GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
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4 REQUIREMENTS ON FOUNDATION INSTALLATION
4.1 ODU FOUNDATION
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 (7.87inch)to 300
mm(11.8inch), 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.
Install where it can sufficiently support the weight of the outdoor unit.If the support
strength is not enough, the outdoor unit may drop and hurt people.
Install where the outdoor unit may not fall in strong wind or earthquake.If there is a fault
in the supporting conditions, the outdoor unit may fall and hurt people.
Please take extra cautions on the supporting strength of the ground, liquid outlet
treatment (treatment of the liquid flowing out of the outdoor unit in operation), and the
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