These and other objects of the present invention are attained by utilizing two four way reversing {TAIL ~ valves} in a refrigerant circuit between the inlets and outlets of the indoor and outdoor coils of {HEAD ~ the heat pump system} 
These and other objects of the present invention are attained by utilizing two four way reversing { TAIL ~ valves } in a refrigerant circuit between the inlets and outlets of the indoor and outdoor coils of { HEAD ~ the heat pump system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD