I.1 Mounting of passive chilled beams
Passive beam shall be mounted under a ceiling.
I.2 Pressure testing and correction for water cooling capacity
One air pressure (static chamber pressure or total pressure loss of the unit) has to be provided in the documentation/software by the Applicant/Participant for the capacity to be rated.
The test shall be performed for nominal primary airflow rate. The measured pressure drop Δp shall be within ± 10% of claimed value. If Δp may be adjusted, the manufacturer is allowed to do it.
In all cases, the capacity shall be corrected, following the formula:
Pc = Pressure corrected water cooling capacity
Pm = Measured water cooling capacity
Δpn = Chamber pressure or total pressure loss given in manufacturer's documentation
Δpm = Pressure recorded during the measurement from the product's measurement connection or static pressure measured using 4 static taps connected by piezometric ring.
Formula used on the nominal airflow rate, and the same correction factor is used for 80% and 120%. In the reports, the laboratory shall give the claimed, the measured values and corrected output of the formula.
The corrected value Pc shall be compared with the claimed value.