LineSetCalc™ - Split System AC&HP LineSet Calculator
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Total Equivalent Length
A tight bend or LR 90°
fitting in the vapor line
is assumed to also be in
the liquid line.
Use of a Tubing Bender
is the preferred method
Pairs of tight
bends or 90°s
Use low stage capacity for 2
Capacity at indoor design
conditions is recommended.
Liquid line Calculations
Vapor line Calculations
For new installations and equipment change outs, lineset sizing is critical for full capacity, efficient operation and a long lasting compessor. Especially important when indoor and outdoor units are separated by a long distance or height. Crankcase heaters, Start kits and Non-bleed (hard shut-off) TXVs or Liquid Line Shutoff Solenoids can prevent premature compressor failure. It is no wonder that equipment manufacturers who include these accessories as standard have a reputation for long lasting quality.
Maximum Vapor Line Temperature Drop (from friction loss)
Maximum Liquid Line Temp. Drop (from friction loss)
R-22 Maximum Total Equivalent Length without "Long Line" protection
Minimum Riser Vapor Velocity
R-410a Maximum Total Equivalent Length without "Long Line" protection
Minimum Horizontal Vapor Velocity
Maximum Total Equivalent Length with "Long Line" protection
Maximum Vertical Separation Compressor Below
Maximum Vertical Separation Compressor Above
Calculations are for prefabricated annealed copper tubing linesets with capacities of 9 to 90 kBtu/h (0.75 to 7.5 tons).
Liquid refrigerant capacity per foot calculations @105F, Vapor calculations @40F
Heat pumps having equivalent lengths over 100 ft, the outdoor piston should be increased one size.
The information contained in this calculator represents the opinions and suggestions of Efficient Comfort and the application of the equipment and system suggestions by Efficient Comfort are suggestions and guidelines only. Efficient Comfort does not assume responsibility for the performance of any system as a result of these suggestions. The systems engineer is responsible for the system design and performance.
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