**February 16, 1998**

**Addendum #6**

**Contract \# TW-0928**

**SPECIAL SPECIFICATION**

**SECTION 16621-S**

**[PACKAGED ENGINE GENERATORS]{.underline}**

[Page]{.underline}

[PART 1 - GENERAL]{.underline}

1.01 Related Documents 3

1.02 Summary 3

1.03 Definitions 3

1.04 Generator-Set Performance, Nominal 4

1.05 Submittals 5

1.06 Quality Assurance 6

1.07 Delivery, Storage, and Handling 7

1.08 Warranty 7

1.09 Maintenance Service 7

1.10 Extra Materials 7

[PART 2 - PRODUCTS]{.underline}

2.01 Manufacturers 8

2.02 Service Conditions 8

2.03 Engine Generator 8

2.04 Engine 9

2.05 Governor 10

2.06 Engine Cooling System 10

2.07 Fuel Supply System 11

2.08 Engine Exhaust System 12

2.09 Combustion Air-Intake System 12

2.10 Starting System 12

2.11 Control and Monitoring 13

2.12 Generator, Exciter, and Voltage Regulator 15

2.13 Load Bank 16

2.14 Outdoor Generator-Set Enclosure 17

2.15 Finishes 18

2.16 Source Quality Control 18

[PART 3 - EXECUTION]{.underline}

3.01 Installation 19

3.02 Identification 20

3.03 Field Quality Control 20

3.04 Cleaning 21

3.05 Demonstration 21

3.06 Commissioning 21

**SPECIAL SPECIFICATION**

**SECTION 16621-S**

**[PACKAGED ENGINE GENERATORS]{.underline}**

[PART 1 - GENERAL]{.underline}

1.01 [RELATED DOCUMENTS]{.underline}

A. Drawings and general provisions of the Contract, including General
and Supplementary Conditions and Division 1 Specification Sections,
apply to this Section.

1.02 [SUMMARY]{.underline}

A. This Section includes packaged engine generator sets with the
following features and accessories:

1\. Battery charger.

2\. Day tank.

3\. Base-mounted fuel tank

4\. Engine generator set.

5\. Muffler.

6\. Outdoor enclosure.

7\. Remote annunciator.

8\. Remote stop switch.

9\. Starting battery.

10\. Load bank.

11\. Load-bank remote-control panel.

B. Related Sections include the following:

1\. Division 16 Section \"Transfer Switches\" for transfer switches,
including sensors and relays to initiate automatic-starting and
-stopping signals for engine generator sets.

1.03 [DEFINITIONS]{.underline}

A. Operational Bandwidth: The total variation from the lowest to the
highest value of a parameter over the range of conditions indicated,
expressed as a percentage of the nominal value of the parameter.

B. Power Output Rating: Gross electrical power output of generator set
minus total power requirements of electric motor-driven cooling fan and
pump.

C. Steady-State Voltage Modulation: The uniform cyclical variation of
voltage within the operational bandwidth, expressed in Hz or cycles per
second.

1.04 [GENERATOR-SET PERFORMANCE, NOMINAL]{.underline}

A. Steady-State Voltage Operational Bandwidth: 4 percent of rated output
voltage from no load to full load.

B. Steady-State Voltage Modulation Frequency: Less than one Hz.

C. Transient Voltage Performance: Not more than 10 percent variation for
50 percent step-load increase or decrease. Voltage recovers to remain
within the steady-state operating band within 4 seconds.

D. Steady-State Frequency Operational Bandwidth: 0.5 percent of rated
frequency from no load to full load.

E. Steady-State Frequency Stability: When system is operating at any
constant load within the rated load, there are no random speed
variations outside the steady-state operational band and no hunting or
surging of speed.

F. Transient Frequency Performance: Less than 5% frequency variation for
a 50 percent step-load increase or decrease. Frequency recovers to
remain within the steady-state operating band within 4 seconds.

G. Output Waveform: At no load, harmonic content measured line-to-line
or line-to-neutral does not exceed 5 percent total and 3 percent for
single harmonics. The telephone influence factor, determined according
to NEMA MG 1, does not exceed 50.

H. Sustained Short-Circuit Current: For a 3-phase, bolted short circuit
at the system output terminals, the system will supply a minimum of 250
percent of rated full-load current for not less than 10 seconds and then
clear the fault automatically, without damage to any generator system
component.

I. Temperature Rise of Generator: Within limits permitted by NEMA MG 1
when operating continuously at full-rated load, including 2 hours per 24
hours at 110 percent of rated capacity.

J. Starting Time: Maximum total time period for a cold start, with
ambient temperature at the low end of the specified range, is 8 seconds.
Time period includes output voltage and frequency settlement within
specified steady-state bands.

1.05 [SUBMITTALS]{.underline}

A. Product Data: For each component. Include data on features,
components, ratings, and performance. Include dimensioned outline plan
and elevation drawings of engine generator set and other system
components.

B. Shop Drawings: Show details of fabrication, piping, wiring, and
installation of field-installed portions of system. Include general
arrangement drawings showing locations of auxiliary components in
relation to engine generator set and duct, piping, and wiring
connections between generator set and auxiliary equipment. Show
connections, mounting, and support provisions and access and workspace
requirements.

1\. Wiring Diagrams: Show details of power and control connections and
differentiating between factory-installed and field-installed wiring.

C. Qualification Data: For firms and persons specified in the \"Quality
Assurance\" Article.

D. Field Test and Observation Reports: Indicate and interpret test
results for compliance with performance requirements.

E. Certified summary of prototype-unit test report.

F. Certified Test Reports of Components and Accessories: For devices
that are equivalent, but not identical, to those tested on prototype
unit.

G. Exhaust Emissions Test Report: To show compliance with applicable
regulations.

H. Sound measurement test report.

I. Certification of Torsional Vibration Compatibility: Comply with
NFPA 110.

J. Field test report of tests specified in Part 3.

K. Maintenance data for system and components to include in the
maintenance manuals. Include the following:

1\. List of tools and replacement items recommended to be stored at the
site for ready access. Include part and drawing numbers, current unit
prices, and source of supply.

2\. Detail operating instructions for both normal and abnormal
conditions.

L. Submit on the above per requirements of section 1300-S.

1.06 [QUALITY ASSURANCE]{.underline}

A. Manufacturer Qualifications: Engage a firm experienced in
manufacturing equipment of types and capacities similar to those
indicated for this Project and with a service center maintained by
engine generator set manufacturer capable of providing training, parts,
and emergency maintenance and repairs at the Project site with 4 hours\'
maximum response time.

B. Testing Agency Qualifications: An independent testing agency with the
experience and capability to conduct testing indicated with delaying the
Work as evaluated according to criteria contained in ASTM E 699.

C. Source Limitations: Obtain engine generator set and auxiliary
components from a single manufacturer with responsibility for entire
system. Furnish a representative product built from components that have
proven reliable and compatible with each other and are coordinated to
operate as a unit as evidenced by records of prototype testing.

D. Listing and Labeling: Provide system components of types and ratings
for which listing or labeling service is established and components
specified in this Section that are listed and labeled.

1\. The Terms \"Listed\" and \"Labeled\": As defined in the National
Electrical Code, Article 100.

2\. Listing and Labeling Agency Qualifications: A \"Nationally
Recognized Testing Laboratory\" as defined in OSHA Regulation 1910.7.

E. Comply with NFPA 70.

F. Comply with NFPA 99.

G. Comply with NFPA 110 requirements for a Level 2 emergency power
supply system.

1.07 [DELIVERY, STORAGE, AND HANDLING]{.underline}

A. Deliver engine generator set and system components to their final
locations in protective wrappings, containers, and other protection that
will exclude dirt and moisture and prevent damage from construction
operations. Remove protection only after equipment is safe from such
hazards.

1.08 [WARRANTY]{.underline}

A. General Warranty: The special warranty specified in this Article
shall not deprive the Owner of other rights the Owner may have under
other provisions of the Contract Documents and shall be in addition to,
and run concurrent with, other warranties made by the Contractor under
requirements of the Contract Documents.

B. Special Warranty: Submit a written warranty signed by Contractor and
manufacturer, with single-source responsibility for engine generator and
auxiliary components, agreeing to repair or replace items that do not
meet requirements or that deteriorate as defined in this Section within
the specified warranty period.

C. Warranty Period: 2 years from date of Substantial Completion.

1.09 [MAINTENANCE SERVICE]{.underline}

A. Maintenance: Beginning at Substantial Completion, provide 12 months\'
full maintenance by skilled employees of the manufacturer\'s designated
service organization. Include quarterly exercising to check for proper,
starting, load transfer, and running under load. Include routine
preventive maintenance as recommended by manufacturer and adjusting as
required for proper operation. Provide parts and supplies as used in the
manufacture and installation of original equipment.

1.10 [EXTRA MATERIALS]{.underline}

A. Furnish extra materials described below that match products
installed, are packaged with protective covering for storage, and are
identified with labels describing contents. Deliver extra materials to
Owner.

1\. Fuses: 1 for every 10 of each type and rating, but not less than 1
of each.

2\. Indicator Lamps: 2 for every 6 of each type used, but not less than
2 of each.

3\. Filters: One set each of lubricating oil, fuel, and combustion air
filters.

[PART 2 - PRODUCTS]{.underline}

2.01 [MANUFACTURERS]{.underline}

A. Available Manufacturers: Subject to compliance with requirements,
manufacturers offering products that may be incorporated into the Work
are the following:

1\. Caterpillar, Inc.; Engine Division.

2\. Detroit Diesel.

3\. Generac Corporation.

4\. Kohler Company; Generator Division.

5\. Onan Corporation; Industrial Business Group.

B. [Substitutions]{.underline}: only under provisions of Section 1600-S.

2.02 [SERVICE CONDITIONS]{.underline}

A. Environmental Conditions: Engine generator system withstands the
following environmental conditions without mechanical or electrical
damage or degradation of performance capability:

1\. Ambient Temperature: Minus 15 deg C to plus 40 deg C.

2\. Relatime Humidity: 0 to 95 percent.

3\. Altitude: Sea Level to 6000 feet (1800 m).

B. Unusual Service Conditions: Engine generator equipment and
installation is required to operate in the following conditions:

1\. Seismic risk zone 2 location as defined in the Uniform Building
Code.

2\. This unit will operate at 5600 feet altitude.

2.03 [ENGINE GENERATOR]{.underline}

A. Furnish a coordinated assembly of compatible components.

B. Ratings: 480V, 60 Hz, and power output ratings of system are as
indicated.

C. Output Connections: 3 phase, 4 wire.

D. Safety Standard: Comply with ASME B15.1.

E. Nameplates: Each major system component is equipped with a
conspicuous nameplate of component manufacturer. Nameplate identifies
manufacturer of origin and address, and model and serial number of item.

F. Resistance to Seismic Forces: Supports for internal and external
components, and fastenings for batteries, wiring, and piping are
designed to withstand static or anticipated seismic forces, or both, in
any direction. For each item, use a minimum force value equal to weight
of item.

G. Limiting dimensions indicated for system components are not exceeded.

H. Power Output Rating: Nominal ratings as indicated, with capacity as
required to operate as a unit as evidenced by records of prototype
testing.

I. Skid: Adequate strength and rigidity to maintain alignment of mounted
components without dependence on a concrete foundation. Skid is free
from sharp edges and corners. Lifting attachments are arranged to
facilitate lifting with slings without damaging any components. Refer to
section 2.7.C "Base Mounted Fuel Oil Tank".

J. Rigging Diagram: Inscribed on a metal plate permanently attached to
skid. Diagram indicates location and lifting capacity of each lifting
attachment and location of center of gravity.

2.04 [ENGINE]{.underline}

A. Comply with NFPA 37.

B. Fuel: Diesel fuel oil grade DF-2.

C. Maximum Engine Speed: 1800 rpm.

D. Maximum Piston Speed for 2-Cycle Engines: 1725 fpm (8.8 m/s).

E. Maximum Piston Speed for 4-Cycle Engines: 2250 fpm (11.4 m/s).

F. Lubrication System: Pressurized by a positive-displacement pump
driven from engine crankshaft. The following items are mounted on the
engine or skid:

1\. Filter and Strainer: Rated to remove 90 percent of particles 5
microns and smaller while passing full flow.

2\. Oil Cooler: Maintains lubricating oil at manufacturer\'s recommended
optimum temperature throughout 2 hours of operation of generator set at
110 percent of system power output rating.

3\. Thermostatic Control Valve: Controls flow in system to maintain
optimum oil temperature. Unit is capable of full flow and is designed to
be fail-safe.

4\. Crankcase Drain: Arranged for complete gravity drainage to an easily
removable container with no disassembly and without the use of pumps or
siphons or special tools or appliances.

G. Engine Fuel System: Comply with NFPA 30. System includes the
following:

1\. Integral Injection Pumps: Driven by engine camshaft. Pumps are
adjustable for timing and cylinder pressure balancing.

2\. Main Fuel Pump: Mounted on engine. Pump ensures adequate primary
fuel flow under starting and load conditions.

3\. Parallel Fuel Oil Filters: Ahead of injection pumps. Changeover
valves allow independent use of either filter.

4\. Relief/Bypass Valve: Automatically regulates pressure in fuel line
and returns excess fuel to source.

H. Jacket Coolant Heater: Electric-immersion type, factory installed in
jacket coolant system. Unit is rated and thermostatically controlled to
maintain an engine temperature of 25 deg C at the low end of the ambient
temperature range specified in \"Environmental Conditions\" Paragraph
above.

2.05 [GOVERNOR]{.underline}

A. Type: Electric isochronous with droop adjustment (0-10%) that
controls an engine-driven hydraulic activator.

B. Governor shall be similar to a Woodward 2301 Speed Control Governor.

2.06 [ENGINE COOLING SYSTEM]{.underline}

A. Description: Closed loop, liquid cooled, with radiator factory
mounted on engine generator-set skid and integral engine-driven coolant
pumping.

B. Radiator: Rated for specified coolant.

C. Coolant: Solution of 50 percent ethylene glycol and 50 percent water.

D. Expansion Tank: Constructed of welded steel plate and equipped with
gage glass and petcock. Capacity is as indicated.

E. Temperature Control: Self-contained, thermostatic-control valve
modulates coolant flow automatically to maintain optimum constant
coolant temperature as recommended by engine manufacturer. Features
include the following:

1\. Thermostatic Elements: Interchangeable and nonadjustable.

2\. Actuator Design: Normally open valves to return to open position
when actuator fails.

F. Coolant Hose: Flexible assembly with nonporous rubber inside surface
and aging, ultraviolet, and abrasion-resistant fabric outer covering.

1\. Rating: 50-psig (345-kPa) maximum working pressure with 180 deg F
(82 deg C) coolant, and noncollapsible under vacuum.

2\. End Fittings: Flanges or steel pipe nipples with clamps to suit
piping and equipment connections.

2.07 [FUEL SUPPLY SYSTEM]{.underline}

A. Comply with NFPA 30 and NFPA 37.

B. Base-Mounted Fuel Oil Tank: Factory-installed and -piped, listed and
labeled fuel oil tank. Features include the following:

1\. Tank level indicator.

2\. Capacity: 500 gallon.

3.  Vandal-resistant fill cap.

4.  Low-Level Alarm Sensor: Separate device operates alarm contacts at
    50 percent of normal fuel level

2.08 [ENGINE EXHAUST SYSTEM]{.underline}

A. Muffler: Industrial type, sized as recommended by engine
manufacturer. Measured sound level in the 20- to 75-Hz frequency band,
according to the Diesel Engine Manufacturers Association\'s \"DEMA Test
Code for the Measurement of Sound from Heavy-Duty Reciprocating
Engines\" at a distance of 25 feet (8 m) from the exhaust discharge, is
87 dBA or less.

B. Condensate Drain for Muffler: Schedule 40, black steel pipe connected
to muffler drain outlet through a petcock.

C. Connections from Engine to Exhaust System: Flexible section of
corrugated stainless-steel pipe.

D. Connection from Exhaust Pipe to Muffler: Stainless-steel expansion
joint with liners.

2.09 [COMBUSTION AIR-INTAKE SYSTEM]{.underline}

A. Air-Intake Silencer: Filter type providing filtration as recommended
by engine manufacturer.

1\. Sound level emanating from air intake measured as specified in the
Diesel Engine Manufacturers Association\'s \"DEMA Test Code for the
Measurement of Sound from Heavy-Duty Reciprocating Engines\" at a
distance of 25 feet (8 m) is 54 dBA or less in the 1200- to 4800-Hz
frequency band and 56 dBA or less in the 4800- to 10,000-Hz band.

2\. Mounting: Factory installed on engine generator set at a location
readily accessible for servicing.

2.10 [STARTING SYSTEM]{.underline}

A. Description: 24-V electric, with negative ground and including the
following items:

1\. Components: Sized so they will not be damaged during a full
engine-cranking cycle with ambient temperature at maximum specified in
\"Environmental Conditions\" Paragraph above.

2\. Cranking Motor: Heavy-duty unit that automatically engages and
releases from engine flywheel without binding.

3\. Cranking Cycle: As required by NFPA 110 for system level specified.

4\. Battery complies with SAE J537 and has adequate capacity within
ambient temperature range specified in \"Environmental Conditions\"
Paragraph above to provide specified cranking cycle at least twice
without recharging.

5\. Battery Cable: Size as recommended by generator set manufacturer for
cable length indicated. Include required interconnecting conductors and
connection accessories.

6\. Battery Compartment: Factory fabricated of metal with acid-resistant
finish and thermal insulation. Thermostatically controlled heater is
arranged to maintain battery above 10 deg C regardless of external
ambient temperature within range specified in \"Environmental
Conditions\" Paragraph above. Include accessories required to support
and fasten batteries in place.

7\. Battery-Charging Alternator: Factory mounted on engine with
solid-state voltage-regulation and 35-A minimum continuous rating.

8\. Battery Charger: Current-limiting, automatic-equalizing and
float-charging type. Unit complies with UL 508 and includes the
following features:

a\. Operation: Equalizing-charging rate of 10 A is initiated
automatically after battery has lost charge until an adjustable
equalizing voltage is achieved at battery terminals. Unit then
automatically switches to a lower float-charging mode and continues
operating in that mode until battery is discharged again.

b\. Automatic Temperature Compensation: Adjusts float and equalizes
voltages for variations in ambient temperature from minus 40 deg C to
plus 60 deg C to prevent overcharging at high temperatures and
undercharging at low temperatures.

c\. Automatic Voltage Regulation: Maintains output voltage constant
regardless of input voltage variations up to plus or minus 10 percent.

d\. Ammeter and Voltmeter: Flush mounted in door. Meters indicate
charging rates.

e\. Safety Functions: Include sensing of abnormally low battery voltage
arranged to close contacts providing low battery voltage indication on
control and monitoring panel. Also include sensing of high battery
voltage and loss of ac input or dc output of battery charger. Either of
these conditions closes contacts that provide a battery charger
malfunction indication at system control and monitoring panel.

f\. Enclosure and Mounting: NEMA 250, Type 1, wall-mounted cabinet.

2.11 [CONTROL AND MONITORING]{.underline}

A. Functional Description: When the mode-selector switch on the control
and monitoring panel is in the automatic position, remote-control
contacts in one or more separate automatic-transfer switches initiate
starting and stopping of the generator set. When the mode-selector
switch is switched to the on position, the generator set manually
starts. The off position of the same switch initiates generator-set
shutdown. When the generator set is running, specified system or
equipment failures or derangements automatically shut down the generator
set and initiate alarms. Operation of a remote emergency-stop switch
also shuts down the generator set.

B. Configuration: Operating and safety indications, protective devices,
basic system controls, and engine gages are grouped on a common control
and monitoring panel mounted on the generator set. Mounting method
isolates the control panel from generator-set vibration.

C. Configuration: Operating and safety indications, protective devices,
basic system controls, engine gages, instrument transformers, generator
circuit breaker, and other indicated components are grouped in a
combination control and power panel. Control and monitoring section of
panel is isolated from power sections by steel barriers. Panel features
include the following:

1\. Shunt Trip Device: For generator circuit breaker, connected to trip
circuit breaker when generator set is shut down by protective devices.

2\. Current and Potential Transformers: Instrument accuracy class.

D. Indicating and Protective Devices, and Controls: Include those
required by NFPA 110 for a Level 2 system, plus the following:

1\. Ac voltmeter.

2\. Ac ammeter.

3\. Ac frequency meter.

4\. Dc voltmeter (alternator battery charging).

5\. Engine-coolant temperature gage.

6\. Engine lubricating-oil pressure gage.

7\. Running-time meter.

8\. Ammeter-voltmeter, phase-selector switch or switches.

9\. Generator-voltage adjusting rheostat.

10\. Start-stop switch.

11\. Overspeed shutdown device.

12\. Coolant high-temperature shutdown device.

13\. Coolant low-level shutdown device.

14\. Oil low-pressure shutdown device.

15\. Fuel tank derangement alarm.

16\. Fuel tank high-level shutdown of fuel supply alarm.

E. Supporting Items: Include sensors, transducers, terminals, relays,
and other devices, and wiring required to support specified items.
Locate sensors and other supporting items on engine, generator, or
elsewhere to suit manufacturer\'s standard.

F. Connection to Data Link: A separate terminal block, factory wired to
Form C dry contacts, for each alarm and status indication is reserved
for connections for data link transmission of indications to remote data
terminals. Data system connections to terminals are covered in another
Section.

G. Common Remote Audible Alarm: Signal the occurrence of any of the
events listed below without differentiating between different event
types. Locate audible device and silencing means where indicated.
Connect so that after an alarm is silenced, clearing of initiating
condition will reactivate alarm until silencing switch is reset.

1\. Engine high-temperature shutdown.

2\. Lube-oil low-pressure shutdown.

3\. Overspeed shutdown.

4\. Remote emergency-stop shutdown.

5\. Engine high-temperature prealarm.

6\. Lube-oil low-pressure prealarm.

7\. Fuel tank low level.

8\. Overcrank shutdown.

9\. Coolant low-temperature alarm.

10\. Control switch not in auto position.

11\. Battery-charger malfunction alarm.

12\. Battery low-voltage alarm.

H. Remote Emergency-Stop Switch: Surface wall-mounted, unless otherwise
indicated and prominently labeled. Push button is protected from
accidental operation.

2.12 [GENERATOR, EXCITER, AND VOLTAGE REGULATOR]{.underline}

A. Comply with NEMA MG 1 and specified performance requirements.

B. Drive: Generator shaft is directly connected to engine shaft. Exciter
is rotated integrally with generator rotor.

C. Electrical Insulation: Class H or Class F.

D. Stator-Winding Leads: Brought out to terminal box to permit future
reconnection for other voltages if required.

E. Construction prevents mechanical, electrical, and thermal damage due
to vibration, overspeed up to 125 percent of rating, and heat during
operation at 110 percent of rated capacity.

F. Excitation uses no slip or collector rings, or brushes, and is
arranged to sustain generator output under short-circuit conditions as
specified.

G. Enclosure: Dripproof.

H. Instrument Transformers: Mounted within generator enclosure.

I. Voltage Regulator: Solid-state type, separate from exciter, providing
performance as specified.

1\. Adjusting rheostat on control and monitoring panel provides plus or
minus 5 percent adjustment of output voltage operating band.

J. Strip Heater: Thermostatically controlled unit arranged to maintain
stator windings above dew point.

K. Subtransient Reactance: 20 percent, maximum.\"

.

2.13 [LOAD BANK]{.underline}

A. Description: Permanent, outdoor, weatherproof, remote-controlled,
forced-air-cooled, resistive/reactive unit. Configuration shall consist
of a single enclosure that contains both the resistive & reactive
sections. There shall be only a single power cable connection point from
the generator. The unit shall be capable of 3 phase balanced loading to
the generator set at 100 percent of rated capacity at 0.8 power factor.
Unit is capable of selective control of load in 25 percent steps with
minimum step changes of approximately 5 and 10 percent available. The
load adjustments shall be capable of independent control of the
resistive and reactive steps.

B. Load Elements: All elements are designed for repetitive on-off
cycling and are to be mounted in slide-out heater cases for
serviceability. Resistive load elements shall be fabricated of a
corrosion-resistant chromium alloy with ceramic and steel supports.
Reactive load elements will be copper coil, iron core, air gap,
non-saturating type..

C. Load-Bank Heat Dissipation: Integral fan with totally enclosed motor
provides uniform cooling airflow through load elements. Airflow and coil
operating current are such that, at maximum load, with ambient
temperature at the upper end of the specified range, load-bank elements
operate at not more than 50 percent of maximum continuous temperature
rating of the resistance wire.

D. Load Element Switching: Remote-controlled contactors switch groups of
load elements. Contactor coils are rated 120 V. Contactors are located
in a separate NEMA 250, Type 3R enclosure within the load-bank
enclosure, accessible from exterior through hinged doors with tumbler
locks.

E. Contactor Enclosures: Heated by thermostatically controlled strip
heaters to prevent condensation.

F. Load-Bank Enclosures: NEMA 250, Type 3R, conforming with NEMA ICS 6.
Louvers at cooling air intake and discharge openings prevent entry of
rain and snow. Openings for airflow are screened with 1/2-inch- (13-mm-)
square galvanized steel mesh.

G. Protective Devices: Power input circuits to load banks are fused, and
fuses are selected to coordinate with generator circuit breaker. Fuse
blocks are located in contactor enclosure. Cooling airflow and
overtemperature sensors automatically shut down and lock out load bank
until manually reset. Safety interlocks on access panels and doors
disconnect load power, control, and heater circuits. Fan motor is
separately protected by overload and short-circuit devices.
Short-circuit devices are noninterchangeable fuses with 200,000-A
interrupting capacity.

H. Remote-Control Panel: Separate from load bank in a NEMA 250, Type 3R
enclosure. Includes a control power switch and pilot light, and switches
controlling groups of load elements.

I. Control Sequence: Control panel may be preset for adjustable
single-step loading of generator during automatic exercising.

2.14 [OUTDOOR GENERATOR-SET ENCLOSURE]{.underline}

A. Description: Vandal-resistant, weatherproof steel housing, wind
resistant up to 100 mph (160 km/h). Multiple panels are lockable and
provide adequate access to components requiring maintenance. Panels are
removable by one person without tools. Instruments and control are
mounted within enclosure.

B. Muffler Location: External to enclosure.

C. Engine Cooling Airflow through Enclosure: Adequate to maintain
temperature rise of system components within required limits when unit
operates at 110 percent of rated load for 2 hours with ambient
temperature at the top of the range specified in system service
conditions.

D. Louvers: Fixed-engine cooling air inlet and discharge. Louvers
prevent entry of rain and snow.

E. Automatic Dampers: At engine cooling air inlet and discharge. Dampers
are closed to reduce enclosure heat loss in cold weather when unit is
not operating.

F. Interior Lights: With switch. Factory-wired vaporproof-type fixtures
within housing, arranged to illuminate controls and accessible interior.
Arrange for external circuit supply.

G. Convenience Outlets: Factory wired. Arrange for external circuit
supply.

2.15 [FINISHES]{.underline}

A. Outdoor Enclosures: Manufacturer\'s standard enamel over
corrosion-resistant pretreatment and compatible standard primer.

2.16 [SOURCE QUALITY CONTROL]{.underline}

A. Factory Tests: Include prototype testing and Project-specific
equipment testing (testing of equipment manufactured specifically for
this Project).

B. Prototype Testing: Performed on a separate engine generator set using
same engine model, constructed of identical or equivalent components and
equipped with identical or equivalent accessories.

1\. Tests: Conform to those required for Level 1 energy converters in
paragraphs 3.2.1, 3.2.1.1, and 3.2.1.2 of NFPA 110.

2\. Components and Accessories: Items furnished with installed unit that
are not identical to those on tested prototype have been tested to
demonstrate compatibility and reliability.

C. Project-Specific Equipment Tests: Factory test engine generator set
and other system components and accessories before shipment. Test items
individually and assembled and connected as a complete system the same
as specified in \"Field Quality Control\" Article below. Record and
report test data. Conform to the following:

1\. Test Equipment: Use instruments calibrated within the previous 12
months and with accuracy directly traceable to the National Institute of
Standards and Technology.

2\. Hydrostatic Test: Perform on radiator, heat exchanger, and engine
water jacket.

3\. Generator Tests: Comply with IEEE 115.

4\. Complete-System, Continuous-Operation Test: Include nonstop
operation for a minimum of 8 hours, including at least 1 hour each at
one-half, three-fourths, and full load, and 2 hours at 110 percent of
full load. If unit stops during the 8-hour test, repeat the complete
test. Record the following minimum data at start and end of each load
run, at 15-minute intervals between those times, and at 15-minute
intervals during balance of test:

a\. Fuel consumption.

b\. Exhaust temperature.

c\. Jacket water temperature.

d\. Lubricating oil temperature and pressure.

e\. Generator load current and voltage, each phase.

f\. Generator system gross and net output kW.

5\. Complete-System Performance Tests: Include the following to
demonstrate conformance to specified performance requirements:

a\. Single-step load pickup.

b\. Transient and steady-state governing.

c\. Transient and steady-state voltage performance.

d\. Safety shutdown devices.

6\. Observation of Test: Provide 14 days\' advance notice of continuous
operation and performance tests and opportunity for observation of test
by Owner\'s representatives.

7\. Report test results within 10 days of completion of test.

[PART 3 - EXECUTION]{.underline}

3.01 [INSTALLATION]{.underline}

A. Anchor generator set and other system components on concrete
housekeeping bases conforming to Division 3 Section \"Cast-in-Place
Concrete\" and as indicated. Provide anchorage according to
manufacturer\'s written instructions, unless otherwise indicated.

B. Maintain minimum workspace around components according to
manufacturer\'s Shop Drawings and National Electrical Code.

3.02 [IDENTIFICATION]{.underline}

A. Identify system components according to Division 15 Section
\"Mechanical Identification\" and Division 16 Section \"Electrical
Identification.\"

3.03 [FIELD QUALITY CONTROL]{.underline}

A. Manufacturer\'s Field Service: Provide services of a
factory-authorized service representative to supervise installation and
connection of unit and to report results in writing.

B. Supervised Adjusting and Pretesting: Under supervision of
factory-authorized service representative, pretest all system functions,
operations, and protective features. Provide all instruments and
equipment required for tests. Adjust to ensure operation is according to
Specifications. Load system using a variable resistive and reactive load
bank simulating kW, and power factor of loads for which unit is rated.

C. Tests: Engage an independent testing agency to perform tests on
completion of installation of system. Use instruments bearing records of
calibration within the last 12 months, traceable to National Institute
for Standards and Technology standards, and adequate for making positive
observation of test results. Include the following:

1\. InterNational Electrical Testing Association Tests: Perform each
visual and mechanical inspection and electrical and mechanical test
stated in InterNational Electrical Testing Association\'s NETA ATS for
emergency engine generator sets. Certify compliance with test
parameters.

2\. Battery Tests: Measure charging voltage and voltages between
available battery terminals for full-charging and float-charging
conditions. Check electrolyte level and specific gravity under both
conditions. Test for contact integrity of all connectors. Perform an
integrity load test and a capacity load test for the battery. Verify
acceptance of charge for each element of battery after discharge. Verify
measurements are within manufacturer\'s specifications.

3\. Battery-Charger Tests: Verify specified rates of charge for both
equalizing and float-charging conditions.

4\. System Integrity Tests: Methodically verify proper installation,
connection, and integrity of each element of engine generator system
before and during system operation. Check for air, exhaust, and fluid
leaks.

5\. Exhaust System Back-Pressure Test: Use a manometer with a scale
exceeding 40 inches (1000 mm) of water. Connect to exhaust line close to
engine exhaust manifold. Verify that back pressure at full-rated load is
within manufacturer\'s written allowable limits for the engine.

6\. Voltage and Frequency Transient Stability Tests: Use recording
oscilloscope to measure voltage and frequency transients for 50 and 100
percent step-load increases and decreases and verify that performance is
as specified.

7\. Harmonic-Content Tests: Measure harmonic content of output voltage
under 25 percent and at 100 percent of rated linear load. Verify that
harmonic content is within specified limits.

D. Retest: Correct deficiencies identified by tests and observations and
retest until specified requirements are met.

3.04 [CLEANING]{.underline}

A. Upon completion of installation, inspect system components. Remove
paint splatters and other spots, dirt, and debris. Touch up scratches
and mars of finish to match original finish. Clean components internally
using methods and materials recommended by manufacturer.

3.05 [DEMONSTRATION]{.underline}

A. Training: Engage a factory-authorized service representative to
demonstrate adjustment, operation, and maintenance of system and to
train Owner\'s maintenance personnel as specified below.

1\. Conduct a minimum of 8 hours of training.

2\. Schedule training with at least 7 days\' advance notice.

3.06 [COMMISSIONING]{.underline}

A. Battery Equalization: Equalize charging of battery cells according to
manufacturer\'s written instructions. Record individual cell voltages.

END OF SECTION