DH PNEUDRI DX Instrucciones Para La Instalacion, El Funcionamiento Y El Mantenimiento página 31

C) By—Pass Procedure
1. Gradually open the by-pass valve 'C' to allow the air to by-pass the dryer.
2. Gradually close 'SHUT OFF' valves 'A' and 'B' fully.
3. Wait until the dryer has depressurised, indicated by the pressure gauges.
4. A small amount of pressure* may remain in the outlet chamber.
5. Turn the external electrical isolator to the 'OFF' position.
* This pressure must be released by slackening the outlet connection prior to undertaking maintenance work on the
dryer.
Valve B
Valve A
29
Valve C