8
DAX 3F-I
Examples of placement for some flammable gases * :
Gas
Formula
Density (air=1)
Detector(s) position
Acetylene
(CH)
2
0.90
C floor
Butane
C
4
H
10
2.05
Floor
Cracked gas
-
0.47
Ceiling
Ethylene oxide
C
2
H
4
O
1.52
Floor
Hydrogen
H
2
0.07
Ceiling
Isobutane
(CH
3
)
3
CH
2.00
Floor
Methane
CH
4
0.55
Ceiling
Natural gas
-
0.68
Ceiling
Propane
C
3
H
8
1.56
Floor
Propane-air
-
±1.15
C floor
* This list is not exhaustive. Contact Dalemans for further information.
Mounting
The detector should be mounted flat on a wall and according to the mechanical pattern given in
f igure 3.
Attach the detector to the wall using the original external mounting brackets supplied with the
detector or using suitable screws and plugs for direct mounting. Unused holes of the junction box
must always be closed using the plastic plugs which are enclosed with the mounting kit.
The sensing head should never be installed pointing upwards. Make sure that dust will not block
the filter and that water will not run into the sensing head.
Figure 4 : Direct mounting
Junction box
M8 screw
Sealing serrated
washer
