Evacuate and Dehydrate the System | Toshiba RAV-SP180AT2-UL instruction

Outdoor Unit

Installation Manual

8 EVACUATE AND DEHYDRATE THE SYSTEM

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Never use the system compressor as a vacuum pump.

5.Evacuate using either deep vacuum or triple evacuation method.

6.After evacuation is complete, fully close the low side of manifold gage and stop operation of vacuum pump.

Refrigerant tubes and indoor heat exchanger should be evacuated using the recommended deep vacuum method of 500 microns. The alternate triple evacuation method may be used if the procedure outlined below is followed. Always break a vacuum with dry nitrogen.

SYSTEM VACUUM AND CHARGE

Using Vacuum Pump

1.Completely tighten flare nuts A, B, C, D, connect manifold gage charge hose to a charge port of the low side service valve.

Service Valve

Outdoor Unit		Refrigerant	Indoor Unit
Outdoor Unit	A	Low Side	C
	A	Low Side	C


	B	High Side	D
Service Valve

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gage capable of accurately measuring this vacuum depth. The deep vacuum method is the most positive way of assuring a system is free of air and liquid water.

Deep Vacuum Graph

	5000
	4500
	4000
	3500							LEAK IN
	3500							SYSTEM
MICRONS								SYSTEM
	3000
	2500
	2000
	1500					VACUUM TIGHT
						VACUUM TIGHT

							TOO WET
	1000
	500						TIGHT DRY
	500						SYSTEM
							SYSTEM
	0	1	2	3	4	5	6	7
			MINUTES

2.Connect charge hose to vacuum pump.

3.Fully open the low side of manifold gage.

Manifold

Manifold Gage

500 microns

Low side valve

High side valve

Charge hose

Vacuum pump

Packed valve at gas side

Charge port

(Valve core (Setting pin))

4. Start vacuum pump.

Triple Evacuation Method

The triple evacuation method should only be used when vacuum pump is only capable of pumping down to 28 in. of mercury vacuum and system does not contain any liquid water.

Refer to “Triple Evacuation Method chart” and proceed as follows:

1.Pump system down to 28 in. of mercury and allow pump to continue operating for an additional 15 minutes.

2.Close service valves and shut off vacuum pump.

3.Connect a nitrogen cylinder and regulator to system and open until system pressure is 2 psig.

4.Close service valve and allow system to stand for 1 hr. During this time, dry nitrogen will be able to diffuse throughout the system absorbing moisture.

5.Repeat this procedure as indicated in the chart. System will then be free of any cotaminants and water vapor.

15-EN

– 15 –

RAV-SP180AT2-UL specifications

The Toshiba RAV-SP180AT2-UL is an innovative ducted air conditioning unit designed to deliver exceptional cooling and heating capabilities for both residential and commercial applications. Known for its efficiency and performance, this model integrates advanced technology that ensures optimal indoor climate control.

One of the primary features of the RAV-SP180AT2-UL is its energy efficiency. It operates with a high Energy Efficiency Ratio (EER) and Seasonal Energy Efficiency Ratio (SEER) ratings, allowing it to consume less electricity while providing maximum comfort. This efficiency not only contributes to lowering energy bills but also promotes environmentally friendly practices by reducing carbon emissions.

The air conditioning unit is equipped with Toshiba’s advanced inverter technology. This technology allows for precise temperature control and significant energy savings by continuously adjusting the compressor speed based on the desired temperature. With this capability, the system can operate quietly and maintain a stable climate, avoiding the sharp temperature fluctuations characteristic of traditional fixed-speed units.

Another significant feature of the RAV-SP180AT2-UL is its compact design, making it suitable for installation in various settings, including small apartments and larger commercial spaces. Its ducted system enables seamless air distribution, reducing visible components and maintaining the aesthetic of the interior space.

The unit also incorporates innovative filtration systems that improve indoor air quality. With advanced air purifying filters, it effectively minimizes allergens, dust, and pollutants, ensuring that the air circulated in the space is clean and healthy.

In terms of control, the RAV-SP180AT2-UL is compatible with a range of smart control options. Users can manage settings remotely via applications or programmable timers, allowing for convenience and the possibility of scheduling cooling and heating cycles according to personal routines.

Overall, the Toshiba RAV-SP180AT2-UL combines efficiency, compact design, and advanced technology, making it a strong contender in the ducted air conditioning market. Its ability to provide comfortable air conditioning solutions while being mindful of energy consumption is a testament to Toshiba's commitment to innovation in climate control technology.