Product Overview
Table Of Contents
P66 Series Electronic Fan Speed Controls Product Bulletin 1
The P66 Series Electronic Fan Speed Controls are
refrigerant pressure actuated, electronic motor-speed
controllers. The P66 controls are designed for use with
single-phase permanent split-capacitor motors that are
approved by the motor manufacturer for speed control
applications.
The P66 controls provide condenser pressure control
by directly sensing condenser refrigerant pressure and
automatically adjusting the condenser fan motor speed
according to the sensed pressure.
The P66 provides an alternative to fan cycling control
in many small and medium size refrigeration and
Heating, Ventilating, and Air Conditioning (HVAC)
applications.
Figure 1: P66 Dual Sensor Fan Speed Control
Table 1: Features and Benefits
Features Benefits
Exclusive Johnson Controls/PENN®
Pressure Transducer
Responds quickly to condenser pressure changes and condenser air delivery
requirements
Soft Start Capability Provides a smooth fan startup, which reduces motor-starting noise and abrupt
changes in motor speed
208-240/277/480 VAC, 60 Hz Motor
Control
Suitable for a wide range of condenser fan motor applications
One or Two Pressure Transducers Applicable to single- and multi-circuit condensers. The dual-sensor P66 control
models select the higher pressure input to control the fan speeds.
Two Effective Throttling Ranges
(ETRs)
Provide either a 30 or 60 psi (207 or 414 kPa) ETR
NEMA 1 or NEMA 3R (Rainproof)
Enclosure
Allows indoor and panel mounting or outdoor mounting applications
Built-in Voltage Surge Protection,
Radio Frequency Interference (RFI)
Suppression, and Ground Terminal
Screw
Achieves trouble-free operation
P66 Series Electronic Fan Speed Controls
Product Bulletin
Code No. LIT-125465
Issued March 23, 2006
Supersedes September 23, 2004