Re: Replacing Radionics with Vista 20P

["Christopher Glaeser" <cdg@xxxxxxxxxxxxx>]

> The EOL for a smoke alarm must be at the last device.

It is two wire smokes and they used four wires to bring the EOL back to the
panel.  The smokes are model 2100TD.

I did the following measurements.

- Voltage at panel across 8 and 9 without smokes is 13.6 VDC

- Voltage across 8 and 9 with 2K resistor is 13+ VDC.  Panel works fine with
resister.

- Resistance across red and black fire wires is 2K.

- Voltage across 8 and 9 with smokes attached is 13+ VDC

- Voltage across EOLR is 13+ VDC

- Voltage at smoke is 13+ VDC

I guess the next step is to separate the smokes and test one at a time.  Any
other suggestions?

Best,
Christopher