3.7.1.1
Water Sides Including Fittings and Accessories
Water sides shall be hydrostatically tested in accordance with the
requirements of ASME BPVC SEC I and ASME BPVC SEC VIII D1 as applicable.
The ASME stamp will be accepted as evidence of this test.
3.7.1.2
Generator Casing, Air Casings, and Ducts
Air casing and ducts exterior to the generators shall be tested
pneumatically at the maximum working pressure. The soap bubble or smoke
bomb method shall be used to verify tightness. Gas sides of the generators
normally operated under pressure shall be tested for tightness at 1-1/2
times the predicted operating pressure in the furnace at maximum predicted
output. For this test the generator shall be tightly sealed with a
suitable means to blank off all openings. Air shall be admitted to the
generator until the test pressure is reached and then shall be held. If in
a 10-minute period the pressure drop does not exceed 1.2 kPa 5 inches water
gauge, the casing shall be regarded as tight and accepted. Air pressure
and smoke bomb or comparative CO(2) readings shall be used for induced
draft generators.
3.7.1.3
Fuel Oil Test
After the system has been flushed and operationally tested, the underground
portion of the system shall be leak tested in accordance with Section 13202
FUEL STORAGE SYSTEMS.
3.7.1.4
Fuel Systems for Oil-Fired HTW Generators
The part of the preassembled fuel oil system that is furnished integrally
with the generator shall be tested hydrostatically at 1.5 times the maximum
operating pressure. The part of the preassembled gas system that is
furnished integrally with the generator shall be tested pneumatically at
operating pressure. The soap bubble test method shall be used to verify
tightness of the gas system.
3.7.2
Fire Safety for Oil-Fired HTW Generators
Test shall be conducted as necessary to determine compliance with the
applicable UL safety standards. The presence of the UL label may be
accepted as evidence of compliance in this respect.
3.7.2.1
Oil-Fired Generators
Oil-fired generators shall meet the test requirements of UL 726.
3.7.2.2
Oil Burners
Oil burners shall meet the test requirements of UL 296.
3.7.3
Capacity and Efficiency Tests
The capacity and efficiency at the specified capacity of the generator
shall be determined in accordance with the ASME PTC 4 for steam generating
units. The efficiency shall be determined by the direct input-output
method and shall be checked with the loss method computation. Test runs
shall be made at the maximum capacity for 4 hours; at the minimum capacity
and at 50 percent capacity for 2 hours each, respectively. Test reports
SECTION 15555A
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