Adequately reinforce, skirt, and suitably design panel base to permit
anchoring to the floor or foundation.
][2.1.5.2
Control Panel Wiring and Piping
**************************************************************************
NOTE: Delete inapplicable paragraph(s).
**************************************************************************
Control panel shall be factory pre-wired in accordance with NFPA 70. Wire
shall be thermoplastic Type THW, THWN, XHHW, or UL approved for the
intended use, color or number coded, and run in plastic ducts to numbered
terminal blocks. Control circuits shall be separately fused with properly
rated cartridge type fuses. Power leads to and from magnetic starters and
contractors shall terminate at terminal blocks so that field wiring is
necessary only from terminal blocks to external equipment. Control leads
to and from external control devices shall terminate at separate terminal
blocks from power leads. Steam-, draft-, and air-operated devices shall be
factory piped to permanently affixed external connections. Pneumatic
signals shall be either 20 to 103 kPa (gage) 3 to 15 psig or 20 to 207 kPa
(gage) 3 to 30 psig. Piping connections to indicators shall be copper
tubing conforming to ASTM B 88M ASTM B 88. The boiler operating switch
shall be a dust-tight sealed snap-action type. The precision switches
shall have cadmium, silver, or platinum contacts, wiping action type, rated
at 10 amperes. Electrically or pneumatically tested, controls and
equipment shall be to simulate complete operational sequence.
]2.1.6
Hot Water Heater
**************************************************************************
NOTE: Hot water heaters are only used on boilers
operating at 103 kPa 15 psi or less.
**************************************************************************
[The] [Each] [Number [_____]] boiler shall be equipped with internal hot
water heating coils conforming to the ASME BPVC SEC VIII. Heaters shall
have gasketed cast iron or steel flange mountings and shall be designed,
fabricated, and tested to withstand 207 kPa (gage) 30 psig maximum working
pressure at 121 degrees C 250 degrees F. The heating coil shall be finned
tube type not less than 19 mm 3/4 inch outside diameter and shall be
constructed of seamless copper or copper alloy that meet the requirements
of [ASTM B 75M ASTM B 75,] [ASTM B 111/B 111M,] or [ASTM B 395/B 395M ASTM
B 395/B 395M]. The heating coil while submerged in water under pneumatic
pressure shall withstand 2068 kPa (gage) 300 psig. The pressure drop
through the coil at maximum temperature and draw rate shall not exceed 34
kPa (gage) 5 psig, unless otherwise indicated. The coils shall terminate
in threaded inlet and outlet connections on the exterior of the boiler and
shall be designed for the indicated temperature rise and maximum draw rate.
When applicable, provide instrumentation for metering hot water production
load on boiler.
2.1.7
Noise Levels
Noise measurements and exposure analyses should be conducted under the
overall supervision of an industrial hygienist or suitably qualified
medical officer from the Navy Regional Medical Center (NRMC). Safety
personnel, engineers and others who have been certified by the Chief,
Bureau of Medicine and Surgery (BUMED) also may supervise the work.
Exposure limits for potentially hazardous noise levels of 85 dBA,
SECTION 15516N
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