becomes brighter when a button is pressed. After 10 seconds of no button presses, the backlight will return to the dimmer level until another button press occurs. The range of brightness is 1 through 5 with 5 being full brightness.

Default is 3.

Option 19 — Dry Contact Configuration (programmable models only)

There are 2 available selections, OF and 1.

OF — The dry contact is always de−energized.

1 — The dry contact will be energized for the specified number of minutes per hour. This selection is programmable by period. When this selection is changed from OF to 1, the period icons are shown and the minute segments of the clock display are shown. The triangle icon next to the WAKE period will be on and a value between 0 and 60 will be shown in the minutes display. See Operational Information and Wiring Diagrams for further explanation of dry contact configuration and use. To change the period or minutes, press the soft key below the period or minutes and then use the UP/DOWN buttons to change to the desired value.

Default is OF (off).

Option 20 — Outdoor Air Temperature Offset Adjustment

This selection allows the calibration, or deliberate miscalibration of the outdoor air temperature sensor reading. The selection ranges from −5 to +5_.

Default is 0.

Option 21 — Keypad Lockout (programmable models only)

This selection allows the installer to limit access to the keypad. Selections are OF (off), 1, 2, 3.

OF (off) — The user has full access to the keypad.

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Carrier TP-PHP Option 20 Outdoor Air Temperature Offset Adjustment, Option 21 Keypad Lockout programmable models only

TP-PHP, TP-NHP, TP-NAC, TP-PAC specifications

Carrier TP-PAC, TP-NAC, TP-NHP, and TP-PHP are part of Carrier's advanced product lineup designed for efficient, reliable, and high-performance heating and cooling systems. These products cater to various applications, from commercial to industrial, ensuring optimal climate control while maximizing energy efficiency.

The TP-PAC (Packaged Air Conditioner) is engineered for easy installation and maintenance, providing robust performance in diverse settings. This unit features high-efficiency compressors and advanced refrigerant management technology, which reduces energy consumption while maintaining superior cooling capabilities. Its modular design allows for easy scalability, enabling businesses to adjust their cooling capacity as required. Moreover, the TP-PAC is equipped with an intelligent control system that monitors performance metrics in real-time, facilitating proactive maintenance and reducing downtime.

The TP-NAC (Air-Cooled Chiller) incorporates cutting-edge technology to enhance its operational efficiency. This chiller utilizes advanced variable-speed compressor technology, which adapts to varying load conditions, significantly reducing energy costs. Its environmentally friendly refrigerant options comply with the latest regulations, further enhancing its sustainability profile. The TP-NAC is perfect for applications that demand precise temperature control, making it ideal for data centers and manufacturing facilities.

The TP-NHP (Heat Pump) is designed for year-round climate control, capable of both heating and cooling. This versatile unit employs a new-generation hot gas reheat system, allowing it to maintain comfortable indoor temperatures even during extreme weather conditions. Additionally, the TP-NHP features advanced zoning capabilities, permitting customized temperature settings for different areas of a building. This flexibility not only enhances comfort but also optimizes energy expenditure.

The TP-PHP (Packaged Heat Pump) combines the efficiency of the TP-NHP with a compact design perfect for urban installations where space is limited. It boasts quiet operation, making it suitable for residential areas and noise-sensitive environments. The unit's smart technology features enable users to monitor and control their systems remotely, providing convenience and peace of mind.

In summary, Carrier's TP-PAC, TP-NAC, TP-NHP, and TP-PHP represent the forefront of heating and cooling technology. With their emphasis on efficiency, reliability, and cutting-edge features, these units are well-equipped to meet the demands of modern climate control in diverse applications. By prioritizing energy efficiency and sustainable practices, Carrier continues to lead the way in the HVAC industry, ensuring comfortable and environmentally friendly solutions for all users.