Xtralis VESDA VLI Istruzioni per il montaggio

Doc 27212_01 1

Technical Tip

Clean Air Zero

Overview

Clean Air Zero is a user-initiated VLI feature which compliments absolute detection and safeguards against

nuisance alarms.

This is achieved by introducing clean air into the detection chamber and taking a reference reading of the

chamber background. This reading is then offset against the actual environmental background to maintain

consistent absolute smoke detection over time.

The user can initiate the Clean Air Zero process using Xtralis VSC. It takes up to 60 seconds to complete,

during which time the detector is offline.

Process

When the user initiates the Clean Air Zero process from within the Xtralis VSC software, the following actions

occur:

1. The main aspirator is shut down.

2. The Clean Air Zero aspirator inside the detection chamber is activated, which circulates clean air only

within the detection chamber.

3. After a waiting period, a smoke reading is taken with clean air only in the chamber, which forms the new

clean air background value and is used as a reference point against the actual environmental background.

4. The Clean Air Zero aspirator is shut down and the main aspirator is re-activated.

5. An event indicating that the Clean Air Zero process has taken place is added to the event log.

Preparation

•The Clean Air Zero function shall be activated during every routine maintenance site visit

oClean and Back-Flush the VESDA pipe network as required prior to activating ‘Clean Air

Zero’.

oEnsure dust or other contaminants have not fallen into the VLI pipe inlets if pipes are removed

for Back-Flush.

oCheck all pipes are re-inserted correctly into the VLI pipe inlets.

oPower the VLI and observe for any fault conditions.

oRe-normalise VLI

oActivate Clean Air Zero function.

AUTHORISED DISTRIBUTOR OF VESDA

www.flamestop.com.au | [email protected]

The contents of this document are provided on an “as is” basis. Norepresentation or warranty (either express or implied) is made as tothe

completeness, accuracy or reliability of the contents of this document. Themanufacturer reserves the right tochange designs orspecifications

without obligation and without further notice. Except as otherwise provided, all warranties, express or implied, including without limitation any implied

warranties ofmerchantability and fitness for a particular purpose are expressly excluded.

Xtralis, Xtralis logo, The Sooner You Know, VESDA, ICAM, ECO, OSID, HeiTel, ADPRO, IntrusionTrace, and LoiterTrace are trademarks and/or

registered trademarks of Xtralis and/or its subsidiaries in the United States and/or other countries. Other brand names mentioned herein are for

identification purposes only and may be trademarks of their respective holder(s). Your use of this document does not constitute or create a licence or

any other right to use the name and/or trademark and/or label.

This document is subject to copyright owned by Xtralis. You agree not to copy, communicate to the public, adapt, distribute, transfer, sell, modify or

publish any contents of this document without the express prior written consent of Xtralis.

Doc: 27212_01

Procedure

1. Connect to the VLI detector using the latest version of VSC (available at www.xtralis.com)

2. Activate the Clean Air Zero function which is found under the Device tab, as shown below.

3. Enter the password when requested. If you do not know the password, please contact the local VESDA

distributor.

4. Read the warning and ensure all of the required processes

are in place, once ready click YES to proceed.

5. Wait for one minute and then check the detailed status tab

as shown below at the completion if Clean Air Zero process.

AUTHORISED DISTRIBUTOR OF VESDA

www.flamestop.com.au | [email protected]

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