Related Manuals for Chromalox CHSI Series
Summary of Contents for Chromalox CHSI Series
- Page 1 INSTALLATION & OPERATION INSTRUCTIONS CHSI SERIES CONTROLS USER MANUAL CHSI-CTRL-2024-0927 January 2025...
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Page 2: Table Of Contents
TABLE OF CONTENTS ..............................4 INTRODUCTION Overview .....................................4 Warnings & Cautions .................................4 Disclaimers and Local Codes ............................4 INSTALLATION ................................5 Product Overview ................................5 Display Hardware ................................6 Screen Navigation ................................7 CONTROLS MENU ..............................8 Boiler Menu ..................................8 Boiler Control ..............................9 Boiler History ..............................11 ..............................11 Boiler Demand PID Configuration... - Page 3 CHSI SEQUENCE OF OPERATIONS ............................24 MAINTENANCE ...................................25 ModSync Alarms ..............................25 Backing up the Program ............................26 Battery Replacement ............................26 Common Troubleshooting Problems ........................26 DOWNLOADING A PROGRAM .............................27 Record The Customer Settings..........................27 Replace the Battery ..............................27 Initial Setup ................................28 Connecting to the PLC ............................28 Performing the Program Update ..........................30 Verifying the Settings and Setup ..........................32 Flash Memory Backup ............................32...
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Page 4: Introduction
CHSI Installation and Operation manual. and be made permanently available to the staff responsible for equipment operation. Chromalox reserves the right to change any part of this This user manual should not be considered as a addendum. -
Page 5: Installation
INSTALLATION OVERVIEW Steam SC750 Control Hardware and screen navigation are explained in the following sections. Screenshots are for reference only and will vary by boiler product line and Software Version installed. Please be aware of which configuration has been supplied for your application. The customer should examine the equipment for any damage. - Page 6 REMOVING SNAP-IN I/O MODULE 1. Locate the four buttons on the sides of the controller, two on either side. 2. Press the buttons and hold them down to open the locking mechanism. 3. Gently rock the module from side to side, easing the module from the controller. RE-INSTALLING SNAP-IN I/O MODULE 1.
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Page 7: Screen Navigation
Machine Interface (HMI), algorithms, features and functions will vary depending on program version and boiler model. For detailed information specific to your boiler, please have your boiler Serial Number and software version ready and contact your Chromalox Representative for further support. MAIN MENU PICTURE... -
Page 8: Controls Menu
Interface selection. standards which may be applicable. Chromalox reserves the right to change any part of this When in Automatic Control the temperature controller will user manual and the corresponding Installation and energize and modulate elements to achieve the setpoint. - Page 9 Table 1 - Parameters Parameter Name Range Unit Description Wiring Modbus Register Boiler Status 0-1 Reserved Current Operating sequence of the boiler. 2 - Boiler Off 3 - Reserved 4 – Standby 5-6 – Reserved 7 – Running 8 – Reserved 9 –...
- Page 10 Table 1 - Parameters (Continued) Parameter Name Range Unit Description Wiring Modbus Register Calculated percentage of the Operating Rate 0 to 100 (4)1838 currently energized elements INT16 compared to the total number Read of elements Control Variable 0 to 100 PID based variable used to determine staging and boiler operation...
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Page 11: Boiler History
• Boiler History Displays Current Information for the Element/Stages including active stages (green), staging order, individual hours or operation, cycles, and kWh. • Boiler Demand Used as a quick reference to determine the status of items required for the boiler to run. All items should be green during normal operation and call for heat. -
Page 12: Pid Configuration
• PID Configuration The PID is used to calculate the control variable, which is used to stage contactors as well as reference signal for the SCR used for electric element modulation between stages. Parameter Name Range Unit Description Wiring Modbus Register Proportional 0 to 100.0 Represented as a percentage of... -
Page 13: Freeze Protection
• Freeze Protection Designed to keep the boiler from damage associated with freezing by running the boiler to a user defined water temperature. Parameter Name Range Unit Description Wiring Modbus Register Freeze Protection Enable/Disable Turns the Freeze protection feature Factory installed on or off water... -
Page 14: Cold Start
• Cold Start Limits the modulation rate of the boiler until a user defined water temperature is reached. Parameter Name Range Unit Description Wiring Modbus Register Rate Hold Enable/Disable Turns the Rate Hold feature on or off Duration 00:00 to 59:59 Deg F Time for which the boiler runs at the low modulation rate after a... -
Page 15: Soft Limit
• Soft Limit Useful in Lead/Lag setups the Soft Limit will reduce the boiler modulation rate when the outlet pressure becomes excessive. The Soft Limit serves as a buffer for the Manual Reset High Limit and can reduce short cycling based on pressure. Parameter Name Range Unit... -
Page 16: Setpoint Menu
SETPOINT MENU • Setpoint Configuration Used to set the local boiler setpoint as well as minimum and maximum setpoint ranges. Parameter Name Range Unit Description Wiring Modbus Register Current Setpoint 0 to 200.0 Current setpoint being used by Modbus RTU (4)1803 the boiler regardless of source or Hardwire... -
Page 17: Deviation
• Deviation Useful in Lead/Lag setups the Soft Limit will reduce the boiler modulation rate when the outlet pressure becomes excessive. The Soft Limit serves as a buffer for the Manual Reset High Limit and can reduce short cycling based on pressure. Parameter Name Range Unit... -
Page 18: Alarm History Menu
ALARM HISTORY MENU • Active The Active Alarm screen shows the most recent alarm that has occured and would prevent the boiler from operating. • Alarm History Time and Date stamp for the last 100 alarms. -
Page 19: Configuration Menu
CONFIGURATION MENU • System Configuration Contains control setup and Programming information Parameter Name Range Unit Description Wiring Modbus Register Time/Date MM/DD/YY Pressure below setpoint when the boiler will receive a call for heat. Factory Defaults Loads the Factory Defaults and will overwrite current user settings Boiler Model FB-Z (Electric) -
Page 20: Sensor Configuration
• Sensor Configuration Setup information and adjustments for connected sensors. Parameter Name Range Unit Description Wiring Modbus Register High Range 0 to 200.0 Applies to scaling for the outlet pressure transducer only. Sensor Bias 0 to 10.0 Psi / Deg F Adds an offset to the sensor value Final Value... -
Page 21: Alarm Configuration
• Alarm Configuration Allows users to clear the alarm history. TECH TOOLS MENU • Staging Configuration Allows users to customize the staging options. Parameter Name Range Unit Description Wiring Modbus Register Number of Stages 0 to 10 Total number of stages that Factory installed are setup for this specific contactors and... -
Page 22: Staging Information
• Staging Information Displays information on the curent state and setup of the stages. • Manual Staging Used to manual trigger individual element stages and used for startup or troubleshooting. Stages put in manual will be removed from the normal staging sequence and not be counted towards the total number of element stages that are available. -
Page 23: Installation Setup
• Staging Information Displays information on the curent state and setup of the stages. Parameter Name Range Unit Description Wiring Modbus Register Limit Electric 1-10 Limits the total number of (4)1834 Stages to elements that can be INT16 staged at one time in the Read normal sequence. -
Page 24: Chsi Sequence Of Operations
5. A Lag stage will be enabled after the next CV% stage has been Chromalox reserves the right to change any part met and the On delay time has expired. of this user manual and the corresponding 6. -
Page 25: Maintenance
Error outside of the allowable scale. Verify the RTD wiring, replace the sensor if necessary. Chromalox reserves the right to change any Loop RTD Sensor Error The Hydronic Loop Sensor is providing a value part of this user manual and the that is outside of the allowable scale. -
Page 26: Backing Up The Program
• Backing up the Program Backing up the program aids in preventing the program from being lost when replacing the battery or the controller is powered down. Note: This process does not save customer settings. 1. Press and hold your finger on the screen for 5-10 seconds. The ‘Info Mode’ Screen will be displayed. -
Page 27: Downloading A Program
DOWNLOADING A PROGRAM Program Updates for the PLC on the SC-750 will be broken out into several sections. 1. Record Customer Settings (if applicable) 2. Replace the Battery CR2450 (If required) 3. Initial Setup - Preparing the software, drivers, and cables. 4. -
Page 28: Initial Setup
Software%20Utilities/ UnitronicsUniDownloader_5_0_B30.exe The compiled program file, provided by Chromalox. The file extension ends in “.udc” • Connecting to the PLC Connect the Cable to both your Computer and the HM. The USB mini port is located on top of the display. - Page 29 Test PLC Connection. Open the Unidownloader software and navigate to the Connections menu. Select the Com port from the drop down to match what is seen in the device manager and select a baud rate 19200, 38400, and 57600 are all acceptable. Press Get OPLC information and wait for the three lines above to fill in.
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Page 30: Performing The Program Update
• Performing the Program Update Using the unidownloader program open the file provided by Fulton and ending in “.UDC.” Check that the file name matches the panel that you are downloading to. - Page 31 Verify the port settings in the connections menu and press ‘Get OPLC Information’. Press the green ‘play’ button when ready to start the download.
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Page 32: Verifying The Settings And Setup
Each file will load before proceeding to the next and give the status and progress bar. This process can take 15-20 minutes or more. When complete, acknowledge and prompts and allow the PLC to reboot, if required. Then disconnect the cable. •... - Page 33 Enter the password of ‘ 1 1 1 1 ‘ and then press enter. Select ‘Flash Memory’ from the ‘Information Mode Main Menu’ Select ‘Backup User Application’ from the ‘Flash Memory’ menu and the ‘Yes’ at the Prompt When complete the DLU with display ‘This app is already backed up’. Press ‘ESC’...
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Page 34: Sc750 Settings
SC750 SETTINGS Boiler Configuration Factory Settings User Settings Boiler: Enabled Interface: SC-750 Boiler Mode: Auto Manual Control: Boiler Start Rate: Setpoint Configuration Factory Settings User Settings SC-750 Local Setpoint: 0.0 psi Minimum Setpoint Pressure: 0.0 psi Maximum Setpoint Pressure: 0.0 psi PID Configuration Factory Settings User Settings... - Page 35 Element Staging Factory Settings User Settings Rotation Priority Hours (Hours/Cycles) Stage On Delay (MM:SS) 01:00 (MM:SS) Stage Off Delay (MM:SS) 01:00 (MM:SS) Lag 1 Lag 2 Lag 3 Lag 4 Lag 5 Lag 6 Lag 7 Lag 8 Lag 9 100% Cold /Slow Start: Enabled...
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Page 36: Bms Integration
BMS INTEGRATION BMS Networking - RS485 Modbus Points List Modbus Address Description Range Type Units (4)1801 Water Temperature 0 to 400.0 INT16 Deg. F [Note 1] (4)1803 Boiler Setpoint 0 to 200.0 INT16 [Note 1] (4)1804 Boiler Setpoint Mode INT16 0 –... - Page 37 Modbus Address Description Range Type Units (4)1826 Stage 3 Operation 0 – Off INT16 1 – On (4)1827 Stage 4 Operation 0 – Off INT16 1 – On (4)1828 Stage 5 Operation 0 – Off INT16 1 – On (4)1829 Stage 6 Operation 0 –...
- Page 38 Limited Warranty: Please refer to the Chromalox limited warranty applicable to this product at http://www.chromalox.com/customer-service/policies/termsofsale.aspx. Chromalox, Inc. 103 Gamma Drive Pittsburgh, PA 15238 (412) 967-3800 www.chromalox.com © 2025 Chromalox, Inc.
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