Unit

Setup

(SCR) Motor Speed Control Adjustment Procedure.

In order to make units more convenient and efficient to balance, an SCR (silicone control rectifier) is provided as standard on all fan-powered units.

The SCR is located on the side of the fan control box. To adjust the speed of the motor, the external knob must be rotated either clockwise or counterclockwise depending on the desired speed adjustment.

There is an internal potentiometer (Figure 14) setting on the SCR controller that can be accessed by removing the control box cover. This internal potentiometer is set at the factory to the specific motor voltage.

It may be necessary to adjust this in the field depending on the building’s power factor.

WARNING

HazardousVoltage!

Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout proce- dures to ensure the power cannot be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.

Figure 16 – SCR

Figure 17 – Internal Potentiometer

Max

120 v

208 v–

277 v

347 v

DO NOT SET THIS

POTENTIOMETER

BELOW THE VOLTAGE

OF THE FAN MOTOR.

NOTE: Do not set this potentiometer below the voltage of the fan motor.

Electrically Commutated Motor (ECM)

Trane offers an energy efficient ECM motor as a motor option. Balancing of an ECM motor is accomplished through electronic control adjustments on the ECM control board (see Figure 15). Potentiometer settings for a multitude of CFM settings are given in Charts 4–15. Other potentiometer settings can be determined either by interpolating from these tables or by using the following equation:

CFMsetting = CFMmin + {(Potentiometer Setting) x [(CFMmax - CFMmin)/100]}

There is an LED on the ECM control board, which will blink one time for every 100 CFM of motor setting. For example, the LED on a unit set for 790 CFM will blink 7 times. The LED on a unit set for 800 CFM will blink 8 times.

NOTE:This feature only verifies that the CFM is set properly. This feature does not indicate at what speed the motor is actually running.

The ECM must be “load tested.” In other words, the fan must be connected to properly test the ECM.

Figure 18 – ECM Control Board

VAV-SVN01E-EN

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Trane Trane, VAV-SVN01E-EN manual HazardousVoltage, Electrically Commutated Motor ECM
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VAV-SVN01E-EN, Trane specifications

The Trane VAV-SVN01E-EN is an advanced variable air volume (VAV) system designed to optimize indoor air quality and energy efficiency in commercial buildings. This system is part of Trane’s commitment to offering reliable, innovative HVAC solutions that meet the demands of modern architectural designs and energy standards.

One of the main features of the VAV-SVN01E-EN is its ability to control air flow based on occupancy and environmental conditions. This ensures that energy is used efficiently, as airflow can be adjusted to match real-time needs, rather than operating at a constant rate. The integration of intelligent sensors allows the system to adapt dynamically, leading to both reduced energy consumption and improved comfort for building occupants.

The technology behind the VAV-SVN01E-EN includes advanced digital controls and integration capabilities. These controls enable the system to communicate seamlessly with building management systems (BMS), allowing for centralized monitoring and management. This interconnected approach not only enhances operational efficiency but also enables predictive maintenance, helping facility managers identify and address potential issues before they become problematic.

Energy efficiency is further enhanced through the use of VAV technology, which reduces the amount of conditioned air delivered when spaces are unoccupied or when less cooling or heating is required. This tailored approach contributes to lower energy costs and supports sustainability initiatives by decreasing the overall carbon footprint of the building.

Key characteristics of the Trane VAV-SVN01E-EN include its compact design, which facilitates easy installation in existing spaces without significant modifications. The unit is also designed for low sound levels, ensuring that it operates quietly, contributing to a more pleasant indoor environment. Moreover, the VAV system is engineered to be reliable and durable, with rigorous testing and high-quality components ensuring long-term performance.

In summary, the Trane VAV-SVN01E-EN stands out in the field of HVAC solutions, bringing together advanced technology, energy efficiency, and user comfort. Its features are tailored for modern building requirements, making it a preferred choice for facility managers aiming to enhance indoor air quality while reducing operational costs.
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