TFTN 085-199 Installation and Operation Manual
79
Table 16-1 CH Setup
Setting
Parameter* Description/Range
Factory
Setting
Zone Selection
NA
Allows selection of the zone that you would like to view/modify;
options are Z1 (zone 1), Z2, Z3 & Buffer Tank. Options extend to Z4, Z5
& Z6 if using an NTI N-Link ZC3 zone controller.
Z1
Max Temperature 4.2.5
Sets the allowable operating outlet water temperature range of the
boiler. (Range = 68-190°F)
140°F
Min Temperature
4.2.6
95°F
AUTO
Temperature
Control Mode
4.2.1
Sets the type of automatic temperature control for zone 1:
Fixed Outlet
–
AUTO Temperature Control is off, boiler operates to the
(manually adjustable) Max Temperature setting.
Basic On/Off
–
the boiler uses the ON/OFF condition of the room
thermostat to boost/reduce the boiler target temperature. With a
starting (first time) boiler target temperature of 136°F, the function
boosts the target temperature by 7°F every 16 minutes (adjustable via
the CH Boost Delay Interval setting) a call for heat is continuously
active. Similarly, the target temperature is reduced 7°F every 16
minutes that the heat call is continuously inactive. The temperature
will boost/reduce a maximum of 3 times (21°F) for a given thermostat
ON/OFF cycle.
Room Temp
–
the boiler target temperature automatically adjusts
between the Min and Max Temperature Settings, based on the input
temperature provided by an optional NTI Room Sensor.
Outdoor Temp
–
The boiler target temperature automatically adjusts
between the Min and Max Temperature Settings, based on the input
temperature provided by the included Outdoor Sensor (or Internet
Weather via WiFi connection).
Room&Outdoor
–
the boiler target temperature automatically adjusts
between the Min and Max Temperature Settings, based upon the input
temperatures provided by an optional NTI Room Sensor AND the
included Outdoor Sensor (or Internet Weather via WiFi connection).
Outdoor
Temp
Buffer Tank
Function
20.0.0/
20.0.7
When enabled, the boiler anticipates the connection of a buffer tank
sensor at the AUX1 or AUX2 NTC input (under
configure setting Auxiliary Sensor 1 or 2 accordingly). The burner, and
buffer tank and boiler pumps, operate to maintain the buffer tank
temperature at the buffer tank target (under Pump Configuration,
configure setting Auxiliary Pump 1 or 2 Selection accordingly). CH and
downstream IWH demands are serviced by the buffer tank.
Off
- Buffer Tank Function is disabled.
Fixed Temperature
- the buffer tank setpoint follows the specific
Buffer Setpoints (Comfort & Reduced), based on the Scheduling
selected.
Variable Temperature
- the buffer tank setpoint follows the setpoint of
the active (or most recent) CH zone demand Target (and DHW Target if
downstream Tank is present). The specific Buffer Setpoints (Comfort &
Reduced) are ignored.
Off
Buffer Setpoint
(Comfort)
20.0.3
Buffer tank setpoint during Comfort time period. (Range = 50-190°F)
120°F
* 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.
