WallAir

Outdoor air conditioner for Free Cooling in containers

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Precision air conditioning units for outdoor installation

WallAir units are compact and weatherproof precision air conditioning units that are mounted outside the container for cooling and so enable the container space to be used to the full.

Container

Optimized for air conditioning containers and modular buildings

Free Cooling

Maximum potential savings by using cool outside air

Base station

Reliable air conditioning of telecommunication systems

Plug & Play

Units immediately ready for connection and operation

Product Overview

At a glance

Most important benefits

Up to 84 % savings on running costs thanks to Direct Free Cooling
Low refrigerant quantity (less than 10 tons CO₂ equivalent)
Connectivity: Monitoring and remote access to outdoor air conditioner available via a web interface

Most important features

Available with EC compressor
Outside air conditions: -20 °C winter/+50 °C summer

Most important technical data

Cooling capacity total (kW): 4 – 16
Air conduction: Displacement

Benefits

Up to 84 % savings on outdoor air conditioner’s running costs thanks to Direct Free Cooling
Low refrigerant quantity (less than 10 tons CO₂ equivalent)
No annual leak test required in accordance with F-gas regulation*
The units are plug and play and therefore immediately ready for connection and use
Connectivity: Monitoring and remote access available via a web interface
Backup operation (Free Cooling and backup cooling) on failure of the main power supply
Automatic restart for the ac outdoor unit after power failure
Very long maintenance intervals
Robust and designed for continuous 24/7 operation, 365 days a year

*Due to low refrigerant quantity and hermetically sealed refrigerant circuit (standard for EC compressor, optional for On/Off compressor)

Features

Available in 2 sizes
Factory tested, filled with refrigerant and ready for operation from the very first day
Available with EC compressor
Outside air conditions: -20 °C winter/+50 °C summer
Filter monitor and airflow alarm
Inside and outside temperature sensors
Zigzag filter class ISO 16890: ePM10 50 %
Condensation pressure control
Condenser with microchannel technology

Technical Data

Cooling capacity total (kW)	4 - 16
Sizes	2
Air conduction	Displacement
Refrigerants	R410A (GWP: 2,088) R407C (GWP: 1,774) R134a (GWP: 1,430)

All details about WallAir

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: WallAir is a model of adaptability and the shelter units can be precisely adapted to your individual requirements. In addition, a variety of options and equipment versions are available to achieve the optimum result.

Learn more about Climate. Customized.

Optimum operational reliability 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.

Data recording
Remote configuration
Firmware updates
Alarm relaying

Backup operation for maximum reliability

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.

Direct Free Cooling

In many base stations and small data centers, comfort air conditioning units without Free Cooling mode are still used today for air conditioning, with high energy consumption as the result. Units from STULZ’s Shelter Cooling series exploit the potential of Free Cooling, dramatically lowering your energy costs.

Savings with Direct Free Cooling
Efficient air conduction and intelligent control of operating modes enable savings of up to 84 % to be achieved.

Operating modes

Direct Free Cooling mode

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.

Mixed mode

If Free Cooling is not sufficiently available due to the outside temperature, the unit can still use the outside air to some extent. The result is a combination of compressor cooling and Free Cooling.

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.

Reliable operation in any weather conditions

Whether your business-critical system is working in temperatures of up to 55 °C, in ambient air contaminated by particles, in temperatures as low as -40 °C, or in a permanently humid environment – you can always rely on systems from STULZ.

Plug & Play

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

Displacement airflow

Displacement units enable cold supply air to flow close to the floor at low speed. The resulting “pool” of cold air on the floor prevents hot and cold air from mixing. This principle increases the number of operating hours with Free Cooling, achieving maximum potential savings.

EC compressor

Advantages of the speed-controlled EC compressor

Maximum energy efficiency for hvac outside units in partial load mode
Constant supply air temperature
Refrigerant R410a
Integrated compressor soft start
Long service life thanks to continuous operation without compressor on/off cycles

Control and monitoring

The SEC.blue/C2020 consists of a controller and optional operator terminal. The controller manages all functions of the WallAir unit. The operator terminal, consisting of a keypad and LCD, displays the outdoor air conditioner’s most important operating states and alerts.

Sequencing

The SEC.blue enables up to ten units to be configured in a single air conditioning system. If an individual unit drops out or the heat load rises, the standby unit is switched in for additional support.

Night Mode

Time-controlled limitation of the condenser and evaporator fan speed for quiet operation
Energy-saving mode

Monitoring and alarm relaying

Via BMS systems (Modbus onboard, further protocols via WIB 1000)
Nine potential free contacts are available: Alarms can be assigned a high or low priority
Via GSM modem (CompTrol SMS)

Simple configuration and software updates

Central configuration of units from a laptop
Hardware key for uploading and downloading software without a laptop and/or copying the configuration onto other units

Options

The numerous different options and possible equipment enable you to perfectly adapt WallAir hvac outdoor units to your requirements.

High-temperature operation up to 55 °C with R134a
Winter kit up to -40 °
Compressor soft start for low start-up currents
Electrical wiring, with connector for plug and play
Backup operation with 48 V DC or 230 V/50 Hz/1 Ph
External operator terminal
Electric heater
Humidity sensor

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 WallAir units tested under your individual operating and site conditions. This creates transparency and confirms the unit's performance and energy consumption.