MIL-HDBK-1027/4A
a) Pool/Training. Dehumidifiers should be controlled to maintain
relative humidity of the pool enclosure air between 50% and 60%. Relative
humidities lower than 50% are undesirable because of the evaporative cooling
effect on students coming out of the pool and because of the increased pool
evaporation rate. Relative humidities above 60% enhance the chances for
architectural and structural damage due to condensation and corrosion
problems. Relative humidity levels in excess of 60% also create moisture
levels conducive to the growth of mold and mildew.
b) Equipment Drying and Storage.
Control humidity to facilitate
gear/equipment drying.
5.2.6.7
Noise. High noise levels in the pool area prevent adequate
instruction. Comply with Army TM5-805-4 where spaces and/or sensitive
equipment cannot tolerate noise and/or vibration.
5.2.7
Plumbing
5.2.7.1
Pool Water Treatment, Recirculation, and Filtration. Each
individual pool should have its own water treatment and filtration system
which is operational at all times during recirculation operation.
a) Water Supply (Pool Fill and Water Makeup). Direct connection
between the water supply and the pool is prohibited. The water supply line
should supply the surge or balance tank, terminating at least 6 inches above
the water level. Automatic pool water makeup should be provided by
maintaining the water level in the tank at the same elevation as the pool
flow line. A backflow preventer should be provided in the tank's supply
water line.
b) Overflow. A surge tank should be provided to accommodate
overflow resulting from water displacement during periods of heavy pool
population. The tank must be designed to handle the combined surge capacity
of pool occupants and their equipment, plus 5%. Main drains and overflow
from the perimeter overflow system should return to the balance or surge
tank. No pool deck water should return to the recirculation system. Pool
deck drainage should be discharged to an approved waste system.
c) Recirculation. A recirculation system should be provided
complete with recirculation pumps, filters, disinfecting and other water
conditioning equipment. The capacity of the recirculation system should
produce a complete turnover of the entire pool's volume in six hours. See
the Facility Plate entitled Typical Piping Diagram.
1) Pump. Recirculation pump should be of corrosion-resistant
materials. Provide a corrosion-resistant hair and lint strainer at the inlet
of the circulating pump.
2) Piping. The recirculation system should be designed for a
maximum velocity of 6 feet per second in mains and branches.
3) Valves. Recirculation valves should be labeled for normal
and backwash positions. Valves should be butterfly or ball type for two
position operation. A balancing valve should be installed in pump discharge
161
Previous Page
