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Resumen del manual
It puts the weather to work for you and lowers operating costs. Thermodynamically, there is no difference between a heat pump and an air conditioning unit or refrigerator. The heat pump moves heat from a colder heat source to a warmer heat sink thru the vapor compression cycle. (The same as a refrigerator or air conditioner.) The difference, from a practical standpoint, is in the heat pump's ability to reverse the roles of the evaporator and condenser coils. The heat pump takes advantage of the fact that even cold winter air contains heat that can be absorbed for heating a building. During cooling season operation, the unit can be set to reverse the evaporator and condenser coils, absorbing heat from inside the building and discharging it outside — like a standard air conditioner. The operating cost advantage of the heat pump occurs primarily during the heating mode. Depending on outdoor temperature, the heat pump can actually produce two to three units of heating energy for every unit of electrical energy it uses. The heat pump's cost saving reverse cycle prin1 ciple uses refrigerant circulated within a compact, closed circuit coil to absorb and transfer heat from one area to another. The process begins with the evaporator (cooling) coil absorbing heat from the air around it. The compressor then pumps the refrigerant to the condenser where this heat is then rejected to the surrounding air. As shown in the diagram, the heat pump makes double use of the two coils by means of a reversing valve. The two coils alternate as evaporator or condenser, depending on whether cooling or heating is required. Heating Cycle — Refrigerant enters the outdoor coil (evaporator) at a tower temperature than the surrounding outdoor air and heat is absorbed by refrigerant. The refrigerant then passes thru the reversing valve and into the compressor where it is brought to a high temperature and pressure. The hot refrigerant leaves the compressor, fiows thru the reversing valve to the indoor coif (condenser). Heat is then rejected to the return air from the hot refrigerant as the return air passes over the indoor coii (condenser). Cooling Cycle — The two coiis exchange roles as evaporator and condenser thru the action of the reversing valve. Aithough reversed, system operation is exactly the same. Refrigerant enters the evaporator {indoor coii) at a lower temperature than the return air, heat is absorbed from indoors, the ccoier air is then distributed throughout the building. Refrigerant ie3ves the evaporator, flows thru the reversing vaive and into the compressor where it is brought to a higher temperature and pressure. The hot refrigerant gas flows from the compressor, thru the reversing vaive and into the outdoor coif (condenser). The outdoor coii {condenser) rejects the heat from the hot refrigerant to the cooler outdoor air as it passes over the coil The heat transfer cycle is now ready to be repeated. JL © 2 A great performer... with unmatched versatility As the concern for energy grows and grows, Carrier's 50RQ/PQ single package heat pump looks better and better. Short gas supply and high cost electric power are no problem with these versatile units in operation. They're engineered for a wide range of application . . and installation is easy. For a curbed heat pump with plenum, in one piece ready to swing into place, there's the 50PQ rooftop Or select the RQ uncurbed ... on a slab for horizontal air delivery. Or take the RQ, attach the accessory plenum at the jobsite and it's a PQ With an excellent cooling EER, heating C.O P. among the highest in industry, factory installed options and field installed accessories, these units will match specifications for the most varied building requirements If you're looking for the reliable one, the efficient one, the flexible one . . the number 1 heat pump on the market, LOOK TO CARRIER! ii New compressor for heavy duty service — Carrier's new P compressor more than meets the rigorous demands of heat pump operation. Most efficient and reliable hermetic in Carrier equipment Thicker crankshaft Bigger bearing journals. Larger valves. Extra large oil pump. Crankcase heater. n Exclusive, innovative variable circuit refrigeration system — capacity and COP are among the highest in industry Maximizes refrigerant to air heat transfer on both heating and cooling cycles No other heat pump has it. Carrier Exclusive. <> Automatic defrost system — Keeps coil frost-free at temperatures below 40 F. Chrono-temp control activates defrost system every 90 minutes if required Automatically deactivates defrost cycle when coil is clear or after a maximum of 10 minutes. Carrier Exclusive. Signal-LOC™ — Carrier's new compressor protection system. Holds the compressor off the line if any operational or safety device trips the compressor Operation of any one of the following devices trips the compressor and lights an indicator light on thermostat low-pressure switch, high-pressure switch, in...