HONEYWELL Q979C1036 Flame detector

Product Dimensions：

The Honeywell Q979C1036 is a Wall Unit with Remote Sensor and Setpoint Module. It is designed to be installed in a room to allow occupants or maintenance staff to monitor the current temperature and adjust the desired temperature (setpoint) for the controlled zone.

• Primary Function: To provide a localized interface for temperature measurement and setpoint adjustment within a larger Building Management System (BMS) or HVAC control loop.

• Design: Typically a discreet wall-mounted unit that connects to a main controller (like a temperature/process control board) to modulate the heating or cooling output.

• Modulation: The description suggests it is a 24 V AC Modulating Controller, meaning it likely provides an analog signal (e.g., $0-10 \text{ V}$ or $\text{mA}$ signal) to the main controller or actuator, enabling smooth, proportional control of the heat/cool output rather than simple ON/OFF switching.

⚙️ Product Specifications (Key Parameters)

Note on Setpoint: The notation $-5 \text{ to } +5 \text{ K}$ (Kelvin) suggests the user adjustment range is $\pm 5$ degrees relative to a central or base setpoint programmed in the main controller.

✨ Product Advantages

• Proportional Control: The modulating output allows for precise and stable temperature control, minimizing temperature swings and improving occupant comfort compared to simple two-position (ON/OFF) thermostats.

• Remote Sensing/Setpoint: It centralizes the user interface (setpoint adjustment) in an accessible location while potentially using an external or remote sensor for a more accurate temperature reading in the critical zone.

• Integration Ease: Designed to integrate smoothly into common low-voltage $24 \text{ V AC}$ HVAC control systems, particularly those utilizing analog inputs for modulating control.

• Durability and Reliability: As an industrial or commercial-grade component from Honeywell, it is built to meet stringent standards for continuous operation.

⚠️ Cautions (Important Notes)

1. Low Voltage System: This is a $24 \text{ V AC}$ device. Never connect it directly to line voltage ($120 \text{ V AC}$ or $230 \text{ V AC}$), as this will destroy the unit and pose a safety hazard.

2. Modulating Output Compatibility: Ensure the main temperature or process controller it is wired to is capable of receiving and processing the modulating signal (voltage or current) output by the Q979C1036.

3. Wiring Integrity: Installation must be done by a qualified HVAC technician, following the specific wiring diagram for the Q979C series to ensure correct signal transmission and power supply.

4. Application Specificity: The Q979C series often works as a complementary component to a central burner management or process controller. It is not a standalone system capable of directly controlling a burner or large chiller without an intermediary control panel.