DISCHARGE

CYLINDER

 

OIL PRESSURE SWITCH AND

HIGH-

 

 

FAN CYCLING

DISCHARGE GAS

GAS THERMOSTAT

HEADS

 

CAPACITY CONTROL

PRESSURE

 

 

PRESSURE SWITCH

THERMOSTAT

 

 

 

 

PRESSURE SWITCH CAPILLARIES

MUFFLER SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PRESSURE RELIEF

SIGHT

RAIL

CRANKCASE

VALVE

GLASS

 

HEATER

NOTE: Units 38AH044-084 and 38AH124, 134 compressors are pan mounted. Units 38AH094 and 104 compressors are mounted on rails.

OIL

LOW-

SIGHT

MOUNTING

EQUALIZER

PRESSURE

GLASS

SPRING

LINE

SWITCH

 

(HIDDEN)

Fig. 29 Ð 06E Compressors, Typical

START-UP

Compressor crankcase heaters must be on for 24 hours before start-up. To energize the crankcase heaters, set the space thermostat above the ambient so there will be no de- mand for cooling. Close the ®eld disconnect and turn on the fan circuit breakers. Leave the compressor circuit breakers off/open. The crankcase heaters are now energized.

Preliminary Checks

8.If any leaks are detected, evacuate and dehydrate as pre- viously outlined in Step 3 Ð Make Refrigerant Piping Connections, page 14.

Preliminary Oil Charge Ð Each compressor is fac- tory charged with oil (see Table 3A, 3B, 4A, or 4B). When oil is checked at start-up, it may be necessary to add or re- move oil to bring it to the proper level. One recommended oil level adjustment method is as follows:

1.Ensure that compressor service valves are backseated.

2.Verify that each compressor on units 38AH044-084, 124, and 134 ¯oats freely on its mounting springs. Verify that each compressor on units 38AH094 and 104 ¯oats freely on its rails.

3.Check that electric power supply agrees with unit name- plate data.

ADD OIL Ð Close suction shutoff valve and pump down crankcase to 2 psig (14 kPa). (Low-pressure cutout must be jumped.) Wait a few minutes and repeat until pressure re- mains steady at 2 psig (14 kPa). Remove oil ®ll plug above the oil level sight glass, add oil through plug hole, and re- place plug. Run compressor for 20 minutes and check oil level.

4.Verify that compressor crankcase heaters are securely in place.

5.Check that compressor crankcase heaters have been on at least 24 hours.

6.Note that compressor oil level is visible in the sight glass.

7.Recheck for leaks using same procedure as previously out- lined in Step 3 Ð Make Refrigerant Piping Connections, page 14.

IMPORTANT: For units with 2 compressors per re- frigeration circuit, both compressors must be running to adjust the oil level. Two oil level equalizer lines between compressors distribute the oil to each compressor.

38

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Image 38
Carrier 38AH044-084 specifications Preliminary Checks, 06E Compressors, Typical
Page 37 Page 39

38AH044-084 specifications

The Carrier 38AH044-084 is an innovative air conditioning unit designed to provide efficient cooling solutions for residential and light commercial applications. This model is a part of Carrier's Aqua Series and is well-regarded for its combination of performance, energy efficiency, and innovative features.

One of the standout characteristics of the Carrier 38AH044-084 is its high-efficiency rating, which often exceeds the minimum efficiency standards set by the Department of Energy. Its Seasonal Energy Efficiency Ratio (SEER) rating is commendable, indicating significant energy savings over traditional air conditioning units. This efficiency translates to lower utility bills and a reduced carbon footprint, making it an environmentally friendly option.

In terms of technology, the Carrier 38AH044-084 is equipped with a modern scroll compressor. This type of compressor is known for its durability and quiet operation, contributing to a more pleasant indoor environment. The unit also incorporates advanced refrigerant technology, often using R-410A refrigerant, which is recognized for its lower environmental impact compared to older refrigerants like R-22.

The design of the 38AH044-084 focuses on ease of installation and maintenance. The compact footprint makes it suitable for various installation scenarios, whether on rooftops or ground levels. Additionally, the unit is engineered for durability, featuring weather-resistant components that can withstand harsh environmental conditions.

Another notable feature is the advanced airflow system, which ensures even distribution of cooled air throughout the space. This technology minimizes hot spots and enhances overall comfort. Furthermore, the unit supports a range of thermostatic controls, allowing users to customize their cooling experience according to their specific needs.

The Carrier 38AH044-084 is also designed with noise reduction in mind. Its sound-dampening technology helps minimize operational noise, making it a suitable choice for residential areas where noise levels are a concern.

In summary, the Carrier 38AH044-084 offers an excellent combination of energy efficiency, advanced technology, and user-friendly features. Whether for a home or a light commercial space, this unit provides reliable cooling performance while maintaining a focus on environmental responsibility and occupant comfort. With its robust design and innovative capabilities, it's a solid choice for those seeking effective and efficient air conditioning solutions.
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