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(°F)
212
194
176
158
140
122
104
86
68
11 .11 .10 Maximum DHW setpoint
This parameter allows you to specify the maximum domestic hot
water setpoint that is possible: range 120°F (49°C) - 140°F (60°C),
default 120°F (49°C).
11 .11 .11 Reset flue hour counter
In case of E091 error it is suggested that the contractor performs an
inspection in the boiler to check the heat exchanger status; at the
end of the inspection the contractor will set the flue hour counter
parameter to 1 in order to start the reset it.
At the end of this procedure the value automatically returns to 0.
11 .11 .12 Auxiliary output
Default 0= jumper X21.1-2 presence. W-R input active when OT
presence. Or jumper not present : second pump handling enables.
11 . 1 1 . 1 3 Night Setback and Outdoor Reset Correction
See Section 11.12.
11 . 1 1 . 1 4 CALL FOR SERVICE
The function is enabled with parameter = 2. In this condition, at
the end of the operating period set with the SERVICE EXPIRE
parameter, the display starts to show the message CALL SRV for
1min every 10 min, indicating the need to call a qualified technician.
SERVICE EXPIRE
This parameter allows you to set the number of weeks of boiler
operation (factory default value = 52 weeks), before the CALL FOR
SERVICE signal appears on the display.
In the INFO MENU it is possibile to check how many days have
passed since the appearance of the CALL FOR SERVICE
MESSAGE (see "11.10 Access to the INFO menu").
11 .12 Setting the outdoor reset curve with an
outdoor sensor
Outdoor temperature reset only works with the outdoor air sensor
connected, therefore, after installation, connect the outdoor air
sensor to the relative connections on the boiler terminal board.
This enables the outdoor temperature reset function.
The temperature measured by the outdoor temperature sensor is
displayed as shown below.
The user can program the desired supply temperature based
on the heat transmitter that will be used in the installation. Once
the outdoor sensor is connected to the control board, the water
temperature of the boiler will adjust to run the boiler more efficiently
3.0
(°C)
100
90
T80
80
70
60
50
T45
40
30
20
20
15
10
5
0
-5
8 6
9 5
0 5
1 4
2 3
3 2
RIELL
OUTDOOR TEMPERATURE RESET CURVES
2.5
2.0
1.5
-10
-15
-20
-25
-30
-35
4 1
5
4 -
13 -
22 -
31 -
OUTSIDE TEMPERATURE (°C)
and provide greater comfort to the living space.
NOTICE: The DHW temperature is independent from the outdoor
air sensor.
Selecting the offset heating curve
The offset heating curve maintains a theoretical ambient
temperature of 68°F (20°C) at outdoor temperatures ranging from
68°F to -4°F (+20°C to -20°C). The choice of the curve depends
on the rated minimum outdoor temperature (of the geographical
area) and the rated delivery temperature (on the type of system)
and must be carefully calculated by the installer using the following
formula using the correct values in °F or °C:
Nominal supply Temp. - Tshift
Curve
=
selection
72°F (22°C) - min. external design Temp.
Tshift = 86°F (30°C) standard systems (radiators)
77°F (25°C) infloor systems
If the calculation generates an intermediate value between two
curves, choose the nearest offset heating curve to that value.
E.g.: if the value obtained by the calculation is 1.3, it lies between
curve 1 and curve 1.5. In this case, select the nearest curve, i.e.: 1.5.
Using the front control it is possible to set the curve:
− access the parameter menu as described in "11.11 Access to
the PARAMETER menu" page 47
− select the parameter "OTD CURVE" pressing the "MODE/OK"
button
− the display shows the value of the selected parameter. To modify
it rotate one of the two knobs.
The settable values of curves are:
- standard system: 1.0, 1.5, 2.0, 2.5, 3.0
- floor system: 0.2, 0.4, 0.6, 0.8.
− Confirm the parameter value by pressing the "MODE/OK"
button.
The programming complete, press the "MENU/RESET" button to
exit from the parameter menu and come back to the main page.
TYPE OF HEAT REQUEST
If a room thermostat is connected to the boiler
The room thermostat makes a heat request when its contact closes,
and stops the request when its contact opens. Though delivery
temperature is automatically calculated by the boiler, the user may
manually override it.
When the outdoor thermistor is connected the HEATING SET
POINT will no longer be displayed if the outdoor sensor is
connected, but just a value that can be set from 77°F to 59°F as
required by turning the right knob.
50
1.0
0.8
0.6
0.4
0.2
-40
-45
-50
-55
-60
(°C)
40 -
49 -
58 -
67 -
76 -
(°F)
OTD C
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