Plumbing; Removing Trapped Air - Toyotomi HC-20 Installation And Operation Instructions Manual

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NOTE: Make sure the piping for the unit is laid out properly, and also check for any water leakage.
1. Install heat insulation material on the water piping to prevent heat loss.
2. Copper or polyethylene pipe should be used for connecting pipes.
3. It is recommended to install shut-off valves on the supply and return sides for easy removal.
4. It is recommended to install a bypass loop in the water pipes with a shut-off valve.
5. Be sure to use anti-freezing solution, or non-scale block, or non-slime block, or corrosion-free water for the circulation
water.
Temperature of circulation water has to be less than 190˚F (87.8˚C)
Maximum allowable working pressure has to be less than 142 PSI
When operating for the first time, air may be trapped in the system. To release the air out of the piping and the unit,
follow the procedures below.
1. To remove the air release cover, remove the two (2) screws.
2. Loosen the Air release screw by using the flat head screwdriver. Release the air out of the piping.
3. Tighten the Air release screw after removing all trapped air.
4. Immediately wipe off any spilled water.
5. Attach the Air release cover.
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Supply opening NPT 1/2" Female Return opening NPT 1/2" Female

REMOVING TRAPPED AIR

PLUMBING

Air Release Screw