Pneumatech PH 230 HE - Page 55

If the dryer is stopped for a longer period, keep the external inlet and outlet valve
closed to avoid moisture from entering the dryer.
Under no circumstances must compressed air be allowed to flow through the dryer
when the electrical power is switched off (regeneration of the desiccant material will no
longer be possible).
Instruction book
2920 1891 00 53