Fume Hood Monitor and Controller – User Guide 3 © 2016 CRITICAL ROOM CONTROL
Introduction
The CRC-FHM/C is a comprehensive, flexible, and easy to use fume hood monitor / controller.
Even though the CRC-FHM/C’s unique design allows for quick trouble-free set up, we suggest
reading this guide before use. This guide will help you take full advantage of the function and
performance of the FHM/C.
Functionality Overview
Both CRC-FHM (Fume Hood Monitor) and CRC-FHC (Fume Hood Controller) can monitor and
alarm the airflow of a fume hood using sash sensing, sidewall sensing, or constant volume
measurements. The CRC-FHC includes all of the functionality of the CRC-FHM, and has the added
ability to control the fume hood’s airflow with either face velocity / variable volume or constant
volume.
Feature Summary
• Immediate Valve Control™ (IVC) and Predictive Sash Valve Control™ (PSVC) adjusts
face velocity to the correct set point immediately after sash movement (less than 1
second).
• Clear indication of hood face velocity or air volume.
• Supports constant volume or variable volume hoods.
• One button "quick switch" to emergency override mode.
• Main screen commissioning info allows for quick and easy startup and PID tuning.
• Supports direct sidewall, vertical sash, horizontal sash and combination sash sensing.
• Optional minimum and maximum flow features.
• Can be automatically switched into "In Use" mode via occupancy sensor.
• Energy saving sequencing and control logic to put controller into "Standby" mode
when not in use.
• Optional sash and CFM alarms can be used to prompt user to lower sash in order to
increase energy savings without placing users at risk.
• Fully integrated BACnet MS/TP communications.
• Supports imperial and metric readouts.
• Full color LCD touch screen with LED backlight.
• Multiple user modes and set points.
• Proprietary control functionality for both constant volume and face velocity control
that provides industry leading speed of response.
• Can operate as a standalone device, part of a Critical Room Control complete space
solution, or integrate with Building Automation System.
Application
The CRC – FHM/C is designed to fit on all fume hood applications including:
1. Hospital: Pharmacies, Oncology, Laboratories
2. Laboratories: Wet Chemistry, Open Bench
3. Animal Research Laboratories
4. Bio-Containment Laboratories
5. Cleanrooms / Manufacturing