Morning, Sanjeev. Hope this post finds you well, and in good spirits and Welcome to the message board. Post often. Many thanks! Liquid line or suction line confusion!
Thanks for the help in advance! Short answers is high liquid line vs low suction line pressure of the refrigerant gas. You are right that was not correct term to use, my apologies.
Thank you for your response, you summed it up nicely and made everything clear! Compressor 2. Condensor 3. Expansion Valve 4. Evaporator 1. Why compression takes place :- compression takes place to raise the temperature and refrigerant pressure 2. What happen in condenser :- Heat is transferred from the refrigerant to a flow of water 3.
Expansion valve The expansion valve throttles the liquid refrigerant and maintains the pressure difference between the condenser and evaporator, while supplying refrigerant to the evaporator at the correct rate.
Suction line :- Evaporator Liquid line :- Condenser. Kindest regards. Keep on reading to see the five common problems you should look out for and what to do with them. Most heat pumps will run constantly during the cold weather.
This means that it is normal for your heat pump to be running constantly during winter when the temperatures are at or below 30 degrees. However, if the heat pump is running constantly in the cooling mode during the summer, then there could be a problem.
The fan only turns on when cooling or heating is required. The AC fan kicks in when needed and stops running when the job is done. Begin typing your search term above and press enter to search. Press ESC to cancel. Ben Davis May 14, What are three main HVAC system components located on the low pressure side? Where is the true suction line located?
Why is my suction pressure low? HVAC Controls. Topic Air Quality. Cost Savings. Energy Efficient. Major Repairs. Buying Home. Selling Home. New Equipment. Old Equipment. Latest Technology Trend. Type Article. Fact Sheet. Why is an accumulator is hot a heat pump but not on an air conditioning unit? Thanks, Scott. Hi Singh, Selection and sizing of a suction line accumulator is dependent upon whether it is intended as a field replacement or for a new application.
The Liquid line always carries liquid but the direction of flow reverses in each mode. Each coil has it's own metering device with a check valve piped in parallel.
When refrigerant flow meets a check valve in the blocked direction it has no choice but to divert through the TXV.
When refrigerant flow meets a check valve in the allowed direction it will take the route of least resistance and go through the check valve and ignore the TXV. There are TXVs that have this check valve function built right into the valve itself. Inside a bi-flo drier there are check valves which ensure that refrigerant flow goes through the drier core in the same direction regardless of the liquid line flow direction. The drier core must experience flow in one direction only.
Otherwise, if counter-flow was allowed debris that had been filtered out would unload and re-enter the system. The outdoor coil of a heat pump can frost up just like a freezer evaporator. The tendency to frost up increases with humidity and low ambient temperatures. There is fortunately a convenient method of defrosting the outdoor coil and that is to make the system run in the cooling mode. The outdoor coil becomes the condenser and the frost can be melted away.
To keep the heat where it is wanted the outdoor fan motor is temporarily shut off. All this happens automatically and is controlled by a solid state defrost control board. Every so often it will check the temperatures of some thermistors temperature sensitive resistors and if a defrost is needed it will activate the defrost mode.
Otherwise it will wait for the next trial for defrost. As the defrost continues, steam will rise out of the unit.
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