Andrew operation and maintenance Specifications download pdf (Page 20)

Chapter 2 - Installation

42S315F 2-8

NOTE

The required torque value for the foundation anchor bolts may

not be accurately achieved by the turn-of-the-nut method. For

these bolts, an accurate torque value of 400 to 450 lb-ft (542 to

610 Nm) is required.

2.4.4 Recommended Sequence of Assembly

In order to ensure proper and trouble-free installation, the following

installation sequence is recommended. The sequence is designed to minimize

crane usage time. The crane is only required for items 3, 5, and 6.

1. Site Preparation

2. Assembly of Reflector, Spars and Subreflector

3. Assembly of Mount and Actuators

4. Grouting Base Plate to Foundation

5. Reflector Installation

6. Feed and Waveguide Installation

7. Electrical Installation

8. Limit Switch Adjustment Procedure.

2.4.5 Preparation for Assembly

Before beginning the assembly read and understand the following

instructions.

ViaSat guarantees the antenna specifications, provided that the reflector

assembly procedure is performed by an installation crew trained and

approved by ViaSat, Inc.

Carefully study the assembly drawings to understand how the complete

reflector is assembled. The assembly drawings included in this manual are

examples of typical reflector assemblies with motorized polarization drives

without a de-ice system.

Clockwise and counterclockwise are as observed by a person looking down

onto the front of the reflector while the hub is positioned with its rear side

towards the ground.

Before starting the assembly, verify the following:

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Andrew operation and maintenance Specifications Page 20