volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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Pressure gauges may be used to carry out the following checking and measuring work: > < Refrigerant gas loop with butterfly (throttle) and collection tank

Polo Mk4

Checking and measuring work with a pressure gauge
Checking and measuring work with a pressure gauge
   
Readout on the pressure gauge:
1 - Temperature scale for R134a refrigerant gas, CF3-CH2F or CH2F-CF3.
2 - Pressure scale
Pressure gauges may have one or more temperature scales, as well as the pressure scale. The values on the R134a scale are ordered according to the vapor pressure table. Considering that each refrigerant gas shows different vapor pressures at the same temperature, there is a temperature scale for each refrigerant gas.
  v87-1470

Pressure gauges may be used to carry out the following checking and measuring work: > < Refrigerant gas loop with butterfly (throttle) and collection tank