Johnson Controls TEC2627-2 Installation Instructions And Operators Manual page 3

Wiring
When an existing thermostat is replaced, remove and
label the wires to identify the terminal functions. When
a TEC26x7-2 Series Thermostat is replaced, simply
remove the old screw terminal blocks and reinsert them
onto the PCB of the replacement thermostat.
CAUTION: Risk of Electric Shock.
Disconnect the 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.
IMPORTANT: Make all wiring connections in
accordance with local, national, and regional
regulations. Do not exceed the electrical ratings of
the TEC26x7-2 Series Thermostat.
Table 1: Terminal Identification (See Figure 5.)
Terminal
Number
TEC2627-2
(On/Off or
Floating Control)
4 24 V~ Hot
5 24 V~ Com
6 BO5 Aux
7 BO5 Aux
8 BO3
9 BO4
10 BO1
11 BO2
12 BI1
13 RS
14 Scom
15 BI2
16 UI3
Blank +, –, REF
TEC26x7-2 Series BACnet® MS/TP Networked Thermostats with Two Outputs Installation Instructions
Terminal Label
TEC2647-2
(Proportional
0 to 10 VDC Control)
24 V~ Hot
24 V~ Com
BO5 Aux
BO5 Aux
Blank
AO2
AO1
Blank
BI1
RS
Scom
BI2
UI3
+, –, REF
To wire the thermostat:
1. Strip the ends of each wire 1/4 in. (6 mm) and
connect them to the appropriate screw terminals as
indicated in Table 1 and Figure 5 through
Figure 18.
Note: For more details on wiring the MS/TP
Communications Bus, refer to the MS/TP
Communications Bus Technical Bulletin
(LIT-12011034).
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 MS/TP 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.
5. Reattach the thermostat cover to the mounting
base (top side first).
6. Use a Phillips-head screwdriver to reinstall the
security screw on the bottom of the thermostat
cover.
Function
24 VAC from Transformer
24 VAC (Common) from Transformer
Aux BO (Auxiliary Output)
Aux BO (Auxiliary Output)
Open Heat
Close Heat
Open Cool
Close Cool
Configurable Binary Input 1
Remote Sensor
Sensor Common
Configurable Binary Input 2
Configurable Universal Input 3
MS/TP Bus
3