Yonkers Middle High School, SED Control № 66-23-00-01-0-208-010, YPS № OB31
SECTION 16622 - EMERGENCY GENERATOR
PART 1 - GENERAL
1.1
1.2
GENERAL REQUIREMENTS
A.
This Section is to coordinate with and be complementary to the General Conditions and
Supplementary General Conditions of the Work, wherever applicable to Mechanical and Electrical
Work.
B.
Section 15000 - Special Requirements for Mechanical and Electrical Work shall apply.
C.
Section 16000 - General Provisions for Electrical Work shall apply.
DESCRIPTION OF WORK
A.
1.3
The work includes the providing of all labor, materials, equipment, accessories, services and tests
necessary to complete and make ready for operation by the Owner, a diesel engine generator set
complete with engine generator batteries, charger, silencer, (internal fuel oil tank and rupture
basin), automatic transfer switches, weatherproof sound enclosure, and all required appurtenances
and accessories. The authorized generator supplier shall provide all automatic transfer switches.
Refer to appropriate section of Specifications for additional requirements.
QUALITY ASSURANCE
A.
"Manufacturers" - Firms regularly engaged in manufacture of the type of equipment required for
the application, whose products have been in satisfactory use in similar service for not less than 10
years.
B.
Equipment shall be capable of continuous operation at rated output for the duration of any utility
power failure for approximately 48 hours at full load.
C.
The whole system (the engine, generator, and all major items of auxiliary equipment) shall be built,
tested, and shipped by the same manufacturer. Small factories that buy the engine, generator and
auxiliary equipment and then assemble them together relying on the equipment manufacturers for
their supply of spare parts and engineering expertise, and are subject to normal vendor
uncertainties contributing to product design fluctuations, do not meet the one source of supply
criteria of this Specification.
D.
To maintain environmental quality, the engine shall meet all local, federal and state regulations.
Verification of the ability to meet these emission specifications shall be available from the engine
manufacturer.
E.
The unit shall be shipped by the manufacturer to its authorized dealer having geographical
jurisdiction in the area that the job site is located. This dealer shall have a parts and service facility
located within a 50 mile radius of the Job Site. These facilities shall be stocked with adequate
parts and repair equipment to ensure a 24-hour on-call emergency service capability. Proof of
these capabilities shall be demonstrated (number of trucks, number of qualified servicemen,
inventory list, list of spare parts on hand for the particular model sold, etc.) to the Owner's
satisfaction.
F.
Rating of diesel electric set shall be based on operation of the set at rated generator RPM when
equipped with all necessary operating accessories such as air cleaners, radiator fan, lubricating oil
pump, fuel transfer pump, fuel injection pump, jacket water pump, governor alternating current
generator and exciter. All ratings must be factory certified or as published in the Diesel and Gas
Turbine Worldwide Catalog.
G.
The diesel engine-generator set shall be capable of producing the rated power at 0.8 power factor
continuously for standby power applications. The output voltage shall be @ 3-Phase, 4-Wire, 60
HZ. The KW and voltage rating for the generator at each school is indicated on the drawings.
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Emergency Generator
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H.
The diesel engine generator set shall comply with pertinent ANSI, ASTM, IEEE, NEMA, NFPA &
UL standards for construction and installation.
I.
The diesel engine should comply with EPA Tier 3 Emission standard.
J.
The generator installation shall comply with NFPA-110 EPSS Level 1, Class 48, Type 10
requirements.
K.
The generator shall be listed/labeled in accordance with UL 2200.
L.
Provide diesel generator set and all appurtenances produced by manufacturers listed as Approved
Manufacturers in this Section.
M.
Provide diesel generator set whose performance under specified conditions is certified by the
manufacturer.
N.
Generator Testing
1.
1.4
A certified test report showing serial number of the engine, generator and all accessories
furnished, and actual readings taken during a factory-conducted full load test including
the following:
a.
Cold start acceleration to rated voltage and frequency within 8 seconds.
b.
Full and partial load applications and rejections during the test (at least two per
hour). Frequency and voltage stability and transients shall not exceed the limits
specified herein.
c.
15 minutes 3 load, or function warm up, 2 hour 2 load, 2 hour : load and 2
hour full load; plus overloads (if specified herein).
d.
Demonstrate that all applicable safety shut-downs function along with their
respective audio and visual alarms.
SUBMITTALS
A.
Refer to Section 15000 Special Requirements for Mechanical and Electrical Work and submit shop
drawings. Shop drawings shall include the following:
1.
Drawing of the diesel generator set, including dimensioned layout on Architectural
background drawing.
2.
The following data in tabulated form:
a.
Make of engine.
b.
Number of cylinders.
c.
Bore, inches (millimeters).
d.
Stroke, inches (millimeters).
e.
Piston displacement, cubic inches (litres).
f.
Piston speed, feet per minute (litres/min.), at rated RPM.
g.
BMEP at rated KW output.
h.
Make and type of generator.
i.
Generator electrical rating, KVA or KW at .8 power factor.
j.
Number and type of bearings.
k.
Exciter type.
l.
Generator insulation class and temperature rise.
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1.5
m.
Parts and service support.
n.
Engine manufacturer's certified engine BHP curve and certified generator set
fuel consumption curve.
3.
Batteries and battery charger.
4.
Hospital-grade silencer.
5.
Catalytic converter (if deemed necessary to achieve Tier 3 emissions).
6.
Integral fuel tank and rupture basin.
7.
Cooling system complete.
8.
Exhaust system complete.
9.
All auxiliaries
GUARANTEE
A.
Refer to Section 15000 - Special Requirements for Mechanical and Electrical Work.
PART 2 - PRODUCTS
2.1
APPROVED MANUFACTURERS
A.
Emergency Generator
1.
2.
3.
Diesel Engine Generator Sets
a.
Caterpillar
b.
Detroit Diesel
c.
Cummins
Integral Fuel Tanks
a.
International Supply Co.
b.
Chillicothe Metal Co.
Governors
a.
4.
5.
Exhaust Silencers
a.
Maxim
b.
Nelson
Chargers
a.
6.
7.
8.
Woodward
La Marche
Batteries
a.
NIFE
b.
Caterpillar
Isolators
a.
ACE
b.
Korfund
Load Banks
a.
Avtron
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b.
9.
10.
11.
12.
2.2
Radiators
a.
Perfex
b.
IEA
c.
Young
Generators
a.
Century
b.
Ideal
c.
Kato
Regulators
a.
Basler SR8A
b.
CATERPILLAR #SR4
Enclosures
a.
International Supply Co.
b.
Chillicothe Metal Co.
GENERAL
A.
2.3
Simplex
The diesel generator set shall consist of a diesel engine coupled to a single bearing generator, all
mounted on a common base of fabricated structural steel. Operations shall be fully automatic upon
normal source power failure.
DIESEL ENGINE
A.
The engine shall be Tier 3 emission rated, watercooled, in-line or vee-type, two or four stroke
cycle, full compression ignition diesel. It shall meet specifications when operating on #2 diesel
fuel oil. The maximum output capacity shall not be less than BHP required to deliver KW rated
power at rated RPM, corrected to sea level barometric pressure (29.92 in HG) and 120 deg. F.
The engine shall not exceed 1800 RPM at normal full load operation. Provide catalytic converter
if necessary in order to achieve Tier 4 emissions rating.
B.
Frequency regulation shall be isochronous of rated speed for any load from open circuit to full
rated load. Provide isochronous electronic type governor, Woodward 2301. The governor shall
be fully hydraulic. Mechanical type governor with electronic actuators will not be acceptable. The
engine governor shall maintain isochronous frequency regulation from no load to full rated load.
Steady-state operating band shall be  0.25%. The governor shall be capable of remote speed
adjustment.
C.
Injection pumps and injection valves shall be of the type not requiring adjustment in service and
which shall be capable of quick replacement in a few minutes by ordinary mechanics without
special diesel experience. The engine shall have an individual mechanical injector for each
cylinder, any one of which may be removed and replaced from parts stock.
D.
Fuel lines between injection pumps and valves shall be of heavy seamless tubing to eliminate
irregularity of fuel injections and shall be of the same length for all cylinders, if necessary for the
engine operation.
E.
The fuel system shall be equipped with a fuel filter having replaceable elements which may be
easily removed from their housing for replacing without breaking any fuel line connections or
distributing the fuel pumps or any other part of the engine. All fuel filters shall be conveniently
located in one accessible housing, ahead of the injection pumps, so that the fuel will have been
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thoroughly filtered before it reaches the pumps. No screens or filters requiring cleaning or
replacement shall be used in the injection pump or injection assemblies. A factory installed fire
save valve (fusible link) shall be provided in the fuel supply line.
2.4
F.
The engine shall be equipped with a built-in, gear type, engine-driven fuel transfer pump, capable
of lifting fuel against a head of twelve feet for supplying fuel through the filters to the injection
pump, at constant pressure. The engine shall also be equipped with a fuel priming pump and a
gear driven water pump having the capability of pumping against a head pressure of 57 feet. An
engine mounted hydraulic fuel pressure gauge located between the fuel filter and the injection
pump shall be provided as an indication of a clogged filter, malfunctioning fuel injection pump or
system. The engine shall have replaceable induction-hardened full length wet cylinder liners, cast
iron heads and an engine block with a minimum tensile strength of 40,000 psi.
G.
The engine shall be provided with replaceable full length, wet type liners, induction hardened,
precision honed and chemically treated on the inside surface to obtain maximum life.
H.
The engine shall have a gear-type lubricating oil pump, for supplying oil under pressure to main
bearings, crank pin bearings, pistons, piston pins, timing gears, cam shaft bearings and valve
rocker mechanism. Effective lubricating oil filters shall be provided and so located and connected,
that lubricating oil is continuously filtered and cleaned. Filters shall be accessible, easily removed
and cleaned, and shall be equipped with a spring-loaded, bypass valve as an insurance against
stoppage of lubricating oil circulation in event the filters become clogged. The engine shall have a
suitable lubrication oil cooler, water-cooled, to insure proper performance and engine life.
I.
The engine shall be provided with one or more dry type air cleaners of sufficient capacity to
effectively protect the working parts of the engine, from dust and grit.
J.
The engine shall be provided with a set of flexible connections of the size, length and type
recommended by the engine manufacturer. Connections shall be provided for fuel intake, fuel
return, cooling water outlet, cooling water inlet, and exhaust.
K.
Supply initial charge of lubricating oil.
ENGINE STARTING SYSTEM
A.
The engine shall be equipped with a 24 Volt automatic electric starting system of sufficient
capacity to crank the engine at a speed which will allow for full diesel start of the engine. The
starting pinion shall be so arranged as to disengage automatically when the diesel engine starts.
Provide jacket water heaters of sufficient capacity to maintain jacket water at the proper
temperature (90 deg. F. in ambient temperature of -20 deg. F.) for quick emergency start if
required. The jacket water heaters shall be tank-type to insure proper thermal circulation.
Immersion heaters are not acceptable. The heater shall be rated 3000W at 208 Volts, single-phase
supplied from a normal power source. Each heater shall be provided with its own thermal box. A
storage battery shall be furnished having sufficient capacity for cranking the engine for at least 30
seconds at firing speed in an ambient of 30oF, with capacity for starting the diesel engine a
minimum of three times using approximately starting aids. Automatic controls shall be furnished
to provide automatic cranking of the diesel engine when failure of the normal power supply
actuates an initiating device. The equipment shall be designed to prevent excessive cranking with
possible damage to the cranking motor, in case the engine does not start. Automatic stop shall be
provided.
B.
Shall start the engine at any position of the flywheel.
C.
Electric cranking motor:
1.
Shall be engine-mounted.
2.
Shall crank the engine via a gear drive.
3.
Rating shall be adequate for cranking the cold engine at the voltage provided by the
battery system, and at the required RPM during five consecutive starting attempts of 10
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seconds cranking each at 10 second intervals, for a total of 50 seconds of actual cranking
without damage.
2.5
D.
A 24 Volt set of nickel cadmium batteries of required capacity in AMP/HRS, but not less than the
equivalent of 20 cells, shall be furnished for the proper starting of diesel engine under the specified
automatic starting conditions. Necessary intercell connectors, steel rack and connecting cables
shall be provided.
E.
A trickle charger shall be provided to automatically charge the set of engine starting batteries.
Charger shall employ transistor controlled magnetic amplifier circuits to provide continuous taper
charging. Charger shall include: Automatic AC line compensation, surge compressors, overload
protection and DC voltage regulation, silicon diode full-wave rectifier, power failure relay with
remote indication terminals, DC ammeter and voltmeter, fused AC input and DC output. DC
output shall be not less than 10 Amperes, DC voltage shall be 24 Volt, AC input shall be 120 V,
single-phase, 60 cycles. The battery charger shall be LaMarche Model A-11, or approved equal.
Supply a combination high/low voltage alarm when a remote annunciator is specified.
F.
Appropriate safety devices and automatic engine shutdown shall be provided for high water
temperature, low oil pressure, overspeed, and engine overcrank with individual visual indication
and reset mode. The overspeed shutdown shall be activated by an electronic overspeed sensing
module with a press to test-verify light to show proper functioning of the overspeed mode. All
necessary wiring from the engine sensing contactors, jacket water heaters, or switches shall be
properly tagged and brought out to a terminal block which will be located in a generator or engine
mounted junction box. Any wiring feeding across the generator housing shall be bundled together
and pulled through a length of sealtite the distance of the generator housing only.
CONTROL PANEL
A.
A generator control panel shall be furnished of the dead-front, fully enclosed (free standing, wall
mounted, generator mounted) type.
B.
A (free standing, wall mounted, generator mounted ) NEMA I type vibration isolated, dead front,
14 gauge control panel shall be provided. The panel shall be provided with a hinged front cover
with provisions for locking to prevent tampering of the controls by unauthorized personnel. The
face of panel shall also be hinged and gasketed and held in place by captive screws to enable easy
access into the panel itself for control wiring connections or repair work. The panel must be
designed in such a way as to readily accept control wiring conduit terminations and required wiring
without interfering with its proper functioning or vibration isolation design. The panel shall
contain, but not be limited to, the following equipment:
1.
Voltmeter, 3-1/2 inch, 2% accuracy.
2.
Ammeter, 3-1/2 inch 2% accuracy.
3.
Ammeter phase selector switch.
4.
Frequency meter, 3-1/2 inch, dial type.
5.
Automatic starting controls.
6.
Panel illumination lights and switch.
7.
Voltage level adjustment rheostat.
8.
Engine oil pressure gauge.
9.
Engine water temperature gauge.
10.
Dry contacts for the four safety shutdowns, individually wired to separate terminal strips
for remote indication of each individual alarm.
11.
Fault indicators (red lights) for low oil pressure, high water temperature, overspeed and
overcrank. Alarm lights to be of the "press to test" type.
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2.6
2.7
12.
Four position function switch marked "Auto," "Manual," "Off/Reset," and "Stop," with
necessary control relays, 30 seconds cranking limit control and circuits to shut down
engine in event of low lube oil pressure, high water temperature, overcrank and
overspeed.
13.
Indicating lamp to light when selector switch is in the "Off" position.
14.
Governor raise/lower switch.
15.
Clock indicating hours of operation.
16.
Alarm horn with on-off switch to sound on engine fault shutdown, indicating lamps to
illuminate on each of the aforementioned engine faults shutdown indications and
pre-alarm indications.
17.
Three sets of auxiliary contacts for louver control and other accessories.
18.
Pre-alarm module for low lube oil pressure shut-down, pre-low lube oil shutdown, high
water temperature shutdown, pre-high water temperature shutdown, overcrank shutdown,
overspeed shutdown, low jacket water temperature alarm, low fuel level alarm, low
battery voltage alarm generator set running and associated warning horns and lights in
conformance with NFPA 99 requirements. Provide connections from oil storage tank low
level switch, furnished with storage tank, to alarm pane.
19.
All required dry contacts for remote reporting of alarm on the remote annunciator panel.
20.
Integral fuel tank rupture basin alarm.
21.
All required dry contacts for remote reporting of alarms on the Building Management
System. Alarm includes generator running, malfunction, and low fuel.
MAIN LINE CIRCUIT BREAKERS
A.
Generator mounted main line circuit breakers shall be 4-wire and shall be installed as a load circuit
interrupting and protection devices. They shall operate both manually for normal switching
function and automatically during overload and short circuit conditions. The breakers shall be
installed in a NEMA 1 enclosure. Refer to the drawings for the breaker=s size and rating.
B.
The trip unit for each pole shall have elements providing inverse time delay during overload
conditions and instantaneous magnetic tripping for short circuit protection. The circuit breaker
shall meet standards established by Underwriters' Laboratories, National Electric Manufacturer's
Association, and National Electrical Code.
C.
For free standing panels a generator-mounted feeder terminal cabinet shall be provided with lugs
for cable connections. Cabinet shall be of adequate dimensions equipped with insulated stabs of
adequate capacity to accommodate the incoming and outgoing feeder cables.
D.
Gutter spaces shall be in accordance with NEC for all circuit breakers and junction boxes.
ANNUNCIATOR PANEL
A.
An annunciator panel with silencing switch shall be provided for remote mounting at location
indicated on the Drawings, to give audible and visual warning of derangement or alarm condition
in the electric set.
B.
The panel shall be storage battery-powered and conform with the latest requirements of the
National Electrical Code, Section 700-12, and NFPA 99. Panel to be NEMA #1 enclosed and
must include, but not be limited to the following:
1.
Alarm lights for the following alarm indications: Low and high jacket water temperature,
low engine lube oil pressure, engine overspeed, low fuel level in fuel tank, and overcrank.
2.
Alarm horn to sound on any alarm condition and silencing switch.
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3.
2.8
2.9
2.10
Indication lights for the following: Emergency on the battery charger malfunctioning.
SILENCER
A.
A flanged connected “hospital-grade” silencer shall be furnished with the engine, complete with
companion flanges and drains. A stainless steel exhaust adapter of suitable length shall be
furnished for the exhaust outlets to the muffler. The exhaust outlets on the engine shall be joined
so that there is only one common exhaust connection, one common flexible connection and one
companion flange. In no case shall the particular installation be subjected to two individual
silencer arrangements, constituting two individual exhaust system installations. A suitable rain cap
shall be provided. The silencer shall be installed inside the weather enclosure and shall be mounted
so that its weight is not supported by the engine. Exhaust pipe size shall be sufficient to ensure
that measure exhaust back pressure does not exceed the maximum limitations specified by the
generator set Manufacturer. Silencer shall be “hospital grade”.
B.
The discharge of the exhaust system shall be connected to a pre-engineered double wall flue pipe
assembly (provided under the Mechanical Contract), and shall be routed to above the Cafeteria
Floor roof as indicated on the Mechanical Drawings, by the Mechanical Contractor.
INTEGRAL FUEL TANK
A.
An integral 10 gauge steel fuel tank base of 1,050 gallons shall be provided as part of the generator
set assembly. The tank shall be equipped with two 2 inch vents, one for the tank, the second for
the rupture basin. A 3-inch fill pipe with approved filler neck shall be included. A rupture basin
for mounting under the fuel tank base and connected directly to the base, to ensure that rain water
or foreign objects will not enter the basin, shall be provided. The design of the basin shall be in
such a manner as to allow for field installation of the basin directly to the generator's pad. The
basin shall be capable of supporting the entire weight of the generator assembly. The tank and
rupture basin shall be a minimum of 10 gauge steel with a rupture basin capacity of at least 1,050
gallons.
B.
The basin shall be equipped with a float switch to sense tank rupture, with wiring and a terminal
block to provide a remote signal of this condition. The shape of the basin shall be designed so that
field installation may easily be achieved.
C.
Provide construction details and sufficient engineering data to verify that the rupture basin, as
constructed, will withstand the full hydrostatic head and wind pressure loading that may be
imposed on the basin as a result of a total tank failure.
D.
Sufficient clearances shall be provided between the fuel tank shell and the rupture basin wall for
maintenance and inspection purposes. For access, gasketed screw-on inspection plates shall be
provided on either side of the basin cover.
E.
Contractor shall fill the fuel tank of each generator with diesel fuel prior to system turnover to
Owner.
GENERATOR ASSOCIATED ACCESSORIES AND CONTROLS
A.
Generator associated accessories and controls shall include the following:
1.
Generator shall be a single ball bearing, salient pole, revolving field alternator of
drip-proof construction. The starter frame shall be bolted to the engine flywheel housing
and the rotor shall be connected by a flexible plate type coupling to the engine flywheel.
The rotor shall consist of an internal pole laminated steel assembly, keyed directly to the
shaft. The pole faces shall contain complete amortisseur windings. The generator shall
be of the permanent magnet type (PMG).
2.
A louver ventilated steel cabinet shall house the regulator assembly and the generator line
leads. The generator must have solidly mounted cabinet with an independently shock
mounted regulator assembly. The construction must provide vibration isolation for the
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regulation unit, as well as a solid cabinet to which electrical conduit may be attached.
Flexible connections shall be used to prohibit transfer of normal engine vibration.
2.11
3.
The rotating bushless exciter shall be mounted within the generator stator frame. The
stationary exciter field shall be a 6-pole distributive winding on a core that is integral with
the generator and bracket. The three-phase rotating armature shall be mounted on an
extension of the generator shaft. Six rotating diodes shall convert this three-phase AC
current to DC for the main revolving field. The generator windings shall not exceed 105
degrees C. temperature rise over 40 degrees C ambient when operating at its continuous
rated load.
4.
The static voltage regulator shall be of compact design and shall have only one moving
part, a hermetically sealed voltage build-up relay which operates once each time the
generator starts up and shuts down. The relay shall be integral with the regulator module.
Voltage regulation shall be accomplished by means of a solid state regulator acting
through a silicon controlled rectifier. The rectifier module shall be epoxy encapsulated
for protection against vibration and atmospheric deterioration. Voltage regulation shall
be 1% from no load to full load with isochronous frequency operation. The voltage
regulator design shall provide optimum response to changing loads by matching generator
response to engine response. The voltage regulator shall be of the "volts per hertz" type
which prevents the engine from being stalled upon load application. The voltage gain
control shall maintain a constant voltage while the engine governor droops as much as 5%
on an 0.8.P.F. load. The regulator shall incorporate a current boost system and
three-phase sensing.
5.
The manual adjustments shall be available and consist of the following:
a.
Voltage level providing an adjustment of generator output voltage 5% above or
below the standard nameplate voltage.
b.
Voltage gain: An adjustment to compensate for voltage drop caused by
governor speed droop. Used to optimize voltage regulation for either an
isochronous or speed droop governor.
c.
Voltage drop: An adjustment to provide for equal division of reactive KVA
when two or more generators are operated in parallel. (Only necessary when two
or more generators are to be used in parallel).
6.
The generator shall be self-ventilated with air entry through louvers and discharge
through screeded openings at the engine end. Air shall be directed by two axial flow shaft
mounted fans. The centrifugal ventilating fan shall be mounted to the flywheel serving as
a pressure ring for the coupling plates.
7.
Generator shall have Class "F" or better insulation in the rotor and in the stator windings.
Temperature rise shall not exceed NEMA Standards for the type insulation used at the
Prime Power rating of the generator. The generator shall have the capability for
producing 10% overload for two (2) house.
8.
Refer to the I/O Points List on the Mechanical Drawings and coordinate all such points
with the Mechanical Contractor in order to ensure their display for monitoring and alarm
at the central BAS.
GENERATOR SUPPORT AND ISOLATION SYSTEM
A.
The engine and generator set shall be equipped with a suitable common steel base for mounting
and engine-generator unit on a concrete foundation. Spring isolators shall be freestanding and
laterally stable with housings that include vertical resilient limit stops to prevent spring extension
when weight is removed. The isolators shall be complete with neoprene acoustical friction pads
between the baseplate and supports. All mounting shall have leveling bolts that must be rigidly
bolted to the equipment. Spring diameters shall be no less than 0.8 of the compressed height of the
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spring as rated load. Springs shall have a minimum additional travel to solid equal to 50% of the
rated deflection.
2.12
COOLING SYSTEM
A.
The engine shall be supplied with a closed glycol cooling system circulated by engine circulating
pumps. Engine cooling water will be cooled by an engine-mounted radiator with a built-in
expansion chamber and blower type fan. This system shall be adequate to maintain engine output
water at 200 deg. f. at full engine load in an ambient temperature of 110 deg. F. and shall have
thermostatic water temperature control. The radiator fan shall be capable of overcoming the
following external static pressure drops. Intake louver and damper .5 inches W.C. minimum, total
external static pressure shall be less than .5 inches W.C.
B.
Cooling System Treatment
1.
2.13
The engine cooling system shall be pretreated by the engine supplier for the inhibition of
internal corrosion. In installations where the unit will be exposed to subfreezing
temperatures, a solution of 50% propylene glycol shall be added.
C.
Flexible braided stainless steel water lines shall be provided (for use on heat exchanger and remote
radiator applications only).
D.
Thermostatically controlled water flow control valve shall be provided on heat exchangers in the
discharge line.
OUTDOOR ENCLOSURE
A.
The generator set and all auxiliaries shall be housed and completely factory-assembled and
manufactured, weatherproof outdoor “Level 3” acoustical enclosure to provide protection for the
unit and to allow it to operate without overheating and with proper air flow when operating at its
full rated load. The unit shall be fabricated of 12 gauge aluminum and shall have structural
supports on its roofs to support the weight of the silencer. Note: The silencer shall be inside the
enclosure. The roof of the housing shall be peaked to allow for rain run-off and a lockable, hinged
access door shall be provided for inspection and filling of the radiator. The enclosure shall be
equipped with motorized bird screens. When the generator starts, the motorized air intake louver
shall open and when the unit stops, the louvers shall close. (This feature shall be completely
factory-wired before shipment). Enclosure shall be equipped with appropriately sized roofmounted ventilation fans and louvers designed to dissipate the heat radiated from the generator set.
The unit design shall be made in such a way as to prevent entrance of small rodents or animals.
The enclosure shall be equipped with two hinged, double lockable doors on each side to allow for
ease of access to the unit.
B.
Enclosure shall be weatherproof, minimum 12 gauge aluminum, double wall construction with 31/2 in. fiberglass insulation and interior perforated liners.
C.
All panels shall be 4" thick. Panels shall consists of bolted together construction. All panels
exterior surfaces, corners, floors deck plates, roof aprons, and all miscellaneous angles and fittings
shall be 12 gauge steel. All interior perforated surfaces shall be 22 gauge steel.
D.
The panel cores shall be 100% filled with fireproof 3½” thick mineral fiber sound absorbing
material having a flame spread of 10 of less, with fuel contributing as 0 and smoke developed as 0.
E.
Key lock sets shall be provided by the manufacturer. Door shall have restraint chain to prevent it
from going past 100 degrees. Door frame shall have a "U" type drip cap which shall extend 6"
beyond either side of door opening.
F.
The roof shall have a full flashed roof opening for the exhaust pipe and vent. The roof shall be
peaked to allow for proper drainage. A gasketed engine exhaust outlet shall be provided on the
roof as a prevention against leakage into the enclosure.
Yonkers Public Schools
16622 - 10 of 14
Rehabilitation of Ventilation and Air Conditioning Systems
K&L # 5537
Emergency Generator
Yonkers Middle High School, SED Control № 66-23-00-01-0-208-010, YPS № OB31
G.
The enclosure shall be designed to withstand wind loading of a minimum of 20 lb./sq. ft. without
damage to the enclosure or roof system. In addition to the wind load, the roof shall be designed
for snow loading of support, without deformation, the weight of two (2) men, for normal
maintenance or repair procedures.
H.
Provide lifting eyes on generator base to allow for rigging generator to location by crane.
I.
The enclosure shall contain summer ventilation fan and thermostat, 3 KW space heaters, two (2)
battery two-head lights, three (3) interior vaporproof fluorescent lights with associated 3-way
weatherproof switches, exterior weatherproof incandescent lights and associated WP switch over
enclosure doors, two (2) weatherproof (ground fault type) receptacles, all installed and wired to a
local 3-phase, 4-wire, 120/208, 100 ampere panel which shall be wired to the building power
distribution system panel. The panel shall be provided with a 3P/30A main CB. All wiring
devices and fixtures shall be weatherproof. All generator enclosure devices (lights, heater,
receptacles, etc.) shall be completely wired and piped in rigid galvanized steel conduit to the
panelboard.
J.
Factory installed emergency break-glass station shall be installed to shut the engine down in the
event of an emergency situation. This item shall be located on the outside of the enclosure in an
easily accessible and noticeable location.
K.
The unit shall be equipped with coolant and oil drains outside the unit facilitate periodic
maintenance. Each drain is to have a drain valve located near the fluid source.
L.
The enclosure shall be painted with two coats of rust-resistant primer and two coats of baked
enamel for protection from the elements. The method of painting shall be via the electro-glaze
charged particle method and of a color selected by the Owner.
M.
The enclosure shall have two (2) 36" x 80" prehung, full 2" thick, insulated soundproof doors,
fully gasketed all around on all four (4) flanged edges. The door assembly is hung in a welded 4"
thick modular frame assembly. The door left shall be of the same 14 ga. construction as the wall
panels. The door shall have three (3) galvanized steel, solid 3/8" dia. fast pin hinges. Hinges shall
be considered as heavy duty industrial type for severe service. The door latches are to be chrome
plated heavy duty steel for severe service, and they are to have roller catches, with adjustable
striker plate.
N.
Door latch is to have interior steel plunger with mushroom cap panic hardware. Panic hardware is
to have positive opening, regardless if a security lock or pin has been placed through the latch
hasps. Door latches, striker, and hinges are to be installed with tamperproof security hardware
which cannot be removed with standard had tools.
O.
Key lock sets shall be provided by the manufacturer. Door is to have restraint chain to prevent it
from going past 100 degrees. Door frame is to have a "U" type drip cap which will extend 6"
beyond either side of door opening.
P.
The roof is to be of the bolt together panel type, constructed similar to side walls and be a
weatherproof deck. After assembly, the roof will receive a heavy monolithic membrane coating to
ensure its weatherability and water-tightness. The roof will have a full flashed roof opening for the
exhaust pipe and vent. The roof shall be peaked to allow for proper drainage. A gasketed engine
exhaust outlet shall be provided on the roof as a prevention against leakage into the enclosure.
Q.
All louver openings shall be full framed and flashed with "U" type drip caps, extending to 4" on
either side of the opening with external full length rain hoods.
R.
The base shall be designed for six (6) or more point lifting. The enclosure shall be designed to
remain structurally intact during normal transport and rigging, with no loss of shape or weathertightness. The enclosure base shall be furnished with I beams sized and spaced as required.
Yonkers Public Schools
16622 - 11 of 14
Rehabilitation of Ventilation and Air Conditioning Systems
K&L # 5537
Emergency Generator
Yonkers Middle High School, SED Control № 66-23-00-01-0-208-010, YPS № OB31
S.
The air intake and discharge louvers shall be as manufactured by the Arrow Louver Company,
L.I.C., N.Y., or equal. The louvers on the enclosure shall be arranged and designed to prevent
leakage.
T.
The enclosure shall be rated for “Level 3” sound attenuation. Appropriate sound baffling and
insulation shall be applied to achieve this designated sound level.
U.
Oil and water drains with 3/4" bronze valves shall be provided and terminate at the floor of the
unit. A crankcase fumes disposal line shall also be pipe from the engine to the outside of the
enclosure.
V.
The generator shall be provided with it=s own conduit entry boxes and copper bus stabs for ease of
feeder access into the generator. Walkway room shall be provided between generator and
enclosure. Incorporate conduit window in the floor of the enclosure for feeder entry to the
generator disconnect. This conduit shall be galvanized steel. Use flexible sealtite conduit for final
connection to generator pull box with ground wire. Generator system ground shall be terminated
at a junction box for extension to grounding electrode by the Electrical Contractor.
PART 3 - EXECUTION
3.1
3.2
3.3
INSPECTION
A.
Contractor shall examine locations where diesel engine- generator set is to be installed and notify
Architect/ Engineer in writing of conditions detrimental to proper and timely completion of work.
B.
Do not proceed with work until unsatisfactory conditions have been corrected.
INSTALLATION
A.
Install diesel engine generator set is required by all applicable codes and as shown on Drawings.
Install diesel engine generator set in accordance with manufacturer's written instructions, the
applicable requirements of NEC, recognized industry practices, and applicable portions of NECA's
"Standard of Installation".
B.
Coordinate with other work as necessary to interface installation of diesel engine-generator set
with other equipment in the area.
FIELD QUALITY CONTROL
A.
Upon completion of installation of diesel engine generator set, test and inspect system to ensure
compliance with requirements. When possible, field correct malfunctioning equipment, then retest
to demonstrate compliance. Replace equipment which cannot be satisfactorily corrected.
B.
At the construction site, provide the services of a competent, factory trained engineer or technician
employed by the manufacturer of the diesel engine generator set to technically supervise and
participate during all of the adjustments and tests for the set and major auxiliaries. Adjustments
and test shall be made in the presence of the Owner.
C.
Provide start-up and load test in accordance with NFPA 110 and include the following:
D.
1.
Record room temperature and time of beginning of test.
2.
Start the unit and record the number of seconds it takes to get it started.
3.
Record voltage readings on all phases and also running hour meter reading RPM and
frequency meter reading. If a hand tachometer is available, use to check RPM against
frequency meter reading.
4.
Provide load bank for full load rating of generator to test all systems on generator for
minimum of 4 hours.
Test After Installation
Yonkers Public Schools
16622 - 12 of 14
Rehabilitation of Ventilation and Air Conditioning Systems
K&L # 5537
Emergency Generator
Yonkers Middle High School, SED Control № 66-23-00-01-0-208-010, YPS № OB31
1.
The diesel engine manufacturer shall furnish the services of qualified factory trained
personnel to run an eight hour test on the equipment furnished at the job site.
2.
This test to be as follows:
2 load - 1 hour
: load - 1 hour
full load at .8 P.F. - 4 hours
E.
3.4
3.5
3.
The test shall be conducted when directed by the Owner and shall be witnessed by the
Engineer and the Owner's representative.
4.
All instruments and equipment (resistors and reactors) required to conduct the test shall
be furnished by the Contractor at no extra cost to the Owner. The instrument shall be
calibrated by a certified laboratory.
5.
Any defects which become evident during the test shall be corrected by the enginegenerator set manufacturer.
Mechanical Examination:
1.
Check engine fuel system and water cooling system for possible leaks during the load test.
If any fuel or water leaks are observed, the unit must be stopped and the leaking item
shall be tightened or replaced as required, and the load test shall be restarted. It is
necessary that each unit run for two hours at full load without any leaks or excessive
water temperature, low oil pressure, etc., before acceptance.
2.
Deliberately speed up the engine by misadjusting the governor and record the speed at
which the engine automatically shuts down.
3.
Simulate low oil pressure by shorting the contacts of the oil pressure relay, to test for
automatic engine shutdown on low oil pressure.
4.
Simulate high water temperature by shorting the contacts of the water temperature relay to
test for automatic engine shutdown on high water temperature.
INSTRUCTIONS, OPERATING MANUALS AND SPARE PARTS
A.
Laminate or mount under plexiglass a set of operating instructions for the system and install
instructions within a frame mounted on the wall near the diesel engine-generator set.
B.
Furnish the services of a competent, factory-trained engineer or technician to be available at the
job site for a period of two days for initial start-up and for instructing personnel in operation and
maintenance of the equipment, on the dates requested by the Owner.
C.
The bidder shall furnish five (5) copies of operating and maintenance instructions and illustrated
parts books covering the engine-generator and auxiliary equipment which will require operating
instructions and periodic maintenance.
D.
The following spare parts shall be supplied at the time of start-up:
$
1 Water pump rebuilding kit
$
1 Complete set of filter elements
$
3 Injectors
$
1 Fuel injection pump
$
1 Set diode and/or generator brushes, whichever is applicable, also complete set of gaskets
$
1 Complete set of gaskets for cylinder head
EQUIPMENT WARRANTY
Yonkers Public Schools
16622 - 13 of 14
Rehabilitation of Ventilation and Air Conditioning Systems
K&L # 5537
Emergency Generator
Yonkers Middle High School, SED Control № 66-23-00-01-0-208-010, YPS № OB31
A.
3.6
SYSTEM SERVICE CONTRACT
A.
3.7
Equipment furnished under these Specifications shall be guaranteed against defective parts and
workmanship under terms of the manufacturer's and dealer's standard warranty. But, in no event,
shall it be for a period of less than two years from date of initial start-up of the system and shall
include labor and travel time for necessary repairs at the job site. Running hours shall not be a
limiting factor for the system warranty.
The supplier of the emergency generator shall provide a service contract for a period of one year
and shall include, but not be limited to, the following:
1.
Engine manufacturer's recommended procedures for weekly (bi-weekly) inspection and
maintenance to be done by user.
2.
Quarterly inspection by the supplier personnel to review the weekly (bi-weekly)
maintenance records being kept by user and train any new Owner operating personnel.
Inspection will include scheduled oil sampling for lube oil contaminants as outlined
below. A 100% load test run on the generator set shall also be included.
3.
Annually inspection shall include all of items in above paragraph except that the
generator set shall be run under system load.
SCHEDULED OIL SAMPLING:
A.
In order to forecast and minimize engine downtime, the supplier of the equipment must provide an
oil sampling analysis kit which operating personnel shall utilize for Scheduled Oil Sampling.
B.
Scheduled Oil Sampling shall be of the atomic absorption spectrophotometry method and shall be
accurate to within a fraction of one part per million for the following elements:
1.
Iron
2.
Chromium
3.
Copper
4.
Aluminum
5.
Silicon
6.
Lead
C.
In addition, the sample shall be tested for the presence of water, fuel dilution, and antifreeze.
D.
All equipment needed to take oil samples shall be provided in a kit at the time of acceptance and
shall include the following:
1.
Sample extraction gun (1).
2.
Bottles (10)
3.
Postage-paid mailers (10).
4.
Written instructions (1).
E.
Immediate notification shall be provided to the Owner when analysis shows any critical reading. If
readings are normal, a report showing that the equipment is operating within established
parameters shall be provided.
F.
This Scheduled Oil Sampling Kit shall be made available, at additional cost, to the Owner beyond
the mandatory starter kit specified previously and shall be optional for the Owner to continue this
service after the starter kit has been depleted.
END OF SECTION 16622
Yonkers Public Schools
16622 - 14 of 14
Rehabilitation of Ventilation and Air Conditioning Systems
K&L # 5537
Emergency Generator