GAS 222.35 AMEX
4 Installation and connection
4.1 Installation site requirements
Sample gas probes are intended for flange mounting.
• Installation site and installation position are determined
based on requirements specific to the application.
• If necessary, the connection piece should be slightly tilted
toward the centre of the channel.
• The installation site should be protected from the
weather.
• In addition, adequate and safe access for installation and
future maintenance work should be provided. Particularly
follow the uninstalled size of the probe tube!
If the probe is transported to the installation site in pieces, it
will first need to be assembled.
4.2 Installation
DANGER
Danger to life and explosion during installation and
maintenance
The unit must not be worked on (assembly, installation,
maintenance) in explosive atmospheres.
DANGER
Explosion hazard
When used in explosive areas
Flammable gasses and dust could ignite or explode.
Never operate the gas probe outside the specifications. Ex-
tracting gases or gas mixtures which are also explosive in the
absence of air is prohibited.
DANGER
Explosion hazard due to ignition of dust
When using the device in a dusty environment, routinely
clean dust from all components.
The ignition temperature resp. smouldering temperature of
flammable dusts resp. dust layers present must be consider-
ably higher than the maximum surface temperature of the
device (observe applicable standards and statutory regula-
tions).
If possible, take the electrical components which must be
opened for repair to a dust-free room. If unable to do so, pre-
vent dust from entering the housing.
DANGER
Explosion hazard due to flame propagation
Severe injuries and damage to the system
If the process holds a risk of flame propagation, install a
flame arrestor.
4.3 Installing the Inlet Filter
The inlet filter, if necessary with matching extension, must be
screwed in. The probe is then attached to the mating flange
using the included seals and screws.
4.4 Insulation
On heated probes completely insulate any exposed flange
areas and, if applicable, the connection piece to absolutely
prevent thermal bridges. The insulating material must meet
the application requirements and be weatherproof.
4.5 Connecting the Gas Line
The sample gas line must be carefully and properly connected
using a suitable fitting.
This table provides an overview of the sample gas probe con-
nections:
Probe
GAS 222
Reservoir
PAV01
Ball valve
pneu-
matic
drive
Control
valve
3/2-way
solenoid
valve
Connecting
flange
1)
DN65/PN6/
DN3“-150
2)
Sample gas
inlet
G3/4
Sample gas
outlet
NPT 1/4
Blowback
connection
G3/8
Test gas con-
nection
1)
Tube Ø6 mm
Tube Ø1/4
2)
Filling port
NPT 1/4
Condensate
G1/2
Bypass
NPT 1/4
Control air
G1/8
G1/4
NPT 1/4
Tab. 1:
Gas Probe Connections (Varies by Model)
1)
Varies by version.
2)
Only GAS 222.xx ANSI and GAS 222.xx AMEX
WARNING
Gas emanation
Sample gas can be harmful to the health!
Check the lines for leaks.
4.5.1 Blowback Connection
If the probe has a G3/8 blowback connection, without factory
installed blowback device it will be open. The blowback con-
nection must be sealed gas-tight prior to start-up.
DANGER
Toxic, corrosive gasses
Explosive or toxic gases can develop due to a leaking or open
blowback connection.
10
Bühler Technologies GmbH
BX460058 ◦ 01/2020
