Seiwa SW AP01 - Manual (Page 38)

revolutions’ in the table apply to that shaft. Note that the tables are for a helm swing
between 20 degree limits and are not the lock-to-lock ratings.
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The response times will vary according to the stiffness of the steering. The drive
motor and chain linkage must be mounted in a dry area of the hull.
Table 3.1 Driven sprocket sizes for a 12V system.
Hull length Up to 11 m 11 to 13 m Above 13 m
Response time
-20 to +20 deg 8 sec 10 sec 12 sec
Shaft revolutions
for
-20 to +20 deg
Driven Sprocket Size (teeth)
1 48 60 80
2 25 30 38
3 20 25 25
4 13 15 20
5 13 13 15
Table 3.2. Driven sprocket sizes for a 24V system.
Hull length Up to 11 m 11 to 13 m Above 13 m
Response time
-20 to +20 deg 8 sec 10 sec 12 sec
Shaft revolutions
for
-20 to +20 deg
Driven Sprocket Size (teeth)
1 70 85 105
2 38 38 48
3 25 30 38
4 15 20 25
5 15 15 20
Mount the drive unit so that its shaft is parallel to the driven shaft and the two
sprockets are in line. After fitting the chain and adjusting its tension, there should be
12mm of deflection for each metre length of chain. (1/2" for each 3 ft.) Lay the four-
core motor/clutch cable back to the Junction Box and terminate it according to Fig
3.12. Note that the CLUTCH NEG terminal is internally connected to the negative
power supply terminal.
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