Air
Mechanical Specifications
RKNL-B Series
69
14. Smoke detectors:
a. Shall be a Four-Wire Controller and Detector.
b. Shall be environmental compensated with differential sensing for reliable, stable, and drift-free sensitivity.
c. Shall use magnet-activated test/reset sensor switches.
d. Shall have tool-less connection terminal access.
e. Shall have a recessed momentary switch for testing and resetting the detector.
f. Controller shall include:
i. One set of normally open alarm initiation contacts for connection to an initiating device circuit on a fire alarm control
panel
ii. Two Form-C auxiliary alarm relays for interface with rooftop unit or other equipment
iii. One Form-C supervision (trouble) relay to control the operation of the Trouble LED on a remote test/reset station
iv. Capable of direct connection to two individual detector modules.
v. Can be wired to up to 14 other duct smoke detectors for multiple fan shutdown applications.
15. Barometric relief
a. Shall include damper, seals, hard-ware, and hoods to relieve excess building pressure.
b. Damper shall gravity-close upon shutdown.
16. Time Guard
a. Shall prevent compressor short cycling by providing a 5-minute delay (±2 minutes) before restarting a compressor after
shutdown for any reason.
b. One device shall be required per compressor.
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