![]() ![]() I would say use this feature if you are not comfortable. One to communicate with the HP so all stages can be utilized the other for the furnace and will I still be able to use the blower in the furnace for both.Īccording to Lennox here are the specifics for “Follow Me” mode: Follow Me button. Is there some way I can delay the blower start-up say with a disc thermostat on the coil to start the blower after it gets to about 80 degrees or so. Because defrost is set on a timer, it will sometimes go into defrost before it heats the house. As heat is ramping up the circulating cold air through-out the house has brought the temp down which makes the HP run longer. HP puts out about 90-100 Degrees but takes a long time 20-25 min. System works but defaults to stage 2 of 5 because of non communicating furnace or coil. I have a TVH8 Tempstar(communicating) HP with the NAXA00101DB Daughter Board and Observer Thermostat to allow it to work with a non communicating Thermo Pride OL6 oil furnace. Understanding the heat pump sequence of operation will help you identify the issue quicker, therefore solving the problem faster. Control problems include relays, the heat pump thermostat, and anything in the control circuitry of the system. Is it a control problem or is it a mechanical problem? Mechanical problems include refrigeration issues, airflow issues, and mechanical parts. If you are troubleshooting heat pump problems you will want to break things down into groups. These systems are referred to in the HVAC field as dual fuel systems and are considered more efficient than heat pumps with electric heat strips for backup heat. It works the same as with the heat strips described above except instead of electric heat strips providing the heat the gas or oil furnace provides the heat. There are also heat pumps that have gas or oil furnaces for the backup heat. Everything switches back to normal heat pump mode. This timed cycle ends after a certain amount of time as determined by the manufacturer of the heat pump. The defrost control energizes the backup electric heat so the heat pump continues to provide heat. It is counteracted through heating strips by the defrost control. This is necessary to defrost the condenser coils. ![]() This switches the whole heat pump system into an air conditioner in the cooling mode. When the defrost cycle energizes, the reversing valve switches mode to the air-conditioning mode. Heat Pump Sequence of Operation - Defrost and Backup Heating Methods The time interval in the defrost cycle is manually set by the HVAC installation technician when the unit is installed and will vary from region to region. When the heat pump runs for a specified time the defrost cycle will kick in and thaw out or defrost the frost or ice on the condenser coils. Regular readers who read the Heat Pump pages here at High Performance HVAC will know the defrost cycle method is typically on a timer. ![]()
0 Comments
Leave a Reply. |