Features and Benefits
2.interface with Trane Tracer™ building management system
3.interface with a generic (non- Trane) building management system. All setup parameters are preset from the factory, requiring less
The unit mounted Human Interface and the Remote Human Interface Panels' functions are identical, with the exception of the Service mode which is not available on the Remote Human Interface Panel. This common interface feature requires less time for building maintenance personnel to learn to interact with the unit.
All air handler control parameters are adjustable and can be setup through the Remote Human Interface Panel such as, but not limited to: system on/off, demand limiting type, night setback setpoints, and many other setpoints. No potentiometers are required for setpoint adjustment, all adjustments are done through the Remote Human Interface keypad.
Up to 56 different air handler diagnostic points can be monitored through the human interfaces such as: sensor failures and loss of supply airflow. No special tools are required for servicing the unit. All diagnostic displays are available in clear English at the Remote Human Interface and will be held in memory, so that the operator/service person can diagnose the root cause of failures.
Figure 10. Statitrac
Statitrac™ Direct Space
Building Pressurization
Control
Trane Statitrac™ control is a highly accurate and efficient method of maintaining building pressure control with a large air handler.
Building space pressurization control is achieved with a 100 percent modulating exhaust system that features a single forward curved fan, with modulating discharge dampers that operates only when needed or a 100% modulating plenum return fan with airfoil wheel that operates continuously with the supply fan. Most of the operating hours of the 100 percent modulating exhaust system are at part load, resulting in energy savings.
Statitrac, with the 100 percent modulating exhaust system, provides comfort and economy for buildings with large air handler systems. Statitrac, with the 100% modulating plenum return fan provides comfort and space pressure control in more demanding applications with high return static pressure, and applications requiring duct returns.
Statitrac control with exhaust fan is simple! The space pressure control turns the exhaust fans on and off as required and modulates exhaust dampers, or VFD speed, to maintain space pressure within the space pressure deadband. Economizer and return air dampers are modulated based on ventilation control and economizer cooling request.
The unit mounted Human Interface Panel can be used to:
1.adjust space pressure setpoint
2.adjust space pressure deadband
3.measure and read building static pressure
The modulating exhaust system maintains the desired building pressure, while saving energy and keeping the building at the right pressure. Proper building pressurization eliminates annoying door whistling, doors standing open, and odors from other zones. The Statitrac™ direct space building control sequence will also be maintained when a variable frequency drive is used.
Statitrac Control with Plenum Return Fan is State of the Art!
Other manufacturers utilize a fan tracking control scheme whereby the return fan speed tracks the supply fan speed in a linear fashion. This scheme works well at minimum and maximum CFM airflow. However, due to the dissimilar performance characteristics of the supply and return fan, building pressure is difficult to control at points between minimum and maximum CFM airflow.
The Trane return fan/building pressurization control system eliminates the effects of dissimilar supply/return fan characteristics experienced in a linear tracking control system by modulating the exhaust dampers based on space pressure, the return/economizer dampers based on ventilation requirements, and the return fan speed based on return plenum static pressure. The supply fan, return fan, exhaust damper, and return/ economizer damper systems act independently from one another to maintain comfort and building pressure.
The return fan operates whenever the supply fan is in operation. The unit exhaust dampers are modulated in response to the space pressure signal to maintain space pressure within the space pressure deadband. The unit economizer and return air dampers are modulated based on ventilation control, minimum outside air economizer position, and economizer cooling request. The return fan speed is modulated based on a return duct static pressure deadband control. Using the unit mounted Human Interface Panel you can:
1.adjust space pressure setpoint
2.adjust space pressure deadband
3.measure and read building space pressure
4.measure and read return duct static pressure.
Proper building pressurization eliminates annoying door whistling, doors standing open, and odors from other zones.
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