Munters MFS36 Instruction manual

Manual for use and maintenance
MFS
Air circulation fan
Models: MFS36 - MFS52
MFS
+ CE Declaration of conformity
Ag/MIT/UmGB-2085-04/13 rev1.1

© Munters AB, 2013
2
MFS
Manual for use and maintenance
Revision: No. 1 of 15.04.2013
This manual for use and maintenance is an integral part of the apparatus together with the attached technical
documentation and has been produced with reference to Directive 2006/42/EC, paragraph A, Annex II, and to
ErP Directive 2009/125/CE Commission Regulation 327/2011.
This document is destined for the user of the apparatus: it may not be reproduced in whole or in part, committed
to computer memory as a file or delivered to third parties without the prior authorisation of the assembler of the
system.
Munters Italy S.p.A. reserves the right to effect modifications to the apparatus in accordance with technical and
legal developments.

© Munters AB, 2013 3
chapter page
1. CE DECLARATION 5
1.1 Disclaimer 6
1.2 Introduction 6
1.3 Notes 6
1.4 Data for Fan Eco Design Directive 6
2. SAFETY ASPECTS 7
2.1 General 7
2.2 Points to observe 7
3. BEFORE USING 8
3.1 Delivery check 8
3.2 Packaging and transport of assembled fans 8
3.3 Structure 8
4. OPERATING CONDITIONS 9
5. INSTALLATION 10
5.1 Assembly of the fan 10
5.2 Tensioning belt adjuster 11
5.3Belt tensioner (optional) 14
5.4Tilting device 15
5.5Placement of fans 17
5.6Electrical wiring 17
6. COMMISSIONING 21
7. TECHNICAL DATA 22
7.1 Dimensions 22
7.2 Technical specification 23
7.3 Motor specifications 24
Index

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8. MAINTENANCE 25
8.1 Introduction 25
8.2 Cleaning 25
8.3 Belt tensioning check up 25
8.4 Tensioning belt adjuster 26
8.5 Replacement of V-belt 27
8.6 Fan bearing lubrication 28
8.7 Propeller replacement 28
9. SPARE PART LIST 29
10. WARRANTY 37
Index

© Munters AB, 2013 5
CE Declaration
CE DECLARATION OF CONFORMITY
(complies with Subparagraph A Annex II Directive 2006/42/EC)
Munters Italy S.p.A.
with registered offices in Strada Piani 2 – 18027 Chiusavecchia (IM) – Italy
DECLARES ON ITS OWN RESPONSIBILITY THAT THE APPARATUS
Designation Circulation fan designed for moving air to control
temperature and humidity in livestock.
Model MFS36 - MFS52
Year of manufacture 2012
CONFORMS WITH THE ESSENTIAL SAFETY REQUIREMENTS STATED
BY APPARATUS DIRECTIVE 2006/42/EC
WITH PARTICULAR REFERENCE TO THE FOLLOWING PROVISIONS:
UNI EN 953:2009, UNI EN ISO 12100:2010, UNI EN ISO 12499:2009,
UNI EN ISO 13857:2008, CEI EN 60204-1:2006 (CEI 44-5).
Chiusavecchia, 15th April 2013
Marco Scomparin
Legal representative
1.

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1.1 Disclaimer
Munters reserves the right to make alterations to specifications, quantities, dimensions etc. for production or other
reasons, subsequent to publication. The information contained herein has been prepared by qualified experts within
Munters. While we believe the information is accurate and complete, we make no warranty or representation for
any particular purposes. The information is offered in good faith and with the understanding that any use of the
units or accessories in breach of the directions and warnings in this document is at the sole discretion and risk of
the user.
1.2 Introduction
Congratulations on your excellent choice of purchasing an Euroemme®fan!
In order to realize the full benefit from this product it is important that it is installed, commissioned and operated
correctly. Before installation or using the fan, this manual should be studied carefully. It is also recommended that
it is kept safely for future reference. The manual is intended as a reference for installation, commissioning and day-
to-day operation of the Euroemme fans.
1.3 Notes
Date of release: 2012.
Munters cannot guarantee to inform users about the changes or to distribute new manuals to them.
All rights reserved. No part of this manual may be reproduced in any manner whatsoever without the expressed
written permission of Munters. The contents of this manual are subject to change without notice.
1.4 Data for Fan Eco Design Directive
According to the indication of the ErP Directive 2009/125/CE the MFS fan series as circulator fan (fanjet) are not
included in the requirements of the commission regulation 327/2011.
CE DeclarationChapter1

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2.1 General
The safety of fans is assured by Munters in compliance with the safety requirements indicated by the CE label.
Safe functioning is assured only when the installation procedure and the instructions for use have been carefully
followed. The following points must be stressed:
• proper transport procedure must be followed;
• do not remove the safety mesh guards;
• all fans installed at a height lower than 2.7 m from ground level, must be equipped by extra CE safety kits,
which can be ordered;
• if the safety mesh is not installed, the manufacturer is exonerated from all responsability and the use of the
fan is considered improper;
• the maintenance operator must be kept informed on maintenance procedures;
• do not operate the fan without the safety mesh properly installed;
• do not operate the fan without having it firmly fixed to the structure or without complying with the safety
regulations for the electrical connection;
• do not install the fan in places where there might be explosion hazards as described by EN 60079 rules;
• do not handle any material which might produce explosive powders;
• the emission of harmful particles and / or gases into the atmosphere must be within the limits determined
by local authorities;
• the fan is intended to be installed and used by qualified personnel who are familiar with relevant safety
requirements;.
• safety equipment necessary for the prevention of accidents at the mounting and operating site shall be
provided by the buyer in accordance with the regulations prevailing in the local country;
2.2 Points to observe
The fan must not be driven by impulsive voltage (frequently on/off voltage). This impulse voltage causes an
excessive build-up of heat in the motor which can lead to motor failure. The temperature of the outer casing of the
motor may be hot to the touch during normal operation.
Safety aspects 2.
The fan must only be used if it is in perfect operating condition, by personnel, aged
more than 14 years who are perfectly aware of the safety measures and possible
hazards, and in strict compliance with the instructions given in this manual.
WARNING
The fan must only be used if it is in perfect operating condition, by personnel, aged
more than 14 years who are perfectly aware of the safety measures and possible
hazards, and in strict compliance with the instructions given in this manual.
WARNING

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3.1 Delivery check
Upon receipt, inspect the fan for external damage and if found, inform the forwarding agent without delay. Check
the data on all the rating plates, especially voltage and frequency. After placing the motor in the working position
(see section 5.1), turn the propeller by hand while the fan is switched off to verify smooth rotation of the propeller.
3.2 Packaging and transport of assembled fans
The fan has a self-supporting structure in galvanised steel and it is usually delivered without packaging. Upon
request fans can be delivered packed in cardboard boxes. Fans should not be permanently stocked one upon
the other, regardless if they are delivered with or without packaging. Handling of the fans should not be done
manually as the fans have no handles or grips. Consequently one of the following alternatives should be used:
• forklift: before loading, make sure the forks are opened as much as possible to avoid bending of the fan
bottom panel;
• crane: fix two bolts in the M8 bushes situated on the sides of the fan housing and hook the lifting cable over
the bolts.
3.3 Structure
The fans consist of the following components:
• fan housing in galvanised steel without welding spots;
• propeller with four blades in stainless or galvanised steel; blades are fixed to the propeller by high-strength
pop rivets;
• motor: single-phase or three-phases; 50 or 60 Hz; B3 form; F class winding insulation, IP 55 IEC protective
class; asynchronous single-speed;
• pyramidal shape and flat meshes for protection on back and front side;
• wall/column mounting system with tilting mechanism (optional extra); to be used when the fan needs to be
mounted next to a wall or column;
• tilting mechanism with chain (optional extra); to be used when the fan needs to be suspended from the roof
of the structure.
Before using 3.
Make sure a steel cable or rope of adequate size is being used when the fan is
lifted by crane. Fan weights are shown in the technical specification table (see
section 7.2).
WARNING

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Circulation fans, such as the MFS, are products to be used to circulate the air inside a structure, thereby creating
air movement inside the structure which helps to cool animals down during hot periods.
Normal ambient temperature limits are –25°C to +50°C. Maximum altitude is 1000 m above sea level. Should
a fan be required to operate at a higher altitude, the loss in mass flow (heat removing capacity) due to lower air
density should be taken into consideration.
Operating conditions 4.

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Installation 5.
9
6
1
1
9
8
4
23
7
5
5.1 Assembly of the fans
Fans are delivered with the motor in the transport position to minimise space usage during transportation. To move
the motor to its working position, it is necessary to follow the steps indicated below.
1. Unscrew the screws holding the flat safety meshes in place and open
the safety meshes.
2. Loosen the bolt in the motor plate closest to the centre of the fan
completely and remove it.
3. Loosen the remaining bolt in the motor plate slightly, but do not
remove it.
4. Swivel the motor 90° around the remaining bolt in the motor plate
and re-insert the bolt that was removed from the motor plate and
tighten it slightly.
5. Place the V-belt over the motor pulley and then partially over the
central pulley.
6. Rotate the propeller by hand so that the V-belt gets completely into
the groove on the central pulley.
7. Push the motor away from the centre of the fan to tighten the V-belt.
See section 8.3 for establishing the correct V-belt tension.
8. Tighten the two bolts in the motor plate so that the V-belt remains in
tension.
9. Close the safety meshes, re-insert and tighten the screws.
fig.1

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5.2 Tensioning belt adjuster (only for MFS52 model)
1. Follow steps till n°3 (see section 5.1).
2. Unscrew the M6 nut from the bracket in order to remove the grub
screw. Loosen the M6x60 bolt and remove the L bracket.
3. Swivel the motor 90° around the remaining bolt in the motor plate
and re-insert the bolt that was removed from the motor plate and
tighten it slightly.
4. Reverse 90° the L bracket having the wide side placed on the
central support. Insert the M6x60 bolt trougth the L bracket and
the central support as show in the table below.
5. Start fastening the M6x60.
6. Screw again the M6 nut on the M6 grub screw leaving a small
gap between them.
7. Place the grub screw in the two holes, one located on the motor
plate and the other located on the L bracket; slide the motor plate
in order to be sure to insert the grub screw in both holes. Then
finish tightening the M6x60 bolt.
8. Place the V-belt over the motor pulley and then partially over the
central pulley.
9. Rotate the propeller by hand so that the V-belt gets completely
into the groove on the central pulley.
10. Push the motor away from the centre of the fan to tighten the
V-belt. See section 8.3 for establishing the correct V-belt tension.
InstallationChapter5
9
10
8

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11. Be sure to adjust the two M6 nuts and the grub screw, in order to
avoid any clearance of it.
12. Tighten the two bolts in the motor plate so that the V-belt remains
in tension.
fig.2
13. Close the safety meshes, re-insert and tighten the screws.
InstallationChapter5

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Holes for pulley
fig.3
Motor
[Hp]
Frequency
[Hz]
Tensioner Hole
n°
1,0 50 NO 2
1,0 60 NO 3
2,0 50 NO 1
2,0 60 NO 2
1,0 50 YES 2
1,0 60 YES 2
2,0 50 YES 1
2,0 60 YES 1
Note: be sure to adjust the grub screw in order to guarantee the correct belt tensioning, by moving the 2 nuts.
InstallationChapter5
123

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Second mark on
tensioner arm
Mark on base
5.3 Belt tensioner (optional)
1. Follow steps till n°4 (see section 5.1).
2. Install the belt tensioner in the hole to the left of the motor base (as seen from the air intake side) and tighten
the bolt by hand.
3. Install the new V-belt onto the pulleys. Start by placing the belt onto the motor pulley, then over the idler
pulley and then onto the central pulley. Once the V-belt is partially over the pulley, it might be necessary to
start rotate the propeller by hand to help pull the V-belt completely onto the pulley.
fig.4
4. To torque the belt tensioner to the proper setting place a 24mm wrench onto the 24mm hex on the tensioner.
Turn wrench counterclockwise or clockwise (depend on the fan model) until the single mark on one half of
the belt tensioner is aligned half way between marks 2 and 3 on the opposite half of the tensioner. Hold
tensioner at this setting and tighten the bolt fastening the tensioner to the motor base.
fig.5
InstallationChapter5

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Propeller
pulley Motor pulley
Idler
pulley
Belt
Straight edge
Drive alignment
1. Use a straight edge to check the alignment of the pulleys.
2. Check alignment of belt on idler pulley, it should be centered on the idler pulley. The belt tensioner’s idler
pulley is fixed in position, therefore, alignment must be obtained by adjusting the motor and propeller
pulleys.
3. If an adjustment is needed, remove the belt, then loosen the set screws in the pulleys and move them as
necessary to achieve proper alignment.
4. Remember to tighten the pulley set screws after making an adjustment.
5. Drive alignment is very important for long belt life and proper operation.
Installation now complete, reconnect power to the motor and install outlet or inlet guard.
fig.6
5.4 Tilting device
The fan (MFS36-52) can be tilted both in vertical and horizontal as indicated below:
Metal structure
fig.7
If the fan is directly fixed to a metal structure, M8
bolts - 8.8 type, should be used and screwed into
the proper threaded inserts placed on the body (2
on each side).
InstallationChapter5

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InstallationChapter5
Chain suspension
fig.8
If the fan is used as a circulator chains should be
fixed to the M8 eyebolts previously installed on the
extremity of the lateral sides by the threaded M8
bushes.
fig.9
Wall/column mounting system
fig.10
VERTICAL TILTING
1. Loosen both the bottom bolts (it is not necessary
to remove the bolts completely from the fan).
2. Tilt the fan to the desired angle.
3. Fasten the two bolts from the step 1.
fig.11
HORIZONTAL TILTING
1. Loosen side bolts (it is not necessary to remove
the bolts completely from the support).
2. Tilt the fan to the desired angle.
3. Fasten the bolts from the step 1.
30° 30°
1
2
1
2

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5.5 Placement of fans
fig.12
fig.13
5.6 Electrical wiring
The fan is delivered without an electrical control box, but the fan motor comes already wired. Connection to the
power supply must be done by means of a thermal overload protection switch, whose size depends on motor
power. For safety reasons the overload switch can be locked by a padlock, not supplied by Munters.
In order to comply with CE regulations, fans should be mounted so that the bottom
of the fan is 2.7m or higher from the floor below it. If the fan is to be installed
at a lower height it should be equipped with special safety meshes which are
available as an optional extra.
NOTE
If the MFS is installed near a wall or similar obstacle, a free space at least of
1,500mm should be left open on the fan air intake side.
NOTE
InstallationChapter5
min. distance = 1,500m
!
!

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3 x 400V
or
3 x 230V
1 x 230V
The installer must provide a suitable control box in compliance with requirements specified by EN 60204 rules.
Electrical earthing must be carried out according to local regulations before the motor is connected to the supply
voltage.
fig.14
Below are suggested wiring diagrams for connecting the fan to the mains electrical supply. These diagrams are
however subject to local laws and regulations and should be modified if necessary to comply with such laws and
regulations.
fig.15
fig.16
= Overload protection switch
= Circuit breaker
= Fan motor
1
2
3
InstallationChapter5
Main electrical
enclosure
Main electrical
supply
Local motor
starter near fan
Fan

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To avoid excessive voltage drop, which can be harmful to electrical motors, care must be taken as to the thickness
of cables used as well as the distance (D) from the main electrical enclosure to the motor. In the Table below are
the maximum allowable distances.
Motor Phases Frequency
[Hz]
Voltage
[V]
Speed Current
[A]
Cross selectional area of cable
1.5mm22.5mm24mm2
Maximum allowable lenght: D [m]
2.0hp/
1.5kW
3
3
50/60
50/60
230
400
single
single
6.1
3.5
50
90
90
150
140
240
1.0hp/
0.75kW
1
1
3
3
50
60
50/60
50/60
200-230
208-230
230
400
single/multi
single
single/multi
single/multi
5.2
5.6
4.3-3.8
2.5-2.2
60
50
90
280
100
90
150
460
160
140
240
730
0.75hp/
0.55kW
1
1
3
3
3
3
50
60
50/60
50/60
50/60
50/60
200-230
208-230
230
400
230
400
single/multi
single
single
single
multi
multi
4.5
4.4
2.8
1.6
2.9-2.4
1.65-1.4
80
70
110
350
80
260
130
120
190
580
140
440
210
190
300
920
220
700
0.5hp/
0.37kW
1
1
3
3
3
3
50
60
50/60
50/60
50/60
50/60
200-230
208-230
230
400
230
400
single/multi
single
single
single
multi
multi
3.0
2.9
2.3
1.3
2.4-1.9
1.4-1.1
100
90
140
430
100
320
170
160
230
710
170
540
280
250
360
1,130
280
860
Standard fan motors have the following voltage and frequency:
230/400V three-phase 50 or 60 Hz.
Failure to operate the fan with an overload protection device will render the
motor guarantee null and void. Such motor overload protection devices can be
ordered from Munters and be supplied with the fans.
NOTE
The connection cable must be completely extracted from the fan housing in order
to avoid being damaged by moving parts.
WARNING
!
InstallationChapter5

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fig.17
Motor specifications are written on the label stuck
on the frame and motor (No. 1 and 2 in diagram).
Before operating the fan, make sure the motor turns
as shown by the arrow on the central pulley (No.
3 in diagram). To change the direction of rotation
of a three-phase motor it is necessary to change the
connection of two of the phases.
InstallationChapter5