Operation In Dual-Energy - COMBOMAX ULTRA Installation Use And Care Manual

4.7 OPERATION IN DUAL-ENERGY.

In Dual-energy mode, the display will indicate that
this mode is active in showing the icon
If it is not shown, check the position of the switch
located at the back of the controller. It must be set to
"Bi-Energ" position (fig.7).
NOTE: The controller will have to be reset to save
the new mode of operation. Just turn the power OFF
and back ON to the unit.
Operation in Dual-energy with Electric
When the authorisation signal to operate in
electricity is received, (close contact between
E1&E2), the following icons will be shown.
The circulating pump and the heating elements will
be activated according to the operating parameters
established earlier.
Operation in Dual-energy with the auxiliary
boiler
When the authorisation signal will be absent (open
contact between E1&E2), the following icons will be
shown.
Upon reception of a heat demand on terminals R W
of COMBOMAX ULTRA boiler, terminals P
be energized at 120volts and the pump will be
activated. At the same time, the contact will close on
the "AUX" terminals to activate the auxiliary boiler.
This boiler will be activated when there will be a heat
demand to the R W terminals and/or when its
temperature will be lower than the settings of its own
temperature controls.
If a three way valve is used on the piping as shown
in fig.6, it will change position when the contact will
close on AUX terminals and it will be the end switch
of the valve that will give the signal to the auxiliary
boiler to come on. The water flow will then circulate
only in the auxiliary boiler.
COMBOMAX ULTRA Electric Boiler Installation, Use and Care Manual
Manual selection for the electricity or
auxiliary boiler mode.
If the user wishes to manually select the electricity or
auxiliary boiler operation, it can be done in following
the sequence below:

Push on the
following icons will appear
The selection of the dual-energy or electric only
or auxiliary boiler only is made with the
been made it will be registered by pressing the
If the electricity only or auxiliary boiler only has
been selected, the corresponding icon and the
unusual heating mode has been selected.
&P will
1 2
button for 6 sec. and the
button. Once the selection has
or by waiting for 5 sec.
icons will blink to advise the user that an
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(Revision june 2016)