18
D3
heatless desiccant air dryer
4.4 service ‘C’ instructions - pilot valves
replacing pilot valves - (Every 4 years or 24,000 hours)
1.
Ensure the dryer is shut down and fully depressurised (See page 8, section 4.1)
2.
Disconnect and note configuration of the tubing, cables and variation between the pilot valves
(Normally Open and/or Normally Closed)
3.
Remove the 4 screws to release the pilot valve assembly
4.
Remove the elbows and joints
5.
Refit the elbows and joints with thread sealing material to the new pilot valve if required
6.
Refit the pilot valve assembly and tubing
7.
Start up the Dryer (page 8)
