Capacity Control — Unit 38AKS012 Only — A suction pressure-actuated unloader controls 2 cylinders and provides capacity control. Unloaders are factory set (see Table 1A or 1B), but may be field adjusted as follows:

CONTROL SET POINT (cylinder load point) is adjustable from 0 to 85 psig (586 kPa). To adjust, turn control set point adjustment nut (Fig. 14) clockwise to its bottom stop. In this position, set point is 85 psig (586 kPa). Then, turn adjustment counterclockwise to desired control set point. Every full turn counterclockwise decreases set point by 7.5 psig (51.7 kPa).

PRESSURE DIFFERENTIAL (difference between cylinder load and unload points) is adjustable from 6 to 22 psig (41.4 to 152 kPa). To adjust, turn pressure differential adjustment screw (Fig. 14) counterclockwise to its back stop position. In this position, differential is 6 psig (41.4 kPa). Then, turn adjust- ment clockwise to desired pressure differential. Every full turn clockwise increases differential by 1.5 psig (10.3 kPa).

NOTE: Fan height adjustments are as follows:

UNIT

in.

mm

38AK007 (60 Hz)

4.50

114

All 50-Hz Units

 

 

All 60-Hz Units

6.42

163

(Except 38AK007)

 

 

Fig. 13 — Condenser-Fan Adjustment

Fig. 14 — Compressor Capacity Control Unloader

Compressor Removal — See Tables 1A and 1B for compressor information. Follow safety codes and wear safety glasses and work gloves.

1.Shut off power to unit and tag disconnect. Remove unit access panel (front of unit).

2.Remove refrigerant from system using refrigerant remov- al methods described in the Carrier GTAC-II, Module 5, Charging, Recovery, Recycling, and Reclamation.

3.Disconnect compressor wiring at compressor terminal box.

4.Remove bolts from suction flange and discharge service valves (38AKS008,009,012 units only). Loosen sweat connections (38AK007,008, and 012 units only).

Excessive movement of copper lines at compressor may cause higher levels of vibration when unit is restored to service.

5.Remove crankcase heater from compressor base (38AKS008,009,012, 38AK008,012).

6.Remove compressor holddown bolts.

7.Remove compressor from unit.

8.Clean system. Add new liquid line filter drier.

9.Install new compressor in unit.

10.Connect suction and discharge lines to compressor, as applicable. Ensure that compressor holddown bolts are in place.

11.Connect wiring.

12.Install crankcase heater on 38AKS008,009,012 and 38AK008,012 units.

13.Evacuate and recharge unit.

14.Restore unit power.

Crankcase Heater (Except 38AK007) — The crank- case heater on the 38AK008,012 condensing units prevents refrigerant migration and compressor oil dilution during shut- down when compressor is not operating.

Close both compressor service valves if applicable (on 38AKS008,009,012) when crankcase heater is deenergized for more than 6 hours.

12

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Carrier 38AK007, 38AKS012, 38AKS009, 38AKS008, 38AK008, 38AK012 specifications Condenser-Fan Adjustment
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38AK012, 38AKS009, 38AKS012, 38AKS008, 38AK008 specifications

The Carrier 38AK007 is a state-of-the-art air conditioning system designed for optimal comfort, efficiency, and reliability, making it a standout choice for residential and commercial applications. This model exemplifies Carrier's commitment to innovation and energy efficiency, catering to diverse cooling needs.

One of the key features of the Carrier 38AK007 is its high energy efficiency ratio (EER), which ensures lower energy consumption and reduced utility bills. With advanced inverter technology, this unit adjusts its cooling output based on the current requirements, thereby minimizing energy waste. This makes it an environmentally friendly option, contributing to lower greenhouse gas emissions while providing effective cooling.

The Carrier 38AK007 is also equipped with a variable-speed compressor, which enhances its performance and reliability. The compressor operates at different speeds, allowing the system to maintain a consistent room temperature without the peaks and valleys associated with traditional systems. This ensures not only increased comfort but also quieter operation, making it ideal for homes, offices, and other noise-sensitive environments.

In terms of technological innovation, the Carrier 38AK007 features Smart Thermostat compatibility, allowing users to control their cooling settings remotely via a smartphone or tablet. This integration with smart home systems provides users with added convenience, enabling them to adjust temperature settings from anywhere, ensuring optimal comfort even before arriving home.

The model is built with a robust and durable construction, featuring weather-resistant materials that withstand various environmental conditions. This durability ensures a long lifespan, reducing the frequency and costs of maintenance. Additionally, the Carrier 38AK007 includes a multi-stage filtration system that effectively captures allergens and pollutants from the indoor air, improving overall air quality.

Overall, the Carrier 38AK007 is designed to meet the modern demands for energy efficiency, user control, and durability. Its combination of advanced technologies, such as inverter technology and smart home compatibility, along with high performance and air quality features, makes it an excellent choice for anyone looking to invest in a reliable cooling solution. Whether for a residential setting or a commercial space, the Carrier 38AK007 stands out as a leader in the air conditioning market.
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