Automatic Ch Temperature Control (Auto) - NTI FTVN085 Installation Start-Up Maintenance

H. 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 28.
NOTE: Automatic Temperature Control is only possible when the AUTO
function is turned ON. To activate the AUTO Function, set to "ON" via
the User Menu, 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 NTI Room Sensor. Other thermostats (not
NTI) can only switch the boiler ON and OFF.
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
4 Zone 1
4.2 Zone 1 Settings
4.2.1 Type of Temperature Control*
4.2.2 Slope of Outdoor Reset Curve
4.2.3 Parallel Shift of Reset Curve
4.2.4 Room Sensor Influence
Maximum Temperature
4.2.5
Setting
Minimum Temperature
4.2.6
Setting
4.7 Zone 1 Regulation Parameters
4.7.5 Auto Boost
Table 28 - Default Parameters for the Heating System Zone 1 - *See the Following Page for Description of 4.2.1
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)
The greater the slope, the quicker the boiler target
0.2 - 3.5 temperature rises as the outdoor temperature decreases.
Applicable when 4.2.1 = 3 or 4.
Provides a means of adjusting (shifting) the calculated reset
-12 to +12 (when 4.2.0 = 0)
boiler target temperature up or down. Applicable when 4.2.1
-25 to +25 (when 4.2.1 = 1)
= 1, 2, 3, or 4.
Adjusts the influence of room temperature on target boiler
temperature - a higher setting causes a greater increase to the
0 - 20
boiler target temperature as the indoor temperature drops
below room setpoint. Applicable when 4.2.1 = 2 or 4.
68-179°F
68-179°F
When ON, the boiler automatically adjusts the slope based on the 4.2.2 parameter
0 = OFF
setting. The slope increases 10% for every 10 minutes a call for heat is active, and
1 = ON
decreases 1% every minute after the call for heat has been satisfied.
°F
194
176
158
140
122
104
95
86
77
50
32
77 68 59 50 41
Outdoor temperature
Figure 66 - Reset Slopes
Range
Part 9 - Controls
1.0
0.8
0.6
0.4
0.2
32 23 14 5 -4 -13 °F
Factory
Settings
3
1.3
0
4 (when 4.2.0 = 1)
2 (when 4.2.0 = 0)
179
95
0
61