Logiudice Forni LFE User guide

INSTRUCTION MANUAL
FOR INSTALLATION,
MAINTENANCE
AND USE
OF AN ELECTRIC BAKING OVEN
MODEL LFE

LOGIUDICE FORNI S.r.l.
Via Chiesa 19 37040 Volpino di S. Stefano di Zimella - VERONA –
Tel. [phone] / 490112 Fax. [phone]
E-mail : logiudicexpo[email protected] ;
[e-mail] http://www.logiudiceforni.com

page
Chapter Title Page
Introduction 5
1 Part 1: Warning and general advice 7
1.1 General warnings 7
1.1.1 Manufacturer's responsibilities 7
1.1.2 Buyer's responsibilities 7
1.2 Instructions for transport - loading and unloading operations 8
1.3 Disposal of the packing material and of the oven at the end of its life-span 8
1.4 Oven CE marking and Serial number 9
1.5 Technical features 10
1.5.1 Technical description 12
1.6 Legal prescriptions, technical rules and directives 13
1.7 Specific arrangements for the installation site 13
1.8 Characteristics of connections 13
1.8.1 Electric connection 13
1.8.2 Connection to the water main 14
1.8.3 Steam discharge system 14
1.8.4 Steam trap 14
2 Part 2: Oven assembly and installation 15
2.1 Positioning the oven 15
2.2 Installation 15
2.2.1 Electric connection 15
2.2.1.1 Equipotential 17
2.2.2 Other connections 17
2.3 Inspection and start-up 17
2.4 Scheduled maintenance 18
2.4.1 Cleaning the steam generators 18
2.4.2 Cleaning the solenoid valves 20
2.5 Troubleshooting 21
3 Part 3: Use and routine maintenance 22
3.1 General warnings 22
3.1.1 Safety instructions 22
3.1.2 Safety devices 23
3.2 Start-up and switch-off 24
3.2.1 Control panel 24
3.2.2 Start-up 25
3.2.3 Switching off 25
3.3 Cleaning and care 25
3.3.1 Cleaning the doors 26
3.3.2 Cleaning the steam trap 26

DECK OVEN LFE
Table of contents 449
Chapter Title Page
3.4 Safety precautions in case of prolonged inactivity 26
3.5 Safety precautions in case of malfunctions 27
4 Part 4: Technical drawings 28

DECK OVEN LFE
Table of contents 549
Introduction
The layout of this instruction manual was designed for easy and rapid consultation.
There are illustrated diagrams with clear, comprehensive written explanations.
This manual has been divided into chapters for easy consultation by the end-user.
The information contained in this manual concerns the use of this machine and cannot be used for
other purposes.
The company reserves all property rights on this manual, therefore any form of reproduction or
disclosure of its contents without prior authorization is prohibited.
The Company reserves the right to modify the contents of this manual at any time without prior
notice.
For a proper and safe use of the oven, it is absolutely necessary to follow the instructions outlined in
this manual - not only for the installation site of the machine but also for its use and maintenance
operations on the equipment.
The Company reserves the rights to modify the oven and its instruction manual at any time without
undertaking to update products and/or manuals of the previous productions.
Nevertheless, the Company is willing to supply all technical clarifications to end-users needing
assistance and will be pleased to accept advice, proposals and suggestions of any kind with the aim
of improving the final quality of the product.

DECK OVEN LFE
Table of contents 649
This page has been intentionally left blank

DECK OVEN LFE
Table of contents 749
Part 1: WARNING AND GENERAL ADVICE
1.1 GENERAL WARNINGS
Before starting any operation on the oven, carefully read the warnings outlined herein: they provide
important guidelines for the operator's safety as well as that of the equipment during normal and
maintenance operations.
This manual must be considered as an integral part of the oven and must therefore be kept for all
future references until its complete disposal.
Keep this document in a dry place protected from the sunlight and dust and possibly in the vicinity of
the oven.
These appliances must only be used by personnel specifically trained for their use.
Operations must be carried out under surveillance.
This equipment must only be used for the purposes for which it was explicitly designed, any other
use is considered as improper and therefore dangerous.
During operations, the external surfaces of the equipment can become very hot, be very careful!
Deactivate the equipment in case of faulty or bad working order.
For repairs or maintenance operations, contact one of the authorized Assistance Centres.
All the relevant information on the equipment is reported on the rating plate (see paragraph "Oven
CE marking") and must be referred to when technical assistance is requested.
Should technical assistance be required, it is important to describe the defect in detail so as to allow
the technician to immediately understand the cause and type of fault.
During installation and maintenance operations we recommend that the operator wears gloves to
protect his hands.
Warning! All safety fire-extinguishing prescriptions must be rigorously followed.
1.1.1 MANUFACTURER'S RESPONSIBILITIES
The manufacturer is liable for any constructional defects according to the law in force.
The guarantee period starts from the date of the delivery note.
The manufacturer declines any responsibility for damages arising from the non-observance of the
precautions outlined in this manual during the use of the oven or from repairs or maintenance
operations carried out by unauthorized personnel.
The manufacturer's responsibility declines also in case of improper use of the oven.
1.1.2 BUYER'S RESPONSIBILITIES
The buyer must guarantee an installation site that conforms with the manufacturer's prescriptions
and be adequate for the equipment to work properly.
All work carried out on electric, water and draining systems are at customer's charge.
These systems must be adequately dimensioned for the chosen equipment.

DECK OVEN LFE
Table of contents 849
1.2 INSTRUCTIONS FOR TRANSPORT - LOADING AND UNLOADING OPERATIONS
The oven is made up of a series of parts to assemble on site, therefore its loading and unloading
operations to/from the means of transport can be carried out through a fork lift truck or a rope of load-
carrying capacity adequate to the part being handled.
Warning! Lifting apparatus and ropes must be adequately selected according to
the weight of the part to be lifted.
1.3 DISPOSAL OF THE PACKING MATERIAL AND OF THE OVEN AT THE END OF
ITS LIFE-SPAN
Packing materials should not be thrown away but recycled and disposed of as directed by local
authorities.
Dismantling and possible complete disposal of the oven should be carried out by a company
specifically authorized for waste disposal.
This company will assume responsibility for the disposal of the various types of material such as
metals of different nature, mineral fibres, glass and so on, sending them to the most appropriate final
destination.
HANDLING OPERATIONS WITH CRANE HANDLING OPERATIONS WITH FORK LIFT TRUCK

DECK OVEN LFE
Table of contents 949
1.4 OVEN CE MARKING AND SERIAL NUMBER
Every oven is equipped with a rating plate reporting all the information necessary for identification,
and main technical data.
The rating plate, consisting of an adhesive aluminium film, is always located inside the steam
generator compartment at the right-hand side. It is visible after its covering removal. This covering is
not secured with screws and can be removed by simply lifting and pulling.

DECK OVEN LFE
Table of contents 1049
1.5 TECHNICAL FEATURES
Modello N. sportelli per
camera Superficie di cottura Altezza
Model N. of doors for
each chamber Baking surface Oven height
A
B
C
D
H
Camere
Econ.
Vapor.
m
2
cm cm cm cm cm Kw Kw Kw
LFE 3212 4,50 120 250 24 12 5,7
LFE 3216 6,00 160 290 29 15 7,5
LFE 3220 7,45 200 330 37 19 9,0
LFE 3224 8,95 240 370 43 22 10,5
LFE 3316 8,95 160 290 39 20 7,5
LFE 3320 11,20 200 330 49 25 9,0
LFE 3324 13,40 240 370 57 29 10,5
LFE 3416 11,95 160 290 48 24 7,5
LFE 3420 14,90 200 330 61 31 9,0
LFE 3424 17,90 240 370 71 36 10,5
LFE 4212 6,00 120 250 31 16 7,6
LFE 4216 7,95 160 290 39 20 10,0
LFE 4220 9,95 200 330 49 25 12,0
LFE 4224 11,95 240 370 57 29 14,0
LFE 4316 11,95 160 290 51 26 10,0
LFE 4320 14,90 200 330 65 33 12,0
LFE 4324 17,90 240 370 75 38 14,0
LFE 4416 15,90 160 290 64 32 10,0
LFE 4420 19,85 200 330 81 41 12,0
LFE 4424 23,85 240 370 94 47 14,0
LFE 5212 7,45 120 250 39 20 9,5
LFE 5216 9,95 160 290 49 25 12,5
LFE 5220 12,40 200 330 61 31 15,0
LFE 5224 14,90 240 370 71 36 17,5
LFE 5316 14,90 160 290 64 32 12,5
LFE 5320 18,60 200 330 81 41 15,0
LFE 5324 22,35 240 370 94 47 17,5
2303 / 620 186 242
4 / 620 248 304 230
242 230
FORNO A3 CAMERE •
••
•3 CHAMBERS OVEN •
••
•BACKOFEN MIT 3 BACKRÄUME •
••
•FOUR A3 CHAMBRES
1863 / 620
Modelo N. ventanillas
por cámara
Superficie
de cocción Medidas cámara de cocción
potenza elettrica
Dimensioni esterneDimensioni camere
LFE - FORNO ELETTRICO
Modèle N. portes par
chambre
Surface de
cuisson Dimensions chambres de cuisson
Altura
Electric power
Puissance èlectrique
Potencia Elèctrica
Hauteur
Dimensions of the
baking chambers Outside oven dimensions
Medidas extérnas
Dimensions externes
du four
FORNO A4 CAMERE •
••
•4 CHAMBERS OVEN •
••
•BACKOFEN MIT 4 BACKRÄUME •
••
•FOUR A4 CHAMBRES
FORNO A5 CAMERE •
••
•5 CHAMBERS OVEN •
••
•BACKOFEN MIT 5 BACKRÄUME •
••
•FOUR A5 CHAMBRES
124
3 / 620 186 242 230
2 / 620 124 180 230
2 / 620
2 / 620
4 / 620
230
230180
124 180
248 304 230
A
B
C
D
H
Camere
Econ.
Vapor.
m
2
cm cm cm cm cm Kw Kw Kw
LFE 3216/76 7,30 160 290 29 15 7,5
LFE 3220/76 9,15 200 330 37 19 9,0
LFE 3224/76 10,95 240 370 43 22 10,5
LFE 3316/76 10,95 160 290 39 20 7,5
LFE 3320/76 13,70 200 330 49 25 9,0
LFE 3324/76 16,45 240 370 57 29 10,5
LFE 4216/76 9,75 160 290 39 20 10,0
LFE 4220/76 12,20 200 330 49 25 12,0
LFE 4224/76 14,60 240 370 57 29 14,0
LFE 4316/76 14,60 160 290 51 26 10,0
LFE 4320/76 18,25 200 330 65 33 12,0
LFE 4324/76 21,90 240 370 75 38 14,0
3 / 760 228 284 230
2 / 760 152 208 230
3 / 760 228 284 230
2 / 760 152 208 230
FORNO A4 CAMERE •
••
•4 CHAMBERS OVEN •
••
•BACKOFEN MIT 4 BACKRÄUME •
••
•FOUR A4 CHAMBRES
FORNO A3 CAMERE •
••
•3 CHAMBERS OVEN •
••
•BACKOFEN MIT 3 BACKRÄUME •
••
•FOUR A3 CHAMBRES

DECK OVEN LFE
Table of contents 1149
Modello N. sportelli per
camera Superficie di cottura Altezza
Model N. of doors for
each chamber Baking surface Oven height
A
B
C
D
H
Camere
Econ.
Vapor.
m
2
cm cm cm cm cm Kw Kw Kw
LFE 3112 3,00 120
235
16 8
3,0
LFE 3116 3,95 160 275 20 10 3,9
LFE 3120 4,95 200 315 25 13 4,5
LFE 3124 5,95 240 355 29 15 5,4
LFE 4112 3,95 120 235 21 11 4,0
LFE 4116 5,25 160 275 27 14 5,2
LFE 4120 6,60 200 315 33 17 6,0
LFE 4124 7,90 240 355 39 20 7,2
LFE 5112 4,95 120 235 26 13 5,0
LFE 5116 6,60 160 275 33 17 6,5
LFE 5120 8,20 200 315 41 21 7,5
LFE 5124 9,85 240 355 48 24 9,0
FORNO A5 CAMERE •
••
•5 CHAMBERS OVEN •
••
•BACKOFEN MIT 5 BACKRÄUME •
••
•FOUR A5 CHAMBRES
1 / 820 82 130 230
FORNO A4 CAMERE •
••
•4 CHAMBERS OVEN •
••
•BACKOFEN MIT 4 BACKRÄUME •
••
•FOUR A4 CHAMBRES
1 / 820 82 130 230
FORNO A3 CAMERE •
••
•3 CHAMBERS OVEN •
••
•BACKOFEN MIT 3 BACKRÄUME •
••
•FOUR A3 CHAMBRES
1 / 820 82 130 230
Medidas extérnas Altura Potencia Elèctrica
Modelo N. ventanillas
por cámara
Superficie
de cocción Medidas cámara de cocción
Dimensions of the
baking chambers Outside oven dimensions Electric power
Modèle N. portes par
chambre
Surface de
cuisson Dimensions chambres de cuisson Dimensions externes du four Hauteur Puissance èlectrique
LFE - FORNO ELETTRICO
Dimensioni camere Dimensioni esterne
potenza elettrica
3-DECK OVEN LFE

DECK OVEN LFE
Table of contents 1249
1.5.1 TECHNICAL DESCRIPTION
MAIN CHARACTERISTICS:
The electric baking oven is equipped with a series of heating elements adequately shaped
and located so as to warm up both ceiling and base deck of the baking decks. Heating
elements are connected and maintained frontally with respect to the oven. This allows the
oven to be installed even in narrow spaces.
STEAM GENERATORS:
Are located in the zone underneath the baking decks. They are designed to ensure a
considerable thermal flywheel and a high supply of steam without water dragging.
ACCESS TO THE BAKING DECKS:
Via multiple doors made of Pyrex tempered glass and counterbalanced.
BAKING DECKS OR "BASE DECKS":
Made from a special refractory cement mix and proper frame to ensure higher resistance and
flexibility.
FRONT STRUCTURE:
Made entirely in stainless steel AISI type 304
INSULATION:
The insulating jacket is made with very thick panels in rock wool to avoid detrimental heat
losses.
ELECTRIC INSTALLATION:
The electric installation conforms with the regulations currently in force within the European
Community.
SAFETY DEVICES:
Every deck of the oven is equipped with a relay system able to detect any phase absence in
the power supply and cutting off the supply to the heating elements.

DECK OVEN LFE
Table of contents 1349
1.6 LEGAL PRESCRIPTIONS, TECHNICAL RULES AND DIRECTIVES
During operation and installation and first start-up especially, the following legal prescriptions must
be followed:
- law provisions in force;
- rules of hygiene/health related to cooking environments;
- municipal and/or territorial building code and fire-extinguishing prescriptions;
- legal prescriptions on accident prevention in force;
- provisions of law set by the Electrical Engineers committee on electrical safety;
- prescriptions set by the authority supplying electric energy;
- possible prescriptions set by the water mains authority;
- any other local legal prescriptions.
1.7 SPECIFIC ARRANGEMENTS FOR THE INSTALLATION SITE
Due to the characteristics of this apparatus, it is very important to install it in a well ventilated
environment and that it is equipped with all the safety openings prescribed for its power.
Therefore the installation site must have:
- a level floor,
- a steam ducting system (independent from that of other apparatus, if present in the
installation site),
- a water connection point,
- an electric outlet, of the appropriate dimensions,
- an exhaust pipe, a sump or any other system to allow an air shift.
1.8 CHARACTERISTICS OF CONNECTIONS
Warning! : All the cocks and switches which intercept supply from the mains and disconnect the
equipment from the distribution networks must be located in well visible and
accessible areas!
1.8.1 ELECTRIC CONNECTION
The electrical equipment in the oven destination site must conform to the legal prescriptions set by
the laws in force. It must be adequately dimensioned according to the oven characteristics reported
on the plate, have an efficient ground conductor and an omnipolar disconnector between the
equipment and the distribution network -installed with a distance of at least 3mm between the poles-
and a differential gear with characteristics adequate to the nominal power of the appliance (1mA per
kW power).
The oven must be enclosed in an equipotential system Connect using the clamp provided in the
electric panel, marked out by the International symbol and a conductor having half the nominal
section of the power supply phases (for nominal sections > 16mm
2
). These are the sections in detail:
For power supply with 25 mm
2
of section use a 16 mm
2
earth wire; For power supply with 35 mm
2
of
section use a 25 mm
2
earth wire; For power supply with 50 mm
2
of section use a 25 mm
2
earth
wire. This connection is effected between all the installed appliances and the earthing system of the
work place.
Voltage and absorption are indicated on the rating plate.
the person responsible for installation must provide a regular declaration of conformity of the
installation. It is good practice to keep this declaration in a clean and safe place.

DECK OVEN LFE
Table of contents 1449
1.8.2 CONNECTION TO THE WATER MAINS
The water distribution network in the oven destination site must conform to the legal prescriptions set
by the laws in force. The terminal assigned to the oven connection must be equipped with an
approved fast-closing shut-off cock. Water pressure in the mains supply must stay within 50 and 300
kPa (between 0.5 and 3 bars). If this is not the case install a pressure reducer (it is recommended to
install it anyway, even if pressure is within the allowed limits). Consult the technical drawing of every
single model to see the exact location of the ½” connector. The water system must also be correctly
installed using only materials suitable for drinking water.
Should pressure in the water system exceed 3 bars (300kPa) an excess of steam in the
backing deck would result and cause unhooking of the door from the oven throat and the
consequent breakage of the glass. If this is the case, there are three ways to eliminate the
problem:
1) Reduce water intake pressure to the steam generator by inserting a pressure
reducer before the oven (recommended).
2) Decrease the time to intake water into the steam generator.
3) Decrease the working temperature of the steam generator.
The person responsible for installation must provide a regular declaration of conformity of the
installation. It is good practice to keep this declaration in a clean and safe place.
1.8.3 STEAM DISCHARGE SYSTEM
The steam after being discharged from the backing deck is released into the atmosphere through a
dedicated draining channel with a diameter of 150 – 200mm. The steam discharge duct must be
installed on the aspirator forcing breast.
A condensate collector equipped with drain pipe must be arranged at the base of each ascending
section of the steam discharge duct. This condensate collector must be equipped with an adequate
opening for inspection and cleaning operations.
Note: For steam discharge ducts construction the use of material in stainless steel is recommended.
To allow good draught, the chimney breast must be at least one metre higher than roof ridges,
balustrades or any other possible obstacle or structure located within 10 metres.

DECK OVEN LFE
Table of contents 1649
Insert the cable through the appropriate cord flap. Accurately connect the conductors in the
corresponding clamps to the terminal board. The earthing conductor must be longer than the other
conductors, so that this will be the last to detach should the cable be strongly pulled or should the
cord flap break. Clamp the cord flap.
Pos. Description Pos. Description
1 Equipotential Point 2 Terminal board
3 Panel ventilator fuse 4 Lights fuse
5 Fuses of the heating elements deck
2 6 Fuses of the heating elements deck 1
7 Transformer's secondary fuse 8 Transformer's main fuse
9 Fuses of the heating elements deck
3 10 Fuses of the heating elements deck 4
11 Heating element relays for ceiling of
deck 1 12 Heating element relays for base of deck 1
13 Heating element relays for ceiling of
deck 3 14 Heating element relays for base of deck 3
15 Electromagnetic switch for steam
generator of deck 1 16 Electromagnetic switch for steam generator of deck 2
17 Electromagnetic switch for steam
generator of deck 3 18 Electromagnetic switch for steam generator of deck 4
19 Light relay deck 1 20 Light relay deck 2
21 Light relay deck 3 22 Light relay deck 4
23 Transformer of power supply to
boards 24 Transformer of power supply to the panel
25 Heating element relays for ceiling of
deck 4 26 Heating element relays for base of deck 4
27 Heating element relays for ceiling of
deck 2 28 Heating element relays for base of deck 2
29 Safety relay of deck 3 30 Safety relay of deck 4

DECK OVEN LFE
Table of contents 1849
2.2.2 OTHER CONNECTIONS
Effect the connections correctly.
To the water supply network (see also paragraphs 1.8.3).
of the steam discharge system (see also paragraphs 1.8.2)
2.3 INSPECTION AND START-UP
Warning! The final inspection and first start-up must be effected by the technicians of the
manufacturing company and the technicians authorized by the manufacturer of the
burner.
Before proceeding to the start-up, the following84( )271.32101(3.3227(c)-0.30270u)12.1957u68(e)1.311(a)1.322330270uurI  t(.)-4.77779( )]TJ-7260.5773(t)-4.77753(n)t32034( )-1.32034(c)-4.77753(n).32101(8[( )-1647.06(T)0.5773(t)-44(r)-40.5773(t819(e)1.32101(c)-0.29872(t)-4.77819(i)4.)2.1971(g)1.32101( )-19787(t)-44(:34(c)-4.77753(n).32101(.)-2.16558(3)5.67529(25485y )]TJ-7260d[(b)1.32101(u)1.3210561(u)1.321056818(o)1056818(o)1056818(o)105n)1.3210561(u)1.32105d3.t)-4.77687(a)1.31968(0270u)12.1957u68(e)1.311(a)1.3222101(e)1.321687(a)1.31321056818(o)1056818c


DECK OVEN LFE
Table of contents 1949
1) Detach the rubber tube from the joint’s rubber hose adaptor. (Pos. 8).
2) Remove the flange (Pos. 10) by unscrewing the nuts of the sprayer, then extract the tube (probe)
(Pos. 11).
3) Effect a complete descaling of the sprayer especially in the holes where water is discharged, by
using a rigid iron wire bar or else a 5 mm drill bit. Clean the internal part of the tube extremely
well by using descaling products, or even with an extended 10 mm widia drill bit.
Whenever necessary, replace the parts completely.
4) N.B. Before inserting the probe in place, we recommend an internal and external cleaning with
running water.
5) It is recommended to place good rubber gaskets in the joints previously dismantled (if necessary,
with the assistance of a plumber), pay attention also to the correct positioning of the joints
interposed between the two flanges of the sprayer (Pos. 7).
6) If the gaskets of the flanges are too rigid, their replacement is recommended (Pos. 7).
POSITION DESCRIPTION
1 Steam generators box
2 Gasket in mineral fiber
3 M8x25 screw made in steel
4 Main flange of the steam generator
5 Washer M8 for fixing the main flange of the steam
generator
6 Nut M8 made in brass for fixing the main flange of the
steam generator
7 Small gasket
8 Connection for H2O inlet
9 Three-phase heater
10 Sprayer flange
11 Sprayer
12 Probe carrier of the probe for steam generator control
13 Condensate drain connector
14 Fixed flange of the steam generators

DECK OVEN LFE
Table of contents 2049
1
13
12
11
10
2
3
4
5
6
7
8
9
14