Quincy QHD750 Instruction Book page 85

Instruction book
Emptying (To be done in Maintenance Mode only)
1. Let the dryer program run to the pressure equalization step.
2. Stop the dryer when the pressure is equalized in both towers.
3. Shut off the power supply.
4. Isolate the dryer from the air net by closing the air inlet and outlet valves. Depressurize the towers.
5. Install a suitable collector underneath the plug for emptying.
6. Remove the plugs or flanges and let the desiccant pour out into the collector. A vacuum cleaner may
be used to speed up the process and control dust.
Filling
1. Once the vessels are empty, refit the plugs or flanges.
2. Fit a large funnel to the filling hole of one of the drying towers; the size of the narrow part should be
35-40mm/1.4-1.6 in.
3. Gently pour the correct amount of desiccant (see section Dryer data) into the tower. Use a vacuum
cleaner to control dust escaping from the filling hole.
4. Repeat steps 2 and 3 for the other tower; the amounts of desiccant must be equal in both towers.
5. Do not use any mechanical or pneumatic means for filling; this may destroy the desiccant.
6. Refit the filling plugs or flanges (1). The dryer is now ready to be started (see section Starting for
starting instructions).
Desiccant
See section Technical Data for desiccant quantities.
9829 2151 14
 When replacing desiccant, make sure that the desiccant is disposed of
according to the local regulations.
 When replacing the desiccant, never use an ejector or similar equipment as
this might shatter the beads. The beads must be gravity-fed into the tower.
 After replacing the drying medium, the amount of dust released can increase.
Therefore, it is recommended to replace the dust filter downstream of the dryer
one week after replacing the desiccant.
85