What is the purpose of a refrigerant distributor?

As its name implies, the distributor’s function is to evenly distribute refrigerant throughout the evaporator’s circuiting. Once the larger nozzle of the expansion valve opens, the distributor helps maintain consistent flow velocity through the evaporator after the pressure drops.

What is a distributor nozzle?

The distributor or cellar nozzle (also called a Bresnan nozzle after one of its inventors) is designed to be used under the surface the operator is standing on. When their use is dictated, it’s usually because an inaccessible location or the intensity of a below-grade fire is preventing a direct attack.

What is refrigerant and how does it work?

As refrigerant absorbs heat from indoor air, it transitions from a low-pressure gas to a high-pressure liquid. Air conditioning components send the refrigerant outside where a fan blows hot air over the coils and exhausts it to the exterior. The refrigerant then cools down and turns back into a low-pressure gas.

What is refrigeration evaporator?

Evaporator: This is the part of the refrigeration system that is doing the actual cooling. Because its function is to absorb heat into the refrigeration system (from where you don’t want it), the evaporator is placed in the area to be cooled. The refrigerant vaporizes from the heat it absorbs heat in the evaporator.

What would the symptoms of a dirty coil be?

Symptoms of a Dirty Coil

  • Air Conditioning Loses Cooling Capacity. One thing that will be noticeable when the evaporator coil is dirty is that your AC won’t produce air that’s as cold as it should be.
  • Air Conditioning Runs Longer.
  • Coil Develops Frost During Operation.
  • Have an HVAC Professional Clean Your Coils.

What will happen if an expansion valve meters too much refrigerant into a DX coil?

How would a partially blocked orifice affect the operation of a thermostatic expansion valve? What will happen if an expansion valve meters too much refrigerant into a DX coil? Possibility of liquid in the compressor. 7.20.)

What is a distributor tube?

A refrigerant distributor is a device connected to the outlet of an expansion valve when paired with a multi-circuit evaporator. The outlet of the distributor is machined to accept tubing which connects the distributor to each evaporator coil circuit.

What do you pump a piercing nozzle at?

At 100 PSI (7 Bar) pressure, the piercing applicator nozzles flow 95 ±5 GPM (360 L/min). Water or foam solution shoots radially in uniform jets all around the circumference of the tip.

What is the cheapest refrigerant?

R410A refrigerant costs $4 to $8 per pound wholesale or $50 to $80 per pound installed. Recharging a home AC with R410A Freon costs $100 to $320 on average. R410A, also called Puron, is used in all new system installs. Puron is cheaper and more energy-efficient than Freon.

What are the types of evaporator?


  • Natural/forced circulation evaporator.
  • Falling film evaporator.
  • Rising film (Long Tube Vertical) evaporator.
  • Climbing and falling-film plate evaporator.
  • Multiple-effect evaporators.
  • Agitated thin film evaporators.

What is the principle of evaporator?

Rising film evaporators consist of a heat exchanger isolated from the vapour separator. The heat exchanger, or calandria, consists of 10 to 15 meter long tubes in a tube chest which is heated with steam. The liquid rises by percolation from the vapours formed near the bottom of the heating tubes.