Airmar HT200 Owner's Manual & Installation Instructions - page 5
6. Clean, repair, or replace the valve assembly, so the flap valve
moves freely and seats against the valve housing (see Figure 3).
7. The O-rings must be intact and well lubricated to form a
watertight seal. To reinstall the valve assembly and insert/
blanking plug, inspect (replace if necessary) and lubricate all of
the O-rings with silicone lubricant or petroleum jelly (Vaseline®).
8. Remove the safety wire from the CAP nut and unscrew it. With
the valve assembly ready in one hand, remove the short
emergency plug. Rapidly slide the valve assembly into the
housing. Seat it into place with a pushing twisting motion until
the key fits into the notch. Screw the CAP nut in place hand
tighten only. Do not over tighten.
9. Reinstall the insert. Be sure the paddlewheel insert has the arrow
on the top pointing forward toward the bow. (The cable exit points
away from the bow.) Seat it into place with a pushing twisting
motion until the key fits into the notch. Screw the INSERT nut in
place and hand tighten only. Do not over tighten.
10.Attach the safety wire to the short emergency plug, the cap
nut, the insert nut, and the pull ring to prevent the insert from
backing out in the unlikely event that the insert nut and/or cap
nut fails or is screwed on incorrectly (see Figure 2).
ST850: Servicing the Paddlewheel Insert
Aquatic growth can impede or freeze the paddlewheel’s rotation
and must be removed. Clean the sensor with mild household
detergent and a Scotch-Brite® scour pad. If fouling is severe,
push out the paddlewheel shaft using a spare shaft or a 4D finish
nail with a flattened point. Then, lightly wet sand the paddlewheel
with fine grade wet/dry paper.
The water lubricated paddlewheel bearings have a life of up to 5
years on low-speed boats [less than 10kn (11MPH)] and 1 year
on high-speed vessels. Paddlewheels can fracture and shafts can
bend due to impact with water borne objects and mishandling in
boat yards. O-rings must be free of abrasions and cuts to ensure
a watertight seal. Order a replacement Paddlewheel, Shaft & O-
ring Kit No. 33-113.
1. Using the new paddlewheel shaft, push the old shaft out about
6mm (1/4"). With pliers, remove the old shaft (see Figure 3).
2. Place the new paddlewheel in the cavity with the flat side of the
blade facing the same direction as the arrow on the top of the
insert.
3. Tap the new shaft into place until the ends are flush with the
insert.
4. Install two of the small O-rings.
5. The remaining two small O-rings are for the long blanking plug.
6. To reinstall the paddlewheel insert, see “Installing” on page 2.
Follow steps 8 through 10.
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.
NMEA 2000 Specification
HT200 Load Equivalency Number (LEN)................................1
Replacement Sensor & Parts
The information needed to order a replacement sensor is printed
on the cable tag. Do not remove this tag. When ordering, specify
the part number and date. For convenient reference, record this
information at the top of page one.
Lost, broken, and worn parts should be replace immediately. If
you have purchased a plastic housing and have a wood hull or
desire greater strength, purchase an Airmar metal housing. If you
have a low profile housing and prefer a flush housing, see the
following list.
Part
Airmar Part Number
Blanking Plug
33-522-01
Paddlewheel, Shaft, O-ring Kit 33-113
Valve & Paddlewheel Kit
33-536-01
Cap Nut
04-234-1 (plastic)
02-131-01(bronze)
Hull Nut
04-004 (plastic)
02-030 (bronze)
Housing, Hull Nut & Washer 33-100
(bronze, low profile,B17)
33-217
(plastic, flush, P217)
33-092-01(plastic, flush, P314)
Obtain parts from your instrument manufacturer or marine dealer.
Gemeco
Tel: 803.693.0777
(USA)
Fax:
803.693.0477
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
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