LID Operation and Menus (Fig. 13-19)

GENERAL

·The LID display will automatically revert to the default screen after 15 minutes if no softkey activity takes place and if the chiller is not in the Pumpdown mode (Fig. 13).

·When not in the default screen, the upper right-hand cor- ner of the LID always displays the name of the screen that you have entered (Fig. 14).

·The LID may be con®gured in English or SI units, through the LID con®guration screen.

·Local Operation Ð By pressing the LOCAL softkey, the

PIC is now in the LOCAL operation mode. The control will accept changes to set points and con®gurations from the LID only. The PIC will use the Local Time Schedule to determine chiller start and stop times.

·CCN Operation Ð By pressing the CCN softkey, the PIC

is now in the CCN operation mode, and the control will accept modi®cations from any CCN interface or module (with the proper authority), as well as the LID. The PIC will use the CCN time schedule to determine start and stop times.

Fig. 13 Ð LID Default Screen

ALARMS AND ALERTS Ð Alarm (*) and alert (!) status are indicated on the Status tables. An alarm (*) will shut down the compressor. An alert (!) noti®es the operator that an un- usual condition has occurred. The chiller will continue to operate when an alert is shown.

Alarms are indicated when the control center alarm light

(!)¯ashes. The primary alarm message is viewed on the de- fault screen and an additional, secondary, message and troubleshooting information are sent to the Alarm History table.

When an alarm is detected, the LID default screen will freeze (stop updating) at the time of alarm. The freeze en- ables the operator to view the chiller conditions at the time of alarm. The Status tables will show the updated informa- tion. Once all alarms have been cleared (by pressing the

RESET softkey), the default LID screen will return to nor-

mal operation.

MENU STRUCTURE Ð To perform any of the operations described below, the PIC must be powered up and have suc- cessfully completed its self test. The self test takes place automatically, after power-up.

·Press QUIT to leave the selected decision or ®eld with- out saving any changes.

·Press ENTER to leave the selected decision or ®eld and save changes.

·Press NEXT to scroll the cursor bar down in order to

highlight a point or to view more points below the current screen.

·Press PREVIOUS to scroll the cursor bar up in order to highlight a point or to view points above the current screen.

· Press

SELECT

to view the next screen level (high-

lighted with the cursor bar), or to override (if allowable) the highlighted point value.

Fig. 14 Ð LID Service Screen

14

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Carrier 19XL specifications LID Operation and Menus Fig, General, Select
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19XL specifications

The Carrier 19XL is a highly regarded commercial heating and cooling solution, designed to provide optimum performance and energy efficiency in various applications. This rooftop unit is engineered to meet the diverse needs of businesses, making it an ideal choice for those requiring reliable climate control in their facilities.

One of the standout features of the Carrier 19XL is its advanced cooling and heating capabilities. The unit utilizes a high-efficiency scroll compressor that ensures a quieter operation and improved reliability. The system can operate across a wide range of temperatures, making it versatile for various climates. Additionally, it offers both cooling and heating options, allowing for year-round comfort.

Energy efficiency is a focal point of the 19XL design. With an impressive Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF), this unit not only helps reduce energy costs but also supports environmental sustainability initiatives. The unit is equipped with environmentally friendly refrigerants, further contributing to lower greenhouse gas emissions.

The Carrier 19XL features a user-friendly control system, allowing for easy monitoring and management of the unit's performance. This control system is designed to maximize energy savings, offering features such as demand control ventilation and integrated economizers that facilitate the use of outdoor air for cooling, reducing reliance on mechanical systems when conditions allow.

Construction-wise, the Carrier 19XL is built to withstand tough environmental conditions. Its robust cabinet is made from galvanized steel, providing durability and protection against the elements. The design also includes insulation to minimize noise levels, creating a more comfortable indoor environment.

Maintenance is a key consideration in the design of the 19XL. The unit features accessible service ports and a simplified access panel, allowing technicians to perform routine maintenance with ease. This proactive design helps ensure the longevity of the system and minimizes downtime, keeping operations running smoothly.

In summary, the Carrier 19XL is an exceptional choice for commercial heating and cooling needs. With its energy-efficient features, advanced technology, and durable construction, it stands out as a reliable solution for businesses looking for sustainable climate control options.
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