Heat-pumps contain a ____ that is used when the outside ambient temperature is too low to provide enough heat transfer.
A) more efficient refrigerant system
B) pressure-based system
C) restore system
D) back-up heating system
Correct Answer:
Verified
Q1: Terminal identification is used to simplify a
Q3: The schematic of a heat pump may
Q4: When the heat pump is used in
Q5: In the _, the outside heat exchange
Q6: The terminal board shows terminal connections marked
Q7: The two-stage thermostat is a thermostat that
Q8: Defrosting is done by disconnecting the condenser
Q9: A heat pump provides both heating and
Q10: The sequence timer is an on-delay timer
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