Air Conditioner Service Valve Operation

A description of the design of the service valve used on air conditioning units since the early 90s. Service valves are found in many applications of an air conditioning and refrigeration system.



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This eliminates the leak problems that these valves seem to have.

Air conditioner service valve operation. This video is part of the air conditioning series of. Understanding how your air conditioning system works is an excellent step towards achieving peace of mind that the air conditioner service you receive is both technically skilled and competitively priced. Ensure the service valves are in good condition and capped when not used.

Service valves can be set to three different positions figure 3. It is typically made of brass and is found at the base of the valve stem. The engineering mindset 557573 views.

Front seated position the valve stem is turned fully clockwise to effectively stop the flow of refrigerant vapour from the suction line union on the low pressure side of the compressor and to the discharge line union on the high pressure side of the compressor. This one demonstrates replacement of the service valve with a brazed fitting on the air conditioner. Many service valves will have this.

When opening a service valve make sure it is secured by placing it in a vise or attaching it to the compressor. Knowing the common valve positions is key to servicing and troublehooting. 66 videos play all air conditioning grayfurnaceman how txv works thermostatic expansion valve working principle hvac basics vrv heat pump duration.

Also look to see if the service valve has a packing gland nut. The packing gland nut helps to ensure a leak free seal. Leak problems and brazing are covered.



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