buftt

Claim 1

IN A NON-FLUSHING HEAT PUMP CONTROL SYSTEM HAVING A REFRIGERATION MOTOR COMPRESSOR, A FIRST HEAT EXCHANGER FOR HEATING OR COOLING SPACE AIR, A SECOND HEAT EXCHANGER, AND A CHANGEOVER VALVE FOR CONNECTING SAID COMPRESSOR TO SAID FIRST AND SECOND HEAT EXCHANGERS TO HEAT OR COOL THE AIR DEPENDING UPON SAID VALVE; A FIRST SPACE AIR TEMPERATURE RESPONSIVE SWITCH MEANS; FIRST RELAY MEANS HAVING AN ENERGIZATION WINDING; A SOURCE OF POWER; CIRCUIT MEANS INCLUDING SAID FIRST SWITCH MEANS FOR CONNECTING SAID ENERGIZATION WINDING TO SAID SOURCE; MEANS CONNECTING SAID FIRST RELAY MEANS WHEN ENERGIZED TO OPERATE SAID CHANGEOVER VALVE TO A HEAT POSITION UPON AN INITIAL CALL FOR HEAT BY SAID FIRST SWITCH MEANS; A HOLDING CIRCUIT TO MAINTAIN SAID FIRST RELAY MEANS ENERGIZED WHEN INITIALLY ENERGIZED UPON SAID CALL FOR HEAT, CIRCUIT MEANS INCLUDING SAID FIRST SWITCH MEANS FOR CONNECTING SAID COMPRESSOR TO SAID SOURCE UPON A NEED FOR HEAT, SECOND SPACE AIR TEMPERATURE RESPONSIVE SWITCH MEANS CLOSING UPON A NEED FOR COOLING IN THE SPACE, CIRCUIT MEANS INCLUDING SAID SECOND SWITCH MEANS FOR CONNECTING SAID MOTOR COMPRESSOR TO SAID SOURCE UPON A NEED FOR COOLING, AND CIRCUIT MEANS FOR CONNECTING SAID SECOND SWITCH TO RENDER SAID HOLDING CIRCUIT INEFFECTIVE WHEREBY SAID FIRST RELAY MEANS IS DEENERGIZED AND SAID CHANGEOVER VALVE PROVIDES FOR COOLING OPERATION.