HUGFEN C31-2 - Manual (Page 5)

General Safety Instructions
IMPORTANT: THE FOLLOWING SAFETY PRECAUTIONS MUST BE READ AND UNDERSTOOD BEFORE
REPAIR OR MAINTENANCE WORK IS ATTEMPTED.
General
 Beware of the following danger areas within the dryer :
a) Any rotating components (fan etc.)
b) Sharp edges (coil fins, etc.)
c) Hot refrigeration pipework
d) Possible live electrical components or terminals
 The refrigeration and compressed air circuits can operate at high pressures and unauthorised tampering
may cause injury or damage.
 Discharge from the condensate drain will contain oil, and therefore should be disposed of safely.
 Do not place either temporary or permanent loads on or against the unit.
Mechanical
 The dryer shall be fully disconnected or isolated from the compressed air supply and any remaining pressure
released safely.
 The refrigeration circuit shall be fully emptied of gas safely BEFORE work is attempted on any associated
components. Refrigerant gas may be toxic and/or harmful (burns - both hot and cold), therefore use the
necessary protective equipment (such as goggles and gloves) at all times when emptying the system,
 If any heat or flame is to be used on or near the unit care shall be taken to avoid contact with combustible
surfaces. Furthermore, it should be noted that the insulation materials and refrigerant might give off toxic
fumes when heated. Whenever heat or flame is used the working area shall be thoroughly ventilated
BEFORE and DURING this operation. Proper fire precautions shall be observed and the necessary fire
safety equipment on hand, typical for electrical, oil and foam fires,
 The refrigerant used is refrigerant R134a or R407C. No other type of refrigerant or mixture shall be used.
 If recharging or adding refrigerant to the unit ensure correct refrigerant and oil are used, check labels on
compressor identifying refrigerant being used.
 Ester oils used in systems with R134a & R407C are very hygroscopic (adsorb moisture very quickly),
therefore care should be taken to ensure that the systems and any ester oil containers are not left open to
atmosphere for any length of time.
 If any oil is removed from the system it shall be disposed of safely. Do not re-use or use for any other
purpose.
 When working on the dryers beware of any rotating components and any hot refrigerant pipework.
 Observe any safety labels fitted to various parts of the dryer.
Electrical
 The dryers are designed to operate only on a 220/240 volt, 1 phase, 50-60 Hz live neutral and earth supply.
THE EARTH CONNECTION MUST NEVER BE OMITTED. The voltage tolerance for each model is shown
on the respective wiring diagram in this Manual.
 The dryer must be fully isolated from the supply BEFORE maintenance work is started.
 The dryer MUST NOT be used on other supplies without prior approval from the manufacturer.
 The dryer should only be used in a SAFE (i.e. non- hazardous) area.
 Observe any electrical safety labels fitted to various parts of the dryer.
 Solenoid coils should not be removed from valve stem until they have been electrically disconnected.