TEC2101-3 N2 Networked Single-Stage Thermostat Installation Instructions
6
If an Analog Data (AD) object is overridden by the
Metasys system, all local changes attempted through
the thermostat keypad for that AD object are ignored
until the override is released. For example, if the
Metasys system sends a write command to turn
System Mode Off, and then the occupant selects
System Mode On at the TEC keypad, the TEC ends up
with the System Mode On; however, if the Metasys
system sends an override command to turn System
Mode Off, and then the occupant selects System Mode
On at the TEC keypad, the TEC keeps the System
Mode Off.
Once an override is released, the AD object may once
again be changed through the thermostat keypad, but
the thermostat does not retain any data entered at the
TEC keypad during the override.
Only one of the setpoints (Heating SP or Cooling SP)
can be overridden at a time.
•
The value for Heating SP (ADI-3) and Setback
Heating SP (ADI-5) must stay within the limits
established in the controller by Minimum Heat SP
(ADI-7 read-only) and Maximum Heat SP (ADI-8).
•
The value for Cooling SP (ADI-4) and Setback
Cooling SP (ADI-6) must stay within the limits
established in the controller by Minimum Cool SP
(ADI-9) and Maximum Cool SP (ADI-10 read-only).
If a setpoint is overridden, the TEC, if necessary,
adjusts the other setpoint to maintain the minimum 2 F°
deadband between the setpoints. The setpoints can be
spread farther apart but can never be adjusted closer
than 2 F° apart.
Failure to stay within the limits for a command results in
an N2 Negative Acknowledge (NAK) error from the
TEC2101-3 thermostat.
Overrides take precedence over any local adjustment
or command in the TEC2101-3 thermostat.
You must not have a Relinquish Default for the
setpoints if you want to change them from the
thermostat display.
If there is a Relinquish Default for the setpoints, the
Network Automation Engine (NAE) always has an
Override for either an adjusted value or the Relinquish
Default Value. You should use Operator Override and
Release Operator Override if you want to command the
setpoint and release it to local control.
Once all the NAE commands are released, the
Override Status in the Hardware tab should be False.
At that time, the user should be able to change the
setpoint from the local display.
All overrides are released automatically after
10 minutes of no communications (for example,
network cable is removed from the TEC, causing loss
of network communications).
Setup and Adjustments
Thermostat Operation Overview
Figure 6: Front Cover of Thermostat
70.0ºF
Room Temp
YES
NO
Backlit, plain text
LCD is easy to read
in any condition.
Five keys on the thermostat
make operation easy and intuitive.
LEDs indicate
system activity.
F
IG
:f
rn
t_
v
w
