User's Manual

Design
September 2013 3-70 P/N 81-CO2MAN-001
3-13.3.3 EMERGENCY MANUAL
Emergency manual actuation is a system operation that requires human action and that is fully
mechanical in nature. All valves that control the release and distribution of carbon dioxide shall
be provided with an emergency manual control. The actuating device shall be easily accessible,
shall be located at or near the valve being controlled, and shall be clearly recognizable for the
purpose intended.
3-13.4 Control Systems
The hazard survey (See Paragraph 3-2) should be used to determine the most effective means
of actuating the system, based on the expected fire growth rate, personnel safety, process
characteristics, and other factors. The actuation system may incorporate one or more of the
methods described in Paragraph 3-13.4.1 through 3-13.4.5, dependent on the selected control
head(s). Table 3-11 summarizes the actuation methods featured on each control head.
Stackable control heads may be coupled with one other control head, subject to the limitations
in Paragraph 2-3.
3-13.4.1 LEVER OPERATED ACTUATION
Lever operated actuation uses a lever, located directly on the control head, to provide both
normal manual and emergency manual actuation at a valve.
3-13.4.2 CABLE OPERATED ACTUATION
Cable operated systems provide normal manual actuation by using a stainless steel cable to
transmit an actuating force from a pull station to a control head.
Table 3-11. Control Head Actuation Features
P/N Description
Actuation Features
Lever Cable Electric Pneumatic Pressure Stackable
WK-870652-000 Lever Operated X — — — — —
81-979469-000 Cable Operated X X — — —
WK-890181-000 Electric Operated, 24 VDC X — X — — —
81-895630-000 Electric & Cable
Operated, 24 VDC
XXX — — —
WK-897494-000 Electric & Cable
Operated, 24 VDC,
Explosion Proof
XXX — — —
81-872335-000 Pneumatic, 3 in. / 5 sec X X — X — —
81-872365-000 Pneumatic, 6 in. / 5 sec X X — X — —
81-872362-000 Pneumatic, 6 in. / 2 sec X X — X — —
81-892330-000 Pneumatic, 3 in. Tandem X X — X — —
81-872360-000 Pneumatic, 6 in. Tandem X X — X — —
82-878737-000 Pressure Operated — — — — X —
82-878751-000 Lever and Pressure
Operated
X—— — X —
82-878750-000 Stackable Pressure
Operated
——— — X X