LP-719 Rev. 000 Rel. 000 Date 6.25.20
54
E. Automatic CH Temperature Control (AUTO)
The Automatic Temperature Control (AUTO) function allows the boiler
to automatically adjust the target temperature of each heating zone to
adapt to outdoor and/or indoor temperature conditions and/or heat
demand cycles.
Select the type of Temperature Control via parameters 4.2.1 (Zone 1),
5.2.1 (Zone 2), or 6.2.1 (Zone 3). The default setting is 3 - Outdoor Reset.
See Table 26.
NOTE:
Automatic Temperature Control is only possible when the
AUTO function is turned ON. To activate AUTO, press the AUTO button
on the control panel, or set parameter 2.2.4 = 1 via the technical menu.
NOTICE
In order for the boiler to detect changes in room temperature it is
necessary to install an HTP Room Sensor. Other thermostats (not
HTP) can only switch the boiler ON and OFF.
Outlet temperature
Low temperature
High tenperature
Outdoor temperature
Setpoint of the
room temperature
°C
°C
73
73
70
70 66
66
86
77
50
32
104
122
140
158
176
194
°F
41
50
59
68
77
3.5 3.0
2.5
2.0 1.8
1.5
1.3
0.8
1.0
0.6
0.4
32
23
14
5
-4
-13 °F
0.8
0.6
1.0
0.4
0.2
Figure 61 - Reset Slopes
Parameters of Automatic CH Temperature Control
Example: Zone 1 - 400 Level Parameters
NOTE:
Zones 2 and 3 can be changed in the equivalent 500 and 600 level
parameters, respectively.
Parameter
Range
Factory
Settings
4
Zone 1
4.2
Zone 1 Settings
4.2.0 Temperature Range
0 = Low Temperature (LT 68-122°F)
1 = High Temperature (HT 86-179°F)
Select the range that best matches the needs of the
heating zone.
1 (HT)
4.2.1 Type of Temperature Control*
0 = Fixed Outlet Temperature - Automatic Temperature Control (AUTO) OFF
1 = Basic Temp. Control (without Optional Room Sensor or Outdoor Sensor)
2 = Indoor Temp. Reset (With Optional Room Sensor)
3 = Outdoor Temp. Reset (With Included Outdoor Sensor or weather from the internet if the
boiler is connected to WiFi)
4 = Indoor and Outdoor Temp. Reset (With Optional Room Sensor and Included Outdoor
Sensor or weather from the internet if the boiler is connected to WiFi)
3
4.2.2
Slope of Outdoor Reset Curve
0.2 - 0.8 (when 4.2.0 = 0)
0.4 - 3.5 (when 4.2.0 = 1)
The greater the slope, the quicker the boiler target
temperature rises as the outdoor temperature
decreases. Applicable when 4.2.1 = 3 or 4.
1.3 (HT)
0.6 (LT)
4.2.3
Parallel Shift of Reset Curve
-12 to +12 (when 4.2.0 = 0)
-25 to +25 (when 4.2.1 = 1)
Provides a means of adjusting (shifting) the calculated
reset boiler target temperature up or down. Applicable
when 4.2.1 = 1, 2, 3, or 4.
0
4.2.4
Room Sensor Influence
0 - 20
Adjusts the influence of room temperature on target
boiler temperature - a higher setting causes a greater
increase to the boiler target temperature as the indoor
temperature drops below room setpoint. Applicable
when 4.2.1 = 2 or 4.
4 (HT)
2 (LT)
4.2.5 Maximum Temperature
Setting
68-122°F (when 4.2.0 = 0)
86-179°F (when 4.2.0 = 1)
179 (HT)
120 (LT)
4.2.6
Minimum Temperature
Setting
68-122°F (when 4.2.0 = 0)
86-179°F (when 4.2.0 = 1)
120 (HT)
80 (LT)
4.7
Zone 1 Regulation Parameters
4.7.5
Auto Boost
0 = OFF
1 = ON
When ON, the boiler automatically adjusts the slope based on the 4.2.2 parameter
setting. The slope increases 10% for every 10 minutes a call for heat is active, and
decreases 1% every minute after the call for heat has been satisfied.
0
Table 26 - Default Parameters for the Heating System Zone 1 - *See the Following Page for Description of 4.2.1
