External Output Terminal Wiring; Wiring For External Output - Toyotomi HC-20 Installation And Operation Instructions Manual

Heat convector

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HC-20_US.qxd 14.7.1 9:13 ページ 7

This unit has an External output terminal for low-voltage (24 volts or less) contacts to connected to a circulation

pump control or zone valve. When connecting the circulation control or zone valve unit to this terminal, it is possible

to stop the circulation by the output from internal contact switch in the Heat convector. When the

ON and there is a call for heat, the internal contact switch is closed. When

temperature reaches 4 degrees above Set temperature the internal contact switch is open.

1. Remove the four (4) screws and the cover on the back side of the unit.

2. Cut the rubber bushing of the cover by a cutter and insert the wire for the circulation control or zone valve.

3. Connect the wire to the terminal block in accordance with the color indication.

4. Fix the cover to the unit with the four (4) screws.

Rubber bushing

After installation is completed, secure the unit to the wall with the wall fixing kit provided with the unit.

NOTE: Make sure the unit is parallel to the wall.