Fan Controls

Johnson Controls fan controls are pressure-actuated and solid-state electronic devices used to manage condenser fan motor speed and fan cycling on refrigeration and air conditioning applications. The lineup carried at SupplyHouse spans two primary series: the P266 Series, which is the current-generation single-phase condenser fan speed control covering 208 through 575 VAC with current ratings from 4 to 12 amps depending on model, and the P66 Series, a refrigerant pressure-actuated electronic motor-speed controller that remains available for existing installations and same-series replacements. Both series are designed for single-phase, Permanent Split-Capacitor motors approved by the motor manufacturer for speed control use. Pressure transducers for the P266 Series, the P266SNR-1C and P266SNR-2C, are also stocked, covering ranges up to 508 PSI and 754 PSI respectively. For commercial refrigeration and air conditioning work, Johnson Controls fan controls are the component that holds head pressure in check when ambient conditions don't cooperate.

KEY SUBCATEGORIES / PRODUCT TYPES

P266 Series Single-Phase Condenser Fan Speed Controls (SKUs: P266ACA-100C, P266ABA-100C, P266AAA-100C, P266BCA-100C, P266BHA-100C)

The Johnson Controls P266 Series Single-Phase Condenser Fan Speed Controls are electronic motor speed controllers designed for single-phase, Permanent Split-Capacitor motors in refrigeration and air conditioning condenser fan applications. P266 Series controls modulate fan motor voltage in direct proportion to refrigerant system pressure, which keeps the condenser from overcooling on cold ambient days and maintains adequate head pressure when the system needs it. The P266 Series covers 208 through 575 VAC at 50/60 Hz, with current ratings from 4 to 12 amps across the lineup. At 208/240V, the P266ACA-100C handles up to 8 amps with 1 Triac output. For applications needing staged auxiliary fan control at 208/240V, the P266ABA-100C and P266AAA-100C both support 8 amp max with 3 Triac outputs. The P266BCA-100C is the single-Triac model at 208/240V for straightforward single-fan condensers, and the P266BHA-100C covers 460/575V applications at 4 amp max with 2 Triac outputs. All P266 Series controls come in a NEMA 3R, IP54 weather-resistant enclosure with an integral metal heat sink. The P266 Series replaces the Johnson Controls P66 Series and P215 Series fan speed controls.

P66 Series Electronic Fan Speed Controls (SKUs: P66AAB-1C, P66AAB-34C, P66BAB-1C, P66ABB-24C, P66ABB-28C)

The Johnson Controls P66 Series Electronic Fan Speed Controls are refrigerant pressure-actuated, electronic motor-speed controllers for single-phase permanent split-capacitor motors approved for speed control applications. P66 Series controls directly sense condenser refrigerant pressure through a 60-inch capillary connection and automatically adjust fan motor speed in response, serving as an alternative to on/off fan cycling control in small and medium-size refrigeration and HVAC applications. Two pressure ranges are represented in the stocked lineup: 190 to 250 PSIG, covered by the P66AAB-1C, P66BAB-1C, and P66ABB-24C, and 320 to 410 PSIG, covered by the P66AAB-34C and P66ABB-28C. The P66 Series is the predecessor to the P266 Series and remains available for existing P66 installations where a same-series replacement is the preferred approach.

P266 Series Pressure Transducers (SKUs: P266SNR-1C, P266SNR-2C)

The Johnson Controls P266 Series Pressure Transducers are stainless steel, remote-mount sensors built to work with P266 Series fan speed controls. The P266SNR-1C covers 0 to 508 PSI with a 1/4-inch SAE female flare connection and a 2-meter cable. The P266SNR-2C covers 0 to 754 PSI with the same connection type and cable length. P266 Series controls can accept one or two transducers simultaneously. On dual-transducer installations, the control references the higher of the two pressure readings to govern motor speed, which is the correct behavior on split-circuit or multi-circuit condensers where refrigerant pressure may differ between circuits.

BUYING GUIDE / HOW TO CHOOSE

Choosing the right Johnson Controls fan control from the available SKUs starts with three variables: motor voltage, current draw, and Triac count.

Motor voltage narrows the field immediately. At 208/240V, the P266 Series options are the P266ACA-100C (1 Triac, 8 amp max), the P266BCA-100C (single Triac, standard single-fan), the P266ABA-100C (3 Triac, 8 amp max), and the P266AAA-100C (3 Triac, 8 amp max). At 460/575V, the P266BHA-100C is the correct choice at 4 amp max with 2 Triac outputs. Confirming motor nameplate voltage and full-load amps before selecting a P266 Series control is non-negotiable, since current ratings differ across models.

Triac count reflects how many condenser fan stages the application needs to control. Single-Triac models handle a single variable-speed fan motor. Two-Triac and three-Triac models support auxiliary fan stage outputs, which matters on multi-fan condensers where one fan runs at variable speed and additional fans cycle on at fixed speed based on pressure demand.

For applications running an existing P66 Series installation, the stocked P66 Series SKUs split into two pressure groups: the 190 to 250 PSIG range (P66AAB-1C, P66BAB-1C, P66ABB-24C) and the 320 to 410 PSIG range (P66AAB-34C, P66ABB-28C). Matching the replacement to the original pressure range is the key selection step. For new installations, the P266 Series is the correct specification.

Transducer selection for P266 Series installations follows system pressure range. The P266SNR-1C covers up to 508 PSI and the P266SNR-2C covers up to 754 PSI. On dual-transducer setups, the control selects the higher reading, so transducer range should accommodate the highest expected pressure in the system.

FAQs

Which P266 Series SKU is right for a 208/240V single-fan condenser application?

The P266BCA-100C is the single-phase condenser fan speed control designed for standard 208/240V single-fan installations. For applications needing auxiliary fan stage output at 208/240V, the P266ACA-100C covers 8 amp max with 1 Triac output, and the P266ABA-100C and P266AAA-100C both handle 8 amp max with 3 Triac outputs for staged multi-fan configurations. Confirming motor nameplate voltage and full-load amps before selecting among the P266 Series models at this voltage range is required, since current ratings vary.

What is the difference between the P66 Series and P266 Series Johnson Controls fan speed controls?

The difference between the P66 Series and P266 Series is that the P266 Series is the current-generation replacement designed to supersede both the P66 Series and P215 Series fan speed controls. P266 Series controls include a NEMA 3R, IP54 weather-resistant enclosure with integral metal heat sink, wider voltage coverage from 208 through 575 VAC, and current ratings from 4 to 12 amps. P66 Series controls remain available for existing P66 installations and use a 60-inch capillary to sense refrigerant pressure, covering ranges of 190 to 250 PSIG and 320 to 410 PSIG in the stocked lineup.

What pressure transducers are compatible with the P266 Series fan speed controls?

The P266 Series fan speed controls are compatible with the P266SNR-1C and P266SNR-2C pressure transducers. The P266SNR-1C covers 0 to 508 PSI with a 1/4-inch SAE female flare connection and a 2-meter cable. The P266SNR-2C covers 0 to 754 PSI with the same connection style and cable length. P266 Series controls can accept one or two transducers, and on dual-transducer configurations the control uses the higher of the two pressure readings to govern fan motor speed.

What is the pressure range difference between the P66AAB-1C and the P66AAB-34C?

The difference in pressure range between the P66AAB-1C and P66AAB-34C is that the P66AAB-1C is rated for 190 to 250 PSI applications while the P66AAB-34C is rated for 320 to 410 PSIG applications. Both are P66 Series refrigerant pressure-actuated controls with 60-inch capillary connections, designed for single-phase PSC motors. Selecting the correct pressure range requires matching the control to the operating pressure range of the refrigerant system at the condenser.

Can P266 Series controls handle multi-fan condenser applications?

The Johnson Controls P266 Series can handle multi-fan condenser applications on models with multiple Triac outputs. The P266ABA-100C and P266AAA-100C both offer 8 amp max with 3 Triac outputs at 208/240V, supporting control of additional auxiliary fixed-speed fan stages. The P266BHA-100C at 460/575V provides 2 Triac outputs at 4 amp max. For applications requiring dual-circuit pressure sensing, P266 Series controls can accept two P266 Series Pressure Transducers simultaneously, with the control referencing the higher pressure reading to manage motor speed.