Most of the United States has been experiencing a brutal heat wave. Why am I writing about this? Because broadcasters need to worry about operating temperature, the range in which devices must operate to function correctly.
Why does a piece of equipment need a proper temperature? Many of us remember from grade school that heat causes expansion while cold causes contraction. Leads and circuit board traces are subject to this, as are edge connectors and patch bays. As a result, computers and microprocessor devices all have strict operating temperatures.
Some devices also need air flow, usually to cool components or dissipate heat sinks. This is accomplished by fans blowing in a purposeful direction. Engineers know well that fans are efficient but can be undependable because moving parts can fail.
Also, fans can suck in many particulates in the air. You’ll see the evidence when you’re cleaning older equipment; the inside may be covered with black dust. Don’t try to clean that mess using compressed air; bring in a vacuum. Why blow the dust around when you can suck it up and dispose of it?
Some rack rooms are blessed with smart air conditioner design, with the equipment being fed chilled air on one side of the rack as heat is dispersed on the other.
For broadcasters air conditioning is crucial in maintaining operating temperature, not just seasonally but all year long. It’s important not only at the transmitter but in the studio and office as well.
When working with an acoustician or architect, ask about airflow, cooling and noise.
Also maintain a regular schedule of changing filters to minimize particulates. If your intake point is in a field, you’ll need to keep out the pollen. If your intake is on a street you’ll want to keep out automotive exhaust.
I remember working at a facility where the intake point was above a loading dock. What could go wrong?
Use the filters recommended by your HVAC vendor. Invest in regularly scheduled replacement; it will save you in emergency repairs later.
Another important task is to clean your condenser coils regularly, washing them once or twice a year. A garden hose works well. Clean coils make your system efficient.
Operating temperature is also important for humans. Take care of your staff and consider their comfort. While your management may question you closely about the need to air condition equipment, they’ll be more understanding about the need to provide a comfortable working environment.
The aspect of noise is another important consideration. Airflow causes noise, which is why acoustical ductwork exists. Be aware of the fans in your equipment. Explore noiseless fans available from electrical supply houses. Many manufacturers do offer fanless options; I recently ordered fanless network switches.
Air conditioning is a crucial factor in the design of a facility. Don’t ignore it. If your AC fails, your other equipment may follow quickly, most likely at the worst time.
