Installation Instructions

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Document No. 550-138

October 26, 2016

BACnet PTEC Constant Volume

Controller

Item No. 550-138. Rev. CA Page 1 of 6

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

Control Applications

6660, 6662, 6663

Product Description

These instructions explain how to field install or

replace a Siemens BACnet PTEC Constant Volume

Controller.

Warning/Caution Notation

WARNING

Personal injury/loss of life may

occur if you do not follow the

procedures as specified.

CAUTION

Equipment damage or loss of

data may occur if you do not

follow the procedures as

specified.

Product Numbers

Siemens BACnet PTEC Constant

Volume Controller

550-498PA

Shipping carton includes a controller assembly, a

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

Summary of content (6 pages)

PAGE 1
Installation Instructions Document No. 550-138 October 26, 2016 BACnet PTEC Constant Volume Controller Generic Controller I/O Layout. See Wiring Diagram for application specific details. Control Applications CAUTION 6660, 6662, 6663 Product Description These instructions explain how to field install or replace a Siemens BACnet PTEC Constant Volume Controller. Warning/Caution Notation WARNING Personal injury/loss of life may occur if you do not follow the procedures as specified. Item No. 550-138.
PAGE 2
Document No. 550-138 Installation Instructions October 26, 2016 CAUTION Keep the unit in its staticproof bag until installation. Otherwise, you run the risk of damage to the printed circuit board from electrostatic discharge. Accessories Low cost temporary temperature 540-658P25 sensor, 10K 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 QAM1030.
PAGE 3
Document No. 550-138 Installation Instructions October 26, 2016 3. Remove the controller from the static proof bag and snap it into place on the mounting rail. 4. Connect the FLN. 7. Connect the power trunk. DO NOT apply power to the controller without first consulting the specialist. This TEC is designed to work with 2-wire AC power. (Neutral and Phase (hot) at 24 Vac +/- 20%.
PAGE 4
Document No. 550-138 Installation Instructions October 26, 2016 Wiring Diagrams NOTE: If the voltage/current switch is set to current and a 4 to 20 mA sensor is connected to an AI, then special wiring requirements must be followed. CAUTION The controller’s DOs control 24 Vac loads only. The maximum rating is 12 VA for each DO.
PAGE 5
Document No. 550-138 Installation Instructions October 26, 2016 Application 6660 – Constant Volume Cooling Only. Siemens Industry, Inc. Application 6662 – Constant Volume with Electric Reheat.
PAGE 6
Document No. 550-138 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.