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STULZ worldwide

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.

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Product Overview

At a glance Benefits Features Technical Data

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
  • 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)

  • 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
Cooling capacity total (kW) 4 - 16
Sizes 2
Air conduction Displacement
Refrigerants

R410A (GWP: 2,088)

R407C (GWP: 1,774)

R134a (GWP: 1,430)

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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.

 

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 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)
  • 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.

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Andorra United Arab Emirates Afghanistan Antigua and Barbuda Anguilla Albania Armenia Angola Antarctica Argentina American Samoa Austria Australia Aruba Azerbaijan Bosnia and Herzegovina Barbados Bangladesh Belgium Burkina Faso Bulgaria Bahrain Burundi Benin Bermuda Brunei Bolivia Brazil The Bahamas Bhutan Bouvet Island Botswana Belarus Belize Canada Cocos (Keeling) Islands Congo Central African Republic Congo-Brazzaville Switzerland Côte d’Ivoire Cook Islands Chile Cameroon China Colombia Costa Rica Cuba Cape Verde Christmas Island Cyprus Czech Republic Germany Djibouti Denmark Dominica Dominican Republic Algeria Ecuador Estonia Egypt Western Sahara Eritrea Spain Ethiopia Finland Fiji Falkland Islands Micronesia Faroes France Gabon United Kingdom Grenada Georgia French Guiana Ghana Gibraltar Greenland Gambia Guinea Guadeloupe Equatorial Guinea Greece South Georgia and the South Sandwich Islands Guatemala Guam Guinea-Bissau Guyana Hong Kong SAR of China Honduras Croatia Haiti Hungary Indonesia Ireland Israel India British Indian Ocean Territory Iraq Iran Iceland Italy Jamaica Jordan Japan Kenya Kyrgyzstan Cambodia Kiribati Comoros Saint Kitts and Nevis North Korea South Korea Kuwait Cayman Islands Kazakhstan Laos Lebanon Saint Lucia Liechtenstein Sri Lanka Liberia Lesotho Lithuania Luxembourg Latvia Libya Morocco Monaco Moldova Madagascar Marshall Islands North Macedonia Mali Myanmar Mongolia Macao SAR of China Northern Marianas Martinique Mauritania Montserrat Malta Mauritius Maldives Malawi Mexico Malaysia Mozambique Namibia New Caledonia Niger Norfolk Island Nigeria Nicaragua Netherlands Norway Nepal Nauru Niue New Zealand Oman Panama Peru French Polynesia Papua New Guinea Philippines Pakistan Poland Saint Pierre and Miquelon Pitcairn Islands Puerto Rico Portugal Palau Paraguay Qatar Reunion Romania Russia Rwanda Saudi Arabia Solomon Islands Seychelles Sudan Sweden Singapore Saint Helena, Ascension and Tristan da Cunha Slovenia Svalbard Slovakia Sierra Leone San Marino Senegal Somalia Suriname São Tomé e Príncipe El Salvador Syria Eswatini Turks and Caicos Islands Chad French Southern Territories Togo Thailand Tajikistan Tokelau Turkmenistan Tunisia Tonga Timor-Leste Turkey Trinidad and Tobago Tuvalu Taiwan Tanzania Ukraine Uganda United States Minor Outlying Islands United States Uruguay Uzbekistan Vatican City Saint Vincent and the Grenadines Venezuela British Virgin Islands US Virgin Islands Vietnam Vanuatu Wallis and Futuna Samoa Yemen Mayotte South Africa Zambia Zimbabwe Palestine Åland Heard Island and McDonald Islands Montenegro Serbia Jersey Guernsey Isle of Man Saint Martin Saint Barthélemy Bonaire, Sint Eustatius and Saba Curaçao Sint Maarten South Sudan Kosovo
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