P470 Electronic Pressure Control with Display Product/Technical Bulletin 1
Refer to the QuickLIT Web site for the most up-to-date version of this document.
The P470 Electronic Pressure Control with Display is a
single-stage, On/Off, electronic pressure control with a
Single-Pole, Double-Throw (SPDT) output relay. The
control may be field set to operate in one of
three pressure ranges (0 to 100 psi, 0 to 500 psi, or
50 to 750 psi), as either an open-high or open-low
control.
The P470 control features a large LCD that displays
the sensed pressure and other system-status
indicators, as well as the adjustable setpoints in the
programming mode. The P470 control has a lockable,
three-button touchpad for adjusting setpoints, and a
front-panel LED that indicates the output relay status.
The P470 control uses a P499 Electronic Pressure
Transducer in conjunction with a WHA-PDK3 Wiring
Harness to sense system pressure. This arrangement
virtually eliminates the chance of a refrigerant leak
because there are no capillaries or bellows to break or
fail.
Figure 1: P470 Pressure Control with Transducer
and Wiring Harness (Control, transducer, and
harness must be purchased separately.)
Table 1: Features and Benefits
Features Benefits
Easy to Read Liquid Crystal Display (LCD) Clearly displays the sensed pressure (and other control information),
and in many situations pressure may be monitored without applying
gauges to the controlled equipment
Three Field-Selectable Pressure Ranges
between 0–750 psi
Provides the flexibility to cover most HVACR pressure applications with
three field-selectable pressure ranges; 0–100 psi with 5 psi minimum
differential, and 0–500 psi or 50–750 psi with 20 psi minimum
differential
24 VAC, and 120 or 208/240 VAC Models Increases application options, with two controls that cover most
common voltages
Lockable, 3-Button, Front-Panel Touchpad Deters tampering and over adjustment of control settings by
unauthorized personnel
Built-in, Adjustable, Anti-Short Cycle
Time-Delay
Reduces compressor short cycling and nuisance lockouts, which can
extend compressor life
Uses an Economical and Versatile Transducer
and Wiring Harness
Eliminates many of the constraints of capillary control applications and
allows up to a 100 ft (30.5 m) cable between control and transducer
P470 Electronic Pressure Control with Display
Product/Technical Bulletin
Code No. LIT-125528
Part No. 24-7664-2004, Rev. A
Issued January 26, 2012
Supersedes November 1, 2000
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