34000 Autry Street, Livonia, MI 48150 • 800.968.5530 • Fax 734.419.0209 • www.hamiltonengineering.com • LIT91127 REV 3/09
Page 24 of 50
5. The EVO Heater shall be installed so the gas ignition system components are protected from
water (dripping, spraying, rain, etc.) during appliance operation and service (circulator
replacement, condensate trap, control replacement, etc.).
START-UP PROCEDURES
C. OPERATING INSTRUCTIONS
D. ADJUSTING THE TEMPERATURE ON THE EVO DISPLAY
1. STOP! Make sure you have read the safety information above.
2. Turn off all electric power to the appliance.
3. This appliance is equipped with an ignition device which automatically lights the burner. Do not
try to light the burner by hand.
4. Turn gas shutoff valve clockwise to “off” The handle will be horizontal; do not force it.
5. Wait ve (5) minutes to clear out any gas. If you then smell gas, STOP! Follow the instructions
from Section B: Lighting Instructions in the safety information. If you don’t smell gas, go to the
next step.
6. Turn the gas shutoff valve counter clockwise to “on” The handle will be vertical.
7. Turn on all electric power to appliance.
8. Set the thermostat to the desired setting.
9. If the appliance will not operate, follow the instructions “To Turn Off Gas To Appliance” Section
F, Page 31 and call your service technician or gas supplier.
The red knob labeled Setpoint is used to set the desired operating water temperature. On a boiler, this will be
based on the leaving water temperature. On a water heater it will be based either on a connected external
(storage tank) sensor, or, if there is none connected, it will operate based on the incoming water temperature.
There are no temperature markings on the knob itself, as the range of this knob is factory-set at 50–159°F for wa-
ter heaters and 50–192°F for boilers. Other special ranges are available by contacting the factory. Any movement
of the knob will be immediately indicated on the temperature display when the appliance is powered on. If other
temperature settings are required, contact Hamilton Engineering, Inc. This is the only function able to be
set by the end-user; all others are set by a special computer program at the factory, or while in service mode. The
display can show either °F or °C as factory-set. Display will indicate “0” when temperature setpoint is reached.
E. SEQUENCE OF OPERATION
DANGER
Water temperature over 125
o
F can cause several burns
instantly, or death from scalds. Children, the disabled,
and the elderly are a highest risk of being scalded.
See instruction manual before setting temperature at
water heater. Feel water before bathing or showering!
Temperature limiting valves are available.
1. When power is rst applied to the control, the control display will read the temperature Setpoint.
The control will initially run through a self-diagnostic routine and then go into its operating mode.
If there is no call for heat, the system will go into an idle state.
2. If the thermostat is calling for heat, the control module will determine if the water temperature
is below the programmed set point value minus the switching differential. It will then initiate a
heating cycle.
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