Need help?Do you have a question about the Carrier 39E/ER and is the answer not in the manual?
Discusses the critical decision to select factory or field supplied components early in the ordering process.
Covers fan speed and horsepower limits for 39E/ER air handlers as per Table 1 for minimum bearing life.
Compares fixed and variable pitch drives, recommending fixed for most applications due to balancing issues.
Explains service factor for overloads and discusses factors contributing to drive losses and energy efficiency.
Details standard motor speeds, ODP vs. TEFC motor recommendations, and voltage considerations.
Recommends high-efficiency motors for inverter applications to handle extra heat and improve motor life.
Outlines the step-by-step process for selecting factory-supplied drives using unit size and fan data.
Provides a detailed procedure for selecting factory-supplied drives, including calculating for drive loss and checking speed ranges.
Discusses how internal mounting protects motors from shipping damage and improves motor life.
Explains the benefits of increased service factor and improved heat dissipation for internally mounted motors.
Compares heat added by internally vs. externally mounted motors and provides calculation formulas.
Details motor mounting positions (Left/Right) based on discharge arrangement and drive access.
To Next Page
General