Specs

Bridgestone Retail Operations, LLC
PROJECT MANUAL
Version: January 2012
SECTION 13850
GAS DETECTION AND ALARM
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Remote CO Sensors.
B. CO System Controller.
1.02 RELATED SECTIONS
A. Sheet M-1 of the construction documents
B. Sheet E-2 of the construction documents
1.03 REFERENCES
A. NFPA 30A, Section 7.4.7 Gas Detection System
B. UL - Underwriters Laboratory.
1.04 SYSTEM DESCRIPTION
A. General Description:
1. CO Sensor:
a. Provide a remote CO sensor as located on the drawings. The remote CO
sensors shall utilize a solid state sensing element, be microprocessor
based and be both temperature and humidity compensated for long life
and stability. Pilot lights or LED’S (light emitting diodes) shall indicate
1. Unit normal operation/NOT in alarm.
2. High CO/unit in alarm, and
3. shall indicate unit malfunction.
b. In the unit malfunction condition the sensors output shall be fail-safe and
indicate steady high CO condition.
c. The CO sensor range shall be 0 to 250 ppm and shall be calibrated with
a CO test gas and be calibrated to initiate exhaust fan operations at 50
ppm of CO concentration.
2. CO System Controller
a. The CO system controller shall monitor its remote sensor. When a CO
alarm level is detected the controller shall delay exhaust fan contact
closure for 30 seconds. If the high CO conditioned persists for more than
30 seconds the exhaust fan contacts shall close. The minimum fan ON
time shall be field settable from one to eight minutes, in one minute
increments. Should the CO concentration remain above the alarm level
after the minimum run time has timed out, the exhaust fan contacts shall
remain closed (ON) and a second "alarm" set of contacts shall close.
Automatically increase fan speed to meet increasing heating or cooling
demands and to reset the room set temperature when the room
becomes unoccupied.
GAS DETECTION AND ALARM 13850- PAGE 1 OF 5