Operation; Enabling Override Schedule - Johnson Controls TEC2604-4 Installation Instructions Manual

Table 1: Installer Configuration Menu (Part 5 of 5)
Parameter Description and Default
Appearing
on Display
Min pos Sets the minimum position for the
OA dampers on the economizer.
These dampers are energized to
minimum position when the fan
(Terminal G) is energized and the
thermostat controller is in the
Occupied mode. When the
schedule is in the Unoccupied
mode, the minimum position is 0%.
Default: 0.0%
C mech Determines whether to allow
mechanical cooling (compressor
operation) if free cooling
(economizer operation) cannot
maintain the cooling setpoint.
Default: off
2 Establishes the mixed air
Mix stpt
temperature when operating in the
economizer mode.
Default: 55.0°F/13.0°C
MS temp Displays the mixed air temperature.
Requires that an MS be installed
and connected.
Default: N/A
1. When adjusting the numeric value, press the UP or DOWN arrow key to change the value by single increments; press and
hold the UP or DOWN arrow key to change the numeric value in increments of ten.
2. When adjusting the temperature, press the UP or DOWN arrow key to change the value in 0.5F°/0.5C° increments; press
and hold the UP or DOWN arrow key to change the value in 5.0F°/5.0C° increments.

Operation

Programming/Operating the TEC2604-4 or
TEC2604-4+PIR Thermostat Controller
Once the thermostat controller is configured via the
Installer Configuration Menu, its operating parameters
can be programmed via the Main User Menu. Access
this menu by pressing the MENU key during normal
thermostat controller operation. The Main User Menu
contains the basic operating features of the thermostat
controller.
The Main User Menu also uses Auto Help, which is
displayed automatically in the menu when there is a
pause in programming activity. To exit Auto Help,
continue with the programming selection. When the
thermostat controller is in the Main User Menu and is
left unattended for 45 seconds, the menu reverts to the
Status Display Menu.
12 TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked Multi-Stage Economizer Thermostat
Controllers Installation Instructions
Selection Options
Range: 0.0 to 100.0% equals 0 to 10 VDC output range
% OA Setting for 0 to 10 VDC
Actuator
(0.0%) 0%
(5.0%) 5%
(10.0%) 10%
(15.0%) 15%
(20.0%) 20%
(25.0%) 25%
(30.0%) 30%
(on): Typically applies when the MS is installed before the
mechanical cooling refrigeration coils in the mixing plenum. In this
scenario, mechanical cooling is allowed when free cooling cannot
maintain the cooling setpoint.
(off): Typically applies when the remote Mixed air Sensor (MS) is
installed after the mechanical cooling refrigeration coils. In this
scenario, mechanical cooling will never operate at the same time as
free cooling.
Range: 50.0°F/10.0°C to 90.0°/32.0°C
The mixed air temperature can be used to help service and
troubleshoot the equipment and the economizer operation. The
mixed air temperature is only accessible via the Installer
Configuration Menu.

Enabling Override Schedule

Note: Enabling Override Schedule only appears when
in the Unoccupied Mode.
The override schedule prompt only appears when the
thermostat controller is in the unoccupied state. This
menu selection gives the user the option of overriding
the unoccupied setpoints with the occupied setpoints
for the amount of time specified under the TOccTime
parameter. See the Configuring the TEC2604-4 or
TEC2604-4+PIR Thermostat Controller section.
Note: If one of the digital inputs is configured to
operate as a remote override contact, this menu is
disabled.
Setting for 2 to 10 VDC
Actuator
0 to 20%
24%
28%
32%
36%
40%
44%