Gree GUHD series - Page 71

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than the drainage outlet of each set of unit. A pipe with thicker wall shall be used for such purpose.
Figure 1-3-8
b. Testing of Drainage System
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After the electrical installation is completed, carry out the testing of the drainage system.
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to ensure that there is no leakage. If the unit is to be installed in a new house, carry out testing before
decorating the ceiling.
c. Matters of Attention
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The diameter of the drain hose should be equal or bigger than the connection pipe’s. ( The diameter
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Drain hose should be short and drooping gradient should at less 1/100 to prevent the formation of air
bubble.
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If drain hose cannot has enough drooping gradient, drain raising pipe should be added.
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To prevent bent of the drain hose, the distance between hoisting stand should is 1 to 1.5m. (As
shown in Figure 1-3-8)
Figure 1-3-9
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The install height of the drain raising pipe should less than 280mm.
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The drain raising pipe should form a right angle with the unit, and distance to unit should not beyond
300mm. (As shown in Figure 1-3-9)
Figure 1-3-10
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The slant gradient of the attached drain hose should be within 75mm so that the drain hole doesn’t
has to endure the unnecessary outside force. (As shown in Figure 1-3-10)
Figure 1-3-11