21
Maintenance or Test
Recommended Interval
Reference
Functional test control circuits
3-6 years
NFPA 70B under specific
equipment and Appendix H
equipment and Appendix H
2
Carbon dioxide (CO
2
) systems provide fire suppression for generator and large motor
windings. These systems consist of CO
2
storage bottles or tanks, piping and valves,
and electrical control systems.
Caution: CO
2
is dangerous and costly to replace. Take care to
avoid inadvertent CO
2
discharge during maintenance and testing.
Note: Mechanical maintenance recommendations are included in this report
but may be moved to FIST Volume 4-1A, Maintenance Scheduling for
Mechanical Equipment, when that FIST volume is revised.
but may be moved to FIST Volume 4-1A, Maintenance Scheduling for
Mechanical Equipment, when that FIST volume is revised.
Maintenance or Test
Recommended Interval
Reference
Weigh CO
2
bottles
Semi-annually
FIST Volume 5-2,
6.4.3
6.4.3
Check electrical controls
Monthly
FIST Volume 5-2,
6.4.3
6.4.3
Operate routing valves
Annually and after painting
FIST Volume 5-2,
6.4.3
6.4.3
Overall CO
2
system functional test
Annually
FIST Volume 5-2,
6.4.3
6.4.3
Cylinder discharge and hydrostatic
test
test
12 years
Any discharged cylinder not
hydrostatically tested in past
5 years must be tested prior to
refill.
Any discharged cylinder not
hydrostatically tested in past
5 years must be tested prior to
refill.
FIST Volume 5-2,
6.4.3
6.4.3
Visually inspect and functional test
CO
CO
2
discharge warning beacons
Annually
NFPA 72. 7-3.1
NFPA 72 7-3.2
NFPA 72 7-3.2