Tech Tips

Tech Tips is another great way that Ferguson HVAC Air Cold Supply brings you more information without leaving your place of business. We have expert staff eager to share articles about the equipment you use. Read about solutions, best practices and user guides for all of your major equipment needs.

October 12, 2018

Caution: Scroll Compressors

  Caution! Scroll compressors (as with any refrigerant compressor) should never be used to evacuate a refrigeration, air conditioning, or heat pump system.  The scroll compressor can be used to pump down refrigerant in a unit as long as the pressures remain within the operating envelope. On a 410a compressor, do not allow pressure to go below […]

October 12, 2018

IS PRIMARY VOLTAGE SET CORRECTLY ON THE TRANSFORMER?

Many 24v control voltage issues on BOTH commercial and residential systems are caused by not correctly setting up the transformer. Problems can be immediate or may surface may years later. Symptoms may include: low control voltage (24v), unit won’t do anything, contactor not pulling in, not being able to program thermostat, and erratic cooling, heating, […]

October 12, 2018

THREE PHASE SYSTEM AND COMPRESSOR START-UP

On startup, it should be required to have gauges connected.  This is the only way you will know if the compressor is running correctly.  If the compressor is running backwards, the suction pressure will not drop, and discharge pressure will not rise to normal levels.  If compressor is running in backwards, remove power and reverse […]

October 12, 2018

IS PRIMARY VOLTAGE SET CORRECTLY ON THE TRANSFORMER?

Many 24v control voltage issues on BOTH commercial and residential systems are caused by not correctly setting up the transformer. Problems can be immediate or may surface may years later. Symptoms may include: low control voltage (24v), unit won’t do anything, contactor not pulling in, not being able to program thermostat, and erratic cooling, heating, […]

October 12, 2018

IS PRIMARY VOLTAGE SET CORRECTLY ON THE TRANSFORMER?

Many 24v control voltage issues on BOTH commercial and residential systems are caused by not correctly setting up the transformer. Problems can be immediate or may surface may years later. Symptoms may include: low control voltage (24v), unit won’t do anything, contactor not pulling in, not being able to program thermostat, and erratic cooling, heating, […]