Information On Maintenance - Immergas MAGIS M4-30 Use And Installation

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INFORMATION ON MAINTENANCE.

1) Checks in the area.
Before starting work on systems containing flammable refrigerants, safety checks must be performed to guarantee that the
risk of flammability is reduced to a minimum. Before performing repairs on chilling systems, follow the precautions below.
2) Work procedure.
The jobs must be carried out according to a consolidated safety procedure to reduce the risk of refrigerant or flammable
vapour leaks during work to a minimum.
3) Work area.
All maintenance personnel and anyone else working in the involved area must be informed as to the nature of the work
carried out. Avoid working in confined spaces. The area in the immediate vicinity of the work field must be appropriately
delimited. Make sure that there are safety conditions within the area to prevent the risk of refrigerant leaks.
4) Refrigerant leak check.
The area must be checked with an adequate refrigerant detector before and during the jobs, to guarantee that the technician
is aware of the presence of potentially flammable atmospheres. Make sure that the leak detector is suitable to be used with
flammable refrigerants, namely without electric discharges, appropriately sealed or inherently safe.
5) Presence of a fire extinguisher.
If hot work needs to be done on the chilling system or on related parts, adequate firefighting devices must be available.
Check that there is a dry fire extinguisher or a CO
6) No source of ignition.
No one carrying out work in relation to a chilling system that entails exposure of pipes that contain or have contained
flammable refrigerant must use sources of ignition implicating the risk of fire or explosion. All possible sources of ignition,
including cigarette embers, must be kept sufficiently far from the place of installation, repair, removal and disposal, during
which the flammable refrigerant could be released into the surrounding area. Before starting the work, the area around
the appliance must be monitored to make sure there are no flammability hazards or ignition risks. "NO SMOKING" signs
must be applied.
7) Ventilated area.
Make sure that the area is outdoors or appropriately ventilated before entering it or performing hot work. A certain venti-
lation level must also be guaranteed while carrying out the work. Ventilation must safely release the dispersed refrigerant
and preferably eject it into the outside atmosphere.
8) Checks on the chilling equipment.
When replacing electric components, these must be suitable for the purpose for which they are used and comply with the
correct specifications. The manufacturer's guidelines for maintenance and service must be complied with that all times.
Should any doubts arise, contact the Authorised Immergas Technical Service for assistance. The following controls must
be applied to systems that make use of flammable refrigerants:
• The recharging amount depends on the size of the room where the appliances containing the refrigerant are installed;
• Ventilation devices must run regularly and the ejection routes must not be obstructed;
• Illegible markings or writings must be corrected.
• Chilling lines or refrigeration components must be installed in a position where they are unlikely to be exposed to any
substance that can corrode components containing refrigerants, unless the components themselves are made of materials
inherently resistant to corrosion or have been adequately protected against corrosion.
9) Checks on electrical devices.
Repair and maintenance operations on electric components must include preventive safety checks and inspection proce-
dures of the components. If a fault occurs that could jeopardise safety, the circuit must not be powered until the issue has
been resolved in a satisfactory way. If it is not possible to immediately eliminate the fault, but the system needs to keep
running, a temporary solution must be found. This must be communicated to the owner of the equipment so that all par-
ties are informed thereof.
The initial safety checks include making sure:
• That the capacitors are discharged: this is essential to avoid the possibility of electrical discharges;
• That there are no live components or cables during charging, recovery or purging of the circuit;
• That a compliant earthing system is in place.
fire extinguisher adjacent to the recharge area.
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