Specifications

6
Table 2 – Terminal Block Connections
Ter mi na l N o. Name Ter mi na l N o. Name
1 A U X ( --- ) 11 Not Used
2 Reset 12 M u l t i --- S h u t d o w n
3 SUPV Contact COM 13 SUPV Contact NO
4 Alarm Contact COM 14 SUPV Contact NC
5 Alarm Contact NO 15 REM Alarm LED Out
6 AUX 1 Contact COM 16 AUX 1 Contact NC
7 AUX 2 Contact NO 17 AUX 1 Contact NO
8 AUX 2 Contact NC 18 AUX 2 Contact COM
9 24V AC/DC In (+) 19 18 VDC Output (+)
10 24V AC/DC In (---) 20 1 8 V D C O u t p u t ( --- )
N AC Neutral T B 3 --- 1 Not Used
L AC Line T B 3 --- 2 Not Used
ADDITIONAL FUNCTIONS WITH
ROOFTOP UNITS
The factory installed smoke detectors are factory wired to
immediately shut down the unit upon an alarm trip. However, in
many situations, additional functions such as remote test stations,
remote indicators, and auxiliary relays are also desired or required
by code. These functions are easily supported by the factory
installed smoke detector; however, since they typically involve
incorporation with the building system and exact details are
frequently application specific, these additional functions must be
wiredinthefield.
As shown in Table 1, additional functionality includes but is not
limited to the functions below. Fig. 6-- 11 show typical wiring
integration to allow integration of the smoke detectors with various
other building systems. For the remote indication and/or test
station, the Remote Keyed Attenuator SD -- TRK4 (p/n
KA99ZT00)3 is recommended. See Fig. 9 and guide specification
section.
S Building alarm initiation
S Remote indicators
S Multiple fan shutdown
S Remote test station
S Auxiliary relays
The smoke detector system is also frequently desired to be
integrated into rooftop unit for the following functions:
S Smoke purge
S Pressurization
S Smoke Exhaust
These functions are typically only required after an alarm has been
initiated. They require integration with the unit economizer and/or
power exhaust and are typically activated at the specific request of
the fire department. See the applicable unit wiring diagrams for
guidance specifics on these functions with respect to the unit in
question.
Smoke Purge
Smoke Purge is the operation of the unit’s indoor fan to bring air in
the building and push air out the building, supplemented by a
Power Exhaust. Since the Outdoor Air (OA) damper blades and
the Return Air (RA) damper blades move in opposite directions,
this feature results in the OA dampers fully open and the RA
dampers fully shut.
Pressurization and Smoke Exhaust
Pressurization and Smoke Exhaust are typically used together
when there are multiple units on application. The Fire Marshall
places the rooftop unit for the affected zone in the Smoke Exhaust
mode and all others in the Pressurization mode, thus clearing the
smoke in the affected zone. Pressurization is the operation of the
unit’s indoor fan to create a positive pressure inside the building by
fully opening the OA dampers and turning on the indoor fan.
Since the OA damper blades and the RA damper blades move in
opposite directions, this feature results in the OA dampers fully
open and the RA dampers fully shut. Smoke Exhaust is very
similar to Smoke Purge, except that this function requires the
economizer OA dampers to be fully shut and the Power Exhaust to
be on. Since the OA damper blades and the RA damper blades
move in opposite directions (for Carrier economizers), this feature
results in the OA dampers fully shut and the RA dampers fully
open.
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