Replacing old Series 90 Heats/ions and Zmu's

[bazzfire]

We have been in the process of upgrading an Hospital accomadation building of 15 floors. the original 8 loop panel has been changed to an 8 loop advanced panel. we changed the panel out and relearned the loops which have old series 90 devices on whith a few Xp95's dotted about the floors, the panel has sat there lovely for 3 weeks until we started the renewel of all series 90 devices to Apollo MultiSensors there the problems started. we now have missing devices and double addresses on the loop Which do not exist. I phoned apollo but they say there is no compatibilty problems???. I am for the first time in years stuck to what this problem could be as i have tested checked re-checked the loops and devices and still no luck, the panel does not mind around 6 Multi's on the loop but anymore is a no no.

[Mike]

Hi

have you checked the loop calculator downloadable from apollo, a multisensor (discovery or XP95) takes about 50% more power than a smoke

500mA available per loop from advanced panels

[Rosjes]

I have experienced a similar problem with Discovery optical on an Advanced panel. The symptons were intermittent and erratic double addresses, corrupt data and devices missing. When present, the fault would affect devices that were not in fault by rendering them inoperative. After much searching on a heavily populated loop with sufficient isolators, I found the cause to be a rogue detector.
I would also recommend that any S90 isolators are changed for XP devices as these can cause problems.

[Graeme]

i have had exactly the same problems with Discovery on an advanced panel.

double address faults after weeks of normal operation which then cause the good detector to go into device missing fault.

only had this with Discovery not XP95

[fuzzy]

Not sure if you're still having this problem, but Apollo have informed our company of a manufacturing defect on the discovery multisensors where the plastic moulding tool was faulty which made the coding pips 2mm short, this will lead to the unit not addressing correctly.

This was communicated to us around the 10th December 2007.

Thanks.

[Allen Higginson]

Not sure if you're still having this problem, but Apollo have informed our company of a manufacturing defect on the discovery multisensors where the plastic moulding tool was faulty which made the coding pips 2mm short, this will lead to the unit not addressing correctly.

This was communicated to us around the 10th December 2007.

Thanks.

Thanks for that - good to know.

[Galeon]

Might help , you probably have longer M4 screws on the series 90 bases , and if they are just a bit to long you will get distortion on the xp base , particularly when the temperature changes , we had this on the 1st xp job we did in London  (How Fire) around 91 or 92.
The bases haven't changed since that time , so it may be worth a look at this , unless you have already been down this route.