Viconics VT7600 Installation Guide (Current Release 5000 Series PIR Ready) - Manual (Page 34)

34 | PIR Ready VT7600 Series-Installation Guide
min pos
Minimum position
Default value = 0%
Outside air damper minimum position.
Will be active only when fan is on ( G terminal ) and
the internal or remote scheduling is in occupied mode.
When internal or remote scheduling is in unoccupied
mode and/or fan is off, minimum position will be set to
0%
0 to 100 % = 0 to 10 VDC output range
C mech
Mechanical cooling allowed
Default value = Off
In Cooling mode.
Allows the operation of the mechanical cooling if the
free cooling ( economizer ) cannot maintain the
cooling setpoint.
Off Typically applies when the MS ( mixed air
temperature sensor ) is installed after the mechanical
cooling refrigeration coils. In this case, mechanical
cooling will never operate at the same time as free
cooling.
On Typically applies when the MS (mixed air
temperature sensor) is installed before the mechanical
cooling refrigeration coils in the mixing plenum. In this
case, mechanical cooling is allowed when the free
cooling (economizer operation) cannot maintain the
cooling setpoint.
OFF OR ON
mix stpt
Mixed air setpoint
Default value = 55 °F ( 13.0 °C )
Free cooling mixed air setpoint when economizer
mode is enabled.
50 to 90 °F ( 10.0 to 32.0 °C )
MS dis
Display mixed air temperature
Economizer model only, only if
sensor is installed
Used as diagnostic / service help to troubleshoot and
diagnose economizer operation.
Outside air
percentage
0% 5% 10% 15% 20% 25% 30%
Setting for
0-10 VDC
0% 5% 10% 15% 20% 25% 30%
Setting for
2-10 VDC 0 to
20%
24% 28% 32% 36% 40% 44%