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Hydro Unit
Installation Manual
EN
Settings for 2-zone temperature control
• Procure a motorized mixing valve (refer to “Control
parts specifications” on page 22 for the details.)
locally and perform piping. Connect the valve cables
to terminals TB04 (1), (2), (3) and (4) of the Hydro
Unit.
• Procure a buffer tank locally.
• Procure a water pump locally, and connect its cables
to terminals TB05 (1) and (2) of the Hydro Unit.
To inhibit interlocking the water pump with the
internal pump of the Hydro Unit, set DIP SW10-3 on
the Hydro Unit board to OFF.
• Set DIP SW12-3 on the Hydro Unit board to ON.
(Refer to page 32.)
Attach the temperature sensor (TFI) connected to
terminals TB06 C and D of the Hydro Unit near the
hot water inlet of the Hydro Unit.
• Fix TFI sensor on the room heating supply pipe by
using the connector procured in locally.
• Cover the cables with insulation tube (minimum 1
mm) or conduit so that the user cannot touch them
directly.
54-EN
Summary of Contents for HWS-1405XWHM3-E
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