63
Measure
Completed
Notes
aS
Leak detection
The following leak detection processes are suitable for systems
with flammable refrigerants:
Leak detection with electronic refrigerant detectors:
■
Electronic refrigerant detectors may not have the required sensi-
tivity or may need to be calibrated to the relevant range. Carry
out the calibration in refrigerant-free surroundings.
■
The refrigerant detector must be suitable for the R290 refriger-
ant to be detected.
■
The refrigerant detector must not contain any potential sources
of ignition.
■
Calibrate the refrigerant detector to the refrigerant used. Set the
response threshold to < 3 g/a, suitable for propane.
Leak detection with liquid leak detectors:
■
Liquid leak detectors are suitable for use with most refrigerants.
!
Please note
Liquid leak detectors containing chlorine may react with
the refrigerant. This could result in corrosion.
Do not use liquid leak detectors that contain chlorine.
Measures to take if a leak in the refrigerant circuit occurs:
■
Immediately extinguish all open flames in the vicinity of the heat
pump.
■
If brazing/soldering work needs to be undertaken to remedy the
leak, always extract all the refrigerant from the refrigerant circuit.
Purge the site to be brazed/soldered before and during the braz-
ing/soldering work with oxygen-free nitrogen.
aD
Extracting the refrigerant
Carry out the work in accordance with chapter "Extracting the re-
frigerant": See page 76.
aF
Topping up the refrigerant
Carry out the work in accordance with chapter "Topping up the re-
frigerant": See page 78.
aG
Decommissioning
Carry out the work in accordance with chapter "Final decommis-
sioning and disposal": See page 96.
aH
Identification
(labelling the heat pump)
If the heat pump has been taken out of use, affix a label to the
heat pump in a clearly visible position containing the following in-
formation with date and signature:
■
Refrigerant is flammable.
■
The system has been taken out of use.
■
The refrigerant has been removed.
aJ
Recovering the refrigerant and compressor oil
■
Recovering the refrigerant:
See chapter "Extracting the refrigerant" on page 96.
■
Recovering the compressor oil:
See chapter "Disposing of the compressor and compressor oil"
on page 96.
Maintenance
Checklist for maintenance work
(cont.)
5800 917 GB
Maintenance
