Buderus ST Series, ST150, ST200, ST300 Installation Manual

6300 2508 - 99/09 USA

Installation Manual

ST150, ST2 0 0, ST3 0 0

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General Guidelines 1

The ST Series indirect-fired water heaters are factory assembled with the exception of the screw-on feet, piping accessories
and relief valve (furnished and included in packaging) and a tank aquastat (not furnished) to be installed in the field.

This manual contains information regarding installation and maintenance of the ST Series indirect-fired water heaters,
installation of its piping accessories and placement of aquastats or sensors for temperature control.

NOTE: This manual is for reference only. The manual does NOT attempt to address all design,

installation and safety considerations. It is the responsibility of the installer to determine the
applicability and safety of each individual application and ensure its compliance with local
building codes.

It is expected that the installer is a licensed heating contractor with knowledge of accepted
industry practices for the installation and maintenance of the equipment and various
applications of the equipment involved.

NOTE: The ST Tank is equipped with a built-in electric anode rod. Keep the power supply

(furnished) plugged into the control module for corrosion protection and warranty of the tank.

A flashing red light on the control module indicates improper operation of the electric
anode rod. Check the states of the electric anode rod. A steady green light on the control module
indicates proper operation of the electric anode rod. Resolve anode rod problems as soon as possible
by contacting your Installer or Service company.

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