Ceiling mounted ventilation units for heating and cooling
Ultra powerful, WHISPER-QUIET, attractive and flexible
The FB-A from WOLF has long epitomised premium quality in the ceiling mounted air heaters and ventilation units sector.
WOLF units not only provide exceptional manufacturing quality and performance, but also feature an elegant and timeless product design.
Benefits
- Highly efficient fans with EC technology
- Particularly quiet thanks to axial or radial fans
- Suitable for high external resistances
- Discharge at the side
- Pre-determined flow rate thanks to housing geometry
- Intake at the top, can be above/below ceiling
- Heating/cooling medium connection at the top
- Individually adjustable air guide fins
- Quiet and powerful condensate pump
- Condensate pan with fall to pump
- Delivered fully wired and with hose piping connected
- Recirculating air, mixed air and outdoor air operation
- EC control unit or WOLF C-MAX control
- Stepless output control
Flexible peak performance
Building on this standard, we revised our FB-A and developed the FB-A flex model.
Scale your unit performance flexibly to suit your requirements while maintaining harmonised and elegant optics, drawing on a huge range of versions and outputs.
The FB-A flex offers you flexibility!
The use of current EC technology in conjunction with reliable sickle-bladed axial fans or pioneering high performance radial fans with an extremely stable curve across the entire performance range forms the basis for a performance optimised, highly efficient method of operation without compromise.
The exclusive 12-cornered unit housing made of stable sheet steel with high grade powder coating is visually attractive and blends harmoniously into all room concepts. The housing is inclined 5° towards the living space for energy optimised pre-handling of this air current.
Air is distributed via six discharge fins, which are arranged all around the circumference and can be removed without any tools. These are each equipped with four aerodynamically shaped, individually adjustable and flow optimised air guide fins. This ensures user defined air current distribution and control.
The FB-A flex can be designed and used for heating operation or for combined heating/cooling operation.
Units with a cooling function are equipped with a condensate pan sloping on one side towards the pump reservoir.
All discharge fin combinations can be fully removed quickly and easily without tools for maintenance purposes, and allow free access to the heat exchanger, pump reservoir and float switch.
The WOLF FB-A flex is designed to be used as a ceiling unit for heating and/or cooling operation, for recirculating air, mixed air or outdoor air operation to ensure maximum thermal comfort in challenging applications.
Einsatzbereiche
- Retail premises
- Showrooms and exhibition spaces
- Reception areas
- Exclusive facilities with a room height of 5 m or less
Pioneering + NEW
Design with highly efficient EC radial fan
- Extremely quiet
- Very high air flow rate
- Stable curve
- For high external resistances at a constant flow rate and stable performance
- Energy efficiency class IE5
- Performance data, accuracy class 1 according to DIN 24166
with EC high performance radial fan
Unit type | A (mm) | B (mm) | C (mm) | Weight (kg) | Recirculating air operation D (mm) | E (mm) |
|---|---|---|---|---|---|---|
82 EC/R | 1148 | 1049 | 258 | 74 | 200 | 91 |
83 EC/R | 1148 | 1049 | 258 | 76 | 200 | 91 |
84 EC/R | 1148 | 1049 | 258 | 78 | 200 | 91 |
* Heat =
* Cool =
with EC sickle-bladed axial fan
Type | A (mm) | B (mm) | C (mm) | Weight (kg) | D (mm) |
|---|---|---|---|---|---|
62 EC | 878 | 799 | 240 | 32 | 100 |
63 EC | 878 | 799 | 240 | 34,5 | 100 |
72 EC | 1148 | 1049 | 258 | 48,5 | 100 |
73 EC | 1148 | 1049 | 258 | 49,5 | 100 |
74 EC | 1148 | 1049 | 258 | 51 | 100 |
82 EC | 1148 | 1049 | 258 | 55 | 100 |
83 EC | 1148 | 1049 | 258 | 57 | 100 |
84 EC | 1148 | 1049 | 258 | 59 | 100 |
* Heat =
* Cool =
Pioneering technology
Air conduction
Recirculating air operation
During recirculating air operation, the air from the space to be heated/cooled is drawn in and, after heating/cooling, is blown back into the same space.
This process incurs the lowest running costs.
Pure recirculating air operation
Intake at the side, discharge at the side
Mixed air operation/outdoor air
During mixed air operation, outdoor air (variably adjustable outdoor air ratio) is drawn in together with the ambient room air.
This process reduces heating and cooling costs, as it uses some pre-conditioned air from the room, while covering the required outdoor air demand.
Recirculating air, mixed air & outdoor air operation
Intake at the top via air duct in the intermediate ceiling, discharge at the side
Outdoor air operation
During outdoor air operation, air for heating or cooling is drawn in directly from outside via an outdoor air duct with filter.
This process guarantees clean, fresh air subject to corresponding external conditions.
Outdoor air operation
Intake at the top via air duct, discharge at the side
Air conduction via WOLF accessory system
Ceiling mounted ventilation unit with mixed air mounting parts
Outdoor air intake via the roof
The recirculating air/outdoor air ratio is adequately controlled by the mixed air part. Outdoor air intake vertically via the roof. Recirculating air is drawn in via adjustable recirculating air intake grilles.
Ceiling mounted ventilation unit with mixed air mounting parts
Outdoor air intake via the wall
The recirculating air/outdoor air ratio is adequately controlled by the mixed air part. Outdoor air intake horizontally through an exterior wall. Recirculating air intake via recirculating air intake grilles.
Ceiling mounted ventilation unit with recirculating air
Air intake via intake grilles in the intermediate ceiling
Air intake via recirculating air intake grilles, suitable for grid ceilings 625 x 625.
Outdoor air and recirculating air operation through an efficient and energy optimised holistic system
- Fulfils all requirements of the ErP Directive 1253/2014
- High hygiene standard thanks to pre-filtering of outdoor air with project-specific filter class
- Individual configuration and control of the overall system through a state of the art WOLF C-MAX DDC control unit with various communication options and remote servicing
- Individual and demand optimised temperature control of and outdoor air supply to individual areas and room sections
- High energy recovery efficiency through a heat recovery system optimised for the energy requirements of the specific project
› optional as a counter-current plate heat exchanger with high recovery efficiency and fully separated outdoor air and extract air flows
› optional as a thermal wheel heat exchanger with high efficiency for energy and moisture recovery from the extract air and transfer to the supply air
EC control units
EC control 690 EC
The WOLF EC MultiController E is a multifunctional controller with integral display and easy to use interface. The EC controller is equipped with multiple inputs and outputs and a serial RS485 interface with Modbus protocol. This ensures easy integration into ventilation systems.
The EC controller comprises an integral controller with 0 – 10 V DC output for regulating air temperature. Control via external sensors in the room. The display language is selected when the EC controller is started. German, English, Danish and Swedish are available to choose from.
The inbuilt weekly scheduler with digital timer enables the output signal to be customised automatically with up to ten changeovers per day every seven days. It is possible to toggle between three operating modes (day/night/off). In the event of a power failure, a backup battery ensures that the data is retained for up to 72 hours.
The EC controller also includes a micro SD card reader, which can be used for software updates or to "clone" settings from one EC controller to another. By entering a password, the settings can be protected against unauthorized access.
Alarms may also be triggered via Modbus. This ensures that the unit can be maintained according to schedule for optimum operation with minimum energy consumption. The EC controller also has a visual alarm function, which is required in many ventilation solutions.
Thanks to its compact dimensions of 120 x 122 x 60 mm, a protection rating of IP 54 and an ambient temperature of 0 – 50 °C during operation, the EC controller can be used for numerous applications.
The 230 V AC supply voltage enables it to be incorporated easily into the sub-supply. The relay output has a switching capacity of 5 A AC (230 V), while the output current of the 0 – 10 V output is max. 10 mA.
EC control 691 EC
Central control for actuating the fan via a stepless speed regulator. The control has an ON/OFF switch and an integral speed regulator 0 – 10 V DC with a controllable output range of 0 – 100 %. This enables the fan to be adequately and steplessly controlled over the entire speed range. When connecting multiple fans to an EC control, all fans are controlled in parallel.
The connection option for a room thermostat and an additional switching contact provide the option to adequately control the fan according to the preferred temperature.
- Digital inputs: 2 inputs for floating switching contacts (thermostat, external on/off contact, door contact, etc.)
- Speed signal: 0 – 10 V DC, max. 5 mA
Maximum cable cross-section:
Voltage supply: 2.5 mm²
Switching contact and adjusting signal: 2.5 mm² - Housing: plastic
- Installation: on finished walls
- Colour: white similar to RAL 9010
- Protection rating of housing: IP 54
- Dimensions W x H x D: 110 x 180 x 111 mm
EC control 692 EC
Central control for actuating the fan via a stepless speed regulator. The control has an ON/OFF switch and an integral speed regulator 0 – 10 V DC with a controllable output range of 0 – 100 %. This
enables the fan to be adequately and steplessly controlled over the entire speed range.
When connecting multiple fans to an EC control, all fans are controlled in parallel. The connection option for a room thermostat and an additional switching contact provide the option to adequately control the fan according to the preferred temperature.
The 692-EC version also features either control of 230 V open/close dampers or, via a separate position indicator, control of continuous 230 V dampers to adequately control the mixed air ratio. The dampers are supplied with voltage directly from the 692-EC via a 230 V AC supply voltage. This enables the EC control to be incorporated easily into the sub-supply. Using a collective message by means of a red LED, faults can be localised and rectified quickly and easily.
- Input for damper setpoint generator 0 – 10 V
- Speed signal: DC 0 – 10 V, max. 5 mA
- Switching contact for open/close flaps
- Voltage supply 230 V for damper actuators
- Maximum cable cross-section:
› Voltage supply: 2.5 mm²
› Switching contact and adjusting signal: 2.5 mm² - Housing: plastic
- Installation: on finished walls
- Colour: white similar to RAL 9010
- Protection rating of housing: IP 54
- Dimensions W x H x D: 110 x 180 x 111 mm
Engineering information
To consistently ensure optimum and energy efficient operation, it is important not only to calculate the flow rate and the heating outputs and cooling capacities, but also to take into consideration the spatial and structural conditions that may significantly influence acoustics, flows and air distribution, for example.
Penetration depths in heating mode
When sizing the units, ensure that the discharge temperature in heating mode is max. 20 K above the preferred room temperature. It should be possible to adjust the flow temperatures (return addition) at the central heating plant. The steepness of the control curve can then be used to achieve optimum discharge temperatures over the entire heating period.
Low discharge temperatures result in lower temperature differentials between the primary air stream and the room temperature, which prevents drifting (thermal lift) of the primary air stream.
This, in turn, means low energy consumption costs. During positioning, ensure that the air flow can be discharged without any obstructions. If structural elements (shelving, tall manufacturing machinery, etc.) are in the way, the penetration depth of the primary air stream and therefore temperature distribution in the room is reduced.
The arrangement of ceiling mounted ventilation units facing opposite one another and spaced close together will also have a negative effect if both air streams meet.
Penetration depth of the horizontal, non-isothermal air stream without mounting accessories on the suction side in relation to a temperature differential between the room air and supply air of Δt 20 K. The penetration depth is the furthest distance that can be achieved by an air stream in a room. Obstacles (transverse flows, obstructions to flow) are not taken into consideration. The fins for guiding the primary air stream are oriented parallel to the air flow (horizontal = 0°). Adjusting the fins reduces the penetration depth (see table 2).
The technical data relates to a jet end velocity of 0.3 m/s, a temperature differential of (Δt 20 K) between the air discharge temperature tLA and room temperature tR (20 °C). For correction value for other temperature differentials, see table 3.
Penetration depth
Type | V10 | V8 | V6 | V4 |
|---|---|---|---|---|
FB-A flex 62 | 5,9 m | 5,1 m | 4,6 m | 3,9 m |
FB-A flex 72 | 6,3 m | 5,6 m | 5,0 m | 3,9 m |
FB-A flex 82 | 7,6 m | 6,5 m | 5,3 m | 4,1 m |
FB-A flex 82 R | 9,9 m | 8,7 m | 5,8 m | 4,2 m |
Korrekturfaktor bei Lamellenstellung
| < 0 ° | 0 ° K = 0 | See table 3 |
| < 30° | 30° K = 0,7 | See table 3 |
| < 40 ° | 40° K = 0,5 | See table 3 |
| < 45 ° | 45° K = 0,4 | See table 3 |
Korrekturwert K für Eindringtiefe bei einer Temperaturdifferenz zwischen Raumluft und Zuluft
| Δt | 20 | 30 | 40 | 50 |
| K | 1,0 | 0,97 | 0,94 | 0,91 |
Typ: FB-A …-EC-E (D)
WOLF design air heater for ceiling mounting in a stylish sheet steel housing with powder coating RAL 9010 (other RAL colours optional) for challenging heating applications.
Exclusive 12-cornered inherently stable housing made of sheet steel with powder coating in RAL 9010 (other RAL colours optional) with a downward 5° housing angle for optimum air routing into the living space.
Air is distributed via six discharge fins, which are arranged all around the circumference and can be removed without any tools. They are each equipped with four aerodynamically shaped and individually adjustable flow optimised air guide fins, ensuring user defined air current distribution and control.
Even and consistent output transfer is ensured by the resistance optimised CuAl round pipe heat exchanger for DHW operation. Area of application max. 90 °C medium temperature at 16 bar operating pressure.
Designs with two to four pipe rows ensure optimum output transfer and a high supply temperature even at extremely low flow temperatures. The pipes are made of corrosion-resistant copper. The formed continuous aluminium fins ensure loss-free heat transfer and low air resistance.
Distributors and manifolds are designed to be permanently corrosion-resistant.
The flow and return for the medium connection with threaded connector are routed upwards for ease of installation and accessibility.
Straightforward unit installation via four attached stable mounting brackets. Optional easy-fit intake collar and mounting option for an optional filter.
Highly efficient fan/motor unit as an electronically commuted EC sickle-bladed fan unit 230/400 V / 50/60 Hz with integral control electronics and stepless output control via 0 – 10 V control input.
The highly efficient fan/motor unit with statically and dynamically balanced impeller is fitted to the back of the housing with fine-mesh contact protection. All electrical cables are wired to a mounted terminal box or optionally to a repair switch with integral terminal strip.
Extremely quiet operation thanks to sickle-bladed axial fan made of high grade special polycarbonate. Insulation class B, protection rating IP 54, electrical design acc. to EN 60335-1.
Motor protection thanks to integral, interactive temperature management.
All ErP requirements and specifications are fulfilled.