Service Needs - Bosch DOMESTIC HOT WATER HEAT PUMP Technical Manual

7.5 Service Needs

Using pressure manometers and thermometer
The normal measuring equipment is a service pressure gauge and preferably some type of thermometer. Data is
collected using fixed gauges and connecting service gauge to the available connections to the service in the
system.
Portable instruments as refrigerant analysers are also available and give already all data needed with possibility of
printing the report.
Pict.61 – Digital refrigeration analyser (example from Testo)
Nevertheless, service pressure gauges should be calibrated regularly and be of good quality. The data obtained
from the service will have some accuracy and will depend greatly on the "human factor". They should therefore be
used with caution and compared with design data of the system to find and analyse discrepancies.
A thermometer with a sensor attached with heat transfer paste and insulation must be used to ensure accuracy in
the temperature readings. If possible fixed thermometers are preferable.
Sensor assembled with
thermal paste
Insulation
Al-tape
Pict.62 – Example of fixation of contact thermometer
6720649497 SM HP270-1 2012/09 en
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