Table 16 Ð Index of Lead/Lag Circuits and Compressors

UNIT

044-084

044-084

094

104

124

134

38AH

STD

OPT

 

 

 

 

LEAD CIRCUIT

A

A

A

A

Module

Module

124A

134A

Compressor, Lead

 

 

 

 

A1

A1

A1

A1

A1

A1

Compressor; Lag

*

A2

A2

A2

A2

A2

LAG CIRCUIT

B

²

B

B

Module

Module

124B

134B

Compressor, Lead

 

 

 

 

B1

 

B1

B1

A1

A1

Compressor; Lag

*

 

*

B2

A2

A2

LEGEND

OPT Ð Optional Single-Circuit Units STD Ð Standard Dual-Circuit Units *Circuit has only one compressor.

²Units have only one circuit.

Check Compressor Oil Level Ð After adjusting the refrigerant charge, allow each circuit to run fully loaded for 20 minutes. Running oil level should be 1¤8 to 1¤3 up on the sight glass. Stop the compressors at the ®eld power supply disconnect and check the crankcase oil level. Add oil only if necessary to bring the oil into view in the sight glass. If oil is added, run the circuit for an additional 10 minutes, then stop and check oil level. If the level remains low, check the piping system for proper design for oil return; also, check the system for leaks.

If the initial check shows too much oil (too high in the sight glass) remove oil to proper level. See Preliminary Oil Charge for proper procedure for adding and removing oil.

When the above checks are complete, repeat the proce- dure with the unit operating at minimum load conditions.

UNITS 38AH044-084,124, AND 134 Ð For this minimum load check, run the lead compressor of each refrigeration cir- cuit fully unloaded with the lag compressor not operating.

Unload the compressor(s) by turning the control set point adjustment nut counterclockwise until the adjustment nut stops. The unloader is now at 0 psig (0 kPag) set point. If

electrically actuated unloaders are installed, energize the so- lenoid to unload the compressor. Recheck the compressor oil level as described in Check Compressor Oil Level above.

Return unloader to original setting after checks are complete.

UNITS 38AH094,104 Ð For this minimum load check, the lead compressor (A1, B1) of each refrigeration circuit is un- loaded. See Table 16. The lag compressor (A2, B2 [38AH104 only]) of each refrigeration circuit must not be operating.

Unload the compressor(s) by turning the control set point adjustment nut counterclockwise until the adjustment nut stops. The unloader is now at 0 psig (0 kPag) set point. If electri- cally actuated unloaders are installed, energize the solenoid to unload the compressor.

Return unloader to original setting after checks are complete.

Final Checks Ð Ensure all safety controls are operat- ing, control panel covers are on, and the service panels are in place.

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Carrier 38AH044-084 Index of Lead/Lag Circuits and Compressors, 044-084 094 104 124 134 38AH, STD OPT Lead Circuit
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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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