This article provides an overview of the installation process for wall-mounted indoor units.

<h2 id="isPasted"><u>Introduction</u></h2><p>This article provides an overview of the installation process for wall-mounted indoor units.&#xA0;</p><p>Each section in this article represents a step in the installation process. Click the link in each section to learn about that specific step.&#xA0;</p><p>This article is for the following systems:&#xA0;</p><ul><li><a href="https://www.pioneerminisplit.com/collections/diamante-essenza-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Essenza High-Wall (WYT-17)</a></li><li><a href="https://www.pioneerminisplit.com/collections/diamante-pro-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Pro High-Wall (WYT-20)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Ultra High-Wall (WYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-hyperformance-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Hyperformance High-Wall (WYT-25)</a></li></ul><p><strong>Note:</strong> The installation process is slightly different for Quantum Fresh indoor units. For information on that installation process, click this <a href="https://help.pioneerminisplit.com/en-US/install-quantum-fresh-indoor-units-getting-started-4721119" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</p><h2 id="select-an-ideal-location-for-installation"><u>Select an Ideal Location for Installation</u></h2><p>Before beginning, we recommend understanding how to select an ideal location for installing the indoor unit.&#xA0;</p><p>Click this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-systems-select-idu-installation-location-3632154" target="_blank" rel="noopener noreferrer">link</a> for information.&#xA0;</p><h2 id="1-install-the-mounting-plate"><u>1. Install the Mounting Plate</u></h2><p>Begin by installing the mounting plate for the indoor unit. This step includes drilling holes to specific measurements.&#xA0;</p><p>For more information, see this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-units-install-idu-mounting-plate-3623495" target="_blank" rel="noopener noreferrer">article</a>.&#xA0;</p><h2 id="2-drill-the-wall-hole-for-piping"><u>2. Drill the Wall Hole for Piping</u></h2><p>Next, drill the piping wall hole for the indoor unit. Each model has different guidelines for drilling the wall holes.&#xA0;</p><p>Click this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-systems-drill-piping-wall-hole-3624089" target="_blank" rel="noopener noreferrer">link</a> to learn more about this step.&#xA0;</p><h2 id="3-wire-the-indoor-unit"><u>3. Wire the Indoor Unit</u></h2><p>Connect the electrical cables and signal cable for the indoor unit. The indoor unit requires specific gauge wires, depending on the type of model.&#xA0;</p><p>Get more information by reading this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-wire-idu-4261975" target="_blank" rel="noopener noreferrer">article</a>.&#xA0;</p><h2 id="4-prepare-the-refrigerant-piping"><u>4. Prepare the Refrigerant Piping</u></h2><p>Get the refrigerant piping ready by deciding which type of configuration is most suitable for the space. The piping &quot;pigtails&quot; pre-attached to the indoor unit can be run in three different methods.&#xA0;</p><p>Read this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-systems-prepare-refrigerant-piping-idu-3624238" target="_blank" rel="noopener noreferrer">article</a> for more information.&#xA0;</p><h2 id="isPasted"><u>5. Connect the Drain Hose</u></h2><p>Connect the drain hose for the indoor unit. By default, the drain hose attaches to the left-hand side of the unit. However, it can also be attached to the right-hand side.&#xA0;</p><p>For more information on this step, click this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-systems-connect-drain-hose-3624387" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</p><h2 id="6-connect-the-refrigerant-piping"><u>6. Connect the Refrigerant Piping</u></h2><p>After unwinding the copper piping kit, connect the refrigerant piping to the indoor unit. This step requires torquing the protection caps and flange connection to specific measurements.&#xA0;</p><p>Click this <a href="https://help.pioneerminisplit.com/en-US/connect-refrigerant-piping-idu-3624603" target="_blank" rel="noopener noreferrer">link</a> to get more information.&#xA0;</p><h2 id="7-wrap-the-lines--mount-the-indoor-unit"><u>7. Wrap the Lines &amp; Mount the Indoor Unit</u></h2><p>Finish the installation process by wrapping the lines and mounting the indoor unit.&#xA0;</p><p>Get information on this step by clicking this <a href="https://help.pioneerminisplit.com/en-US/wrap-the-lines-and-mount-the-indoor-unit-for-wall-mounted-systems-3639742" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</p><h2 id="isPasted"><u>After the Installation is Completed</u></h2><p>We recommend performing a running inspection after the installation is completed. For information on performing the test run, click this <a href="https://help.pioneerminisplit.com/en-US/safety-checks-test-run-3672815" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</p>

Install Wall-Mounted Indoor Units: Getting Started

This article provides an overview of the installation process for Quantum Fresh High-Wall indoor units.

<h2 id="isPasted"><u>Introduction</u></h2><p>This article provides an overview of the installation process for <a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall</a> indoor units.&#xA0;</p><p>Each section in this article represents a step in the installation process. Click the link in each section to learn about that specific step.&#xA0;</p><p><strong>Note:</strong> The installation process is different for the other wall-mounted indoor units. For information on that installation process, click this <a href="https://help.pioneerminisplit.com/en-US/install-wall-mounted-idu-getting-started-4717614" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</p><h2 id="select-an-ideal-location-for-installation"><u>Select an Ideal Location for Installation</u></h2><p>Before beginning, we recommend understanding how to select an ideal location for installing the outdoor unit.&#xA0;</p><p>Click this <a href="https://help.pioneerminisplit.com/en-US/wytfa-select-idu-installation-location-3632995" target="_blank" rel="noopener noreferrer">link</a> for information.&#xA0;</p><h2 id="1-install-the-mounting-plate"><u>1. Install the Mounting Plate</u></h2><p>Begin by installing the mounting plate for the system. This step includes drilling holes to specific measurements.&#xA0;</p><p>For more information, see this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-units-install-idu-mounting-plate-3623495" target="_blank" rel="noopener noreferrer">article</a>.&#xA0;</p><h2 id="2-drill-the-wall-hole-for-piping"><u>2. Drill the Wall Hole for Piping</u></h2><p>Next, drill the piping wall hole for the indoor unit. Each model has different guidelines for drilling the wall holes.&#xA0;</p><p>Click this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-systems-drill-piping-wall-hole-3624089" target="_blank" rel="noopener noreferrer">link</a> to learn more about this step.&#xA0;</p><h2 id="isPasted"><u>3. Wire the Indoor Unit</u></h2><p>Connect the electrical cables and signal cable for the indoor unit. The indoor unit requires specific gauge wires, depending on the type of system.&#xA0;</p><p>Get more information by reading this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-wire-idu-4261975" target="_blank" rel="noopener noreferrer">article</a>.&#xA0;</p><h2 id="4-prepare-the-refrigerant-piping"><u>4. Prepare the Refrigerant Piping</u></h2><p>Get the refrigerant piping ready by deciding which type of configuration is most suitable for the space. The piping &quot;pigtails&quot; pre-attached to the indoor unit can be run in three different methods.&#xA0;</p><p>Read this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-systems-prepare-refrigerant-piping-idu-3624238" target="_blank" rel="noopener noreferrer">article</a> for more information.&#xA0;</p><h2 id="isPasted"><u>5. Connect the Drain Hose</u></h2><p>Connect the drain hose for the indoor unit. Unlike the other wall-mounted systems, the drain hose for the Quantum Fresh system can only be attached to the right-hand side of the unit &#xA0;</p><p>For more information on this step, click this <a href="https://help.pioneerminisplit.com/en-US/wytfa-connect-drain-hose-4262136" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</p><h2 id="isPasted"><u>6. Connect the Fresh Air Pipe</u></h2><p>Connect the fresh air pipe for the indoor unit. This step is only for Quantum Fresh systems.&#xA0;</p><p>Read this <a href="https://help.pioneerminisplit.com/en-US/wytfa-connect-fresh-air-pipe-3637642" target="_blank" rel="noopener noreferrer">article</a> to get more information.&#xA0;</p><h2 id="7-connect-the-refrigerant-piping"><u>7. Connect the Refrigerant Piping</u></h2><p>After unwinding the copper piping kit, connect the refrigerant piping to the indoor unit. This step requires torquing the protection caps and flange connection to specific measurements.&#xA0;</p><p>Click this <a href="https://help.pioneerminisplit.com/en-US/connect-refrigerant-piping-idu-3624603" target="_blank" rel="noopener noreferrer">link</a> to get more information.&#xA0;</p><h2 id="8-wrap-the-lines--mount-the-indoor-unit"><u>8. Wrap the Lines &amp; Mount the Indoor Unit</u></h2><p>Finish the installation process by wrapping the lines and mounting the indoor unit.&#xA0;</p><p>Get information on this step by clicking this <a href="https://help.pioneerminisplit.com/en-US/wrap-the-lines-and-mount-the-indoor-unit-for-wall-mounted-systems-3639742" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</p><h2 id="after-the-installation-is-completed"><u>After the Installation is Completed</u></h2><p>We recommend performing a running inspection after the installation is completed. For information on performing the test run, click this <a href="https://help.pioneerminisplit.com/en-US/safety-checks-test-run-3672815" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</p>

Install Quantum Fresh High-Wall Indoor Units: Getting Started

This article explains how to connect the drain hose for Quantum Fresh High-Wall (WYT-FA) indoor units.

<h2 id="isPasted"><u>Introduction</u></h2><p>This article explains how to connect the drain hose for <a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA) indoor units</a>. This is the fifth step in the installation process for Quantum Fresh High-Wall indoor units.&#xA0;</p><p>Unlike the other wall-mounted indoor units, the drain hose for the Quantum Fresh High-Wall system can only be attached to the right-hand side of the unit (right when facing the back of the unit).&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012120-169bae83-87b5-4ac0-9992-a057c2a3b1a4-wytfa_drainage_port.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></p><p><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026022413-8c608b56-f8cf-4125-be34-189a3e5add38-wytfa_drain_hose_right.png" style="width: 600px;" class="fr-fic fr-dib fr-bordered"></p><p>For information on connecting the drain hose for the other wall-mounted indoor units, see this <a href="https://help.pioneerminisplit.com/en-US/wall-mounted-systems-connect-drain-hose-3624387" target="_blank" rel="noopener noreferrer">article</a>.&#xA0;</p><h2 id="isPasted"><u>Notes</u></h2><ul><li>Do not kink the drain hose.&#xA0;</li><li>Do not create a water trap (siphon).&#xA0;</li><li>Do not put the end of the drain hose in water or in a container that will collect water.&#xA0;</li></ul><h2 id="isPasted"><u>Steps</u></h2><ol><li>Attach the drain hose on the same side that the refrigerant piping will exit the unit from, ensuring proper drainage.&#xA0;</li><li>Attach any drain hose extensions (sold separately) to the end of the drain hose.&#xA0;</li><li>Wrap the connection point of the drain hose firmly with Teflon tape to create a good seal and prevent leaks.&#xA0;</li><li>For the portion of the drain hose that will remain indoors, wrap it with foam pipe insulation to prevent condensation.&#xA0;</li><li>Remove the air filter and pour a small amount of water into the drain pan to make sure that water flows away from the unit smoothly.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120121-10f7c2db-a692-40ec-ba92-9d4680569c72-wyt17_drain_hose_yes.png" style="width: 500px;" class="fr-fic fr-bordered fr-dib"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120121-a96f3708-56df-4da6-a2e9-771fc09a8a89-wyt17_drain_hose_no.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li></ol>

Connect the Drain Hose for Quantum Fresh High-Wall (WYT-FA) Indoor Units

This article explains how to connect the drain hose for wall-mounted indoor units.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to connect the drain hose for wall-mounted indoor units. This is the fifth step in the installation process for wall-mounted indoor units.&#xA0;</p><p id="isPasted">This article is for the following systems:&#xA0;</p><ul><li><a href="https://www.pioneerminisplit.com/collections/diamante-essenza-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Essenza High-Wall (WYT-17)</a></li><li><a href="https://www.pioneerminisplit.com/collections/diamante-pro-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Pro High-Wall (WYT-20)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Ultra High-Wall (WYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-hyperformance-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Hyperformance High-Wall (WYT-25)</a></li></ul><p>The indoor unit has one drain connection on the left and right side. Either one can be utilized. One side will have a hose connected, while the other is plugged.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120121-df92823e-eb3a-4948-8b88-82c378fc6024-wyt17_drain_hose_ports.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></p><p>By default, the drain hose is attached to the left-hand side of the unit (left when facing the back of the unit). However, it can also be attached to the right-hand side.&#xA0;</p><p>The drain hose for <a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA)</a> systems can only attached to the right-hand side of the unit. For information on connecting the drain hose for Quantum Fresh High-Wall systems, see this <a href="https://help.pioneerminisplit.com/en-US/wytfa-connect-drain-hose-4262136" target="_blank" rel="noopener noreferrer">article</a>.&#xA0;</p><h2 id="steps"><u>Steps</u></h2><ol><li>Attach the drain hose on the same side that the refrigerant piping will exit the unit from, ensuring proper drainage.&#xA0;</li><li>Attach any drain hose extensions (sold separately) to the end of the drain hose.&#xA0;</li><li>Wrap the connection point of the drain hose firmly with Teflon tape to create a good seal and prevent leaks.&#xA0;</li><li>For the portion of the drain hose that will remain indoors, wrap it with foam pipe insulation to prevent condensation.&#xA0;</li><li>Remove the air filter and pour a small amount of water into the drain pan to make sure that water flows away from the unit smoothly.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120121-10f7c2db-a692-40ec-ba92-9d4680569c72-wyt17_drain_hose_yes.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120121-a96f3708-56df-4da6-a2e9-771fc09a8a89-wyt17_drain_hose_no.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li></ol><h2 id="notes"><u>Notes</u></h2><ul><li>Do not kink the drain hose.&#xA0;</li><li>Do not create a water trap (siphon).&#xA0;</li><li>Do not put the end of the drain hose in water or in a container that will collect water.&#xA0;</li></ul>

Connect the Drain Hose for Wall-Mounted Indoor Units

This article explains how to connect the fresh air pipe for Quantum Fresh High-Wall (WYT-FA) indoor units.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to connect the fresh air pipe for <a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA) indoor units</a>. This is the sixth step in the installation process for Quantum Fresh High-Wall indoor units.&#xA0;</p><h2 id="connect-the-fresh-air-pipe"><u>Connect the Fresh Air Pipe</u></h2><p>Screw the fresh air duct onto the rear of the indoor unit.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120218-d2ae2763-e730-44f2-a88c-e140c876aa01-wytfa_connect_fresh_air_pipe.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></p><p>Route the fresh air duct together with the other components of the service bundle (refrigerant piping, signal wire, and drain tubing).&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120218-615be1db-1dd6-4d34-86f7-38e28111ddab-wytfa_connect_fresh_air_pipe_bundle.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></p>

Connect the Fresh Air Pipe for Quantum Fresh High-Wall (WYT-FA) Indoor Units

This article explains how to drill the piping wall hole for wall-mounted indoor units.

<h2 id="isPasted"><u>Introduction</u></h2><p>This article explains how to drill the piping wall hole for wall-mounted indoor units. This is the second step in the installation process for all wall-mounted indoor units.&#xA0;</p><p>This article is for the following systems:&#xA0;</p><ul><li><a href="https://www.pioneerminisplit.com/collections/diamante-essenza-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Essenza High-Wall (WYT-17)</a></li><li><a href="https://www.pioneerminisplit.com/collections/diamante-pro-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Pro High-Wall (WYT-20)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Ultra High-Wall (WYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-hyperformance-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Hyperformance High-Wall (WYT-25)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA)</a></li></ul><h2 id="isPasted"><u>Steps</u></h2><ol><li>After securing the mounting plate to the wall, temporarily mount the indoor unit onto the mounting plate in order to confirm the location of the wall hole.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120120-b3701b53-fc64-497f-b636-30bdd8689e85-wyt17_drill_wall_hole_piping.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li><li>Use a pencil to lightly trace the bottom corner of the indoor unit, depending on which side exit the piping will go through.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120120-d74f71a2-9084-4df5-8225-cbf0f749f1c8-wyt17_drill_wall_hole_piping_2.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li><li>Take the indoor unit off of the mounting plate and make a mark of where the hole will be, ensuring ample clearance between the tracing and bracket.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120120-8a97f46e-007f-4cd5-b25c-eff5a6f258ab-wyt17_drill_wall_hole_piping_3.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li><li>Drill a 2-1/2 to 3-1/8 inch (63.5-79 mm) wall hole at a slight downward angle using a core drill. Be careful to avoid wires, plumbing, and other sensitive materials. The bottom of the inside hole should be a 1/4 inch (6.35 mm) above the bottom of the outside hole. &#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120120-2407bdf9-877d-41fc-b7a1-4cf8ee15026c-wyt17_drill_wall_hole_piping_4.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li></ol><h2 id="guidelines-for-drilling-the-wall-holes"><u>Guidelines for Drilling the Wall Holes</u></h2><p>Below are the suggested locations for the wall holes. Each system has different guidelines.&#xA0;</p><p>Both the left side and right side exits have a 2-1/2 inch (63.5 mm) hole. Confirm the holes are proper by corner tracing.&#xA0;</p><p><strong><u>Diamante Essenza High-Wall (WYT-17)</u></strong></p><p><strong>11,500 BTU Systems</strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120421-c20698df-3f15-4055-a492-f7776824c590-wyt17_drilling_wall_holes_12k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></p><p><strong>17,000 BTU Systems</strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120421-82cefea2-4b3a-4cc5-a97e-ccd81714e881-wyt17_drilling_wall_holes_18k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></p><p><strong>23,000 BTU Systems</strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120421-c31dd961-0ae1-4005-861e-66ac35790158-wyt17_drilling_wall_holes_24k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></p><p><strong>35,000 BTU Systems</strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120421-060a9061-d2da-4425-a349-04b5edf7dd14-wyt17_drilling_wall_holes_36k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></p><p><strong><u>Diamante Pro High-Wall (WYT-20)</u></strong></p><p><strong>9,000 &amp; 12,000 BTU Systems</strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120421-f7460875-1423-41af-a711-690c4942ffa3-wyt20_drill_wall_holes_9_12k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></p><p><strong>18,000 BTU Systems<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120421-70ba837c-dc1d-4ad3-9ade-ac93a2b34467-wyt20_drill_wall_holes_18k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></p><p><strong>24,000, 31,500, &amp; 36,000 BTU Systems</strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120421-d0fd0714-db9b-4d8f-a624-d3e96d19ae28-wyt20_drill_wall_holes_24_30_36k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></p><p><strong><u>Quantum Ultra High-Wall (WYT-24)</u></strong></p><p><strong>9,000 BTU</strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120513-c65f0786-26dd-42e5-98b8-ffc3fa592528-wyt24_drill_wall_holes_9k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong><strong>12,000 BTU</strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120513-ed8f59d5-6707-49d8-b8d6-7fdae9acd7dd-wyt24_drill_wall_holes_12k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></p><p><strong>18,000 &amp; 23,000 BTU</strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120513-a5ceb128-9d71-42e0-a2b4-628c812e9be1-wyt24_drill_wall_holes_18_24k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong><strong><u>Quantum Hyperformance High-Wall (WYT-25)</u></strong></p><p><strong><strong id="isPasted">9,000 BTU</strong></strong><strong><strong id="isPasted"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120513-12ee44fa-3ceb-4127-9f81-964b8456ef8e-wyt25_drill_wall_holes_9k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></strong><strong><strong id="isPasted"><strong id="isPasted">12,000 BTU</strong></strong></strong><strong><strong id="isPasted"><strong id="isPasted"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120513-58b016de-a84a-4a6d-9e4a-90f44ea30640-wyt25_drill_wall_holes_12k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></strong></strong><strong><strong id="isPasted"><strong id="isPasted"><strong id="isPasted">18,000 &amp; 24,000 BTU</strong></strong></strong></strong><strong><strong id="isPasted"><strong id="isPasted"><strong id="isPasted"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120513-4c37d148-8f17-419b-b932-3b49c25263c3-wyt25_drill_wall_holes_18_24k.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong></strong></strong></strong><strong><u>Quantum Fresh High-Wall (WYT-FA)</u></strong><strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120513-774e0f97-3b97-433e-89b0-0cba25b4d183-wytfa_drill_wall_holes.png" style="width: 800px;" class="fr-fic fr-dib fr-bordered"></strong><br></p>

Drill the Piping Wall Hole for Wall-Mounted Indoor Units

This article explains how to install the mounting plate for wall-mounted indoor units.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to install the mounting plate for wall-mounted indoor units. This is the first step in the installation process for all wall-mounted indoor units.&#xA0;</p><p>The actual appearance of the mounting plate may differ slightly, but the process is similar.&#xA0;</p><p>This article is for the following systems:&#xA0;</p><ul><li id="isPasted"><a href="https://www.pioneerminisplit.com/collections/diamante-essenza-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Essenza High-Wall (WYT-17)</a></li><li><a href="https://www.pioneerminisplit.com/collections/diamante-pro-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Pro High-Wall (WYT-20)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Ultra High-Wall (WYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-hyperformance-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Hyperformance High-Wall (WYT-25)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA)</a></li></ul><h2 id="steps"><u>Steps</u></h2><ol><li>Dislodge the mounting plate from the rear of the indoor unit and place the mounting plate against the wall where the system will hang. Use a level to ensure that the plate is horizontally and vertically level.&#xA0;</li><li>Drill 1-1/4 inch (32 mm) deep holes for each screw to enter. The locations are flexible but should be spaced well.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120120-fbe1895f-2d60-4576-8829-b7d017fb6ccd-wyt17_install_mounting_plate.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li><li>Insert the plastic anchors into each of the holes.&#xA0;</li><li>Fix the mounting plate to the wall by using the included tapping screws. Check that it is secured.&#xA0;</li></ol>

Install the Mounting Plate for Wall-Mounted Indoor Units

This article explains how to prepare the refrigerant piping for wall-mounted indoor units.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to prepare the refrigerant piping for wall-mounted indoor units. This is the fourth step in the installation process for all wall-mounted indoor units.&#xA0;</p><p id="isPasted">This article is for the following systems:&#xA0;</p><ul><li id="isPasted"><a href="https://www.pioneerminisplit.com/collections/diamante-essenza-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Essenza High-Wall (WYT-17)</a></li><li><a href="https://www.pioneerminisplit.com/collections/diamante-pro-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Pro High-Wall (WYT-20)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Ultra High-Wall (WYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-hyperformance-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Hyperformance High-Wall (WYT-25)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA)</a></li></ul><h2 id="configuration-options"><u>Configuration Options</u></h2><p>The piping &quot;pigtails&quot; pre-attached to the indoor unit can be run in three different methods. Decide which type of configuration is most suitable before continuing. <u><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120121-644e7c36-1c86-4a75-960e-ac5708584c66-wyt17_refrigerant_piping_connection_options.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></u></p><p><strong>Option 1:</strong> By default, the refrigerant piping is routed for a left side exit. This method can either use the left side knockout for a side exit or a wall hole can be drilled on the left side of the unit&apos;s rear.&#xA0;</p><p><strong>Option 2:</strong> Routing the refrigerant piping straight through the back of the system will facilitate the connections to the copper pipe extensions intended to be made outside. This is recommended to simplify the process.&#xA0;</p><p><strong>Option 3:</strong> This method is a right side exit, but is not recommended as it involves a 180&#xB0; bend of the piping. This increases the risk of kinking or collapsing the lines dramatically. Bend the piping slowly and cautiously.&#xA0;</p><p>If a side-exit is chosen, there are knock-out panels on either side of the unit that can be cut along the groove to provide a notch for the pipe to exit from. Use a suitable cutter to do this.&#xA0;</p><p><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012120-d1350612-e4ad-4695-90d3-ebcc950badac-a35f8b38-6fa8-4f13-86fc-dfbaf93fdaf4.png" id="isPasted" class="fr-fic fr-bordered fr-dib"></p><p>Run the piping in the direction of the wall hole. Bind the copper pipes, drainpipe, and power cables together with tape. Ensure that the bundle is exiting at a continuous downward pitch. Keep the drain hose at the bottom, so that the water can flow freely.&#xA0;</p><h2 id="notes"><u>Notes</u>&#xA0;</h2><ul><li>Do not remove the seal caps from the pipe ends until it is time to connect it, avoiding contaminants from entering.&#xA0;</li><li>If the pipe is bent/pulled too often, it will become still. Don&apos;t bend the pipe more than three times at one point. Be careful not to kink any piping.&#xA0;</li><li>When extending the coiled copper pipes, straighten them by unwinding gently. Unwind the coil gently against a flat surface, rather than pulling at the ends. &#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120121-e47ae950-6523-46e0-9d90-86bfc9ebe7f9-wyt17_refrigerant_piping_connection_options_unwind_coil.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li></ul>

Prepare the Refrigerant Piping for Wall-Mounted Indoor Units

This article explains how to select the installation location for Quantum Fresh (WYT-FA) indoor units.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to select the installation location for <a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA)</a> indoor units.</p><p id="isPasted">Install the indoor unit inside the room intended for air conditioning. Avoid corridors and communal areas. Before starting the installation, select the positions of both the indoor and outdoors units.&#xA0;</p><p>For the different dimensions of this system, click this <a href="https://help.pioneerminisplit.com/en-US/wytfa-dimensions-weight-4380390" target="_blank" rel="noopener noreferrer">link</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/2025120214-db01a7ab-f128-4cd9-afad-d63df4514469-wytfa_installation_location.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></p><p>Due to the fresh air + gentle wind mechanism, the model is designed without fingerguards. For safety reasons, the indoor unit&apos;s louver must be located at a safe height of 8-1/4 feet (2.5 m) or more above the floor. If the system is installed at a shorter height, any injury incurred from sticking fingers into the airflow louver is the responsibility of the installer or user.&#xA0;</p><p id="isPasted">Follow these best practices for selecting the optimal installation location:&#xA0;</p><ul><li>Do not install the unit on a wall that is subject to vibrations.&#xA0;</li><li>Do not install the system near sources of heat, steam, or flammable gases.&#xA0;</li><li>Do not install the indoor unit in a location that is exposed to direct sunlight.&#xA0;</li><li>Ensure that the inlet and outlet vents are not obstructed. The system should be able to output air all across the room.&#xA0;</li><li>Minimize the distance between the indoor and outdoor units. Install the system in a location where connecting the indoor and outdoor units will be as simple as possible.&#xA0;</li><li>Install the unit on a strong wall and where it is easy to drain the condensate water.&#xA0;</li><li>Install the unit in a location where it will be easy to service the product and perform any necessary maintenance.&#xA0;</li></ul><h2 id="installation-diagram"><u>Installation Diagram</u></h2><p><strong>Outdoor Above Indoor Unit<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012119-d45fc6aa-4e5a-498a-9346-d36d0c25025e-wytfa_installation_diagram_outdoor_above_idu.png" style="width: 300px;" class="fr-fic fr-dib fr-bordered"></strong></p><p><strong>Indoor Above Indoor Unit<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012119-194a3445-8234-48db-85f1-b4c878b1b914-wytfa_installation_diagram_indoor_above_odu.png" style="width: 300px;" class="fr-fic fr-dib fr-bordered"></strong></p><ul><li id="isPasted">Install the indoor unit so that its bottom is at least 8-1/4 feet (2.5 m) above the floor.&#xA0;</li><li>Ensure adequate space above the air handler for return airflow (4-6 inches, ideally 8 inches / 102-152 mm, ideally 203 mm).&#xA0;</li></ul><p><strong>Fresh Air Inlet<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012119-8f0dfc54-dfcd-4620-950f-4280589d6c28-wytfa_installation_diagram_fresh_inlet.png" style="width: 300px;" class="fr-fic fr-dib fr-bordered"></strong></p><ul><li>Keep the fresh inlet within 14 inches (355.6 mm) of the wall.&#xA0;</li><li>Rotate the pipe as needed to avoid interference with other lines.&#xA0;</li><li>Ensure a slight downward slope to prevent rain intrusion.&#xA0;</li><li>Maintain a minimum bend radius of 2-3/8 inches (60 mm) to preserve airflow.&#xA0;</li><li>Do not place the inlet near exhaust outlets, enclosed areas, or polluted air sources.&#xA0;</li></ul>

Select the Installation Location for Quantum Fresh (WYT-FA) Indoor Units

This article explains how to select the indoor unit installation location for wall-mounted systems.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to select the installation location for indoor units of wall-mounted systems, excluding <a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA) systems</a>.&#xA0;</p><p>This article is for the following systems:&#xA0;</p><ul><li id="isPasted"><a href="https://www.pioneerminisplit.com/collections/diamante-essenza-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Essenza High-Wall (WYT-17)</a></li><li><a href="https://www.pioneerminisplit.com/collections/diamante-pro-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Pro High-Wall (WYT-20)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Ultra High-Wall (WYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-hyperformance-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Hyperformance High-Wall (WYT-25)</a></li></ul><p>Install the indoor unit inside the room intended for air conditioning. Avoid corridors and communal areas. Before starting the installation, select the positions of both the indoor and outdoors units. Follow the minimum clearance requirements for both the indoor and outdoor units.&#xA0;</p><h2 id="dimensions"><u>Dimensions</u></h2><ul><li>For the dimensions of the Diamante Essenza High-Wall, click this <a href="https://help.pioneerminisplit.com/en-US/wyt17-dimensions-weights-4375045" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</li><li>For the dimensions of the Diamante Pro High-Wall, click this <a href="https://help.pioneerminisplit.com/en-US/wyt20-dimensions-weights-4375256" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</li><li>For the dimensions of the Quantum Ultra High-Wall, click this <a href="https://help.pioneerminisplit.com/en-US/wyt24-dimensions-weights-4375302" target="_blank" rel="noopener noreferrer">link</a>.&#xA0;</li><li>For the dimensions of the Quantum Hyperformance High-Wall, click this <a href="https://help.pioneerminisplit.com/en-US/wyt25-dimensions-weight-4380262" target="_blank" rel="noopener noreferrer">link</a>.</li></ul><h2 id="select-the-location"><u>Select the Location</u></h2><p>Follow the tolerances depicted in the illustration below:&#xA0;</p><h2 id><u><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120214-22c25a21-6391-4819-a2b7-de1ebb0c14d5-wyt17_installation_location.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></u></h2><p>Follow these best practices for selecting the optimal installation location:</p><ul><li>Do not install the unit on a wall that is subject to vibrations.&#xA0;</li><li>Do not install the system near sources of heat, steam, of flammable gases.&#xA0;</li><li>Do not install the indoor unit in a location that is exposed to direct sunlight.&#xA0;</li><li>Ensure that the inlet and outlet vents are not obstructed. The system should be able to output air all across the room.&#xA0;</li><li>Minimize the distance between the indoor and outdoor units. Install the unit in a location where connecting the indoor and outdoor units will be as simple as possible.&#xA0;</li><li>Install the unit on a strong wall and where it is easy to drain the condensate water.&#xA0;</li><li>Install the unit in a location where it will be easy to service the product and perform any necessary maintenance.&#xA0;</li></ul><h2 id="installation-diagram"><u>Installation Diagram</u><u><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012119-400da155-7243-4d7a-9cfa-34e174b37c3a-wyt17_installation_diagram.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></u></h2><ul><li>Install the indoor unit so that its bottom is at least 6 feet (1.8 m) above the floor.&#xA0;</li><li>Ensure adequate space above the air handler for return airflow (4-6 inches, ideally 8 inches / 102-152 mm, ideally 203 mm).&#xA0;</li><li>For 12K and 18K systems: Follow the given constraints in the above figure.&#xA0;</li><li>For 24K and 36K systems: The allowable height differential increases to 50 feet / 15 m (24K) and 65 feet / 20 m (36K). The allowable pipe length is 65 feet / 20 m (24K) and 100 feet / 30.5 m (36K).&#xA0;</li></ul>

Select the Installation Location for Wall-Mounted Indoor Units

This article explains how to connect the electrical cables and signal cable to wall-mounted indoor units.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to connect the electrical cables and signal cable to wall-mounted indoor units. This is the third step in the installation process for all wall-mounted indoor units.&#xA0;</p><p id="isPasted">This article is for the following systems:&#xA0;</p><ul><li id="isPasted"><a href="https://www.pioneerminisplit.com/collections/diamante-essenza-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Essenza High-Wall (WYT-17)</a></li><li><a href="https://www.pioneerminisplit.com/collections/diamante-pro-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Pro High-Wall (WYT-20)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Ultra High-Wall (WYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-hyperformance-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Hyperformance High-Wall (WYT-25)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA)</a></li></ul><h2 id="electrical-connections"><u>Electrical Connections</u></h2><p>1. Lift the indoor unit&apos;s front panel.&#xA0;</p><p>2. Remove the cover as indicated in the illustrations.</p><p><strong>Diamante Essenza High-Wall, Diamante Pro High-Wall, Quantum Ultra High-Wall, and Quantum Hyperformance High-Wall Systems</strong><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012120-a3a60b89-615e-4dc5-9041-13510aa8e49f-wyt17_idu_wiring_diagram_front_panel.png" style="width: 312px;" class="fr-fic fr-dib fr-bordered"></p><p><strong>Quantum Fresh High-Wall</strong></p><p><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012120-66976612-2baf-4634-bc51-2aecb199e8bc-wytfa_wiring_diagram_front_panel.png" style="width: 300px;" class="fr-fic fr-dib fr-bordered"></p><p>3. Consult the circuit diagram affixed to the electrical cover.&#xA0;</p><p>4. Connect the cables to the wiring terminal by following the numbering. Use wire gauge suitable for the electrical power input. Refer to the Cable Wire Specifications section below for more information.&#xA0;</p><p><strong>Notes</strong></p><ul><li>Consult the nameplate on the system for detailed electrical specifications.&#xA0;</li><li>115V systems take a single-pole breaker for the main circuit panel.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012121-b4225448-fac9-48bd-8ece-a450796330a6-wyt17_cable_wire_specifications_single_pole_breaker.png" style="width: 300px;" class="fr-fic fr-dib fr-bordered"></li><li>230V systems require a double-pole breaker (tandem-type will not work).<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012121-abe10f36-4292-4973-9c89-a63802b62dd0-wyt17_cable_wire_specifications_double_pole_breaker.png" style="width: 300px;" class="fr-fic fr-dib fr-bordered"></li></ul><h2 id="connect-the-signal-cable"><u>Connect the Signal Cable</u></h2><p>The indoor unit has three terminals (1, 2, 3) and a ground terminal (g). It is vital that the colors and numbers between the indoor and outdoor units match for each terminal. The color selection does not matter as much as matching number to number does. Do not mix up the wires between each end.&#xA0;</p><p>Connect the wires in accordance with the wiring diagrams, then verify that all wire strands are fully inserted and securely clamped at the terminals. All connections must be tight and free of looseness.&#xA0;</p><p>Consult the diagram affixed to the indoor and outdoor units respectively for specific wiring instructions.&#xA0;</p><h2 id="cable-wire-specifications"><u>Cable Wire Specifications</u></h2><table style="width: 100%;" id="isPasted"><tbody><tr><td style="width: 28.4889%; text-align: center; background-color: rgb(239, 239, 239);" colspan="2" rowspan="2" class="fr-thick"><strong>Diamante Essenza&#xA0;</strong><br><strong>High-Wall</strong></td><td style="width: 14.2444%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>12K/115V</strong></td><td style="width: 14.2444%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>12K/230V</strong></td><td style="width: 14.2444%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>18K</strong></td><td style="width: 14.2444%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>24K</strong></td><td style="width: 16.6667%; text-align: center; background-color: rgb(239, 239, 239); width: 14.2857%;" class="fr-thick"><strong>36K</strong></td></tr><tr><td style="width: 71.3873%; text-align: center; background-color: rgb(239, 239, 239);" colspan="5" class="fr-thick"><strong>Sectional Area (AWG)</strong></td></tr><tr><td style="width: 22.4195%;" rowspan="3" class="fr-thick"><div style="text-align: center;">Power Supply Cable</div></td><td style="width: 6.0694%; text-align: center;" class="fr-thick">N(L2)</td><td style="width: 14.2444%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="text-align: center; width: 14.3064%;" rowspan="3" class="fr-thick">12 AWG</td></tr><tr><td style="width: 6.0694%; text-align: center;" class="fr-thick">L(L1)</td></tr><tr><td style="width: 6.0694%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-25fcd207-460b-4a37-a256-4a81767aba7a-ryt24_wire_idu_symbol.png" style="width: 50px;" class="fr-fic fr-dii"></td></tr><tr><td style="width: 22.4195%; text-align: center;" rowspan="4" class="fr-thick">Connection Cable for Communication Between Indoor &amp; Outdoor Units</td><td style="width: 6.0694%; text-align: center;" class="fr-thick">3(L)</td><td style="width: 14.2444%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="text-align: center; width: 14.3064%;" rowspan="4" class="fr-thick">16 AWG</td></tr><tr><td style="width: 6.0694%; text-align: center;" class="fr-thick">2(N)</td></tr><tr><td style="width: 6.0694%; text-align: center;" class="fr-thick">1(S)</td></tr><tr><td style="width: 6.0694%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-c95f7295-b611-4d7a-ac5e-f8f50fd557f9-ryt24_wire_idu_symbol.png" style="width: 300px;" class="fr-fic fr-dii"></td></tr></tbody></table><p><br></p><table style="width: 100%;" id="isPasted"><tbody><tr><td style="width: 28.4889%; text-align: center; background-color: rgb(239, 239, 239);" colspan="2" rowspan="2" class="fr-thick"><strong>Diamante Pro<br>High-Wall</strong></td><td style="width: 14.2444%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>9K/12K (115V)</strong></td><td style="width: 14.2444%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong id="isPasted">9K/12K (230V)</strong></td><td style="width: 14.2444%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>18K</strong></td><td style="width: 14.2444%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>24K</strong></td><td style="width: 16.6667%; text-align: center; background-color: rgb(239, 239, 239); width: 14.2857%;" class="fr-thick"><strong>30K/36K</strong></td></tr><tr><td style="width: 71.3873%; text-align: center; background-color: rgb(239, 239, 239);" colspan="5" class="fr-thick"><strong>Sectional Area (AWG)</strong></td></tr><tr><td style="width: 22.4195%;" rowspan="3" class="fr-thick"><div style="text-align: center;">Power Supply Cable</div></td><td style="width: 6.0694%; text-align: center;" class="fr-thick">N(L2)</td><td style="width: 14.2444%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="3" class="fr-thick">14 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="text-align: center; width: 14.3064%;" rowspan="3" class="fr-thick">10 AWG</td></tr><tr><td style="width: 6.0694%; text-align: center;" class="fr-thick">L(L1)</td></tr><tr><td style="width: 6.0694%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-25fcd207-460b-4a37-a256-4a81767aba7a-ryt24_wire_idu_symbol.png" style="width: 50px;" class="fr-fic fr-dii"></td></tr><tr><td style="width: 22.4195%; text-align: center;" rowspan="4" class="fr-thick">Connection Cable for Communication Between Indoor &amp; Outdoor Units</td><td style="width: 6.0694%; text-align: center;" class="fr-thick">3(L)</td><td style="width: 14.2444%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 14.2444%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="text-align: center; width: 14.3064%;" rowspan="4" class="fr-thick">16 AWG</td></tr><tr><td style="width: 6.0694%; text-align: center;" class="fr-thick">2(N)</td></tr><tr><td style="width: 6.0694%; text-align: center;" class="fr-thick">1(S)</td></tr><tr><td style="width: 6.0694%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-c95f7295-b611-4d7a-ac5e-f8f50fd557f9-ryt24_wire_idu_symbol.png" style="width: 300px;" class="fr-fic fr-dii"></td></tr></tbody></table><p><br></p><table style="width: 100%;" id="isPasted"><tbody><tr><td style="width: 24.2511%; text-align: center; background-color: rgb(239, 239, 239);" colspan="2" rowspan="2" class="fr-thick"><strong>Quantum Ultra High-Wall</strong></td><td style="width: 12.1871%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>9K/12K (115V)</strong></td><td style="width: 12.1871%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>9K/12K (230V)</strong></td><td style="width: 12.1871%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>18K</strong></td><td style="width: 12.1871%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>24K</strong></td></tr><tr><td style="width: 60.8125%; text-align: center; background-color: rgb(239, 239, 239);" colspan="4" class="fr-thick"><strong>Sectional Area (AWG)</strong></td></tr><tr><td style="width: 19.0808%;" rowspan="3" class="fr-thick"><div style="text-align: center;">Power Supply Cable</div></td><td style="width: 5.1703%; text-align: center;" class="fr-thick">N(L2)</td><td style="width: 12.1871%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="3" class="fr-thick">14 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td></tr><tr><td style="width: 5.1703%; text-align: center;" class="fr-thick">L(L1)</td></tr><tr><td style="width: 5.1703%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-25fcd207-460b-4a37-a256-4a81767aba7a-ryt24_wire_idu_symbol.png" style="width: 50px;" class="fr-fic fr-dii"></td></tr><tr><td style="width: 19.0808%; text-align: center;" rowspan="4" class="fr-thick">Connection Cable for Communication Between Indoor &amp; Outdoor Units</td><td style="width: 5.1703%; text-align: center;" class="fr-thick">3(L)</td><td style="width: 12.1871%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td></tr><tr><td style="width: 5.1703%; text-align: center;" class="fr-thick">2(N)</td></tr><tr><td style="width: 5.1703%; text-align: center;" class="fr-thick">1(S)</td></tr><tr><td style="width: 5.1703%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-c95f7295-b611-4d7a-ac5e-f8f50fd557f9-ryt24_wire_idu_symbol.png" style="width: 300px;" class="fr-fic fr-dii"></td></tr></tbody></table><h2 id><br></h2><table style="width: 100%;" id="isPasted"><tbody><tr><td style="width: 24.2511%; text-align: center; background-color: rgb(239, 239, 239);" colspan="2" rowspan="2" class="fr-thick"><strong>Quantum Hyperformance<br>High-Wall</strong></td><td style="width: 12.1871%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>9K</strong></td><td style="width: 12.1871%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>12K</strong></td><td style="width: 12.1871%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>18K</strong></td><td style="width: 12.1871%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>24K</strong></td></tr><tr><td style="width: 60.8125%; text-align: center; background-color: rgb(239, 239, 239);" colspan="4" class="fr-thick"><strong>Sectional Area (AWG)</strong></td></tr><tr><td style="width: 19.0808%;" rowspan="3" class="fr-thick"><div style="text-align: center;">Power Supply Cable</div></td><td style="width: 5.1703%; text-align: center;" class="fr-thick">L2</td><td style="width: 12.1871%; text-align: center;" rowspan="3" class="fr-thick">14 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="3" class="fr-thick">12 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="3" class="fr-thick">10 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="3" class="fr-thick">10 AWG</td></tr><tr><td style="width: 5.1703%; text-align: center;" class="fr-thick">L1</td></tr><tr><td style="width: 5.1703%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-25fcd207-460b-4a37-a256-4a81767aba7a-ryt24_wire_idu_symbol.png" style="width: 50px;" class="fr-fic fr-dii"></td></tr><tr><td style="width: 19.0808%; text-align: center;" rowspan="4" class="fr-thick">Connection Cable for Communication Between Indoor &amp; Outdoor Units</td><td style="width: 5.1703%; text-align: center;" class="fr-thick">3(L)</td><td style="width: 12.1871%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td><td style="width: 12.1871%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td></tr><tr><td style="width: 5.1703%; text-align: center;" class="fr-thick">2(N)</td></tr><tr><td style="width: 5.1703%; text-align: center;" class="fr-thick">1(S)</td></tr><tr><td style="width: 5.1703%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-c95f7295-b611-4d7a-ac5e-f8f50fd557f9-ryt24_wire_idu_symbol.png" style="width: 300px;" class="fr-fic fr-dii"></td></tr></tbody></table><h2 id="-1"><br></h2><table style="width: 100%;" id="isPasted"><tbody><tr><td style="width: 51.3467%; text-align: center; background-color: rgb(239, 239, 239);" colspan="2" rowspan="2" class="fr-thick"><strong>Quantum Fresh<br>High-Wall</strong></td><td style="width: 25.8036%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>12K/230V</strong></td></tr><tr><td style="width: 128.758%; text-align: center; background-color: rgb(239, 239, 239);" class="fr-thick"><strong>Sectional Area (AWG)</strong></td></tr><tr><td style="width: 40.3997%;" rowspan="3" class="fr-thick"><div style="text-align: center;">Power Supply Cable</div></td><td style="width: 10.947%; text-align: center;" class="fr-thick">N(L2)</td><td style="width: 25.8036%; text-align: center;" rowspan="3" class="fr-thick">14 AWG</td></tr><tr><td style="width: 10.947%; text-align: center;" class="fr-thick">L(L1)</td></tr><tr><td style="width: 10.947%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-25fcd207-460b-4a37-a256-4a81767aba7a-ryt24_wire_idu_symbol.png" style="width: 50px;" class="fr-fic fr-dii"></td></tr><tr><td style="width: 40.3997%; text-align: center;" rowspan="4" class="fr-thick">Connection Cable for Communication Between Indoor &amp; Outdoor Units</td><td style="width: 10.947%; text-align: center;" class="fr-thick">3(L)</td><td style="width: 25.8036%; text-align: center;" rowspan="4" class="fr-thick">16 AWG</td></tr><tr><td style="width: 10.947%; text-align: center;" class="fr-thick">2(N)</td></tr><tr><td style="width: 10.947%; text-align: center;" class="fr-thick">1(S)</td></tr><tr><td style="width: 10.947%;" class="fr-thick"><img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2026012115-c95f7295-b611-4d7a-ac5e-f8f50fd557f9-ryt24_wire_idu_symbol.png" style="width: 300px;" class="fr-fic fr-dii"></td></tr></tbody></table><h2 id="-2"><br></h2><h2 id="isPasted"><br></h2>

Wire the Indoor Unit for Wall-Mounted Systems

This article explains how to wrap the lines and mount the indoor unit for wall-mounted systems.

<h2 id="introduction"><u>Introduction</u></h2><p>This article explains how to wrap the lines and mount the indoor unit for wall-mounted systems. This is the final step in the installation process for all wall-mounted indoor units.&#xA0;</p><p>This article is for the following systems:&#xA0;</p><ul><li id="isPasted"><a href="https://www.pioneerminisplit.com/collections/diamante-essenza-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Essenza High-Wall (WYT-17)</a></li><li><a href="https://www.pioneerminisplit.com/collections/diamante-pro-high-wall-series" target="_blank" rel="noopener noreferrer">Diamante Pro High-Wall (WYT-20)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-ultra-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Ultra High-Wall (WYT-24)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-hyperformance-high-wall-series" target="_blank" rel="noopener noreferrer">Quantum Hyperformance High-Wall (WYT-25)</a></li><li><a href="https://www.pioneerminisplit.com/collections/quantum-fresh-series-breathe-the-difference" target="_blank" rel="noopener noreferrer">Quantum Fresh High-Wall (WYT-FA)</a></li></ul><h2 id="steps"><u>Steps</u>&#xA0;</h2><ol><li>Arrange the pipes, cables, and drain hose correctly.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120221-c6bc8840-6196-4146-b64e-d1443c96508d-wyt17_mount_bound.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li><li>Lag the pipe joints with insulation material and secure them with vinyl tape.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120221-794720fa-707f-4f49-a5df-98cec12a09f7-wyt17_mount_vinyl_tape.png" style="width: 500px;" class="fr-fic fr-dib fr-bordered"></li><li>Run the bound bundle through the wall hole and mount the indoor unit securely onto the mounting plate. Press/push the lower part of the indoor unit, so it clicks onto the mounting plate.&#xA0;<img src="https://attachments.gorgias.help/Q9r0k7BYaV2vg13y/hc/9JWjXVxG8m6DvMqm/2025120221-eeb0fa5a-22bf-44e7-a151-bbbd0ebad374-wyt17_mount_plate.png" style="width: 400px;" class="fr-fic fr-dib fr-bordered"></li></ol>

Wrap the Lines & Mount the Indoor Unit for Wall-Mounted Systems

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Financing & Payment

Learn About Our Shipping & Delivery Details

Understand the Qualifications for Free Shipping

Order Status & Shipping

Diamante Essenza High-Wall (WYT-17) Overview

Diamante Pro High-Wall (WYT-20) Overview

Quantum Fresh High-Wall (WYT-FA) Overview

Quantum Hyperformance High-Wall (WYT-25) Overview

Quantum Ultra Ceiling Cassette (CYT-24) Overview

Quantum Ultra Ducted Ceiling Concealed (RYT-24) Overview

Quantum Ultra Floor-Ceiling Flex (UYT-24) Overview

Quantum Ultra High-Wall (WYT-24) Overview

Quantum Ultra Multi-Zone Overview

Vertex Ducted Central Split (DYC-18) Overview

Ducted & Ductless Systems

ECOasis 50 Ductless Wall-Mounted Single-Room Energy Recovery Ventilator (ERV) Overview

ECOasis 150 Ductless Wall-Mounted Single-Room Energy Recovery Ventilator (ERV) Overview

Energy Recovery Ventilators

QHD070 Whole-House Ducted Dehumidifier (QHD) Overview

High Performance Dehumidifier

Full Inverter Rooftop RV Air Conditioner Heat Pump (PYZ) Overview

Under-Bench RV Inverter Packaged Heat Pump Air Conditioner (PYR) Overview

Recreational Vehicle Systems

Product Line Overviews

Find Out How to Complete Returns

Figure Out How to Start Your Return

Learn About Our Policy for Undeliverable or Refused Shipments

Learn About Our Return Policy

Understand How to Return an Item

Understand the Eligibility Requirements for Refunds

Understand Our Return Fees

Understand Our Return Process

Returns & Refunds

Shopping & Pre-Purchase

Find an Installer for Your System

Find Professionals to Install Your Pioneer System

Learn Who is Permitted to Install Your System

Understand if Our Systems can be Self-Installed

Understand the Cost & Time Spent on Installing Systems

First-Time Setup

Connect the Refrigerant Piping to the Indoor Unit

Cassette Units

Ducted Units

Flex Units

Angle Linesets Upward

Complete the Safety Checks & Test Run

Find Out if a Wall-Mounted Indoor Unit can be Set onto Ceilings

Find Out if the Indoor Unit Requires Anything Extra in Order to be Wall-Mounted

Find Out the Ideal Height for Mounting Indoor Units

Leakage Inspection & Vacuuming for Refrigerant Lines

Learn the Gauge of Wire Used for Ductless System Connections

Open the Service Valve

Set Up the Lineset to Exit from the Side of the Indoor Unit

Understand the 6-Foot Plastic Whips & 4-Lead Mini Split Connection Wire

Understand how to Properly Uncoil the Lineset

Understand the Drilling Details to Accommodate Drain & Refrigerant Lines

Understand the Requirements for Installing Your System

Understand the Torque Wrench Size for Installing Your System

Installation Requirements

Understand the Allowable Zone Combinations for Multi-Zone Systems

Multi-Zone Units

Install Outdoor Units: Getting Started

Air Evacuation & Bleed the Circuit for Outdoor Units

Connect the Electrical Wiring for Outdoor Units

Connect the Refrigerant Piping to the Outdoor Unit

Mount the Outdoor Unit

Select the Installation Location for Outdoor Units

Select the Installation Location for Ducted Central Split Outdoor Units

Set Up the Condensate Water Drainage for Outdoor Units

Understand How to Install Ducted Central Split Outdoor Units on Support Pads

Outdoor Units

Install ECOasis 50 Energy Recovery Ventilators

Install ECOasis 150 Energy Recover Ventilators

Energy Recovery Ventilator

Connect the Drain Fitting for QHD070 Whole-House Ducted Dehumidifiers

High Performance Dehumidifiers

Install Rooftop RV Systems: Getting Started

Create the Roof Opening for Rooftop RV Systems

Install the Air Duct & Top Mounting Plate for Rooftop RV Systems

Mount the Panel for Rooftop RV Systems

Place the Unit onto the Roof for Rooftop RV Systems

Setup the Electrical Wiring for Rooftop RV Systems

Setup the System Connections for Rooftop RV Systems

Understand the Installation Requirements for Rooftop RV Systems

Rooftop RV Inverter

Install Under-Bench RV Systems: Getting Started

Connect & Power Up Under-Bench RV Systems

Create the Floor Openings for Under-Bench RV Systems

Create the Recirculation Air Opening for Under-Bench RV Systems

Fasten the Under-Bench RV System into Place

Install the Wall Thermostat for Under-Bench RV Systems

Understand the Ductwork Best Practices for Under-Bench RV Systems

Understand the Installation Requirements for Under-Bench RV Systems

Under-Bench RV Inverter

Understand the DIP Switches for Vertex Ducted Central Split Systems

DIP Switch Layouts

Turn the LED Display On or Off

Understand the Display Board for Ducted Ceiling Concealed Systems

Understand the Display Panel for Rooftop RV Systems

Understand the Front Panel Displays for Ceiling Cassette Systems

Understand the Front Panel Display for Floor-Ceiling Flex Systems

Understand the Front Panel Display for Wall-Mounted Systems

Understand the Master Unit Display for ECOasis 50 Energy Recovery Ventilators

Understand the Onboard Controller & Terminal Block Layout for QHD070 Whole-House Ducted Dehumidifiers