TBLZ74
GB.TBLZ74.160408
dh = D
ØD
Installation Instructions for the TBLZ-1-74-a Air quality
sensor, duct mounting, GOLD/COMPACT
dh =
2xHxB
H+B
H
B
1. General
The carbon dioxide content of the indoor air is an effective
indicator of the occupancy load and the amount of ventilation
required in the room. Ventilation control based on CO2 measurements can ensure the ample supply of fresh air, while the energy
cost will be as low as possible.
Examples of sources of disturbance
MIN 5xd h
MIN 3xd h
MIN 3xd h
GX
GX
MIN 5xd h
GX
GX
1.2 Operation
The air quality sensor has an output signal of 0 – 10 V which corresponds to an operating range of 500 – 1500 ppm. The output
signal is linear in relation to the CO2content.
FAN
MIN 3xd h
2. Installation
MIN 5xd h
MIN 3xd h
GX
GX
Demand control
MIN 5xd h
GX
GX
COIL
MIN 3xd h
GX
GX
SILENCER
MIN 3xd h
Set the air handling unit to DEMAND CONTROL under the
FAN REGULATION function menu (GOLD LP/COMPACT) or to
Demand under Functions/Airflow/Regulation mode (GOLD RX/
PX/CX/SD, Version E/F).
Set the set point required as a percentage of the sensor’s operating range. If a set point of 1000 ppm is required, for instance,
set the set point to 50%. Enter the setting under the Flow/
Pressure menu group (GOLD LP/COMPACT) or under Functions/
Airflow/Operation level (GOLD RX/PX/CX/SD, Version E/F). See
the Operating and Maintenance Instructions.
DAMPER
MIN 5xd h
GX
BEND
GX
MIN 5xd h
GX
MIN 3xd h
BRANCH
ReCO2
Set the GOLD unit to *CO2* under the ReCO2 function menu
(GOLD LP/COMPACT) or under Functions/ReCO2 (GOLD RX/PX/
CX/SD Version E/F).
Set the set point required as a percentage of the sensor's operating range. If a set point of 1000 ppm is required, for instance,
set the set point to 50%. Enter the setting under the Flow/
Pressure menu group (GOLD LP/COMPACT) or under Functions/
ReCO2/CO2 (GOLD RX/PX/CX/SD Version E/F). See the Operating
and Maintenance Instructions.
MIN 3xd h
GX
MIN 3xd h
MIN 5xd h
GX
GX
GX
MIN 5xd h
ADAPTER
EXTRACT AIR
SUPPLY AIR
AIR HANDLING UNIT
2.2 Installation
Position the air quality sensor in the direction of flow, according to the airflow direction arrow. The sensor can be mounted
horizontally or vertically in a vertical or horizontal airflow.
If there are large temperature differences, e.g. outside or in cold
attics, the sensor must be insulated from the surrounding air
(due to the risk of condensation build-up in the sensor housing).
To ensure optimum operation the air quality sensor should be
positioned so that the distance to the nearest interfering source
in the duct (see example of interfering sources), in the direction
of airflow, is at least the same as 3 x the duct’s hydraulic diameter. Nearest location after an interfering source should be at least
5 x the duct’s hydraulic diameter.
Hydraulic diameter
CIRCULAR DUCT
dh = D
ØD
RECTANGULAR DUCT
dh =
2xHxB
H+B
H
B
We reserve the right to alter specifications.
MIN 3xd h
GX
MIN 5xd h
GX
MIN 3xd h
GX
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MIN 5xd h
GX
1
GB.TBLZ74.160408
Item 4
• Mount the tube and sensor onto the duct.
• Secure the sensor housing at 3 points indicated by the arrows.
Item 1
• Drill holes in the duct. See Items 8 and 9.
N.B.! IMPORTANT!
The airflow direction arrows on the air quality sensor (see the
shape of the detector’s base or the top of the housing) must
point in the same direction as the air flow in the duct.
Item 2
• Measure the ventilation duct.
• Cut the tube, if required, see Item 8. Insert the end plug.
Do not cut this end!
End plug
Item 3
• Insert the seal onto the tube.
• Insert the tube into the bottom of the sensor housing.
• Lock the tube using the stop screw.
Stop screw
5
Item 5
The air quality sensor is equipped with an airflow indicator, a red
plastic tab, which, when the sensor is correctly installed, swings
out due to the air flow.
N.B.! If the indicator does not move at all, consider relocating the
sensor at a new position.
Airflow indicator
2
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GB.TBLZ74.160408
Item 6
Electrical installation.
Open the cover above the junction hood by lifting the snap-on
fastener. Insert the cable through any cable grommet.
Item 7
Performance checks
• Move the test hole plug to the side and blow on the detector.
N.B.! Refit the test hole plug.
Snap-on fastener
Grommet
• Select 0 – 10 V operation by putting the jumper in the voltage
position.
Item 8
Installing different tubes in different duct widths.
Outp. 2 Outp. 1
Jumper for a
0% or 20%
output signal starting
level
20% 0%
1
G+
24V AC/DC
2
G0
System earth
3
+ Out 1 CO2 (500-1500 ppm)
4
+ Out 2 Temperature (0 – 50°C)
For ducts up to and including 600 mm use a 600 mm venturi
tube, standard. For ducts larger than 600 mm and up to and
including 1,400 mm, use a 1,500 mm venturi tube.
600 mm Venturi tube.
Current
Voltage
Current
Voltage
Opening
ø 38 mm
Jumper for selection of
electric current or voltage of output signal
Cut the Venturi tube, if required,
to the right length. The tube should cover at
least 90% of the duct’s diameter.
1,500 mm Venturi tube.
Opening
ø 38 mm
N.B.!
Opening
ø 51 mm
The Venturi tube
must go through
the entire duct.
• Cut the tube to the
correct length.
• Insert the end plug.
• Fit the terminal seal
• Install rubber seal TET
26-35 as a bearing.
Max. tube of 30 mm outside the duct.
We reserve the right to alter specifications.
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3
GB.TBLZ74.160408
Item 9
Mounting fittings for circular or insulated flat ducts
The duct diameter can be as small as 100 mm using the bracket.
Circular duct.
The bracket is supplied flat.
Rubber
seal.
Insulated flat duct.
The bracket is easy to bend/shape so that it fits circular or flat
ducts.
Fasten the
bracket's
legs to the duct.
Rubber
seal.
Item 10
Final checks
Check that the positioning arrow points towards the direction of
flow.
Check that the plug for the test hole is properly installed.
Check that the airflow indicator shows flow (rocks).
Opening
Ø 51 mm.
4
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GB.TBLZ74.160408
2.3 Electrical Connections.
The electrical connections should be wired by a qualified electrician in accordance with local electrical safety regulations.
GOLD RX/PX/CX/SD, Version E/F
Demand control or RECO2
Air quality sensor
GOLD RX/PX/CX/SD
IQlogic control unit
Jumper for a 0% or 20%
output signal starting level
Jumper for selection of
electric current or voltage of output signal
Outp. 2 Outp. 1
20% 0%
1
G+
1
2
G0
2
3
+ Out 1
3
4
+ Out 2
1
31 G+
2
32 G0
3
18
19
Current
Voltage
Current
Voltage
The following applies to the size
100/120 GOLD units only:
If the total load on Terminals 31-32
is higher than 16 VA, then Terminals
201 (G) and 202 (G0) must be used.
Terminals 201-202 can be loaded
with a total of max. 48 VA.
GOLD LP/COMPACT
Demand control
Air quality sensor
GOLD LP/COMPACT
IQnomic control unit
Jumper for a 0% or 20%
output signal starting level
Jumper for selection of
electric current or voltage of output signal
Outp. 2 Outp. 1
20% 0%
Current
Voltage
Current
Voltage
We reserve the right to alter specifications.
1
G+
1
2
G0
2
3
+ Out 1
3
4
+ Out 2
1
9 G+
2
10 G0
35
3
37*
*Demand control should be selected for
the one fan and slave control should be
selected to the other fan if so desired.
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5
GB.TBLZ74.160408
3. Technical Data
Power supply
Frequency Power consumption Input signal Range of measurement
Accuracy
Warm-up period Reply promtness
Enclosure Class Operating temperature Storage temperature 24 V AC ± 20%
50/60 Hz
<3W
0 – 10 V DC.
500 – 1500 ppm
± 1% of the range of measurement
± 5% of measured value
< 1 min.
2 min.
IP 54
0 to +50 °C
-20° to +70°C
4. Dimensions
Length of Venturi tube: 600 alt. 1500 mm.
150
85
180
146
154
35
27
(All dimensions are given in mm)
6
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We reserve the right to alter specifications.
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