Securing the Enclosure Cover

Adjusting the Line Lock (Vertical Phase) for 24 VAC Operation

Phase adjustment may be necessary in multiple camera installations to prevent picture roll when switching between two cameras. To adjust the vertical phase while switching between two cameras, turn the Line lock adjustment screw on one camera until there is no vertical roll. See Figure 5 for color cameras. The Wide Dynamic Range cameras use line lock adjustment buttons to adjust the vertical phase (see Figure 6).

Note If the phase cannot be adjusted to prevent picture roll, reverse the power polarity.

Adjusting the Backlight Compensation

The backlight compensation (BLC) adjusts the electronic shutter speed of the camera based on the light levels in specific areas of the scene. This adjustment provides better image quality for scenes that are unevenly lit.

To adjust the BLC, set the BLC switch to ON (see Figure 5 for color cameras). Center window weighted.

1.Slide the hinge towards the base until the screws align with the screw holes (see Figure 7).

2.Secure the cover in place.

Figure 7 Enclosure Cover Installation

Rev 1.01	10	Document 900.0275
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HD28C4HR9, HD28W4HR9, HD28D4HR6X, HD28W4HR6, HD28D4HR9 specifications

The Honeywell HD28 series of thermostatic products represents a significant advancement in home climate control technology. Among the models, the HD28W4HR6X, HD28C4HR6, HD28C4HR9X, HD28C4HR6X, and HD28W4HR9X showcase various features that cater to modern heating and cooling requirements.

One of the standout characteristics of these models is their compatibility with multi-stage heating and cooling systems. This versatility allows them to effectively manage the temperature in homes of all sizes, ensuring comfort throughout the year. The series typically features Wi-Fi connectivity, enabling remote monitoring and control via smartphones or tablets. This capability means users can adjust settings from anywhere, enhancing convenience and efficiency.

Integration with smart home ecosystems is another significant feature. The HD28 series often supports voice commands, allowing users to interact with their thermostats through popular virtual assistants. This hands-free operation simplifies daily adjustments, making it easier for families to maintain ideal temperatures without manual input.

Energy efficiency is a core focus of the Honeywell HD28 series, with many models equipped with adaptive technology. This innovation learns user behavior and optimizes heating and cooling cycles accordingly, reducing energy consumption and lowering utility bills. Additionally, these thermostats typically feature programmable scheduling, allowing users to set different temperature profiles for different times of day or week, contributing to further energy savings.

The user interface of the HD28 series is designed for ease of use, often featuring large, intuitive touchscreens that provide clear visibility of settings and schedules. Some models also include a customizable display, where users can select their preferred temperature readouts and modes.

Safety features are also integrated, with alerts for extreme temperature fluctuations that can indicate potential HVAC system issues or unsafe living conditions. With historical usage reports available, users can review their energy consumption patterns and adjust their habits for greater efficiency.

In summary, the Honeywell HD28 series offers innovative technologies and features that meet the demands of modern households, balancing comfort, convenience, and energy efficiency. Each model in the series is designed to provide effective temperature control while integrating seamlessly with contemporary smart home setups, making them an excellent choice for those looking to enhance their climate control systems.