HVAC-Systems

Gföllner Klimatechnik GmbH – making humans and their machines feel good

The Gföllner group climate technology team was founded in 2006 and has since focused on the development, procurement and planning of tailor-made solutions for cooling rooms with a high thermal load, as can predominantly be found in technical container construction, for example in e-homes or the construction of electrical systems.

Here, we are able to fulfil integral solutions for complex and customers-specific requirements in HVAC areas and offer this as a complete package. These solutions, obtained from one source, also have the crucial advantage of a care-free package for the system operator, which is coordinated centrally by us from the planning stage to implementation. All trades such as climate technology, electrics, home and sanitary technology are comprehensively matched together.

Our goal is to achieve a “plug & play” solution for the customer which saves time and costs when setting it up and which works in an efficient and reliable manner, even when coping with difficult environmental conditions.

The range of climate and ventilation appliances are presented in overview groups. The essential features of our products are often adapted for very difficult environmental conditions in the industrial environment.
So-called heavy-duty versions for outdoor temperatures of -40°C to +57°C, and appliance structures suiting marine requirements or for conditions in oil and natural gas refinery systems make this possible.

Our supply programme also includes products for comfort air-conditioning such as split climate solutions for single and multiple areas as well as various cold-water generation systems.

We look forward to hearing from you and would be delighted to answer your questions and support you in any HVAC matters.

Your contact person

HVAC Rooftop Units

The units are mounted and installed on the roof of the container with direct cooling of the indoor over supply and return air openings. A framework system between the container roof and the HVAC Unit guarantees an air- and weatherproof tight association.

Due to space saving compact unit solution on the roof, several container modules can be coupled on side- or front wall. The control panels inside can be located user-defined, without paying attention on free space for various ventilation openings on side walls. The heat output extracted from the room via the refrigeration cycle is discharged over the condenser heat exchanger freely upwards in vertical air direction
Between the evaporator and condenser air flow a partition is available to prevent mixing of the two air systems. This partition can also be designed as a Freecooling-System to perform cooling at low outdoor temperature without compressor operation but with ambient air. The main power supply as well as all control lines can be fed from the room directly to the air condition unit. The unit is pre-charged with refrigerant and programmed in terms of control technology.

No additional work is required on site; the HVAC unit must simply be lifted onto the container roof, connected to the electrical system and commissioned. (Plug&Play)

Main features
Unit device sizes in cooling performance from6,0 - 65,0 kW
RefrigerantR410a or R134a
Room conditions27°C / 47% r. H.
Ambient temperature Standard min./max.-25°C to +58°C
Min. ambient temperature in special execution-40°C
Main Power supply Standard400V-3ph-50Hz
Main Power supply in special execution460V-3ph-60Hz
Design according toCE, (on request UL)

HVAC Compact Units - Outdoor

The installation is carried out on the lateral side of the container wall with direct cooling of the indoor over supply and return air openings. Referring to supply air duct it’s possible to choose between two different unit executions. Either – by default - in the middle of the unit or for horizontal air flow on the bottom of the unit. As special execution it’s possible to blow vertically downwards into an intermediate floor system in order to ensure a uniform air circulation in the room.

The transition between container wall and HVAC Unit is air- and weatherproofed tight between the two elements. Due to the sidewall installation the units are accessible from the floor, which simplifies service- and maintenance work. The control panels inside should be located in the way to have sufficient space on the side walls to ensure air circulation over supply and return air openings in the container wall.

Depending on unit execution the heat output extracted from the room via the refrigeration cycle is discharged over the condenser heat exchanger freely upwards or horizontally downwards. Between the evaporator and condenser air flow a partition is available to prevent mixing of the two air systems. This partition can also be designed as a Freecooling-System to perform cooling at low outdoor temperature without compressor operation but with ambient air. The unit is pre-charged with refrigerant and programmed in terms of control technology.

No additional work is required on site; the HVAC unit must simply be lifted on the container wall, connected to the electrical system and commissioned. (Plug&Play)

Main features
Unit device sizes in cooling performance from
Refrigerant
3,5 - 35,0 kW
RefrigerantR410a or R134a
Room conditions27°C / 47% r. H.
Ambient temperature Standard min./max.-25°C to +55°C
Min. Ambient temperature in special execution-40°C
Main Power supply Standard400V-3ph-50Hz
Main Power supply in special execution460V-3ph-60Hz
Design according toCE

HVAC Compact Units - Indoor

The installation is carried out in the container with direct supply of the conditioned air into the room or the intermediate floor. In the latter version a permanent and specific air distribution is guaranteed. The return air is supplied from the front or above to the unit. A return air duct junction is realizable. The heat output extracted from the room via the refrigeration cycle is discharged to the outside over supply and return air openings on the rear side of the unit. Between the evaporator and condenser air flow a partition is available to prevent mixing of the two air systems. This partition can also be designed as a Freecooling-System to perform cooling at low outdoor temperature without compressor operation but with ambient air. With this execution it is necessary to have place for installation on the wall in the container. Wall openings to ensure free discharge of the warm air to the outdoor area are essential.

The transition between container wall and HVAC Unit is air- and weatherproofed tight between the two elements. Due to the indoor installation the units are easily accessible for service- and maintenance work. Furthermore the installation, commissioning and test run can already be carried out in the factory so no work is required to be done on site.

The control panels inside should be located in the way to have sufficient space on the side walls to install the units. The main power supply as well as all control cables can be fully wired in the factory, which ensures that no wiring errors can occur on site. The unit is pre-charged with refrigerant and programmed in terms of control technology. No additional work is required on site

Main features
Unit device sizes in cooling performance from3,0 - 28,0 kW
RefrigerantR410a or R134a
Room conditions27°C / 47% r. H.
Ambient temperature Standard min./max.-25°C to +55°C
Min. ambient temperature in special execution-40°C
Main Power supply Standard400V-3ph-50Hz
Main Power supply in special execution460V-3ph-60Hz
Design according toCE

HVAC Split Units

The installation of the HVAC system is carried out separately: evaporator indoor unit and compressor condensing outdoor unit. To close refrigerant circuit both units are connected together by refrigerant pipes made of copper tubes. The evaporator unit carries out the cooling of the room through the recirculation air. Thereby the extracted heat output is transported via refrigerant and copper tubes to the outdoor unit and discharged to the outside air. Depending on the container construction the units can be installed on the ceiling or side walls. The installation of the outdoor unit can be carried out on the roof or with a console on the outside walls.

With this split unit system an extremely dense execution of the container room can be achieved, since only refrigerant-, power- and control lines must be lead through the container walls. This air conditioning unit is a possible solution, especially when internal overpressure is generated or in case of high fire protection requirements. The service- and maintenance work needs to be carried out on the indoor and on the outdoor unit. The control panels inside can be located user-defined as the indoor units can be installed on the ceiling.

Refrigeration works such as installation of refrigerant pipelines, filling the system with refrigerant and commissioning has to be done on site. If required it’s possible to completely pre-assemble the units in our factory and connect the indoor and outdoor units together with special valve connection kits. For transport of the container the outdoor units will be dismantled and can be easily assembled and commissioned on site. Due this kind of installation preparation there’s no skilled refrigerant technician needed on site.

Main features
Unit device sizes in cooling performance from2,5 - 40,0 kW
RefrigerantR410a or R134a
Room conditions27°C / 47% r. H.
Ambient temperature Standard min./max.-25°C to +57°C
Min. ambient temperature in special execution-40°C
Main Power supply Standard400V-3ph-50Hz
Main Power supply in special execution460V-3ph-60Hz
Design according toCE, (on request UL)

Close Control HVAC Units

Close control Units are mainly used for precision cooling in thermally high stressed technical rooms as IT-Datacenters, server rooms as well as laboratory- and measuring areas. The execution of these systems is possible as a direct evaporator with external condenser heat exchanger, as water-cooled system for connecting to an existing cooling water system or with external cooler. Similarly available are cold water units which are supplied by existing chilled water system. With the common split version the installation is carried out separately for the indoor and outdoor unit. To close the refrigerant circle both units are connected with refrigerant pipes made of copper tubes. The evaporator unit carries out the cooling of the room through the recirculation air. Thereby the extracted heat output is transported via refrigerant and copper pipes to the outdoor unit and discharged to the outside air.

The field of application of the close control unit is for example in container or in permanent buildings. Therefore the appropriate space for the unit needs to be considered in the room to be air conditioned and the arrangement of the control panels or racks has to be provided.
The conditioned air can be supplied into a raised floor system and even distributed through air outlets to the room. In case of supply air outlet at the top of the unit it can be connected an air duct system or a plenum for horizontal air flow direction into the room.

The installation of the outdoor unit needs to be carried out with a roof- or wall console. The service- and maintenance work must be carried out on the indoor and on the outdoor unit.
Refrigeration works such as installation of refrigerant pipelines, filling the system with refrigerant and commissioning have to be done on site.

Main features - Direct expansion system
Device sizes in cooling performances from4,0 - 135,0 kW
RefrigerantR410a or R134a
Room conditions27°C / 47% r. H.
Ambient temperature Standard min./max.-25°C to +57°C
Min. ambient temperature in special execution-40°C
Main Power supply Standard400V-3ph-50Hz
Main Power supply in special execution460V-3ph-60Hz
Design according toCE
Main features - Cold water system
Unit device sizes in cooling performance from4,0 - 550,0 kW
RefrigerantR134a
Room conditions27°C / 47% r. H.
Cold water temperature7/12°C
Glycol0%
Main power supply Standard400V-3ph-50Hz
Main Power supply in special execution460V-3ph-60Hz
Design according toCE

Waterchiller- units

The installation site of such units can be made outdoor (aircooled version) or inside a building (watercooled version). For cooling the circulating medium like water or a mixture of water/glycol it is required to have a closed mechanical refrigerant circuit with the main components of compressor, evaporator and condenser to extract the transferred heat capacity from the medium. This capacity will be carried by the refrigerant to the condenser heat exchanger coil and consequential to the outdoor ambient air. In case of installation the water-chiller inside a room or building the medium heat can be transferred to an external independent drycooler unit. Water-chiller units will be normally used in case of the requirement of very high cooling capacities combined with less space availability.

Also this system requires less amount of refrigerant to be used in case of a multiple split system with a high quantity of evaporating units. Water-chiller ensure in comparison to direct expansion system a better cost savings in use of refrigerant, higher energy efficiency and better sound absorption in case of a water cooled system. The application covers purposes in sections of industrial fields, productions, IT- datacenters but also for comfort cooling like in office- and residential buildings or hotels.

Because of flexibility together with our manufacturers we are able to ensure tailor-made solutions with best efficient operation with high COP- and EER- values. The product availability covers not only fix installed applications, but also mobile chiller-systems which are able for transportation or any other special solution.

Main features - Air cooled / Water cooled - Water chillers
Unit sizes for cooling capacities10,0 - 1420,0 kW
RefrigerantR410a or R134a
Type of compressorScroll or mod. Screw
Ambient temperatures standard min./max-25°C until +55°C
Min. ambient temperatures for special units-40°C
Main power supply standard460V-3ph-50Hz
Main power supply special460V-3ph-60Hz
Design according toCE