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Component Descriptions
P/N 81-CO2MAN-001 2-35 September 2013
Figure 2-39. Heat Collector
2-3.6.4 VENTS
One of the major factors that determines the response characteristics of a system utilizing heat
actuated detectors is the size of the vents in the pneumatic control heads. If the on-site
conditions change, the vents in the pneumatic control heads can be replaced to adjust to the
new site conditions.
The vent size is measured in terms of seconds, and the number of seconds indicates the time
required for venting two inches of water-column pressure. The larger the vent size, the more
sensitive the system will be to temperature changes in the protected area. The vent sizes
available are listed in Table 2-13.
Table 2-13. Vent Size
Part Number Vent Size
WK-802742-000 2
81-802743-000 3
WK-802745-000 5
WK-802746-000 10
16 in.
(406 mm)
1 in.
(25 mm)
MOUNTING SURFACE FOR
PNEUMATIC HEAT DETECTOR
(MOUNT IN CENTER)
16 in.
(406 mm)