Decentralised Ventilation Unit Type FVS-S/O Univent

Specification

Decentralised Ventilation Unit Type FVS-S/O Univent

Version for visible installation with integrated linear diffuser, without additional heat exchanger

Qty. / Description / Unit price
in € / Total price
in € /
General Description
Ready-to-install decentralised facade ventilation unit for installation below the ceiling with high-efficiency sound absorber for supply and exhaust air and with direct connection to the facade including outside/exit air openings and weather protection grille with aerodynamic separation of supply and exhaust air conduction, for visible assembly without additional ceiling panelling. For
decentralised ventilation (supply and return) directly via the facade, with heat recovery and controllable secondary air mode, without reheating the supply air in the unit. Minimum supply air temperature of 17°C all year round.
Complete airflow system with integrated exhaust air opening and integrated air diffusers. Air is supplied via a highly inductive metal diffuser to achieve a high-comfort airflow with excellent reduction of temperature differences and low room air speeds.
Low risk of the heat recoverer to freeze due to supply air temperature control via added secondary air. No deicing required by electrically preheating the outside air.
Three-wall insulated casing of galvanised sheet steel for visible assembly, with a 40 mm insulation of mineral wool, covered on all sides. Casing components coated similar to RAL. Casing cover on the bottom removable for maintenance.
Including system unit for operating FVS school ventilation units without an additional condensate line.
Specifications and classification acc. to VDMA Standard Sheet 24390
Technical data apply to free suction and diffusion.
A-weighted sound power sum level:
Sound power level inside the room LpA with 600 m³/h: 35 dB(A)*
* With average room absorption D1 = 12 dB and (logarithmic addition of sound emission from housing and air-generated noise already taken into account)
Wind impact
No flow rate control. In case of wind pressures varying by ± 20Pa, flow rates are adapted by ± 40m³/h, based on 680m³/h (nominal air flow rate) by ± 7%.
Fans
Low-noise centrifugal fans with energy-saving, high-efficiency continuous-activation EC motors for outside air flow rates of 0…730m3/h.
Electrical performance data for supply air and exhaust air fan:
for nominal flow rate of 680m3/h 130W
for maximum flow rate (10V) of 730m³/h 320W
power consumption with nominal flow rate 0.88A
power consumption max. 2.4A
required back-up fuse 10A
fan connection 230V
speed activation (direct voltage) 0…10V
With nominal flow rate the supply and exhaust air fan meet SFP Class 1
requirements (< 500W/(m³/s)) with 390W/(m³/s).
Air filter for outside and exhaust air
Fine filter class F7 for outside air to separate fine dusts and allergens contained in the outside air.
Exhaust air filter M5 to separate coarse dusts in the secondary air mode and to keep the heat recovery unit clean.
Filter marked with direction of air and filter type, field to enter the date of filter replacement (acc. to VDI 6022). Filters entirely made of synthetic composite without metallic contents, completely ashable.
Heat recovery unit
Counterflow plate heat exchanger made of corrosion resistant aluminium alloy with complete separation of air paths. Transmission of sensitive and latent heat without humidity or odour transfer.
Heat recovery rate (dry and wet) 83%
Outside air/exit air dampers with weather protection grille
Combined outside air / exit air damper with electrical actuator to control the secondary air flow for on/off, de-icing resp. avoidance of icing, and supply air temperature limitation.
Outside air damper with thermal insulation, air-tight sealing acc. to DINEN1751 meeting tightness class 3 requirements. Automatic closing in case of power failure thanks to actuator with spring return. 40 mm mineral wool heat insulated, twin-shell casing.
Weather protection grille with virtually short-circuit free separation of outside air and exit air. Separation of rain. Rain water drainage sloping towards the weather protection grille.
Air diffusers
Integrated highly inductive type LDB-12/M metal linear diffusers for variable volumetric flows, generating a room flow with a high degree of thermal comfort while complying with the requirements stated in Cat. B, DIN EN ISO 7730 (as specified in VDI 6040). The diffuser contour quickly reduces the outlet velocity and temperature differences.
Control
Complete, ready-to-use control, ready-to-mount wiring, integrated in the unit without operating panel, with plug-in connection. With connection for central or decentralised activation as stand-alone solution.
4 operating modes (Eco, Comfort, nocturnal ventilation, forced ventilation) switchable via potential-free contacts. Indication of malfunction also via non-floating contact.
Alternatively, the operating modes can be controlled via separate timer programs on each unit or via a bus system (KNX-S mode, BACnet, LON, Modbus-RTU).
Supply air temperature control to protect the heat recoverer from freezing and make use of free cooling.
Monitoring of exhaust air to prevent icing of the heat recovery system. Use of a reheater not necessary for generating a comfortable room flow.
Controlled nocturnal ventilation with automatic switch-on after clearance, automatic switch-off if supply air temperature difference is too small or desired room air temperature has been achieved. Controller with Ethernet interface. Easy amendment of parameters (such as CO2, temperatures, etc.) via service tool (optional).
Antifreeze
Not applicable if heat exchangers are not installed.
Room cooling protection turns off unit if exhaust air temperature drops below limit temperature.
Sanitation
The heat recoverer’s condensate tray is made of stainless steel sloping
towards the drainage. The unit’s inside is entirely lined with galvanised sheet steel. All air-conveying components are partly detachable for access and cleaning. Filter, actuators, outside air damper, and condensate tray are accessible for maintenance and repair via the unit’s underneath from the room side.
Media connections
Condensate connection (provided on the unit’s right and left side) for corrosion protected line, e.g. DN 15 with sufficient slope
Power supply 230V, 5A.
Inputs for release.
Dimensions, installation
Suitable for plug-in installation in school rooms. Easy connection to the outer wall/facade e.g. by window fitter. Possibility of meeting heat and sound insulation requirements. Modular design of the unit, i.e. flexibility thanks to transition lines on the facade, sound absorber and air conduction.
The unit is factory-wired and tested and will be supplied including complete control unit.
Unit height 476 mm
Unit width 1139 mm
Unit length (incl. sound absorber, w/o adapter) 3143 mm
Dimensions weather protection grille (standard) 450 x 844 mm
(aluminium coloured anodised or powder coated acc. to RAL)
Weight of ventilation unit 300 kg
(incl. sound absorber and air diffusers)
Manufacturer: LTG Aktiengesellschaft
Series: Decentralised Ventilation Units
for installation below/in ceilings
Type: FVS-S/O
Accessories, special versions (on request, additional charge)
o CO2 sensor (with continuous 0…1V output for wall installation in the
exhaust air duct area, for self-supported, usage-dependent ventilation with switching hysteresis).
o Service Tool HMI to read out and acknowledge malfunction messages, change parameters. Illuminated digital display (1 piece per order).
o Remote switching unit FSG, without communication. With 4 buttons for operating mode selection, display of actual operating mode via green LED.
In addition, one red LED for malfunction. (1 piece per unit).
o Duct adapter insulated including sound splitter abt. 500mm between ventilation module and weather protection grille.
o Condensate pump
o Waterproof grille (standard) for attachment to LTG decentralised ventilation units, Type FVS-..., made of extruded aluminium sections, with aerodynamically separate supply and exhaust air, with rain channel, 844x450mm, natural-anodized.
o Waterproof grille (special version) for attachment to LTG decentralised ventilation units, Type FVS-..., made of extruded aluminium sections, with aerodynamically separate supply and exhaust air, with rain channel,
Dimensions: ______x ______mm
Special anodising: ______or coating (RAL):______
o Start-up (without communication) and briefing (verification of correct wiring, installation and air conveyance.
Instructions as to how the control works, the operating modes, malfunction messages and how to set/change unit-specific parameters. Attention: A prerequisite for this service is the completed verification that electrical installations provided by an authorised and qualified electrician have been properly executed. This service can only be provided in the presence of a qualified staff member of the company having performed said electrical installations. However, establishing and signing the commissioning certificate are the responsibility of the company in charge of any technical work in connection with the ventilating system).
LTG AG does not connect the unit to the network or put it into operation. Standardised parameter lists are provided.
o LON interface for overriding control.
o BACNet interface for overriding control.
o
o Start-up (with communication)
Start-up with communication includes start-up w/o communication plus the following services:
Preparation of parameter lists acc. to specification and clarification of technical details.
Entry and provision of EDE lists.
Support for connection to the network and start-up.

Tel. +49 711 8201-0 · Fax +49 711 8201-720 · www.LTG.net ·

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