Before You Begin
Please read this manual thoroughly before you begin. If you encounter problems please see the
troubleshooting section near the end of this manual. This boiler should only be installed and
tested by qualified personnel with experience in hydronic heating systems, and electrical
installations. This boiler should not be modified or altered in any manner. Any modification or
alteration may cause the boiler to malfunction and cause serious damage and injury, and will
void the manufacturers warranty.
The installation of this boiler must comply with local regulations and
codes. Verify the “Name Plate” rating to properly size conductors, and
overcurrent protection.
(1) Before installation, ensure that the local electrical inspection authority will accept
connection of this boiler to the existing panel.
(2) This boiler may only be installed and tested by qualified personnel.
(3) The electrical power supply should be checked for adequacy for the additional load of
the boiler. All models require connection of 240 volt single phase power to terminals L1
and L2, and connection of a neutral conductor to the N terminal (see Fig. 4).
Introduction
Your Electric Boiler has been designed to exacting specifications to provide controlled efficient
heating and maximum service life. The boiler is controlled internally by an electronic control
board. The boiler is energized when the external thermostat wired to the control board calls for
heat. The circulation pump is started first to provide flow through the heating system, then the
heating elements are staged on as required. A temperature sensor mounted in the tank
monitors the water temperature, and the internal control board maintains the temperature of
the water exiting the boiler by modulating the elements on or off as required. The temperature
is set by the aquastat control on the lower left corner of the control board. The modulating
control strategy built into the control board uses only the minimum number of elements
necessary to maintain the desired temperature, resulting in maximum comfort.
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