Installation Instructions

ManualsBrandsSiemens ManualsRoom controlsRoom Condition Monitor, RPM series

Document No. 550-166

October 26, 2016

LCM-OAVS Room Pressurization with

Two Fast Acting Venturi Air Valves

(One Exhaust, One Supply) and HW

Reheat

Item No. 550-166. Rev. BA Page 1 of 8

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

Control Applications

2920, 2926

Product Description

These instructions explain how to field install or

replace the Laboratory Controller Module LCM.

This LCM-OAVS VAV Room Pressurization with HW

Reheat and Two Fast-acting Venturi Air Valves —

One Exhaust, One Supply features VAV control of a

laboratory room with one supply duct, one exhaust

duct, and up to six Fume Hoods. It uses fast-acting

electronic actuators (shipped separately) to control

the supply and exhaust.

The LCM can operate stand-alone, with a field

panel, or as part of a network.

Product Numbers

See the

Venturi Air Valve for Critical Environments

Technical Specification Sheet

(149-425) or

Configuration and Sizing

in the Critical Environments

section of InfoLink.

LCM-OAVS with HW Reheat and Two

Venturi Air Valves — One Exhaust, One

Supply Applications: 2920 (RTS) 2926

(BTU)

This controller requires Offboard Air

Module(s) (ordered and shipped

separately

550-767CN

Offboard Air Module – two required,

order separately

550-819B

NOTE: 550-767CN is designed to use Siemens Building

Technologies fast-acting LA546 (546-series Lab

Electronic Actuator(s) – order and ship separately)

Summary of content (8 pages)

PAGE 1
Installation Instructions Document No. 550-166 October 26, 2016 LCM-OAVS Room Pressurization with Two Fast Acting Venturi Air Valves (One Exhaust, One Supply) and HW Reheat Generic Controller I/O Layout. See Wiring Diagram for application specific details.
PAGE 2
Document No. 550-166 Installation Instructions October 26, 2016 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.  Supply power to the unit is OFF.  Any application specific hardware or devices installed.
PAGE 3
Document No. 550-166 Installation Instructions October 26, 2016 6. If the controller requires Offboard Air Modules, install them now following the appropriate Installation Instructions (see Product Numbers). 7. Connect the point wiring (see Wiring Diagrams). 9. Plug the room temperature sensor cable into the RTS port. 10. Connect the power trunk. DO NOT apply power to the controller without first consulting the specialist.
PAGE 4
Document No. 550-166 Installation Instructions October 26, 2016 Wiring Diagrams CAUTION 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. Offboard Air Module Wiring. CAUTION 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.
PAGE 5
Document No. 550-166 Installation Instructions October 26, 2016 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. 24 Vac Modulating Control.
PAGE 6
Document No. 550-166 Installation Instructions October 26, 2016 BACnet LCM-OAVS with Hot Water Reheat and Two Venturi Air Valves (One Exhaust, One Supply) -- Application 2920 Wiring Diagram. Page 6 of 8 Siemens Industry, Inc.
PAGE 7
Document No. 550-166 Installation Instructions October 26, 2016 BACnet LCM-OAVS with Hot Water Reheat, BTU Compensation, Two Venturi Air Valves (One Exhaust, One Supply) -Application 2926 Wiring Diagram. Siemens Industry, Inc.
PAGE 8
Document No. 550-166 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.