TFTN 085-199 Installation and Operation Manual
65
Table 12-2 Low Voltage Wiring
(…Continued)
Connection
Description
AUX2 NTC
AUX2 SENSOR INPUT
–
function is determined by the setting of
Auxiliary Sensor 2 (24.6.2):
•
DHW Recirc
–
input for a temperature sensor installed in a DHW recirculation loop, so that the
boiler can directly control the heating of a recirculation loop connected to the DHW IWH.
•
Buffer Tank
–
input for optional buffer tank temperature sensor, so that the boiler can directly
control the temperature of an external buffer tank.
Sensor must be 10k beta = 3977 NTC; an optional strap-on System Sensor is available from NTI
(P/N 84010).
BUS
B
BUS COMMUNICATION
–
provides a link to the communication port of the main PCB of the boiler.
Connection is used to connect to other NTI devices such as NTI Room Sensors, NTI Zone Controller
(N-Link ZC3), or to cascade to other NTI boilers. Take care to maintain the same polarity of B and T
connections at each device.
T
BUS
B
T
