P1.1, P1.1E
4.4 Connecting gas lines
The G1/4 female threads for the respective screw-in connections 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. metal piping to plastic bodies. If this cannot be avoided in isolated applications, screw the
metal connections into the pump body with care, never use force.
Lay the lines so the line at the inlet and outlet remains flexible for an adequate distance.
The pumps are marked
IN
for inlet and
OUT
for outlet at the mounting ring. Be sure the gas line connections are tight.
4.5 Electrical connections
WARNING
Hazardous electrical voltage
The device must be installed by trained staff only.
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
A switch or circuit breaker (in accordance with IEC 60947-1 and IEC 60947-3) is to be provided. This must be organized to be easily
accessible for the operator. The switch must be labelled as an isolating device for the unit. It must not be inserted into a mains
power line or interrupt the protective conductor. Furthermore, the switch must separate the sample gas pump from the live
parts for all the poles.
The sample gas pump must be secured against unacceptable excessive warming by using a suitable overload protection (motor
protection circuit breaker). Sample gas pumps with a BLDC motor have already integrated protection against excessive warming
in the motor electronics.
Observe the rated current for the protective switch (230 V = 0,48 A, 115 V = 0,84 A, 12 V DC = 1,55 A, 24 V DC = 0,8 A).
Make sure that mains voltage
and
frequency meet the specifications of the motor (voltage tolerance ± 5 % and frequency toler-
ance ± 2 %.)
The electrical connection of type P1.1 is made with the help of flat connectors size 6,3 mm.
Sample gas pumps of type P1.1 (12 V DC/24 V DC) and P1.1E (all voltages) are delivered as standard with a 3 m connecting cable.
If your sample gas pump has a factory-installed on/off switch on the housing (only P1.1E), verify it is set to the zero position be-
fore connecting to power.
WARNING
Hazardous electrical voltage
The On/Off switch does not ensure switching off all poles.
It is essential to connect the protective earth conductor to the marked protection earth terminal. At model P1.1E
(115 V/230 V) the protective earth has to be connected to the green/yellow wire of the connection cable (see Fig. Electrical connec-
tion P1.1 pumps).
Select mains and protection earth cross section according to the rated current.
For the electrical connections especially for the protective conductor use a cable cross-section from minimum 0,75 mm
2
.
Obey differing specifications on the type plate. The conditions at the installation site must meet all specifications on the type
plate.
All parts under voltage must be protected through appropriate measures against contact by persons or foreign body proced-
ures.
11
Bühler Technologies GmbH
BE420020 ◦ 03/2020
Summary of Contents for P1.1
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