Installation; Checklist - Domnick Hunter PNEUDRI DX102 Manuel D'installation, De Mise En Service Et D'entretien

4. INSTALLATION

A) Checklist
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Ensure the Desiccant Air Dryer is correctly sized for the inlet pressure, taking into consideration pressure drops
caused by valves, pipes, filters etc. Allowance should be made for purge air loss. The dryer should be typically
sized at 1 bar g (14 psi g) below nominal compressor output pressure.
✔
Ensure the Desiccant Air Dryer is correctly sized for inlet temperature and to meet the dewpoint specified
e.g. -40˚C or -70˚C pdp.
✔
A receiver must be fitted before the Desiccant Air Dryer to ensure optimum performance. (Establish the volume
flowrate of compressed air required and calculate variation in air demand to establish the size of air receiver
required).
✔
The pipe should predominantly remain at compressor discharge size. On multibank installations, ensure that
dryers are located in an end fed manifold arrangement.
INLET LAYOUT
Dryer Dryer Dryer
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Ensure the Desiccant Air Dryer is securely mounted on a suitably structured, flat and level floor or base which is
free from vibration. It should be secured to the base using bolts located through the slots in the mounting feet.
✔
Ensure that there is sufficient space around the equipment for safety and maintenance, including space for lifting
tackle and loading.
✔
Ensure minimum distance between dryer bank centres is 500mm.
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Check rating plate for correct supply voltage/frequency.
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Electrical isolators should be provided in a safe and accessible place and rated correctly for the power required.
Miniature Circuit Breakers (MCB's) MUST be used.
✔
The installation should be properly ventilated to allow easy dissipation of generated heat.
✔
Ensure that the correct quality, size and type of filtration equipment is fitted e.g. AO and AA grades before the
dryer and AR Grade after the dryer.
✔
All noise considerations should be taken into account when choosing a site for the Desiccant Air Dryer.
✔
Ensure that water removed by the dryer is allowed for. If exhaust is to be piped away, ensure adequate pipe
sizes are used, e.g. min 100mm (4") (see Figure 6).
✔
Separate drainage should be fitted to each filter condensate drain and piped away. Ensure that any effluent is
disposed of properly, to conform with legal requirements, e.g. CS Oil/Water Separator.
OUTLET LAYOUT
Dryer Dryer Dryer
Connection
21
Flexible
Inlet