VESDA VLC, Руководство по обслуживанию

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VESDA VESDA Maintenance Guide
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2 Maintenance Considerations
Before beginning system maintenance, the important considerations are as follows:
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What equipment will be required?
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What will the maintenance schedule be?
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What unscheduled maintenance needs may arise?
2.1 Equipment Required
In order to properly maintain the VESDA system, you will require the following equipment:
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Phillips head screwdriver "1" (length 90 mm minimum) - for filter replacement.
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Phillips head screwdriver "2" - for removing all detector covers.
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6mm Allen Key - for removing the VESDA VLI front cover.
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10mm open ended spanner or Carstick - for removing tubes associated with the VESDA VLI detector
chamber.
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PC with Xtralis VSC and a High Level Interface (HLI), HLI model number VHX-0200 or VHX-0210. Xtralis
recommends the use of Xtralis VSC and a HLI. However, a hand-held programmer could also be used for
this purpose.
Note: Some detectors support alternate connection methods that do not require a HLI
device. For example, the VESDA VLI can be directly connected to using an Ethernet
or USB cable. Refer to the detector product guide for further information.
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Vacuum cleaner.
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Air compressor.
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Spare parts (refer to Appendix A).
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Records for commissioning and a maintenance history.
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Maintenance logs or record sheets.
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The original ASPIRE design file and commissioning history (optional).
2.2 Determining a Maintenance Schedule
The background smoke readings, recorded in the VESDA detector event log, provide a representative value
for the protected environment. Use of these logs allows the recommended filter replacement frequency to be
calculated, a maintenance program developed and a maintenance schedule determined.
Xtralis VSC can be used to access the event log to determine the average background smoke level. Average
smoke levels over a 15-minute period (minimum), where conditions should reflect the typical operating area,
provide enough data to determine the environment type. For clean environments, the significant smoke
change will need to be set to 0.005%obs/m (0.0015%obs/ ft) for the test period. Remember to return this
setting to its original value, once the test is completed.
Note: The following steps do not represent a complete list of instructions. You must also refer to the
sections, of this manual, specific to the various types of VESDA detector.
To determine an appropriate maintenance schedule, follow the instructions listed below:
1. Ensure that detectors are isolated from the monitoring panel and suppression systems.
2. Notify the relevant authorities about the work to be performed and the risks associated with isolating a
VESDA address.
3. If a filter fault is displayed, the current filter is older than the recommended filter replacement frequency.
Replace the filter according to the detector's guidelines, write the date of replacement on the label and, if
required, order stock for the next replacement date. The color codes for the dates of manufacture of VSP-
005 filters (as used in VESDA VLP, VESDA VLS, VESDA VLF and VESDA VLC detectors) are provided
in Table 2-1.