PIN + ent

45 = TIMER CONTROL [ent] to Select

[ent] to Select 2=Holidays

[ent] to Select 2=Assign groups

STATUS A12345678

Groups YNYYYYYN

PIN + ent

45 = TIMER CONTROL [ent] to Select

[ent] to Select 3=Early Open

[ent] to Select 1=Early Times

Early Open

HH:MM

The groups that are affected by the programmed holiday period are assigned using the 2=Assign groups function.

On selecting the Assign Groups option, the groups currently assigned to the programmed holiday periods are indicated by a Y below the group; an N is displayed below the unassigned groups. All groups default to Y. Pressing the group number toggles the group status. When the required groups have been assigned to the holidays, press the ent key to accept the programming and return to the previous menu level.

NOTE: The Galaxy 3-520 has more than 8 groups; these are displayed on the keypad in blocks of eight groups. Press A or B keys to display each of the group blocks.

3=Early Open

If the Early Open option (45.3.2) is enabled, the Lockout OFF time for the following day is brought forward by the number of minutes (0 – 240) programmed by the engineer. This allows the system to be manu- ally unset earlier than normal. There are 2 functions within this option:

The 1=Early Times function displays the time that the system can be manually unset on the following day; this time is the Lockout OFF Time minus the Early Open period and is displayed in the 24 hour format.

If groups have been enabled, the early opening time for each of the groups enabled for early opening in the Early Open option can be viewed by pressing the A or B keys

This function only displays the early time if the Early Open option is enabled; if this option is disabled or if no groups have been enabled, the message NO ENTRIES is displayed.

The 2=Early Open function permits early opening to be disabled or enabled.

If groups have been enabled, then the groups can be individually ena- bled to permit early opening.

4=Timers

This option allows Timer A and Timer B to be switched on and off as required. If a Timer is set to off, the operation of the Timer is sus- pended; this option cannot be used to alter the programmed times. Both timers default to 0 = Off. To switch the timers on, select the required timer and change the setting to 1 =On.

27

Page 34 Page 36
Page 35
Image 35
Honeywell 3-520C, 3-48C, 3-144C manual =Early Open, =Timers
Page 34 Page 36

3-520, 3-48C, 3-144, 3-520C, 3-144C specifications

Honeywell has established itself as a leader in electronic control and automation, and their series of products, including the 3-520C, 3-520, 3-144C, 3-48C, and 3-144, exemplify the company's commitment to innovation and quality. These devices are primarily designed for use in climate control and industrial automation applications, providing reliable operation and advanced features.

The Honeywell 3-520C and 3-520 are versatile controllers known for their ability to manage complex HVAC systems effectively. They feature intuitive programming capabilities and user-friendly interfaces, which make them suitable for both novice and experienced users. The 3-520 model has a comprehensive set of inputs and outputs that allow for the precise control of various HVAC components. One of its key technologies is the use of PID control algorithms, which ensure optimal temperature regulation by continuously adjusting based on real-time feedback.

The Honeywell 3-144C and 3-144 models provide enhanced control solutions with a focus on energy efficiency and performance. The 3-144C boasts advanced diagnostics and monitoring capabilities that facilitate quick troubleshooting, while its built-in analytics tools help users optimize energy consumption. Both models support various communication protocols, enabling seamless integration with existing building management systems.

Another notable product in this lineup is the Honeywell 3-48C, which stands out for its compact design and robust performance. This model is particularly well-suited for smaller systems where space is limited. Despite its size, the 3-48C does not compromise on features; it offers precise temperature control, programmable settings, and compatibility with a variety of HVAC components.

The characteristics of these Honeywell controllers include durable construction, ensuring long service life even in demanding environments. They are designed to operate efficiently across a broad range of temperatures and conditions. Additionally, the user-friendly interface and programmable settings allow for tailored control strategies, improving overall system performance.

Overall, Honeywell’s 3-520C, 3-520, 3-144C, 3-48C, and 3-144 models highlight the company’s dedication to providing advanced technological solutions that cater to modern HVAC needs, prioritizing efficiency, reliability, and ease of use. As the industry continues to evolve, these controllers remain relevant by incorporating the latest in control technology, making them excellent choices for climate control applications.
Top Page Image Contents