Carrier Bryant Payne day and night 585A/YAC Installation Instructions Manual

LEGENDI B-Transformer2C-C00I Relay (SPOT)2D-‘Contactor (N. O.)2G-Heat Relay (821) (N. O.)3C-Condenser Motor3D-Evap Blower Motor3F-Compressor4A1 & 4A2“Run Capacitors5A-Gas Valve6B-Pilot Reignition7K-Limit Switch (SPOT)7P-Pressure Switch (N. O.)10B1 & 10B2-ConnectorsII E-Chassis Ground11 K-Ballast TubeFigure 13—Typical Line-to-Line Wiring Diagram for Units with Glow-Coil PilotLEGENDI B-Transformer2C-COOI Relay (SPOT)2D-Contactor (N. O.)2G-Heat Relay (821) (N. O.)3C-Condenser Motor3D-Evap, Blower Motor3F-Compressor4A1 & 4A2-Run Capacitors5D-Gas Valve6F-Pilot (Electronic Ignition)7K-Limit Switch10B1 & 10B2-ConnectorsII E-Chassis GroundFigure 14—Typical Line-to-Line Wiring Diagram for Units with RELITE Pilotdenser fan motor, and blower motor are all running.Observe that all motors stop when thermostat issatisfied,2. Move thermostat fan switch to ON position. Observethat blower fan runs continuously with thermostat setabove or below conditioned space temperature.CAUTION; Do not rapid-cycle compressor. Allow 5 minutesbetween cycles. Rapid-cycling can cause compressordamage.D. Sequence of Operation (Cooling)The following sequence of operation pertains to Models585A/YAC and 585A/YACR, 208- and 230-V units, sizes:036080, 036125, 042100, 048125, and 048150; however, thesequence of operation of all units is very similar. Refer to theline-to-line wiring diagram in Figures 13 and 14,NOTE: Although the unit wiring may vary slightly fromthat shown in Figures 13 and 14, the sequence of operationwill not be affected.With the thermostat system switch in COOL and FANswitch in AUTO, sequence of operation is as follows:When there is demand for cooling by the thermostat, ter¬minal R “makes” to terminals Y and G through the ther¬mostat. This circuit connects to compressor contactor coil(2D) and cooling blower relay coil (2C) across the 24-volt sec¬ondary of the transformer (lA) to energize the compressorcontactor and blower relay. The contacts of the energizedblower relay (2C) close, completing the circuit through thesingle-phase blower motor (3D) and starting the motor in¬stantly. The contacts of the energized compressor contactor(2D) close and complete the circuit through the compressormotor (3F) and condenser fan motor (3C), causing both mo¬tors to start instantly.All motors will continue to run and the cooling cycle will re¬main “on” until the thermostat is satisfied. When the condi¬tioned space temperature drops to the thermostat setting,the electrical connection from terminal R to terminals Y andG is opened in the thermostat. This open circuit deenergizesthe compressor contactor coil (2DJ and the cooling blower re¬lay coil (20. The blower, condenser, and compressor motorswill instantly stop. The cooling will remain “ofT’ until thereis another demand for cooling by the thermostat.IX. CARE AND MAINTENANCEWARNING: Never place anything combustible on or in con¬tact with the unit.Ib ensure continuing high performance, and to minimizepossible equipment failure, it is essential that periodic main¬tenance be performed on this equipment. Consult your localDealer as to the proper frequency of maintenance and theavailability of a maintenance contract.The ability to properly perform maintenance on this equip¬ment requires certain mechanical skills and tools. If you donot possess these, contact your Dealer for maintenance.WARNING; Disconnect all electrical power to unit beforeperforming any maintenance or service on unit.-12-

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