Tait TB7300 Installation And Operation Manual

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Tait TB7300 Installation And Operation Manual Manual pdf 40 page image

40 Installation TB7300 Installation and Operation Manual© Tait Limited November 20175.1.3 Equipment VentilationAlways ensure there is adequate ventilation around the base station (referto “Cabinet and Rack Ventilation” on page 40).Notice Do not operate equipment in a sealed cabinet. The ambienttemperature must stay within the specified range. We recommendstrongly that you ensure the cooling airflow is not restricted.Notice The cooling fans are mounted behind the front panel. Toensure adequate airflow through the base station, do not operate it formore than a few minutes with the fans disconnected (such as when thebase station is being serviced).5.1.4 Ambient Temperature SensorThe ambient temperature reading for the base station is provided by thetemperature sensor located inside the chassis.5.1.5 Cabinet and Rack VentilationThe cooling airflow for the subrack enters through the front panel and exitsat the rear. For optimum thermal performance, the heated air that passesthrough a base station must never be allowed to re-enter the air-intakes onthe front panel. Any space at the front of the cabinet not occupied byequipment should be covered by a blanking panel. See Figure 5.1 onpage 41.Equipment installation should observe the following guidelines:■ The recommended maximum number of subracks in a 38U cabinet isfive, as illustrated in Figure 5.1 on page 41.■ Any space at the front of the cabinet not occupied by equipment shouldbe covered by a blanking panel. Refer to Figure 5.1 on page 41.■ Subrack placement in the cabinet should include a 2U gap at the top ofthe cabinet.■ To allow enough cooling airflow through a cabinet-mounted basestation, the cabinet should allow for 50 cu.ft/min for each subrack(0.024 cu.m/s).■ To ensure adequate ventilation, the cabinet should have a vent at the topwith an area of approximately 23in² (150cm²) per subrack, or a similararea of ventilation at the rear of the cabinet behind each subrack.■ The maximum ambient temperature at the base station front panels mustnot exceed +140°F (+60°C).