Operating Instructions

Chapter 2 – Applications
Application 2928 LCM-OAVS Venturi Slow Speed, with BTU Compensation
13
Siemens Industry, Inc.
Owner's Manual
125-5083
06/30/2015
This application uses 0-10V output signals for control of slow Venturi Air Valves for
both supply and general exhaust.
The discharge temperature setpoint is reset in sequence with the VAV flow to control
the room temperature using a BTU Compensation algorithm. The discharge
temperature is then controlled using the reheat coil.
The LCM controls pressure, ventilation, and temperature. When these functions
conflict, the priorities are:
1. Pressurization
2. Ventilation (supply minimum may be overridden to maintain negative
pressurization)
3. Temperature
Application 2928 Control Drawing.