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Installation Instructions 

Document No. 570-114 

October 26, 2016 

 

LCM-OAVS Room Pressurization with, 
Two Venturi Air Valves (One Exhaust, 
One Supply) and HW Reheat (including 
BTU Compensation) 

 

 

Item No. 570-114 Rev. CA

 

Page 1 of 8 

 

Generic Controller I/O Layout. See 

Wiring Diagram

 for application specific details. 

 

Control Applications 

6750, 6756 

Product Description 

The Siemens Venturi Air Valve is a pre-packaged, 

easy to install airflow measurement and control 

solution. It provides stable and precise airflow 

control of room supply, room general exhaust or 

fume hood exhaust. 
These instructions explain how to field install or 

replace the BACnet Laboratory Controller Module 

LCM. 
This BACnet LCM-OAVS VAV Room Pressurization 

Controller 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 Venturi air valves.  

This controller is built on a BACnet Programmable 

TEC (PTEC) platform that supports up to two 

Offboard AVS signals; however, Onboard AVS 

transducers are not supported. Offboard Air 

Module(s) (OAM) house AVS transducers and send 

signals to the AVS input(s) on the LCM OAVS 

board. 
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. 

 

BACnet LCM-OAVS with HW Reheat 

and Two Venturi Air Valves — One 

Exhaust, One Supply Applications 6750 

(RTS) 6756 (BTU) 
This controller requires Offboard Air 

Module(s) (ordered and shipped 

separately 

570-804PA 

Summary of Contents for LCM-OAVS 570-804PA

Page 1: ...ves 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 Venturi air valves This controller is built on a BACnet Programmable TEC PTEC platform that supports up to two Offboard AVS signals however Onboard AVS transducers are not su...

Page 2: ...nt Small flat blade screwdriver 3 8 inch open end wrench Needle nose pliers 1 4 inch poly tubing Prerequisites Wiring conforms to NEC and local codes and regulations For further information see the Wiring Guidelines Manual 125 3002 Optional Room temperature sensor installed 24 Vac Class 2 power available Supply power to the unit is OFF Any application specific hardware or devices installed NOTE A ...

Page 3: ... use one trunk for the FFM and FHC and another trunk for the actuator s and LCM 8 For each Fast Acting Lab Electronic Actuator verify that the switches are set as shown in Figure Switch Settings for the Fast Acting Lab Electronic Actuator Supply Exhaust Switch Settings for the Fast Acting Lab Electronic Actuator CAUTION This actuator requires a maximum of 20 VA 24 Vac source DO NOT connect any oth...

Page 4: ...sensor is used Failure to follow wiring precautions will result in equipment damage Wiring for AI with a 4 to 20 mA Sensor 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 NOTE If the voltage current switch is set to current and a 4 to 20 mA sensor is connected to an AI then speci...

Page 5: ...O3 16 Common jumper NOTE The controller s DOs control 24 Vac loads only The maximum rating is 12 VA for each DO An external interposing relay is required for any of the following VA requirements higher than the maximum 110 or 220 Vac requirements DC power requirements Separate transformers used to power the load for example part number 540 147 Terminal Equipment Controller Relay Module NOTE Thermi...

Page 6: ...nt No 570 114 Installation Instructions October 26 2016 Page 6 of 8 Siemens Industry Inc BACnet LCM OAVS with Hot Water Reheat and Two Venturi Air Valves One Exhaust One Supply Application 6750 Wiring Diagram ...

Page 7: ...70 114 Installation Instructions October 26 2016 Siemens Industry Inc Page 7 of 8 BACnet LCM OAVS with Hot Water Reheat BTU Compensation Two Venturi Air Valves One Exhaust One Supply Application 6756 Wiring Diagram ...

Page 8: ...urity management and physical security systems The security functions on these products solutions and services are important components of a comprehensive security concept Drafting implementing and managing a comprehensive and up to date security concept customized to individual needs is nevertheless necessary and may result in additional plant or site specific preventive measures to ensure secure...

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