Design and installation of central air conditioning expansion tank

Design and installation of central air conditioning expansion tank

1, the installation height of the expansion tank should be at least 0.5m higher than the highest point of the system (generally 1.0 ~ 1.5m+0.5m). When installing the water tank, support the lower part. The supporting length should exceed the bottom plate 100 ~ 200 mm, and the height should be greater than 300 mm. The supporting material can be square wood, reinforced concrete or brick, and the outer wall between water tanks should be considered during installation.

2. The pipeline on the expansion tank includes expansion pipe, signal pipe, overflow pipe, drainage pipe and circulation pipe. The expansion tank volume from the signal pipe to the overflow pipe is the effective expansion volume.

3. Expansion pipe-in principle, it should be connected to return pipe Road in front of the suction port of the circulating water pump, usually connected to the "water collector". Signal pipe-it should be connected to the sink in the refrigerator, and the signal pipe should be equipped with a valve.

4. Overflow pipe-When the volume expansion of water in the system exceeds the overflow pipe opening in the water tank, the water will automatically overflow. No valve is allowed to be installed on the overflow pipe.

5. Drain pipe-used when cleaning water tank and emptying water tank. A valve should be installed on the drain pipe.

6. Usually, overflow pipes and drainage pipes are connected together and discharged to nearby sewers or roofs.

7. Circulating pipeline-set in cold area to prevent the water in the expansion tank from freezing. When there is no possibility of freezing in the water tank, there is no need to set up a circulating pipe. Especially in high-rise buildings, the expansion water tank and domestic water supply water tank are usually located between roof water tanks, and the water tanks are insulated, so there is no possibility of freezing.