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.
All wiring 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. 240 volt 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). Three phase models require connection of three phase power of the correct voltage
to the L1, L2, and L3 terminals, and a 120 volt 15 amp supply to the terminals SL and SN
(see Fig. 5).
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 staging the elements on or off as required. This is know as
modulating. The temperature is set by the aquastat control on the side of the boiler. 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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