not desired.
**************************************************************************
Modular boilers shall be of the [cast iron] [and] [condensing] type.
Modular boilers shall have the capability of independent operation. Upon
failure of any module, the remaining modules shall be capable of operating
at their designed capacity. The size of the individual modules shall be as
indicated.
2.1.6
Hot Water Heating Boilers
**************************************************************************
NOTE: Hot water heating boilers will operate at
pressures not over 1100 kPa (160 psi) and at
temperatures not above 120 degrees C (250 degrees F)
at or near the boiler outlet. If a pressure above
200 kPa (30 psi) is selected, the boiler may be
required to be manned 24 hours a day. Consult AR
420-49 for boiler attendance requirements. Fill in
blank spaces to define operating conditions, under
the listed subparagraphs which are not applicable to
the design. Indicate the elevation of the project
site and outdoor ambient air temperature range
expected at the project site. Site conditions
affect fan selection, boiler design, and stack
design. Select appropriate boiler types. Allow
adequate space around each boiler to permit
accessibility for operation, maintenance, and
service (including space for tube removal). A
minimum clearance of 1200 mm (4 feet) around the
boiler will be required unless modular boilers are
specified. Some modular boilers installations
require little or no room between the individual
boilers.
The designer should select the efficiency for the
desired type of boiler, unless a life cycle cost
analysis indicates that a change in equipment
efficiency is warranted. If the result of the life
cycle analysis recommends a higher efficiency, the
designer should consult multiple boiler
manufacturers to ensure that the desired efficiency
is available and modify the specification
accordingly.
**************************************************************************
The hot water heating boiler shall be capable of operating at the specified
maximum continuous capacity without damage or deterioration to the boiler,
its setting, firing equipment, or auxiliaries. The rated capacity shall be
the capacity at which the boiler will operate continuously while
maintaining at least the specified minimum efficiency. The boiler design
conditions shall be as follows:
a.
Boiler design pressure [200] [_____] kPa [30] [_____] psig.
b.
Operating pressure at boiler outlet [_____] kPa psig.
c.
Hot water temperature [70] [80] [_____] degrees C [160] [180]
[_____] degrees F.
SECTION 15569A
Page 19
Previous Page
