Dufour 335 Grand Large User manual

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OWNER’S MANUAL
YACHT DESIGN CATEGORY A
IN ACCORDANCE WITH EUROPEAN DIRECTIVE 94/25/CE
AS AMENDED BY EUROPEAN DIRECTIVE 2003/44/CE

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Your contact:
Name
is the representative for DUFOUR YACHTS and will provide you with all the help necessary to solve
any problems which you might have at the time of launch and masting, as well as for the start-up and
maintenance inspections for your boat. If necessary, they will help you with the administrative process of
registering your boat.
As soon as you become the owner, familiarise yourself with the manual supplied with your boat, sign and
date the receipt acknowledgements below, and give (or send) the last one to your agent.
Owner's Manual receipt acknowledgement to be kept in your Manual
I, the undersigned:
Name
Address
owner of the DUFOUR 335 n°
confirms having received the Owner's manual of the DUFOUR 335 and having accepted it
in English.
Dated:
Signature:
Detach along dotted line
…………………………………………………………………………………………………………………
Owner’s Manual receipt acknowledgement to be returned to DUFOUR YACHTS
1, Rue Blaise Pascal- 17187 PERIGNY CEDEX- FRANCE
I, the undersigned:
Name
Address
owner of the DUFOUR 335 n°
confirms having received the Owner's manual of the DUFOUR 335 and having accepted it
in English.
Dated:
Signature:

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CONTENTS
INTRODUCTION ........................................................................................................................................................7
I. GENERAL INFORMATION............................................................................................................................8
Design category____________________________________________________________________________8
Certification ______________________________________________________________________________8
Identification______________________________________________________________________________8
Builder's plate_____________________________________________________________________________9
Degrees of danger__________________________________________________________________________9
II. PRINCIPAL SPECIFICATIONS...................................................................................................................10
III. ELECTRICAL SYSTEMS...................................................................................................................................11
Safety and operating instructions for the electrical system _______________________________________11
Installing new equipment___________________________________________________________________ 11
Batteries_________________________________________________________________________________ 12
Electric windlass__________________________________________________________________________12
220 Volts /110 Volts installation (ISO 13297: 2000) _____________________________________________13
IV. GAS INSTALLATION.........................................................................................................................................14
Operating advice__________________________________________________________________________14
Checking the gas circuit (ISO 10239: 2000)____________________________________________________15
Changing the gas cylinder __________________________________________________________________15
V. DRAIN & SANITATION SYSTEM......................................................................................................................16
Characteristic of the exhaust system (ISO 15083: 2003)__________________________________________ 16
Pressurized fresh-water pump ______________________________________________________________16
Seacocks_________________________________________________________________________________17
Operation of sea toilets_____________________________________________________________________17
Operation of the holding tank (ISO 8099: 2000) ________________________________________________17
VI. FLOODING .........................................................................................................................................................18
VII. FIRE PROTECTION.........................................................................................................................................18
Installation ______________________________________________________________________________18
Safety instructions ________________________________________________________________________19
VIII. ENGINE............................................................................................................................................................20
General precautions_______________________________________________________________________20
Exhaust gas emission ______________________________________________________________________20
Safety 20
Wintering _______________________________________________________________________________21
IX. FUEL INSTALLATION......................................................................................................................................21
X. STEERING SYSTEM............................................................................................................................................21
Helm 21
Emergency tiller __________________________________________________________________________22
XI. SAILING ..............................................................................................................................................................22
XII. PROTECTION AGAINST LIGHTNING..........................................................................................................23
Maintenance _____________________________________________________________________________ 23
Protection of persons during a storm _________________________________________________________23
XIII. ENVIRONMENTAL PROTECTION & SAFETY ..........................................................................................23
XIV. SAFETY FACILITIES......................................................................................................................................24
XV. HANDLING, TRANSPORTING, HAULOUT...................................................................................................24
XVI. GUARANTEE, TRANSFER OF OWNERSHIP..............................................................................................27
1. Presentation plan.............................................................................................................................................32
2. Accommodation layout....................................................................................................................................33
3. Deck fittings plan.............................................................................................................................................34
4. Sail plan ...........................................................................................................................................................36
5. Halyard and sheet operating diagram.............................................................................................................38
6. 220 V circuit diagram......................................................................................................................................40

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7. 220 V electrical installation diagram..............................................................................................................42
8. Fuse location diagram..................................................................................................................................... 44
9. Charging and power system diagram .............................................................................................................46
10. 12 V distribution panel diagram ..................................................................................................................... 48
11. Terminal block diagram..................................................................................................................................50
12. 12 V electrical installation diagram................................................................................................................ 52
13. Rudder system diagram...................................................................................................................................54
14. Gas system diagram.........................................................................................................................................56
15. Abandon ship plan ..........................................................................................................................................58
16. Fresh-water system diagram........................................................................................................................... 60
17. Drain system diagram ..................................................................................................................................... 62
18. Skin fitting location diagram .......................................................................................................................... 64
19. Mechanical installation diagram.................................................................................................................... 66
20. Holding tank installation diagram..................................................................................................................68
21. Lifting diagram................................................................................................................................................70

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I
IN NT TR RO OD DU UC CT TI IO ON N
DUFOUR YACHTS is pleased to present you with this manual which will help you to get to know your
boat better.
This Manual has been produced to help you use your boat safely and enjoyably. It contains details
of the boat, the equipment supplied or fitted, its systems and information about their use. Read it
carefully and familiarize yourself with the boat before using it.
This Owner’s Manual is not a course in sailing safety or seamanship. If this is your first boat, or you
are changing to a type of boat you are unfamiliar with, for your convenience and safety, make sure you gain
experience handling and using it before taking command. Your agent, your national sailing or cruising
federation or your yacht club will be happy to give you information about sailing schools or
qualified instructors in your area.
Ensure that forecast wind and sea conditions correspond to the design category of your boat, and that you
and your crew are capable of handling the boat in these conditions. Even when your boat is suitable for
them, the sea and wind conditions corresponding to design categories A, B, and C vary from severe storm
for category A to severe conditions for the top end of category C, subject to dangers of abnormal gusts or
waves; these are dangerous conditions in which only an experienced, trained crew in good condition, sailing
a properly-maintained boat, can sail in a satisfactory manner.
This Owner's Manual is not a detailed maintenance or repair guide. In the event of problems, consult the
boat builder or their representative. If a maintenance manual is provided, be sure to use it.
Always employ the services of an experienced professional for maintenance, fitting accessories, or
modifications. Modifications that could affect the characteristics of the boat must be assessed,
performed and documented by qualified personnel. The boat builder cannot be held responsible for
modifications made without their approval.
In certain countries, a skipper’s license or authorization are required, or special regulations are in
force.
Always maintain your boat correctly and make allowance for deterioration due to age or resulting, where
applicable, from heavy or unsuitable use. Any boat, however sturdy it is, can be severely damaged if
it is used incorrectly. This is incompatible with safe sailing. Always suit your speed and heading to
the prevailing sea conditions.
If your boat is equipped with a life-raft, read its instruction manual carefully. The crew must have on
board all the safety equipment (life-jackets, harnesses, etc.) corresponding to the type of boat, weather
conditions, etc. In some countries, this equipment is mandatory. The crew must be familiarized with the use
of all the safety equipment and with emergency safety procedures (man overboard recovery, towing, etc.);
training sessions are regularly organized by sailing schools and clubs.
It is recommended that all persons wear appropriate buoyancy aids (life-jackets, personal flotation devices)
when on deck. It should be noted that in certain countries, it is compulsory to wear a buoyancy aid
(complying with national regulations) at all times.
KEEP THIS MANUAL IN A SAFE PLACE AND PASS IT ON TO THE NEW OWNER IF YOU
SELL THE BOAT.
WARNING: Our boats are regularly improved in the light of our customers’ experiences and researched
by the shipyard, and so the specifications given in this Owner’s Manual are not contractually binding and
may be changed without notice and without any obligation to update. This manual is intended to cover as
much information as possible, so certain equipment or paragraphs might not apply to your boat. In case
of doubt, please refer to the inventory which should have been given to you by your agent when you
placed your order.

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I
I. . G GE EN NE ER RA AL L I IN NF FO OR RM MA AT TI IO ON N
Design category
Your DUFOUR 335 is in the OCEAN-GOING category (category A).
Under normal conditions of use, your boat is designed to sail in waves significantly higher than 4 m and
winds of force 8 or higher on the Beaufort scale, and to withstand even more severe conditions.
This sailing capability is equally dependent on the skills of the crew, their physical capacities, the
maintenance of the boat and its equipment.
So always take care before putting to sea.
DUFOUR YACHTS cannot guarantee the perfect operation of the boat in exceptional sea conditions
(violent storms, hurricanes, cyclones, waterspouts, etc)
SUMMARY OF DESIGN CATEGORIES
Always check the weather forecast before taking to sea: take to the sea, don't take risks!
In port: every day, the harbour office posts weather bulletins and forecasts for the coming days.
Météo France on 0836 68 08 08
Navifax - direct on 0836 70 18 52
VHF: CROSS transmit several bulletins per day, preceded by an announcement on Channel 16.
Certification
DUFOUR YACHTS has chosen the French Institute for Certification and Standardisation (icnn.fr) for Water
sports as the approved body to ensure the conformity of your boat with the European Directive EC 94/25,
module B.
Identification
The hull identification number is located on starboard side of transom. It contains a series of letters and
numbers that begin with FR-DUF...
Design
category
Type of sailing
Wind strength
(Beaufort)
Wind
speed
Effective wave height
to be taken into
account
A
Ocean-going
Superior to 8
Up to 28 m/s
Higher than 4 m
B
Open sea
Up to and including
Force 8
Up to 21m/s
Up to and including
4 m
C
Inshore
Up to and including
Force 6
Up to 17 m/s
Up to and including
2 m
D
In sheltered waters
Up to and including
Force 4
Up to 13 m/s
Up to and
including 0.5 m

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Builder's plate
Design category = A: Ocean-going (see 1.1)
Maximum number of people:
category A = 6
category B = 8
category C = 10
category D = 10
WARNING
Do not exceed the maximum recommended number of people. However many people there are
aboard, the total weight of the people and equipment must never exceed the maximum
recommended loading.
Maximum load recommended:
category A = 1250 kg
category B = 1410 kg
category C = 1480 kg
category D = 1430 kg
WARNING
When loading the boat, never exceed the recommended maximum load. Always load the boat
carefully and distribute the weight in a suitable manner in order to maintain the theoretical trim
(approximately horizontal). Avoid placing heavy loads high up.
CE 0607
Degrees of danger
DANGER
Indicates an extreme intrinsic risk that presents a high probability of
death or permanent injury if proper precautions are not taken.
WARNING
Indicates a risk that presents a high probability of death or permanent
injury if proper precautions are not taken.
NOTE
Indicates a reminder of safety practices or draws attention to
dangerous practices that could result in personal injury or damage to
the boat, its components or the environment.
: recommended by the builder for navigation in sea
conditions for category for which it was built.
: CE mark indicating that the boat complies with all the
requirements of the Directive. : The sequence of numbers is
the Certification institution's code. In this case, ICNN
(Institut pour la Certification et la Normalisation dans le
Nautisme), (refer also to: Safety Compliance Declaration)
Part of this information is given on the builder’s plate
attached to the boat. A full explanation of this information
is given in the chapter that follows.
: recommended by the manufacturer including the weight
of all persons aboard, provisions and personal belongings,
and all equipment not included in the boat’s light
displacement, excluding the contents of the tanks.

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I
II I. . P PR RI IN NC CI IP PA AL L S SP PE EC CI IF FI IC CA AT TI IO ON NS S
Model:
DUFOUR 335 Grand Large
Designer:
Umberto Felci
Interior design
DUFOUR Design
Design category
A
Notified body no.
CE/0607
Engine #
Lmax
Overall length
10.28 m
LH
Hull length
9.99 m
Bmax
Maximum beam
3.54 m
BH
Hull beam
3.54 m
HA
Max clearance
14.70 m
Standard mainsail area (approximately)
30 m²
Genoa area (approximate)
25 m²
Water capacity except water-heater of 20 L (approximately)
200 L + 160 L (option)
Diesel capacity (approximate)
160 L
Holding tank
45 L
Engine battery
75 Ah
Auxiliary battery (1 standard version + 1 option)
75 Ah + 75 Ah (option)
Primary means of propulsion
Sail
Maximum permissible on-board engine power
30 CV/21 kw
Total weight of liquids (all tanks full)
310 kg
Standard long ballast version
T
Draught
1.90 m
Weight of long ballast
1550 kg
mLCC
Light displacement
5674 kg
Short ballast version (option)
T
Draught
1.55 m
Weight of short ballast
1650 kg
mLCC
Light displacement
5724 kg
Nota bene: due to the trim and loading of the boat, it is usually not possible to use the entire
various tank capacities for freshwater and diesel. You are recommended to maintain a diesel
reserve of 20%.
This boat was evaluated using the stability index (STIX), the complete safety measurement concerning the
stability, which considers the effects the length of the boat, its displacement, the proportions of the hull, the
stability characteristics (recommended maximum load, all the fluids at maximum capacity of tanks, light
conditions and standard equipment installed on board; see manufacturer plate and tables above) as well as
resistance to flooding. The maximum total load is the sum of the recommended maximum load and the total
mass of various liquids (see ISO 12217-2: 2002)
The second index (AVS) represents the angle of vanishing stability in degrees.
Long ballast
Short ballast
Minimum
conditions (Mmo)
Loading
conditions (Mldc)
Minimum
conditions (Mmo)
Loading
conditions (Mldc)
STIX
35,23
33,40
33,75
32,10
AVS
126,6°
120,3°
124,7°
118,5°