FSL-U-ZAS
Ready-to-operate, decentralised ventilation units for supply and extract air, with heat exchangers; addition of secondary air; heat recovery all year round; for the ventilation of rooms and for providing comfortable room temperatures
Optional equipment and accessories
Application
Special characteristics
Variants
Heat exchanger
Arrangement of water connections
Left and right as viewed from the inside towards the outside. Right-hand version: Water connections and exhaust air opening on the right. Left-hand version: Water connections and exhaust air opening on the left.
Parts and characteristics
Useful additions
Construction features
Materials and surfaces
Mineral wool
Standards and guidelines
Maintenance
Functional description
Decentralised supply and extract air units with secondary air addition for room ventilation and for dissipating cooling loads and heat loads.
An EC centrifugal fan takes in the fresh air, which then flows through the motorised shut-off damper, the F7 fine dust filter and the secondary air damper.
Once the fresh air has passed the fan, it flows through the plate heat exchanger for heat recovery and through the heat exchanger for heating and/or cooling.
The supply air is discharged to the room as an inducing displacement flow.
The secondary air damper opens such that secondary air is added to the fresh air in order to increase the supply air flow rate and hence the thermal output.
The extract air first passes a G3 coarse dust filter, then flows through the plate heat exchanger, the extract air fan and a motorised shut-off damper before it is discharged to the outside as exhaust air.
For night purging a motorised shut-off damper opens an alternative extract air duct such that the extract air is led to the extract air fan, thereby bypassing the plate heat exchanger.
Width | 1100 mm |
Height | 150 mm below the raised floor, total height including ventilation grille at least 196 mm |
Depth | 860 mm |
Depth of ventilation grille | 340 mm |
Fresh air flow rate | 0 – 33 l/s or 0 – 120 m³/h |
Supply air flow rate | 150 m³/h |
Cooling capacity | 427 W |
Heating capacity | 1460 W |
Max. operating pressure, water side | 6 bar |
Max. operating temperature | 60 °C |
Sound power level | 43 dB(A) at 33 l/s or 120 m³/h |
Supply voltage | 230 V AC ±10 %, 50/60 Hz |
FSL-U-ZAS (sizing examples)
Fresh air flow rate | l/s | 25 | 25 | 33 |
Fresh air flow rate | m³/h | 90 | 90 | 120 |
Supply air flow rate | l/s | 25 | 42 | 42 |
Supply air flow rate | m³/h | 90 | 150 | 150 |
Total cooling capacity | W | 299 | 414 | 427 |
Room cooling capacity | W | 225 | 311 | 306 |
Air temperature following heat recovery | °C | 28.6 | 28.2 | 28.6 |
Relative air humidity following heat recovery | % | 49.0 | 51.0 | 49.1 |
Water content | g/kg | 11.9 | 11.9 | 12.0 |
Supply air temperature | °C | 18.5 | 19.8 | 19.9 |
Condensation | g/h | 0 | 0 | 0 |
Water flow rate | l/h | 70 | 80 | 80 |
Water temperature, inlet | °C | 16.0 | 16.0 | 16.0 |
Water temperature, outlet | °C | 19.7 | 20.4 | 20.6 |
Pressure drop – water side | kPa | 6.7 | 8.4 | 8.4 |
Total heating capacity | W | 844 | 1290 | 1460 |
Room heating capacity | W | 445 | 631 | 651 |
Air temperature following heat recovery | °C | 9.0 | 9.0 | 6.5 |
Supply air temperature | °C | 35.8 | 33.6 | 34.0 |
Water flow rate | l/h | 30 | 50 | 60 |
Water temperature, inlet | °C | 50.0 | 50.0 | 50.0 |
Water temperature, outlet | °C | 25.7 | 27.7 | 29.0 |
Pressure drop – water side | kPa | 1.3 | 3.3 | 4.6 |
Decentralised supply and extract air units with secondary air addition, for installation into raised floors. For the controlled ventilation of rooms and to maintain a comfortable room air temperature and room air quality.
Ready-to-operate unit which consists of a casing, air conditioning components, electric components and control components.
The units include energy-efficient EC fans for supply and extract air, a cross flow plate heat exchanger for heat recovery, an air-to-water heat exchanger for two-pipe or four-pipe systems, an F7 fine dust filter for supply air and a G3 coarse dust filter for extract air, shut-off dampers and a secondary air damper, each with an actuator.
Electric components and control components with factory integral wiring. Separate terminal box for the connection of external control components, including cable (approx. 1 m) for the connection to the ventilation unit.
Water connections with G½" union nut and flat seal.
Meets hygiene requirements of VDI 6022. Energy-efficiency class A according to Directive 2009/125/EC on energy-related products.
Special characteristics
Materials and surfaces
Mineral wool
Technical data
FSL-CONTROL II
Modular single room control system for decentralised ventilation units. The system controls valves, actuators and fans of ventilation units such that the comfort parameters for the room are achieved, energy efficiently and based on demand. The many functions, sensors and expansions allow for individual control strategies. This includes integration with the central BMS.
Control module (main PCB)
The control module controls valves, actuators and fans of the ventilation unit based on the parameters set on the room module.
Room module (master PCB)
The room module is the central control unit for a room. Room temperature, air quality and operating mode are signalled to the room module. The room module controls the control modules of at least one ventilation unit.
Temperature sensor
Temperature sensor for measuring the supply or extract air temperature.
Air quality sensor
Air quality sensor for the demand-based fan control.
Valve with actuator
Straight-way valve with thermoelectric actuator for controlling the water flow through the heat exchangers based on demand.
Valve
Actuator
Control panel
Control panel with fan stage selector.
Real time clock (RTC)
Real time clock module to expand the function range of the room module.
LonWorks LON-FTT10 interface module
LonWorks interface for integrating the room module with higher-level systems.
BACnet MS/TP or Modbus RTU interface module
BACnet MS/TP or Modbus RTU interface for integrating the room module with higher-level systems.
Lockshield
Lockshield for preventing water from flowing through the heat exchangers.
Sizing data
Fresh air
Supply air
Room cooling capacity
Room heating capacity
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Decentralised ventilation units are technically advanced products of high quality; they offer a wide range of configuration options. For specification details regarding your project please contact your nearest TROX branch or subsidiary.
Installation and commissioning
LN [mm]
Nominal length
LWA [dB(A)]
Sound power level
tPr [°C]
Primary air temperature
tWV [C°]
Water flow temperature – cooling/heating
tR [C°]
Room temperature
tR [C°]
Room temperature
tAN [C°]
Secondary air intake temperature
QPr [W]
Thermal output – primary air
Qtot [W]
Thermal output – total
QW [W]
Thermal output – water side, cooling/heating
VPr [l/s]
Primary air volume flow rate
VPr [m³/h]
Primary air volume flow rate
VW [l/h]
Water flow rate – cooling/heating
V [l/h]
Volume flow rate
∆tW [K]
Temperature difference – water
∆pW [kPa]
Pressure drop, water side
∆pt [Pa]
Total pressure drop, air side
∆tPr = tPr - tR [K]
Difference between primary air temperature and room temperature
∆tRWV = tWV - tR [K]
Difference between water flow temperature and room temperature
∆tWm-Ref [K]
Difference between mean water temperature and reference temperature
LN [mm]
Nominal length
Inducing displacement flow
The supply air is discharged near the external wall and with a medium velocity between 1.0 and 1.5 m/s. Due to the induction effect the supply air velocity is rapidly reduced such that, in cooling mode, the supply air displaces the room air over the entire floor area. The convection from people and other heat sources causes the fresh air from the pool to rise and create comfortable conditions in the occupied zone.
Heat exchanger
The maximum water-side operating pressure for all heat exchangers is 6 bar.
The maximum water flow temperature (heating circuit) for all heat exchangers is 75 °C; if flexible hoses are used, the water flow temperature should not exceed 55 °C. Units for other pressures and temperatures are available on request.
The water flow temperature (cooling circuit) should be at least 16 °C such that it does not permanently fall below the dew point. For units with a condensate drip tray the water flow temperature may be reduced to 15 °C.
Heat exchanger as 2-pipe system
Air-water systems with a 2-pipe heat exchanger may be used for either heating or cooling. In changeover mode it is possible to use all units within a water circuit exclusively for cooling in summer and exclusively for heating in winter.
Heat exchanger as 4-pipe system
Air-water systems with a 4-pipe heat exchanger may be used for both heating and cooling. Depending on the season, i.e. especially in spring and autumn, it may be possible that an office has to be heated in the morning and cooled in the afternoon.
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Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
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For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
We are here for you
Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Type
Heat exchanger
Arrangement of water connections
False floor pedestal
Control equipment
Real time clock
Interface
Air quality sensor
Supply air temperature sensor
Fresh air temperature sensor
Heating valve
kVS value – heating valve
Cooling valve
kVS value – cooling valve