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How to Read HVAC Chiller Nameplate for Short Circuit Analysis

How to Read HVAC Chiller Nameplate for Short Circuit Analysis

How to Read HVAC Chiller Nameplate for Short Circuit Analysis

(OP)

I am working on short circuit calculations for a system. There is an HVAC unit (nameplate attached). I did verify (Unit Power Supply) the cable and upstream protective device do meet the minimum circuit ampacity and max circuit breaker size, respectively. I have the following questions about the nameplate and how should it be modeled in the study software :

  1. I understand there are motors for compressors. Will this HVAC unit be modeled as an induction motor in study software?
  1. How to determine the HP/kW rating of this unit from the nameplate?
  1. Namepate shows TWO systems on the nameplate what does it imply? Is one backup to another?

RE: How to Read HVAC Chiller Nameplate for Short Circuit Analysis

Yes, there are two systems in there, each with two scroll compressors that have 55.8RLA @ 200V 3 phase and 2 fans with 7.6RLA. So a total of 4 scroll compressor and 4 fan motors.

Link to manual, go to page 82.


" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden

RE: How to Read HVAC Chiller Nameplate for Short Circuit Analysis

(OP)

Thank you, @jraef. Now I understand. In the manual on page 38, I see the kW also listed (attached snapshot). Here the total kW will be 66.7kW for the whole system correct?

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