TEC2104-3 N2 Networked Multi-Stage Economizer Thermostat Installation Instructions
3
Wiring
When an existing thermostat is replaced, remove and
label the wires to identify the terminal functions. When
a TEC2104-3 Thermostat is replaced, simply remove
the old screw terminal blocks and reinsert them onto
the PCB of the replacement thermostat.
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 Figure 5.
2.
Carefully push any excess wire back into the wall.
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 thermostat cover to the mounting
base (top side first).
5.
Use a Phillips-head screwdriver to reinstall the
security screw on the bottom of the thermostat
cover.
!
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 TEC2104-3 Thermostat.
Figure 5: Wiring the TEC2104-3 Thermostat
24 VAC
Thermostat Power
Y2
Y1
RC
C
If using the same power source
for the thermostat and heating loads,
install a jumper across RC and RH.
Heat 1 Heat 2
RH
W1
W2
Aux
Aux
Cool 1
Energizes on a Call for First-Stage Cooling
Energizes on a Call for Second-Stage Cooling
Energizes Fan in Accordance with the Selected Fan Mode
24 VAC from Equipment Transformer
24 VAC (Common) from Equipment Transformer
24 VAC for Heating Stages
Energizes on a Call for First-Stage Heating
Energizes on a Call for Second-Stage Heating
Auxiliary Output
Configurable Digital Input 1
Configurable Digital Input 2
Remote Room Sensor
Sensor Common
Outdoor Air Sensor
Mixed Air or Discharge Air Sensor
0 to 10 VDC Economizer Actuator Output
N2 Bus
Function
Y1
Y2
G
RC
C
RH
W1
W2
Aux
DI1
DI2
RS
Scom
OS
MS
EC
+, -, REF
Terminal
DI2
Scom
RS
DI1
Independent Contact
• Lighting
• On/Off Actuation
• Exhaust Fan
OS
Outdoor
Air Sensor
REF
Supervisory
Controller
EC
0
to
10
VD
C
24
V
A
C
Co
m
m
on
Mixed Air or
Discharge Air
Sensor
Cool 2
F
IG:
wrn
g
Y2
Y1
G
RC
C
RH
W1 W2
DI1 DI2
RS
Scom
Five-Pole
Left Top Connector
Three-Pole
Right Top
Connector
Eight-Pole Bottom Connector
OS
REF
-
+
MS
Aux
EC
G
Fan
Remote
Room
Sensor
+
-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
