GREE Photovoltaic Direct-driven Inverter Multi VRF Units
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Step 3 Step 4
Step 5 Step 6
Method 2
1) Install the ODU (2) and steel-plate ventilating duct (1). Take out the grille from the top of the top
case component. Use the prepared canvas casing inside out (4) to cover the surroundings over
the top of the unit. Keep the top of canvas casing (4) 30 to 50 mm higher over the top of the unit.
2) Use a steel bar to press tightly the canvas casing (4) around the top case of the unit. Use a
hand-operated electric drill to drill holes and fasten the canvas casing onto the unit through steel
bar by using tapping screws.
3) Pull up the canvas casing reversely and use the steel bar to press the canvas casing tightly onto
the counter flange of the steel-plate ventilating duct. Use a hand-operated electric drill to drill
holes and fasten the parts by using tapping screws.
4) Use the tin foil to seal the joints and check the joints' reliability.
NOTE:
Remove the grille on the top case when connecting an ODU to static pressure ventilating
duct; otherwise, the air volume, especially the unit operating performance will be affected. For method 2,
since drills are required on the top case, the powder coated protective layer on the top case will be
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