Quincy QHD750, Instruction Book

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Instruction book
9829 2151 14 9
17. Safety valves (if equipped) are sized for fire contingencies only. If the maximum pressure of the
compressor is higher than the maximum allowed working pressure of the dryer a full flow safety valve
must be installed between the compressor and the dryer in order to avoid overpressure on the dryer.
The set pressure of the full flow safety valve must be equal or lower than the maximum allowed
working pressure of the dryer.
Also consult following safety precautions: Safety precautions during operation
and Safety precautions during maintenance .
These precautions apply to machinery processing or consuming air or inert gas.
Processing of any other gas requires additional safety precautions typical to the
application which are not included herein.
Some precautions are general and cover several machine types and equipment;
hence some statements may not apply to your machine.
1.4 Safety precautions during operation
All responsibility for any damage or injury resulting from neglecting these
precautions, or non-observance of the normal caution and care required for
installation, operation, maintenance and repair, even if not expressly stated, will
be disclaimed by the manufacturer.
Precautions during operation
1. Never touch any piping or components of the dryer during operation.
2. Use only the correct type and size of hose end fittings and connections. When blowing through a hose
or air line, ensure that the open end is held securely. A free end will whip and may cause injury. Make
sure that a hose is fully depressurized before disconnecting it.
3. Persons switching on remotely controlled machines shall take adequate precautions to ensure that
there is no one checking or working on the machine. To this end, a suitable notice shall be affixed to
the remote start equipment.
4. Never operate the machine below or in excess of its limit ratings.
5. People staying in environments or rooms where the sound pressure level reaches or exceeds 90 dB
(A) shall wear ear protectors.
6. Periodically check that:

All guards are in place and securely fastened

All hoses and/or pipes inside the machine are in good condition, secure and not
rubbing

There are no leaks

All fasteners are tight

All electrical leads are secure and in good order

Safety valves and other pressure-relief devices are not obstructed by dirt or paint

Air outlet valve and air net, i.e. pipes, couplings, manifolds, valves, hoses, etc. are in
good repair, free of wear or abuse.
7. Never operate the machine when there is a risk of taking inflammable or toxic fumes, vapours or
particles.
8. Do not remove any of, or tamper with, the sound-damping material.
9. Never remove or tamper with the safety devices, guards or insulations fitted on the machine. Every
pressure vessel or auxiliary installed outside the machine to contain air above atmospheric pressure
shall be protected by a pressure-relieving device or devices as required.