Shut-Down Procedure - Domnick Hunter PNEUDRI MiDAS Manual De Instrucciones

The dryer contains two desiccant chambers, while one chamber is drying the
compressed air (adsorption), the other chamber is simultaneously undergoing
regeneration (desorption). At a predetermined time both exhaust valves close and
repressurisation begins. Every three minutes the chambers are reversed in function,
this is the changeover point. Changeover is characterised by an immediate venting of
compressed air from the chamber entering regeneration.
The dryer can be shut down at any point in its cycle and when restarted will enter an
automatic repressurisation stage. After repressurisation the cycle will commence at
the point at which it stopped.
NB
If power is switched on, the dryer will enter an automatic repressurisation stage at the
point at which it stopped.

3.5 SHUT-DOWN PROCEDURE

To Depressurize the Dryer
Prior to isolating the electrical supply close the outlet valve (F) while simultaneously
opening the by-pass valve (G) if fitted. Close the inlet valve (E). The dryer will now be
isolated from mains pressure. Cycle the dryer for a minimum of 3 minutes to ensure
the dryer vents and is completely depressurized. When the dryer is completely
depressurized, isolate the electrical supply.
NB
The by-pass valve (G) should only be opened if the dryer is undergoing maintenance.
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