I am installing a security system (Honeywell/Ademco Vista 15p), and trying to figure out an installation of a 4-wire smoke detector.
According to the installation manual (http://www.nationwidesecuritycorp.com/wp-content/uploads/FA160C-Install-Manual.pdf, section 2-6, diagram in paragraph 3). It is necessary to install an end-of-line power supervision relay. My question is what's the purpose of that relay?
Does control panel uses that relay to verify the presence of power supplied to the 4-wire smoke detector? Or is it used to verify that power to the smoke detector is removed when smoke detector is being reset?
Also, I am little confused as to how do I connect multiple smoke detectors? Do I connect them in series or in parallel?
And one more - whit's the "heat detector", and do I connect it just like other 2-wire smoke detectors?