NTI FTVN - Parallel Shift of Reset Curve; Auto Boost

63
Part 9 - Controls
(Only applicable when using NTI room sensor)
The end user can choose from ve predened time programs to
heat according to his wishes. When a time program is activated,
the boiler will operate in the desired time periods to maintain
the room temperature at comfort temperature level. Outside
these periods, the boiler operates at a reduced temperature
level.
0-24h Mo-Su 00:00 – 24:00
P1
Family
Program
Mo-Th 06:00 – 22:00
Fr-Sa 06:00 – 23:00
Su 07:00 – 22:00
P2
Program
without
lunch
Mo-Th 06:00 – 08:00 16:00 – 22:00
Fr 06:00 – 08:00 15:00 – 23:00
Sa 07:00 – 23:00
Su 08:00 – 22:00
P3
Program
with
lunch
Mo-Th 06:00 – 08:00 11:30 – 13:00 16:00 – 22:00
Fr 06:00 – 08:00 11:30 – 23:00
Sa 06:00 – 23:00
Su 07:00 – 22:00
6-22h Mo-Su 06:00 – 22:00
EXT
Time program dened by external source (app or room
unit). The details can not be displayed on the boiler
display.
Time program dened by external source (app or room unit).
The details can not be displayed on the boiler display.
Time programs heating are active only with NTI Room
Thermostat or Sensor
Table 28 - Time programs heating
NOTICE
O. Automatic Summer / Winter Changeover
When this function is activated, the boiler automatically
switches from “winter” mode ( + ) to “summer” mode
( ), based on outdoor temperature conditions.
This means that the appliance can independently activate or
deactivate the heating mode.
The criteria for the change are:
If the outdoor temperature is more than 1°F above the desired
summer / winter switchover temperature during 5h (delay
time), the boiler goes from winter to summer mode.
If the outdoor temperature is more than 1°F lower than the
desired summer / winter switchover temperature during 5h
(delay time), the boiler will go from summer to winter mode.
Summer / winter changeover temperature
External temperature criterion to switch from winter operation
to summer operation, factory setting is 68 °F.
The room temperatures (both zones 1/2) can be set to dierent
setpoints. These setpoints become eective with the selected
operating mode and the time program, so that dierent
temperature levels can occur in each zone. The range of
adjustable target values is limited by their interdependence,
which can be seen in the accompanying graph.
Daily setpoint (comfort), factory setting 70°F
Night setpoint (reduced), factory setting 61 °F
(Only applicable when using NTI room sensor)
Figure 68 - Day and Night setpoint
M. Room Temperature Day /Night
N. Time Programs – Heating Schedule