Smoke detectors will not trip alarm

Support
1

I am setting up a GE Interlogix 60-792-01 system. It was installed in my house years ago but never hooked up. I have successfully connected the doors and windows but I cannot get the smoke detectors working. The smoke detectors are two wire.

I think the detectors are properly wired. There are 5 smoke detectors and one heat detector at the end of line. There is a resistor on the heat detector. The circuit has 2000 ohms on it, when I short the resistor the resistance goes to zero.

I connected the wires to terminal 22 for zone 8 and terminal 23 +12V. The LEDs on the detectors are flashing.

On the control panel I set:

Two Wire Detector - Yes
Smoke Verify - No

When I try to Learn Alarm I select group 26 and sensor 8 and try to trip the alarm. It will not detect a trip on the alarms. The heat sensor clicks when I heat it and the smoke detector LED goes solid red with smoke applied.

I must be missing something somewhere…

2

The model number given is not the exact model. It looks like this would be a Concord RF16, which could be either a Concord 1, 2, or 3.

That said, I am not myself seeing an issue with your description of installation.

Have you tried learning in that zone by simply using a jumper to short the terminals when the panel is awaiting it to trip?

3

One other thing to make sure is the model number. Concord 1, 2, and 3 use terminals 22 and 23 as you describe, but on Concord 4, the two wire smoke terminals are 22 and 24 (24 is Zone 8 and 22 is GND)

4

It is a Concord 3.

I did try shorting the resistor when the system was waiting for a trip but nothing happened.

There must be some little thing I missed. I think I will try connecting to another zone and see if that works.

5

Based on the description I would assume this is true, but verify that you have the resistor wired in parallel with the circuit, not in series. The detectors are normally open contacts, as opposed to security sensors which are usually normally closed.

6

Yes the resistor is wired in parallel.

I tried to use zone 7 for the smoke detectors but that did not work. Zone 7 does work with window sensors.

For testing purposes I put a normally open window sensor in place of the heat sensor. I connected the circuit to zone 7 and did a Learn Sensor and set it to zone 13 and it worked. So I know for sure the smoke detector circuit wiring is complete and zone 7 does work.

I then moved the circuit to zone 8 with the window sensor connected and when I did a Learn Sensor it did not work.

So it looks like the zone 8 does not work on the board.

7

I do not recall specifically with Concord 3 but you might try deleting zone 8 from programming first.

Have you gone into zones to see if 8 is currently listed?

It sounds like you’ve likely already done this, but just to make sure. It may also be used as another zone. If I recall, Concord zones do not necessarily need to match up with the physical terminals. So the terminals for zone 8 may be already used as another zone number.

8

I didn’t know the the zones do not have to match, that might be the problem. I don’t have any sensors attached to zone 7, just a resistor. Maybe that’s the problem. I’ll try deleting all the zones any try setting up just the smokes.