Airmar CA500 Owner's Manual - Airmar
4
Operation, Maintenance, & Parts
How the Valve Works
WARNING: THE VALVE IS NOT A WATERTIGHT SEAL!
Always use the insert or the blanking plug secured with the safety
wire for a watertight seal.
The camera incorporates a self-closing valve which minimizes the
flow of water into the boat when the insert is removed. The curved
flap valve is activated by both a spring and water pressure. Water
pushes the flap valve upward to block the opening, so there is no
gush of water into the boat.
Using the Blanking Plug
To protect the camera, use the blanking plug when:
• The boat will be kept in salt water for more than a week.
• The boat will be removed from the water.
• Aquatic growth buildup on the camera lens is suspected due to
poor images on the display.
WARNING: The O-rings must be intact and well lubricated to
make a watertight seal.
WARNING: Be sure the blanking plug is fully inserted into the
housing and the cap nut is screwed on completely to make a
watertight seal.
WARNING: Always attach the safety wire to prevent the blanking
plug from backing out in the unlikely event that the cap nut fails or
is screwed on incorrectly.
1. On the blanking plug, inspect the O-rings (replace if necessary)
and lubricate them with the silicone lubricant supplied or
petroleum jelly (Vaseline
®
) (see Figure 6).
2. Remove the insert from the housing by removing the safety wire
and unscrewing the cap nut (see Figure 2). This will jack out the
insert.
3. Grasp the insert and remove it with a slow pulling motion. Slide
the blanking plug into the housing.
NOTE: In the unlikely event that the valve breaks:
Plastic housing—Replace the housing the next time the boat
is hauled.
Stainless steel housing—Replace the valve assembly the
next time the boat is hauled.
4. Screw the cap nut several turns until the threads are engaged.
Continue to tighten the cap nut. Hand-tighten only. Do not
over-tighten.
5. Reattach the safety wire.
Winterizing
After the boat has been hauled for winter storage, remove the
blanking plug to let the water drain away before reinserting it. This
will prevent any water from freezing around the blanking plug and
possibly cracking it.
Cleaning the Insert
Aquatic growth can accumulate rapidly on the camera’s surface
reducing performance within weeks. Clean the insert with a
Scotch-Brite® scour pad and mild household detergent, being
careful to avoid scratching the lens.
Replacing the O-rings
WARNING: The O-rings must be the correct size, intact, and well
lubricated to make a watertight seal.
O-rings must be free of abrasions and cuts to ensure a watertight
seal. Replacement O-rings are available. Install two O-rings on
the camera insert and two O-rings on the blanking plug (see
Figure 6).
Replacement Parts
Lost, broken, or worn parts should be replaced immediately. If you
have purchased a plastic housing and have a wood hull or desire
greater strength, purchase a stainless steel housing.
Blanking plug
33-538-01
O-rings
09-146
Plastic hull nut
04-004
Washer
09-452
Plastic housing kit (P617V)
33-510-01
Stainless steel hull nut
02-570-01
Isolation bushing
04-186-1
Stainless steel housing kit (SS617V)
33-617-01
Obtain parts from your instrument manufacturer or marine dealer.
Gemeco (USA)
Tel: 843.210.7000
Fax: 843.210.7170
email: sales@gemeco.com
Airmar EMEA
Tel: +33.(0)2.23.52.06.48
(Europe, Middle East, Africa)
Fax: +33.(0)2.23.52.06.49
email: sales@airmar-emea.com
Figure 6. Replacing the O-rings
blanking plug
camera insert
O-rings
Copyright © 2008 Airmar Technology Corp.
AIRMAR
®
TECHNOLOGY CORPORATION
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
■
www.airmar.com
Copyright © 2008 Airmar Technology Corp. All rights reserved.
O-rings