GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
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3.3.4 Considering snow in outdoor unit installation
3.3.5 During the installation of the ODU, induced and exhaust pipes must be
connected. In addition, the aperture opening rate of shutters must be at least 80%,
and the angle between the shutters and the horizontal plane should be less than 20°.
Requirements for installing exhaust air duct are as follows:
(1) Basic requirement for connecting an ODU to static pressure ventilating duct
When an ODU needs to be connected to the static pressure ventilating duct, the ventilating duct
must be reasonably designed. The pressure loss caused by the ventilating duct must be calculated.
In addition, a proper type of ventilating duct is necessary. To connect he static pressure ventilating
duct to the ODU, three basic parts are required: 1) ODU; 2) canvas; and3) steel-plate ventilating duct.
The ODU must be interconnected with the ventilating duct through canvas to prevent abnormal
vibration and noise generated by the steel-plate ventilating duct. The joint part must be tightly sealed
with tin foil to avoid air leakage.
(2) Preparations for connecting an ODU to static pressure ventilating duct
1) The ODU is installed properly based on the unit installation requirement.
2) The steel-plate ventilating duct is designed based on the unit and engineering requirement,
and is installed properly according to the engineering standards.
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