Technical Data - S+S Regeltechnik AERASGARD RLQ Operating Instructions, Mounting & Installation

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®
AERASGARD RLQ
The self-calibrating microprocessor-controlled room air quality sensor AERASGARD
is used to determine the room air quality on basis of a mixed gas sensor ⁄ VOC sensor
(VOC = volatile organic compounds).
It is used:
- For air quality measurement in offices, hotels, meeting rooms and convention centres,
apartments, stores, and restaurants, etc.
- For quantitative evaluation of room air pollution with contaminating gases
(cigarette smoke, body perspiration, exhaled breathing air, solvent vapours, emissions
from building members and cleaning agents)
- For adjustable sensitivity regarding the maximum air contamination to be expected
- For room ventilation as-needed, enabled by air changes only taking place when air is
polluted while conserving energy at the same time.
The sensor's service life is depending on the type of burden and gas concentration and is
more than 60 months under normal load conditions. The new design implies the alternative
to choose between three sensibility ranges by means of DIP switches, comparable to three
measuring ranges: LOW for low, MEDIUM (default, equivalent to the hitherto existing type
of this device) for medium, and HIGH for high VOC sensibility.
VOC is the abbreviation for volatile organic compounds. According to the definition by the
World Health Organization WHO, VOC are organic substances with a boiling range from
60 to 250 °C. Ranking among VOC are for example compounds of the substance groups
alkanes ⁄ alkenes, aromatic compounds, terpenes, halogenated hydrocarbons, esters,
aldehydes, and ketones. There is a large number of native VOC, which in part are released
into the atmosphere also in substantial quantities, e.g. terpenes and isoprene from forests.

TECHNICAL DATA:

Power supply: ........................ 24 V AC ⁄ DC, current consumption ca. 70 mA at 24 V
Power consumption: ................ < 3 VA at 24 V DC
Sensor:................................. VOC sensor (metal oxide),
Measuring range: .................... 0 ...100 % air quality; referred to calibrating gas;
Output: ................................. 0 - 10 V (0 V = clean air, 10 V = polluted air) or
Measuring accuracy: ............... ± 20 % of final value (referred to calibrating gas)
Detection of gases: ................. not selective
Electrical connection: .............. 0.14 - 1.5 mm ² via terminals on circuit board
Long-term stability:................. <10 % per year
Warm-up time: ...................... ca. 1 hour
Ambient temperature: ............. 0 ...+ 50 °C
Response time: ...................... < 60 s
Enclosure: ............................. plastic, material ABS,
Dimensions: ........................... 85 x 91 x 27 mm (Frija I )
Installation: ........................... wall mounting or on in-wall flush box, Ø 55 mm,
Protection class: .................... III (according to EN 60 730)
Protection type: ..................... IP 30 (according to EN 60 529)
Standards: ............................ CE-conformity, electromagnetic compatibility
Optional: ............................... traffic light indicator indicating actual air quality
with automatic self-calibration
multi-range switching (selectable via DIP switches)
VOC sensibility low, medium, high
4 ... 20 mA (selectable via jumper) or
with potential-free changeover contact (24 V),
switchpoint adjustable from 0 ...100 % of output signal
colour pure white (similar RAL 9010),
stainless steel enclosure optional
75 x 75 x 25 mm (stainless steel enclosure)
base with 4-hole for mounting on vertically or
horizontally installed in-wall flush boxes for cable
entry from the back, with predetermined breaking
point for on-wall cable entry from top ⁄ bottom
in case of plain on-wall installation
according to EN 61 326 + A1 + A2,
EMC directive 2004 ⁄ 108 ⁄ EC
® RLQ
Connecting diagram
1 UB- GND
2 UB+ supply voltage 24V AC/DC
3 GND
4 Output air quality 0-10 V / 4...20mA
Connecting diagram
1 UB- GND
UB+ supply voltage 24V AC/DC
2
3
GND
4
Output air quality 0-10 V / 4...20mA
5 Normally
open contact
6
7 Breaker
Schematic diagram
Pushbutton manual
calibration air quality
LED calibration
Selection output:
Voltage (V), default
Current (mA)
(RLQ-W)
7
are connected on the circuit board.
RLQ - A
RLQ - xx - W
changeover
(24 V)
RLQ - A
RLQ - xx - W
min. max.
ON
1 2 3 4 5 6
Selection output
U I
J1
6 5 4 3 2 1
GND terminals (1) and (3)
DIP switch (6) is not assigned!
RLQ
RLQ