898841-UIM-B-0113

Action

Shut-off

Suction/Vapor

2-way Valve

2-way Service Valve

 

 

CLOSED

 

Evacuating with a

 

 

vacuum pump

 

 

FULLY

OPEN

Outdoor unit running

FULLY

OPEN

Checking pressure and adding refrigerant

SUCTION/VAPOR

HOSE WITH 2-WAY SERVICE VALVE SCHRADER VALVE

PUSH

REQUIRES FIELD PROVIDED 5/16” FEMALE

FLARE TO 1/4” MALE FLAREADAPTER.

VALVE CAP

OPEN POSITION

 

FLARE CAP

 

 

CLOSED POSITION

 

SCHRADER CORE

TO LINE SET

SERVICE

 

 

PORT

 

SERVICE

 

PORT CAP

TO OUTDOOR UNIT

FLARE CAP

 

 

ALLEN WRENCH (5MM)

 

OPEN POSITION

TO LINE SET CLOSED POISTION

TO OUTDOOR UNIT

FIGURE 38: Service Valve Operation

LEAK TEST AND EVACUATION

Air and moisture remaining in the refrigerant system will have undesir- able effects as indicated below:

1.Pressure in the system rises.

2.Operating current rises.

3.Cooling or heating efficiency drops.

4.Moisture in the refrigerant circuit may freeze and block capillary tubing (30 kBtu size only).

5.Water may lead to corrosion of parts in the refrigeration system.

The line set between the indoor and outdoor units must be leak tested and evacuated to remove any non-condensable and moisture from the system.

AIR PURGING WITH VACCUM PUMP

COMPOUND

PRESSURE

GAUGE

-101kPa (-76cmHg)

HANDLE LOW

CHARGE HOSE

CONNECTING

PIPE

PACKED VALVE

AT LIQUID SIDE

PRESSURE GAUGE

MANIFOLD VALVE

HANDLE HIGH (KEEP FULL CLOSED)

CHARGE HOSE

VACUUM PUMP

ADAPTER FOR

COUNTER-FLOW

PREVENTION

VACUUM

PUMP

Be sure to use a vacuum pump with counter-flow prevention function to make oil inside the pump does not flow back into the system pipes when the pump stops.

1.Run the vacuum pump.

2.Connect the charge hose from the manifold valve to the service port of the gas side packed valve.

3.Connect the charge hose to the port of the vacuum pump.

4.Open fully the low pressure side handle of the gauge manifold valve.

5.Operate the vacuum pump to begin evacuating.

6.The operation time for evacuation varies with the lineset length and capacity of the pump. Allow the pumpto operate until the system has been evacuated downto 300 microns. Allow the pump to con- tinue running foran additional 15 minutes.

7.Turn off the pump and leave the connection secured to the suction/ vapor 2-way service port. After five minutes, if the system fails to hold 500 microns or less, check all connections for tight fit and repeat the evacuation procedure.

8.Close the low pressure valve handle of gauge manifold.

9.Open fully the valve stem of the packed valves (both gas and liquid sides).

10.Remove the charging hose from the service port.

11.Securely tighten the caps on the packed valves.

PACKED VALVE AT GAS SIDE

SERVICE PORT

SCHRADER CORE

FIGURE 39: Gauge Set Connections for Test Leaks, Evacuation Charging

ADDING REFRIGERANT FOR LONGER LINE SET

1.Open the low side manifold gauge valve and weigh in liquid refriger- ant. Use Table 6 to calculate the correct weigh-in charge.

2.Close manifold gauge valves.

LEAK TEST

Use the following procedure to test for system leaks:

1.Connect the manifold gauge set and dry nitrogen gas cylinder to the suction/vapor service port. See Figure 30.

2.Open valve on nitrogen cylinder.

3.Pressurize the system to no more than 150 PSIG with dry nitrogen.

4.Check for leaks using soapy water.

5.After the system is found to be free of leaks:

Close valve on nitrogen cylinder

Relieve the nitrogen pressure by: loosening the charge hose con- nector at the nitrogen cylinder.

When the system pressure is reduced to normal, disconnect the hose from the cylinder.

Johnson Controls Unitary Products

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Johnson Controls 22 SEER Leak Test and Evacuation, AIR Purging with Vaccum Pump, Adding Refrigerant for Longer Line SET

22 SEER specifications

Johnson Controls has long been a leader in the heating, ventilation, and air conditioning (HVAC) industry, consistently pushing the boundaries of energy efficiency and comfort. One of their standout offerings is the 22 SEER (Seasonal Energy Efficiency Ratio) air conditioning system, which boasts advanced technologies designed to deliver optimal performance while minimizing energy consumption.

At the heart of the Johnson Controls 22 SEER system is its innovative compressor technology. The variable-speed compressor allows for precise temperature control by adjusting the cooling output according to the specific demands of your space. This means that instead of constantly turning on and off, the system can operate at lower speeds for longer periods, ensuring even cooling and reducing energy bills.

In addition to the compressor, the 22 SEER unit employs high-efficiency coils and a superior refrigeration system that work in tandem to enhance performance. These components are designed to maximize heat transfer, enabling the system to cool your home more effectively and efficiently.

Another notable feature of the Johnson Controls 22 SEER system is its smart technology integration. With a focus on convenience and energy management, these units often come equipped with Wi-Fi connectivity, allowing homeowners to control their HVAC systems remotely using a smartphone app. This capability enhances user experience by enabling real-time monitoring and scheduling, ultimately leading to smarter energy use.

The design of the units also reflects an emphasis on quiet operation. Noise reduction technologies, including sound-dampening features, ensure that the system operates quietly in the background, enhancing indoor comfort without disruptive sounds.

Durability is another standout characteristic of the Johnson Controls 22 SEER systems. These units are built with high-quality materials and rigorous testing standards, ensuring they can withstand harsh weather conditions and provide reliable performance over the years.

Moreover, the 22 SEER air conditioning systems contribute to environmental sustainability. By using less energy, they not only lower utility costs but also reduce the carbon footprint of homes, aligning with growing consumer preferences for eco-friendly solutions.

Overall, the Johnson Controls 22 SEER air conditioning system represents a significant leap forward in HVAC technology. Its blend of efficiency, innovative features, and user-friendly technologies makes it an ideal choice for environmentally-conscious homeowners seeking comfort without compromise. Whether upgrading an existing system or investing in a new one, the 22 SEER unit stands out as a prime example of luxury, efficiency, and sustainability in the HVAC market.