NTI Ti100-200 Installation And Operation Instructions Manual page 37

Ti Series
Simplified Wiring Connections
Table 11-1 Line Voltage Field Connections
Connection Color
L1
Black
(120VAC)
PUMP Ap Purple
PUMP C1 Blue
L2
White
(Neutral)
Ground Green
Table 11-2 Low Voltage Field Connections
Connection Description
DHW Demand – Input requiring contact with Common terminal "C" to initiate a demand for DHW. Contact
made via an isolated end switch (dry contact) from an Aqua-stat located in an Indirect Fired Water Heater for
A
Standard (non-Combi) Trinity boilers. Contact made via the isolated end switch of the factory supplied DHW
flow switch for Combi boilers.
Input Common – Common contact for inputs "A" and "T".
C
Space Heat Demand – Input requiring contact with Common terminal "C" to initiate a demand for Space
Heating. Contact is made using an isolated end switch (dry contact) via thermostat, zone controller or other
T
device. Note: contact must be an isolated dry contact, i.e. digital thermostats cannot be directly connected to
contacts T and C.
Outdoor Temperature Sensor – A wall mountable OD Sensor is included with each boiler. When connected
O
to terminals O and D, the control will indicate the outdoor temperature and adjust the boiler temperature set
D
point during a Space Heat demand, see Section 12.0 for details.
Description
Location for connecting line voltage of the power supply. Note; most installation codes require
the installation of a service switch to break line voltage to the appliance.
120VAC output to the DHW circulator; powered during a demand for DHW (A-C contact
closure). For Combi boilers the Purple wire is internally routed to the internal DHW diverter
valve.
120VAC output to the Boiler/Primary Loop circulator; powered during a demand for Space Heat
(T-C contact closure) and during a demand for DHW on Combi models only. On non-Combi
models the C1 circulator is disengaged during a demand for DHW. configurations, see Section
2.0.
Location for connecting neutral of the power supply and all circulators.
Location for connecting earth ground and for grounding all of the circulators.
Installation and Operation Instructions │Trinity
OD
Sensor
DHW Aquastat / or
Combi Flow Switch
37