TM 55-1930-209-14&P-16
CHAPTER 3 VOIDS VENTILATION SYSTEM
Section I. Description and Data
3-1 Description. The void areas are provided with forced fresh air ventilation by electrically driven fans. Two fans
mounted high on deckhouse port and starboard bulkheads (Figure 3-1) provide ventilation to eight void areas, void 1 In
bow, voids 2 port and starboard, voids 3 port and starboard, voids 4 port and starboard, and void 5 in stern. In addition,
two fans mounted In ducting at rear of ROWPU space (Figure 3-2) exhaust hot air from voids 4, which contain three
diesel generators Two louvered hatches with covers and ducting provide fresh air intake from the stern weatherdeck Into
voids 4 -one In port and the other In starboard The voids ventilation system also includes air ducts, electrical wiring,
controls, and both mechanical and electrical emergency shutoffs Installation of this system is shown In drawings
referenced in Appendix A Major components are listed in Table 3-1
3-2 Capabilities. This system provides sufficient change of air in the voids to maintain safe working conditions under
normal operations
3-3 Performance characteristics. Two fans mounted on port and starboard bulkheads each move air at the rate of
1887 cfm at 1/2 Inch static pressure Generator exhaust fans each move air from voids 4 at the rate of 8500 cfm at 1 06
inches static pressure
3-4 Equipment specifications
a.
Blower (horizontal installation on port/starboard bulkheads)
Manufacturer
American Davidson
CAGEC
07077
Part No.
S105MJ
Capacity
1887 cfm @ 1/2 In standard pressure
Motor
1 hp, 1140 rpm, 440 Vac, 3 ph,
60 Hz, clockwise rotation
Quantity
2
b.
Blower cover
Manufacturer
Juniper Elbow Company, Inc
CAGEC
97537
Part No.
Size 14
Type
Round, watertight
Clear opening
14-in diameter
Material
Steel
Quantity
2
c.
Ventilation valve (mechanical emergency shutoffs)
Manufacturer
Juniper Elbow Company, Inc.
CAGEC
97537
Part No
Size R6
Type
Watertight round
Size
6 in nominal
Material
Steel
Quantity
6
d.
Ventilation valve (mechanical emergency shutoff for void 5)
Manufacturer
Juniper Elbow Company, Inc.
CAGEC
97537
Part No
Size R10
Type
Watertight round
Size
10 In nominal
Material
Steel
Quantity
1
3-1
