MINI ULTRA ELECTRIC BOILERS Installation and operating manual (Revision: May 2015)
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4.3 OPERATION OF THE INTERFACE
The controller uses four push buttons at the bottom
of the display to select and adjust the parameters.
The button
is used to access to the
configuration menu and confirm a selection.
The
buttons are used to select an
item or adjust a value.
The
button enables the illumination of the display
under two different modes.
The default mode will enable the illumination of the
display for a period of 10 sec. each time a button is
pressed. If the
is pushed, the light will be
continuously illuminated. Just press the button to
change the mode of activation.
Figure 10 : UltraSmart Control Module
4.4 OPERATION IN “FIXED BOILER
TEMPERATURE SET POINT”
For installation where the boiler target temperature
shall be maintained at a fixed temperature that will
not vary in relation to the outdoor temperature, the
sequence of operation will be as follow:
On a call for heat from the room thermostat, the
circulating pump will start and the boiler will activate
the number of stages required to get to and maintain
the outlet temperature of the boiler near the selected
target temperature. A rotation of the stages based
on an equal time period of operation is provided.
N.B. The supplied outdoor temperature sensor shall
not be connected before applying the electrical
power to the unit.
4.5 OPERATION WITH “OUTDOOR RESET”
For installation where the boiler target temperature
shall
modulate
in
relation
to
the
outdoor
temperature; when the outdoor temperature gets
colder, the boiler target temperature will increase.
On a call from the room thermostat, the circulating
pump will start and the boiler will activate the
number of stages required to get to and maintain the
outlet boiler temperature near the target temperature
established by the controller according to the
outdoor temperature. A rotation of the stages based
on an equal time period of operation is provided.
N.B. The supplied outdoor temperature sensor must
be connected before applying the electrical power to
the unit.
The boiler target temperature will be calculated by
the controller in relation to the parameters selected
in the menu
and the
maximum target temperature required when the
outdoor temperature will get to -10F (-23C). The
“STD” curve corresponds to the default maximum
temperature for a typical system and this value can
be modified from the “MIN” to “MAX” value shown on
the following tables.
The following tables show the values of the target
temperature that will be obtained in relation to the
outdoor temperature.
