OPII, 4 wire smoke and EOLs

[charliebarns]

I'm about to complete my order on AO for a new system and I'm wondering about 4 wire smokes. According to the KB on HAI "All fire devices (smoke, heat, and gas detectors) must be wired normally open, with a 1K resistor installed." Ok no problem I understand that, but since I'll be disabling EOL resistors on the Panel will I still need EOLs for the smokes? Also, I found recommendations on 2 wire smokes to use with HAI but no recommendation on 4 wires. Is there an approved list or will any 4 wire smoke do?

thx

CB

 

[JamesF]

All 4 wire smokes should be fine. Also you will need an EOL resistor no matter what on smoke/gas zones.

 

[Digger]

For 4 wire smokes and co detectors you should use an EOL Relay/Resistor rather than just an EOL Resistor so you are monitoring the power to the devices as well. If there were to be a break in the power wiring you would not know if you dont do this. Obviously without power the smokes etc would not work (but the zone would look normal if you just use a EOL Resistor). The installation instructions for the panel will explain this I am sure.

 

[ASIHome]

I'm about to complete my order on AO for a new system and I'm wondering about 4 wire smokes. According to the KB on HAI "All fire devices (smoke, heat, and gas detectors) must be wired normally open, with a 1K resistor installed." Ok no problem I understand that, but since I'll be disabling EOL resistors on the Panel will I still need EOLs for the smokes? Also, I found recommendations on 2 wire smokes to use with HAI but no recommendation on 4 wires. Is there an approved list or will any 4 wire smoke do?

thx

CB

You cannot disable resistors in an HAI when using NO devices. If you only ever use NC devices you can disable but as soon as you add a single NO device, resistors nust be turned back on and all devices must have a resistor.

 

[charliebarns]

I'm about to complete my order on AO for a new system and I'm wondering about 4 wire smokes. According to the KB on HAI "All fire devices (smoke, heat, and gas detectors) must be wired normally open, with a 1K resistor installed." Ok no problem I understand that, but since I'll be disabling EOL resistors on the Panel will I still need EOLs for the smokes? Also, I found recommendations on 2 wire smokes to use with HAI but no recommendation on 4 wires. Is there an approved list or will any 4 wire smoke do?

thx

CB

You cannot disable resistors in an HAI when using NO devices. If you only ever use NC devices you can disable but as soon as you add a single NO device, resistors nust be turned back on and all devices must have a resistor.

thanks I'm aware of that but how does that factor into smokes? I'll be using NC on almost all the zones, except the smokes which will need resistors. Now does that mean that since I'll have smokes with resistors then all my NC zones will then also need EOLs? Or does the OPII treat a smoke zone differently?

Thx

 

[ASIHome]

thanks I'm aware of that but how does that factor into smokes? I'll be using NC on almost all the zones, except the smokes which will need resistors. Now does that mean that since I'll have smokes with resistors then all my NC zones will then also need EOLs? Or does the OPII treat a smoke zone differently?

Thx

From my previous post: "...as soon as you add a single NO device, resistors nust be turned back on and all devices must have a resistor."

Which means as soon as you add one NO device to your HAI panel you have to then go back an put EOL's on all zones whether they are NO or NC no matter what type of zone.

 

[charliebarns]

thanks I'm aware of that but how does that factor into smokes? I'll be using NC on almost all the zones, except the smokes which will need resistors. Now does that mean that since I'll have smokes with resistors then all my NC zones will then also need EOLs? Or does the OPII treat a smoke zone differently?

Thx

From my previous post: "...as soon as you add a single NO device, resistors nust be turned back on and all devices must have a resistor."

Which means as soon as you add one NO device to your HAI panel you have to then go back an put EOL's on all zones whether they are NO or NC no matter what type of zone.

Thanks. Guess I should do it now while the walls are still open.

 

[JamesF]

thanks I'm aware of that but how does that factor into smokes? I'll be using NC on almost all the zones, except the smokes which will need resistors. Now does that mean that since I'll have smokes with resistors then all my NC zones will then also need EOLs? Or does the OPII treat a smoke zone differently?

Thx

From my previous post: "...as soon as you add a single NO device, resistors nust be turned back on and all devices must have a resistor."

Which means as soon as you add one NO device to your HAI panel you have to then go back an put EOL's on all zones whether they are NO or NC no matter what type of zone.

Thanks. Guess I should do it now while the walls are still open.

Sorry for the delayed response to this thread. If you have resistors set to "No" then for any zone that isn't fire/gas on the main panel or hardwired expanders you will not need resistors. For any zone set to Fire/Gas or on an expansion enclosure, you will need resistors.

Now if you begin to use NO devices on zones other then Gas/Fire, you will need to change the setting back to "Yes" for EOL resistors and use EOL resistors for all zones.

 

[charliebarns]

thanks I'm aware of that but how does that factor into smokes? I'll be using NC on almost all the zones, except the smokes which will need resistors. Now does that mean that since I'll have smokes with resistors then all my NC zones will then also need EOLs? Or does the OPII treat a smoke zone differently?

Thx

From my previous post: "...as soon as you add a single NO device, resistors nust be turned back on and all devices must have a resistor."

Which means as soon as you add one NO device to your HAI panel you have to then go back an put EOL's on all zones whether they are NO or NC no matter what type of zone.

Thanks. Guess I should do it now while the walls are still open.

Sorry for the delayed response to this thread. If you have resistors set to "No" then for any zone that isn't fire/gas on the main panel or hardwired expanders you will not need resistors. For any zone set to Fire/Gas or on an expansion enclosure, you will need resistors.

Now if you begin to use NO devices on zones other then Gas/Fire, you will need to change the setting back to "Yes" for EOL resistors and use EOL resistors for all zones.

Crystal clear now! Thanks James!

CB