Operation; Start-Up Procedure; Shutdown Procedure - DH PNEUDRI DX Instrucciones Para La Instalacion, El Funcionamiento Y El Mantenimiento

5. OPERATION

A) Start up Procedure
1. Turn external electrical isolator to 'ON' position.
2. Ensure 'SHUT OFF' valves 'A and B' are closed.
3. Ensure that inlet manifold is drained of any condensate (1).
4. Introduce air by gradually opening 'SHUT OFF' valve 'A' to the fully open position.
5. When the dryer is fully pressurised, indicated by one of the column pressure gauges registering a similar pressure
to the inlet pressure, the cam timer will initiate its cycle.
6. Open 'SHUT OFF' valve 'B'.
7. Indication of the operating condition is provided by pressure gauges which denote drying and purging in the
relevant columns.
8. The operating cycle will commence on either column 'A' or 'B' and will remain at line pressure, whilst the opposite
column depressurises. This indicates that the dryer is now operational.
9. Towards the end of each drying cycle, both column gauges will show equal pressure, indicating repressurisation
has taken place before changeover.
10. Operation is now continuous until shutdown procedure is initiated.
B) Shutdown Procedure
1. Gradually close valve 'B' then 'A' fully.
2. Wait until the dryer has depressurised, indicated by the pressure gauges.
3. A small amount of pressure* may remain in the outlet chamber.
4. 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.
TYPICAL MULTI BANK INSTALLATION START UP & SHUT DOWN PROCEDURES
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Valve B
Valve A