Dehydration Filter Repositioning - Trane CGCN Installation Operation & Maintenance

Dehydration filter repositioning

It is recommended to reposition of filter cartridges Dryer in the case of high pressure drop across the filter same
or in case with the value of the subcooling within the limits of acceptability, occurs the passage of bubbles
through the sight glass.
It is recommended to reposition of the cartridges when the pressure drop across the filter reaches 50 kPa with the
compressor at full load. The cartridges must also be replaced when the humidity indicator inside the sight glass
changes color and highlight excessive humidity, or the periodic oil analysis indicates the presence of acidity (TAN
excessive)
Repositioning Procedure ARNIN
Ensure proper water flow through the evaporator throughout the intervention period. The interruption of the flow
water during this procedure would result in the freezing of the evaporator resulting in rupture of the
its internal pipes.
1. Switch off the compressor by turning the corresponding switch in the Off
2. Wait until the compressor has stopped and close the valve located on the liquid line
3. Start the compressor by turning the corresponding switch to On
4. Verify on the display of the microprocessor, the evaporation pressure corresponding.
5. When the vapor pressure reaches 100 kPa rotate the switch again to switch off the compressor.
6. Once the compressor is stopped by putting a label on the switch for starting the compressor maintenance to
prevent unwanted ignitions.
7. Close the suction valve of the compressor (if any)
8. With a recovery unit to remove the remaining refrigerant from the filter of the liquid, until the atmospheric
pressure. The refrigerant must be stored in a suitable container and clean.
ARN
WARNING! To protect the environment, do not release the refrigerant into the atmosphere removed. Always use
a device recovery and storage.
9. Balance the internal pressure with the outside by pressing the vacuum valve installed on the filter cover.
10. Remove the cover from the filter drier.
11. Remove the filter elements.
12. Install the new filter elements within the filter.
13. Replace the cover gasket. Do not oil the filter gasket with mineral oil to non- contamination in the circuit. Use
for this purpose only compatible oil (POE)
14. Close the filter cover
15. Connect the vacuum pump to the filter and evacuate up to 230 Pa.
16. Close the valve on the vacuum pump.
17. Recharge the refrigerant recovered in the filter during its emptying.
18. Open the valve on the liquid line
19. Open the suction valve (if any)
20. Start the compressor by turning the switch.