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6. MAINTENANCE
A) Maintenance Precautions
Maintain and keep a written record of all maintenance and repair work carried out on the dryer and its' auxiliary
equipment.
The frequency and nature of the work required over a period can reveal adverse operating conditions which
should be corrected.
Ensure that all instructions concerning operating and maintenance are strictly followed, and that the complete
unit, with all accessories and safety devices is kept in good working order.
Maintenance, overhaul and repair work must only be carried out by either domnick hunter or a domnick
hunter authorised distributor.
Before dismantling any part of the dryer ensure that all heavy movable parts are secured.
B) Routine Maintenance
At regular intervals check the following:
(Ensure that all necessary safety precautions are undertaken when working with pressurised components).
1.
Dryer and system for leaks.
2.
Open kaddis drains on lower manifold, inlet and exhaust valve assemblies, to remove any entrained moisture.
3.
Moisture indicators.
4.
'Power On' light is illuminated on Heat Regenerative DH Models only.
5.
Differential pressure indicators and kaddis drains on filters.
6.
Exhaust silencer (should be changed when differential pressure exceeds 500 m bar (7 psi) or annually,
whichever is earliest).
7.
Inlet and outlet filtration (should be changed when differential pressure exceeds 350 m bar (5 psi) or annually,
whichever is earliest).
8.
Use only GENUINE domnick hunter spare parts.
C) Maintenance Examination
The user of the equipment may be subject to the requirements of the PRESSURE SYSTEMS REGULATIONS
(1989). These regulations require regular maintenance, examination and the keeping of records of all
examination, tests and any repairs undertaken.
The domnick hunter DX and DH range of Desiccant Air Dryers are regarded under Regulation 2, not as a
pressure vessel, but as a pressure containing component, such as equipment that is not fabricated or welded
(e.g. filters, pressure regulators, refrigerant dryers).
The period of inspection under the regulations is to be decided by the owner of the equipment, but domnick
hunter would recommend that the dryers aluminium componentry is internally inspected for corrosion within a
six year period, or whenever the desiccant material is changed.
D) Maintenance Plans
domnick hunter offers a comprehensive range of service plans tailored to suit your requirements to ensure the
optimum operating performance of your dryer is maintained at all times.
For further details, please contact our Service Manager.
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