Critical Room Control CRC-FHM, CRC-FHC User Manual

Contents

Introduction ........................................................................................................................... 3

Primary Screens ..................................................................................................................... 4

Main Screen ............................................................................................................................. 4

Air Flow Alarm ......................................................................................................................... 5

Password Protection ................................................................................................................ 6

Mode Change .......................................................................................................................... 6

Emergency Override ................................................................................................................ 7

Commissioning Info Screen ..................................................................................................... 8

Administrative Screens .......................................................................................................... 9

Hood Setup Functions: ............................................................................................................ 9

General Configuration: ............................................................................................................ 9

Exhaust Input Setup ............................................................................................................... 10

Sash Sensing - Exhaust Input Setup .................................................................................. 10

Immediate Valve Control (IVC™) – Sash Sensing .............................................................. 11

Sidewall Sensing – Exhaust Input Setup ........................................................................... 12

Predictive Sash Valve Control (PSVC™) – Sidewall Sensing .............................................. 13

Constant Volume - General .............................................................................................. 14

Sash Setup ............................................................................................................................. 15

Vertical Sash – Sash Setup................................................................................................ 15

Combination Sash – Sash Setup ....................................................................................... 16

Set Point / Control Setup ....................................................................................................... 17

Min. Flow Feature ............................................................................................................ 17

Max. Flow Feature ........................................................................................................... 17

Alarm Setup ........................................................................................................................... 18

Sash Alarm - Sash Area ..................................................................................................... 18

CFM Alarm – Sash Area .................................................................................................... 18

Energy Saver Delay ........................................................................................................... 19

BACnet MS/TP ....................................................................................................................... 19

General Setup Screen (password, hood #, etc.) ..................................................................... 22

Hood Exhaust Summing ................................................................................................... 22

Decommission Mode ............................................................................................................. 22

Commissioning Task List – Sash Sensing ................................................................................ 23

Commissioning Task List – Sidewall Sensing .......................................................................... 24

Diagnostic Screen .................................................................................................................. 25

Wiring / Device Connection Overview .................................................................................. 26

Installation .......................................................................................................................... 27

Mounting / Installation .......................................................................................................... 27

Controller I/O......................................................................................................................... 30

Troubleshooting ................................................................................................................... 31

Display is not reading correct air volume or face velocity. .................................................... 31

Recalibrating Touch Screen ................................................................................................... 31

Limitation of Warranty and Liability ..................................................................................... 32

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

Primary Screens

Main Screen

The FHM / FHC’s “Main Screen” indicates the current mode, flow rate, and alarm status of the fume hood. Located in the upper quarter of the screen, the FHM/FHC displays current face velocity or hood airflow volume depending on the user defined control strategy. The monitor also displays current hood control mode, operating condition and associated graphic. The monitor includes the ability to override the control function and drive the hood to fail safe operation. Background color indicates Alarm status (Green indicates no alarm).

Background color indicates alarm status

(Green indicates no alarm)

Displays current Face Velocity or CFM

Indicates current hood operation mode

Easy to understand graphic indication of hood operation

Displays current condition of fume hood

Emergency Override Button – user can

instantly drive the fume hood's exhaust to

maximum flow

Hood 12b

Air Flow Alarm

When the current face velocity (FPM) or volumetric (CFM) reading goes outside of the alarm high and low parameters, the unit will go into alarm. The FHM/C can be configured with an audible alarm delay (nuisance delay). When an audible alarm delay is used, the "Hood Caution” screen with a yellow background will be displayed until the timer runs out and the unit goes into alarm. It is important to note that the FHM/C's face velocity and CFM alarm is ONLY active when in the “IN USE” mode. Face velocity and CFM alarms are not active while in the “STANDBY” or “Decommission” mode.

AUDI BLE ALARM MUTE

HOOD FLOW NORMAL

LOSS OF HOOD EXHAUST

No alarm / hood normal

Green background

Easy to read "Safe Flow" icon

LOSS OF HOOD EXHAUST

Displays current drop in flow rate

Caution Icon

Caution text

with instructions

to user

HOOD EXHAUST ALARM

Audible alarm sounds

Red background

Alarm icon

AUDIBLE ALARM DELAY EXPIRES

USER MUTES AUDIBLE ALARM

Alarm text with instructions

to user

Audible alarm icon / mute button

Muted audible alarm icon

All visual alarm

indications remain until air flow is restored

Password Protection

The CRC-FHM/FHC allows the user to change the password needed to access the administrative menu. If the password is set to blank (no characters entered), then users are not prompted to enter a password when accessing the administrative menu.

Factory default password for the administrative Menu is: 9876

Mode Change

User can select between two modes:

• IN USE

• STANDBY

User touches anywhere on screen to make MODE and ADMIN buttons appear

User selects change "Mode" button

Current Mode: In Use

Change Hood Mode

Please select hood’s m ode

IN USE STANDBY

Exit -No Changes

User selects "IN USE"

User selects "STANDBY"

Change Hood Mode screen appears

IN USE:

FHM (Monitor only) - Selecting IN USE will display the IN USE graphic and activate

alarms based on the IN USE face velocity or airflow volume set point

FHC (Monitor and Control) – Selecting IN USE will display IN USE graphics and activate the programmed IN USE face velocity or airflow volume set point. The onboard control loop will make volume adjustments to the fume hood airflow to attain the IN USE set point and activate alarms based on IN USE set point.

STANDBY:

FHM (Monitor only) - Selecting STANDBY will display the STANDBY graphic and

deactivate alarms.

FHC (Monitor and Control) – Selecting STANDBY will display STANDBY graphics and activate the programmed STANDBY face velocity or airflow volume set point. The onboard control loop will make volume adjustments to the fume hood airflow to attain the STANDBY set point and deactivate alarms.

Emergency Override

The CRC-FHM/FHC emergency override offers the ability to command the hood exhaust to maximum flow from any of the main screens. When the unit is put into Emergency Override, the screen changes to red background and an audible alarm will sound. The control loop output (CRCFHC only) will automatically drive the exhaust valve fully open.

User selects "EMERGENCY OVERRIDE" from any main screen

and the unit will switch to

EMERGENCY OVERRIDE Mode

The CRC_FHM/C will return to "In Use" mode when user selects "CANCEL OVERRIDE"

Commissioning Info Screen

The commissioning info screen is a feature of the CRC-FHM/C that displays key information on the front screen to aid in the setup / startup of the fume hood. It also allows the commissioning agent to change the P and I gains values directly from the front screen.

This feature can be turned on / off from the Exhaust Setup Screen.

Commissioning information values include:

• Current Analog Input 1-3 values (percentage of 0-10V signal)

• Current PID output / valve position (percentage 0-10v signal on AO 0)

• Current "WC signal from CRC-CLV

• Current CFM being exhaust by this hood

• Current total exhaust of all hoods (see hood summing feature) – “T CFM CAS”

• Current Air flow without display dead band and influence from min / max feature

• Total Sash Area - “Tot Area” (applicable for sash sensing only)

• Vertical Sash Area (applicable for sash sensing only)

• Horizontal Sash Area (applicable for sash sensing only)

• Voltage offset (see zeroing valve)

• FPM Offset (applicable for sidewall sensing only)

FPM Offset button allows

balancer to easily fine tune the FPM signal coming from

our sidewall sensor

Set Stop Position is used only

with sidewall sensing and PSVC. See sidewall setup for more

information.

Administrative Screens

The "Administration Menu" lists all of the functionality that a user is able to configure on the CRCFHM/FHC. The administrative menu is accessed from the main menu. The administration menu requires the user to enter a password (Default Password: 9876) to gain access.

Hood Setup Functions:

• Exhaust Setup: used to configure the airflow device and hood control strategy

• Set Point / Control: used to configure IN USE and STANDBY set points, control

Proportional and Integral loop parameters, display dead band, min. and max. flow

• Hood/Sash Setup: used to set up fume hood sash sensor including Vertical,

Horizontal and combination vertical/horizontal sashes

• Alarm Setup: Used to set IN USE alarm range of face velocity or CFM, audible alarm

delay time, sash alarm and energy saver alarm delay

• Network Setup: used to set up BACnet communication parameters.

General Configuration:

• Password Set: Used to configure the administrative password and

setup screen timeout

• I/O Diagnostic: Visual indication and testing of controller inputs and outputs

• Factory Reset: Restores original factory settings

• Restart: Restarts the controller to access the touch screen calibration

Exhaust Input Setup

The "Exhaust Input Setup" screen contains the parameters to configure the fume hood's flow rate that is displayed on the main screen. The three types of flow sensing that can be selected are:

• Sash Sensing – which uses a sash sensor to translate air volume into face velocity

• Sidewall Sensing – which uses a velocity sensor that directly measures face velocity

• Constant Volume – which measures the volume of air that is being exhausted from

the fume hood

Sash Sensing - Exhaust Input Setup

Sash sensing calculates face velocity of the air traveling through the open sash area by using a sash sensor to translate the current open area of the fume hood's sash relative to the amount of air that the hood is currently exhausting. To calculate face velocity using this method, the CRCFHM/C must be connected to both a sash sensor and a CRC- Closed Loop Valve.

Select "Face Veloc. Sash"

Select "FPM" or "MPS"

Reduces or eliminates small fluctuations in face velocity display

Set DP high value for valve (usually 2" WC)

Show / hide commissioning info on front screen

Gives access to screen to populate, view and reset the hood exhaust valve’s air flow table

Set DP low value for valve (usually 0" WC)

Set K Factor for valve

To “Zero” the exhaust valve’s voltage signal, first shunt the high and low port on the valve’s transducer, then press “Zero Valve” to set the voltage input that corresponds with zero air flow.

Immediate Valve Control (IVC™) – Sash Sensing

Unlike conventional hood controllers that merely rely on a PI loop to slowly react to changes in sash position, CRC fume hood controller’s Immediate Valve Control (IVC)™ technology continually measures sash position and current CFM at a rate of 5 times per second to immediately react to a change in sash position and instantly drive our valve to the correct valve position to maintain face velocity.

CRC’s IVC™ algorithms utilize an air flow table that is created with an automated process that takes less than 20 seconds during the commissioning of the fume hood.

To create this table, simply click on the “Valve Table” button on the Exhaust Input Setup screen to show the “Valve Air Flow Table” screen.

To setup / enable IVC, first confirm that the exhaust flow is running at the lowest static pressure to be used during operation, then press the “Pop Table” button to auto populate the flow values of the hood’s exhaust valve. After pressing this button, the controller automatically records the valve’s flow rate for different key actuator positions. This process takes approximately 20 seconds to complete. When finished, the table status should read “NO ISSUE”.

To disable IVC, click the “Reset Table” button.

Please note the following:

• Changing the valve’s “K Factor” will NOT effect the table. Once the table is created – the

table values will automatically adjust to changes in K Factor.

• For optimized performance, the exhaust flow should be running at the lowest static

pressure to be used during operation of the hood before pressing the “Pop Table”

button.

• If “Zero Valve” status is displayed, then go through the Valve Zeroing process outlined

on previous page before repopulating the valve’s airflow table.

Click “Valve Table”

Click “Pop Table” to auto populate the valve’s air flow table.

Table Status:

- NO ISSUE

- NOT SET UP

- SENSOR ERR

- ZERO VALVE

“Reset Table” will disable IVC features

Sidewall Sensing – Exhaust Input Setup

Sidewall sensing calculates face velocity of the open sash area by using CRC's direct velocity measuring sensor (CRC-SWS) that is typically installed on the sidewall of the fume hood. This methodology has the option to connect to a CRC Valve (CRC-CLV) to monitor and sum the volume of air that is being exhausted for the room's overall exhaust volume.

The following is the simple three step process to commission the sidewall sensor. Make sure the Commissioning Info option is set to "Show" on the Exhaust Input Setup Screen.

Reduces or eliminates small fluctuations in face velocity display

Set DP high value for valve (usually 2" WC)

Show / hide commissioning info on front screen

Set DP low value for valve (usually 0" WC)

Set K Factor for valve

STEP 1: Open sash to stop position and wait until hood's flow is stable at set point

STEP 2: Have air balancer read the actual face velocity average from the sash opening – then press "Set FPM" button

STEP 3: Enter the difference between actual face velocity that the air balancer reads and what is shown on the screen – then press "ENTER / SAVE" button

Select "Face Veloc. Sidewall"

Select "FPM" or "MPS"

Use / Disable PSVC

Predictive Sash Valve Control (PSVC™) – Sidewall Sensing

Moving the sash from fully closed to fully open is the most likely time a fume hood can loose containment. When opening a fume hood’s sash, the hood needs to respond immediately to increase its exhaust so that the face velocity is maintained. The challenge with conventional hood controllers using sidewall sensors is that they rely on dated hotwire technology to measure airflow, which is relatively slow to sense and react to changes in air velocity. These hood controllers also use conventional PI loops to slowly react to the lack of face velocity.

CRC’s fume hood controller and sidewall sensor does not use hotwire technology. Its sensor calculates a change in air velocity within 1/5 of a second. Its PSMC algorithm can also detect when a user is opening the sash and, before the user is able to raise the sash to stop position, it will increase its exhaust rate to maintain proper face velocity. This technology allows CRC fume hood controllers to control to set point in under 1 second (<800ms).

To configure PSVC™, simply follow these steps:

1. Enable “PSVC” on the Exhaust Input Setup screen.

2. Turn on commissioning info.

3. Open sash to stop position.

4. Wait until hood is maintaining correct face velocity.

5. Press the “Set Stop Position” button.

To configure PSVC™ - Open sash to stop position, wait until hood is maintaining correct face velocity, then press the “Set Stop Position” button.

Constant Volume - General

Constant Volume Sensing uses direct feedback from the CRC-CLV to monitor and sum the volume of air that is being exhausted. This value is displayed on the front screen and can be communicated to the rooms control system to accurately calculate total exhaust.

Reduces or eliminates small fluctuations in air volume

Set DP high value for valve (usually 2" WC)

Show / hide commissioning info on front screen

Set DP low value for valve (usually 0" WC)

Set K Factor for valve

Select "Constant Volume"

Select "cfm" or "l/p"

Sash Setup

The FHM/C supports vertical sash, horizontal sash, and combination sash fume hoods.

Please note that the FHM/C's Sash Setup screens / options are only used when deriving face velocity from sash position, a sash sensor is not needed for those fume hoods that are using constant volume or sidewall sensing methodologies to display / control air flow.

Vertical Sash – Sash Setup

The following screen contains the configuration options for using a vertical sash sensor. The same setup is used when the fume hood is equipped with just a horizontal sash.

Select "Vertical Sash"

Enter the total area in sqft. of the sash opening (width x height). Do not include bypass area.

Close the sash to its fully closed position and click the " Calib." Button – this will automatically enter the voltage from the sash sensor for the closed position

Enter the total area in sqft. for just the bypass area

Open sash to its fully open position and click the "Calib." Button – this will automatically enter the voltage from the sash sensor for the open position

Combination Sash – Sash Setup

The following screen contains the configuration options for a hood that has a horizontal sash integrated into the vertical sash.

Select "Combo Sash"

Open sash to its fully open position and click the "Calib." Button – this will automatically enter the voltage from

the sash sensor for the open position

Enter the total area in sqft. of the vertical sash opening (width x height). Do not include bypass area.

Fully close the sash and click the "Calib." Button – this will automatically enter the voltage for the closed position

Enter the total area in sqft. for just the bypass area

FIGURE 2: To set the Horizontal Start value open the vertical sash until the horizontal start plane is aligned with the upper portion of the vertical sash opening as shown here, then press the Start "Calib." Button.

FIGURE 1: The following illustrates the Horizontal

START and STOP position when the vertical sash is closed. Note that the horizontal sash (light blue) is

a sub component of the vertical sash (dark blue).

Fully open the Horizontal sash and click the "Calib." button.

Fully close the Horizontal sash and click the "Calib." button

Open the Vertical sash to the top of the Horizontal sash as indicated in FIGURE 2 below and click the "Calib." button

Open the Vertical sash so that the bottom of the Horizontal sash (stop) is at top of the Vertical sash opening and click

the "Calib." button

Enter the total sqft for open horizontal sash area

Set Point / Control Setup

Used to configure IN USE and STANDBY set points, control Proportional and Integral loop parameters, display dead band, minimum and maximum flow values.

Min. Flow Feature

Most hood manufacturers give a minimum CFM value for each hood model which is required to safely operate that specific hood. The CRC-FHM/C will automatically control the hood exhaust valve so that the minimum CFM entered is maintained. When configured to display face velocity on the front screen, the CRC-FHM/C will display "Minimum Flow 100+ FPM" if controlling the exhaust valve to the minimum CFM causes the face velocity to exceed set point (i.e. controlling hood to maintain 300 cfm when the sash is fully closed).

Please note that this feature can only be used when the CRC-FHC is monitoring CFM.

Max. Flow Feature

The "Max. Flow" feature allows the CRC-FHC to be configured to not exceed a certain CFM (usually dictated by hood manufacturer).

Please note that this feature only affects the PI control loop, and can only be used when the CRCFHC is monitoring CFM.

Control Deadband – used to stop small oscillations to control loop

Direct or reverse acting PI loop

Set maximum CFM for hood (specified by hood manufacturer).

"In Use" and "Standby" set points

P and I Gain values control the speed of

control loop ("P Gain" value should

always be greater than "I Gain" values")

Set minimum CFM for hood (specified by hood manufacturer). CRC-FHC will not allow control loop to drop air flow below this value

Alarm Setup

This screen contains the parameters to set face velocity or volume alarm when monitor is in the “IN USE” mode. This screen also contains the parameters used to configure the audible alarm delay time, sash alarm and energy saver alarm delay.

Sash Alarm - Sash Area

If the total sash area is greater than the value entered for the "Area Alarm", for a longer period of time than the time set in the "Delay (Sec)." field, the sash visual and audible alarm will be triggered. The audible alarm can be muted by the user by clicking on the "Sash Alarm" button.

This feature can only be used when connected to a sash sensor.

CFM Alarm – Sash Area

Similar to the Area Alarm, the CFM Alarm will be triggered if the current CFM is greater than the value entered for the "CFM Alarm", for longer period of time than the time set in the "Delay (Sec)." field. The audible alarm can be muted by the user by clicking on the "Sash Alarm" button.

The CFM Alarm feature is used when the CRC-FHM/C is using a sidewall sensor to monitor face velocity instead of a sash sensor.

Alarm range over and under set point. Visual and audible alarm will occur when flow exceeds "In Use" set point + (plus) High value, or falls below "In Use"

set point – (minus) Low value.

Audible alarm / nuisance delay

A sash area alarm will be triggered if total sash area is greater than this value (see "Sash Alarm" below)

The delay before the FHM/C is put in standby mode (see "Energy Saver Mode" on next page)

A sash area alarm will be triggered if total CFM area is

greater than this value (see "CFM Alarm" below)

Sash alarm delay – used for both Sash Area Alarm and CFM Alarm

Energy Saver Delay

This feature will automatically change the mode from “In Use” to “Standby” after the number of minutes entered into the “Set Energy Saver Delay” has expired. This feature can be used with or without an occupancy sensor. This feature can also be turned off by selecting “Off” in the Set Energy Saver Delay value on the Alarm Setup Screen. Thirty (30) seconds before the unit is automatically switched to “Standby” Mode, a warning will appear on the screen and a beep will sound every second until mode is changed to standby.

With Occupancy Sensor: When an occupancy sensor is wired into DI1, the unit will not start the Energy Saver Delay countdown until the occupancy sensor opens the contact to DI1 (unoccupied). After the countdown is complete - the unit will switch to Standby Mode.

Without Occupancy Sensor: If no occupancy sensor is wired to DI1, then the unit will start the Energy Saver Delay countdown as soon as it is put into the “In Use” mode. When the countdown is completed, the unit will automatically change to “Standby” mode.

BACnet MS/TP

For BACnet communications over a three wire RS 485 trunk, enter the appropriate network parameters for this device:

• Baud Rates: 9600, 19,200, 38,400, 57,600, 76,800, 115,200

• MAC Address: 0 - 254

• Instance ID: 1 - 4,194,304

Debug Information: If selected, this feature will display network traffic and communication information on the main screen.

Configure as a Token Passing Device or as a Slave Device: If the device's MAC Address is set between 0 and 127, it is configured as a token passing device – which enables "Dynamic Binding", response to "Who Is" requests, and participation in token passing.

Setting this device's Slave Address between 126 and 254 will configure this device as a dedicated slave device which will greatly reduce network overhead / traffic, but requires the device NOT to support "Dynamic Binding", respond to "Who Is" requests, or participate in token passing.

Physical Network

Connection to the RS485 requires a three wire bus consisting of a positive, negative, and ground / common wire. Typically, devices on a RS485 network are a series circuit or “Daisy-Chained” together.

An MS/TP EIA-485 network should use a three wire shielded twisted pair cable with characteristic impedance between 100 and 130 ohms. Distributed capacitance between conductors should be less than 100pf per meter. Foil and braided shields are acceptable. The maximum recommended length of an MS/TP segment is 4,000 feet with AWG 18. The maximum number of nodes per segment is 32. An MS/TP EIA-485 network should have no T connections. A termination of 20ohms +-5% should be connected at each of the two ends of the segment medium. No other terminations should be used at intermediate nodes.

BACnet Trouble Shooting / Debug Screen

The following section gives a brief overview of the network "Debug Information" that can be selected to show on the front screen of the CRC-RM.

• Network Traffic: This number will increase if there is any network traffic regardless if

this unit's BAUD rate is correct. If this number is NOT increasing, then there is no traffic on the network or the unit is not connected to the network.

• M In (Messages In): This number will increase when this unit receives a message

addressed specifically to it.

• S ACK (Simple Acknowledgement): This number increases as this unit responds to

requests to WRITE points.

• C ACK (Complex Acknowledgement): This number increases as this unit responds to

requests to READ points.

• M Sent (Messages Sent): This number increases with when this unit sends out a

message (including passing a token).

• Who Is: This number will increase when this unit receives a "who is" request that is

broadcasted to every device on its bus.

• Who Is (R) (Ranged Who Is): This number will increase when this unit receives a

"who is" request for a specific range of Instance IDs.

• I Am: This number increases when this unit responds to a Who Is request.

• Token: This number increases with when this unit receives and passes a token.

• Framing Errors or Break Errors: If this

number is increasing, then it usually means that there is noise on the trunk

BACnet Point Map

Fume Hood Controller

Read / Write

Network

changes saved

in EEPROM

Notes

Analog in 0

Read Only No

Percentage

Analog in 1 Read Only No

Percentage

Analog in 2

Read Only No

Percentage

3 Analog in 3

Read Only

Percentage

In Use Set Point

Read / Write

YES

Current Air Flow / Velocity

Read Only

Standby Set Point Read / Write YES

AV 7 Current CFM Read Only No

CFM

AV 8 Current Sash Area Read Only No

Inches

AV 9 Mod e Read / Write No

0 = In Use, 1 = Standby, 2 = Emergency Overide, 3 = Dec omm issio n

AV 10

Condition Read Only No

0 = Hood Normal, 1 = Caution, 2 = Alarm

Alarm High

Read / Write Yes

12 Al arm Low

Read / Write Yes

AV 13

Pass Through CFM IN Read Only No

Summed CFM from other hoods

14 Current Sash Open Percent

Read Only No

AV 15 K Factor

Read / Write Yes

AV 16 Valve Sensor High Read / Write

Yes

Inches WC

AV 17 Valve Sensor Low Read / Write Yes

Inches WC

AV 18 P Gain Read / Write Yes AV 19 I Gain Re ad / Write Yes AV 20 Min Flow Read / Write Yes AV 21 Max Fl ow Read / Wri te Yes AV 22 Sash Alarm Status Read Only No

0= no alarm, 1 = alarm, 2 = alarm mute

AV 23 Control Output (PID Output) Read Only No

Percentage

AV 24 Curre nt "WC Read Only No

Inches WC

AV 25 Total CFM Out Read Only No

Summed CFM from this and other hoods

AV 26 Sash Open SqFt - (CRC-SVS usage onl y) Read Only No

Derives value from face velocity and volume

AV 27 Sash Open % - (CRC-SVS usage only) Read Only No

Derives value from face velocity and volume

BV 0 Digital Input 1 Read No BV 1 Digital Input 2 Read No BV 2 Digital Input 3 Read No BV 3 Digital Input 4 Read No BV 4 Sash Area Al arm - No delay Read No

0 = no alarm, 255 (FF) = alarm

BV 5 Audible Alarm Read / Write No

0 = no alarm, 255 (FF) = alarm - Write 0 to mute

General Setup Screen (password, hood #, etc.)

Used to configure the administrative password and setup screen timeout.

Hood Exhaust Summing

The sash summing feature gives the ability to sum up the total volume of air being exhausted by fume hoods, and is used by connecting AO 4 of the previous hood into AI 4 of the next hood. Each of the hoods will sum up the CFM being exhausted by translating a 0-10v signal into a 0-2000 CFM value, add its own current exhaust volume, then send the total CFMs being exhausted to the next hood. This value is then used by the room control to calculate the remaining general exhaust that is needed for the room to maintain the room’s volumetric offset.

Decommission Mode

Available only from the password protected Administrative Menu, the “Decommission” Mode allows administrators to decommission the fume hood for repairs. When the unit is placed in Decommission Mode, the screens icon and background changes to grey.

The current flow rate will still be displayed on the screen but the flow alarms will not be active. The FHC will also modulate its analog output so that the exhaust valve fully closes. At any time, a user can select “Emergency Override” or change the mode back into “In Use”.

NOTE: The FHM / FHC will still use the minimum flow rate for its flow rate display even while in Decommission Mode.

Password to Admin menu (leave blank for no password)

Enter Hood # to be displayed at the top of the front screen

Set the timeout value for the front screen

Show / Hide the “Emergency Override” button on the front screen

Enter the number of previous hoods connected to AI4 to sum their current exhaust levels (see Hood Exhaust Summing) below.

Commissioning Task List – Sash Sensing

Task

Dependent / preceding tasks

Typical task owner

Install / wire FHM/C controller box Electrician

Install / wire FHM/C LCD screen

Electrician

Install sas h sensor and wire to FHM/C controller

Electrician

Wire exhaust valve's actuator and transducer to FHM/C controller

Electrician

Confirm correct wiring via FHM/C's I/O Diagnostic Screen (i.e. stroke valve and confirm air flow on AI1 - [valve], raise / lower sash to confirm signal on AI2 - [sash sensor])

1-4

Electrician

Turn on / operate hood exhaust at lower end of anticipated static pressure

1-5

Commissioning agent / air balancer

FHM/C's Exhaust Setup Screen - enter correct values

Commissioning agent / air balancer

FHM/C's Sash Setup Screen - enter correct values

1-3

Commissioning agent / air balancer

FHM/C's Set Point / Control Screen enter correc t values

Commissioning agent / air balancer

Adjust K Factor on FHM/C's Exhaust Setup Screen (if needed by balanc er)

4, 6, 7

Commissioning agent / air balancer

Populate valve's air flow table on FHM/C's

Exhaust Setup Screen

4, 6, 7

Commissioning agent / air balancer

FHM/C's Alarm Setup Scre en - enter correct values

Commissioning agent / air balancer

FHM/C's Network Setup Screen - enter correct values (optional)

Commissioning agent / air balancer

FHM/C's General Setup Screen - enter correct values (optional)

Commissioning agent / air balancer

Commissioning Task List – Sidewall Sensing

Task

Dependent / preceding tasks

Typical task owner

Install / wire FHM/C controller box

Electrician

Install / wire FHM/C LCD screen

Electrician

Install sidewall sensor and wire to FHM/C controller

Electrician

Wire exhaust valve's actuator and transducer to FHM/C controller

Electrician

Confirm correct wiring via FHM/C's I/O Diagnostic Screen (i.e. stroke valve and confirm air flow from AI1 - [valve] and AI2 [sidewall sensor])

1-4

Electrician

Turn on / operate hood exhaust at lower end of anticipated static pressure

Commissioning agent / air balancer

FHM/C's

Exhaust Setup Screen - enter

correct values

Commissioning agent / air balancer

FHM/C's

Set Point / Control Screen -

enter correc t values

Commissioning agent / air balancer

Adjust K Factor on FHM/C's Exhaust Setup Screen (

if needed by balancer)

4, 6

Commissioning agent / air balancer

Adjust FPM readout from commis sioning screen (

if needed by balancer)

3, 8

Commissioning agent / air balancer

Set correc t valve position for needed airflow at sas h stop position

8, 9

Commissioning agent / air balancer

FHM/C's Alarm Setup Screen

- enter

correct values

Commissioning agent / air balancer

FHM/C's

Network Setup Screen - enter

correct values (optional)

Commissioning agent / air balancer

FHM/C's General Setup Screen - enter correct values (optional)

Commissioning agent / air balancer

Diagnostic Screen

The diagnostic screen allows the installer to easily troubleshoot connections to the CRC-FHM / FHC device. This screen visually shows the incoming signal for all analog and digital inputs, and allows the user to set individual Analog outputs or relays. The diagnostic screen also displays total controller run time. This utility screen bypasses control functions that influence the unit’s I/Os (i.e. PID signal output will not be functional).

Run Time

Run time displays the total time that the unit has been powered in HOURS: MINUTES:SECONDS:MILLISECONDS - Run time resets on power loss.

Analog Input

Displays associated Analog In (AIN1 thru 4) in bar form based on physical jumper inputs. IMPORTANT NOTE: our unit reads the full range of a mA signal – so receiving 10mA for a 4-20mA signal will result in reading of 50%.

Analog Output

Move the slider(s) up or down to vary the signal output. The value (in percentage of total signal output will be displayed at the bottom of the slider in red.

Digital Input

Indicates the status of Digital Inputs (DI-1 thru 4).

Digital Output

User can open or close a relay by touching any of the Digital Output buttons.

Wiring / Device Connection Overview

CRC-FHM

Controller

CRC-FHM/C

LCD Screen

Vertical Sash

Sensor

DPT on

CRC - CLV

Exhaust Control

(damper

, VFD, etc)

Horizontal

Sash Sensor

Occupancy

Sensor

CFM Sum to

BAS

BACnet (

RS485)

24VAC

Sash Sensing

REQUIRED FOR CONTROL

OPTIONAL

REQUIRED

CRC-FHM

Controller

CRC

-FHM/C

LCD Screen

Sidewall Sensor

(CRC SVS)

DPT on

CRC - CLV

Exhaust Control

(damper

, VFD, etc)

Occupancy

Sensor

CFM Sum to

BAS

BACnet (

RS485)

24VAC

Sidewall Sensing

CRC-FHM/C

Controller

CRC-FHM/C

LCD Screen

DPT on

CRC -

CLV

Exhaust Control

(damper, VFD, etc)

Occupancy

Sensor

CFM Sum to

BAS

BACnet (

RS485)

24VAC

Constant Volume Sensing

Installation

To simplify installation and to protect the LCD during construction activities, the CRC-FHM/FHC 'rough in' components are packaged separately from the LCD screen

Parts Included

• (1) CRC-FHM (FHC) - LCD w/Faceplate

• (1) CRC-FHM (FHC) - Control Unit (CRC-FHM/CONT)

• (1) CRC-MB Room Monitor Mounting Bracket

• (1) CRC-RJ45 Cable

Installer Supplied Parts (Not Included)

• (1) Single gang electrical box (LCD mounting pillar of fume hood)

• Power (18 AWG recommended)

• Signal Wire (22AWG recommended)

Optional Equipment

• (1) CRC-VSS Vertical Sash Sensor

• (1) CRC-HSS Horizontal Sash Sensor

• (1) CRC-SVS Sidewall Velocity Sensor

• (1) CRC-OCC Occupancy Sensor

• (1) CRC-CLV Closed Loop Valve

Rough-in Work

Typical rough in work consists of the following:

• Mount 1 single gang electrical box for the LCD screen on fume hood pillar.

• Mount controller enclosure (8" x 8" x 4").

*Must be mounted less than 20' from LCD screen.

• Run power (24VAC) 18AWG to controller enclosure.

• Install Sidewall Velocity Sensor, Vertical Sash Sensor, Horizontal Sash Sensor or

combination Vertical/Horizontal Sash Sensor.

• Run RJ45 cable from controller enclosure to single gang electrical box for LCD screen.

• Run additional wires as needed (network, signal integration to other devices, etc.).

Installation Notes

• Power to Fume Hood Monitors/Controllers should be isolated.

• Monitors/Controllers should have dedicated circuit.

• 22 ga.-stranded wire is preferred for installation.

• Do not run wiring near electrical interference.

• Spare wires and/or shield should be wrapped / insulated to eliminate contact with

circuits.

• Do not share common supply power and I/O between different manufacturers.

Mounting / Installation

The CRC-FHM/FHC is a two-part system designed to reduce installation costs and allow for surface mounting of LCD monitor. The two components to be installed are the monitor and the controller (CRC-FHM/FHC and CRC-FHM/CONT).

Mounting of the Fume Hood Monitor (CRC-FHM/FHC)

The CRC-FHM/FHC and mounting bracket is designed to be mounted directly to the fume hood pillar or a standard electrical box. The electrical box should be mounted flush relative to the face of the fume hood pillar. The mounting bracket (MB) should be attached to the electrical box. The monitor (FHM/FHC) LCD enclosure is then slid across the mounting bracket and fastened from the side.

Mounting of Fume Hood Controller (CRC-FHC/CONT)

• The CRC-FHM(FHC)/CONT is designed to be mounted remote from monitor (typically

above the ceiling or on top of hood).

• The CRC-FHM(FHC)/CONT is powered by 24VAC.

• Control wiring to exhaust valves, variable frequency drives, dampers etc. is connected to

the controller.

• Control wiring from vertical/horizontal/combo sash sensors, occupancy sensors etc are

connected to the controller. The CRC-FHM(FHC)/CONT will have a single RJ45 cable (supplied with unit) run to the CRC-FHM/FHC.

Mounting of Vertical (VSS) and Horizontal (HSS) Sash Sensors

Vertical Sash Sensor (CRC-VSS): The CRC-VSS is designed to be attached to the vertical rising fume

hood sash or counter weight cable. The cable should be aligned within 5° of perpendicular when cable is at full extension. Make sure the sash cable is clear from any obstructions. The Vertical Sash sensor sends voltage signal to fume hood monitor/controller.

Horizontal Sash Sensor (CRC-HSS): The Horizontal Sash Sensor is attached directly to the horizontal moving panes on the sash. Locate sensor bars near the top of the sash panel. As the sashes overlap the magnetic switch assembly measures resistance. Wiring of the HSS must allow full sash movement and must be clear from any moving parts. The Horizontal Sash sensor sends voltage signal to fume hood monitor/controller.

Combination Sash Sensor (CRC-CSS): The combination Sash Sensor requires both the Vertical and Horizontal Sash Sensors

Single gang electrical box (optional)

Mount screen in a portrait orientation with set screw to the left (mounting bracket included with kit)

Mounting of Sidewall Velocity Sensor (SVS)

Sidewall Velocity Sensor (CRC-SVS): The CRC-SVS is designed to be mounted on the interior

sidewall of the hood. One side of the sensor shall reference the inside of the hood and one side shall reference the room.

• The Sensor is to be mounted ¼ of the fume hood depth from the front of the sash

opening.

• The centerline of the sensor should be even with the bottom of the sash at the full

open position.

• The Sidewall Velocity Sensor should be mounted in a non-turbulent location.

Controller I/O

Relays and Digital Inputs:

Analog Inputs and Outputs:

* Must also be connected to either "5v" or "V+" – see sensor specs for details

Power and Communication:

RLY 1

RLY

RLY 2

RLY 3

RLY 4/3RLY 4

DIN

DIN 2

GND

DIN 3DIN 4

V+

GND

+ 10V

GND

+5V

PWR STAT

24V IN

G A+ B-

CRITICAL ROOM CONTROL

www

.criticalroom

.com

0123

AIN

AGND

AIN 2

AIN 1

AOUT 4

AOUT 3

AGND

AOUT 2

AOUT 1

RLY 1

RLY 2

RLY 3

RLY 3/4

RLY 4

DIN 1

DIN 2

GND

DIN 3

DIN 4

V+

GND

+10 V

GND

+5V



Alarm out to BAS (Closed =

Alarm)

Sash Alarm out to BAS (Closed = Alarm)

In Use / StandBy (Open = In Use)

Occupany Sensor (Closed = Occupied)

24V IN

G A+ B-

 RS

485 Network connection

 24

VAC

* Must also be connected to 5v, 10, or v+ - see sensor specs for power

Troubleshooting

Display is not reading correct air volume or face velocity.

Reset All Parameters to Factory Defaults: This will reset any parameter that may have been

incorrectly set or may be conflicting with the proper operation of this unit. Within the Admin Menu – select Factory Reset, press “Reset Controller” and exit screen.

Enter / Confirm Setup Parameters: Set the correct parameters within the setup screens for proper operation of the unit.

On the Set Point Setup Screen - set Min CFM to “0” and Max CFM to “2000”

• If CFM readout is incorrect – confirm the sensor high value, low value, and K Factor

value on the Exhaust Input Setup Screen. Adjust the K factor to increase / decrease the readout value.

• If using a sidewall sensor –turn on the commissioning screen, then enter the correct

face velocity that the air balancer is reading.

• If using a sash sensor – increase or decrease the K factor on the Exhaust Input Setup

Screen so that the face velocity equals the value read by the air balancer.

Recalibrating Touch Screen

Sometimes when installing the unit, the installer will touch the screen on initial power up which may cause the screen's touch calibration to misalign. If the touch sensor does not register the correct position of the area being touched (i.e. unit beeps when touching a button, but the button does not seem to act as if it were being pressed), the user must recalibrate the screen.

Please use the following steps to recalibrate touch screen:

• Power cycle the controller (remove power then power up)

• Press anywhere on the Startup Screen before the text "Initializing Controller – Please

Wait" appears.

Follow the prompts to touch the screen in different areas. - The controller will then restart itself with the new touch calibration - no further steps are needed.

General Steps to Solve Connectivity/Operational Issues

If you are having problems with the controller, complete the following steps to ensure that the unit is configured and installed properly.

Reset All Parameters to Factory Defaults: This will reset any parameter that may have been incorrectly set or may be conflicting with the proper operation of this unit. Within the Admin Menu – select Factory Reset, press “Reset Controller” and exit screen.

Enter / Confirm Setup Parameters: Set the correct parameters within the setup screens for proper operation of the unit.

Confirm Proper Wiring to back of Controller: Confirm that all peripheral devices are wired correctly to the back of the device.

Confirm Input Signal on Diagnostic Screen: Review diagnostic screen to confirm proper input signals are being sensed by the unit (example: vary the sash position and the signal should modulate.) – and that the outgoing signals are being read by attached devices (example: vary analog output 1 and confirm that the airflow valve is opening / closing).

Limitation of Warranty and Liability

Seller warrants the goods sold hereunder, under normal use and service as described in the user’s manual, shall be free from defects in workmanship and material for twenty-four (24) months, or the length of time specified in the operator’s manual, from the date of shipment to the customer. This warranty period is inclusive of any statutory warranty. This limited warranty is subject to the following exclusions:

a. Unless specifically authorized in a separate writing by Seller, Seller makes no warranty with respect to, and shall have no liability in connection with, products that are not properly power isolated.

b. Seller does not provide any warranty on finished goods manufactured by others or on any other consumable materials. Only the original manufacturer’s warranty applies.

c. Unless specifically authorized in a separate writing by Seller, Seller makes no warranty with respect to, and shall have no liability in connection with, goods which are incorporated into other products or equipment, or which are modified by any person other than Seller.

d. Seller does not provide any warranty on finished goods that are not installed or wired according to the product installation guide.

TO THE EXTENT OF THE LAW, THE EXCLUSIVE REMEDY OF THE USER OR BUYER, AND THE LIMIT OF THE SELLER’S LIABILITY FOR ANY AND ALL LOSSES, INJURIES, OR DAMAGES CONCERNING THE GOODS (INCLUDING CLAIMS BASED ON CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY OR OTHERWISE) SHALL BE THE RETURNED TO SELLER AND THE REFUND OF THE PRICE OF GOODS, OR, AT THE OPTION OF SELLER, THE REPLACEMENT OR REPAIR GOODS. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES.

UNLESS OTHERWISE EXPRESSLY PROVIDED ON THE DOCUMENTATION HEREOF, AND IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, SELLER WARRANTS ONLY THAT THE GOODS COVERED HEREBY WILL CONFORM TO THE DESCRIPTION ON THE DOCUMENTATION HEREOF, THAT SELLER WILL CONVEY GOOD TITLE THERETO, FREE FROM ANY LIEN OR ENCUMBRANCE, AND THAT SAID GOODS WILL BE FREE FROM DEFECTS IN MATERIAL AND WORKMANSHIP UNDER NORMAL USE AND SERVICE AND PROVIDED SAID GOODS HAVE NOT BEEN REPAIRED, ALTERED OR NEGLECTED AND HAVE BEEN HELD IN NORMAL INDOOR STORAGE PRIOR TO INSTALLATION. ANY CLAIM ON ACCOUNT OF DEFECTIVE GOODS OR FOR ANY OTHER CAUSE WHATSOEVER WILL CONCLUSIVELY BE DEEMED WAIVED BY PURCHASER UNLESS WRITTEN NOTICE THEREOF IS GIVEN TO SELLER WITHIN 12 MONTHS OF SHIPMENT OF THE GOODS TO WHICH SUCH CLAIM RELATES. SELLER WILL BE GIVE REASONABLE OPPORTUNITY TO INVESTIGATE ALL CLAIMS, AND NO GOODS OR PARTS THEREOF MAY BE RETURNED BY PURCHASER TO SELLER UNTIL AFTER RECEIPT BY PURCHASER OF DEFINITE SHIPPING INSTRUCTIONS FROM SELLER. GOODS SO RETURNED WILL BE REPAIRED OR REPLACED WITHOUT CHARGE. SELLER SHALL RESERVE THE EXCLUSIVE RIGHT TO ASSIGN FACTORY REPRESENTATIVES IN THE REPAIR OR MODIFICATION OF GOODS SUPPLIED HEREIN.

SELLER MAKES NO WARRANTY WHATSOEVER WITH RESPECT TO PRODUCTS, ACCESSORIES OR PARTS FURNISHED BY SELLER BUT NOT MANUFACTURED BY SELLER. SUCH PRODUCTS, ACCESSORIES OR PARTS WILL CARRY ONLY THE WARRANTY, IF ANY, OF THE MANUFACTURER THEREOF, AND SELLER HEREBY ASSIGNS TO PURCHASER ALL OF ITS RIGHTS AND INTEREST IN THE WARRANTIES, IF ANY PROVIDED BY THE MANUFACTURERS OF SUCH PRODUCTS, ACCESSORIES AND PARTS TO THE EXTENT THAT THIS ASSIGNMENT IS NOT PROHIBITED BY THE TERMS OF ANY AGREEMENT BETWEEN SELLER AND THE SAID MANUFACTURERS.

THERE IS NO IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. THERE IS NO OTHER WARRANTY, EXPRESSED OR IMPLIED, EXCEPT SUCH AS IS EXPRESSLY SET FORTH HEREIN. SELLER WILL NOT BE LIABLE FOR ANY CONSEQUENTIAL OR SPECIAL DAMAGES FOR ANY BREACH OF WARRANTY OR ANY DAMAGESFOR NEGLIGENCE OR FOR THE COST OF REMOVAL, TRANSPORTATION OR REINSTALLATION OF DEFECTIVE OR REPLACEMENT GOODS. SELLER’S LIABILITY AND PURCHASER’S EXCLUSIVE REMEDY SHALL BE EXPRESSLY LIMITED TO THE REPAIR OF DEFECTIVE GOODS, OR THE SHIPMENT OF EQUIVALENT GOODS F.O.B. THE SHIPPING POINT INDICATED ON THE INVOICE HEREOF, OR THE REPAYMENT OF THE PURCHASE PRICE UPON RETURN OF THE GOODS TO SELLER WITH SELLER’S APPROVAL, OR THE GRANTING OF A REASONABLE ALLOWANCE ON ACCOUNT OF ANY DEFECTS, AS SELLER IN ITS SOLE DISCRETION MAY ELECT.

Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY, which contains the complete and exclusive limited warranty of Seller. This LIMITATION OF WARRANTY AND LIABILITY may not be amended, modified or its terms waived, except by writing signed by an Officer of Seller.

Critical Room Control CRC-FHM, CRC-FHC User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual