PLEASE READ

Before Installing your GREE MULTIPRO

STOP IMPORTANT: Before You Continue...

Warranty

ONLY VALID IF SYSTEM IS INSTALLED BY A LICENSED HVAC CONTRACTOR.

Installation must comply with applicable local & national codes.

TOOLS REQUIRED

R410A Flaring Tool
Clamp-On Amp Meter
Vacuum Pump
Refrigerant Scale
Micron Gauge
Refrigerant Manifold & Gauges
Nitrogen Regulator
Wrenches (standard)
Adjustable Torque Wrench
Hex Keys (Allen Wrenches)
Drill & Drill Bits
Hole Saw
Pipe Cutter
Level
Screw Drivers
Safety Goggles
Gloves

BEST PRACTICES

Verify Equipment

✔️ Ensure both IDU & ODU
Model Numbers begin with GMV

Unit Placement

✔️ Follow clearance guidelines on indoor & outdoor units for proper airflow & servicing
✔️ Include space for drainage so condensate flows out of unit
✔️ Anchor both units properly to prevent vibration or malfunction
✔️ Be sure condensate drain tubing is pitched downward for proper drainage

Piping

✔️ Use only correct line set size as determined by either Basic Layout, system builder or selection software
✔️ Insulate both refrigerant lines from each other
✔️ For flare connections, use 45° flaring tool
✔️ Refer to GREE Multipro reference guide for Piping details.

Communication Wiring

✔️ All Control wiring is 18 AWG, 2 Conductor, Stranded
Shielding is not required, but if used must tie together, following the daisy chain (parallel) configuration of the control wiring, and grounded only at the outdoor unit.
✔️ Resistor to be installed on the last indoor unit D1 & D2

Wiring

✔️ Wiring and breaker sizing must be in accordance with local codes
✔️ Outdoor and Indoor units are powered separately and are 208/230 vac
✔️ Must have a means to disconnect for all indoor and outdoor units
✔️ Multiple indoor units may share one breaker (Check local requirements)
✔️ Surge protector HIGHLY recommended

Charging

✔️ Test refrigerant lines for leaks by pressurizing with Nitrogen to 500 PSI.
✔️ While under pressure, use a leak detection solution to test for all leaks at all flare solder, compression fitting connections.
✔️ Use only approved evacuation hose & vacuum pump oil for proper evacuation and leak testing: Evacuate to less than 500 Microns and hold for 30 minutes.
✔️ If refrigerant is added, use an electronic scale and weigh in the precise amount that is determined by the basic layout or the selection software
✔️ Open all service valves (air handler) prior to energizing the system.

INSTALL SUPPORT

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