TM 55-1930-209-14&P-16
CHAPTER 2 DECKHOUSE VENTILATION SYSTEM
Section I. Description and data
2-1
Description. The deckhouse is provided with fresh air circulation by manually operated hatches and electrically
driven fans Fresh air is supplied by opening 17 louvered hatches (Figure 2-1), 10 port and 7 starboard. (Doors may also
be opened ) Air circulation is increased by using six exhaust fans on the deckhouse top (Figure 2-2). These are
controlled by circuit breakers on power panel 2 (Figure 2-3) and motor controllers on port and starboard bulkheads in the
Reverse Osmosis Water Purification Unit (ROWPU) space. Fan motors and louvered hatches can be used in different
combinations to control air movement. The deckhouse ventilation system also includes electrical wiring, controls, and an
electrical emergency shutoff. Installation of this system is shown in drawings referenced in Appendix A Major
components are listed in Table 2-1.
2-2
Capabilities. This system provides sufficient change of air in the deckhouse to maintain safe working conditions
under normal operations 2-3 Performance characteristics. Each of the six exhaust fans on the deckhouse top moves air
at the rate of 14,000 cubic feet per minute (cfm) at 1/2-lnch static pressure.
2-4
Equipment specifications
a.
Watertight hatch
Manufacturer
Part No
CAGEC
Type
Clear opening
Coaming
Fasteners
Material
Quantity
b.
Louvers
Manufacturer
Part No
CAGEC
Type
Size:
Overall
Flange
Material
Quantity
c Hooded roof exhaust fan
Manufacturer
CAGEC
Part No.
Size
Type
Motor
Capacity
Finish
Quantity
Julius Mock and Sons, Inc
413-A-1
6U135
Watertight
18 in x 60 in
4in
Wing nuts
Steel
17
Arrow United Industries
FL-109
64787
Flange face, sightproof
18 in x 60 in x 4 in
3 1/2 In
Galvanized steel
17
Strobic Air Corporation
6M080
HD361 5SP4XY
36 in diameter
Hooded top discharge,
direct drive tube axial,
flanged bottom
5 hp, 440 Vac, 3 ph, 60 Hz,
1150 rpm
13,500 cfm at 0 75 in.
static pressure
Carboline zinc no. 11
B coat and 190 FD top
coat
6
2-1
