FSL-U-ZAS
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
1 extract air/secondary air filter as flat filter medium (coarse dust filter), filter class according to ISO 16890: ISO Coarse 60 %
2 filter covers for outdoor air filters (Mini pleat filters), class ISO ePM 1 65 % (fine dust filters)
3 Service socket
4 Spigot (optional) / seal on the wall side
5 Outdoor air temperature sensor
6 2- or 4-pipe heat exchanger
7 Supply air temperature sensor
8 Bypass air filter as flat filter medium (coarse dust filter), filter class according to ISO 16890: ISO Coarse 60 %
9 Inspection access panel
10 Water connections
11 Mounting bracket (sliding)
12 Levelling feet
13 Supply voltage connecting cable
14 Controller box for internal electrical wiring (230 V - opening only by qualified technician)
15 Terminal box for connection installation by the customer (protective extra-low voltage)
16 Steel wire, connection of terminal box and controller box to the ventilation unit
SEH Single room exhaust air
SET 1 Single room extract air
SET 2 Single room extract air (summer bypass, night purge)
SRO Single room outdoor air
SRS Single room supply air
SEC Secondary air
Underfloor unit for decentralised ventilation for installation in the system floor (cavity or raised floor). The casing is made of painted sheet steel and provides noise and thermal insulation. The supply air opening in the floor can be covered with either a linear grille or a roll down grille. The outdoor air is drawn in by an EC centrifugal fan and flows through the motorised shut-off damper and the fine dust filter. The outdoor air then flows through the recuperative cross-flow heat recovery unit. There, part of the extract air heat is transferred to the outdoor air flow. The filtered and heated outdoor air is then directed into the rooms as supply air. If necessary, the air is heated or cooled by the heat exchanger before it is supplied into the room as a displacement flow. The extract air first passes through the extract air filter, then flows through the heat recovery unit, the extract air fan and the motorised shut-off damper before it is discharged to the outside as exhaust air. If the room air quality is sufficient, FSL-CONTROL III closes the outdoor air dampers and changes to secondary air operation mode, which is more energy efficient. The control system compares the room air quality setpoint value to the actual value measured by the CO2 sensor, and switches automatically between outdoor air and secondary air operation. In case of a power failure, the outdoor air and exhaust air dampers are closed to ensure fire protection, frost protection and to avoid draughts. This is ensured by a capacitor in each actuator. The supply air flows into the room close to the façade, at medium velocity. Due to the induction effect, the supply air velocity is rapidly reduced after entering the room. As a result, in cooling mode, the supply air spreads out like a displacement flow over the entire floor area. Near heat sources such as people or equipment, a lift current is formed by natural convection, so that the air is exchanged primarily in these areas.
| Width | 1100 mm (2-pipe)/1150 mm (4-pipe) |
| Height | 150 mm below the system floor (cavity or raised floor), upper edge of ventilation grille project-specific, at least 196 mm |
| Depth | 860 mm |
| Depth ventilation grilles | 340 mm |
| Outdoor air flow rate | 0 – 120 m³/h |
| Supply air flow rate | 60 – 200 m³/h |
| Nominal volume flow rate | 120 m³/h |
| Sound power level | 28 – 47 dB(A) |
Degree of heat recovery efficiency | 60 % |
| Maximum operating pressure, water side | 6 bar |
| Maximum operating temperature | 75 °C |
| Supply voltage | 1~ 230 V AC, ±10 %, 50/60 Hz |
| Power rating | 326 VA |
| Weight | 75 kg |
| RA-U-ZAS | – | 4 | – | 1 | / | AR | / | 1150 × 196 × 830 | / | C3 | – | MA | – | T | / | MR | / | C | / | Z | / | A | / | HVE | – | R | – | 0,04 | / | KVE | – | R | – | 0,40 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |||||||||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||||||||||||
1 Type
RA-U-ZAS Decentralised underfloor ventilation unit X-CUBE/ ROOMAIR-U-ZAS
2 Heat exchanger
2 2-pipe
4 4-pipe
3 Heat exchanger construction
Specify construction (technical design with TROX EPF or TROX
CONFIGURATOR)
4 Construction
AR Water connection on the right when seen from the room
AL Water connection on the left-hand side of the room
5 Nominal size [mm]
Width × height × depth
1100 × 196 × 830 (only with heat exchanger 2)
1150 × 196 × 830 (only with heat exchanger 4)
6 Control system
C3 with FSL-CONTROL III
7 Control function
MA Master
SL Slave
8 Real time clock
only with control function MA
No entry: without real time clock
T with real time clock
9 Interface
No entry: without interface
MT with Modbus TCP
MR with Modbus RTU (only with control function MA)
BI with BACnet IP
BM with BACnet MS/TP (only with control function MA)
10 Air quality sensor
only with control function MA
No entry: without air quality sensor
C with CO2sensor
V with VOC sensor
11 Supply air temperature sensor
Z with supply air temperature sensor
12 Outdoor air temperature sensor
only with control function MA
No entry: without outdoor air temperature sensor
A with outdoor air temperature sensor
13 Heating valve
HVE with electromotive actuator
14 Lockshield heating circuit
R with lockshield
15 Kvs value heating valve
0.25 (straight-way valve)
0.40 (straight-way valve)
0.63 (straight-way valve)
1.00 (straight-way valve)
F0.50 (pressure-independent control valve)
16 Cooling valve
only with heat exchanger 4
KVE with electromotive actuator
17 Lockshield cooling circuit
only with heat exchanger 4
R with lockshield
18 Kvs value cooling valve
only with heat exchanger 4
0.25 (straight-way valve)
0.40 (straight-way valve)
0.63 (straight-way valve)
1.00 (straight-way valve)
F0.50 (pressure-independent control valve)
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Contact
We are here for you
Please specify your message and type of request.
Tel.: +43 1 250 43-0 | Fax: +43 1 250 43 34
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.: +43 1 250 43-0| Fax: +43 1 250 43 34
