CabinetAir PRT

Free Cooling for your Outdoor Cabinet

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Outdoor cabinet cooling for an energy-efficient and noise-optimized operation

The CabinetAir PRT with Direct Free Cooling ensures maximum energy efficiency for cooling your outdoor cabinet. It not only cuts operating costs to a minimum – in connection with 48 V DC it also ensures maximum reliability: if the main power supply fails, backup ventilation with Free Cooling keeps your electronics working without interruption. What’s more, the unit is designed to ensure that the air conditioning keeps all system equipment running quietly.

Outdoor cabinet

Optimized for outdoor cabinets

Free Cooling

Maximum potential savings by using cool outside air

Plug & play

Units immediately ready for connection and operation

Low Noise

Particularly noise-optimized in operation

Product Overview

At a glance

Most important benefits

Active air conditioning keeps the entire outdoor cabinet system running quietly
Huge energy savings with Direct Free Cooling
Plug & Play: Simple installation and removal
Units can be serviced and replaced by the operator's own personnel
(no refrigeration engineers required)

Most important features

System equipment can run at 100 % capacity in all operating conditions (no fluctuations in the performance of IT components)
Outside temperature range from -20 to +60 °C

Most important technical data

Cooling capacity total (kW) 1 – 2

Benefits

Active air conditioning keeps the entire outdoor cabinet system running quietly
Huge energy savings with Direct Free Cooling
Various installation options ensure high flexibility
Automatic restart after power failure
Plug & Play: Simple installation and removal
Fast and easy replacement of units while the outdoor cabinet is still in operation
Units can be serviced and replaced by the operator's own personnel (no refrigeration engineers required)

Features

System equipment can run at 100 % capacity in all operating conditions (no fluctuations in the performance of IT components)
Optimum operating conditions ensure a long life for your system equipment
Compressor mode ensures constant air conditioning on hot days
Outside temperature range from -20 to +60 °C
C100 control system
Integrated fault signaling contacts for alarm signals

Technical Data

Cooling capacity total (kW)	1 – 2
Dimensions	Height (mm): 1,200 Width (mm): 417 Depth (mm): 300
Refrigerant	R134a (GWP: 1,430)

All details about CabinetAir PRT

Climate. Customized.

From standard units to fully customized solutions

The ability to offer such a wide range to customers is the embodiment of our philosophy, "Climate. Customized.". Size, design or control: CabinetAir PRT is a model of adaptability and the shelter units can be precisely adapted to your individual requirements regarding outdoor cabinet cooling. In addition, a variety of options and equipment versions are available to achieve the optimum result.

Learn more about Climate. Customized.

Optimum operational liability for your application

Connectivity for maximum availability

Monitoring and remote diagnosis are available for all units via a web interface. This enables rapid intervention and therefore immediate troubleshooting in all situations. What’s more, our outdoor air conditioner units support numerous communication protocols for integration in building services management systems.

Backup operation

Backup operation for maximum liability

In telecommunications, in particular, high reliability is vital to prevent any loss of network availability. Thanks to the additional 48 V DC power source, backup operation with Free Cooling is available. If the main power supply fails, the Shelter Cooling units continue providing backup cooling to keep your system running reliably.

Available operating voltages:

230 V AC 1ph 50/60 Hz
230 V + 48 V DC backup cooling
48 V DC

Direct Free Cooling

When it comes to reducing energy consumption and costs, Free Cooling offers the largest potential for energy savings. CabinetAir PRT uses filtered outside air to provide optimum air conditioning for the outdoor cabinet. The air conditioning system is operated in Direct Free Cooling mode for most of the year - this creates enormous savings potential. If the outside temperatures rise above the supply air temperature setpoint, an integrated DX system with a compressor automatically provides air conditioning.

Savings with Direct Free Cooling
Efficient air conduction and intelligent control of operating modes enable savings of up to 90 % to be achieved.

Learn more about Direct Free Cooling

Free Cooling

At low outside temperatures, outside air is used directly for cooling. The outside air is conveyed into the interior when the air damper is open. Energy-intensive compressor cooling is not needed when outside temperatures are low. This way, Free Cooling brings you huge potential savings.

Compressor mode (DX)

If outside temperatures are so high that the outside air would no longer help to cool the inside, all cooling is generated using the compressor. Even in this mode, the perfectly harmonized components we use keep STULZ air conditioning units working reliably and efficiently.

Low-noise operation

Optimum air conditioning keeps the entire system running quietly

Especially in the vicinity of residential areas and offices, noise emissions should always be kept to a minimum. CabinetAir PRT is designed to ensure that the air conditioning keeps all system equipment running quietly. Regardless of the outside temperature, the air conditioning system creates ideal operating conditions, drastically reducing the noise level of the system equipment as a whole.

Plug & Play

Simple installation and removal
Fast and easy replacement of units while the outdoor cabinet is still in operation
Units can be serviced and replaced by the operator’s own personnel (no refrigeration engineers required)
All products in the Shelter Cooling series are factory tested, filled with refrigerant and ready for connection and operation right from the start
Reduced installation time and costs
Speedier start-up

Individual installation options

The units are available in three versions for maximum flexibility. Whether you need more space for your IT equipment or protection from vandalism and adverse weather – the CabinetAir PRT will satisfy all your installation requirements.

Reliable operation in any weather conditions

Whether your business-critical system is working in temperatures of up to 60 °C, in ambient air contaminated by particles or in temperatures as low as -20 °C – you can always rely on systems from STULZ.

Control and monitoring

The C100 control system is a microprocessor-controlled I/O controller installed in the control box of the air conditioning unit. An optional operator terminal is required for displaying the operating status and messages, and for changing parameters.

Controlling the various operating modes

Free Cooling function dependent on temperature and humidity
Compressor mode
Backup ventilation on failure of the main power supply
Heating
Operating hours counter for compressors, heaters, and condenser and evaporator fans

Multi-step configuration menu via operator terminal (password-protected)

Values that can be set by the operator: Cooling setpoint, heating setpoint, alarm limit for excessively high and excessively low temperature
For service: Easy configuration and software updates via hardware key

Alarm Manager

Alarms can be canceled automatically or manually to avoid unnecessary service callouts.
In the case of high-pressure alarms, the system is started four times before an alarm is triggered.
Configurable maintenance alarm for filters: Time until next maintenance can be selected as required
Alarm history of the last 40 alarms

Monitoring

Connection to common BMS systems via Modbus RTU interface
Two configurable digital contacts for alarm signals

Options

Thanks to the numerous options available, you can perfectly adapt STULZ units to your particular requirements.

Electric heater
External operator terminal
Connection to common BMS systems via Modbus RTU interface
Available operating voltages:
- 230 V AC 1ph 50/60 Hz
- 230 V + 48 V DC backup cooling
- 48 V DC

Close to you around the world

As a company with locations across the globe, we offer everything you need in the extremely dynamic world of information technology - plus professional advice in the right place at the right time.

With 21 subsidiaries, 11 production sites, and sales and service partners in over 140 countries, we make sure we are close to our customers wherever they are in the world.

Locations worldwide

Service and maintenance

Our trained and experienced sales and service partners are located in over 140 countries. The resulting proximity to our customers allows fast response times. In addition, regular training courses and an active exchange of information ensure high quality and an extensive knowledge of all our products. This way, you can be sure your products are in the best hands and get the right maintenance – all over the world.

Test Center

At our test center, you can have CabinetAir units tested under your individual operating and site conditions. This creates transparency and confirms the unit's performance and energy consumption.