Condensing Unit Maintenance - Marstair A2LSYSTEMATCH SMC 15 Technical Manual

2L CONDENSING UNIT MAINTENANCE
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).
IMPORTANT
ISOLATE THE UNIT PRIOR TO COMMENCING ANY MAINTENANCE OR REPAIR WORK
GENERAL
1. Ensure unit is not blocked or enclosed and there is adequate free airflow in and round the condensing unit.
2. Visually inspect the unit for wear and tear.
3. Remove the access panels (retain the screws).
4. Clean the base and insides of the unit.
5. Check all electrical connections are secure.
6. Check the face of the coil for cleanliness. Comb the fins if necessary.
7. Check the tightness of the compressor fixing bolts.
8. Check the fan rotates freely.
9. Check the pipework insulation condition.
10. Suction and discharge pressure.
11. Operation of head pressure control.
12. Visually check for oil patches.
13. Check safety labels are clear
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