Hessaire Ductless Mini-Split AC H Series Installation Instructions

Models: (R32 Refrigerant)

H12TT1 (1 Ton, 18.0 SEER2), H12TT2 (1 Ton, 20.0 SEER2), H18TT2 (1.5 Ton, 21.0 SEER2), H24TT2 (2 Ton, 19.5 SEER2)

Models: (R454B Refrigerant)

H12FB1 (1 Ton, 22.0 SEER2), H18FB2 (1.5 Ton, 21.0 SEER2), H24FB2 (2 Ton, 22.5 SEER2)

Please read and keep these instructions for future reference.

1) Getting Started

1.1 Contents

Included:

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

A diagram shows the indoor unit, outdoor unit, remote controller, wall mount bracket, wiring cable, piping, drain tube, thermal tape, and coiled line set.

1.2 Suggested Tools

A list of tools required for installation, with corresponding images:

• Safety Glasses
• Work Gloves
• Adjustable Wrenches
• Screwdriver—Both Phillips & 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

WARNING: 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. Power supply to the outdoor unit must be an independent, dedicated, grounded circuit. Ensure proper gauge of wire is used. Inspect power cord and communication cable for damage. Do not modify power supply cord length or use an extension cord. If the supply cord is damaged, it must be replaced by the manufacturer, a service agent, or similarly qualified persons.

CAUTION: 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 and outdoor unit is less than 7.5 meters (24.6 ft). Adults should operate this appliance; children should be supervised. Install drain tubing according to instructions; improper drainage can damage property. Do not install in damp locations. When charging refrigerant, charge in liquid state if the refrigerant is R32 or R454B. Refrigerant pressure is very high; use caution. Piping connections should be done on the outdoor side. Do not remove end caps from linesets until ready to connect. Removing them too early can allow moisture in the lines. The refrigerant circuit temperature will be high; keep the interconnection cable away from the copper tube. Use only factory-provided or approved parts and accessories. Install unit in a secure location that will support its weight.

3) Dimensions

A table detailing the dimensions and weights of the indoor and outdoor units for various models:

Diagrams illustrate the dimensions of the indoor and outdoor units.

4) Indoor Unit Installation

4.1 Select Location

Skill Level 1

When selecting a location for the indoor unit, it is recommended that:

• It allows for maximum air circulation.
• It has a convenient drainage location.
• The area doesn't cause noise issues for other people.
• It is on a strong enough structure (wall) to support its weight.
• It is at least 3ft from all other electrical devices (computer, TV, radio, etc.).
• It is located where piping and wall hole can easily be arranged—avoiding wall studs when drilling a 3" hole.
• Adhere to minimum clearances shown below.

Be sure to avoid installing near:

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

Diagrams show 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

Attaching The Mounting Plate:

Remove the mounting plate from the back of the indoor unit. Determine the location for the mounting plate according to the desired indoor unit placement and location recommendations. Locate the plate so it catches 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. Use a minimum of 6 evenly spaced mounting screws to support the unit's weight. Securely tighten all screws.

Notes: The shape of your mounting plate may differ, but the installation steps remain the same. Ensure the top of the mounting plate is level before anchoring.

Diagrams show mounting plate clearances: Minimum distance to ceiling: 8 inches, Minimum distance from wall: 2 inches.

4.3 Drill Through-Hole In Outdoor Wall

Skill Level 1

CAUTION: When drilling wall holes, avoid electrical wires, plumbing, and wall studs.

Drilling Hole Through Wall To Exterior:

Drill a 3” hole in the wall to pass refrigerant piping, drain tube, and signal cable. Determine the hole location based on the mounting plate. The bottom of the 3” hole should not drop below the bottom edge of the wall mount bracket. Drill the hole at a slight downward angle towards the outside. Special drill bits may be required for concrete or brick.

A table provides wall hole mounting dimensions (A, B, C) for different models.

Diagrams illustrate the drilling process and hole dimensions.

4.4 Connect Signal Cable To Indoor Unit

Skill Level 1

CAUTION: Refer to Safety Precaution page before connecting any wiring.

The signal cable enables communication and provides power between the indoor and outdoor units. Lift the front access panel of the indoor unit to expose the wiring cover and terminal block. Feed the signal cable through the back side of the indoor unit to the terminal block. Remove the wire cover from the terminal block. Make connections according to the wiring diagram, ensuring the correct voltage is used. Replace the wire cover and secure the cable.

Diagrams show the face view of the indoor unit and wiring diagrams for 115V and 208/230V connections.

4.5 Mount Indoor Unit To Wall

Skill Level 1

Mounting indoor unit to wall:

The typical orientation for piping is straight out from the back of the indoor unit. If other orientations are needed, use the knockouts on the ends of the unit. Position the indoor unit face down to access the back. Locate refrigerant piping stubs and gently bend them straight back. Locate the drain tube and signal cable, run them along the underside of the piping, and secure with vinyl tape. Hold the unit up to the wall and guide the piping, cable, and drain tubing through the wall hole. Tilt the unit to hook the top onto the wall mounting bracket. Push the bottom front of the unit towards the wall until it snaps onto the bottom hooks of the mounting plate. Ensure the unit is securely in place with no uneven gaps. Adjust left or right as needed to align piping with the wall hole.

CAUTION: Do not remove plastic cap nuts until ready to attach the outdoor line set. Removing caps too early may result in moisture getting in the lines.

Diagrams show the rear view of the indoor unit, attaching the indoor unit to the wall bracket, and indoor refrigerant lines with plastic cap nuts.

4.6 Connect Refrigerant Piping

Skill Level 2

Connecting Refrigerant Piping To Refrigerant Pipe Stubs From Indoor Unit:

From the exterior, gently bend the pipe/drain/cable stub downward towards the outdoor unit location. Support piping while bending to prevent kinks. Keep piping stub close to the exterior wall. Once bent, the line sets are ready for connection. Remove cap nuts from the indoor refrigerant piping stubs. A brief hissing sound is normal as nitrogen is released. Gently uncoil the line set (2 pipes) and remove plastic caps. Connect the flare nut from the line set to the piping stub from the indoor unit and hand tighten. Use two wrenches to securely tighten the fittings. Refer to the chart for proper torque values to prevent under or over-tightening.

A chart provides pipe size, torque, nut width, and minimum thickness for different refrigerant lines.

Diagrams illustrate the piping connection process.

4.7 Connect Drain Tubing Extension

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

Selecting Outdoor Unit Location:

Choose an appropriate location for the outdoor unit. The location should:

• Meet all clearance requirements (see Fig. 5.1).
• Corresponds with the desired indoor unit placement.
• Have good air circulation and ventilation.
• Be firm and solid to support the unit and prevent vibration.
• Be located where noise will not disturb others.
• Be protected from long periods of direct sunlight, rain, and flooding.

Do not install in locations that are near:

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

Diagrams show required clearances around the outdoor unit: Over 10" clearance on sides and front, Over 20" clearance on the back. Foot Anchor Tabs (4) are indicated.

5.2 Install Pad/Anchor Unit

Once the ideal location is decided, place the pad on the ground. 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.

6) Vacuum Testing & Charging

Skill Level 3

Precautions: It is recommended that a qualified installer perform this step. Air and foreign matter in the refrigerant lines can cause pressure spikes, damage the air conditioner, reduce efficiency, and cause injury. 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 is normal during initial testing and valve opening as nitrogen is released. If a hissing air release sound continues, check for improperly torqued flared piping connections.

How to Vacuum Air Tubes:

1. Unscrew and remove caps from 2 and 3-way valves.
2. Unscrew and remove cap from service port valve.
3. Connect vacuum pump flexible hose to the service valve.
4. Start vacuum pump for 10-15 minutes until reaching a vacuum of 10 mm Hg absolutes.
5. With vacuum pump still running, close the low pressure knob on the vacuum pump 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 flexible vacuum pump hose.
8. Replace and tighten all valve caps.

Diagrams illustrate the vacuum testing setup and valve operation.

7) Electrical & Gas Leak Checks

Electrical Check Prior To Start Up:

Skill Level 3

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

Gas Leak Check Prior To Start Up:

Skill Level 1

Apply soapy water to all pipe connection points. Bubbles will indicate a leak.

Installation Wrap Up:

Skill Level 1

Wrap the line set, communication wire, and drain tubing together using 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

Before Test Run:

Skill Level 1

Confirm electrical system is safe and operating properly. Ensure the unit is properly grounded. Ensure 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 a minute for the unit to turn on for the first time.
3. Press the on/off button on the remote controller to turn the indoor unit on. (Note: There will be an initial delay.)
4. Select the mode button and choose heating and cooling functions to confirm all functions work.
5. Check all louver and fan speed functions.
6. Ensure water drains from the outside drain tube in cooling mode.

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