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1 Preface

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2 Safety

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2.1

General

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3 Description

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3.1

Technical data

3.2

Function

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3.2.1 Anti surge control

4 Main components

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4.1

Overview

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4.2

Connections

4.3

Start-up valve

4.4

Flow restrictor FR 160

4.5

Anti surge control

4.6

Bearing temperature switches

4.7

Optional: Compressed air switch

5 Before installation

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5.1

Delivery check

5.2

Installation requirements

5.2.1 Location

5.2.2 Foundation

6 Installation

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6.1

Installing VAC 20

6.1.1 Indoor installation

6.1.2 Outdoor installation

6.1.3 Electrical installation

6.1.4 Compressed air installation

7 Using VAC 20

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7.1

Before start-up

7.2

Initial start-up

7.2.1 Checking the direction of rotation

7.2.2 Checking the Y/D time setting

7.2.3 Initial start-up with pilot signal cable

7.2.4 Adjusting Anti Surge Control by PLC

7.2.5 Adjusting Anti surge control by optional adaption kit

8 Maintenance

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8.1

8.2

8.3

8.4

8.5

Flow restrictor FR 160

8.5.1 Adjusting FR 160

8.5.2 Flow restrictor oil

8.6

Fan bearings temperature

8.7

Fan bearings

8.8

Motor bearings

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VAC 20

English

Instruction manual