Installation And Connection; Special Condition Moist Sample Gas - Buhler P1.2 Guía Rápida

P1.2, P1.2E

4 Installation and connection

Check the equipment for damage before installation. Among
other things, this could be a damaged housing, supply cables,
etc.. Never use equipment with obvious damage.
CAUTION
Use appropriate tools
According to DIN EN 1127-1, the operator is responsible to se-
lect and use appropriate tools.
4.1 Requirements to the installation site
CAUTION
Damage to the device
Protect the equipment against dust, falling objects and ex-
ternal impacts.
Stroke of lightning
Outdoor installation is forbidden. As a matter of principle, the
operator must regard all applicable standards according pre-
vention of damage due to lightning, which may otherwise
damage the device.
CAUTION
Avoid vibrations and resonances
The operator is responsible to mount the pump in a way that
vibrations and resonance do not cause premature failure res-
ulting in creating an effective ignition source.
The sample gas pump P1.2 (without housing) is an integrated
unit which may only be operated inside a housing providing
adequate protection against touching live or moving parts
(fan). Water and contaminants must be prevented from en-
tering.
Never block the vent, and the exhaust air – including from ad-
jacent units – must not be immediately suctioned in.
The motor is rated for ambient temperatures of 0 °C to +50 °C
as well as installation altitudes ≤ 1000 m above sea level.
Please refer to chapter "Appendices" at the end of the operat-
ing and installation instructions for additional installation
site ambient parameters.
4.2 Installation
CAUTION
Damage to the device
Protect the device, especially the gas inlets and tubes, against
dust, falling parts and external impact.
Use suitable rubber-metal buffers when installing to mount-
ing plates. We recommend buffers with a diameter or 10 mm,
a height of 10 mm and a shore hardness of 70. These are also
available from us.
The base angle of the sample gas pump features 4x M4
tapped holes for mounting the buffers. Suitable buffers and
assembly brackets are accessories which may be ordered sep-
arately from us.
10 Bühler Technologies GmbH
While installing the sample gas pump, there must be suffi-
cient spacing between the motor and the rear wall (20mm).
If you are using a sample gas pump with housing (type P1.2E),
the required distance between the housing and the rear wall
is 50mm. This is due to the minimum permitted bending ra-
dius of the power supply line.
The specific mounting bracket for the various product vari-
ants can be obtained as an accessory. Using the appropriate
mounting bracket guarantees the correct distance between
the device and the rear wall.

4.3 Special condition moist sample gas

Applications where the sample gas is still moist may result in
condensate forming in line and the pump body. In these
events the pump head must be suspended (pump body facing
down).
If the pump was not ordered this way, it can easily be conver-
ted on site.
Install the line between the gas output and condensate drain
with a grade so the condensate can drain and does not collect
inside the pump or the lines.
4.4 Connecting the gas lines
The G1/4" threaded holes for the respective screw-in connec-
tions are factory closed with plastic plugs to protect from dirt.
Screw-in connections are generally not included in delivery,
but are sold separately for metric or for imperial installation.
Avoid mixed-material installation, i.e. piping on plastic bod-
ies. If this cannot be avoided in isolated applications, screw
the metal connections into the PTFE pump body with care,
never use force.
Lay the lines so the line at the inlet and outlet remains flexible
for an adequate distance (pump vibrates).
The pumps are marked "In" for inlet and "Out" for outlet. Be
sure the gas line connections are tight.
4.4.1 Monitoring the sample gas pump
NOTICE
When following preventive maintenance according to the
maintenance plan, a crack in the bellows is a rare malfunc-
tion, but cannot be completely eliminated.
NOTICE
If the bellow cracked, turn the pump off immediately!
NOTICE
If flammable gases (even above upper explosion limit (UEL))
or toxic gases are supplied, continuous monitoring of the
pump is mandatory.
BX420021 ◦ 03/2020