Request for Proposals: Library Generator Installation

CITY OF UNALASKA
Request for Proposals
Generator Installation
Parks, Culture & Recreation - Library Building
INTRODUCTION
The City of Unalaska requests proposals from qualified contractors for the installation of a backup
generator outside the Unalaska Public Library building. The project includes all necessary electrical work,
site preparation including excavation and backfill, and forming and finishing of a concrete pad for the
generator.
OVERVIEW
The City has a Generac SD050 generator with a level 1 sound attenuated enclosure and would like to hire
the selected contractor to install it on the southeast exterior of the library building, near the current
heating fuel tank. The city will deliver the generator to the site prior to installation. The generator includes
a weather protected enclosure, and this project will not require building a separate structure to house
the generator.
The project will include installation of the generator, including all electrical connections; preparation of
the site, including excavation and pouring of a concrete pad; compliance with all relevant building codes,
permits, and regulations; and commissioning and testing of the installed generator with City of Unalaska
staff.
SCOPE OF SERVICES
The selected contractor will be responsible for:
Site Preparation and Concrete Pad Installation
* Preparation of selected area by removing any debris, vegetation, and unsuitable material to
ensure stable ground.
* Contractor will furnish a concrete pad capable of supporting the generator, sized 10'11" X 6'2"
(based on spec sheet for Generac SD050 with sound attenuated enclosure). Pad may be poured
in place or pre-poured.

Installation and Electrical Work
* Installation of all necessary electrical equipment required to support the generator system,
including wiring, conduit, panels, grounding, and interconnections to the existing electrical
system.
* Installation of an Automatic Transfer Switch (ATS) capable of seamless transition during power
outages.
* Coordinating with City of Unalaska staff for testing and ensuring full operational readiness.
Project Completion
* All systems, including generator and electrical components, must be fully tested for performance.
* Contractor must provide City of Unalaska staff with training on generator operation.
* All construction debris, excess materials, and temporary materials must be removed from the site.
* All disturbed landscape must be returned to the original condition.
PROPOSAL REQUIREMENTS
Interested contractors must submit a proposal that includes:
* Cover letter expressing interest in the project and identifying the respondent, individual and
company name, contact information including physical and mailing address, email address and
telephone number, and a listing of key staff
* Description of the contractor's:
o Understanding of the requirements contained in this request for proposals
o Experience in generator installation and electrical contracting
o Description of compliance with pertinent regulatory requirements
* Detailed cost breakdown, including labor, materials, and taxes
* Estimated project timeline
* References from previous similar projects to include name, company, telephone number and
email address
* Proof of insurance and required licensing
EVALUATION CRITERIA
City Staff will evaluate proposals based on the following criteria:
* Demonstrated experience and qualifications - up to 40 points
* Cost effectiveness - up to 20 points
* References from previous clients - up to 20 points
* Demonstration of compliance with all regulatory requirements - up to 10 points
* Completeness of proposal - up to 10 points
ATTACHMENTS
* Attachment 1: Generator Spec Sheet
* Attachment 2: Site plan

DEADLINE
Proposals must be received by the Unalaska City Clerk no later than 5:00 p.m. Alaska Time on Monday,
March 30, 2026. Proposals may be delivered via email, U.S. Mail, other delivery service or by hand delivery.
Late submissions will not be considered.
City Clerk
City of Unalaska
43 Raven Way
P.O. Box 610
Unalaska, AK 99685
Email: emagdaong@unalaska.gov
CONTACT INFORMATION
For questions or further information about this RFP, please contact:
Roger Blakeley Marc Kielmeyer Karen Kresh
PCR Director DPW Project Manager City Librarian
City of Unalaska City of Unalaska City of Unalaska
P.O. Box 610 P.O. Box 610 P.O. Box 610
Unalaska, AK 99685 Unalaska, AK 99685 Unalaska, AK 99685
(907) 581-1297 (907) 581-1260 (907) 581-5060
rblakeley@unalaska.gov mkielmeyer@unalaska.gov kkresh@unalaska.gov

SD050 | 3.4L | 50 kW
INDUSTRIAL DIESEL GENERATOR SET
EPA Certified Stationary Emergency
TEEHS
CEPS
Standby Power Rating
50 kW, 63 kVA, 60 Hz
Prime Power Rating*
45 kW, 56 kVA, 60 Hz
*Assembled in the USA using
domestic and foreign parts
*EPA Certified Prime ratings are not available in the US or its Territories
Image used for illustration purposes only
Codes and Standards Powering Ahead
Not all codes and standards apply to all configurations. Contact
factory for details. For over 50 years, Generac has provided innovative
design and superior manufacturing.
UL2200, UL6200, UL1236, UL142
Generac ensures superior quality by designing and
CSA C22.2 manufacturing most of its generator components,
including alternators, enclosures and base tanks, control
systems and communications software.
TM BS5514 and DIN 6271
Generac gensets utilize a wide variety of options,
SAE J1349 configurations and arrangements, allowing us to meet the
(R)
standby power needs of practically every application.
NFPA 37, 70, 99, 110
Generac searched globally to ensure the most reliable
(R) engines power our generators. We choose only engines
NEC700, 701, 702, 708
that have already been proven in heavy-duty industrial
applications under adverse conditions.
ISO 3046, 7637, 8528, 9001
Generac is committed to ensuring our customers' service
NEMA ICS10, MG1, 250, ICS6, AB1 support continues after their generator purchase.
ANSI C62.41
IBC 2009, CBC 2010, IBC 2012,
ASCE 7-05, ASCE 7-10, ICC-ES AC-
156 (2012)
1 of 6

SD050 | 3.4L | 50 kW
INDUSTRIAL DIESEL GENERATOR SET
EPA Certified Stationary Emergency
TEEHS
CEPS
STANDARD FEATURES
ENGINE SYSTEM ALTERNATOR SYSTEM ENCLOSURE (If Selected)
* Oil Drain Extension * UL2200 GENprotect(TM) * Rust-Proof Fasteners with Nylon Washers to
* Air Cleaner * 12 Leads (3-Phase, Non 600V) Protect Finish
* Fan Guard * Class H Insulation Material * High Performance Sound-Absorbing Material
(Sound Attenuated Enclosures)
* Stainless Steel Flexible Exhaust Connection * Vented Rotor
* Gasketed Doors
* Factory Filled Oil and Coolant * 2/3 Pitch
* Stamped Air-Intake Louvers
* Radiator Duct Adapter (Open Set Only) * Skewed Stator
* Upward Facing Discharge Hoods
* Critical Silencer (Enclosed Units Only) * Auxiliary Voltage Regulator Power Winding (Radiator and Exhaust)
* Brushless Excitation * Stainless Steel Lift Off Door Hinges
Fuel System * Sealed Bearing * Stainless Steel Lockable Handles
* Fuel Lockoff Solenoid * Automated Manufacturing (Winding, Insertion, * RhinoCoat(TM) - Textured Polyester Powder Coat Paint
Lacing, Varnishing)
* Primary Fuel Filter
* Rotor Dynamically Spin Balanced
FUEL TANKS (If Selected)
* Full Load Capacity Alternator
Cooling System
* Protective Thermal Switch * UL 142/ULC S-601
* Closed Coolant Recovery System * Double Wall Construction
* UV/Ozone Resistant Hoses GENERATOR SET * Vents
* Factory-Installed Radiator * Internal Genset Vibration Isolation * Sloped Top
* Radiator Drain Extension * Separation of Circuits - High/Low Voltage * Sloped Bottom
* 50/50 Ethylene Glycol Antifreeze * Separation of Circuits - Multiple Breakers * Factory Pressure Tested - 2 psi
* 120 VAC Coolant Heater * Wrapped Exhaust Piping * Rupture Basin Alarm
* Standard Factory Testing * Fuel Level
Electrical System * 2 Year Limited Warranty (Standby Rated Units) * Check Valve In Supply and Return Lines
* Battery Charging Alternator * 1 Year Limited Warranty (Prime Rated Units) * RhinoCoat(TM)- Textured Polyester Powder Coat Paint
* Battery Cables * Silencer Mounted in the Discharge Hood * Stainless Steel Hardware
* Battery Tray (Enclosed Only)
* Rubber-Booted Engine Electrical Connections * Silencer of Heat Shield
* Solenoid Activated Starter Motor
CONTROL SYSTEM * Audible Alarms and Shutdowns * Oil Pressure
* Not in Auto (Flashing Light) * Coolant Temperature
* Auto/Off/Manual Switch * Coolant Level
* E-Stop (Red Mushroom-Type) * Engine Speed
* NFPA110 Level I and II (Programmable) * Battery Voltage
* Customizable Alarms, Warnings, and Events * Frequency
* Modbus(R) Protocol
* Predictive Maintenance Algorithm Alarms and Warnings
* Sealed Boards * Oil Pressure
* Password Parameter Adjustment Protection * Coolant Temperature
Digital H Control Panel- Dual 4x20 Display * Single Point Ground * Coolant Level
* 16 Channel Remote Trending * Engine Overspeed
Program Functions * 0.2 msec High Speed Remote Trending * Battery Voltage
* Programmable Crank Limiter * Alarm Information Automatically Annunciated * Alarms and Warnings Time and Date Stamped
* 7-Day Programmable Exerciser on the Display * Snap Shots of Key Operation Parameters During
* Special Applications Programmable Logic Controller Alarms and Warnings
* RS-232/485 Communications Full System Status Display * Alarms and Warnings Spelled Out (No Alarm Codes)
* Power Output (kW)
* All Phase Sensing Digital Voltage Regulator
* Power Factor
* 2-Wire Start Capability
* kW Hours, Total, and Last Run
* Date/Time Fault History (Event Log)
* Real/Reactive/Apparent Power
* Isochronous Governor Control
* Waterproof/Sealed Connectors * All Phase AC Voltage 2 of 6
* All Phase Currents

SD050 | 3.4L | 50 kW
INDUSTRIAL DIESEL GENERATOR SET
EPA Certified Stationary Emergency
TEEHS
CEPS
CONFIGURABLE OPTIONS
ENGINE SYSTEM CIRCUIT BREAKER OPTIONS CONTROL SYSTEM
Engine Coolant Heater Main Line Circuit Breaker NFPA 110 Compliant 21-Light Remote Annunciator
Oil Heater 2nd Main Line Circuit Breaker Remote Relay Assembly (8 or 16)
Industrial Silencer (Open Set) Shunt Trip and Auxiliary Contact Oil Temperature Sender with Alarm
Air Filter Restriction Indicator Electronic Trip Breakers Remote E-Stop (Break Glass-Type, Surface Mount)
Fan and Belt Guards (Enclosed Units Only) Remote E-Stop (Red Mushroom-Type,
ENCLOSURE Surface Mount)
FUEL SYSTEM Remote E-Stop (Red Mushroom-Type, Flush Mount)
Weather Protected Enclosure Remote Communication - Modem
Flexible Fuel Lines Level 1 Sound Attenuated 10A Engine Run Relay
Primary Fuel Filter Level 2 Sound Attenuated Ground Fault Indication and Protection Functions
Level 2 Sound Attenuated with Motorized Dampers 100 dB Alarm Horn
ELECTRICAL SYSTEM Steel Enclosure 120V GFCI and 240V Outlets
Aluminum Enclosure
10A UL Listed Battery Charger Up to 200 MPH Wind Load Rating (Contact Factory FUEL TANKS (Size On Last Page)
Battery Warmer for Availability)
AC/DC Enclosure Lighting Kit 8 in (203.2 mm) Fill Extension
ALTERNATOR SYSTEM Door Open Alarm Switch 13 in (330.2 mm) Fill Extension
Pad Vibration Isolator 19 in (482.6 mm) Fill Extension
Alternator Upsizing
Enclosure Heater Overfill Protection Valve
Anti-Condensation Heater
Vent Extensions
Tropical Coating
WARRANTY (Standby Gensets Only) Tank Risers
Permanent Magnet Excitation
Fuel Drop Tube
2 Year Extended Limited Warranty
Return Hose
GENERATOR SET 5 Year Limited Warranty
90% Fuel Level Alarm
5 Year Extended Limited Warranty
8 Position Load Center
7 Year Extended Limited Warranty
10 Year Extended Limited Warranty
ENGINEERED OPTIONS
ENGINE SYSTEM ALTERNATOR SYSTEM TANKS
Coolant Heater Ball Valves 3rd Breaker System UL2085 Tank
Fluid Containment Pan Stainless Steel Tanks
GENERATOR SET
CONTROL SYSTEM
Special Testing
Spare Inputs (x4) / Outputs (x4) IBC Seismic Certification
Battery Disconnect Switch
3 of 6

SD050 | 3.4L | 50 kW
INDUSTRIAL DIESEL GENERATOR SET
EPA Certified Stationary Emergency
TEEHS
CEPS
APPLICATION AND ENGINEERING DATA
ENGINE SPECIFICATIONS
General Cooling System
Make Generac Cooling System Type Closed Recovery
EPA Emissions Compliance Stationary Emergency Water Pump Type Pre-Lubed, Self Sealing
EPA Emissions Reference See Emission Data Sheet Fan Type Pusher
Cylinder # 4 Fan Speed - rpm 2,250
Type In-Line Fan Diameter - in (mm) 560 (22)
Displacement - in3 (L) 207.48 (3.4)
Fuel System
Bore - in (mm) 3.86 (98)
Stroke - in (mm) 4.45 (113) Fuel Type Ultra Low Sulfur Diesel Fuel #2
Compression Ratio 18.5:1 Fuel Specifications ASTM
Intake Air Method Turbocharged/Aftercooled Fuel Filtering (microns) 10
Cylinder Head Cast Iron OHV Fuel Inject Pump Bosch (VE)
Piston Type Aluminum Fuel Pump Type Engine Driven Gear
Crankshaft Type Forged Steel Injector Type Pintel - 2,100 psi (14,479 kPa)
Fuel Supply Line - in (mm) 0.312 (7.92) NPT
Engine Governing
Fuel Return Line - in (mm) 0.312 (7.92) NPT
Governor Electronic Isochronous
Engine Electrical System
Frequency Regulation (Steady State) 0.25%
System Voltage 12 VDC
Lubrication System
Battery Charger Alternator Standard
Oil Pump Type Gear Battery Size See Battery Index 0161970SBY
Oil Filter Type Full Flow Cartridge Battery Voltage 12 VDC
Crankcase Capacity - qt (L) 7.4 (7) Ground Polarity Negative
ALTERNATOR SPECIFICATIONS
Standard Model K0050124Y21 Standard Excitation Synchronous Brushless
Poles 4 Bearings Single Sealed Cartridge
Field Type Revolving Coupling Direct via Flexible Disc
Insulation Class - Rotor H Load Capacity - Standby 100%
Insulation Class - Stator H Prototype Short Circuit Test Yes
Total Harmonic Distortion <5% (3-Phase) Voltage Regulator Type Digital
Telephone Interference Factor (TIF) < 50 Number of Sensed Phases All
Regulation Accuracy (Steady State) 0.25%
4 of 6

SD050 | 3.4L | 50 kW
INDUSTRIAL DIESEL GENERATOR SET
EPA Certified Stationary Emergency
TEEHS
CEPS
OPERATING DATA
POWER RATINGS
Standby
Single-Phase 120/240 VAC @1.0pf 50 kW Amps: 208
Three-Phase 120/208 VAC @0.8pf 50 kW Amps: 173
Three-Phase 120/240 VAC @0.8pf 50 kW Amps: 150
Three-Phase 277/480 VAC @0.8pf 50 kW Amps: 75
Three-Phase 346/600 VAC @0.8pf 50 kW Amps: 60
MOTOR STARTING CAPABILITIES (skVA)
skVA vs. Voltage Dip
277/480 VAC 30% 208/240 VAC 30%
K0050124Y21 98 K0050124Y21 75
K0060124Y21 124 K0060124Y21 95
FUEL CONSUMPTION RATES*
Diesel - gph (Lph)
Fuel Pump Lift - ft (m) Percent Load Standby
3 (1) 25% 1.3 (4.9)
50% 2.3 (8.7)
Total Fuel Pump Flow (Combustion + Return) - gph (Lph) 75% 3.3 (12.5)
3.6 (13.5) 100% 4.3 (16.4)
* Fuel supply installation must accommodate fuel
consumption rates at 100% load.
COOLING
Standby
Coolant Flow gpm (Lpm) 12.2 (46)
Coolant System Capacity gal (L) 2.5 (9.5)
Heat Rejection to Coolant BTU/hr (kW) 135,900 (39.8)
Inlet Air scfm (m3/hr) 7,500 (212)
Maximum Operating Ambient Temperature degreesF ( degreesC) 122 (50)
Maximum Ambient Temperature (Before Derate) See Bulletin No. 0199280SSD
Maximum Radiator Backpressure in H O (kPa) 0.5 (0.12)
2
COMBUSTION AIR REQUIREMENTS
Standby
Flow at Rated Power - scfm (m3/min) 166 (4.7)
ENGINE EXHAUST
Standby Standby
Rated Engine Speed RPM 1,800 Exhaust Flow (Rated Output) scfm (m3/min) 448 (12.7)
Horsepower at Rated kW** hp 86 Max. Allowable Backpressure inHg (kPa) 1.5 (5.1)
Piston Speed ft/min (m/min) 1,335 (406.9) Exhaust Temp (Rated Output) degreesF ( degreesC) 1,044 (562)
BMEP psi (kPa) 169 (1,165)
** Refer to "Emissions Data Sheet" for maximum bHP for EPA and SCAQMD permitting purposes.
Deration - Operational characteristics consider maximum ambient conditions. Derate factors may apply under atypical site conditions.
Please contact a Generac Power Systems Industrial Dealer for additional details. All performance ratings in accordance with ISO3046, BS5514, ISO8528, and DIN6271 standards.
Standby - See Bulletin 0187500SSB
Prime - See Bulletin 0187510SSB
5 of 6

SD050 | 3.4L | 50 kW
INDUSTRIAL DIESEL GENERATOR SET
EPA Certified Stationary Emergency
TEEHS
CEPS
D I MENSIONS AND WEIGHTS*
OPEN SET (Includes Exhaust Flex)
Usable
Run Time Minimum Weight Maximum Weight
Capacity L x W x H - in (mm)
Hours - lbs (kg) - lbs (kg)
- Gal (L)
No Tank - 76.7 (1,948) x 37.4 (950) x 45.2 (1,147) 1,710 (776) 1,836 (833)
12 54 (204) 76.7 (1,948) x 37.4 (950) x 58.2 (1,477) 2,190 (993) 2,316 (932)
30 132 (499) 76.7 (1,948) x 37.4 (950) x 70.2 (1,782) 2,420 (1,098) 2,546 (979)
44 190 (719) 76.7 (1,948) x 37.4 (950) x 82.2 (2,087) 2,629 (1,192) 2,755 (1,022)
49 211 (799) 106.0 (2,692) x 37.4 (950) x 71.2 (1,807) 2,634 (1,192) 2,760 (1,023)
69 300 (1,136) 92.9 (2,360) x 37.4 (950) x 85.7 (2,176) 2,692 (1,221) 2,818 (1,035)
WEATHER PROTECTED ENCLOSURE
Run Usable
Time Capacity L x W x H - in (mm) Steel Weight Steel Weight Aluminum Aluminum
- Hours - Gal (L) Minimum Maximum Weight Minimum Weight Maximum
- lbs (kg) - lbs (kg) - lbs (kg) - lbs (kg)
No Tank - 94.8 (2,409) x 38.0 (965) x 49.5 (1,258) 2,158 (979) 2,286 (1,037) 1,935 (878) 2,965 (1,345)
12 54 (204) 94.8 (2,409) x 38.0 (965) x 62.5 (1,588) 2,638 (1,197) 2,766 (1,255) 2,415 (1,096) 3,445 (1,563)
30 132 (499) 94.8 (2,409) x 38.0 (965) x 74.5 (1,893) 2,868 (1,301) 2,996 (1,359) 2,645 (1,200) 3,675 (1,667)
44 190 (719) 94.8 (2,409) x 38.0 (965) x 86.5 (2,198) 3,077 (1,396) 3,205 (1,454) 2,854 (1,295) 3,884 (1,762)
49 211 (799) 106.0 (2,692) x 38.0 (965) x 99.0 (2,516) 4,316 (1,958) 4,572 (2,074) 3,870 (1,755) 5,930 (2,690)
69 300 (1,136) 94.8 (2,409) x 38.0 (965) x 90.0 (2,287) 3,140 (1,424) 3,268 (1,482) 2,917 (1,323) 3,947 (1,790)
LEVEL 1 SOUND ATTENUATED ENCLOSURE
Run Usable
Time Capacity L x W x H - in (mm) Steel Weight Steel Weight Aluminum Aluminum
- Hours - Gal (L) Minimum Maximum Weight Minimum Weight Maximum
- lbs (kg) - lbs (kg) - lbs (kg) - lbs (kg)
No Tank - 94.8 (2,409) x 38.0 (965) x 49.5 (1,258) 2,158 (979) 2,286 (1,037) 1,935 (878) 2,965 (1,345)
12 54 (204) 94.8 (2,409) x 38.0 (965) x 62.5 (1,588) 2,638 (1,197) 2,766 (1,255) 2,415 (1,096) 3,445 (1,563)
30 132 (499) 94.8 (2,409) x 38.0 (965) x 74.5 (1,893) 2,868 (1,301) 2,996 (1,359) 2,645 (1,200) 3,675 (1,667)
44 190 (719) 94.8 (2,409) x 38.0 (965) x 86.5 (2,198) 3,077 (1,396) 3,205 (1,454) 2,854 (1,295) 3,884 (1,762)
49 211 (799) 106.0 (2,692) x 38.0 (965) x 99.0 (2,516) 4,316 (1,958) 4,572 (2,074) 3,870 (1,755) 5,930 (2,690)
69 300 (1,136) 94.8 (2,409) x 38.0 (965) x 90.0 (2,287) 3,140 (1,424) 3,268 (1,482) 2,917 (1,323) 3,947 (1,790)
LEVEL 2 SOUND ATTENUATED ENCLOSURE
Run Usable
Time Capacity L x W x H - in (mm) Steel Weight Steel Weight Aluminum Aluminum
- Hours - Gal (L) Minimum Maximum Weight Minimum Weight Maximum
- lbs (kg) - lbs (kg) - lbs (kg) - lbs (kg)
No Tank - 94.8 (2,409) x 38 (965) x 70.1 (1,780) 2,389 (1,084) 2,517 (1,142) 2,035 (923) 2,163 (981)
12 54 (204) 94.8 (2,409) x 38 (965) x 62.5 (1,588) 2,638 (1,197) 2,766 (1,255) 2,415 (1,095) 3,445 (1,563)
30 132 (499) 94.8 (2,409) x 38 (965) x 74.5 (1,893) 2,868 (1,301) 2,996 (1,359) 2,645 (1,200) 3,675 (1,667)
44 190 (719) 94.8 (2,409) x 38 (965) x 86.5 (2,198) 3,077 (1,396) 3,205 (1,454) 2,854 (1,295) 3,884 (1,762)
49 211 (799) 106.0 (2,692) x 38 (965) x 99 (2,516) 4,316 (1,958) 4,572 (2,074) 3,870 (1,755) 5,930 (2,690)
69 300 (1,136) 94.8 (2,409) x 38 (965) x 110.6 (2,809) 3,371 (1,529) 3,499 (1,587) 3,017 (1,368) 3,145 (1,427)
* All measurements are approximate and for estimation purposes only. Specification characteristics may change without notice. Please contact a Generac Power Systems Industrial Dealer for detailed
installation drawings.
6 of 6
Generac Power Systems, Inc. | P.O. Box 8 | Waukesha, WI 53189 Part No 0K5090
P: (262) 544-4811 (C)2019 Generac Power Systems, Inc. All rights reserved. All specifications are subject to change without notice. Rev. D 08/16/19

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