This article explains how to complete the air evacuation and bleed the circuit for outdoor units.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to complete the air evacuation and bleed the circuit for outdoor units.&#xA0;</p><p>The air and/or humidity left inside the refrigeration circuit can contaminate the refrigerant and cause abnormal spikes in pressure, leading to eventual compressor malfunctions. Therefore, after connecting the indoor and outdoor units to create a closed system, it is necessary to bleed the air and humidity out of the circuit by using a vacuum pump.&#xA0;</p><p>Perform the evacuation after the initial installation or when the unit is relocated. For first time installations, do not prematurely release the refrigerant prior to evacuation. Keep the valve caps sealed.&#xA0;</p><p id="isPasted">This article is for the following systems:&#xA0;</p><ul><li>Diamante Essenza (WYT-17)</li><li>Diamante Pro (WYT-20)</li><li>Quantum Ultra High-Wall (WYT-24)</li><li>Quantum Hyperformance (WYT-25)</li><li>Quantum Fresh (WYT-FA)</li><li>Quantum Ultra Ceiling Cassette (CYT-24)</li><li>Quantum Ultra Floor-Ceiling Flex (UYT-24)</li><li>Quantum Ultra Ducted Ceiling Concealed (RYT-24)</li></ul><h2 id="before-performing-the-evacuation"><u>Before Performing the Evacuation</u></h2><p>Check to make sure that both the high-pressure and low-pressure pipes between the indoor and outdoor units are connected properly.&#xA0;</p><p>Check to make sure all wiring is connected properly and is fully enclosed and insulated.&#xA0;</p><h2 id="steps"><u>Steps</u></h2><p>Follow these steps to complete the air evacuation and bleed the circuit:&#xA0;</p><ol><li>Remove the caps from the 2-way and 3-way valves. Do not manipulate the valves until step 11.&#xA0;</li><li>Unscrew and remove the cap from the service port.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120415-c724d09c-2414-4007-8f04-65804fd82340-wyt17_air_evacuation_step1&amp;2.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"></li><li>Connect the blue (low) hose of the manifold gauge to the service port on the outdoor unit&apos;s 3-way valve. Use an adapter if needed. Ensure that the pin fully engages the Schrader valve.&#xA0;</li><li>Connect the yellow (middle) hose from the manifold gauge to the vacuum pump.&#xA0;</li><li>Open the low pressure valve of the manifold gauge. Keep the high pressure valve closed.<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120415-c3c3a9ba-d373-409f-8557-e67d484d1b81-wyt17_air_evacuation_steps3-5.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"></li><li>&#xA0;Turn on the vacuum pump to evacuate the system.&#xA0;</li><li>Run the vacuum for at least 15 minutes or until the compound meters reads -76cmHG (-100kPa or -30 inHg). The vacuum reading should gradually decrease.&#xA0;</li><li>Close the low pressure side of the manifold gauge and turn off the vacuum pump.&#xA0;</li><li>For the best results, wait for at least 1 hour, then verify that there has been no increase in the vacuum reading.&#xA0;</li><li>If there is no change in the vacuum reading, unscrew the cap from the service valve (high pressure valve). <strong>Note:</strong> If there is a rise in the system vacuum, refer to this Gas Leak Check article.&#xA0;</li><li>Insert the Allen wrench into the service valve (2-way valve) and open the valve by turning the wrench in a 1/4 counterclockwise turn. Wait and listen for gas potentially exiting the system, then close the valve after 5 seconds.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120415-3571cbda-89b1-484a-b2f9-ea0a2c718c8c-wyt17_air_evacuation_steps11.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"><ul><li><strong>Notes:&#xA0;</strong><ul><li>When opening valve stems, turn the supplied Allen wrench until the valve stem comes into contact with the stopper. Do not try to force the valve to open further.</li><li>Do not open either of these valves until evacuation steps are completed and the system is ready for startup.&#xA0;</li></ul></li></ul></li><li>Watch the pressure gauge for a few minutes to make sure that there is no drop in pressure. The pressure gauge should now show higher than the atmospheric pressure.&#xA0;</li><li>Remove the charge hose from the service port.</li><li>Use a hexagonal wrench to fully open both the high pressure and low pressure valves counterclockwise.<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120415-25e50631-8526-4323-a1c6-7d1eac456d3a-wyt17_air_evacuation_step14.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"></li><li>Tighten valve caps on all three valves (service port, high pressure, low pressure) by hand. Tighten further using a torque wrench if needed.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120415-1e70c1c7-b2fa-42ef-a1f7-e97088c0a10e-wyt17_air_evacuation_step15.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"></li></ol>

Air Evacuation and Bleeding the Circuit

This article explains how to connect the power/signal electrical wiring to outdoor units.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to connect the power/signal electrical wiring to outdoor units.&#xA0;</p><p>A comprehensive wiring diagram is printed on the inside of the wiring cover.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120320-fee6f847-17b7-41fa-a74f-706d9fa0a44d-wyt17_odu_electrical_wiring.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></p><p>This article is for the following articles:</p><ul id="isPasted"><li>Diamante Essenza (WYT-17)</li><li>Diamante Pro (WYT-20)</li><li>Quantum Ultra High-Wall (WYT-24)</li><li>Quantum Hyperformance (WYT-25)</li><li>Quantum Fresh (WYT-FA)</li><li>Quantum Ultra Ceiling Cassette (CYT-24)</li><li>Quantum Ultra Floor-Ceiling Flex (UYT-24)</li><li>Quantum Ultra Ducted Ceiling Concealed (RYT-24)</li></ul><h2 id="isPasted"><u>Connect the Signal Cable</u></h2><p>The indoor and outdoor units each have three terminals (1, 2, 3) and ground wiring (G). Match the terminals number to number. Color selection does not matter as much as matching number to number does.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120218-43815c26-9bed-46ff-aead-29633f2eeab1-wytfa_connect_signal_cable.png" style="width: 300px;" class="fr-fic fr-bordered fr-dib"></p><p>Do not mix up the wires between each ends. &#xA0;</p><p>Consult the diagrams affixed to the indoor and outdoor units respectively for specific wiring instructions.&#xA0;</p><h2 id="steps"><u>Steps</u></h2><p>Follow these steps to connect the power/signal electrical wiring to the outdoor unit:</p><ol><li>Unscrew and remove the handle on the right side plate of the outdoor unit.&#xA0;</li><li>Wire the system using the appropriate gauge wire and the wiring diagram found on the handle cover. For information on the appropriate gauge wire to use, click <a href="https://help.pioneerminisplit.com/en-US/articles/cable-wire-specifications-352513" target="_blank" rel="noopener noreferrer">here</a>.&#xA0;</li><li>Use a proper flexible rain-tight conduit with appropriate size connectors.&#xA0;</li><li>Fasten the power connection wires into place using the supplied wire clamps.&#xA0;</li><li>Check the wiring against the diagram to ensure it is wired correctly. A proper ground connection must be established.&#xA0;</li><li>Rescrew and reinstall the cover handle.&#xA0;</li></ol>

Connect the Power/Signal Electrical Wiring to Outdoor Units

This article explains how to connect the refrigerant piping to the outdoor unit.

Connect the Refrigerant Piping to the Outdoor Unit

This article explains how to mount outdoor units.

Mount the Outdoor Unit

This article explains how to select the installation location for outdoor units.

<h2 id="isPasted"><u>Introduction</u></h2><p>This article explains how to select the installation location for outdoor units.&#xA0;</p><p>This article is for the following systems:&#xA0;</p><ul><li>Diamante Essenza (WYT-17)</li><li>Diamante Pro (WYT-20)</li><li>Quantum Ultra High-Wall (WYT-24)</li><li>Quantum Hyperformance (WYT-25)</li><li>Quantum Fresh (WYT-FA)</li><li>Quantum Ultra Ceiling Cassette (CYT-24)</li><li>Quantum Ultra Floor-Ceiling Flex (UYT-24)</li><li>Quantum Ultra Ducted Ceiling Concealed (RYT-24)</li></ul><p>For information on mounting the outdoor unit, click <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-systems-mount-odu-3659469" target="_blank" rel="noopener noreferrer">here</a>.&#xA0;</p><h2 id="select-the-location"><u>Select the Location</u></h2><p>Follow the tolerances depicted in the illustration below:&#xA0;</p><p><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120319-1859db3e-5ecd-48e9-8bdd-faf41444ae78-wyt17_odu_installation_requirements.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></p><p>Follow these best practices for selecting an optimal space for installing the outdoor unit:&#xA0;</p><ul><li>Do not install the unit near sources of heat, steam, or flammable gases.&#xA0;</li><li>Do not install the system in areas prone to extreme winds or dust.&#xA0;</li><li>Do not install the outdoor unit in an area that has many individuals pass by.&#xA0;</li><li>Select a location where the air discharge and operating sound level will not disturb others.&#xA0;</li><li>Install the system in a shaded area or utilize a cover/sun protection that will not interfere with air flow. This will also protect the system from heavy rain or snow.&#xA0;</li><li>Install the unit in a safe and sturdy location.&#xA0;</li><li>Install rubber vibration absorbers if the system can induce vibrations in any structure.&#xA0;</li><li><strong>If the unit is exposed to heavy win</strong><strong>d:&#xA0;</strong>Install the unit so that the air outlet fan is at a 90&#xB0; angle to the direction of the wind. If needed, use wind baffles or build a barrier in front of, but sufficiently away from, the unit to protect it from extremely heavy winds.&#xA0;</li><li><strong>If the unit is frequently exposed to heavy rain or snow:&#xA0;</strong>Build a shelter above the unit to protect it from the rain or snow. Be careful not to obstruct the air flow around the unit.&#xA0;</li><li><strong>If the unit is frequently exposed to salty air (seaside air):</strong> Use specifically approved anti-corrosion coating sprays on the heat exchanger surface in order to resist corrosion.&#xA0;</li></ul>

Select the Installation Location for Outdoor Units

This article explains how to set up the condensate water drainage for outdoor units.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to set up the condensate water drainage for outdoor units.&#xA0;</p><p>Use the drain joint and drain pipe included with the system to direct away the condensate water and ice formed in the outdoor unit during Heating mode.&#xA0;</p><p>This is optional and only needed if the default configuration of the water drainage out from the port on the bottom side is not desired.&#xA0;</p><p id="isPasted">This article is for the following systems:&#xA0;</p><ul><li>Diamante Essenza (WYT-17)</li><li>Diamante Pro (WYT-20)</li><li>Quantum Ultra High-Wall (WYT-24)</li><li>Quantum Hyperformance (WYT-25)</li><li>Quantum Fresh (WYT-FA)</li><li>Quantum Ultra Ceiling Cassette (CYT-24)</li><li>Quantum Ultra Floor-Ceiling Flex (UYT-24)</li><li>Quantum Ultra Ducted Ceiling Concealed (RYT-24)</li></ul><h2 id="steps"><u>Steps</u></h2><p>Follow these steps to set up the outdoor unit condensate water drainage:&#xA0;</p><ol><li>Fasten the drain port in the 1 inch (25 mm) port located in the part of the unit shown in the illustration.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120320-a02905f0-7848-4a41-a7af-367f6bc7c51b-wyt17_odu_condensate_water_drainage.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li><li>Connect the drain port and drain pipe.&#xA0;</li><li>Ensure the condensate will drain to a suitable place.&#xA0;</li></ol>

Set Up the Condensate Water Drainage for Outdoor Units

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