
Chapter 9: Ventilation and Cooling
Status
Select
On
for the variable output to be used in minimum ventilation.
Cycle Time
If the variable output is used in minimum ventilation, correctly set its minimum
ventilation Cycle Time.
Fan Stages: How it Works
The controller has 8 fan stages which operate in a sequence to increase the level of ventilation as the
room temperature increases. Each stage can activate two variable outputs, on/off outputs, and a combi-
nation of timer relays for cooling purposes. A fan stage is activated when the room temperature reaches
its start temperature and is disabled when the room temperature decreases to its stop temperature.
Operation of fan stages
Start temperatures of fan stages are defined with respect to the set point and with respect to each other.
This means that when one of these values is adjusted, all the consecutive values are adjusted by the
same amount. For example, if the set point is increased by 1°F, the start temperature of all fan stages will
be increased by the same amount.
Timer-based relays in fan stages
Fan stages can activate relays that operate following a timer (On and Off Times). This is useful to activate
misting units in timer mode while a specific fan stage is active.
890-00081
Expert VT-110
35
Summary of Contents for Expert VT-110
Page 1: ...Expert VT 110 User Manual 890 00081 Version 24 REV 19...
Page 6: ...NOTES 6 890 00081 Expert VT 110...
Page 10: ...NOTES 10 890 00081 Expert VT 110...
Page 12: ...NOTES 12 890 00081 Expert VT 110...
Page 22: ...NOTES 22 890 00081 Expert VT 110...
Page 26: ...NOTES 26 890 00081 Expert VT 110...
Page 32: ...NOTES 32 890 00081 Expert VT 110...
Page 46: ...NOTES 46 890 00081 Expert VT 110...
Page 50: ...Chapter 13 Stir Fan 50 890 00081 Expert VT 110...
Page 52: ...NOTES 52 890 00081 Expert VT 110...
Page 64: ...NOTES 64 890 00081 Expert VT 110...
Page 76: ...NOTES 76 890 00081 Expert VT 110...
Page 78: ...NOTES 78 890 00081 Expert VT 110...
Page 79: ...A Worksheets 890 00081 Expert VT 110 79...
Page 80: ...Appendix A Worksheets 80 890 00081 Expert VT 110...
Page 81: ...Appendix A Worksheets 890 00081 Expert VT 110 81...