Interface Operation; Domestic Hot Water Demand Prioritisation; Combomax Mode Operation; Control Setup - COMBOMAX ULTRA 12-4.5 Installation Use And Care Manual

4.3 INTERFACE OPERATION

The Ultra Smart™ control access is through four (4)
keys.
Key provides access to the configuration
menu and is also used as an « ENTER key » to
confirm the selection. The two rocking (2) keys
change.
The key light-up the LCD back screen. The
screen will remain lighted until the
depressed again. Depressing any other keys will
light-up the LCD for a default value of 10 sec.
Depressing the key will turn the LCD lighting
OFF.

4.4 COMBOMAX MODE OPERATION

The Ultra Smart™ control manages both the heating
element(s) and circulation pump. It tries to maintain
the boiler tank temperature around the target
temperature shown on the display. When the tank
temperature decrease under the target temperature,
the heating element(s) is turned ON and modulate
trying to maintain the target temperature. On units
equipped with two (2) heating elements, the heating
elements will be used in sequence in order to insure
equal aging.Heating stages are indicated on the
LCD by the darkening of the
On an heat demand, the control will turn the
circulating pump ON if the tank water temperature is
high enough to satisfy the domestic hot water
demands. The following symbol will appear on the
upper right of the display.
on domestic hot water prioritisation). The controller
will stop the circulating pump once the space heat
demand is satisfied or if the boiler temperature drops
too much (see section 4.5)
COMBOMAX™ Installation, use and care manual
allow items selection or value
icon.
(see next section
4.5 DOMESTIC
PRIORITISATION.
The Ultra Smart™ control can manage both heat
and domestic hot water demand. It's program
prioritize domestic hot water production over building
heating in case of low tank water temperature. The
control accomplished this operation by turning the
heating circuit circulation pump OFF until the tank
water temperature return to normal.
The value of the tank temperature decrease under
the established target temperature shown on the
display is adjustable on the configuration menu of
key is
the control.
This function has minimal impact on the building
temperature since typically domestic hot water
demands are of short enough duration that the
building temperature will not be affected.
4.6 CONTROL SET-UP
Since every application presents different heating
and domestic hot water needs, it is important to
properly set-up the COMBOMAX™ Ultra 12 for the
application in order to maximise its performances.
In order to set-up the COMBOMAX™ Ultra 12
control, the installation technician has to access the
Ultra Smart™ control configuration menu in pressing
on the
displayed.
Selecting the function or the value to adjust is by
using
Pressing the
brings you to the next menu.
Table 1 below shows the menus that will appear.
If keys are not depressed for more than 15 sec. the
controller will register the last changes and returns
to normal operation display. Scrolling to the end of
the menus will also return the LCD to normal
operation display.
In case of power failure, function set-up are saved
and restored with when electrical power is returned.
,
(Revision Sept. 2013)
HOT WATER
for 2 sec. until the first menu is
the rocking keys
key confirm your selection an
DEMAND
.
13.
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