Start-Up, Reassemble Indoor Unit, Using Vacuum Pump

HP ONLY

COOLING ONLY

A09545

Fig. 25 - Thermostat Wire Connection for 40QAC

Reassemble Indoor Unit

1.Reinstall filters and inlet grilles

2.Reinstall the side panels

START-UP

Preliminary Checks

1.Check condensate drainage system; on the opposite side of the drain connection, insert a water bottle up into the fan coil unit and fill the drain pan (see Fig. 27). Water must flow steadily; if not, check the pipe slope or inspect for any pipe restrictions.

A09538

Fig. 27 - Inserting Water Into Drain Pan

2.Make sure all wiring connections are correct and they are tight.

3.Field electrical power source must agree with unit name plate rating.

4.Check that all barriers, covers, and panels are in place. En- sure that the filters and return-air grilles on the indoor unit have been installed and that the discharge louvers are posi- tioned correctly.

5.All service valves must be closed.

6.On units with crankcase heaters, ensure belly-band heaters are tight around the compressor.

Heating Only

Fig. 26 - Thermostat Wire Connection for 40QAQ

Evacuate and Dehydrate the System

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Never use the system compressor as a vacuum pump.

Using Vacuum Pump

1.Completely tighten flare nuts A, B, C, D, connect manifold gage charge hose to a charge port of the low side service valve. (See Fig. 28.)

2.Connect charge hose to vacuum pump.

3.Fully open the low side of manifold gage. (See Fig. 29.)

4.Start vacuum pump

5.Evacuate using either deep vacuum or triple evacuation method.

6.After evacuation is complete, fully close the low side of manifold gage and stop operation of vacuum pump.

7.The factory charge contained in the outdoor unit is good for up to 25 ft. (8 m) of line length. For refrigerant lines longer than 25 ft (8 m), add 0.3 oz. per foot of extra piping up to the maximum allowable length.

8.Disconnect charge hose from charge connection of the low side service valve.

9.Fully open service valves B and A.

10.Securely tighten caps of service valves.

Outdoor Unit

Refrigerant

Indoor Unit

A Low Side

B High Side

Service Valve

A07360

Fig. 28 - Service Valve

40QAC/38HDR -- 40QAQ/38QRR

40QAC specifications

The Carrier 40QAC is a standout product in the realm of commercial air conditioning systems. This air-cooled chiller is designed to meet a variety of cooling needs while ensuring energy efficiency and reliability. One of the most notable features of the 40QAC is its advanced scroll compressor technology, which is engineered to provide consistent performance with reduced noise levels. This makes it an ideal choice for applications where minimizing sound pollution is crucial, such as in urban settings or near sensitive environments.

In terms of energy efficiency, the 40QAC boasts impressive ratings, with a high coefficient of performance (COP) that helps to lower operational costs and reduce environmental impact. Its design integrates various energy-saving features, including variable speed fans and a robust control system that optimizes performance based on real-time demand. This adaptability allows the chiller to maintain comfort levels while consuming less energy than traditional models.

The 40QAC is equipped with a microprocessor-based control system that simplifies operation and enhances user experience. This intelligent control interface allows operators to monitor performance metrics, adjust settings, and troubleshoot any issues remotely, increasing overall system reliability. The system is also designed to be compatible with building management systems, which facilitates seamless integration into existing infrastructure.

Another prominent characteristic of the Carrier 40QAC is its robust construction. Built with high-quality materials, it offers excellent durability and longevity, even in challenging environmental conditions. The unit also incorporates features to streamline maintenance, such as accessible component layout and easy-to-remove panels, ensuring that downtime for servicing is minimized.

Safety is another critical aspect of the Carrier 40QAC’s design. It’s engineered with numerous safety protocols to protect against overheating, overpressure, and other potential hazards, guaranteeing both system integrity and peace of mind for operators.

Overall, the Carrier 40QAC is a versatile and efficient solution for commercial cooling needs. With its technological advancements, energy-saving features, and robust design, it stands out as a reliable choice for businesses looking to balance performance with sustainability. The 40QAC not only promises efficient cooling but does so while aligning with the growing demand for eco-friendly solutions in today's marketplace.