
4. Indoor Units installation
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① Install main air vent at the front of the farthest indoor unit from the main drain when installed
indoor units are more than 3.
② You may need to install individual air vent to prevent water flow back at the top of each
indoor unit drainpipe.
AIR-VENT interval of 10m~15m. Drainpipe hanger fixed within 1~1.5m.
If the interval is more than 1~1.5m, bending of the PVC pipe can cause poor water drainage.
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