Assessments - 1, GPA: 4
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These heat pump systems provide economy of operation through energy conservation. They recover heat for indoor comfort from outdoor air during the heating season and, by automatically reversing the refrigerant system, remove indoor heat and excess humidity during the cooling season. All models are ARI certified. FEATURES COMPRESSOR—Designed specifically for heat pump duty, with high energy efficiency during heating and cooling operation. Each compressor is hermetically sealed against contamination to assure long life and dependable performance, internally sprung and externally mounted on rubber isolators for quiet operation. Continuous compressor operation is approved down to — 40°F in the heating mode, and down to 55°F in the cooling mode. (See heating and cooling performance tables.) All models include a discharge-tube muffler to prevent sound transmission of the compressor pulsations to the indoors or outdoors. BUILT-IN RELIABILITY COMPONENTS—Includes a suction-tube accumulator that keeps liquid refrigerant from reaching the compressor; a low-pressure switch that stops the compressor if refrigerant charge is lost; a crankcase heater to keep the compressor oil warm and free of refrigerant for maximum lubricity; a compressor relief valve for high-pressure protection; and compressor quick-start components to assure reliable operation of the units during brownout conditions and low outdoor temperatures. PRINTED-CIRCUIT BOARD—The board incorporates a defrost control which contains the defrost relay, defrost timer, and low-voltage terminal board. The defrost control is a time/temperature initiation/termination control which includes three field-selecta-ble time periods of 30,50, and 90 minutes. The printed-circuit board also has a speedup feature that converts the defrost cycle time from minutes to seconds to aid in troubleshooting. WEATHER-PROTECTIVE CABINET—The low-profile design of the 544B units, with the pleasing malibu beige and jade exterior, blends in well with plants and shrubbery. Galvanized steel, coated with a layer of zinc phosphate to which a coat of alkyd melamine enamel is applied and baked on, is used throughout. This provides a hard, smooth finish that lasts for many years. All screws in the cabinet exterior are stainless steel for a durable, rust-resistant, quality appearance. TIME/TEMPERATURE DEFROST—The defrost cycle is initiated by a time/temperature control to clear the coil of frost and ice. The cycle is started only if the defrost thermostat senses ice buildup on the outdoor coil. After a few minutes, the control automatically returns the unit to the heating cycle. UNIT DESIGN—All units are equipped with totally enclosed fan motors for greater reliability under rain and snow conditions. The large, wraparound coil is designed for optimum heat transfer during heating and cooling. The vertical air discharge carries the sound and air up and away from adjacent patio areas and foliage. Sufficient space is provided between rows of composite coils so they can be cleaned with a common garden hose. A divider panel is installed between the compressor and coil section so that the unit can be checked and serviced while operating. EXTERNAL SERVICE VALVES—Both brass refrigerant service valves are externally located so that refrigerant tube connections can be made quickly and easily. Each valve has a service port for ease of checking operating refrigerant pressures. The valves are designed for refrigerant tube flare connections. PDS No. 544B.18 1В Clearance Requirements (In Inches) Bottom of unit to ground or normal snow level........... 6 Inlet air (both sides and coil end)........................12 Discharge air (top)........... 48 Service clearance (compressor end)........................30 NOTE: Unit can be installed with 6 In. clearance on LH side (facing control end of unit) when 24-in. clearance is maintained from RH side and coil end. A77131 DIMENSIONS (In Inches) Size A B c D E F G H 018 & 024 42 30 25-5/16 18-3/16 20-1/4 5-3/4 3/8 3/4 030 & 036 42 30 31-5/16 24-3/16 26-1/4 5-3/4 3/8 3/4 042, 048 & 060 42 30 41-5/16 34-3/16 36-1/4 6 3/8 3/4 CERTIFICATION APPLIES ONLY WHEN THE COMPLETE SYSTEM IS LISTED WITH ARI. SPECIFICAT10NS-544B SIZE 018 024 030 036 036 036 SERIES A A A A A A ELECTRICAL Unit Volts—Hertz—Phase 208-230—60—1 208-230—60—1 208-230—60—1 208-230—60—1 208/230—60—3 460—60—3 Operating Voltage Range 197—253 197—253 197—253 197—253 187—253 414-506 Unit Ampacity for Wire Sizing 13.5 15.5 20.3 23.0 15.5 6.9 Min Wire Size (60 Copper) (AWG)* 14 12 10 10 12 14 Max Branch Circuit Fuse Size (Amps) 20 25 30 40 25 10 Total Unit Amps 11.0 12.6 16.4 18.6 12.6 5.6 Compressor Rated Load Amps 10.0 11.6 15.4 17.6 11.6 5.1 Locked Rotor Amps 49.0 54.0 69.0 88.0 65.1 32.8 Fan Motor, HP & Type 1/10 &PSC Full Load Amps 1.0 I 1.0 I 1.0 I 1.0 I 1.0 I 0.5 COMPRESSOR AND REFRIGERANT » Compressor Hermetic Refrigerant Charge 7 lbs—14 oz I 7 l...