Wiring Guide

Table Of Contents

Application Note P399/P352/S352

Issue Date December 31, 2004

APPLICATION NOTE

P352 Staged ON/OFF Pressure Control

IMPORTANT: Use the P399 pressure transducer,

P352 pressure control and S352 stage module only

as operating controls. Where failure or malfunction

of the P399 transducer, P352 control or S352 stage

module 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 P399

transducer, P352 control and S352 stage module.

Application

Figure 1 and Figure 2 illustrate the wiring for

controlling multiple condenser fans, which are staged

On and Off by condenser pressure using a P352

pressure control, S352 stage modules, and a single

P399 pressure transducer.

Note: Maximum extended length of the WHA-P399

Wiring Harness is 100 ft.

P352-Y350_STAGED_CONTROL

Isolate and Tape

this end of shield.

P399 Transducer

Condenser

Pressure

WHA-P399 Wiring Harness

Fan

Motor 1

Fan

Motor 2

Fan

Motor 3

Fan

Motor 4

Figure 1: P352 Staged Pressure Control Application Powered by an Y350R with the P399 Transducer

Code No. LIT-9305020 www.johnsoncontrols.com

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Application Note P399/P352/S352 Issue Date December 31, 2004 APPLICATION NOTE P352 Staged ON/OFF Pressure Control Application IMPORTANT: Use the P399 pressure transducer, P352 pressure control and S352 stage module only as operating controls. Where failure or malfunction of the P399 transducer, P352 control or S352 stage module could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system.
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P399 Transducer Condenser Pressure WHA-P399 Wiring Harness Fan Motor 1 S352AA Fan Motor 2 S352AA Fan Motor 3 S352AA D352AA P353-24V-TRANS_STAGED_CONTROL P352AB Fan Motor 4 Figure 2: P352 Staged Pressure Control Using a Separate 24 VAC Power Supply with the P399 Transducer Located Less Than 50 Feet from the Control Controls Group 507 E. Michigan Street P.O. Box 423 Milwaukee, WI 53201 2 P352 Staged ON/OFF Pressure Control Application Note Published in U.S.A. www.johnsoncontrols.