HERZ
GmbH
BA HD240 V30 R24 10_2017 EU short.doc
11
1.
GENERAL INSTRUCTIONS
CAUTION
The ‘FJET’ blowers - exhausters have been
designed and manufactured for use in an
industrial environment, operated by qualified
personnel and as a unit to be incorporated in a
machine, which conforms to the CE Machinery
Directive.
The ‘FJET’ blowers - exhausters, like all
machinery and equipment with live and moving
parts, can be a source of serious hazards unless
properly used and protected.
The user is committed to ensure that:
All handling, assembly, installation, connection,
maintenance
and
repair
operations
are
undertaken by qualified personnel. Such people
who by their background, training and experience
as well as through their knowledge of statutory
regulations, legislation, safety measures and
operating conditions are able to carry out any
necessary steps avoiding all possible risks to
health and damage.
Such personnel should have received all the instructions
and information, including any local legislation, and will
follow them during the performance of any operation.
It shall be forbidden for unqualified personnel to carry out
any operation, even indirectly, on the machines and
equipment.
During the installation, all the prescribed working
conditions, including any possible local requirements, shall
be observed. Additionally it is forbidden to put the unit in
service before the machines of which they are a part are
declared to conform to the CE Machinery Directive.
The user must be aware that in operation:
•
the surface temperatures can reach 160°C;
•
the unit cannot contain high internal pressures, no
greater than Ps referred to in SN 1867;
•
there is small loss of the fluid handled;
•
the level of noise may be unacceptable in certain
applications.
1.1
CONDITIONS OF USE
The ‘FJET’ blowers - exhausters are designed for the continuous
movement of air or non-explosive, non-hazardous and
nonflammable gases and for service in non-explosive
environments.
Solid particles, however small, including dirt can cause serious
damage; therefore it is essential that such substances should be
removed from the gas by suitable filters upstream of the inlet.
(Units which do not have an adequate filter ARE NOT
COVERED BY THE GUARANTEE).
The maximum driving pressure must never be exceeded
(
Δ
pmax of SN 1867).
UNDER NO CIRCUMSTANCES OPERATE THE UNIT WITH
THE GAS INLET OR OUTLET CLOSED. IN PARTICULAR
THIS APPLIES TO THE UNITS WITH THE CAPACITY FOR
HIGHER DRIVING PRESSURES.
Protect the units with an appropriate safety valve.
The performance characteristics are liable to variations due to
the following factors:
•
Differences of the suction or discharge pressures from the
reference conditions (1013 mbar);
•
Operation in a system with both a low suction pressure
and a high back pressure;
•
Operation with a gas at a different temperature or of a
different specific gravity from the reference data (1.23
kg/m
3
; 15 °C);
•
Variations in the rotational velocity of the fan with respect
to the reference value.
Both the gas inlet temperature and the ambient temperature
must be in the range of -15°C to +40°C.
At the same time, ensure that the unit has good ambient
ventilation, especially when subjected to severe operating
conditions. A unit subjected to frequent starting or to high
ambient temperatures may be prone to overheating and in such
cases further information should be requested. Similarly, where
flammable gases may be present, information must be
requested for alternative models certified for the Ex.
environment.
1.2
STORAGE AND SHIPPING
Store the unit in a dry place, preferably in original packaging.
Do not remove the protection plugs from the ports. Avoid
stacking anything on top of the packaging.
To move the packed boxes, use the largest pallet or support
base possible to obtain the maximum stability.
On all occasions handle the units with care and avoid sudden
impacts.
Lifting eyes are provided to unpack units weighting
more than 25
kg. (The weight of the unit is M in SN 1867).
1.3.1.1
INSTALLATION
1.3.2
‘FJET’ BLOWER – EXHAUSTER
It is important that the unit is installed in a well-ventilated
environment where the temperature does not exceed 40°C.
If outside, protect the unit from direct sunlight and avoid the
possibility of water collecting in the external crevices especially
when installed with the axis vertical.
IMPORTANT!
Ingress of foreign matter, however small, will cause serious
damage.
Such matter includes dust, sand, masonry debris, impurities in
the tubes, cutting burrs or filings, welding or soldering slag and
splatter, metal burrs and any residues from sealing and making
the tube connections.
The unit can be mounted with the axis in any position. As
supplied, the unit is balanced and will not transmit vibrations,
however it is recommended that it be mounted on vibration
damping supports. To connect the accessories, remove the
flanges from the unit and then seal and tighten.
Do not over tighten remembering that the operating pressures
are low.
Tube connections must be made with flexible couplings.
Avoid using rigid couplings, which will induce stress and cause
harmful vibrations.
Remember to protect the inlet with suitable filters.
If it is necessary to regulate the flow, install a bypass valve (refer
to section 1.5).
Only remove the plugs on the ports when making the final
connections.
