Operating and Maintenance Manual - Air Conditioning Division
Make sure that the fan is always accompanied
by this manual.
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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 – KHLE
AND PLENUM FANS
NPL – NPL
ALU
– NPA – NPA
ALU
– TE – PEAF* – NPE*
(This manual includes the fan and plenum fan arrangement according to
standard EN 14986 to comply with “ATEX” Directive 94/9/EC)
* THLZ sizes over 450, HLZ, PEAF, NPE series currently not in production but available for spare parts in compliance with this manual.
1 FOREWORD
All Comefri fans and plenum 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 and plenum fans equipped with motor
are tested accurately before leaving the factory.
Comefri fans and plenum fans are placed on the market in conformity with the
requirements of “ErP” Directive 2009/125/EC and its relevant Regulation N° 327/2011
implementing the Directive in regard with the different product characteristics in terms of
manufacturing and supplying (see par.8);
they 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 and plenum 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 and plenum 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 and plenum fans according to the national Stan-
dards, 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 is 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 fan or plenum fans or unauthorized
alterations to it, such as repairs, are not covered by the Comefri warranty and Comefri is
not liable for resulting damage and costs.
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, KHLE
(i)
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.
(i) The KHLE series is a “kompakt” version of THLE series with the casing sideplates of rectangular
shape, available in settings 4 or 5, with the same performances of THLE.
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 or by the use of devices not provided by
Comefri.
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 Plenum Fan impeller description
The Comefri plenum fan series have centrifugal impeller where the air flows axially into
the wheel and is discharged radially outward.
NPL, NPL
ALU
, TE, NPE plenum fan series have backward-curved blades while the NPA,
NPA
ALU
, PEAF plenum fan 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 for the performance of the
specific plenum fan.
The features of each plenum fan series are specified in the technical catalogue that must
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