be less than indicated.
2.1.2.2
Motor Starters
**************************************************************************
NOTE: Where motor starters for mechanical equipment
are provided in motor control centers, delete the
reference to motor starters.
**************************************************************************
Where a motor starter is not shown in a motor control center on the
electrical drawings, a motor starter shall be provided. Where required,
motor starters shall be provided complete with properly sized thermal
overload protection and other equipment at the specified capacity,
including an allowable service factor and other appurtenances necessary for
the motor starter specified. Manual or automatic control and protective or
signal devices required for operation specified and any wiring required to
such devices not shown on the electrical drawings shall be provided. Where
two-speed or variable-speed motors are indicated, solid-state
variable-speed controllers may be provided to accomplish the same function.
2.1.3
Boiler Design Requirements
2.1.3.1
Radiant Heating
**************************************************************************
NOTE: The following is a guide to determine maximum
radiant heat release:
Boiler Type
Maximum kJ/sq meter
(Btuh/sq ft)
Controlled circulation
watertube boilers
1,419,500 (125,000)
watertube boilers
1,135,650 (100,000)
Firetube boilers
1,135,650 (100,000)
**************************************************************************
The maximum effective radiant heating surface shall be limited to [_____]
watt per square meter input Btu input per square foot per hour.
2.1.3.2
Heat Input
The maximum heat input per cubic meter cubic foot of furnace volume shall
be [931.5 Megajoules/cubic meter 25,000 Btu/cubic foot with spreader
stokers] [1.7 Gigajoules/cubic meter 45,000 Btu/cubic foot with underfeed
stokers].
2.1.3.3
Combustion Gas
The combustion gas temperature at the furnace exit shall be a minimum of 38
degrees C 100 degrees F less than the ash fusion softening temperature
(reducing atmosphere) of the coal specified.
SECTION 15559A
Page 19
Previous Page
