Johnson Controls TEC2145-4 Installation Instructions Manual page 3

Figure 4: Removing the Screw Terminal Blocks
Wiring
CAUTION: Risk of Electric Shock.
Disconnect power supply before making
!
electrical connections to avoid electric
shock.
CAUTION: Risk of Property Damage.
! Do not apply power to the system before
checking all wiring connections. Short
circuited or improperly connected wires
may result in permanent damage to the
equipment.
Table 1: Terminal Identification (See Figure 5.)
Terminal Number Terminal Label
3 Fan
4 24 V~ Hot
5 24 V~ Com
6 BO5 Aux
7 BO5 Aux
10 AO1
11 Blank
12 BI1
14 Scom
15 BI2
16 UI3
Blank +, -, REF
TEC2145-4 N2 Networked Thermostat Controller with Single Proportional Output and One-Speed Fan
IMPORTANT: Make all wiring connections in
accordance with local, national, and regional
regulations. Do not exceed the electrical ratings of
the TEC2145-4 Thermostat Controller.
When an existing thermostat controller is replaced,
remove and label the wires to identify the terminal
functions. When a TEC2145-4 Thermostat Controller is
replaced, simply remove the old screw terminal blocks
and reinsert them onto the PCB of the replacement
thermostat controller.
To wire the thermostat controller:
1. Strip the ends of each wire 6 mm (1/4 in.) and
connect them to the appropriate screw terminals as
indicated in Table 1 and Figure 5.
2. Carefully push any excess wire back into the wall.
Note: Seal the hole in the wall with fireproof
material to prevent drafts from affecting the
ambient temperature readings.
3. Reinsert the screw terminal blocks onto the PCB.
4. Reattach the N2 communication wires to the
terminal block.
Note: If multiple wires are inserted into the
terminals, be sure to properly twist the wires
together prior to inserting them into the terminal
connectors.
Function
Fan On
24 VAC from Transformer
24 VAC (Common) from Transformer
Aux BO (Auxiliary Output)
Aux BO (Auxiliary Output)
Analog Output 0 to 10 VDC
Blank
Configurable Binary Input 1
Sensor Common
Configurable Binary Input 2
Configurable Universal Input 3
N2 Bus
Control Installation Instructions
3