NTI TFTN - Page 94

Installation and Operation Manual TFTN 085-199
94
Table 16-14 (b) User Menu (with Zone Selection = DHW)
Setting
Parameter
Range/Description
Factory
Setting
Zone Selection
NA
Allows selection of the zone that you would like to
view/modify; options are Z1, Z2, Z3, DHW, DHW Recirc &
Buffer Tank.
Note: options extend to Z4, Z5 & Z6 if using an NTI N-Link ZC3
zone controller, or for cascade application.
DHW
Modulation Setpoint
24.20.0
Boiler outlet water temperature target during DHW
demands. (Range = 68-190°F)
180°F
Tank Setpoint (Comfort)
24.5.0
See Table 16-6
125°F
Tank Setpoint (Reduced)
24.20.9
Establishes the target temperature of the DHW tank (IWH)
during Reduced time period. Setting is only applicable when
DHW Mode is set to Tank Sensor. (Range = 50-190°F)
125°F
Scheduling
24.5.1
Allows the user to select the type of schedule for heating the
DHW tank.
Disabled – boiler ignores DHW tank demands.
Time Program – tank temperature setpoint toggles between
the Comfort and Reduced setpoints according to the defined
time program (see View/Edit Schedule). Only applicable
when a tank sensor is utilized.
Always Active – tank temperature is always maintained at
the Comfort setpoint (if tank sensor is used), or at aquastat
setpoint if aquastat is used.
Always Active
Operating Mode
(Scheduling*)
NA
See Operating Mode section
Winter
Table 16-14 (c) User Menu (with Zone Selection = DHW Recirc)
Setting
Parameter
Range/Description
Factory
Setting
Zone Selection
NA
Allows selection of the zone that you would like to
view/modify; options are Z1, Z2, Z3, DHW, DHW Recirc &
Buffer Tank.
Note: options extend to Z4, Z5 & Z6 if using an NTI N-Link ZC3
zone controller, or for cascade application.
DHW Recirc
DHW Recirc Setpoint
24.20.6
Establishes the target temperature of the DHW recirculation
loop. (Range = 32-190°F)
115°F
Scheduling
24.5.7 &
24.5.8
Allows the user to select the type of schedule for heating the
DHW Recirculation loop.
Always Active – DHW Recirc temperature is always
maintained at the DHW Recirc setpoint
Time Program – DHW Recirc temperature is maintained at
the DHW Recirc setpoint while the DHW is in Comfort mode
DHW Recirc Time Program – DHW Recirc temperature is
maintained at the DHW Recirc setpoint according to the
defined time program (see View/Edit Schedule).
Note: If a DHW Recirc sensor is used, then the DHW Recirc
pump turns off when the DHW Recirc setpoint is attained -
otherwise the DHW Recirc pump remains on.
Always Active
Operating Mode
(Scheduling*)
NA
See Operating Mode section
Winter