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Summary of Contents for SystemAir CH-M
- Page 1 CH-M Multi-Zone Control Hub Installation / Operation Manual Systemair Mfg. Inc., 10048 Industrial Blvd Lenexa KS USA 66215 Tel. 1.800.747.1762 USsupport@fantech.net 494094 July 15, 2024...
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Page 2: Table Of Contents
Table of Contents Introduction ..............................5 General Description ..........................5 Features and Benefits ......................... 6 Technical Specifications ........................... 7 Product Specifications ......................... 7 Target Gas Specifications ........................8 Operation Safety Notice .......................... 9 Types of Notices ..........................9 Quick Start Guide ........................... 10 Step 1 –... - Page 3 Settings Menu ..........................28 Factory Default Settings ........................29 Adjusting the Hardware Settings ..................... 30 Changing the Detector Address ....................30 Changing the Relay Board Address ................... 30 Changing the Analog Output Scale .................... 30 Adjusting the Software Settings ....................... 31 Adding/Removing Sensors ......................
- Page 4 Sensor # Calibration Invalid......................46 Sensor # Unsupported Gas Type ....................46 Relay Board # Communication Loss ..................46 SD Card Error – Insert SD Card ....................46 SD Card Error – Replace SD Card ..................... 47 Checking and Replacing the Battery ....................47 Checking and Replacing Fuses .......................
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Page 5: Introduction
After comparing the digital signal to preset values, the hub updates the display and relays. The CH-M housing has a NEMA 4X rating and is supplied with knockouts so that the control hub can mount directly to a standard four inch conduit box. A hinged cover secured by two screws makes it easy to gain access to the touchscreen for system configuration. -
Page 6: Features And Benefits
Features and Benefits • Limitless Possibilities ◦ Fully Configurable Zones, Relays, Setpoints, Delays, and Outputs ◦ Scalable System Size via Relay Expansion Packs • Increased Control ◦ On-Demand Ventilation Control by Gas Concentration, Timer Schedule, or User Input ◦ 7” Full-Color LCD Touch Screen •... -
Page 7: Technical Specifications
Technical Specifications Product Specifications Input Power 24 VAC, 50/60 Hz, 0.75 A Installation Category II (local level, over-voltage transients less than 500V) Storage Temperature -50°C to 120°C (-58°F to 248°F) Operating Temperature -20°C to 50°C (-4°F to 122°F) Humidity 10% to 90% (non-condensing) Ventilation Control Relays 125 VAC, 50/60 Hz, 5 A resistive, 250 VA inductive Relay Capacity... -
Page 8: Target Gas Specifications
Systemair has designed detectors so that the measurement ranges for each target gas meet the agencies’ requirements. Each target gas, for which Systemair currently produces a sensor, is listed below along with the relevant concentration specifications. -
Page 9: Operation Safety Notice
Operation Safety Notice Certain procedures and operations detailed in this manual require that specific precautions be taken prior to beginning the procedure or operation. When precautions are required, a notice will be printed in an appropriate location in the manual. The user is urged to read and understand all such notices. -
Page 10: Quick Start Guide
Operation with the wrong power requirement will void the manufacturer’s warranty and the installer will be responsible for any damage that occurs. Contact Systemair before connecting power to the control hub or detectors if you are unsure of the correct power requirement. -
Page 11: Step 3 - Remote Detector Wiring
This device uses an EMI power line filter to reduce unwanted noise. Connect the incoming power conductors to the line side of the filter. The load side of the filter is already wired to the input power terminals on the relay board. Be sure to ground the control hub at the center terminal of the line filter. -
Page 12: Step 4 - Relay Wiring
situation dictates. Follow the wiring diagrams on pages 20 through 23 to determine the proper connections at the hub. Step 4 – Relay Wiring The relay board inside the control hub has four relays with connections for both normally open (NO) and normally closed (NC) operation. -
Page 13: Step 7 - Testing The System
Step 7 – Testing the System The manual overrides on this control hub can be used to open and close the relays to verify that ventilation and warning equipment is connected properly. This feature can be accessed from the individual Relay Settings screens. Page 19 contains a more complete procedure for testing the system. -
Page 14: Installation
Installation Mounting the Control Hub The control hub is the central hub for monitoring and controlling all of the detectors. However, it does not necessarily need to be mounted in a centralized location. It should be mounted indoors in a dry location where authorized users will have easy access and the display can be easily read. - Page 15 • Do not locate any detector further than 4000 feet from a control hub or expansion pack. • The types of gases each unit is designed to monitor have varying densities. For CO and NO , mount the unit at the average breathing height – approximately 5 to 7 feet from the floor.
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Page 16: Connecting The Power Supply
surface with screws. Securely tighten the fitting nut on the inside of the conduit box so it will not loosen over time. • Attach the housing to a solid support base using screws through the mounting feet. Find a flat area at least six inches high by six inches long and place the back of the housing flat against it. -
Page 17: Connecting The Remote Detectors
Contact Systemair MFG. Inc. before connecting power to the control hub and detectors if you are unsure of the correct power requirement. This device uses an EMI power line filter to reduce unwanted noise. Connect the incoming power conductors to the line side of the filter. -
Page 18: Connecting The Ventilation System
CAUTION It is very important that the power and signal connections between each detector and between the detectors and the control hub be correct. If the connections are wired incorrectly, damage to both the detectors and the control hub will occur. Use a cable with color-coded conductors and make sure that the same conductor connects to the same terminal on each detector and the control hub. -
Page 19: Connecting The External Alarm
Figures 1 and 2 on page 20 show typical alarm wiring. Connecting the Voltage or Current Proportional Output The CH-M and REP-M Relay Expansion Pack include circuits that provide either a current loop or voltage proportional output. Each output produces a linear response over the full scale range of the average of all connected sensors in a zone. -
Page 20: Typical Installation Diagrams
Typical Installation Diagrams Figure 1: Wiring – Two Fan Ventilation System with Common Alarm Figure 2: Wiring – Two-Speed Fan Ventilation System... - Page 21 Figure 3: Wiring – Detector Connection – Daisy Chain Figure 4: Wiring – Detector Connection – Single View...
- Page 22 Figure 5: Wiring – Analog Output...
- Page 23 Figure 6: Wiring – Relay Connections...
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Page 24: Operation
How the Hub Controls the Ventilation Equipment The CH-M allows the user to configure a ventilation control system in a variety of ways to meet almost any specification. Below are the components used to build these configurations. If requested at the time of order, Systemair will customize the configuration to match a job requirement so that the only field work needed is installation. -
Page 25: Zones
Analog Output Each CH-M and REP-M Relay Expansion Pack is equipped with one analog output that generates a 4-20 mA, 2-10 VDC, 1-5 VDC, or 0.2-1 VDC signal. This signal is proportional to the average concentration of target gas present in the assigned zone. It may be used for monitoring gas or for controlling a VFD. -
Page 26: Navigating The User Interface
Navigating the User Interface Home Screen The Home Screen is where the control hub will be most of the time. This page is the central hub for displaying all of the information available on the hub. While not interacting with the hub, the Home Screen will automatically scroll through each configured zone. -
Page 27: Zone Screen
Zone Screen The Zone Screen gives more information about a zone. Here, the user can see each relay configured to that zone and each sensor configured to that relay. Sensor icons will display the current gas concentration value. As with the Home Screen, the zone concentration values will change colors depending on the setpoints. -
Page 28: Passcode Entry Screen
Passcode Entry Screen Upon pressing the “Settings” icon, the user will be asked for a passcode. This passcode is assigned at the factory and included in the packaging with every order. Entering the passcode will allow the user to make changes to the system. After five minutes of inactivity, the hub will automatically return to the Home Screen and the passcode will need to be reentered. -
Page 29: Factory Default Settings
Factory Default Settings Unless otherwise specified on the order form, the following settings will be used to configure the control hub. Setting Default Sensors All Sensors Configured Relays 4 Relays Relay 1 (Low Alert) All Sensors On-Delay 1 minute Off-Delay 1 minute Activation Type Single... -
Page 30: Adjusting The Hardware Settings
Current Date/US Central Time (CT) Daylight Savings Time Correction Each detector ordered will be assigned an address 1 through 128 as applicable. Detector addressing should not be changed without first consulting Systemair technical support. Adjusting the Hardware Settings Changing the Detector Address The detector address is set by SW1 on the top, right side of each sensor board using a binary counting system. -
Page 31: Adjusting The Software Settings
Adjusting the Software Settings Adding/Removing Sensors To configure the sensors, navigate to Settings > Sensor Map. Active sensors will appear in green while inactive sensors will appear in gray. Each sensor icon will also include the gas type and current value (if present). If a sensor is not communicating with the control hub, it will default to gas type “CO”. -
Page 32: Adding/Removing Zones
Adding/Removing Zones Only zones that are configured will appear on the Home Screen. To add a zone, go to Settings > Zone Settings and select “Add/Remove Zone”. Press “Add Zone” in the pop-up window. There must always be at least one zone present for the system to function. A maximum of 32 zones may be configured. -
Page 33: Adjusting The Delays
Adjusting the Delays On-delays and off-delays can be set for each relay to adjust the duration before energizing/de- energizing the contacts. Navigate to Settings > Relay Settings > Relay #. Then tap “Setpoint Delay” and use the arrows to adjust the values. If no delay is desired, set the delay time to “0:00”. -
Page 34: Adjusting The Zone Display Type
To adjust the activation type for a relay, go to Settings > Relay Settings > Relay # and select “Activation Type”. To adjust the activation type for a zone alarm, go to Settings > Zone Settings > Zone # and select “Alarm Settings”. Not all activation types will always be available. Adjusting the Zone Display Type The zone display controls what gas concentration values are shown on the Home Screen. -
Page 35: Assigning Relays
will only dissociate that sensor from the current relay. Any other assignments will remain in effect. Assigning Relays In order for a relay to display its information, it must be assigned to a zone. To assign a relay, go to Settings > Zone Settings > Zone #. Then tap “Add/Remove Relay”. This will bring up the Relay Map to display all currently configured relays. -
Page 36: Changing Relay Levels
Changing Relay Levels Relay levels are used to coordinate the operation of multiple relays on a single zone. Relays of the same level can remain engaged at the same time. Relays of a higher level will disengage relays of a lower level when engaging themselves. This configuration is primarily intended for multi-speed fans but it may also be used for operating multiple equipment types in stages. -
Page 37: Changing Zero Setpoints
Changing Zero Setpoints Certain gases may have different ambient concentrations than the default settings. To adjust the zero setpoint to the desired ambient concentration, navigate to Settings > Zero Setpoints. Then use the arrows to change the normal ambient concentration levels for each gas. Levels specified here are used to align the scale for the proportional output. -
Page 38: Setting Automatic Overrides
Setting Automatic Overrides Each relay can schedule up to four separate times for an automatic override. Of these times, three may be used to force the relay into an active state while one may be used to force it into an inactive state. -
Page 39: Configuring Bacnet
Should too many changes be made that cause the hub to operate in an undesirable manner, Two options are available to reset the CH-M under Settings > Reset Options. “Reset to Default” will erase any custom sensor, relay, or zone settings while leaving all assignments intact. -
Page 40: Using The Analog Outputs
23 on page 62 of this manual. As an example, a Systemair Carbon Monoxide Detector has a full scale output of 200 PPM CO. For the 4-20 mA output mode with a single sensor configured, 0 PPM CO would equal 4 mA while 200 PPM CO would equal 20 mA. -
Page 41: Obtaining The Best Operation
Obtaining the Best Operation This hub is designed to control the ventilation system in response to a rising or falling concentration of the target gas at its detectors. No two installations will be exactly the same. Different ventilation components, the number of gas producing sources, air flow patterns inside the room, the total room volume, and the exact location of the detectors influence how effective the system is in controlling the target gas concentration. -
Page 42: Maintenance
100% response. If the response time is too slow or the concentration displayed is outside of acceptable tolerance, the sensor should be recalibrated or replaced. To ensure proper response and accuracy, Systemair recommends testing toxic detectors once every six months and combustible detectors once every three months. -
Page 43: Replacing The Sensor
Replacing the Sensor The sensor’s useful lifetime depends greatly upon its operating conditions. Continuous operation around large or numerous gas sources may shorten the sensor’s useful life. A recommended recalibration date is recorded on the front hub label of each detector. To replace a sensor module, remove the two retaining screws and carefully open the cover. -
Page 44: Suggested Repair Parts
Suggested Repair Parts Below is a list of parts that may be replaced inside Systemair Control Hub and Remote Detector products. Please consult your local Systemair representative for pricing and availability. Part Number Description 494132 CO Sensor | Carbon Monoxide Sensor... -
Page 45: Troubleshooting
Troubleshooting Error Messages The CH-M is programmed to display error messages to indicate a problem condition with the unit. The bottom center of the Home Screen will scroll through each message present. When an error occurs, the alarm will chirp and a silence button will replace the calendar icon to allow a user to mute the alarm. -
Page 46: Sensor # Sensor Missing
If a sensor module is configured for a gas type that is not supported by the current firmware version on the control hub, this error will appear on the display. Contact Systemair Technical Support to update the firmware. Relay Board # Communication Loss This error message means that the hub is unable to communicate with the indicated relay board and attempts to reestablish communication have failed. -
Page 47: Sd Card Error - Replace Sd Card
The real-time clock circuitry is powered by a single CR1220 lithium-ion battery. This circuit is responsible for maintaining the date and time settings while the CH-M does not have power. If the date and time settings reset after a power cycle, the CR1220 battery may need to be replaced. -
Page 48: Common Installation/Operation Mistakes
Improper communication wiring, or exceeding the number of nodes on a single bus, can cause communication between the hub and detectors to be inconsistent. The CH-M uses Modbus RTU over RS-485 for communication. All standard guidelines apply for this type of wiring. -
Page 49: Delay Period Set Incorrectly
situation in which the target gas concentration becomes dangerous, or the area contains too much smoke from engine exhaust. Again, adjust the setting to a level that produces the best overall operation. Be sure to check all applicable federal, state, and local guidelines as these may dictate the required concentration. -
Page 50: Relay Activation Type Set Incorrectly
Systemair strongly recommends that the control hub be grounded according to applicable wiring codes. However, if this is not possible, using a stylus or otherwise ensuring that the touch input is at the same potential as the floating ground will improve touch accuracy and responsiveness. -
Page 51: Limited Warranty
Upon receipt by Systemair of your written concern, you will be notified of our receipt as to the review process to manage the specific claim. If deemed a manufacturing defect and Systemair determines that you are entitled to a warranty claim, a resolution will be provided and a RMA Number shall be issued for reference on all communications. -
Page 52: Appendix
Models and Descriptions Detector Model and Description Each Systemair Remote Detector is given a model that describes the type(s) of target gas(es). This model appears on the front hub label. Use the following list to completely identify a detector once you know the model. -
Page 53: Figures And Diagrams
Figures and Diagrams Figure 7: Home Screen Layout – Normal Figure 8: Home Screen Layout – Alarm... - Page 54 Figure 9: Detector Front Cover Layout Figure 10: Detector Wiring (Systemair Color Code)
- Page 55 4-20 mA 2-10 VDC 1-5 VDC 0.2-1 VDC Figure 11: Detector Proportional Output Settings Sensor 1 Sensor 2 Sensor 3 Sensor 4 Figure 12: Addressing (Address of First Sensor on Board)
- Page 56 Sensor Switch Sensor Switch Sensor Switch Sensor Switch Address Position Address Position Address Position Address Position 0000000 0100000 1000000 1100000 0000001 0100001 1000001 1100001 0000010 0100010 1000010 1100010 0000011 0100011 1000011 1100011 0000100 0100100 1000100 1100100 0000101 0100101 1000101 1100101 0000110 0100110 1000110...
- Page 57 Relay Wiring (TS3-TS6) Figure 14: Relay Contact Connections AC Input Wiring (TS1 & TS2) Figure 15: Input Power Connections...
- Page 58 -COMM +COMM ISO GND Isolated COMM (TS7) Figure 16: Detector Connection – Input Non-isolated COMM (TS8 & TS11) Figure 17: Detector Connection – Output...
- Page 59 Relay Board # Figure 18: Relay Board Address Assignment Isolated Resistors Non-isolated Resistors Figure 19: Relay Board Bias/Termination Resistors...
- Page 60 2-10 VDC 1-5 VDC 0.2-1 VDC 4-20 mA Figure 20: Analog Output Settings Carbon Monoxide Nitrogen Dioxide Name Hydrogen Relative Density 0.97 1.58 0.07 Recommended Detection Medium Medium High Height Hazard Toxic Toxic Combustible OSHA PEL 50 PPM 1 PPM NIOSH REL 35 PPM 1 PPM...
- Page 61 Figure 22: Dimensions (Inches – Not to Scale)
- Page 62 Carbon Dioxide CO Concentration (PPM) 2-10(VDC) 4-20 (mA) 1-5 (VDC) 0.2-1 (VDC) Nitrogen Dioxide NO2 Concentration (PPM) 2-10(VDC) 4-20 (mA) 1-5 (VDC) 0.2-1 (VDC) Hydrogen H2 Concentration (PPM) H2 Concentration (LEL) 2-10(VDC) 4-20 (mA) 1-5 (VDC) 0.2-1 (VDC) Figure 23: Proportional Output Scales (OFFSET ON)
- Page 63 © Copyright Systemair All rights reserved Systemair reserves the rights to alter their products without notice. This also applies to products already ordered, as long as it does not affect the previously agreed specifications.
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