P266 Series Single-Phase Condenser Fan Speed ControlInstallation InstructionsP266xxx-xPart No. 24-7664-2705, Rev. DIssued August 27, 2010Supersedes April 8, 2010English1Français13Deutsch25Italiano37Español 49Nederlands61Svenska73Česky85Polski97P266 Series Single-Phase Condenser Fan Speed Control Installation Instructions1Application The P266 Series Single-Phase Condenser Fan Speed Control is a cost-effective, compact, weather-resistant, and durable speed control for single-phase PSC motors used in a wide variety of low-ambient refrigeration and air conditioning condenser applications.The P266 Series Fan Speed Controls are designed to replace the JohnsonControls® P66 Series and P215 Series Fan Speed Controls and provide additional features and application flexibility. MountingLocation ConsiderationsObserve these guidelines when locating and mounting a P266 Series Fan Speed Control:•Ensure that the mounting surface and mounting hardware can support the control and wiring.•Mount the P266 Series control upright on a vertical surface with the heat sink fins oriented vertically and the conduit/electrical holes facing down.•Ensure that air can flow through the heat sink fins and provide 10 cm (4 in.) minimum clearance around the heat sink.•Mount the P266 Series control in a location away from sources of excessive heat and within the specified ambient operating conditions. See Technical Specifications for ambient operating conditions.IMPORTANT:Use this P266 Series Single-Phase Condenser Fan Speed Control only as an operating control. Where failure or malfunction of the P266 Series Fan Speed Control could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the P266 Series Fan Speed Control.!CAUTION: Risk of Property DamageUse only single-phase Permanent Split Capacitor (PSC) motors approved by the manufacturer for speed control application with the P266 Series control. Failure to use a single-phase PSC motor may damage the motor and other property.Figure 1: P266 Single-Phase CondenserFan Speed Control Mounting Dimensions, mm (in.)165(6-1/2)178(7)76(3)66(2-5/8)FIG:p266_dimsP266 Series Single-Phase Condenser Fan Speed ControlInstallation InstructionsP266xxx-xPart No. 24-7664-2705, Rev. DIssued August 27, 2010Supersedes April 8, 2010P266 Series Single-Phase Condenser Fan Speed Control Installation Instructions2Wiring Refer to the model-specific wiring diagram located on the interior label of the P266 Series control and observe these guidelines when wiring the P266 Series control: •Ensure that the wires between the P266 Series control and the fan motor do not exceed 15 m (50ft).•Wires connected to the line-voltage terminal block must be 3.31 mm2 (12 AWG) or smaller.•Low-voltage wires must be less than 30 m (100ft).!WARNING: Risk of Electric Shock.Disconnect or isolate all power supplies before making electrical connections. More than one disconnect or isolation may be required to completely de-energize equipment. Contact with components carrying hazardous voltage can cause electric shock and may result in severe personal injury or death.IMPORTANT:Do not connect supply power to the P266 Series control before finishing wiring and checking all wiring connections. Short circuits or improperly connected wires can result in damage to the P266Series control and void any warranty.IMPORTANT:Do not exceed the P266 Series Fan Speed Control electrical ratings. Exceeding P266 Series control electrical ratings can result in permanent damage to the P266 Series control and void any warranty.IMPORTANT:Use 60/75 C copper conductors only. Make all wiring in accordance with local, national, and regional regulations.IMPORTANT:Electrostatic discharge can damage P266 control components. Use proper Electrostatic Discharge (ESD) precautions during installation and servicing to avoid damaging P266 components.Figure 2: P266 Series Control Physical Features and Low-Voltage Wiring 24 VAC Class 2 Supply Power Wiring for,, and Type Controls P266A P266BP266C24 VAC Class 2Power Supply120/240 VACPrimary SupplyPowerACFan 2 Starter(Optional)Fan 3 Starter(Optional)Fan 1 Starter(Optional)A123F24 VAC Class 2 Fan Control Wiringfor, , and Type Controls P266AP266BP266C24 VACVPCP1P266 ElectronicPressure TransducerIf a second P266 transducer is used,wire the P2 terminals the sameas P1 terminals.Pressure Transducer Class 2Wiring for ModelsAll P266WhtRedBlkDIP Switch Block Earth GroundConnectionPush-ButtonLEDM3M2M1L2/NL2/NACA123FVPCVPCP2P1Line-Voltage VACPrimary SupplyPowerFan 2 Starter(Optional)Fan 3 Starter(Optional)Fan 1 Starter(Optional)Low-Voltage (<30V)Class 2 PowerLow-Voltage (<30 V) Class 2 Auxiliary Fan ControlWiring forType Controls P266E C123FExternal Low-Voltage SELVPower SupplyFIG:P266_lwV_wirngP266 Series Single-Phase Condenser Fan Speed Control Installation Instructions3Low-Voltage WiringFigure2 shows the P266 Series control features under the housing cover and the low-voltage wiring diagrams for the P266A, P266B, P266C, and P266E Type control models. High-Voltage WiringFigure3 shows the high-voltage wiring diagrams for the P266A, P266B, and P266C Type control models. Figure4 show the high-voltage wiring diagrams for the P266E Type control models.Use Table1 to determine the high-voltage wiring options available for P266A, P266B, P266C, and P266E Type control models. IMPORTANT:The L2/N terminal must be connected to line voltage in order for a P266 Series control to comply with the FCC and IEC ClassB radio frequency interference emissions limit.Figure 3: High-Voltage Wiring Options for P266A, P266B, and P266C Type ControlsM3M2M1L1L2/NM3M2M1L1L2/NOptionalLow-SpeedCapacitor(LSC)AuxilaryCapacitorAuxiliaryWindingsMainWindingsPSCMotorLine VACM3M2M1L1L2/NOptionalLow-SpeedCapacitor(LSC)AuxilaryCapacitorAuxiliaryWindingsMainWindingsPSCMotor208/240 VACMainWindingsPSCMotorAuxilaryCapacitorAuxiliaryWindingsLine VACNote: Some P266A, P266Band P266C models do nothave M2 or M3 Triacs.Split Winding/Three Triac with LSC Wiringfor P266A Type Controls(208/240 VAC Only)Two Triac with LSC Wiring forP266A, P266B and P266C Type Controls(208/240 VAC, 460/575 VAC)380/460 VAC, and One Triac with LSC Wiring for P266A, P266B, and P266C Type Controls()208/240 VAC, 380/460 VAC, and 460/575 VACA BCFIG:p266_NA_HiV_wirngFigure 4: High-Voltage Wiring Options for P266E Type ControlsNote:Some P266E models do not haveM2 or M3 Triacs.M3M2M1L1L2/NL2/N208/240 VAC AuxilaryCapacitorAuxiliaryWindingsPSCMotorMainWindingsSingle Triac Wiringfor P266E Type Controls(208/240 VAC Only)M3M2M1L1L2/NL2/NPSCMotorMainWindingsAuxiliaryWindingsAuxilaryCapacitor208/240 VAC Split-Winding/Three Triac with LSC Wiringfor P266E Type Controls(208/240 VAC Only) M3M2M1L1L2/NL2/NPSCMotorMainWindingsAuxiliaryWindingsAuxilaryCapacitor208/240 VAC Two Triac with LSC Wiringfor P266E Type Controls(208/240 VAC Only)OptionalLow-SpeedCapacitor(LSC)OptionalLow-SpeedCapacitor(LSC)A BCFIG:p266_E_HiV_wirngP266 Series Single-Phase Condenser Fan Speed Control Installation Instructions4Setup and AdjustmentsAll P266 Series controls ship with factory-set default values and mode settings. In most applications, the default values and modes do not require field adjustment.If your P266Series control application requires you to change the value or mode settings, you must:1.Calculate the new values and determine the new mode settings required for your application. (See P266 Series Control Values and Modes.)2.Change the existing settings on the control to the new values and modes using the P266 Series control setup interface. (See Setting Values and Modes.)P266 Series Control Setup InterfaceThe P266 Series control setup interface consists of a DIP switch block with eight binary switches, a push button switch, and a green Light-Emitting Diode (LED) (Figure2). You can change the factory-set default values and modes by repositioning the DIP switches and saving the new settings. The number of LED flashes (in sequence) indicates which value and/or modes that you are saving. See Table2 for more information about LED flash sequences, values, and modes.During normal operation, the green LED is on. When you press and hold the push button, the LED goes off for 3 seconds then flashes two times. The LED then goes off again for 3 seconds and flashes three times, and continues in this pattern until seven flashes or until you release the push button. Each sequence of flashes indicates a value or a value and set of mode settings. Releasing the push button after the desired flash sequence saves the value and/or modes that are currently set on the DIP switch block. See Table2 for more information. After you complete the setup, set all of the DIP switches to the ON position to lock out the push button operation.P266 Series Control Values and ModesP266 Series controls have up to ten values and modes (in six flash sequences) that can be changed in the field. See Table2 for more information about flash sequences and the associated values and modes.Start Voltage ValueThe start voltage (VAC) is the voltage delivered by the P266 Seriescontrol to the fan motor to run the motor at minimum speed in your application. The Start Voltage value is a percentage of the P266 Series control’s input voltage. Use the following formula to calculate the Start Voltage value for your application.Table 1: Product Type High-Voltage Wiring Options and Voltage RangesProduct Type NumberSplit Winding/Three Triac with Low-Speed CapacitorTwo Triac with Low-Speed CapacitorSingle Triac208/240 VAC208/240 VAC380/460VAC460/575 VAC208/240 VAC380/460 VAC460/575 VACP266AASee Figure3ASee Figure3B----See Figure3C----P266ABSee Figure3ASee Figure3B----See Figure3C----P266AC--------See Figure3C----P266AD--------See Figure3C----P266BC------------See Figure3CP266BD------------See Figure3CP266BG------See Figure3B----See Figure3CP266BH------See Figure3B----See Figure3CP266EASee Figure4ASee Figure4B----See Figure4C----P266EBSee Figure4ASee Figure4B----See Figure4C----P266EC--------See Figure4C----P266ED--------See Figure4C----P266EE--------See Figure4C----P266EF--------See Figure4C----P266CH----See Figure3B----See Figure3CP266 Series Single-Phase Condenser Fan Speed Control Installation Instructions5Low Pressure ModeLow Pressure Mode determines whether the fan motor is either On (at start voltage/minimum speed) or Off when the sensed pressure at the P266 transducer is below the start pressure setpoint. Start Pressure ValueStart pressure (psi or bar) is the pressure setpoint at which the P266 Series control outputs the start voltage and runs the fan motor at minimum speed. Start Pressure value is a function of the start pressure setpoint and the pressure range of the referenced P266transducer. Use the following formula to calculate the Start Pressure value. See Table3 for P266 transducer pressure ranges. End Pressure ValueThe end pressure setpoint is the pressure (bar or psi) at which the P266 Series control outputs the End Voltage and runs the fan motor at maximum speed. End Pressure value is a function of the end pressure setpoint and the total pressure range of the referenced transducer. Use the following formula to determine your application End Pressure value. See Table3 for P266 transducer pressure ranges. Split Winding ModeSome single-phase PSC motors have split motor winding wire leads. Setting the Split Winding mode On enables the M2 Triac to provide voltage to the main windings (and not the auxiliary windings), which increases motor efficiency (Figure3A and Figure4A).Note:Split Winding mode is available for only 240VAC single-phase PSC motors that have split winding wire leads. Refer to the motor manufacturer’s installation instructions to determine if your fan motor may be wired to enabled the Split Winding mode. Copeland Digital Scroll™ Compressor ModeDigital Scroll Compressor Mode allows you to use the P266 Series control on a system that uses a digital scroll compressor. Failure to enable the digital scroll compressor mode when using a digital scroll compressor may cause your condenser fan to oscillate.End Voltage ModeEnd voltage is the voltage output by the P266 Series control (as a percentage of the full voltage) that is maintained when the monitored pressure is equal to or greater than the End Pressure. The End Voltage mode can be set to either 95% or 97% of the total input voltage. See Figure5. Start Voltage (VAC)P266 ControlInput Line- Voltage (VAC)Start VoltageValue (%)Start PressureSetpoint (bar or psi)P266 Transducer PressureRange (bar or psi)X250=Start PressureValue End PressureSetpoint (bar or psi)P266 Transducer PressureRange (bar or psi)X250=End PressureValueFigure 5: Relationship between P266 Fan Speed Control VariablesStartPressureEndPressure0StartVoltageEndVoltageModeLow Pressure ModeOffVoltage to MotorLowPressureModeOnPressure at SensorVoltage to MotorFIG:p266_Valu_RelsP266 Series Single-Phase Condenser Fan Speed Control Installation Instructions6Low-Speed Capacitor ModeIn some fan speed applications, a (user-supplied) Low-speed capacitor (LSC) can be connected to the P266 Series control’s M3 triac and the controlled fan motor (Figure3 and Figure4). The low-speed capacitor is enabled at low voltages to enhance the fan motor efficiency and performance. Set Low-speed Capacitor mode to On when a low-speed capacitor is used.Note:The optional low-speed capacitor should be equal in both the voltage range and the microfarad value to the auxiliary capacitor supplied by the manufacturer, but the capacitor must not exceed 15microfarads.Note:You must also set the Changeover Voltage value when a low-speed capacitor is used in your P266 Series control application. See Changeover Voltage Value and Determining Changeover Voltage Value for more information on setting the Changeover Voltage value.Auxiliary Fan Stage ModeYou can set the P266 Series control to cycle (On/Off) up to three additional (fixed-speed) fan motors or fan stages in conjunction with the variable speed fan controlled by the P266 Series control. Three low-voltage circuits (Figure2) can be wired to control the auxiliary fan motor/stage starters. See Table2 for information on setting the number of auxiliary fans used in your application.Figure7 shows a P266 Series control application with one auxiliary fan operating in conjunction with the speed-controlled fan. When the condenser load exceeds the output capacity of the speed-controlled fan, the P266 Series control powers On the auxiliary fan and shifts the speed-controlled (P266) fan to a new start pressure. Auxiliary Fan Overlap ValueAuxiliary Fan Overlap value determines the pressure range overlap (as a percentage of the total pressure [throttling] range) between the fan stages set up on the P266 Series control. The fan overlap value is equal for all auxiliary fan stages set up on the control.Increasing the Auxiliary Fan Overlap value decreases the (On/Off) cycling rate of the auxiliary fans and increases the pressure differential between auxiliary fan stages (which increases the pressure range of each auxiliary fan stage).Note:If the P266 Series control is set for no auxiliary fans, the Auxiliary Fan Overlap value is not used. See Table2 for information on setting the number of auxiliary fans used in your application.Changeover Voltage ValueThe Changeover Voltage value determines the voltage at which the P266 Series control enables and disables the M3 triac and the low-speed capacitor (Figure6). See Determining Changeover Voltage Value.Figure 6: Low-Speed Capacitor OperationStartPressureEndPressure0StartVoltageEndVoltageLPMOffVoltage to MotorLPM OnPressure at SensorLow-Speed CapacitorEnabled Low-Speed CapacitorDisabledVoltage to MotorChangeover VoltageCVFIG:p266_CV_RelsFigure 7: Speed-Controlled (P266) Fan Operating with One Auxiliary (On/Off) Fan Stageover the Entire Pressure RangeStartPressureEndPressure0Pressure at SensorTotal1stStageP266 Fan OutputAuxiliaryFanOutput % FanOverlapAux.FanPlusP266 FanOutputP266 FanStageShiftP266 Fan OutputOutput CapacityOnOffFan Throttling RangeFig:AuxFanOvrlapP266 Series Single-Phase Condenser Fan Speed Control Installation Instructions7Setting Values and ModesTo change settings and values on a P266 Series control:1.Determine the operating pressure setpoints (psi or bar), voltage inputs and outputs (VAC), and the other modes of operation required for your condenser fan motor control application.2.Convert the selected pressure setpoints (psi or bar) and voltage targets (VAC) into P266 Series control values. See P266 Series Control Values and Modes and Table2.3.Position the DIP switches to set the new values and/or modes. See Setting up the DIP Switch Block.4.Press and hold the push button until the number of LED flashes indicates the desired value or set of values and/or mode settings. Release the push button after:•two flashes to save the Low Pressure mode setting and the Start Voltage value•three flashes to save the Start Pressure value•four flashes to save the End Pressure value•five flashes to save the Split Winding, End Voltage, Low-speed Capacitor Mode, and Auxiliary Fan Stages mode settings•six flashes to save the Auxiliary Fan Overlap value•seven flashes to save the Changeover Voltage valueNote:See Table2 for more information about the values and modes that are associated with the number of LED flashes.5.Repeat Steps 3 and 4 for the next value and/or mode you need to change.6.After you save all of the new values and mode settings, set all of the DIP switches to the On position to lock out the push button operation. Setting up the DIP Switch BlockTo set new values and modes on the DIP switch block:1.Position all of the switches on the DIP switch block to the Off position.2.Position the numbered switches to ON so that the total of the switch numbers (in the ON position) equals the desired setup value. Start with the highest number switch that is less than the setup value. (For example, if the desired setup value is 185, position switch 128 to ON first. Then position switch 32 ON, followed by switch 16, switch 8, and switch 1 [128+32+16+8+1=185] [Figure8]).Mode settings require you to position only one or two switches on the DIP switch block, depending on the mode. See Table2 for more information about the values and modes that are associated with the number of LED flashes. Test Voltage ModeTest Voltage mode is a setup and diagnostic tool in the P266 Series control firmware that allows you to test a condenser fan motor’s operation at different voltage values in the field and determine the optimal Start Voltage value for your P266 Series control application. Test Voltage mode also allows you to determine and set the optimal Changeover Voltage value for the M3 triac in P266 Series control applications that use a low-speed capacitor.To use the Test Voltage Mode, you need:•a P266 Series control model designed for your condenser fan application•access to the condenser (and fan motor) controlled by your P266 Series control •a clamp-on ampere meter with 15 A range (to check changeover current draw when determining Changeover Voltage value)•an insulated probe to hold down the push-button and change the DIP switch positionsIMPORTANT:All of the switches on the DIP switch block must be set to the proper positions for your application before you press and release the push button to save the values and/or mode settings. See Table2 for more information on switch positions.Figure 8: A DIP Switch Block with the Switches Positioned for a Setup Value of 1851286432168421ONFIG:p266_DIP_swtchP266 Series Single-Phase Condenser Fan Speed Control Installation Instructions8•a 24 VAC Class 2 power supply (only for P266 Seriescontrol models that require an external 24VAC power supply)•a Low-Speed Capacitor (LSC), sized for the fan motor (only for P266 Seriescontrol applications that use a low-speed capacitor)Note:The LSC should be equal in both the voltage range and the microfarad value to the motor manufacturer’s auxiliary capacitor, but the LSC must not exceed 15microfarads.Setting up Test Voltage ModeBefore you power on a P266 Series control and enable the Test Voltage mode on the control:1.Read and follow the guidelines and procedures in the Mounting and Wiring sections.2.Mount and wire the P266 Series control in your condenser application and observe these additional guidelines:•Refer to the label inside the P266 Series control housing cover for model-specific wiring details. See Wiring for some wiring options.•Wire the auxiliary and main windings according to the motor manufacturer’s instructions and your application requirements. Split the windings (at the winding leads) and power them separately, if your application and motor allow for split-winding operation. See Figure3 and Figure4.•If your application uses an optional low-speed capacitor, wire the LSC to the M3 triac and motor only after you have checked and recorded the current draw at maximum. See Determining Changeover Voltage Value.•If your P266 Series control model requires an external 24 VAC power supply for control operation, wire that power supply to the control. (Refer to the wiring label inside the P266 Series control cover for external power supply requirements.)•You do not have to connect, wire, or power the P266transducer, or put a load on the condenser to operate a P266 Series control in the Test Voltage mode. Test Voltage mode allows you to use the DIP switch to set the voltage supplied to the motor by the P266 Series control.3.Set up the P266 Series control and the condenser fan motor for the intended operation, by setting the required values and modes of operation for your condenser fan application. See Setup and Adjustments for procedures. Determining Changeover Voltage ValueIn the Test Voltage mode, you can determine and set the Changeover Voltage value for P266 Series control applications that use an optional low-speed capacitor. To determine and set the Changeover Voltage value:1.Mount, wire, and set up the P266 Series control and the condenser fan motor for operation in the Test Voltage mode. See Setting up Test Voltage Mode. Note:Do not wire the low-speed capacitor until Step6 of this procedure. 2.Set all of the DIP switches except switch 1 to the ON position; set switch 1 to OFF.3.Apply line-voltage power to the P266 Seriescontrol (and the external 24 VAC power supply on required models), then, within the first 30 seconds after applying power, press and release the push button three times. The LED goes off and stays off, and the fan motor accelerates to maximum speed (at 95 or 97% of maximum voltage) and stays at the maximum voltage for up to 5 minutes.4.At maximum voltage, use the clamp-on ampere meter to check the current draw (in amperes) of the fan motor auxiliary windings and record the auxiliary windings current draw for the motor at maximum voltage.5.Disconnect line-voltage power to the P266 Series control (and the external 24 VAC power supply on required models).6.Wire the low-speed capacitor to the M3 triac and the motor auxiliary windings. (See Figure3 and Figure4 for M3 triac wiring options.)7.Set all of the DIP switches except switches 8 and 32 to the OFF position; set switches 8 and 32 to the ON position. (8 + 32 = 40% of maximum voltage value.)8.Apply line-voltage power to the P266 Seriescontrol (and the external 24 VAC power supply on required models), then, within the first 30 seconds after applying power, press and release the push button three times. The LED goes off and stays off, and the fan motor accelerates to the speed at 40% of the maximum voltage (for up to 5minutes).Next >