Download Reliable Single Interlock Preaction System Specifications

Loss Prevention Certification Board
(LPCB) Installation Requirements of
Preaction systems Include:
1. Solenoid valves shall be installed in parallel.
2. Solenoid valves shall function in pneumatic conditions only, and be protected by a strainer.
8. Pre-action system equipment shall be installed, operated and maintained as prescribed in the firm’s installation , operating and maintenance manual.
3. LPCB Certified detectors compatible with the control
and indicating equipment shall be used.
9. Pre-action systems shall be configured in accordance
with the manufacturer’s defined specifications.
4. Suitable electrical detection, control and indicating
equipment and pneumatic systems shall be used.
The control and indicating equipment shall be LPCB
approved / certificated.
10.Pre-action systems shall comply with the details specified in the related LPC Technical Bulletin (Ref. TB21).
5. Connecting cables shall comply with BS 6387:1983,
classification C, W, Z evidenced by LPCB certification.
12.Normally un-energized solenoids may be used, provided that they are continuously monitored for ‘open’
and ‘short circuit.’
11.The firm responsible for the complete pre-action station, including electrics, shall be identified.
6. Pre-action systems shall be electrically monitored to
demonstrate that they are in a ‘ready to operate’
state at all times.
7. Clear dry air shall be used. Compressor tank must
have provision for draining.
Fig. 1
3.