Assessments - 2, GPA: 5 ( )

Fabricante : Sears Arquivo Tamanho: 571.23 kb Arquivo Nome : Língua de Ensino:

All electrical work MUST conform with the requirements of local codes and ordinances and the National Electrical Code NFPA 70 current edition. Electrical Heaters & Operating Controls Timelow voltage transformer and the fan control are standard on a!l models and are prewired at the factory. To operate the blower coil, a heater accessory or a no-heat kit must be installed. Line voltage connections are made to the heater accessory or the no- heat kit. Low Voltage Control Connections The 24 volt power supply is provided by an internally wired low voltage transformer which is standard on all models. If power supply is 208 volt, the low voltage transformer must be rewired to the 208 volt tap. See the unit wiring label. Field supplied low voltage wiring can enter the unit on the top left hand corner or the left hand side panel. When using the left hand side panel entrance, the low voltage wiring must be fed through the entrance hole in the bottom of the control box. Install the strain relief bushing (supplied with unit) in the selected hole and a hole plug (supplied with unit) in the unused hole. Connect the field wiring at the screw terminals of the control board. Refer to Figure 9. Keep the low voltage wiring as short as possible inside the control box. Complete connections between indoor blower, outdoor section, indoor thermostat and electronic outdoor thermostat (accessory) according to instruction provided with the Condenser Installation Instructions or those provided with the accessory and refer to Figure 10. Install No Heat Kit If electric heat is not used, install accessory No Heat Kit. 1.. Locate adapter and filler plates, with screws inside package unless they were preinstalled at the factory. 2.. If necessary, attach adapter plate and filler plate to bracket as required to match cabinet, Refer to Figure 9. 3.. Secure the no heat accessory with four screws. 4.. Connect the plug from No Heat Kit wiring into the receptacle on the control board on the side of the cabinet. Overcurrent Protection Supply Maximum No Heat Supply Circuit Circuit Motor Model Volts Phase He_z No. AMPS. AMF00tNH 240 1 60 Single 6.0 208 1 60 Single 6.0 Electric Furnace I The power supply wiring to the unit MUST be provided with over- current protection. Governing codes may require this to be fuses ONLY or circuit breakers. For blower cabinets without heaters, a 15 amp circuit may be used. Line Voltage Connections Line voltage wiring may be brought into the unit through the top right-hand corner or the right-hand side panel. The correct hole size required by the conduit fitting must be punched at the pilot hole location. Plug the unused pilot hole with a hole plug (supplied with unit). Refer to Figure 9 for line voltage connections. Grounding Use a copper conductor (#14AWG) from the unit to a grounded connection in the electric service panel or a properly driven and electrically grounded ground rod. Line Voltage Connection 1. A disconnect switch MUST be located within sight of the unit. 2. Provide line voltage power supply (208V-240V) from a separate 15 amp circuit. 3. Connect line voltage L1 and L2 to the lugs on the No Heat Kit, Figure 9. Figure 9 Installing No Heat Accessory Low Voltage / Matching Receptable Connections /_;_Z] / For No Heat Kit _,_ ____/._ or Electric Heater Adapter Plate _ 0_"--.._ _ No Heat Kit. '_: _,_ __/ Lugsfor Line Voltageand Ground Connections Total AMPS. 6.0 6.0 No Heat Kit Technical Branch Circuit Ampacity 7.5 7.5 Maximum Overcurrent Protective Device (AMPS.) 15 15 Data No. 2 2 Recommended Supply Wire 750 C. Copper Max, Size Length (Ft) 14 104 14 90 Ground Wire No. Size 1 14 1 14 L_J 442 01 2204 01 I Electric Furnace Installation Instructions Changing Motor Speed The blower motor comes from the factory wired for medium or high speed. To change the blower speed, disconnect the black wire at the blower motor termina! block and reconnect at the desired blower speed tap. Connections Figure 10 I Typical Low Voltage Thermostat Cooling Only Outdoor Unit R G Y Y Y W 00 0 OOI) W2 W1 G Y OH C R 1 Indoor Blower Cooling with Electric Heat Thermostat R G - Y y - Y Outdoor Unit wOwO (> () ! Heat Pump with Electric Heat Staging Thermostat R BL W --y O Outdoor Unit 442 01 2204 01 Air Flow Check For proper system operation, the air flow through the indoor coil should be between 350 and 450 cfm per ton of cooling capacity. The air flow through the unit can be determined by measuring the external static pressure to the unit and selecting the motor speed tap that will most closely provide the required air flow. 1. Set up to measure external static pressure at the supply and return duct connections (Figure 11). 2. Drill holes in the ducts for pressure taps, pitot tubes, or other accurate pressure sensing devices. 3. Connect these taps to a level inclined manometer or draft gauge. 4. Ensure the coil and filter are clean, and all the registers are open. 5. Determine the external static pressure with the blower operating. 6. Ref...

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