Heat Pump Prep Questions and Verified Answers

It is not always a good idea to immediately connect a standard gauge manifold set and hoses to a heat pump when a problem is suspected because; - the charge is critical, sometimes plus/minus 1/2 oz. Refrigerant Which component is responsible for changing the direction of the flow of refrigerant? - Reversing valve Some heat pump system use a ___________as a metering device - fixed orifice The slide valve and piston in the reversing valve is actuated by pressure directed through the; - solenoid and pilot valve During the heating cycle, the outdoor coil is used as; - the evaporator During the cooling cycle, the indoor coil becomes; - the evaporator During the defrost cycle, the outdoor fan is usually; - turned off Heat pump systems which use a thermostatic expansion valve at each coil will also have; - a by-pass lines with check valve Refrigerant flow though the compressor; - is always the same regardless of operating mode Because of the possibility of liquid flood-back, a heat pump that uses a reciprocating compressor should be equipped with a; - suction accumulator A scroll type compressor; - is less susceptible to damage from liquid flood-back On a split system heat pump, a "no heat/no cooling" service call, you turn the thermostat to the fan on/cont position and the indoor fan operates. This action verifies that; - the transformer is functioning What is the difference on most air-to-air heat pumps; - The indoor and outdoor coils are different physical size and capacity A heat pump system, operating at 45F ambient, may be ______ efficient than electric resistance heat - 3 to 4 times more