Question

question 16 if the back - up is electric, when should the heat pump shut off? never when the temperature falls below the balance point when the cop is below 1.0 when the cop is below 3.0 when the electric current draw of the compressor and the electric heat combined exceed 50 amps

Explanation:

The emergency heat switch on a heat - pump is used to bypass the heat pump. When the temperature falls below the balance point, the heat pump's coefficient of performance (COP) becomes inefficient, and the back - up heat source (usually electric) is more effective. For the second question, when the temperature falls below the balance point, the heat pump should shut off as it becomes less efficient compared to the electric back - up heat.

Answer:

First question: to bypass the heat pump
Second question: when the temperature falls below the balance point