26
Maintenance Security Precautions
Check whether the maintenance area or the room area meets the requirement on the name
plate. It’s only allowed to be operated in the rooms that meet the requirements on the name
plate.
Check whether the maintenance area is well-ventilated. The continuous ventilation status
should be kept during the operation process.
Check whether there is a fire source or potential fire source in the maintenance area. The naked
flame is prohibited in the maintenance area. The no-smoking sign should be hanged.
Check whether the appliance mark is in good condition. Replace the vague or damaged war-
ning mark.
Storing the unit
1. Do not puncture or light the unit.
2. The unit shall be stored in a room without continuous fire source (e.g. naked fire, litten gas
appliance, operating electric heater).
3. The unit shall be stored in a ventilated place; the ventilation device shall operate normally,
and ventilation port shall be without obstacle.
4. Check the unit periodically to see if there is collision mark and if the appearance is good.
5. Check the electronic components (e.g. cable) periodically to see if there is breakage.
6. Do not collapse the unit to avoid leakage of refrigerant; if leakage is found, please arrange
ventilation immediately and ask professionals for maintenance, to avoid a fire hazard.
Disposing and recycling of the unit - Must be done by a qualified technician
Disposal:
The technician shall be familiar with the device and all its characteristics before disposal. Proceed-
ing to safe recycling of refrigerant is recommended. If the recycled refrigerant shall be utilized,
please analyze the sample of refrigerant and oil before proceeding. Please ensure the required
power supply before testing. Please take the following operation:
1. Be familiar with the device and its operation.
2. Cut off power supply.
3. Make sure the following items are respected before proceeding:
- Mechanical operation device shall be convenient for the operation of refrigerant tank;
- All personal protection apparatuses shall be workable, and they are used correctly;
- The whole recycle procedure shall be done under the instruction of qualified person;
- The recycled device and refrigerant tank shall comply with relevant standards.
4. Please arrange vacuum pumping to the refrigeration system. If vacuum status cannot be
reached, please arrange vacuum pumping from several positions to recycle the refrigerant in
different parts of the system.
5. Make sure the capacity of refrigerant tank is sufficient before recycling.
6. Start and operate the recycled device according to the operation instruction of manufacturer.
7. Make sure the refrigerant tank is not too full (the filled liquid shall not exceed 80% of the capa-
city of refrigerant tank).
8. Do not exceed the maximum operation pressure.
9. Remove the refrigerant tank and device quickly after finishing operation and make sure all
cut-off valves in the device are closed.
10. The recycled refrigerant cannot be filled into another refrigeration system before purification
and inspection.
