Note:
The TEC enforces a 2-degree deadband between heating and cooling setpoints. If
a setpoint violates this standard (for example, cooling setpoint is set to 70 with a heating
setpoint already set to 70), the opposing setpoint is modified to comply with this deadband (in
the previous example, the heating setpoint would automatically change to 68).
The occupant has access to an up/down adjustment from the home screen. This adjustment
applies a fixed offset (+/-) to the currently active setpoint, and this offset holds until the occupancy
state of the controller changes. If the user taps the setpoint on the home screen, the icon inverts
and displays white text on a black icon. The offset is held throughout all occupancy periods. For
example, if the TEC is cooling in Occupied mode to an occupied cooling setpoint of 72 and you
raise the setpoint 2 degrees to 74 from the home screen and then select
hold
, then the +2 degree
offset persists through an occupancy change. If the occupancy then changes to unoccupied, with
a setpoint of 80 degrees, the effective setpoint is 82 degrees. This allows the occupant to have a
small amount of control over raising or lowering the temperature, but the building owner can still
set back setpoints during standby and unoccupied periods. When the setpoint is in Hold mode,
pressing the icon again releases the hold and immediately sets the setpoint offset back to 0.
When the TEC is in Min/Max mode (Setpoints/Occ Setpoint Select are equal to Min and Max
Setpoint), the TEC rejects any attempts to change the present value outside of the valid range. If the
present value is outside of the valid range (for example, if the Occ Setpoint Select is switched from
Setpoint Offset to Min and Max Setpoint), the present value is reset to be in the center of the valid
range.
The following table describes the four modes of setpoint operation.
Table 7: Setpoint operation
Mode of setpoint
operation
Details
Occ Setpoint Select =
Setpoint Offset and
Heat Cool Setpoint
Mode = Individual
Setpoints
This is the default mode and the original mode of operation that the
TEC was released with (the next three modes are new). In this mode, the
TEC has a heating setpoint and a cooling setpoint. There is a common
Setpoint Offset (warmer/cooler adjust) that is applied to each setpoint
simultaneously. The range of setpoint adjustment is two-fold:
• There are large constant ranges bounding the individual heating and
cooling setpoints.
• There is also a smaller configurable range limit set to the Setpoint
Offset point (
Control Setup > General > Max Setpoint Offset
).
Occ Setpoint Select =
Min and Max Setpoints
and Heat Cool Setpoint
Mode = Individual
Setpoints
In this mode, the TEC has a heating setpoint and a cooling setpoint. Each
setpoint has a configurable range (
Setpoints > Min Cooling Setpoint,
Max Cooling Setpoint, Min Heating Setpoint, and Max Heating
Setpoint
). The configurable range values are bounded by the larger
constant bounds used in Setpoint Offset mode and are constrained in the
following manner: Min must be below Max and Heating must be below
Cooling, so in order from least to greatest, the values are: Min Heating
Setpoint, Max Heating Setpoint, Min Cooling Setpoint, and Max Cooling
Setpoint.
Occ Setpoint Select =
Setpoint Offset and
Heat Cool Setpoint
Mode = Common
Setpoint
In this mode, the TEC has one setpoint, Common Setpoint, for heating
and cooling. There is also a common Setpoint Offset (warmer/cooler
adjust) that is only applied to Common Setpoint. Otherwise, this setting
works the same as when Occ Setpoint Select = Setpoint Offset and Heat
Cool Setpoint Mode = Individual Setpoints.
33
TEC3000 Series On/Off or Floating Fan Coil Thermostats Installation Guide