Comefri TZAF FF Operating And Maintenance Instructions Manual

Air Conditioning Division
OPERATING AND MAINTENANCE INSTRUCTIONS OF RADIAL FANS
TZAF FF – VTZ – NTHZ - THLZ FF – MAZ – MHZ – TLZ – TLI – TZAF -
THLZ - HLZ - TLE – THLE
AND CENTRIFUGAL IMPELLERS FOR PLENUM FANS
NPL – NPA – TE – PEAF* – NPE*
(This manual includes the fan arrangement according to
"Atex" and anti-spark standard 94/9/EC)
* Series currently not in production but available for spare parts in compliance with this manual.
1 FOREWORD
All Comefri fans are manufactured according to our Quality Assurance System, in
compliance with BS EN ISO 9001; since 1987 our Quality System is certified by BSI
(certificate n. FM 01403). Moreover all fans equipped with motor and belt drive are tested
accurately before leaving the factory.
Comefri fans are of the state of the art design and comply with the requirements for
health and safety of the Machinery Directive 2006/42/EC. Comefri defines:
Machine
All fans equipped with connected motor and drive, provided with all the protections
necessary to meet the requirements of the Machinery Directive 2006/42/EC.
Partly Completed Machinery
All other fans which are not included in the previous definition.
This Operating&Maintenance manual (which can be downloaded on www.comefri.com):
- describes the applications for the fans, according to the national Standards,
Regulations and Directives, which must be closely observed to avoid possible damage
caused by incorrect installation or mishandling;
- contains notes for health and safety;
- warns of danger which can even occur with correct applications;
- must be read and observed by all personnel. These indications are not the only safety
procedure: any operations made on moving and/or electrical parts, such as installation
and maintenance, require special attention guaranteed only by skilled staff familiar with
safety rules. Besides observance of these instructions, local laws must also be
respected.
- must be accompanied by the relative technical catalogue of the individual product which
must be consulted for all specific information not included in this manual.
The warranty is valid for one year from the delivery date unless otherwise agreed prior to
placing the order. The warranty only applicable to manufacturing defects, which must be
immediately reported to the manufacturer. A precondition of the warranty is the
observance of the operating instructions. Damage which can be traced back to improper
installation procedures, to the use of damaged fans or unauthorized alterations to the
fans, such as repairs, are not covered by the Comefri warranty and Comefri is not liable
for resulting damage and costs.
Cooke Industries - Phone: +64-9-579 2185 Fax: +64-9-579 2181 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz
Operating and Maintenance Manual - Air Conditioning Division
2 TECHNICAL DESCRIPTION
2.1 Fan description
The Comefri fan series TZAF FF, VTZ, NTHZ, THLZ FF, MAZ, MHZ, TLZ, TLI, TZAF,
THLZ, HLZ, TLE, THLE are centrifugal fans where the air flows axially into the wheel and
is discharged radially in the volute. The performances allow medium and low air
deliveries and medium and high pressures. See the technical documentation in the
relative technical catalogue for the performance of the specific fan. The impellers of our
centrifugal fans can be fitted with forward-curved blades, backward-curved blades or
airfoil backward-curved blades.
The MAZ and MHZ series have more solid features than the TZAF FF and NTHZ series
which makes them specific for heavy-duty air conditioning and industrial applications
where reliability, solidity and easy maintenance play a vital role.
The features of each fan series are specified in the technical catalogue that must be
consulted to identify the suitability of the fan for the fluid treated by the system.
Comefri centrifugal fans, with double or single inlet, can be completed with a wide range
of accessories, according to application and installation requirements. The range of
accessories is also completed by protection fittings, in conformity with UNI EN ISO
13857, available on demand. Comefri declines all liability for damage to persons or
objects caused by absence of safety devices.
Particular attention must be paid in case of direct contact with rotating parts. If this is the
case, the use of specific and adequate personal protective measures (PPE) is essential.
2.2 Description of centrifugal impellers for plenum
The Comefri NPL, NPE, TE series have backward-curved blades while the NPA, PEAF
series have airfoil backward-curved bladed impellers. The performances allow medium
and low air deliveries and medium and high pressures. See the technical documentation
in the relative technical catalogue to make sure the fan is suitable for the fluid treated by
the system.
Comefri impellers for plenum can be provided as an impeller unit + inlet-cone or
according to the arrangements summarized in the Appendix.
Comefri impellers can be completed with a wide range of accessories, according to
application and installation requirements. The range of accessories is also completed by
protection fittings for the inlet-cone and arrangements 4, 5S, in conformity with UNI EN
ISO 13857, available on demand. Comefri declines all liability for any damage to persons
or objects caused by absence of safety devices. Particular attention must be paid in case
of direct contact with rotating parts: plenum fans do not meet the provisions of the CE
labelling (e.g. they have an impeller without guards). The fan must nevertheless be
installed in accordance with CE requirements.
Make sure that the fan is always
accompanied by this manual.
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