Hardwire Zones; Double Balanced Zones; Zone Doubling; Smoke Detectors - ADEMCO VISTA-20P Installation And Setup Manual

Installation Instructions

Hardwire Zones

Normally Open Zones
1. Connect open circuit devices in parallel across the
loop, with the EOLR connected across the loop wires
at the last device.
2. Enable normally open/EOLR zones using Zone
Programming mode, "Hardwire Type" prompt.
Normally Closed Zones
1. Connect closed circuit devices in series in the high (+)
side of the loop, with the EOLR connected in series
following the last device.
2. Enable normally closed/EOLR zones using Zone
Programming mode, "Hardwire Type" prompt.
Double-Balanced (V20P only): Connections as shown
(resistors not provided).
IMPORTANT: Double-balanced zones provide zone tamper
protection, and should be used as burglary zones only. Do not
use double-balanced zones as fire zones.
Zone Doubling (V20P only): Connections as shown
(resistors not provided).
12 13
TAMPER
2k
CONTACTS
TAMPER
2k
CONTACTS
2k
2k
ZONE 3 ZONE 4

Double Balanced Zones

Smoke Detectors

2-Wire Smoke Detectors
1. Connect up to sixteen (10, if "clean me" option used)
2-wire smoke detectors across zone 1 terminals 8 (+)
and 9 (-) as shown in the Summary of Connections
diagram at the back this manual. Observe proper
polarity when connecting the detectors.
2. Connect EOL resistors across the loop wires at the
last detector.
4-Wire Smoke Detectors
3. Connect 4-wire smoke detectors to any zone from 2
and higher as shown below. This control does not
automatically reset power to 4-wire smoke detector
zones, so you must use a relay (4204, 4229, or
on-board trigger connected to separate relay) to reset
power. Do this by programming the designated
relay/trigger as zone type 54 (fire zone reset).
+ 5
AUX PWR
OUTPUT
_
4
TERMINALS
4-WIRE SMOKE
OR COMBUSTION
DETECTOR
TO ZONE TERM. ( ) +
_
TO ZONE TERM. ( )
Figure 7. 4-Wire Smoke Detector Connections
2-6
14
10
2k
ZONE 2
2k
ZONE 10

Zone Doubling

RELAY
PROGRAM RELAY
AS ZONE TYPE 54
(FIRE ZONE RESET)
_
BLK +
+
_
VIOLET
2000
OHMS
EOLR
HEAT
DETECTOR
Notes
• EOLR: If the EOLR is not at the end of the loop,
the zone is not properly supervised and the
system may not respond to an "open" on the zone.
• Zone 1 is intended for EOLR only.
U L
installations, use normally closed zones.
Zone Doubling (VISTA-20P only):
This feature provides two hardwired zones for each
standard hardwired zone connected to the control's
terminals (but does not increase the total number
of zones supported by the control). If enabled (Zone
Programming mode, "Hardwire Type" prompt,
option "3"), hardwire zones are automatically
paired as follows:
Zone
2
3
4
5
6
11
7
8
Note for Configurable Zone Types: A short
3k
across the EOL (i.e., at terminal) on either zone of
a zone-doubled pair or on a double-balanced zone
causes a tamper condition
6.2k
Notes
• Fire Verification (zone type 16): The control
panel will "verify" any alarm by resetting the
smoke detectors after the first alarm trigger, and
then waiting 90 seconds for a second alarm
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 zone 1 alarm current supports only one
smoke detector in the alarmed state.
•
Do not use 4-wire smoke detectors on zone 1.
• Clean Me Option: If enabled (field *174 = 1;
*56 zone programming, response time prompt =
3), certain ESL smoke detectors
reports as appropriate. If used, the maximum
number of detectors is reduced to 10 (not
standard 16).
RED
† Refer to the ESL documentation included with
EOL
the smoke detector for information regarding
POWER
SUPERVISION
RELAY MODULE
compatibility with the clean-me option.
A77-716B
4wiresmk-001-V0
For UL commercial burglar alarm
Paired with zone
10
11
12
13
14
15
16
.
†
send "clean me"