SenseAir aSENSE User manual

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Installation Manual for all housings
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CO
2
/ temperature transmitter for wall mounting
Dismounting of the sensor
3
2
5
1
4
Pull the top part upwards
1
Push the front part upwards while Fold the front part forwards and
keeping the wall plate steady loose it from the hooks (#1)
1
top part
2 front part
3 wall plate
4 screw
5 label with
settings
inside the top
part

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Mounting of the sensor
A
B
The wall plate is screwed onto the wall A Put the top tabs of the front part into the top holes of
The screw heads should be max 4 mm the wall plate.
B Press the lower edge of the case onto the wall plate to
latch
The top part is pushed under the Terminals and jumpers on 
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.
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.
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.

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CO
2
/ temperature transmitter for mounting in
ventilation ducts
1
2
1
2
3
4
5
6
7
9
8
1 Sampling probe 6 O-ring 29,2x3,53 (Factory supplied mounted in box)
2 Sealing gasket 7 PCB (Factory supplied mounted in box)
3 Largest locking nob 8 Snap-in lid
4 2 washers BRB 5,3x10x1 9 PG9 cable entry bushing
5 2 screws RXS 4,8x16

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Mounting of 
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 on to the duct.
11
10
10 Hole with 25 mm diameter
11 Temperature sensor with 110 mm cable mounted in the sampling probe
Mounting Instruction
Since there might be a substantial pressure difference in duct mounting applications, it is
essential to avoid ambient air from suction into the duct mounting box. For correct function it
is indispensible that the sealings of the the box cover, the cable entry bushings, the cable feed
through and the duct entrance are absolutly tight. The duct entrance may need extra sealing
paste in order to prevent leakage. The PCB must be handed carefully and protected from
electrostatic discharge.
1) Electrical cable entry: The box has a factory mounted cable entry bushing in dimension
PG9. Never feed more than one cable through each cable entry bushing, or else gas might
leak through!
2) Mounting the tube: Drill a hole (10) with 25 mm diameter (or 1 inch) for the sampling
probe and two holes with 4 mm diameter for the screws (5) into the air duct and mount
the tube (1) with the gasket (2). The sampling probe should be mounted with the largest
locking nob on top. The unit can be mounted with the air coming from the left or right.
3) Attaching the sensor box is made to the sampling probe by a snap-in bayonet fitting.
First, carefully stick the temperature probe (11) into the sampling probe. (1). Orient the
box onto the sampling probe so that the box upside is on the same side as the largest
locking nob (3). When the probe is fitted into the notches of the box, then turn the box
clockwise until stop (see Figure 1). Position 1 indicates open where the box can be
removed from the sampling probe. In position 2 the box is locked to the probe .

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CO
2
/ temperature transmitter mounted in industrial
housing
5
7
6 3
4
2
1
1 Wall plate 5 Snap-in lid
2 PCB (Factory supplied mounted in box) 6 Locking screw of the lid (not shown)
3 Temperature sensor 7 PG9 cable entry bushing
4 Hole for wall plate hooks

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8 Lidlocking screw
9 Wall plate
10 Screw to hold the wall plate
Dismounting the wall plate
The sensor is delivered with the wall plate mounted. The wall plate has to be removed before
the sensor is mounted onto the wall. Unscrew the screw on the side of the box. See figure 3.
Wall Mounting Instruction
Normally the PCB should not be removed from the housing. If for some reason the PCB must
be removed it must be handed carefully and protected from electrostatic discharge.
1) Electrical cable entry: The box has a factory mounted cable entry bushing in
dimension PG9. Never feed more than one cable through each cable entry bushing, or
else gas might leak through!
2) Screw the wall plate onto the wall: The wall plate has holes for three screws. Drill
holes for 3,5mm screws and put dowel into them. Dowels and screws 3,5 x 25mm are
included in a plastic bag
3) Attaching the sensor box to the wall plate is done by a snap-in fitting. The wall plate
has three hooks that fit in holes in the sensor box. Fasten the screw on the side of the
box.
4) The lid can be locked with the screw at the bottom of the sensor box.
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.

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Electrical connections (for all housings)
The power supply has to be connected to G+ and G0. G0 is considered as system ground. If
the analogue output is connected to a controller the same ground reference has to be used for
the 
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unit and for the control system! Unless different transformers are used, special
precautions need to be taken.
PLEASE NOTE! The 
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signal
ground is not galvanically separated from
the 
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power supply!
NOTE!
The same ground reference has to be
used for the 
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unit and for
the control system!
Connect the power after mounting. The
analogue output should be connected
before measuring.
Connection
Terminal
Function
Electrical Data Remarks
G+
G0
Power (+)
Power ground (-)
24 VAC/DC+ (+-20%), 3W
24 VAC/DC-
2W without output
load
See note 1!
OUT 1
OUT 2
M
Analogue Output 1 (+)
Analogue Output 2 (+)
Signal Ground (-)
0-10 VDC or 0-20 mA,
2-10 VDC or 4-20 mA,
Same as Output 1
Connected to G0 via PTC fuse
According to
positions of OUT1
and start point
jumpers.
See note 2!
According to
positions of OUT2
and start point
jumpers.
See note 2!
See note 1!
Note 1: The ground terminal is used as negative power supply DC input or AC phase ground G0
(halfwave rectifier). The signal ground M, protected by a PTC resistor, is the same as power ground
G0 (permitting a ”3-wire” configuration). A single transformer may be used for the entire system.
Note 2: 
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can deliver a voltage or a current loop for OUT1/OUT2. To change between
voltage and current output mode the hardware jumpers are used. There is one jumper for OUT1 and
one for OUT2, so that one output can be a voltage output and the other a current output. Both, voltage

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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 function manual.
Terminals and jumpers on 
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.The darker positions are default settings.
For Sensors in Duct Mounted Applications or in Industrial Housing
If more holes are needed the box has several knock-outs, prefabricated spots for holes in two
dimensions, PG7 and PG9. In order to make a hole, put a screwdriver in the groove and hit
firmly. Then fasten and seal properly, using any of the enclosed cable bushings. Never feed
more than one cable through each cable entry bushing, or else gas might leak through!
The PCB should be removed during the making of holes. The PCB must be handed carefully
and protected from electrostatic discharge!