Fire-Lite MS-4 Manual: Article Plan

This document outlines a comprehensive guide for the Fire-Lite MS-4, covering installation, operation, troubleshooting, and programming of this four-zone conventional fire alarm control panel.
It details compatibility with System Sensor i3 detectors and provides essential maintenance procedures for optimal system performance and regulatory compliance.

The Fire-Lite MS-4 is a widely utilized, four-zone conventional fire alarm control panel (FACP) designed to provide reliable fire detection and notification. It represents a significant advancement in microprocessor technology applied to conventional fire control systems.
This panel is particularly noted for its compatibility with the System Sensor i3 series smoke detectors, offering features like drift compensation and maintenance alerts. The MS-4 is suitable for a range of applications, including small to medium-sized commercial buildings and residential complexes.
Understanding its features and proper operation is crucial for ensuring life safety and property protection. This manual will guide users through all aspects of the MS-4 system.
Overview of Conventional Fire Alarm Systems
Conventional fire alarm systems, like those utilizing the Fire-Lite MS-4, operate by dividing a protected area into distinct zones. Each zone consists of several initiating devices – typically smoke or heat detectors – wired to the control panel.
When a device activates, the panel identifies the zone where the alarm originated, but not the specific device. This contrasts with addressable systems. Conventional systems are cost-effective and simpler to install, making them ideal for smaller buildings.
The MS-4 leverages this established technology with modern microprocessor control for enhanced reliability and features.
Key Features of the MS-4 Control Panel
The Fire-Lite MS-4 boasts several key features enhancing fire safety and system management. It’s a four-zone conventional panel, compatible with System Sensor i3 series detectors, offering drift compensation and maintenance alerts.
The MS-4 supports both 2- and 4-wire detection zones, providing installation flexibility. It includes one programmable zone and features a 120VAC power supply.
Its microprocessor-based design delivers reliable operation, while the user-friendly interface simplifies programming and troubleshooting, making it a robust and accessible solution.
Technical Specifications
The Fire-Lite MS-4 operates on a 120VAC, 50/60Hz power supply, consuming 2;3A. It’s designed as a four-zone conventional fire alarm control panel.
The panel supports a maximum of four initiating zones, accommodating various detection devices. Compatibility extends to System Sensor i3 detectors, leveraging their advanced features.
The MS-4’s construction ensures reliable performance in diverse environments. Its compact design facilitates easy installation, while adherence to UL standards guarantees quality and safety.
Voltage and Current Requirements
The Fire-Lite MS-4 control panel is specifically designed to operate with a primary power source of 120VAC, functioning effectively at both 50 and 60Hz frequencies.
Its current draw is rated at 2.3 Amperes, necessitating appropriate circuit protection. A 12VDC standby power supply, typically utilizing sealed lead-acid batteries, ensures continuous operation during power outages.
Proper voltage and current levels are crucial for reliable system performance and adherence to safety standards.
Number of Zones
The Fire-Lite MS-4 is configured as a four-zone conventional fire alarm control panel, offering distinct monitoring areas within a protected facility.
Each zone can be independently programmed to respond to initiating devices like smoke detectors or pull stations. This zoning capability allows for precise identification of fire location, facilitating quicker response times.
One zone is programmable for specific functions, enhancing system flexibility. Proper zone configuration is vital for effective fire detection and life safety.

Compatibility with Detectors
The Fire-Lite MS-4 exhibits strong compatibility with the System Sensor i3 series smoke detectors, a key feature for modern fire protection systems.
These i3 detectors offer advanced functionalities like drift compensation and maintenance alerts, improving reliability and reducing false alarms. The MS-4 supports both 2-wire and 4-wire smoke detector configurations.
Compatibility extends to conventional detectors, providing flexibility in system design. Ensuring detector compatibility is crucial for accurate fire detection and system performance.
Installation Guidelines
Proper installation of the Fire-Lite MS-4 is critical for reliable fire detection.
Mounting requires a secure, indoor location, protected from physical damage and environmental factors. Adherence to local codes and standards is essential throughout the installation process.
Careful wiring is paramount, utilizing appropriate gauge wire and following detailed wiring diagrams. Ensure proper grounding and secure connections to prevent malfunctions. Thorough testing post-installation verifies correct operation and system integrity.
Mounting the Control Panel

The Fire-Lite MS-4 should be mounted on a solid surface, ensuring adequate space for wiring and ventilation.
Utilize the provided mounting template for accurate screw placement, maintaining a level installation. The enclosure must be securely fastened to prevent vibration or movement that could affect operation.
Avoid mounting near sources of excessive heat, moisture, or corrosive fumes. Maintain accessibility for future maintenance and inspection, adhering to NFPA 72 guidelines for proper placement.
Wiring Diagrams
Detailed wiring diagrams are crucial for proper installation of the Fire-Lite MS-4.
These diagrams illustrate connections for initiating zones, notification appliance circuits (NACs), power supply, and remote annunciators. Ensure correct wiring polarity and utilize appropriate wire gauges as specified in the manual.
Pay close attention to end-of-line resistor values for initiating zones, and verify all connections before applying power. Refer to the appendix for comprehensive schematics and consult a qualified technician if needed.
Zone Configuration
Proper zone configuration is vital for accurate fire detection with the Fire-Lite MS-4.
Each of the four zones can be programmed to define the type of initiating device connected – smoke detector, heat detector, or manual pull station. Sensitivity adjustments allow tailoring detection thresholds to specific environments.
Careful programming ensures appropriate alarm response and minimizes false alarms. Understanding zone characteristics and device compatibility is key to effective system operation and reliable fire protection.
Programming Initiating Zones
Initiating zone programming on the MS-4 dictates how the panel interprets signals from connected devices.
Each zone must be configured to match the type of detector installed – 2-wire or 4-wire smoke detectors, for example. This ensures correct alarm identification and reporting.
Programming involves setting zone labels and defining sensitivity levels. Accurate configuration is crucial for reliable fire detection and minimizing nuisance alarms, enhancing overall system effectiveness.
Sensitivity Adjustments
The Fire-Lite MS-4 allows for sensitivity adjustments within each initiating zone, optimizing performance for specific environments.
Adjusting sensitivity impacts the threshold at which a detector triggers an alarm, balancing responsiveness and false alarm prevention. Higher sensitivity detects smaller disturbances, while lower sensitivity requires more significant events.
Proper adjustment, particularly with System Sensor i3 detectors featuring drift compensation, is vital for reliable operation and minimizing unnecessary responses.
System Components
A complete Fire-Lite MS-4 system comprises several key components working in unison for reliable fire detection.
These include compatible detectors, notably the System Sensor i3 Series, offering drift compensation and maintenance alerts. Remote annunciators provide remote system status indication, while Notification Appliance Circuits (NACs) activate audible and visual alarms.
Proper selection and integration of these components are crucial for a fully functional and compliant fire alarm system.
Compatible Smoke Detectors (System Sensor i3 Series)
The Fire-Lite MS-4 exhibits full compatibility with the System Sensor i3 Series smoke detectors, a significant advantage for modern fire protection.
These detectors incorporate advanced features like drift compensation, minimizing false alarms due to environmental factors, and a maintenance alert function, simplifying upkeep.
The i3 series ensures reliable detection and contributes to a robust, long-lasting fire alarm system when paired with the MS-4 control panel.
Remote Annunciators
The Fire-Lite MS-4 control panel supports the integration of remote annunciators, extending system visibility and control beyond the main panel location.
These annunciators provide a duplicated display of alarm, trouble, and supervisory status, crucial for larger facilities or complex layouts.
Remote annunciators enhance response times by immediately alerting personnel in distant areas, improving overall fire safety and emergency management capabilities.
Notification Appliance Circuits (NACs)
The Fire-Lite MS-4 utilizes Notification Appliance Circuits (NACs) to activate audible and visual warning devices upon alarm activation.
These circuits power horns, strobes, and other notification appliances, ensuring clear and effective alerts throughout the protected premises.
The MS-4 supports a specific number of NACs, offering flexibility in zoning and device configuration to meet diverse building requirements and code compliance standards.
Fire-Lite MS-4 Operation
The Fire-Lite MS-4 operates by continuously monitoring initiating zones for alarm signals from detectors.
In Normal Operation Mode, the system displays a ready state, indicating all zones are secure and functioning correctly.
Upon detecting an alarm condition, the MS-4 initiates a programmed response, activating notification appliance circuits and providing clear alarm indication via LEDs and potentially remote annunciators.
Proper operation relies on regular testing and maintenance.
Normal Operation Mode
During Normal Operation, the Fire-Lite MS-4 diligently monitors all connected initiating zones for any changes in state.
The control panel’s LEDs will display a steady green light, confirming a stable and fully functional system.
All zones are considered “normal” or “secure,” meaning no alarm, trouble, or supervisory conditions are present.
The MS-4 continuously performs self-diagnostics, ensuring internal components are operating within specified parameters.
Regular visual inspections confirm this ready state.
Alarm Indication and Response

Upon detecting an alarm condition in any zone, the Fire-Lite MS-4 immediately activates audible and visual notification appliances.
A red LED illuminates, clearly indicating the zone in alarm.
The panel initiates a pre-programmed alarm sequence, typically activating horns, strobes, or both.
The system logs the alarm event, recording the time and zone of occurrence.
Remote annunciators, if connected, will mirror the alarm indication.
Immediate response and evacuation procedures should be initiated following alarm activation.
Troubleshooting Common Issues
Common issues with the Fire-Lite MS-4 often include false alarms, frequently caused by dust, insects, or improper detector sensitivity.
Low voltage problems can stem from failing batteries, inadequate power supply, or wiring faults.
Verify proper wiring connections and detector functionality.
Check zone configurations and sensitivity settings.
Inspect for obstructions near detectors.
Consult the manual for specific error codes and troubleshooting steps.
Regular maintenance minimizes these issues, ensuring reliable fire detection.

False Alarm Causes
False alarms on the Fire-Lite MS-4 system are frequently triggered by environmental factors.
Common culprits include excessive dust accumulation within detectors, insect activity, and steam or humidity.
Improper sensitivity settings can also lead to nuisance alarms, reacting to non-fire events.

Wiring issues, such as shorts or grounds, may generate false signals.
Ensure detectors are clean and appropriately positioned, away from potential interference sources.
Regular inspection and sensitivity adjustments are crucial for minimizing false alarm occurrences.
Low Voltage Problems
Low voltage issues with the Fire-Lite MS-4 often stem from a failing battery or a problematic power supply.
Check the battery’s charge level and connections, ensuring it meets the panel’s voltage requirements.
Verify the AC power supply is delivering the correct voltage and is free from interruptions.
Loose wiring connections or corroded terminals can also contribute to voltage drops.
Inspect all wiring for damage and ensure secure connections.
A qualified technician should diagnose and repair any power supply malfunctions promptly.
Maintenance and Testing
Regular maintenance is crucial for the Fire-Lite MS-4’s reliability.
Conduct monthly inspections of the control panel, detectors, and notification appliances for physical damage or obstructions.

Perform annual battery testing to ensure sufficient backup power during outages.
Functional testing of all initiating zones and alarm notification circuits is essential.
Document all testing and maintenance activities meticulously.
Follow NFPA 72 guidelines for proper testing intervals and procedures to maintain system integrity;
Regular Inspection Procedures
Monthly visual inspections should verify the MS-4 panel’s display is clear and LEDs function correctly.
Check for loose wiring connections within the panel and at all device locations.
Inspect detectors for dust accumulation and ensure unobstructed access for smoke or heat.
Verify notification appliances are free from damage and securely mounted.
Confirm all zone indicators accurately reflect the system’s current status.
Document all inspection findings and any corrective actions taken in a dedicated logbook.
Battery Testing and Replacement
Annual battery testing is crucial for ensuring reliable backup power during outages.
Use a calibrated battery tester to measure the voltage and capacity of each battery.
Batteries failing to meet manufacturer specifications must be immediately replaced.
Always replace all batteries within the panel simultaneously to maintain consistent performance.
Properly dispose of old batteries according to local environmental regulations.
Document battery testing results and replacement dates in the system’s maintenance log.
Programming the MS-4
Accessing programming mode requires a key switch and specific code entry, detailed in the installer manual.
Zone programming allows customization of initiating zone characteristics, including naming and sensitivity settings.
Adjustments can be made for detector type, alarm verification, and cross-zoning configurations.
Carefully review all programming changes before saving to avoid unintended system behavior.
Proper programming ensures accurate alarm identification and appropriate response sequences.
Refer to the programming guide for a complete list of available options and their functions.
Entering Programming Mode
To initiate programming, locate the key switch on the MS-4 control panel.
Insert the appropriate key and turn it to the “Program” position.
The panel will prompt for a six-digit access code, typically “123456” by default, but changeable for security.
Enter the code using the keypad and press the “Enter” key.
A programming menu will appear on the display, allowing access to various system settings.
Consult the installer manual for the correct code if the default is not functioning.
Zone Programming Details
Within programming mode, each of the four zones can be individually configured.
You can assign zone descriptions, such as “North Wing” or “Kitchen,” for easy identification during an alarm.
Programming allows setting zones for normal, alarm, or trouble conditions.
Sensitivity adjustments can be made to tailor detector response to specific environments.
The MS-4 supports both 2-wire and 4-wire smoke detector configurations within each zone.
Proper zone programming is crucial for accurate alarm location and efficient response.
Understanding System Status Indicators
The Fire-Lite MS-4 utilizes a series of LED indicators to communicate system status at a glance.
A steady “Alarm” LED signifies an active fire alarm, pinpointing the affected zone.
A flashing “Trouble” LED indicates a system malfunction, requiring immediate attention.
The “Supervisory” LED signals issues with power supply or communication circuits.
A “Disabled” LED shows a zone is temporarily taken offline for maintenance.
Understanding these indicators is vital for quick diagnosis and effective system management.
LED Indicators and Their Meanings
The MS-4’s front panel features crucial LED indicators for quick status assessment.
“Alarm Silence” illuminates when the alarm has been manually silenced.
“Power” LED confirms the control panel is receiving adequate power.
“Zone” LEDs illuminate corresponding to the zone in alarm or trouble.
A flashing “Communication” LED indicates activity on the communication line.
Refer to the panel’s documentation for a complete list and detailed explanations of each indicator’s meaning.
Fire-Lite MS-4 vs. MS-2/MS-2E
The Fire-Lite MS-4 builds upon the foundation of the MS-2 and MS-2E models, incorporating updated microprocessor technology for enhanced reliability.
Like its predecessors, the MS-4 supports conventional fire control systems and is compatible with System Sensor i3 series detectors, offering drift compensation.
However, the MS-4 may feature improvements in programming interfaces or expanded functionality.
Users upgrading from MS-2/2E should consult the MS-4 manual for specific compatibility and migration details.
Regulatory Compliance
The Fire-Lite MS-4 is designed to meet stringent industry standards for fire alarm control panels, ensuring life safety and property protection.
Crucially, the MS-4 carries UL (Underwriters Laboratories) listings and approvals, demonstrating compliance with nationally recognized testing procedures.
These listings verify the panel’s performance, reliability, and adherence to safety regulations.
Installation and maintenance must follow NFPA 72 guidelines to maintain compliance and ensure proper system operation.
Refer to the product documentation for specific UL certifications.
UL Listings and Approvals
The Fire-Lite MS-4 boasts comprehensive UL 864 listings, signifying its compliance with standards for fire alarm control units.

Specifically, it’s listed for local, auxiliary, and remote station fire alarm systems, offering versatility in application.
UL verification confirms the panel’s ability to reliably detect, notify, and respond to fire events.
These approvals are essential for code compliance and insurance requirements.
Detailed UL information, including file numbers and specific standards met, can be found in the product’s official documentation.
Where to Find Additional Resources
For in-depth information, consult the official Fire-Lite documentation available on the Honeywell Building Solutions website.
This includes installation manuals, programming guides, and technical specifications for the MS-4 control panel.
Direct support can be obtained through Fire-Lite’s dedicated support team, offering assistance with troubleshooting and system configuration.
FireAlarm.com and RYBB Fire Alarm Parts also provide valuable resources and parts availability.
Remember to reference document DF-52266:A2 for specific details regarding the MS-4(E) model.
Fire-Lite Documentation
Comprehensive documentation for the Fire-Lite MS-4 is readily accessible through Honeywell Building Solutions’ official website.
Key documents include detailed installation manuals outlining proper mounting and wiring procedures, ensuring a secure and reliable system.
Programming guides provide step-by-step instructions for zone configuration and sensitivity adjustments.
Technical specifications, like document DF-52266:A2, offer crucial details on voltage requirements and compatibility with System Sensor i3 detectors.
These resources are vital for installers, technicians, and end-users alike.
Support Contact Information
For dedicated support regarding the Fire-Lite MS-4, contacting Honeywell Building Solutions directly is recommended.
Their expert team can assist with technical inquiries, troubleshooting complex issues, and clarifying programming procedures.
RYBB Fire Alarm Parts, Service, & Repairs also offers specialized support for Fire-Lite systems, including the MS-4 model.
FireAlarm.com provides a platform for accessing information and potentially connecting with support resources.
Ensure you have the model number (MS-4) readily available when contacting support for efficient assistance.
Appendix: Wiring Schematics
Detailed wiring schematics for the Fire-Lite MS-4 are crucial for proper installation and maintenance.
These schematics illustrate the connections for initiating zones, notification appliance circuits (NACs), and power supplies.
Refer to document DF-52266:A2 for foundational schematics, though updated versions may exist.
Ensure adherence to National Fire Protection Association (NFPA) standards and local codes when interpreting and implementing these diagrams.
Proper wiring is essential for reliable fire detection and alarm signaling.