A pressure reading without its operating context
A technician is reviewing a previous service sheet before adding a small appliance to an existing fuel system. The sheet contains a clearly written inlet-pressure number and a note that the appliance fired successfully. It does not identify whether the measurement was taken with the appliance operating, whether other connected loads were firing, or which test point and instrument were used. The proposed addition will increase demand on a common section. The customer believes the old number proves the supply is adequate and asks the technician to proceed immediately. The current appliance instructions and the installation drawings are available, but no new measurements or sizing review have yet been completed.
1. What can be concluded from the old number?
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It is evidence of an unspecified earlier condition, not proof of supply performance under the new connected demand. Confirm the reference, measurement point and required operating conditions, then obtain the relevant measurements and sizing evidence before accepting the addition.
2. What should the new record document?
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Record the equipment identity, test point, instrument, units, pressure reference, connected operating loads and applicable conditions. Include the result, comparison with requirements and any unresolved restriction, so another qualified worker can interpret what was actually verified.