Furuno GP-1670F User manual

Installation Manual
GPS PLOTTER/SOUNDER GP-1670F
GP-1870F
SAFETY INSTRUCTIONS................................................................................................i
1. MOUNTING..............................................................................................................1-1
1.1 Mounting of Display Unit...............................................................................................1-1
1.2 Replacement Kit (option) ..............................................................................................1-2
2. INSTALLATION OF TRANSDUCERS .....................................................................2-1
2.1 How to Mount a Transducer through the Unit...............................................................2-1
2.2 Transom Mount Transducer..........................................................................................2-3
2.3 How to Mount a Transducer inside the Hull..................................................................2-4
3. WIRING....................................................................................................................3-1
3.1 Display Unit...................................................................................................................3-1
3.2 Transducer....................................................................................................................3-2
3.3 External Equipment.......................................................................................................3-2
PACKING LIST ...........................................................................................................A-1
OUTLINE DRAWINGS................................................................................................D-1
INTERCONNECTION DIAGRAMS ............................................................................. S-1
All brand and product names are trademarks, registered trademarks or service marks of their respective holders.
www.furuno.com

i
SAFETY INSTRUCTIONS
The user and installer must read the appropriate safety instructions before attempting to install or
operate the equipment.
WARNING
WARNING
Do not open the equipment.
The equipment uses high voltage that
can cause electrical shock. Refer any
repair work to a qualified technician.
If water leaks into the equipment or
something is dropped into the equip-
ment, immediately turn off the power
at the switchboard.
Fire or electrical shock can result.
If the equipment is giving off smoke
or fire, immediately turn off the power
at the switchboard.
Fire or electrical shock can result.
If you feel the equipment is acting
abnormally or giving off strange
noises, immediately turn off the
power at the switchboard and contact
a FURUNO service technician.
Mandatory Action
Prohibitive Action
WARNING
CAUTION
Warning, Caution
The operator must read the safety instructions before attempting to operate the equipment.
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided,
could result in minor or moderate injury.
WARNING
WARNING
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury
can result.
Make sure no rain or water splash
leaks into the equipment.
Fire or electrical shock can result if
water leaks into the equipment.
Do not place liquid-filled containers
on or near the equipment.
Fire or electrical shock can result if a
liquid spills into the equipment.
Do not operate the equipment with
wet hands.
Electrical shock can result.
Use the proper fuse.
Use of the wrong fuse can cause fire or
electrical shock.

1-1
1. MOUNTING
1.1 Mounting of Display Unit
Mounting considerations
The display unit can be installed on a tabletop or flush mounted in a console.
Select a suitable mounting location considering the following:
• Keep the display unit out of direct sunlight.
• The temperature and humidity should be moderate and stable.
• Locate the unit away from exhaust pipes and vents.
• The mounting location should be well ventilated.
• Mount the unit where shock and vibration are minimal.
• Keep the unit away electromagnetic field generating equipment such as motor, gen-
erator.
• For maintenance and checking purposes, leave sufficient space at the sides and
rear of the unit and leave slack in cables.
• A magnetic compass will be affected if placed too close to the display unit. Observe
the compass safe distances shown in the Safety Instructions to prevent disturbance
to the magnetic compass:
Mounting procedure
Follow the procedure below to mount the display unit on a tabletop or in a console.
Refer to the outline drawing at the back of this manual.
• Tabletop, mounting
1. Fix the hanger by four tapping screws φ4.8×22.
2. Screw knob bolts in display unit, set it to hanger, and tighten knob bolts.
3. Attach hard cover to protect LCD.
• Flush mounting
Follow the procedure below to mount the display unit in a console. Refer to the out-
line drawing at the back of this manual.
1. The thickness of the cutout should be 5 to 20 mm.
2. Prepare a cutout in the mounting location whose dimensions are shown in the
outline drawing at the back of this manual.
3. Screw in four threaded rods into the display unit.
4. Peel the paper from flush mount gasket and set the gasket to the display unit.
5. Set the display unit to the cutout and fasten it with the washers and nuts.

1. MOUNTING
1-2
1.2 Replacement Kit (option)
For replace from the flush mounted former type display unit (GP-1650 ser.) to GP-
1670F/1870F, the replacement kit (option) is available. Follow the procedure below to
replace a display unit.
1. Remove the former display unit from panel.
2. Fix the display unit GP-1670F/1870F onto the repracement kit by four lods, wash-
er and nuts.
3. Set the display unit to the cutout and fasten it with four tapping screws φ5×20.
260
160
240
140
210
202
132
50.8
5
4-φ6
GP-1670/1670F Replacement Kit GP-1870/1870F Replacement Kit
286
266
238
230
132
160 140
50.8
4-φ6
5

2-1
2. INSTALLATION OF TRANSDUC-
ERS
2.1 How to Mount a Transducer through the Unit
Transducer mounting location
The thru-hull mount transducer provides the best performance of all, since the trans-
ducer protrudes from the hull and the effect of air bubbles and turbulence near the hull
skin is reduced. When the boat has a keel, the transducer should be at least 30 cm
away from it.
The performance of this fish finder is directly re-
lated to the mounting location of the transduc-
er, especially for high-speed cruising. The
installation should be planned in advance,
keeping the length of the transducer cable and
the following factors in mind:
• Air bubbles and turbulence caused by move-
ment of the boat seriously degrade the
sounding capability of the transducer. The
transducer should, therefore, be located in a
position where water flow is the smoothest.
Noise from the propellers also adversely af-
fects performance and the transducer should
not be mounted nearby. The lifting strakes
are notorious for creating acoustic noise, and these must be avoided by keeping the
transducer inboard of them.
• The transducer must always remain submerged, even when the boat is rolling,
pitching or up on a plane at high speed.
• A practical choice would be somewhere between 1/3 and 1/2 of the boat's length
from the stern. For planing hulls, a practical location is generally rather far astern,
so that the transducer is always in water regardless of the planing attitude.
28
22
120
68
30
24
120
68
87
Unit: mm
520-5PSD 520-5MSD
BOW

2. INSTALLATION OF TRANSDUCERS
2-2
Transducer mounting locations
Installation procedure
1. With the boat hauled out of the water, mark the location chosen for mounting the
transducer on the bottom of the hull.
2. If the hull is not level within 15° in any direction, fairing blocks made out of teak
should be used between the transducer and hull, both inside and outside, to keep
the transducer face parallel with the water line. Fabricate the fairing block as
shown below and make the entire surface as smooth as possible to provide an un-
disturbed flow of water around the transducer. The fairing block should be smaller
than the transducer itself to provide a channel to divert turbulent water around the
sides of the transducer rather than over its face.
3. Drill a hole just large enough to pass the threaded stuffing tube of the transducer
through the hull, making sure it is drilled vertically.
4. Apply a sufficient amount of high quality caulking compound to the top surface of
the transducer, around the threads of the stuffing tube and inside the mounting
hole (and fairing blocks if used) to ensure watertight mounting.
Within the wetted bottom area
Deadrise angle within 15°
Position 1/2 to 1/3 of the hull from stern.
15 to 30 cm off center line (inside first lifting
strakes.)
DEEP V
HULL
HIGH SPEED
V HULL
Hole for
stuffing tube
Saw along
slope of hull.
Upper Half
Lower Half
BOW

2. INSTALLATION OF TRANSDUCERS
2-3
5. Mount the transducer and fairing blocks and tighten the locknut. Be sure that the
transducer is properly oriented and its working face is parallel to the waterline.
Note: Do not over-stress the stuffing tube and locknut through excessive tightening,
since the wood block will swell when the boat is placed in the water. It is suggested
that the nut be tightened lightly at installation and retightened several days after the
boat has been launched.
Transducer preparation
Before putting the boat in water, wipe the face of the transducer thoroughly with a de-
tergent liquid soap. This will lessen the time necessary for the transducer to have good
contact with the water. Otherwise the time required for complete "saturation" will be
lengthened and performance will be reduced.
DO NOT paint the transducer. Performance will be affected.
2.2 Transom Mount Transducer
The optional transom mount transducer is very commonly employed, usually on rela-
tively small I/O or outboard boats. Do not use this method on an inboard motor boat
because turbulence is created by the propeller ahead of the transducer.
DO NOT overtighten screws; they may be damaged.
Flat Hull
Deep-V Hull
Flat Washer
Rubber Washer
Fairing
Block
Hull
Hull
Flat Washer
Rubber
Washer
Cork
Washer
Transom
Transom
Stripe
Parallel with hull
Mount at the stripe.
Less than 10°
Over 10°

2. INSTALLATION OF TRANSDUCERS
2-4
Installation procedure
A suitable mounting location is at least 50 cm away from the engine and where the
water flow is smooth.
1. Drill four pilot holes for self-tapping screw (5x20) in the mounting location.
2. Coat the threads of the self-tapping screws (5x14) for the transducer with silicone
sealant for waterproofing. Attach the transducer to the mounting location with the
self-tapping screws.
3. Adjust the transducer position so the transducer faces right to the bottom. If nec-
essary, to improve water flow and minimize air bubbles staying on the transducer
face, incline the transducer about 5° at the rear. This may require a certain amount
of experimentation for fine tuning at high cruising speeds.
4. Tape the location shown in the figure below.
5. Fill the gap between the wedge front of
the transducer and transom with epoxy
material to eliminate any air spaces.
6. After the epoxy hardens, remove the
tape.
2.3 How to Mount a Trans-
ducer inside the Hull
The transducer may also be installed inside the hull on FRP boats. However, this in-
stallation method affects the ability to detect the bottom, fish and other objects be-
cause the ultrasound pulse is weakened when it passes through the hull.
Note: This mounting method should not be used to mount the transducer that sup-
ports the ACCU-FISHTM and/or bottom discrimination display feature, since perfor-
mance is greatly degraded.
Necessary tools
You will need the following tools:
• Sandpaper (#100)
• Silicone sealant
• Silicone grease
5x20
M5x14
5°
Taping
Bracket
Transducer
Hull
2 to 5°
Epoxy material

2. INSTALLATION OF TRANSDUCERS
2-5
Remarks on installation
Installation procedure
If the thickness of the hull varies, then the attenuation of the ultrasound pulse. Select
a location where attenuation is the lowest.
1. Select 2-3 locations considering the four points mentioned below. (You will finalize
the mounting location through some trial and error later.)
• Mount the transducer at a location 1/2 to 1/3 of the length of the boat from the
stern.
• The mounting location is between 15 to 50 cm from the centerline of the hull.
• Do not place the transducer over hull struts or ribs which run under the hull.
• Avoid a location where the rising angle of the hull exceeds 15°, to minimize the
effect of the boat's rolling.
2. Clean the face of the transducer to remove any foreign material. Lightly roughen
the face with #100 sandpaper. Also, use the sandpaper to roughen the inside of
the hull where the transducer is to be mounted.
3. Wipe off any sandpaper dust from the face of the transducer.
4. Dry the face of the transducer and the hull.
Coat the transducer face and mounting loca-
tion with silicone sealant. Hardening begins in
approx. 15-20 minutes so do this step without
delay.
• Do the installation with the ship moored at a dock, etc. The water depth should be 6.5-
32 feet (2-10 meters).
• Turn off the engine.
• Install the transducer with the engine room.
• Do not power the unit with the transducer in the air, to prevent damage to the trans-
ducer.
• Do not use this method on a double layer hull.
• Before attaching the transducer to the hull, check that the site is suitable. Put the
transducer in a water-filled plastic bag. Connect the transducer to the display unit and
put the transducer on the installation site. Turn on the display unit and check that the
depth indication appears.
1/3
1/2
Centerline
Transducer
mounting
location
50 cm
50 cm
15 cm
15 cm
Transducer
Silicone
Sealant

2. INSTALLATION OF TRANSDUCERS
2-6
5. Attach the transducer to the hull.
Press the transducer firmly down on the hull
and gently twist it back and forth to remove
any air which may be trapped in the silicone
sealant.
6. Support the transducer with a piece of wood
to keep it in place while the sealant is drying.
It takes 24-72 hours to harden completely.
Hull
Silicone
Sealant