Operating Instructions

Siemens Building Technologies, Inc. 1-1
1
Introduction
The Controller
The Siemens Building Technologies, Inc. Laboratory Room Controller (LRC) applies Direct
Digital Control (DDC) technology to laboratory HVAC systems. Its primary functions are the
following:
• pressurizing the laboratory (using volumetric tracking) so air moves into the
laboratory from surrounding spaces
• delivering enough ventilation to the room to dilute air contaminants
• maintaining the desired air temperature in the room
The LRC is specifically designed to perform these functions in laboratories with VAV fume
hoods. The components are selected and arranged to combine the speed, stability, and
accuracy in airflow control that the VAV laboratory demands.
The LRC is equipped with ventilation and pressurization alarms that are designed to fit into a
safety program. When the ventilation system fails to function properly, the LRC can detect
and indicate the alarm condition throughout the facility. The LRC can activate alarm devices
in or near the room and broadcast that information through the Building Automation System
(BAS) to the people designated to respond to the problem.
As part of a networked BAS, the LRC makes it possible for the maintenance staff to monitor,
troubleshoot and adjust laboratory HVAC operation remotely. The BAS can collect and
process data from the LRC to generate longer-term records of laboratory operation. These
records can be used as part of a building quality assurance program. Reports can also be
tailored to serve as safety records, or for use in energy accounting.
To help you make the best use of your energy budget; the LRC has features that support
reducing the ventilation rate during periods in which the laboratory is unoccupied.