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Here, the refrigerant gas is again compressed, and then discharged through the third-stage variable guide vanes and into the third stage impeller.

Note: Inlet guide vanes are designed to modulate the flow of gaseous refrigerant to meet system capacity requirements they also prerotate the gas, allowing it to enter the impeller at an optimal angle that maximizes efficiency at all load conditions.Ĭompressed gas from the first-stage impeller flows through the fixed, second-stage inlet vanes and into the second-stage impeller. The gaseous refrigerant is then drawn through the eliminators (which remove droplets of liquid refrigerant from the gas) and firststage variable inlet guide vanes, and into the first stage impeller. Here, the liquid refrigerant absorbs enough heat from the system water circulating through the evaporator tubes to vaporize. When in the cooling mode, liquid refrigerant is distributed along the length of the evaporator and sprayed through small holes in a distributor (i.e., running the entire length of the shell) to uniformly coat each evaporator tube.

P = Adaptive Frequency Drive - Unit Mounted L = Solid State – Unit Mounted M = Solid State – Floor Mounted N = Solid State – Wall Mounted H = X-Line Full Volt – Unit Mounted J = Autotransformer – Unit Mounted L0 = (10 th and 11 th digit) Design SequenceĬ = Star Delta – Remote Mounted E = X-Line Full Volt – Remote Mounted Model Number Digit Identification C = (1 st digit) CenTraVac ® Hermetic V = (2 nd digit) CenTraVac ® Hermetic H = (3 rd digit) Direct DriveĠ91 = (5 th, 6 th, and 7 th digit) Nominal compressor tonnageī = Heat Recovery Condenser C = Auxiliary Condenser