Installation Instructions

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Document No. 550-168

October 26, 2016

PRC-OAVS with Pressurization Control

by Differential Flow Reset, with Heating

by BTU Compensation — Slow

Actuation, Floating or Analog Output

Item No. 550-168. Rev. BA Page 1 of 6

Generic Controller I/O Layout. See Wiring Diagram for application specific details.

Control Applications

2931

Product Description

These instructions explain how to field install or

replace the Pressurization Room Controller PRC.

This PRC-OAVS with Pressurization Control by

Differential Flow Reset, with BTU Compensation —

Slow Actuation Supply/Exhaust, Floating or Analog

Output features Pressurization Control by Differential

Flow Reset, Heating by BTU Compensation, and

Slow Damper (Supply/Exhaust) and Reheat

actuation using Floating or Analog Output actuators.

The PRC can operate stand-alone, with a field

panel, or as part of a network.

Product Numbers

PRC-OAVS— with Pressurization

Control by Differential Flow Reset

Application 2931

550-767HN

Offboard Air Module – two

required, order separately

550-819B

Shipping carton includes a controller assembly, a

mounting rail, and two self-tapping/drilling screws.

CAUTION

Keep the unit in its static-proof bag

until installation.

Otherwise, you run the risk of

damage to the printed circuit board

from electrostatic discharge.

Summary of content (6 pages)

PAGE 1
Installation Instructions Document No. 550-168 October 26, 2016 PRC-OAVS with Pressurization Control by Differential Flow Reset, with Heating by BTU Compensation — Slow Actuation, Floating or Analog Output Generic Controller I/O Layout. See Wiring Diagram for application specific details.
PAGE 2
Document No. 550-168 Installation Instructions October 26, 2016 Accessories Low cost temporary temperature 540-658P25 sensor, 10K Ω thermistor with RJ11 (1” long), that enables space control if the permanent room or duct sensor is not installed (pack of 25). Duct Temperature Sensor, NTC 10K Ω Type 2, 3" Probe for Commissioning only. QAM1030.008P50 Warning/Caution Notation WARNING Personal injury/loss of life may occur if you do not follow the procedures as specified.
PAGE 3
Document No. 550-168 Installation Instructions October 26, 2016 CAUTION Wiring Diagrams DO Wiring – Each DO provides a Normally Open (NO) terminal and a Common (C) terminal. To reduce noise and the potential for ground loops, both connections of a 24 Vac load must be wired directly to the DO terminal on the controller board. Offboard Air Module Wiring. 8. 9. Plug the room temperature sensor cable into the RTS port. Connect the power trunk.
PAGE 4
Document No. 550-168 Installation Instructions October 26, 2016 CAUTION NOTE: When wiring any actuator that uses a 0 to 10V control signal and ties AC neutral to DC common, an additional wire must connect the actuator AC neutral to the DC common of the PTEC/TEC AO being used to control the actuator. Each 4-20 mA sensor requires a SEPARATE dedicated power limited 24 Vdc power supply. DO NOT use the same transformer to power both the sensor and the controller.
PAGE 5
Document No. 550-168 Installation Instructions October 26, 2016 BACnet Pressurized Room Controller (PRC) – Application 2931 Wiring Diagram. Siemens Industry, Inc.
PAGE 6
Document No. 550-168 Installation Instructions October 26, 2016 Cyber security disclaimer Products, solutions and services from Siemens include security functions to ensure the secure operation of building automation and control, fire safety, security management, and physical security systems. The security functions on these products, solutions and services are important components of a comprehensive security concept.