Operation Manual

T600MEP-3 Multi-stage Economizer Thermostat Installation Instructions 9
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 is in the Occupied mode.
When the schedule is in the
Unoccupied mode, the minimum
position is 0%.
Default: 0.0%
Range: 0.0 to 100.0% equals 0 to 10 VDC output range
% OA Setting for
0 to 10 VDC
Actuator
Setting for
2 to 10 VDC
Actuator
(0.0%) 0% 0 to 20%
(5.0%) 5% 24%
(10.0%) 10% 28%
(15.0%) 15% 32%
(20.0%) 20% 36%
(25.0%) 25% 40%
(30.0%) 30% 44%
C mech Determines whether to allow
mechanical cooling (compressor
operation) if free cooling
(economizer operation) cannot
maintain the cooling setpoint.
Default: off
(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 never operates at the same time as
free cooling.
Mix stpt
3
Establishes the mixed air
temperature when operating in the
economizer mode.
Default: 55.0°F/13.0°C
Range: 50.0°F/10.0°C to 90.0°/32.0°C
Display MS Displays the mixed air temperature.
Requires that an MS be installed
and connected.
Default: N/A
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.
1. Setting DI1 or DI2 to RemNSB disables schedules and stops the Schedule menu display. Any other setting enables
schedules and the Schedule menu.
2. 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.
3. 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.
Table 2: Installer Configuration Menu (Part 5 of 5)
Parameter
Appearing
on Display
Description and Default Selection Options