Installation/Operation Precautions - Yaesu G-450ADC User Manual

Installation/Operation Precautions

• Always use (Metric) M8x16 bolts when mounting the rotor to the tower or roof tripod
mounting plate.
• Take care not to scratch the surface of the rotator or its mounting hardware. If the protec-
tive coating is scratched, the underlying metal may be subject to corrosion or rusting.
• During operation, do not suddenly reverse the rotation during operation, as this places a
large load on the internal components of the rotor. Let the antenna come to a complete
stop before reversing the direction of rotation.
• Do not engage the rotor for more than three minutes of continuous rotation. While this ro-
tor can operate for up to 3 minutes continuously, operation must thereafter be halted, and
the motor must be allowed to cool for at least 15 minutes afterwards.
• This rotator is designed to provide centered rotation of a mast with an outside diameter*
of between 48 mm and 50 mm (1.89" to 1.97" O.D.). If it is necessary to use a mast of di-
ameter less than 48 ~ 50 mm, nearly centered rotation can be achieved using the "GL-33"
mast adjustment plate (Not supplied with G-450ADC), per the illustrations below.
Mast Diameter φ32 to φ38: Use two plates.
Mast Diameter φ39 to φ47: Use one plate.
Mast Diameter φ48 to φ50: Do not use a plate.
The use of a mast of outside diameter greater than 51 mm (2.01") will result in off-center
rotation. The amount of offset increases with increasing mast diameter. A mast of 60 mm
outside diameter will result in rotation offset from the center by approximately 8 mm.
* Note that commonly available steel "water pipe" is (A) usually specified in terms of in-
side diameter, and (B) designed for holding in liquid under pressure; it is not particularly
designed to resist bending. Consult with your dealer or a professional tower/antenna
installer for assistance in procuring a mast of specifications adequate for your antenna
system.
Center line
Insert the mast adjustment plate(s) between the mast and the clamps on the rotor.
The rotation becomes off-centered for
masts with a diameter of less than φ48.
Mast adjustment plate (Not supplied with G-450ADC)
Use two plates for mast diameters between φ32 and
φ38.
Use one plate for mast diameters between φ39 and
φ47. Do not use a plate for mast diameters between
φ48 and φ50.
1