EN 12845 Rules

The European fire sprinkler system standard EN 12845 or the relevant country standard must now be used.

We have tried to simplify some of your obligations below, some of which are installation requirements and others from the weekly testing regime - relating to our products.  The precis below is not exhaustive and we are happy to expand on this as you have the requirement.

PUMP STARTING REGULATIONS REQUIRE:

• Two pressure switches per pump, connected in series with normally closed contacts
• A non return valve to be installed in parallel with any valve which isolates  a switch
• Water pressure shall be reduced, thus simulating the condition of automatic starting
• Means shall be provided for testing pump starting with each switch
• Weekly test states that the water pressure on the starting device should be recorded
• Weekly test states that the start pressure shall be checked and recorded
• Pump start equipment must be adjacent to the pump room door
• Appropriate measures should be taken to prevent hunting in jockey pumps
• First pump cut in 90% of churn pressure
• Pump room temperature; Electric pumps 4 degrees, Diesel pumps 10 degrees, alarms must be in place to monitor this condition, equipment must be minimum IP54 
• Where necessary, appropriate measures should be taken to prevent hunting and water hammer resulting from jockey pump operation. Preferably by replacing the jockey pump.

TRUNK MAINS

To have a low pressure alarm, testing regime requires checking of the signal

AIR COMPRESSOR REGULATIONS REQUIRE

All of the previous BS5306 rules and TB's, plus larger system size upto 4metres cubed with an accelerator

For more information please call