BTH Electric Boilers USE & CARE MANUAL (Revision Feb. 2010), Page 8.
ADJUSTMENTS OF THE CONTROL MODULE
INTRODUCTION
The MINI Ultra boiler is mainly designed to be installed
on applications where the water of the heating system
flow directly from the boiler to the heating distribution
system (Standard parallel Piping system)
Two operation modes are then offered:
Design-Mode 1: For installation where the boiler
target temperature shall be maintained at a fix
temperature that will not vary in relation to the
outdoor temperature.
On a call for heat from the room thermostat, the
circulating pump will start and the boiler will
activate the number of stage required to get to
and maintain the outlet temperature of the boiler
near the selected target temperature. A rotation of
the stages based on a time period is provided.
Design-Mode 4:
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 a time period is provided
DISPLAYED INFORMATION
The electronic control use an LCD display to
make all adjustments and to visualize the
operation of the system. It uses three push
buttons (Item, p, q) to select and adjust the
parameters.
Shown when the pump is
running.
1 2 Shown when
stage 1and/or 2
are in operation
oF, oC Units.
OPERATION OF THE INTERFACE
All of the items displayed by the control are
organized into two menus. These menus are
listed on the upper right hand side of the display
(View, Adjust). The default menu for the control
is the View menu. To select the Adjust menu,
press and hold simultaneously all three buttons
(Item, p, q) for 1 second. The display then
advances to the Adjust menu and the Adjust
segment is turned on in the display. The display
will automatically revert back to the View menu
after 20 seconds of keypad inactivity. Once in a
menu, there will be a group of items that can be
viewed within that menu.
The abbreviated name of the selected item will be
displayed in the item field of the display
“DEM”will be shown when a heat demand from
the thermostat will appear.
To view the next available item, press and release
the Item button.
“BOIL OUT”: Real boiler water temperature
leaving the boiler
“BOIL TARGET”: Target temperature that the
boiler will try to maintain. The display will show ”--
-“when no demand is present.
“OUTDOOR”: The temperature at the sensor
located outside the building if installed (Not
compulsory in Design-Mode1).
ADJUSTMENT PROCEDURE
To make an adjustement to a setting in the
control, begin by selecting the Adjust menu by
pressing and holding simultaneously all three
buttons (Item, p, q). Then select the desired
item using the Item button. Finally, use the por
qbutton to make the adjustment.
VIEW
180F
BOIL
TARGET
DEM
12
34
Item
Menu
Statut
Paramètre
Aux Dem
