FAS with two different levels of protection !

[Benzerari]

In a building of two separate entrances and two back exits as well, one for each part, (left side and right side), the whole building is covered with one single conventional system, the right side of the building is covered with M system, only manual call points where there are a theater and many officies including common area..., the left side of the building is covered to L2 system, with quite the same surface as the right side. the other issue is that the panel has 2 zones, but only one zone used for the whole site, it's about (50m*100m)

Does that sounds OK? or the building has to be re-assessed?

[kurnal]

Theres nothing necessarily wrong provided the coverage and protection delivered by the fire alarm is appropriate to the particular scenario.

If there is adequate  fire compartmentation between the two parts and an M system is appropriate to the way one side of the building is used, and if a fire in this side cannot affect the safety of persons in the other side then it may be ok. It really needs a risk assessment to confirm this though.

[Benzerari]

But what about the zoning?

[Big_Fella]

2000m2 is maximum recommended for a zone... Would need to look at the exact size per zone, but looks like they may go over this

[kurnal]

Yes. good point about the zones, missed that on first reading. That makes it crazy - apart from the size of the zones if different occupiers have been put in the same zone.Dont suppose its addressable?. 

[Graeme]

conventional

[Benzerari]

conventional

Indeed; very old fire sense 2 zones conventional panel, only one used for the whole site!

[Allen Higginson]

It was initially an M category system so the zone could go up to 10000m2 then the smokes were added afterwards?
Maybe the detectors were meant to be on their own zone (which as it is only covering half could be around the 2000m2 mark) and the MCP's on their own zone and someone made a boo boo?

[Graeme]

or maybe it was done by a sparky...that's usually the case when it's wrong.

[Allen Higginson]

or maybe it was done by a sparky...that's usually the case when it's wrong.

Now,now Graeme!!!

[Benzerari]

It was initially an M category system so the zone could go up to 10000m2 then the smokes were added afterwards?
Maybe the detectors were meant to be on their own zone (which as it is only covering half could be around the 2000m2 mark) and the MCP's on their own zone and someone made a boo boo?

That's good guess, as the left side of the building has new install stuff; trunkings, detectors and MCPs, while the right side has old MCPs and hidden cabling.

Fully comprehensive contract, not sure who should pay to put it right

[Graeme]

if it is recent work then in an ideal world whoever done it should but i would put money on that unless the customer is willing then no one and it will probably never get done.

[Benzerari]

if it is recent work then in an ideal world whoever done it should but i would put money on that unless the customer is willing then no one and it will probably never get done.

It isn't a recent work but we took over the site for maintenance..., also the main panel is in the side of the manual system..., Buzz's guess is likely to be right.