Installation Foundation Of Odu - Gree GMV-S120WL/A-S Service Manual

Step 4
Step 5

5.4 Installation Foundation of ODU

The concrete foundation of the ODU must be strong enough. Ensure that the drainage is
smooth and that the ground drainage or floor drainage is not affected.
Requirements on the concrete foundation are as follows:
1) The concrete foundation must be flat and have enough rigidity and strength to undertake
the unit's weight during running. The height of the foundation is 200 mm to 300 mm, which is
determined based on the size of the unit;
2) The proportion of the cement, sand, and stone for the concrete is 1:2:4. Place 10 reinforced
steel bars (φ10 mm) with a space between of 30 mm;
3) Use the mortar to flatten the surface of the foundation. Sharp edges must be chamfered;
4) When the foundation is built on a concrete floor, crushed stones are not required. But the
foundation surface must be roughened;
5) Clear the oil stains, crushed stones, dirt, and water in the reserved bolt hole of the
foundation and install a temporary cover before installing bolts;
6) Build a drainage ditch around the foundation to discharge the condensate water;
7) If the air conditioner is installed on the roof, check the intensity of the building and take
waterproof measures;
8) If a u-steel foundation is adopted, the structure must be designed with sufficient rigidity and
strength.
GMV5 Home DC Inverter Multi VRF Units
137
① Use a steel bar to
press tightly the canvas
casing around the top
cover 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.
① 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;
② Use a
hand-operated electric
drill to drill holes and
fasten the parts by
using tapping screws;
③ Use the tin foil to
seal the joints and
check the joints'
reliability.
For method 2,
since drills are
required on the
top cover, the
powder coated
protective layer
on the top cover
will be damaged.
As a result, the
anti-corrosion
performance of
the unit top cover
will be reduced.