MIL-HDBK-1003/6
Telephones. Furnish telephone outlets in boiler control board
10.14.4
areas, pump rooms, offices and outside in fuel storage and handling areas.
Emergency Lighting. Provide dual headed battery operated emergency
10.14.5
lights at strategic operational locations such as panel boards, motor control
centers, monitoring stations, gauges, platforms, stairs, catwalks, etc.
Battery operated exit lights shall be installed indicating the direction
toward and above the exit door. Lighting to be installed in accordance with
MIL-HDBK-1004/4.
Standby Power Generation System. Standby electrical power
10.14.6
generation is required for all coal fired plants, in large oil- or gas-fired
plants or where continuous service is essential. In small oil- or gas-fired
plants where a short-term heat generation failure can be tolerated, standby
electrical power generation may not required. In this case a survey shall be
made to determine if the local electrical utility company can reliably supply
the facility's electrical needs. A determination shall be made as to whether
they can adequately provide power within the tolerable outage time of the
heating plant. If power cannot be reasonably expected within this time frame,
standby electrical power generation is required.
10.14.6.1 Type of Unit. Units below 25 kW can be air-cooled or water-cooled.
Units larger than 25 kW must be water-cooled with closed water systems. Fuel
consumption for an air cooled unit is approximately 20 percent more than for a
water cooled unit. Units shall be equipped with crankcase heaters and water
jacket heaters in cold climates.
10.14.6.2 Emergency Generator Fuel. Stock a four day supply of diesel oil.
This can be accomplished with a small tank (2-hour supply) near the engine and
a larger tank outside the building with means of automatically filling the
small tank. Indoor storage of fuel is limited to comply with the requirements
of the NFPA National Fire Codes. Propane gas can be used if justified.
Gasoline may only be used for portable emergency generators to be used
outdoors.
10.14.6.3 Installation. Install emergency generators in separate sound
attenuating room enclosure or building with adequate heating to prevent
condensation of moisture in room at freezing temperatures. Suggested minimum
room temperature is 55 degrees F (12.8 degrees C). Adequate forced
ventilation with motorized dampers shall limit temperatures of room to
reasonable working limits. Refer to para. 10.15.3. Ducting that is required
to prevent cold room temperatures when the unit is running shall be provided
along with motorized dampers controlled by engine temperature. All electrical
equipment in the room shall be connected to both normal and standby power.
10.14.6.4 Operation. In the event of a power failure, the emergency operator
shall automatically start and transfer load buses. Emergency lighting and
small equipment shall be automatically switched to the emergency generator.
Major equipment shall be sequenced or be on a timer to start or be manually
started from the control room. Plants too small for a control room can have
equipment automatically started or local manual start.
195
Previous Page
