NTI TFTN - Page 80

Installation and Operation Manual TFTN 085-199
80
Table 16-3 CH Setup – Advanced Settings (Applicable to selected zone)
Setting
Parameter*
Range/Description
Factory
Setting
Zone Selection
NA
See Table 16-1
Z1
Heating Curve
Slope
4.2.2
Sets the slope of the heating curve. The greater the slope, the quicker the
boiler target temperature raises as the outdoor temperature decreases.
Applicable when AUTO Temperature Control Mode = Outdoor Temp or
Room&Outdoor. (Range = 0.2-3.5)
1.1
Heating Curve
Offset
4.2.3
See Table 16-2
0
Auto Slope
Boost
4.7.5
Acts to automatically adjust the slope of the heating curve to better
match the needs of the heating system. The function boosts the boiler
target temperature by increasing the slope 10% every 10 minutes a call
for heat is continuously active, to a maximum of 2X the Heating Curve
Slope setting. While the heat call is satisfied, the slope decreases by 1%
every minute to a minimum equal to the Heating Curve Slope setting.
Off
Room Sensor
Influence
4.2.4
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
AUTO Temperature Control Mode = Room Temp or Room&Outdoor.
(Range = 0-20)
2
Warm Weather
Shutdown
(WWSD)
4.1.0
When set to On, disables the zone 1 heating demand when the outdoor
temperature exceeds the WWSD Threshold for longer than the WWSD
Switch Off Delay time.
Off
WWSD
Threshold
4.1.1
Outdoor temperature where the zone 1 heating demand is disabled – if
WWSD is set to On. (Range = 32-86°F)
68°F
WWSD Switch
Off Delay
4.1.2
Length of time required for the outdoor temperature to exceed the
WWSD Threshold before disabling the zone 1 heating demand. (Range =
0-300min)
60 min
Zone Priority
Level
4.8.5
Sets the priority level for zone 1. Only zones with the same priority level
can operate together. Zones with the highest priority level (lowest
numerically) are given the priority first. The priority is switched to the
zone with the next highest priority level after the Zone Priority Time
elapses. (Range = 1
st
-3
rd
)
Note: zones set with the same priority level will run concurrently if being
call upon simultaneously. Under this scenario, the boiler will operate to
the highest setpoint of the concurrently operating zones.
1
st
Zone Priority
Time
4.8.6
Length of time that the boiler will service a zone with higher priority,
while another zone with lower priority is calling, before switching to
service the zone with lower priority. Setting is common to all zones.
(Range = 0-1440min)
10 min
* Parameter numbers starting with 4 are for Zone 1; substitute the 4 with a 5 (for Zone 2); 6 (for Zone 3); 14 (for Zone
4); 15 (for Zone 5) or 16 (for Zone 6) for equivalent respect zone parameter.