Maintenance - Marstair A2LSYSTEMATCH SMC 15 Technical Manual

3H MAINTENANCE
3H1 General
The refrigerant recovery section of the risk assessment template or equivalent should be carried out before
commencing refrigerant recovery.
Before engaging in any maintenance or repairs ensure
o
Use of trained certified natural persons*.
o
Well ventilated working environment.
o
Use of a flammable gas leak detector.
o
Correct selection of tools and equipment compatible with A2L refrigerants.
o
Recovery of remaining refrigerant.
o
Purging pipework with a suitable inert gas, prior to, during and for a suitable period after carrying
out flame brazing to ensure that a flammable mixture cannot be formed.
o
Adequate fire watch.
o
Pressure testing of repair in accordance with EN378.
o
Evacuation and dehydration in accordance with EN 378.
o
Charging of the system in accordance with EN 378.
o
Leak checking of the repair and system in accordance with EN 1516/2017.
Any other information identified within the site specific risk assessment is available and taking into account.
*NOTE: it is the responsibility of the operator to ensure the technician is certified to the correct
standard (EN13313 or equivalent).
Regular inspection and periodic maintenance is enough to ensure long time usage.
• Make sure all electric connections are tightened.
• Make sure all fan screws are tightened.
• Make sure each fan is running freely.
• Make sure heat exchanger mounting is level and stable.
• Make sure all of the defrost heaters are working properly.
• Because of the high humidity of the ambient air high icing formation may be seen during the first start-up. For this
reason check icing formation if it occurs.
• Observe ice formation and examine defrost cycle.
• Make sure that the system is evacuated well from air. There should not be air pockets inside of the coil.
• Cables should not be affected by heat of resistance.
• Check the defrost process. Defrost time can be extended if it is not enough to melt all of the ice.
• Do not touch of coil heater without gloves. Be wary of any material splashing and wear protective goggles.
• Make sure drainage water easily flows away. Please see water flows away easily with opening drain pan and
side cover.
• Check safety labels are clear
System is to be switched off and isolated during any repairs.
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