Table 3: Terminal identification (See Wiring diagrams
for details)
FunctionTerminal
label
TEC3030,
TEC3031,
TEC313x
TEC3330,
TEC3331
TEC3630,
TEC3631
NET+ n/a Not connected Field bus+/N2+
NET- n/a Not connected Field bus-/N2-
NET COM n/a Not connected Isolated common
for field bus
1 RH needs to be connected for W1 and W2 to energize. For
heating systems with an isolated power supply, connect RH
to the R terminal of the heating system. For systems that
switch the hot supply to the heating commands, connect the
jumper to 24 V. For systems that switch the neutral supply to
the heating commands, connect the jumper to COM.
2 For the networked models, the common terminals, which
do not include NET COM, are internally connected and can
be used for all inputs and outputs. For the wireless models,
the common terminals are connected and can be used for all
inputs, outputs, and 24 VAC ground or common.
TEC3000 Series Networked and Wireless Single- or Two-stage Economizer Thermostat Controllers Quick Start Guide 5