34000 Autry Street, Livonia, MI 48150 • 800.968.5530 • Fax 734.419.0209 • www.hamiltonengineering.com • LIT91127 REV 3/09
ELECTRICAL
PART 2. ELECTRICAL
A. ELECTRICAL CONNECTION
The electrical connection for the EVO is on the bottom of the unit. There is a 1/2” knockout location for an
electrical connection for the heater’s incoming power connection. All electrical wiring must be performed by a
qualied licensed electrician in accordance with National Electrical Code ANSI/NEPA to and/or the Canadian
Electrical Code, Part 1 CSA C22.1, or to the applicable codes and standards. For your convenience, we have
labeled all the points for electrical connections needed to operate the EVO.
The electrical requirements are for standard 208–240 volts, 50/60 Hz 15 Amp service. This unit is wired with #18
awg and internally fused for no more than 3.15 Amps. When the unit is rst powered on, there is a self-setting
of the electronics for 50 Hz or 60 Hz. At every power up, the electronics will take a couple of seconds to com-
pare the pulses of the power to the pulses of the crystal, which is built into the electronics. Then all time-related
functions are correct no matter the power source..
The standard supplied pumps are all 208–240 volt, 60 cycle and are wired to terminals on the heater. In 50 cycle
applications, other pumps may need to be supplied, depending on water conditions. With the 914 controller
there is an ability to program a custom pump delay time, or to use a continuous (no time out) setting. The factory
default is a 1 minute delay to turn off after completing a burn cycle.
B. INTERNAL WIRING CONNECTION
CAUTION
The incoming power shall be connected directly to the labeled, intended
connection points only. Failure to do so may result in an electrical short and
the control board will have to be replaced!
DANGER
IT IS EXTREMELY IMPORTANT THAT THIS UNIT BE PROPERLY GROUNDED!
IT IS VERY IMPORTANT THAT THE BUILDING GROUND IS INSPECTED BY A
QUALIFIED ELECTRICIAN PRIOR TO MAKING THIS CONNECTION!
Terminal 19 in the electrical compartment must be connected to the building ground system.
The incoming 208–240 volt single phase power supply is connected to terminals 18 through 20, which is factory
wired to the external box on the bottom of the appliance.
It is important that the electrical power is not turned on at this time. Double check all connections and then turn
the power on. The display that is provided with the EVO should now be reading the Setpoint temperature. Note:
See Start-Up Procedures (Part 6, Page 23) to change the temperature setting or run the appliance.
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