Data Sheet for Product

ManualsBrandsSiemens Manuals3rd party integrationDesigo RXC21 Room Controller Application Notes Manual Supplement

Technical Specification Sheet

Rev. 1, May 2002

Document No. 149-436

Page 1 of 3

LTEC Variable

Air/Constant Volume

Controller

Description

The LonMark



-compliant LTEC™ Variable Air

Volume/Constant Volume (VAV/CV) Controller

provides direct digital control of pressure

independent, variable air volume, and constant

volume zone level routines. The versatile LTEC

VAV/CV Controller is designed to reside on the

Siemens Building Technologies, Inc. APOGEE



for

LonWorks



network, providing seamless interaction

with all LonMark products. The LTEC offers cost-

effective flexibility by allowing selection of the best-

point configuration platform designed to meet any

VAV/CV application requirement.

Features

• Conforms to the LonMark interoperability

guidelines enabling information sharing with

other LonMark products from other vendors

• LonMark

-compliant with Space Comfort

Controller functional profile number 8502

• Network-wide monitoring and commanding from

the Room Sensor and/or LTEC controller

• Advanced PID control minimizes offset and

maintains tighter set-point control

• Return from power failure without operator

intervention

• Separate minimum and maximum air volume

settings for heating and cooling modes



Applications

The LTEC VAV/CV Controller can be configured to

control a variety of VAV and CV pressure

independent zone applications, including:

• VAV/CV cooling only

• VAV/CV heating only

• VAV/CV with hot water reheat

• VAV/CV with electric reheat (up to three stages)

and/or baseboard radiation

• VAV/CV cooling/heating switchover

• VAV/CV with hot water reheat and/or baseboard

radiation

• VAV fan powered series or parallel with hot

water reheat

• VAV fan powered series or parallel with electric

reheat (up to three stages)

•

Hardware

Controller Board

Controller BoardController Board

Controller Board

The LTEC is available in the following styles:

• 4 Inputs, 6 Digital Outputs, 1 Room Sensor port,

1 Air Flow Sensor

• 5 Inputs, 8 Digital Outputs, 2 Analog Outputs, 1

Room Sensor port, 1 Air Flow Sensor

Summary of content (3 pages)

PAGE 1
Technical Specification Sheet Rev.
PAGE 2
The LTEC is a Neuron-based platform that executes a zone-level application and allows communication to all LonMark devices. The controllers are shipped with pre-loaded applications, reducing engineering start-up time. Regulatory Compliance FCC Part 15, Class B CISPR 22 Class B CE Mark C-tick Dimensions: 8.78”H x 6.94”W x 1.85”D (223 mm x 176 mm x 44 mm) Weight 1.13 LBS (.51kg) Room Sensor The room sensor connection to the controller board consists of a quick-connect RJ-11 jack.
PAGE 3
Information in this document is based on specifications believed correct at the time of publication. The right is reserved to make changes as design improvements are introduced. APOGEE is a registered trademark of Siemens Building Technologies, Inc. LonWorks, LonMark and LonTalk are registered trademarks of Echelon Corporation. © 2002 Siemens Building Technologies, Inc. Siemens Building Technologies, Inc. 1000 Deerfield Parkway Buffalo Grove, IL 60089-4513 Printed in the U.S.A.