Hessaire H Series Ductless Mini-Split AC Installation Instructions

1) Getting Started

1.1 Contents

Included items:

• Indoor Unit (Air Circulator)
• Indoor Unit Wall Mount Bracket
• Outdoor Unit
• Outdoor Unit Vibration Foot Pads (4)
• Remote Controller & Wall Holder
• Thermal Tape
• Line Sets--Piping W/Insulated Wrap (2)
• Through Hole Edge Cover
• Communication Cable--Indoor To Outdoor Unit
• Drain Tubing Extension
• Drain Port For Outdoor Unit
• Wiring Cable--Connection box to outdoor unit
• Manual

Note: Outdoor Unit Pad is not included.

1.2 Suggested Tools

• Safety Glasses
• Work Gloves
• Adjustable Wrenches
• Screwdriver (Philips & Flathead)
• Allen Wrench Set (Standard)
• Torque Wrench
• Drill & Drill Bits, 3" Hole Saw
• R410A Adapter
• Vacuum Pump
• Clamp On Amp Meter
• Level
• Pipe Cutter
• R410A Flaring Tool
• Micron Gauge

2) General Safety Precautions

Read Before Installation. Incorrect installation may cause serious damage or injury.

• Risk of electrical shock can cause injury or death. Disconnect all remote electric power supplies before servicing and installing.
• The appliance shall be installed in accordance with local electrical safety regulations and National Electrical Codes (NEC).
• Unit must be properly grounded during installation to avoid electrical shock.
• Power supply to the outdoor unit must be an independent, dedicated, grounded circuit.
• Insufficient electrical capacity can cause electrical shock or fire. Ensure proper gauge of wire is used based on rated current.
• Do not modify length of power supply cord or use an extension cord with the unit. If the supply cord is damaged, it must be replaced by the manufacturer, a service agent, or similarly qualified persons to avoid a hazard.
• Do not install the unit near combustible materials or in a location exposed to combustible gases.
• It is recommended that the length of the copper lines between the indoor unit and outdoor unit is less than 7.5 meters (24.6 ft). Longer lines negatively impact efficiency.
• Adults should operate this appliance. Children should be supervised.
• Install drain tubing according to instructions. Improper drainage can damage property.
• Avoid installing in damp locations (e.g., laundry rooms, bathrooms) as water exposure may short circuit electrical components.
• When charging refrigerant (R410A), charge in liquid state to maintain chemical composition and performance.
• The refrigerant circuit temperature is high; keep interconnection cable away from copper tubes.
• Use only factory-provided or approved parts and accessories.
• Install unit in a secure location that will support its weight.

3) Dimensions

Diagram Description: Visuals show front and side views of indoor and outdoor units with labeled dimensions (W, H, D).

4) Indoor Unit Installation

4.1 Select Location

Skill Level: 1 (Beginner)

Recommended location criteria:

• Allows for maximum air circulation.
• Has a convenient drainage location.
• Area does not cause noise issues for others.
• Located on a strong structure (wall) to support its weight.
• At least 3ft (approx. 90cm) from other electrical devices (computer, TV, radio, etc.).
• Location allows for easy arrangement of piping and wall hole.
• Avoid wall studs when drilling the 3" hole.
• Adhere to minimum clearances.

Avoid installing near:

• Sources of heat, steam, or combustible gases.
• Flammable materials like curtains.
• Obstacles that block air circulation.
• Areas in direct sunlight.
• Doorways.

Indoor Unit Clearances:

• Minimum Distance From Ceiling: 8 inches
• Minimum Distance From Side Wall: 2 inches
• Recommended Distance From Floor: 8 feet

4.2 Attach Mounting Plate To Wall

Skill Level: 1 (Beginner)

Steps:

• Remove the mounting plate from the back of the indoor unit.
• Determine the desired indoor unit placement and locate the mounting plate accordingly, ensuring it aligns with at least one wall stud for sturdy mounting. Heavy-duty screw anchors are recommended for drywall, block, or brick.
• Ensure the mounting plate is horizontal and level.
• Mark the center of the indoor unit on the mounting plate for future reference (note: this may not be the exact center of the unit).
• Use a minimum of 6 evenly spaced mounting screws (not included) to support the unit's weight.
• Securely tighten all screws, ensuring the plate is tight against the wall.

Diagram Description (Fig. 4.2): Shows clearances for the indoor unit and mounting plate, indicating minimum distances from the ceiling (8 inches) and side walls (2 inches).

4.3 Drill Through-Hole In Outdoor Wall

Skill Level: 1 (Beginner)

Procedure:

• Avoid electrical wires, plumbing, and wall studs when drilling.
• Drill a 3" hole through the wall to pass refrigerant piping, drain tube, and signal cable to the exterior.
• Determine the hole location based on the mounting plate position. The bottom of the 3" hole should not drop below the bottom edge of the wall mount bracket to ensure the indoor unit covers it. If rerouting, ensure the hole is covered by the unit where possible.
• Drill the hole from the interior wall through to the exterior at a slight downward angle (2-3 degrees) towards the outside to ensure proper drainage.
• If drilling through concrete or brick, special drill bits are required.

Diagram Description (Fig. 4.3 & 4.3b): Illustrates wall hole dimensions (Dim. A, B, C) for different models and shows the 3" hole drilled at a slight downward angle from the interior to the exterior wall.

4.4 Connect Signal Cable To Indoor Unit

Skill Level: 1 (Beginner)

Procedure:

• Refer to safety precautions before connecting wiring.
• The signal cable enables communication and provides power to the indoor unit.
• Lift the front access panel of the indoor unit to expose the wiring cover and terminal block on the right side.
• Feed the signal cable through the back of the indoor unit to the terminal block.
• Remove the wire cover from the terminal block using a screwdriver.
• Connect the cable ends to the indoor unit terminal block according to the wiring diagram (also found under the cover near the terminal block). Ensure correct voltage connections.
• Once connections are secure, replace the wire cover and secure the cable using the built-in cable clamp.

Diagram Description (Fig. 4.4 & 4.4b): Shows the indoor unit's front view with the access panel open to reveal the wiring terminal block, and a wiring diagram illustrating connections for the communication cable.

4.5 Mount Indoor Unit To Wall

Skill Level: 1 (Beginner)

Procedure:

• The typical piping orientation is straight out from the back (Position A). Other orientations (B, C, D) may require using knockouts and additional piping/cable lengths.
• Position the indoor unit face down to access its back. Gently bend refrigerant piping stubs straight up and back (Position 3), being careful not to kink them.
• Locate the drain tube stub and signal cable. Run them along the underside of the piping and secure together with vinyl tape.
• The unit is now ready to be attached to the wall bracket. Guide piping, cable, and drain tubing through the wall hole.
• Tilt the unit slightly to hook the top onto the tab hooks on the top edge of the wall mounting bracket until it is self-supported.
• Push the bottom front of the indoor unit towards the wall with even pressure until it "snaps" onto the hooks along the bottom edge of the mounting plate.
• Ensure the unit is securely in place with no uneven gaps. Minor adjustments left or right may be needed to align piping with the wall hole.

Diagram Description (Fig. 4.5 & 4.5b): Shows the rear view of the indoor unit with different piping exit positions (A, B, C, D) and illustrates how to attach the unit to the wall bracket by guiding the piping, cable, and drain tubing through the wall hole and hooking the unit onto the bracket.

4.6 Connect Refrigerant Piping

Skill Level: 2 (Intermediate)

Procedure:

• From the exterior, gently bend the pipe/drain/cable stub downward towards the outdoor unit location, supporting it to prevent kinks. Keep it close to the exterior wall.
• Remove cap nuts from the refrigerant piping stubs coming through the wall. A brief "hissing" sound upon opening is normal (nitrogen release).
• Uncoil enough line set piping to reach the outdoor unit valves.
• Connect the flare nut from the line set end to the piping stub from the indoor unit and hand-tighten both lines.
• Using two wrenches, securely tighten the fittings on both lines. Refer to the torque chart (Fig. 4.6c) for proper values to prevent under or over-tightening. Overtightening can damage copper lines.

Diagram Description (Fig. 4.6 & 4.6b): Shows the piping stub from the indoor unit before and after bending downwards. It illustrates connecting the line set flare nut to the piping stub and connecting the drain tube extension. Fig. 4.6c provides a torque chart for different pipe sizes.

4.7 Connect Drain Tubing Extension

Skill Level: 1 (Beginner)

Connect the drain tubing extension piece to the drain stub from the interior unit. The drain tubing should run straight downward along the refrigerant piping and communication cable.

5) Outdoor Unit Installation

5.1 Select Location

Skill Level: 1 (Beginner)

Location Criteria:

• Meets all clearance requirements (Minimum 10" side/back, 20" front).
• Corresponds with desired indoor unit placement.
• Area has good air circulation and ventilation.
• Firm and solid surface to support the unit and prevent vibration.
• Located where noise will not disturb others.
• Protected from long periods of direct sunlight, rain, and flooding.

Do not install near:

• Obstacles blocking air intake or discharge.
• Public streets, crowded areas, or where noise will disturb others.
• Animals or plants that may be harmed by air discharge.
• Sources of combustible gases.
• Areas exposed to large amounts of dust or high winds.

Diagram Description (Fig. 5.1): Shows the outdoor unit with minimum clearance requirements indicated on all sides (10" side/back, 20" front) and highlights the four foot anchor tabs.

5.2 Install Pad/Anchor Unit

Skill Level: 1 (Beginner)

Procedure:

• Place the pad on the ground in the chosen location. Ensure the pad is level and on a solid surface that won't sink.
• Anchor the outdoor unit firmly to the pad by fastening screws through the foot tabs.
• It is advised to use the included rubber foot pads to lessen vibration.

5.3 Connect Signal Cables

Skill Level: 2 (Intermediate)

Procedure:

• Remove the cable/wire junction box cover.
• Locate the signal cable ends. The signal cable from the indoor unit runs down the exterior wall with the piping and drain tube.
• Run the signal cable through the right-side cable wire access hole.
• Connect the signal cable ends to the terminal block on the right side of the junction box, following the provided connection diagram (Fig. 5.3b) for correct voltage and secure connections.

Diagram Description (Fig. 5.3 & 5.3b): Shows the outdoor unit with its cable wire junction box cover and highlights the right-side access hole for the communication cable. Fig. 5.3b provides the communication cable connection diagram.

5.4 Connect Power Wires

Skill Level: 3 (Qualified)

Procedure:

• Power connection box installation and power connection must be performed by qualified personnel.
• All wiring must comply with the wiring diagram inside the junction box cover and local/national codes.
• The power connection box should be located within 6ft of the outdoor unit.
• Run outdoor-rated power cable from the connection box to the outdoor unit, feeding it through the left-hand wire access hole. (Note: SJ power cable is provided; check local codes for proper cable type).
• Ensure all connections are secure.

Diagram Description (Fig. 5.4): Shows the outdoor unit's cable wire junction box cover and highlights the left-hand access hole for the power cable from the outdoor connection box.

5.5 Connect Refrigerant Piping To Outdoor Unit

Skill Level: 2 (Intermediate)

Procedure:

• Remove the valve cover from the outdoor unit to access the valves.
• Uncoil just enough insulated line set piping to reach the valves.
• Hand-tighten both lines to the corresponding valves. Note: The two refrigerant pipes have different diameters and can only be installed one way.
• Support the main valve body with a second wrench before tightening each flare nut with a wrench to the specified torque (refer to Fig. 4.6c, page 9).
• While firmly gripping the valve body, use a torque wrench to tighten the flare nuts to the specified torque.

Diagram Description (Fig. 5.5): Illustrates supporting the main valve body while tightening the flare nuts with a torque wrench.

6) Vacuum Testing & Charging

Skill Level: 3 (Qualified)

Precautions: This step is recommended for qualified installers. Air and moisture in refrigerant lines can cause damage, reduce efficiency, and cause injury.

Procedure:

• Ensure all piping and electrical connections are correct.
• Release air and moisture from the refrigerant circuit using a vacuum pump with a manifold gauge.
• A brief "hissing" sound upon initial valve opening is normal (nitrogen release). If hissing continues, check flared piping connections for tightness.
• How to Vacuum Air Tubes:
  1. Unscrew and remove caps from the 2 and 3-way valves.
  2. Unscrew and remove the cap from the service port valve.
  3. Connect the vacuum pump flexible hose to the service valve.
  4. Start the vacuum pump for 10-15 minutes until a vacuum of 10 mm Hg absolute is reached.
  5. With the vacuum pump still running, close the low-pressure knob on the manifold. Stop the vacuum pump.
  6. Open the 2-way valve 1/4 turn, then close it after 10 seconds. Check tightness of all joints using liquid soap or an electronic leak detector.
  7. Turn the 2 and 3-way valve stems to fully close the valves. Disconnect the vacuum pump hose.
  8. Replace and tighten all valve caps.

Diagram Description (Fig. 6.0): Shows a detail of valve opening with copper pipe, flare nut, Allen wrench, hex, dust cap, and service port. It also illustrates the connection of a vacuum pump to the service port.

7) Electrical & Gas Leak Checks

Electrical Check Prior To Start Up

Skill Level: 3 (Qualified)

• Confirm all electrical wiring adheres to national/local codes and unit wiring diagrams.
• Before test run, check grounding resistance with a resistance tester; it must be less than 4 Ω.
• During test run, perform an electrical leakage test with a multimeter. If leakage is detected, turn off the unit, disconnect power, and call an electrician.

Gas Leak Check Prior To Start Up

Skill Level: 1 (Beginner)

• Apply soapy water to all pipe connection points using a soft brush. The presence of bubbles indicates a leak.

Installation Wrap Up

Skill Level: 1 (Beginner)

• Wrap the line set, communication wire, and drain tubing together using the provided vinyl tape.
• Ensure electrical box access covers and valve access covers are in place.
• Proceed to general start-up checklist and procedures.

8) Start Up

Skill Level: 1 (Beginner)

Before Test Run:

• Confirm electrical system is safe and operating properly.
• Ensure the unit is properly grounded.
• Verify electrical and valve access covers are securely in place.
• Check all gas connections for leaks.
• Confirm both valves are fully open.

Test Run Instructions:

1. Connect power to the unit.
2. Allow approximately one minute for the unit to turn on when starting for the first time.
3. Press the on/off button on the remote controller to turn the indoor unit on. (Note: There may be an initial delay).
4. Select the mode button and choose both heating and cooling functions to confirm all operations work correctly.
5. Check all louver and fan speed functions.
6. Ensure water drains from the outdoor unit's drain tube in cooling mode.

For detailed remote control functions, WiFi setup, maintenance, or troubleshooting, refer to the User Manual, Remote Control Manual, or WiFi setup instructions sheet. More information is also available online at www.hessaire.com.