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2. Gently push excess wire back into the wall, plug
the wall hole with fireproof material to prevent
drafts from affecting ambient temperature
readings, and install screw terminal blocks back
onto the PCB.
3. Reattach the thermostat cover to the installed
base (top side first) and install the security screw
on the bottom.
Terminal
Y1
Energizes on a call for first stage cooling
Y2
Energizes on a call for second stage cooling
G
Energizes fan in accordance with the selected fan mode
RC
24 VAC from equipment transformer
C
24 VAC (common) from equipment transformer
RH
24 VAC for heating stages
W1
Energizes on a call for first stage heating
W2
Energizes on a call for second stage heating
D1
Configurable digital input
D2
Configurable digital input
RS
Remote room sensor
Scom
Sensor common
OS
Auxiliary/Outdoor air sensor
N2+, N2-, REF
N2 Bus
Y2
Y1
G
Cool 1
Cool 2
Fan
24 VAC
Thermostat Power
Connecting the N2 Bus
To connect the N2 Bus:
1. Observe the polarity when connecting the N2 Bus
wires to the TEC2103-1.
Note: An End-of-Line (EOL) is not needed on the
N2 Bus at the TEC2103-1. However, one EOL is
needed at the BAS (N30, Companion, Network
Control Module).
2. Continue this process for each TEC2103-1 using
the daisy chain wiring method.
Function
RH
W1
RC
C
Heat 1 Heat 2
If using the same power source
for the thermostat and heating
loads, install a jumper
across RC and RH.
Figure 5: TEC2103-1 Wiring Schematic
TEC2103-1 Networked Multi-Stage Thermostat Installation Instructions
!
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.
5-pole left top connector
N2+
N2-
5-pole bottom connector
REF
W2
D2
D1
N2 Device Mapping
When adding the TEC2103-1 to the Metasys system
(Person-Machine Interface [PMI] and Companion
system), you must define the TEC2103-1 as a Vendor
Device (VND). For the NCM, except as noted in
Table 1, Footnote c, do not direct map any points. Run
control of these points through the Control System
(CS) object. See the Setting the N2 Address (N2 addr)
section to set the address for the thermostat.
3-pole right top
connector
C
Y1
G
RC
Y2
RH W1 W2
D1 D2
RS
Scom
Scom
N2+
RS
OS
Metasys, CPN,
Remote
Auxiliary/Outdoor
Room
Sensor
Sensor
OS
REF
N2-
NCM
3
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