ADEMCO Vista-20HW Troubleshooting Guide download pdf (Page 21)

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This section provides general information for the hard-wired zones in the system, plus specific

instructions for installing 2-wire smoke detectors, 4-wire smokekombustion detectors, and 2-wire

latching type glass break detectors. Also included is a procedure for programming the hard-wired zones.

Installing the Hard-Wwed Zones

Common Characteristics for Zones 1-S

●

Can be assigned to any partition

EOLR supervised zones supporting both open circuit and closed circuit

devices

As many 4-wire smoke detectors as can be powered from Aux Power on the

control (zones 2-7)

Programmable for 10, 350, or 700 msec response

350 msec (default) should be used for most standard contacts. For

vibration type contacts, 10 msec is more suitable

Whing Burglary and Panic Devices To Zones 1-S

1. Comect sensors/contacts to the hard-wired zone terminals (terminals 8

through 20). See the Summary of Connections chagrdm .

2. Connect closed circuit devices in series in the high (+) side the loop. The

EOL resistor must be connected in series with the devices, following the

last device. See the Summary of Comections diagram.

3. Connect open circuit devices in parallel across the loop. The 2,000 ohm

EOLR must be connected across the loop wires at the last device.

High Resistan

ce Supervision on Hard-WA Zones 2-S

“ Special supervision in the control senses high resistance on hard-wired

zone loops 2-8, causing a warning “CHECK” display with the tiected zone

number to occur when the system is in the disarmed state. The system

cannot be armed when this display is present. If the system is in the

armed state when the high resistance condition occurs, no display will take

place until the system is disarmed.

Wfig 2-Wti Smoke Detectors To Zone 1

1. Connect 2-wire smoke detectors across zone 1 terminals 8 (+) and 9 (-).

Observe proper polarity when connecting the detectors (see Figure 7).

2. If an EOL resistor is presently connected across zone 1 terminals, remove

it. The EOL resistor must be connected across the loop wires at the

last detector.

3. See “Programming Hard-Wired Zones” later in this section for a detailed

programming procedure.

Teri&’ Operation of

The control panel will “verify” any alarm by resetting the smoke detectors

2-Wire Smoke Detectors

after the first alarm trigger, and then waiting 90 seconds for a second alarm

in Zone 1

trigger. If the smoke detector or thermostat does not trigger again, the

control will disregard the first trigger, and no alarm signal will occur. This

feature eliminates false alarms due to electrical or physical transients. The

ver@ feature is available on zone 1 only.

This feature is available only on units that report to the downloader

as Rev 4 or higher.

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ADEMCO Vista-20HW Troubleshooting Guide Page 21

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