooling circuit 

- contact a specialist in the field of 

refrigeration. 

The dewpoint is too 
low  

● Fan always on 

- PV pressure switch is defective - replace it. 

● Ambient temperature is too low 

- establish nominal operating conditions. 

● The hot gas bypass valve is not properly set 

up - contact an engineer in the field 

of refrigeration. 

Excessive pressure 
drop in the dryer 

● Condensate has not been drained from the dryer.

 

● Dew point is too low 

- the condensate is frozen and blocks the air flow. 

● Check the dampening of the pipe con

nections. 

.....................................................................................................

 

 

The condensate was 
not drained from 
the dryer  

● Check the electrical installation.

 

● Dew point is too low 

- the condensate is frozen and blocks the air flow. 

● The compressed air pressure is too low and the condensate is not removed 

establish normal operating conditions. 

● The electronic condensate drain is not working properly.

 

The dryer 
continuously drains  
the condensate 

● The electro

nic condensate separator is dirty. 

There's water in the 
pipeline.  

● The dryer does not start.

 

● 

If it is installed 

- Unprepared air flows through the bypass conduit - close the 

bypass conduit. 

● The dryer does not discharge condensate.

 

● Dew point is too

 high. 

High compressor 
outlet temperature 

● Check which of the following caused the activation: 

 

1. Overload heat - set normal operating conditions. 
2. The temperature of the input air is too high - establish normal operating 
conditions. 
3. The ambient temperature is too high, or the ventilation of the room is too low 
- ensure adequate ventilation. 
4. The condenser is dirty. 
5. The fan does not work. 
6. The hot gas bypass valve is not properly set up - contact the engineer in the 
field of refrigeration. 
7. Coolant is leaking - consult with an engineer in the field of refrigeration. 
- Reset the thermal switch by pressing the button on the thermal switch itself - 
check the proper operation of the dryer. 
- TS thermal switch is defective - replace it. 

 

Summary of Contents for RDHP 20

Page 1: ...before installation or use The proper and safe operation of the refrigeration air dryer is ensured only by following the recommendations and conditions stated in the instructions For additional questi...

Page 2: ...maintenance is limited to a few checks and cleanings as shown in the continuation of this manual These instructions must always be present at the unit and be available for the entire operating life o...

Page 3: ...15 5 4 3 RDC 2 MODBUS COMMUNICATION 17 5 5 EXPANSION VALVES 18 5 6 TIMED CONDENSATE DRAIN 18 5 7 SAFETY FUNCTIONS 19 5 7 1 LOW PRESSURE SWITCH 19 5 7 1 SAFETY FUNCTIONS OF RDC 2 19 5 8 FILTER DEHYDRA...

Page 4: ...rmation Please fill in the fields carefully Correct data enables proper and efficient maintenance of the device selection of suitable spare parts and technical support 1 2 Information on the supplier...

Page 5: ...yers 1 4 Refrigeration air dryers Refrigeration air dryers are the best choice in all standard applications where pressure dew point 3 C suffices Examples of such applications are process air in the p...

Page 6: ...t the dryer is vented and not under pressure this also includes the closest components of the installation in front and behind the dryer and that the dryer is not connected to an electrical source Do...

Page 7: ...eck and follow the local regulations for lifting and transporting heavy objects In the event of fire do not use extinguishing water on the dryer and nearby objects Wear suitable protective equipment e...

Page 8: ...1 Components 1 Heat exchanger 3in1 7 Switch 2 Condenser 8 Capillary tube 3 Compressor 9 Sensor for fan operation 4 Timed condensate drain 10 Filter dehydrator 5 Controller 6 Hot gas bypass valve Figur...

Page 9: ...1 230 50 0 170 0 135 350 0 21 R134a 0 23 352 x 485 x 499 24 RDHP 50 50 G 3 8 BSP F 0 3 1 230 50 0 170 0 135 350 0 30 R134a 0 34 352 x 485 x 499 25 RDHP 75 75 G 3 8 BSP F 0 3 1 230 50 230 60 0 40 0 25...

Page 10: ...INAL FLOW CAPACITY x COP x CAT x CIN x CDP OPERATING PRESSURE DEW POINT bar 15 20 25 30 35 40 45 C 3 5 7 10 psi 218 290 363 435 508 580 652 F 37 4 41 44 6 50 COP 0 57 0 7 0 8 0 88 0 94 1 1 05 CDP 1 1...

Page 11: ...wer temperature than the input air Refrigeration circuit The refrigerant enters the compressor and then enters the condenser at high pressure where it transfers heat to the ambient air and condenses T...

Page 12: ...e compressor cools condenses and changes the aggregate state from the gaseous to the liquid The condenser is a pipe in which the refrigerant is flowing and on which fins are placed The heat transfer i...

Page 13: ...ear on the display The alarm automatically turns off when the dryer is restarted and is operating properly a Sensors used for regulation 1 Tdew Dew point temperature 2 Tcomp Compressor temperature 3 T...

Page 14: ...FF ON via In Remote by changing the parameter 13 Remote control from 0 to 1 When the circuit is connected the controller goes to OFF state when the circuit is disconnected the controller is in ON stat...

Page 15: ...lue 5 5 Min Compressor OFF time yes Increase value Decrease value 1 min 6 no Increase value Decrease value 2 7 no Increase value Decrease value 5 8 no Increase value Decrease value 0 9 no Increase val...

Page 16: ...er number 5 You will see the default parameter value 1 min Change it to a desired value if necessary if not skip the next step Wait a couple of seconds the controller exits automatically Turn off the...

Page 17: ...022 T_Dew R_ONLY T_Dew X 200 10 C 40023 T_Comp R_ONLY T_Comp X 200 10 C 40024 T_Cond R_ONLY T_Cond X 200 10 C 40025 P_Cond R_ONLY P_Cond X 10 Bar 40026 Digital Input status R_ONLY 0 contact open 1 con...

Page 18: ...justed without the load on the dryer Rotate the screw until the following value is reached Hot gas setting R134 a pressure 2 0 barg 0 1 bar 5 6 Timed condensate drain Condensate drain consists of two...

Page 19: ...eck the hot gas bypass valve Lt Low dew point temperature Check that the temperature sensor is correctly inserted into its position check the cooling system sealing charging check the hot gas bypass v...

Page 20: ...o the interior components of the dryer the installation and use may result in injury or death Check the dryer for any visible damage after removing the packaging If the refrigeration air dryer is dama...

Page 21: ...vibration refers to the floor and pipes For maintenance and servicing provide sufficient space for uninhibited work around the unit 1 m The ventilation grilles of the device must not be covered for th...

Page 22: ...ressure vessel 3 Condensate Separator 8 Filter 4 Pre filter min 5 micron 9 Condensate drain 5 Bypass air valve Type A installation is recommended when the compressor operates at a reduced interruption...

Page 23: ...osition of the holes in the illustration is shown maximum size M8 The pipe connections for the compressed air in the front and back of the dryer must be fitted with suitable valves that allow the inde...

Page 24: ...bypass air circuit is closed and that the dryer is insulated from the system Check and ensure that the condenser is clean free of impurities 10 2 Start up Connect the dryer to the power supply Connect...

Page 25: ...nance work on the refrigeration air dryer turn it off and wait for at least 30 minutes for it to cool down Some components can reach high temperature during operation Avoid contact with these componen...

Page 26: ...s The condensate was not drained from the dryer Check the electrical installation Dew point is too low the condensate is frozen and blocks the air flow The compressed air pressure is too low and the c...

Page 27: ...1 1 1 1 1 Fan blade 2101865 1 1 1 1 1 Fan diffuser 2101863 1 1 1 1 1 Hot gas by pass valve 2204737 1 1 1 1 1 1 1 1 2204746 1 1 2204736 1 1 2204748 1 1 Filter 2101578 1 1 1 1 2100441 1 1 2100597 1 1 21...

Page 28: ...r property resulting from improper use or inadequate maintenance of the device and is limited solely to production errors When claiming a warranty you must provide information from the identification...

Page 29: ...29 16 Maintenance notebooks MAINTENANCE TYPE DATE SIGNATURE NOTES First installation...

Page 30: ...30...

Page 31: ...31 17 Drawings of RDHP refrigeration air dryers RDHP 20 100...

Page 32: ...32 RDHP 140 235...

Page 33: ...33 RDHP 300 480...

Page 34: ...34 RDHP 600 950...

Page 35: ...35 18 Electro schemes of RDHP refrigeration air dryer RDHP 20 180...

Page 36: ...36 RDHP 235 950...

Page 37: ...Compressed air refrigeration dryer Is in conformity with the following directives Pressure Equipment Directive PED 2014 68 EU Electromagnetic Compatibility Directive EMC 2004 108 EC EN 61000 6 3 2007...

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