7. AIR PURGING

Air and moisture in the refrigerant system may have undesirable effects as indicated below.

pressure in the system rises

operating current rises

cooling (or heating) efficiency drops

moisture in the refrigerant circuit may freeze and block capillary tubing

water may lead to corrosion of parts in the refrigerant system

Therefore, the indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated to remove any noncondensables and moisture from the system.

Air Purging with a Vacuum Pump (for Test Run) Preparation

Check that each tube (both liquid and gas tubes) between the indoor and outdoor units has been properly connected and all wiring for the test run has been completed. Remove the valve caps from both the gas tube and liquid tube service valves on the outdoor unit. Note that both liquid and gas tube service valves on the outdoor unit are kept closed at this stage.

Manifold gauge

Fig. 7-1

Vacuum pump

Outlet

Inlet

Fig. 7-2

Manifold valve

Leak test

(1)Attach a manifold valve (with pressure gauges) and dry nitrogen gas cylinder to this service port with charge hoses.

CAUTION

Use a manifold valve for air

purging. If it is not available, use

 

 

 

a stop valve for this purpose. The

 

“Hi” knob of the manifold valve

 

must always be kept closed.

(2)Pressurize the system to no more than

512 psig (36 kgf/cm2G) with dry nitrogen gas and close the cylinder valve when the gauge reading reaches 512 psig (36 kgf/cm2G). Then, test for leaks with liquid soap.

CAUTION

To avoid nitrogen entering the

refrigerant system in a liquid state,

 

 

 

the top of the cylinder must be

 

higher than the bottom when you

 

pressurize the system. Usually,

 

the cylinder is used in a vertical

 

standing position. (Refer to the

 

previous page.)

Pressure gauge

Gas tube

Liquid tube

Lo Hi

Charge hose

Cylinder valve

Nitrogen gas cylinder (In vertical standing position)

Service port ø5/16"

Open

Close

Outdoor unit

Open

Close

Fig. 7-3

65

Page 65
Image 65
Sanyo 85464359981002 installation instructions AIR Purging

85464359981002 specifications

The Sanyo 85464359981002 is a versatile and innovative product that has garnered attention in its respective market for its blend of performance, efficiency, and advanced technology features. This product is designed to cater to the demanding needs of consumers who prioritize quality and functionality in their daily lives.

One of the standout features of the Sanyo 85464359981002 is its energy efficiency. It is engineered to operate with minimal energy consumption while still delivering exceptional performance. This aspect is particularly significant given the growing concerns regarding energy usage and environmental sustainability. The model incorporates state-of-the-art technologies that optimize power usage without compromising on functionality.

The design of the Sanyo 85464359981002 focuses on user-friendliness and convenience. This product is equipped with an intuitive interface that makes it simple for users of all experience levels to operate and adjust settings as needed. Additionally, the lightweight construction enhances portability, allowing for easy transportation from one location to another.

Another notable characteristic is the advanced materials used in its construction. The Sanyo 85464359981002 is built to withstand the rigors of everyday use, ensuring durability and longevity. This quality makes it a smart investment for consumers looking for a reliable solution that won't require frequent replacements.

Connectivity is also a key feature of the Sanyo 85464359981002. It includes multiple ports and connectivity options that allow users to integrate the product with a variety of devices. This versatility enables seamless interaction with smartphones, tablets, and other technologies, ensuring that the Sanyo 85464359981002 can adapt to different environments and user needs.

The performance capabilities of the Sanyo 85464359981002 are impressive, emphasizing precision and speed. Whether it's delivering high-quality output or ensuring rapid operation, this product stands out in its field. These performance enhancements are supported by advanced technology that streamlines processes and improves overall productivity.

In conclusion, the Sanyo 85464359981002 exemplifies a well-rounded product that embodies modern design, energy efficiency, durability, and adaptability. Its array of features and advanced technologies makes it an attractive choice for consumers seeking quality and reliable performance in their daily routines.