A low refrigerant charge could make it go into delay mode after running for a time. It could be a number of things and depending on how the system is controlled and what controls are installed in the system will depend on the problem. With no air blowing across the coil you will freeze the coil turning your AC into an ice maker. The time delay is not recommended in the fashion you suggest. Less air moving across the evaporator coil equals less heat hitting the coil allowing it to operate well below the dew point, therefore, removing more moisture from the air.Īlso, it depends on the system but there are no guarantees it can be derated or derated efficiently by changing the metering device.
With the condenser running the slower fan speed allows more moisture to be removed with the colder coil. However, that is only achieved with an ECM blower with accompanying controls as noted previously. This occurs for approximately 5 to 10 minutes and then it ramps up to 100%. That translates to more comfort and efficiency. High-efficiency systems run the fan at 50% speed or less on start-up to increase the dehumidification process. Therefore, you will not have to do anything with the fan. This can likely be rectified by changing the metering device but you need someone who really knows what they are doing and can replace the metering device to derate it to 2-tons. Yes, oversizing will cause humidity problems. That is difficult to do without a variable speed ECM blower and the correct solid-state controls. Running the fan at a slower speed will create more dehumidification. Ask your HVAC contractor to make sure you are protected against this problem.Īir Conditioner Service and Repair - another great article to help you from High Performance HVACĭelay Timers and the Air Conditioner Condenser If you have an older mechanical thermostat it’s a good idea to make sure you have a delay timer in your condenser. Delay Timers and the Air Conditioner Condenser - Digital Thermostats Most modern digital and programmable thermostats have delay timers built into them.
Courrier compressor 3.5 ton serial number#
You may want to have the model number, serial number (for both the condenser and air handler), and type of thermostat you have. They should be more than happy to answer your question…………and if they are not sure ……check to see if the condensing unit is equipped with a delay timer. Ask them if your condensing unit is equipped with a delay timer. Ask to speak with the HVAC service manager or HVAC technician that has worked on your HVAC equipment. It is often in the homeowner’s best interest to replace the condensing unit.īefore this happens to you, call the company you often deal with to maintain and repair your HVAC system(s). If this doesn’t unlock the compressor then you will have to replace the compressor or the air conditioning or heat pump condensing unit. A hard start kit and a good rap with a hammer can sometimes do the trick. If the compressor is locked up there is a chance that it can be unlocked (note the word chance). The run or start capacitor for your compressor can be replaced for a minimal cost compared to replacing a compressor.
If the homeowner is lucky, the only thing wrong is the capacitor or fuse. HVAC Condensing Units and Compressor Mechanics – Delay Timers and the Air Conditioner Condenser Often the compressor inside the condenser is locked up, the run capacitor is shot, a fuse is blown, a breaker is tripped, the compressor is damaged mechanically or electrically beyond repair or a combination of any of these things mentioned.
I have responded to calls where the air conditioner or heat pump condensing unit was not equipped with a delay timer and the air conditioning or heat pump condensing unit was inadvertently started before the pressures were allowed to become static. The HVAC air conditioner condensing unit compressor should not be started unless the air conditioning or heat pump system is at static pressure. That is not good for the compressor and could possibly damage it. If your HVAC system is not equipped with a delay timer and you turn the system on within five minutes of turning it off, the compressor inside the condenser must start against that higher pressure.
The high side pressure on a hot day can be as high as 300 P.S.I. The equalized pressure is often referred to as static pressure to HVAC professionals. When you turn the air conditioner condensing unit off these pressures equalize within five minutes.