8.Reinstall all 6 wire connectors and the green ground wire.

9.Carefully check all wiring connections before restoring power.

10.Verify the LOCAL/ENABLE-STOP-CCN switch is in STOP position

11.Restore control power. Verify the red and green lights on top of PSI0 and front of each DSIO module re- spond as described in Control Modules section on page 64. The keypad and display module @IS10 or LID) should also begin its rotating display.

12.Using the keypad and display module, press [p-&q,to verify that the software version number matches the ER (engineering requirement) number shown on the PSI0 label.

13.Press [qnSRVC to verify that the 6 factory configuration

codes (CODE 1 through CODE 6) exactly match the codes listed for this unit model on the component ar- rangement label diagram on the control box door. If they are different or are all zeros, reenter the 6 codes. If any changes are required, the PSI0 display becomes

blank and reconfigures itself after pressing the H key

while displaying CODE 6. The display returns in ap- proximately 15 seconds.

NOTE: Codes with leading zeros in the configuration will be displayed starting with the first number greater than zero.

14.Press nn4 sRvc to verify each item is configured as needed

for this particular installation. Table 9 shows the fac- tory configuration code default settings. Table 9 also shows the service replacement code default settings which are used if no model number was specified when or- dering the replacement PSI0 module. It is strongly sug-

gested that the Start-Up Checklist for Flotronic’” II Chiller Systems (completed at time of original start-up) be used at this time to verify and/or reprogram the various op- tions and configurations required for this job.

15.After completing the configuration steps outlined above, restore main power and perform a unit test as de-

scribed in m H and r;lFl sections on page 38.

16, Complete this procedure and restore chiller to normal operation by returning the LOCAL/ENABLE-STOP- CCN switch to desired position.

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Carrier 040-420 specifications
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040-420 specifications

The Carrier 040-420 is a highly regarded commercial HVAC unit specifically designed for efficient heating and cooling in medium- to large-sized buildings. Known for its reliability and advanced technology, this system is ideal for a variety of applications ranging from offices to industrial spaces.

One of the main features of the Carrier 040-420 is its energy efficiency. The unit utilizes advanced compressors and a high-efficiency heat exchanger, which work together to minimize energy consumption while maximizing performance. This is crucial in today’s energy-conscious environment, as businesses strive to reduce operational costs and their carbon footprint. The unit also boasts a high SEER (Seasonal Energy Efficiency Ratio) rating, making it an attractive option for those looking to lower their utility bills.

Equipped with advanced inverter-driven technology, the Carrier 040-420 allows for precise control of indoor climate conditions. This means that the system can adjust its output according to the actual cooling or heating demand of the space, resulting in enhanced comfort and reduced energy waste. The inverter technology also contributes to quieter operation, allowing for a more pleasant indoor environment.

Another feature that sets the Carrier 040-420 apart is its smart controls. The unit can be integrated with Carrier’s Building Automation Systems, enabling remote monitoring and management. This allows facility managers to optimize energy use and immediately respond to any performance issues. Additionally, the unit is compatible with various control interfaces, making it easy for users to adjust settings or schedule operations according to the building's occupancy patterns.

The robust design of the Carrier 040-420 ensures longevity and durability, even in harsh environmental conditions. Its weatherproof casing protects the internal components, enhancing the unit's performance and reliability over time. Maintenance is simplified with accessible design features, allowing technicians to conduct service checks and repairs without extensive downtime.

Overall, the Carrier 040-420 stands out as a modern HVAC solution that combines energy efficiency, advanced technologies, and user-friendly features. Its commitment to performance and sustainability makes it an ideal choice for businesses looking to enhance comfort while being mindful of their energy consumption. With its blend of innovation and reliability, the Carrier 040-420 continues to be a preferred option in the commercial HVAC market.
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