SenseAir aSENSE User manual

Installation Manual
aSENSE
Dismounting of the sensor
Pull the top part upwards
Push the front part upwards while Fold the front part forwards and
keeping the wall plate steady loose it from the hooks (#1)
3
2
5
14
1
1 Top part
2 Front part
3 Wall plate
4 Screw
5 Label with
settings inside
the top part

Mounting of the sensor
The wall plate is screwed onto the wall (A) Put the top tabs of the front part into the top
holes of the wall plate.
(B) Press the lower edge of the case onto
the wall plate to latch
If the connection cables are drawn through a conduit the conduit must be sealed.
Air of different temperature may otherwise disturb the temperature measurements.
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The top part is pushed under the Terminals and jumpers on aSENSE.
locking hooks of the wall plate The darker positions are default settings.
and is secured with a screw Terminals and jumpers are located under the top part.
NOTE!
If for some reason the PCB must be removed it must be handed carefully and protected from
electrostatic discharge! Normally, removing the PCB is not required.
A
B
Screw head diameter: max 7.5 mm
Screw head height: max 2.5 mm

Electrical connections
The power supply has to be connected to and . is considered as system ground. The
same ground reference has to be used for the aSENSE VAV unit and for any connected device! Unless
different transformers are used, special precautions need to be taken.
NOTE!
The signal ground is not galvanically separated from the aSENSE VAV power supply!
NOTE!
The same ground reference has to be used for the aSENSE VAV unit and for any connected device!
If possible keep the sensor powered up after mounting. Connect the analogue output before
measuring.
Connection
Terminal
Function
Electrical Data
Remarks
Power (+)
Power ground (-)
24 VAC/DC+ (+-20%), 1W
24 VAC/DC-
See note 1
Out(1)
CO2
Out(2)
Temp
Analogue Output 1 (+)
Standard 0-2000ppm
See label for non-
standard
Analogue Output 2 (+)
Standard temperature
0-50 oC or 32-122 oF
See label for non-
standard
0-10 VDC or 0-20 mA
2-10 VDC or 0-20 mA or
See label
Same as Output 1
According to positions of Out(1)
and start point jumpers.
See note 1!
According to positions of Out(2)
and start point jumpers.
See note 1 and 2!
Note 1: The ground terminal is used as negative power supply DC input or AC phase ground
(halfwave rectifier). A single transformer may be used for the entire system.
Note 2: aSENSE can deliver a voltage or a current loop for Out(1) / Out(2). To change between
voltage and current output mode the hardware jumpers are used. There is one jumper for Out(1) and
one for Out(2), so that one output can be a voltage output and the other a current output. Both, voltage
output and current output can have start points 0 % (0-10 VDC or 0-20mA) or 20% (2-10 VDC or 4-
20mA). The same start point is used for both outputs. See the user manual.
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Dimensions and holes
Dimensions of sensor in mm and (inches)
Mounting of the sensor onto the wall
Screw head diameter: max 7.5 mm
Screw head height: max 2.5 mm
Dimensions of mounting plate in mm and (inches)
120(4,72)
31(1,22)
83(3,26)
29,8(1,17)
30(1,18)
7,8(0,31)
4,2(0,16)
2(0,08)
52,5(2,07)
30(1,18)
25(0,98)
30(1,18)
SenseAir®AB (headquarter)
Stationsgatan 12 Phone: +46-(0)653 - 71 77 70
Box 96 E-mail: [e-mail]
824 08 Delsbo
SWEDEN Web site: www.senseair.com