Install Instructions

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P266 Series Single-Phase Condenser Fan Speed Control Installation Instructions 1

Refer to the QuickLIT Web site for the most up-to-date version of this document.

Application

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 Johnson Controls® P66 Series and P215

Series Fan Speed Controls and provide additional

features and application flexibility.

Mounting

Location Considerations

Observe 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 Damage

Use 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 Condenser

Fan Speed Control Mounting Dimensions, mm (in.)

165

(6-1/2)

178

(7)

(3)

(2-5/8)

FIG:p266_dims

P266 Series Single-Phase Condenser Fan Speed Control

Installation Instructions

P266xxx-x

Part No. 24-7664-2705, Rev. E

Issued September 3, 2010

Supersedes August 27, 2010

Summary of content (12 pages)

PAGE 1
P266 Series Single-Phase Condenser Fan Speed Control Installation Instructions Part No. 24-7664-2705, Rev. E P266xxx-x Issued September 3, 2010 Supersedes August 27, 2010 Refer to the QuickLIT Web site for the most up-to-date version of this document. Application IMPORTANT: Use this P266 Series Single-Phase Condenser Fan Speed Control only as an operating control.
PAGE 2
Wiring 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. 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: ! WARNING: Risk of Electric Shock. Disconnect or isolate all power supplies before making electrical connections.
PAGE 3
Low-Voltage Wiring Figure 2 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 Wiring Figure 3 shows the high-voltage wiring diagrams for the P266A, P266B, and P266C Type control models. Figure 4 show the high-voltage wiring diagrams for the P266E Type control models.
PAGE 4
Table 1: Product Type High-Voltage Wiring Options and Voltage Ranges Product Type Number Split Winding/ Three Triac with Low-Speed Capacitor Two Triac with Low-Speed Capacitor 208/240 VAC 208/240 VAC 380/460 VAC 460/575 VAC 208/240 VAC 380/460 VAC P266AA See Figure 3A See Figure 3B -- -- See Figure 3C -- -- P266AB See Figure 3A See Figure 3B -- -- See Figure 3C -- --- Single Triac 460/575 VAC P266AC -- -- -- -- See Figure 3C -- P266AD -- -- -- -- See Figure 3C -- P26
PAGE 5
Start Voltage (VAC) P266 Control Input Line- Voltage (VAC) Start Voltage Value (%) Low Pressure Mode Low 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 Value Start 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.
PAGE 6
Start Voltage FIG:p266_CV_Rels 0 to Changeover Voltage ge a t l Vo LPM On Capacity r to Mo 66 P2 0 End Pressure Figure 6: Low-Speed Capacitor Operation 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 15 microfarads. Note: You must also set the Changeover Voltage value when a low-speed capacitor is used in your P266 Series control application.
PAGE 7
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 Table 2. Mode settings require you to position only one or two switches on the DIP switch block, depending on the mode. See Table 2 for more information about the values and modes that are associated with the number of LED flashes. 3. Position the DIP switches to set the new values and/or modes. See Setting up the DIP Switch Block.
PAGE 8
• a 24 VAC Class 2 power supply (only for P266 Series control models that require an external 24 VAC power supply) • a Low-Speed Capacitor (LSC), sized for the fan motor (only for P266 Series control 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 15 microfarads.
PAGE 9
. At 40% of maximum voltage, use the clamp-on ampere meter to check the current draw (in amperes) of the fan motor auxiliary windings connected to both capacitors and record the current draw for the auxiliary winding at 40% voltage. 10. Repeat Step 7 but increase the percent voltage value by 8%, then repeat Step 8, Step 9, and Step 10 at the increased voltage values until the current draw equals the (maximum voltage) current draw recorded in Step 4.
PAGE 10
Settings: ON or Off (Default Setting: Off Off) Number of Auxiliary Fan Stages (Switches 1 and 2) Changeover Voltage Value (Switch 1 to 64) Position switches 1-Off and 2-Off for no auxiliary fans. Position switches 1-On and 2-Off for auxiliary fan 1. Position switches 1-Off and 2-On for auxiliary fans 1 and 2. Position switches 1-On and 2-On for auxiliary fan 1, 2, and 3.
PAGE 11
P266 Electronic Pressure Transducers P266 Series controls are designed to reference either one or two Johnson Controls P266 Electronic Pressure Transducers to monitor condenser pressure. P266 transducers are specialized versions of the P499 Series Electronic Pressure Transducers designed for use with P266 Series controls. See Table 3 for the available P266 transducer models.
PAGE 12
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult Johnson Controls Application Engineering at (414) 524-5535. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. United States Emissions Compliance (FCC) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.