Kidde Fire Systems Surge Protector P/N 81-CO2MAN-001 Manuel D’Utilisation
Design
P/N 81-CO2MAN-001
3-73
September 2013
As an alternative to the above limits for the 108 cu. in. nitrogen cylinder, the 1040 cu. in.
nitrogen cylinder may also be used for direct operation of CO2 cylinders and stop valves. The
1040 cu. in. nitrogen cylinder cannot be used to drive the nitrogen operated discharge delay
unit. Therefore, the 1040 cu. in. nitrogen cylinder may be employed upstream of a 108 cu. in.
nitrogen cylinder or downstream of the discharge delay unit. A maximum actuation line length
of 460-ft is allowed between the 1040 cu. in. nitrogen cylinder and all of the downstream
pressure operated control heads. Either schedule 80 stainless steel pipe or 5/16" x 0.032 wall
stainless steel tubing may be used for the entire actuation line. Also in this arrangement, the
1040 cu. in. nitrogen cylinder assembly can actuate up to three additional nitrogen cylinders,
which will be used to drive nitrogen pressure operated sirens. When actuating siren driver
cylinders, a maximum actuation line length of 90-ft is allowed. This length is in addition to the
460-ft maximum allowed length between the pilot cylinder and the discharge delay. When the
length between the pilot cylinder and discharge delay is less than 460-ft, the resulting
difference may be added to the 90-ft actuation line length to the siren driver cylinders.
3-13.4.5.2 Nitrogen Actuation with In-Line Discharge Delay
When using a nitrogen operated discharge delay unit, the 108 cu. in. nitrogen cylinder
assembly shall be used to supply nitrogen to the delay unit. Either ¼" schedule 80 stainless
steel pipe or 5/16" x 0.032 wall stainless steel tubing may be used for the entire actuation line.
No more than 4-ft of actuation line length can be used to connect the nitrogen cylinder to the
discharge delay unit. A maximum actuation line length of 225-ft may be used from the outlet
of the discharge delay to all of the downstream pressure operated control heads. Also in this
arrangement, the 108 cu. in. nitrogen cylinder assembly can actuate up to a pair of additional
nitrogen cylinders, which will be used to drive the nitrogen pressure operated siren. When
actuating siren driver cylinders, a maximum actuation line length of 20-ft is allowed. This
length is in addition to the 4-ft maximum allowed length between the pilot cylinder and the
discharge delay. When the length between the pilot cylinder and discharge delay is less than
4-ft, the resulting difference may be added to the 20-ft actuation line length to the siren driver
cylinders. Refer to Figure 3-12 for a typical acuation arrangement utilizing an in-line discharge
delay.
Table 3-13. Nitrogen Pilot Line Length Limitations
Pipe or Tubing
Maximum Linear Distance Permitted
Between N
2
and CO
2
Cylinders
1/4-inch (DN6) NPT Schedule 40
Galvanized Steel Pipe
300 ft. (91.44 m)
1/4-inch (DN6) NPT Schedule 80
Galvanized Steel Pipe
436 ft. (132.89 m)
1/4-inch (4mm) OD x 0.035 in. (1mm)
Wall Thickness Stainless Steel Tubing
Wall Thickness Stainless Steel Tubing
427 ft. (130.14 m)
5/16 in. OD x 0.032 wall
436 ft. (132.89 m)