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HI-FOG 1900 Identification And Correction Procedure

A1000 type assembly body with stop valve
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18/09/2017
HI-FOG® 1900 SPRINKLER
A1000 TYPE ASSEMBLY BODY WITH STOP VALVE
IDENTIFICATION AND CORRECTION PROCEDURE
The purpose of this document is to provide guidance and instructions for corrective
actions required to mitigate the risk of HI-FOG 1900 sprinkler installed in some
A1000 type assembly bodies with an internal stop valve as referred to in Safety
Bulletin 2017\004.
The information in this document is in the following order:
Introduction and General Work Instructions
1. Background information
2. Affected and other HI-FOG sprinkler types
3. Affected and other Assembly Bodies
4. Corrective Actions
5. Troubleshooting
Appendix A: Follow-Up form
Appendix B: Summary of Product Types Differences
HI-FOG Systems comprise mechanical components
and employ high-pressure for water pressurization.
System installation embraces high-pressure testing of discharge tubing.
Care must be taken to ensure that in the installation all relevant procedures are
followed to the satisfaction of the authority having jurisdiction
and that only competent personnel, appropriately trained, are
permitted to install, test, commission and service the system.
Document number 0003301084
WITH
CAUTION
Ver. A
Page 1 of 18

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Summary of Contents for HI-FOG 1900

  • Page 1 The purpose of this document is to provide guidance and instructions for corrective actions required to mitigate the risk of HI-FOG 1900 sprinkler installed in some A1000 type assembly bodies with an internal stop valve as referred to in Safety Bulletin 2017\004.

  • Page 2: Background Information

    1000 sprinklers using some of the improvements presented in the HI-FOG 2000 sprinklers. For some of the Assembly Body type A1000, there is a risk that a HI-FOG 1900 sprinkler will press the internal stop valve beyond the intended range and thus may diminish or in the worst case prevent the water flow to the sprinkler in case of discharge.
  • Page 3 18/09/2017 Affected and other HI-FOG sprinkler types The risk and the related corrective action required are relevant for HI-FOG 1900 sprinklers only. Other HI-FOG sprinkler types require none of the actions referred to by this document. To differentiate the HI-FOG 1900 sprinkler from other HI-FOG sprinkler types...
  • Page 4 Affected and other Assembly Bodies The risk and the related corrective action required are relevant only for HI-FOG 1900 sprinklers (see Chapter 2 to identify) when installed in some A1000 types Assembly Body, which contain an internal stop valve. HI-FOG sprinkler installed in other types of Assembly Body require none of the actions referred to by this document.
  • Page 5 Corrective Actions As corrective action the O-ring needs to be replaced and a spacer plate needs to be added to each HI-FOG 1900 sprinkler installed in A1000 type assembly body with an internal stop valve. Note: These instructions are intended for HI-FOG systems with electric powered pump units.
  • Page 6 Make sure that also the spare HI-FOG 1900 sprinklers are included in the work plan. Identify and log the location of all installed HI-FOG 1900 sprinklers. Use the HI- FOG sprinkler layout drawings as indication of potential locations of HI-FOG 1900 sprinklers (remember that HI-FOG 1900 sprinklers are replacements of HI- FOG 1000 sprinklers) and confirm the type visually (see Chapter 2 for details).
  • Page 7 18/09/2017 4.3. Performing corrective actions 4.3.1. Isolate the Accumulator Units Before starting corrective actions, switch on the Nitrogen blocking from the key switch on the control panel or disconnect the nitrogen accumulator unit (if applicable) to avoid the Figure 06 Figure 07 accidental release of nitrogen (see Figure 06 : Disconnecting the solenoid plug from a Bürkert valve...
  • Page 8 The section can be depressurized from the flushing valve with a flushing hose (see Figure 05 ). The flushing valves of the sections should be marked on the HI-FOG sprinkler layout drawings. Flushing valves are equipped with a flushing valve sign (see Figure 10 ).
  • Page 9 Close the test valve. Disconnect the hose. 4.3.3. Inspect and retrofit potentially affected Sprinklers a. Confirm that the Sprinkler is of type HI-FOG 1900 (see Chapter 2) Log the type and location of sprinkler in the Follow-Up sheet ( Appendix A ) Figure 11 : Location and type of sprinkler Inspect the Assembly Body.
  • Page 10 18/09/2017 ) and continue to the next sprinkler, there are no corrective actions needed. Figure 12 : Assembly Body type c. In case the Assembly Body cannot be visually identified, or is identified as A1000, remove the sprinkler by opening it with the correct sprinkler key or Figure 05 with a sprinkler dismounting tool (see Do not use excessive force or you might damage the sprinkler cage.
  • Page 11 NOTE: Do not use excessive force when tightening the sprinkler to avoid damaging the sprinkler. Figure 15 : HI-FOG 1900 installed with (left) & without (right) a spacer i. Remember to fill the record in the Follow-Up form before proceeding. Repeat the steps above until all potentially affected sprinklers in the section are corrected.
  • Page 12 Figure 07 switched back on / reconnected. (see NOTE: Make sure that there is no activation demand on for the HI-FOG system before reconnecting the nitrogen accumulator units! Inform the bridge and ECR that the work is completed and the system is in normal stand-by mode.

  • Page 13: Troubleshooting

    18/09/2017 Troubleshooting 5.1. Leakage of retrofitted or reinstalled sprinkler Leakage can be caused e.g. when the O-ring is not replaced and the Spacer plate is used, when the O-ring is damaged or misplaced, or when the sealing surface on the sprinkler or the Assembly Body is scratched or contaminated. Corrective actions: Depressurise the system Remove the sprinkler and make sure that all the surfaces of the...
  • Page 14 18/09/2017 5.3. Cover plate missing Figure 01 Assembly Body type A1000 with or without cover plate (see ) needs to be addressed in the same manner. Document number 0003301084 Ver. A Page 14 of 18...

  • Page 15: Appendix A : Follow-Up Form

    22.Sep.17 stock Item Code of a sprinkler is a series of letters and digits, starting with ‘C’, printed on the side of HI- FOG 1000 \ 1900 sprinklers Figure 03 Type : A1000 \ A2000 \ AB \ C (see date of installing replacement O-Ring and Spacer OR ‘X’...
  • Page 16 18/09/2017 Sprinkler Location Assembly body Code* Deck Section Type** stop valve Change [y/n] Date*** e.g. C-0006881 Deck 5 S017 A1000 21.Sep.17 e.g. C-0009072 Spare part 22.Sep.17 stock … Document number 0003301084 Ver. A Page 16 of 18...

  • Page 17: Appendix B : Summary Of Product Types Differences

    - No cone - Groove above the - No groove - No groove - No groove cone Action Required No Action Required Figure 02 : HI-FOG sprinkler types A1000 types A2000 types AB types C types Notes: Notes: Notes: Notes:...
  • Page 18 Spacer plate to be assembled on the ring supplied with sprinklers HI-FOG 1900 sprinkler Figure 14 : replacement of O-Ring and installation of Spacer plate Figure 15 : HI-FOG 1900 installed with (left) & without (right) a Spacer plate A1000 Assembly body Grooved Assembly body type...