System Pre-Start Procedures

Discharge Air Sensor Checkout (Honeywell Sensor)

WARNING

Hazardous Voltage!

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

1.Verify that the main power disconnect switch and the control circuit switch 1S2, in the unit control panel, is “OFF”.

2.At the Discharge Air Controller, in the unit control panel, disconnect the wire connected to Terminal T1. Use a digital ohmmeter to measure the resistance across Terminal T and the wire removed from Terminal T1.

3.Use the conversion chart in Figure 37 to convert the measured resistance to an equivalent temperature.

4.Measure the actual temperature at the sensor location. If the measured resistance in step 2 is not within ± 10.0 ohms of the actual temperature, the sensor is out of range; replace it.

Note: Before condemning the sensor, verify that the connecting cable resistance is not excessive. Refer to the “Field Installed Control Wiring” section.

5.Make all necessary repairs and reconnect the duct sensor lead to terminal T1 on the controller.

6.Restore power to the system and turn all control switches to the “ON” position.

Economizer Actuator Checkout

(w/ “Zone” or “Discharge Air” Temp Controller)

The following procedures should be used to verify that the field provided economizer actuator(s) function properly. These procedures are based on using a typical Honeywell actuator. If another type actuator is used, refer to the specific checkout procedures for that actuator.

WARNING

Hazardous Voltage!

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

1.Turn all control switches to the “Off” position to deactivate the Evaporator Fan and the Mechanical Cooling. Verify that the main power disconnect switch for the condensing unit and the control circuit switch 1S2, in the unit control panel, is “OFF”.

2.Verify that the field provided disconnect switch and/or the control circuit switch for the economizer actuator(s) is “OFF”.

3.At the actuator, disconnect the control wires connected to Terminals W, R, B, and Y.

4.Install a jumper across the actuator terminals R-to-W-to-B.

5.Close the field provided disconnect switch and/or the control circuit switch for the economizer actuator(s). If the economizer actuator is working properly, it should drive to mid-position.

6.Open the field provided disconnect switch and/or the control circuit switch for the economizer actuator(s) and remove the jumpers installed in step 4.

7.Reconnect the control wires to the actuator terminals W, R, B, and Y.

8.Restore power to the actuator circuit and turn all control switches to the “ON” position and restore power to the system.

74

SS-SVX09A-EN

Page 73 Page 75
Page 74
Image 74
Trane RAUC-C60, RAUC-C50, RAUC-C30, RAUC-C20, RAUC-C40 Economizer Actuator Checkout, Zone or Discharge Air Temp Controller
Page 73 Page 75

RAUC-C20, RAUC-C40, RAUC-C25, RAUC-C30, RAUC-C60 specifications

Trane, a leader in HVAC solutions, offers innovative air conditioning units designed for superior performance and energy efficiency. Among their advanced products are the Trane RAUC-C30, RAUC-C20, RAUC-C40, RAUC-C60, and RAUC-C50, which cater to various cooling and heating needs in residential and commercial applications.

The RAUC-C series showcases cutting-edge technology, ensuring effective climate control while minimizing energy consumption. These units are equipped with variable-speed compressors, allowing for precise cooling capacities and reduced noise levels during operation. This feature ensures that users can enjoy optimal comfort without the disruptive noise often associated with traditional HVAC systems.

One of the standout technologies used in the RAUC-C series is Trane’s advanced inverter technology. This system intelligently adjusts the compressor speed based on real-time cooling demands, enhancing efficiency and prolonging the unit's lifespan. Additionally, the units come with high SEER (Seasonal Energy Efficiency Ratio) ratings, making them an excellent choice for those looking to lower their energy bills while maintaining a comfortable indoor environment.

The RAUC-C series units are designed with durability in mind. Constructed with robust materials, these air conditioning systems are built to withstand varying weather conditions. Their compact and lightweight design makes installation straightforward, and they can fit seamlessly into a variety of spaces, from residential homes to commercial buildings.

Another key characteristic of the RAUC-C series is their eco-friendly refrigerant, which meets strict environmental regulations. This not only supports sustainability efforts but also ensures efficient cooling performance. Furthermore, their smart technology capabilities enable integration with modern smart home systems, allowing users to manage their cooling settings remotely for added convenience.

Trane's focus on user-friendly interfaces makes these units easy to operate. The intuitive control systems allow users to customize their cooling preferences easily, providing flexibility to adapt to individual comfort needs.

Overall, the Trane RAUC-C30, RAUC-C20, RAUC-C40, RAUC-C60, and RAUC-C50 stand out for their energy efficiency, advanced technology, durability, and user-focused design. These features make them reliable choices for anyone seeking efficient and effective heating and cooling solutions.
Top Page Image Contents