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8. Operation
52
8.18 Activating SUMMER function
To activate SUMMER function and charge DHW storage tank in the summer
without central heating, set SUMMER mode to Summer: Summer/Winter >
Summer mode
ALL HEATING DEVICES MAY BE DISABLED IN SUMMER MODE.
MAKE SURE THE BOILER WILL NOT OVERHEAT.
If the weather compensator is connected, SUMMER mode can be activated
automatically by setting Auto allowing for SUMMER mode ON temperature and
SUMMER mode OFF temperature.
8.19 Mixing valve circuit settings
The first mixing valve settings can be modified in:
Menu > Mixing valve 1 settings
Settings for the remaining mixing valves are available in the following menu
items and are identical for each circuit.
•
Setting the mixing valve without weather compensator. Manually set
water temperature in the mixing valve heating circuit with Mixing valve
temperature setpoint, e.g. 50°C. The value should enable reaching a
required room temperature. With the room thermostat installed, set the
value the mixing valve temperature setpoint is reduced by the thermostat
with Mixing valve room thermostat, e.g. 5°C. Select the value by trial and
error. Room thermostat may be a standard ON/OFF thermostat or a room
temperature controller When the thermostat is tripped, the mixing valve
circuit temperature setpoint is reduced, and with a correctly selected
reduction value, the temperature increase in the heated room is reduced.
•
Setting the mixing valve with weather compensator, without room
temperature controller. Set Mixing valve outdoor temperature compen-
sation to ON. Select the outdoor temperature compensation curve as per
8.20. With Curve translation, set room temperature setpoint, using the
following equation: Room temperature setpoint = 20°C + heating curve
translation. The room thermostat can be installed in this configuration to
compensate the heating curve inaccuracy and if the heating curve value
selected is too high. Set the mixing valve temperature setpoint decrease
by thermostat to e.g. 2°C. When the thermostat is tripped (contacts
open), the mixing valve circuit temperature setpoint is reduced, and with
a correctly set reduction value, the temperature increase in the heated
room is reduced.
•
Setting the mixing valve with weather compensator and room tempe-
rature controller. Set Mixing valve outdoor temperature compensation
to ON. Select the outdoor temperature compensation curve as per 8.20.
The controller automatically translates the heating curve depending
on the room temperature setpoint. The controller relates the setpoint
to 20°C, e.g. for room temperature setpoint = 22°C, the controller will
translate the heating curve by 2°C, for room temperature setpoint =
18°C, the controller will translate the heating curve by -2°C. In some
cases, the heating curve translation might require further adjustments.
The room thermostat in this configuration may reduce the heating circuit
temperature by a constant value, if the room temperature setpoint is
reached. The heating circuit temperature can be corrected as described
above (not recommended) or automatically. Do not use both functions
Leader in pellet boilers
simultaneously. Room temperature is automatically corrected as follows:
Correction = (Room temperature setpoint – measured room temperature)
x room temperature coefficient /10 Mixing valve temperature setpoint
is increased by (22°C - 20°C) x15/10 = 3°C. Determine the correct Room
temperature coefficient. The higher the coefficient value, the higher
the boiler temperature correction setpoint. If set to „0", the mixing valve
temperature setpoint is not corrected.
NOTE: IF THE ROOM TEMPERATURE COEFFICIENT IS TOO HIGH,
ROOM TEMPERATURE MAY FLUCTUATE
8.20 Outdoor temperature compensation
Depending on the measured outdoor temperature, both the boiler temperature
setpoint and the mixing valve circuit temperature setpoint may be automatically
controlled. With a correct heating curve, the heating circuit temperature is
determined automatically based on the outdoor temperature. With a correct
heating curve, the room temperature will be constant irrespective of the
outdoor temperature.
Note: when selecting the heating curve, temporarily exclude the room thermo-
stat effect on the controller, whether the room thermostat is installed or not, by
setting the following parameter:
Mixing valve 1 settings > Mixing valve room thermostat = 0.
If the room temperature controller is installed,
set Room temperature coefficient = 0.
Guidelines for correct heating curve settings.
•
floor heating 0.2 -0.6
•
radiator heating 1.0 - 1.6
•
boiler 1.8 – 4
•
Guidelines for correct heating curve settings:
•
if the room temperature increases with the decrease in outdoor tempera-
ture, the heating curve value is too high,
•
if the room temperature decreases with the decrease in outdoor tempera-
ture, the heating curve value is too low,
•
if at low outdoor temperature, the room temperature is correct, and at
high outdoor temperature, the room temperature is too low - increase
Heating curve translation and select lower heating curve,
•
if at low outdoor temperature, the room temperature is too low, and at
high outdoor temperature, the room temperature is too high - decrease
Heating curve translation and select higher heating curve. Poorly
insulated buildings require higher heating curves, whereas properly
insulated buildings require lower heating curves. Temperature setpoint,
calculated based on the heating curve may be increased or decreased by
the controller if it falls outside the temperature limit for each circuit.
ecoMAX860P3-S – Simple Controller User Manual – EN 12.17
.
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