Installation Manual for ACiQ Outdoor Unit Central Inverter Systems

Quick guide from the manual

This manual provides essential installation instructions for ACiQ outdoor inverter systems. Installation must be performed by a licensed professional HVAC installer or equivalent. Improper installation can lead to property damage, personal injury, or loss of life. Always ensure the unit is properly grounded and installed on a firm, level surface.

Safety Precautions

Before beginning installation, read all safety guidelines carefully:

• Electrical Safety: Use a dedicated electrical circuit. Ensure the unit is properly grounded. Turn off the main power before performing any electrical work.
• Handling: Use two or more people to move the unit to avoid injury. Wear gloves and protective clothing to avoid sharp sheet metal edges.
• Environment: Do not install in locations exposed to combustible gas leaks, excessive dust, or where the unit may be exposed to heavy rain or snow without protection.

Outdoor Unit Installation

Select a location that meets the following requirements:

• Space: Ensure adequate clearance for air circulation (refer to the installation space requirements diagram).
• Support: The location must be firm and solid to support the unit's weight and prevent vibration.
• Drainage: Install the unit on risers of at least 15cm (6in) to keep it above local mean snowfall.
• Extreme Weather: If exposed to heavy wind, install the outlet fan at a 90° angle to the wind direction. If exposed to heavy rain or snow, build a shelter above the unit.

Refrigerant Piping Connection

Proper piping is critical for system efficiency:

• Cutting: Use a pipe cutter to ensure a perfect 90° angle. Remove all burrs to prevent leaks.
• Flaring: Proper flaring is essential for an airtight seal. Use a torque wrench to tighten flare nuts according to the specified torque values.
• Oil Traps: Install an oil trap every 6m (20ft) for units <36,000 Btu/h or every 10m (32.8ft) for units ≥36,000 Btu/h on vertical suction line risers.

Wiring

All electrical connections must follow the wiring diagram located on the panels of the indoor and outdoor units:

• Connection Methods: The manual details specific methods (A, B, C) depending on the control system (communicating vs. 24V thermostat).
• DIP Switches: Configure DIP switches on the outdoor unit according to the required features (e.g., 24V communication scheme vs. 485 communication scheme).
• Cabling: Do not intertwine signal cables with other wiring.

Air Evacuation

Evacuation is required to remove non-condensable gas and moisture:

1. Connect the manifold gauge to the outdoor unit's low-pressure valve and the vacuum pump.
2. Run the vacuum pump until the compound meter reads -76cmHg or 500 microns.
3. Wait 5 minutes to ensure no pressure change.
4. Open the high and low-pressure valves using a hexagonal wrench.

Test Run

Perform a test run after installation is complete:

• Verify that the refrigeration system does not leak.
• Check that the drainage system is unimpeded.
• Ensure there is no abnormal noise or vibration during operation.
• Confirm the unit is operating in the correct mode (e.g., COOL mode).