AQUATECH RAPID/X6 - Maintenance and Repair Safety; Trained Personnel and Procedures

6
MAINTENANCE AND REPAIR WORK TO ONLY BE UNDERTAKEN BY
TRAINED AND QUALIFIED PERSONNEL.
• 
the risk of ignition is minimised.
• 
being present while the work is being performed.
• All maintenance staff and others working in the local area shall be instructed on the nature of work being carried

• The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the techni-

is suitable for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
• -

area.
• No person carrying out work in relation to a refrigerating system which involves exposing any pipe work shall use

• 
installation, repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding
space.
• -
ble hazards or ignition risks. “No Smoking” signs shall be displayed.
• Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting
any hot work.
• A degree of ventilation shall continue during the period that the work is carried out.
• The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmo-
sphere.
• 
• At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt, consult the manu-
facture’s technical department for assistance.
• Repair and maintenance to electrical components shall include initial safety checks and component inspection
procedures.
• If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is
satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an
adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are
advised.
• Initial safety checks shall include: that no live electrical components and wiring are exposed while charging, recov-
ering or purging the system; that there is continuity of earth bonding.
• During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being
worked upon prior to any removal of sealed covers, etc.
• If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operat-
ing form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.
• Particular attention shall be paid to the following to ensure that by working on electrical components, the casing
is not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive

etc.
• Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purpose of

• 
• Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed
the permissible voltage and current permitted for the equipment in use.
• 
atmosphere. The test apparatus shall be at the correct rating.
• -
erant in the atmosphere from a leak.
• Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other
adverse environmental effects.
• The check shall also take into account the effects of aging or continual vibration from sources such as compres-
sors or fans.
• Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant

• 
sensitivity may not be adequate, or may need recalibration.
• Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection
equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant em-

• 
shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work.
• 
• If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system,
or isolated (by means of shut off valves) in a part of the system remote from the leak.