ELQZ504

ELQZ504
GB.ELQZ504.050101
Installation Instructions for the
ELQZ-2-504 Air Quality Sensor, GOLD
General
The carbon dioxide content of the indoor air is an effective
indicator of how many occupants are in a room and the
degree of ventilation required to maintain the air quality
we need. Ventilation control based on CO2 measurements
guarantee the adequate supply of fresh air, and at the
same time keeps energy costs as low as possible.
Function
The air quality sensor transmits a 0–10 V output signal
that is proportional to its working range of 500–1500
ppm. The output signal is linear with the CO2 content.
GOLD Version B
Set the GOLD air handling unit to ”VAV REQUIRED” which
you’ll find below the Functions Menu ”FAN CONTROL”
(see the Operating & Maintenance Instructions). Set the
set point required. The set point is expressed as a percentage of the operating range of the sensor. If a set point of
1000 ppm, for example, is desirable, set the set point at
50%. This setting can be entered below the Flow menu
group and ”VAV CONTROL”, see the Operating & Maintenance Instructions. The supply air and the extract air flows
are controlled in parallel by the output signal transmitted
from the sensor.
VAV Regulation is also described in the Operating & Maintenance Instructions.
3. Push the intermediate plate together with cover
upward and hold firmly against the base plate.
Mounting
Locate the sensor where the indoor climatic conditions are
typical for the premises. Avoid any spot where the sensor
would be exposed to direct draught or poor air mixture. We
advise locating the sensor at least 2 metres above the
floor to minimize the risk of physical damage or inaccurate
readings due to direct exposure to exhaled air. Access to
the sensor is needed for checking its function and servicing only.
1. Route the cable to where the sensor is to be located.
The cable can be recessed in the wall or other surface and
should then be passed into the air quality sensor through
its bottom section. If the wire is surface-mounted, it can
be passed into the sensor through one of the knockout
lead-throughs in the top of the sensor.
2. Back off the screw and pull the top section straight
upward.
Specifications are subject to alteration without notice.
4. Bend the intermediate plate with cover obliquely
outward and detach it from the hooks. 1
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GB.ELQZ504.050101
5. Secure the base plate by means of screws to the wall.
The screw head should be max. 4 mm.
6. A Insert the hooks into the holes in the upper
section of the base plate.
B
Press the front against the base plate until its
hooks lock into the bottom edge of the front.
Technical Data
Supply voltage
Frequency
Power consumed
Output signal
Measuring range
Accuracy
Warm-up period
Response time
Wiring nuts
Enclosure Class IP 20
Operating temperature
Storage temperature
Dimensions (H×W×D)
24 V AC ± 20%
50/60 Hz
3W
0–10 VDC
500–1500 ppm
± 1% of the measuring range
± 5% of the reading
< 1 min.
< 2 min.
for max. 1,5 mm²
0 till +50 °C
-20 till +70°C
120×82×30
A
B
7. Push in the top section under the locking hooks in the
base plate and secure it in position by means of the screw.
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Specifications are subject to alteration without notice.
GB.ELQZ504.050101
Electrical Connections
A qualified electrician should wire electrical connections in
accordance with local regulations.
Air Quality Sensor
104
2
103
3
52
Terminal in
junction hood
Starting point
1
Current
Voltage
50
Terminal on control
printed-circuit card
Current
Voltage
Specifications are subject to alteration without notice.
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