Install Electrical Generator at the Fisher House_RFIs.pdf

Install Electrical Generator at the Fisher House Project Number: 671-22-139

RFI Questions / Answers

1) Please confirm Fuel tank run time requirements. I read 24-hour runtime in one place and 96-hour time in another.

A base mounted dual-wall diesel fuel storage tank will be provided for a minimum 24 hours of fuel capacity.

2) Please confirm generator KW trigger This is 200KW generator and the generator shall be connected to the ATS’s and everything shall be tested and commissioned as a complete system.

3) Please confirm voltage and amps for ATS Please refer to drawing number E-500 keyed note 1.

4) Reference 26 32 13 – 6: Is there a preferred brand for the Generator?

The basis for design was Cat D200 GC generator, but we prefer Cummins generator set as our maintenance and Operations teams are more conversant with Cummins with regards to service and maintenance. See attachments for specs.

5) Reference 26 32 13 –7: Is there a preferred brand for the engine coupled to the Generator?

Same as question 4 above.

6) Reference Drawing E-500/GI 100: The fuel storage in GI 100 has a requirement of a minimum of 24 hours whereas E-500 has a requirement of 96 hours. What are the desired minimum hours of fuel storage?

7) Reference Drawing E-500: Is there a preferred brand for the Resistive Load Bank as prescribed in the drawing?

The basis of design was ASCO Power Technologies. The VA requires a resistive load bank that is compatible with the generator set and meets the requirements specified in the drawings/specifications. See attachment for mor information.

8) Reference Drawing E-500: Where is the location of the Security Guard House for the generator’s annunciator panel?

The planned generator annunciator panel shall be installed in the manager’s office of the fisher house 2 building.

9) Reference ES100: Will the emergency shutoff be located within the parameters of the existing fence of the ATS?

The emergency shutoff shall be on the side of the enclosure opposite the sidewalk. It is shown on sheet ES101, keynote 10

10) The summary of the project defines the fuel requirements as 24 hours. Sheet E-500, drawing 2, notes the fuel requirement is for a minimum of 96 hours. Please clarify the required minimum for fuel storage. The industry standard for this application is 24 hours.

11) Is a Black Powder Coated Aluminum Double Gate Acceptable material? Being a lighter weight material, it will be much easier and longer lasting for the structural corners and hinges.

No. We shall stick to what is approved in the design drawings/specifications

12) Can you specify the exact desired location of the attenuator panel in the Fisher House #2 Building?

Refer to question 8

13) Where do the existing conduits for the attenuator panel conductors enter the Fisher House building from the ATS Pad location?

Not too sure what you meant by attenuator in reference to this project. Need more clarification to provide response.

14) . Do you want all concrete and aggregate testing conducted exactly as mentioned in the Specs Book?

Yes. Project shall follow design drawing and specifications

15) Do you want 3rd Party Safety Inspections conducted Monthly by a licensed outside agency?

Please refer to specification section 01 35 26 – 1.9

16) Do you require compaction testing of soil prior to concrete work beginning?

Please refer to specification section 01 45 29 - 3.1 Earthwork

17) Will any flower beds with mulch be included in the design?

Please refer to Specification section 31 20 11

18) Are we planting any new trees as part of the project?

We shall not be planting new trees, but grass shall be replaced in all excavated areas where grass was removed.

19) Will a secondary retaining wall be constructed near the sidewalk?

Please refer to drawing number AS100

20) Where will irrigation lines be relocated during the installation?

We shall send you the irrigation plans pertaining to fisher houses 1 and 2.

21) Would rock installation be an option instead of grass/ re-sodding for certain areas?

No. We shall plant grass/re-sodding in certain areas

22) Are there any plans to install new plants or shrubs?

Refer to question 18

23) If grass installation is included, note that planting should occur after February due to dormancy during this season.

That has been noted.

24) Is the decking that is screwed to the gate going to be left open on the top and bottom?

(safety concern due to sharp edges).

We shall follow the drawing and specifications and make adjustments where needed.

25) Regarding the 1 1/2" 18 GA Metal Deck attached to frame W/#10 SMS 8" O.C. max - Is there an alternative material that can be used? Currently that decking is difficult to find and can be costly. If allowed, are we able to use a lighter gauge, sheet steel instead. It is readily available and reasonably priced.

We can review alternative Metal deck materials that meets the same standards as the one specified

26) Other than what is at the bottom of the door, there are no latches or locking mechanisms.

Will we be installing some? If so, please provide details.

I believe the highlighted middle portion of the door is the latches / locking mechanism.

27) What is the model # or can we get the submittal of the existing (2) ATS’s?

The contractor shall connect the generator to the ATS’s and shall be tested as a complete system. Below is information on the ATS

28) What is the period of performance for this project? Specs say 365 calendar days and solicitation says 560.

The Period of Performance for this project is 560 calendar days. We added more time to compensate for the generator lead time.

29) Can the site super act as the SSHO and QC if they possess all of the required qualifications and experience or will we be required to have 2 personnel on site at all times?

Refer to the TIL. MASTER CONSTRUCTION SPECIFICATIONS (PG-18-1) - Office of Construction & Facilities Management (va.gov) 01 35 26 Safety Requirements, https://www.cfm.va.gov/til/spec.asp

1.9 “SITE SAFETY AND HEALTH OFFICER” (SSHO) and “COMPETENT PERSON” (CP):

C. These Competent Persons can have collateral duties as the subcontractor’s superintendent and/or work crew lead persons as well as fill more than one specialized CP role (i.e. Asbestos, Electrical, Cranes, & Derricks, Demolition, Fall Protection, Fire Safety/Life Safety, Ladder, Rigging, Scaffolds, and Trenches/Excavations). However, the SSHO has btxe a separate qualified individual from the Prime Contractor’s Superintendent and/or Quality Control Manager with duties only as the SSHO.

30) What is the minimum PSI for the new concrete pad and sidewalk and what testing will be required?

Please refer to project specification section 03 30 00 for more information.

31) Due to the size of the construction area, will a fence be required and will we need wind screen?

A construction site barrier shall be in place with appropriate signages to prevent people from getting into a construction zone.

32) Will a laydown area be provided in close proximity to the construction site?

We will designate some areas to stage materials and tools.

33) Is there a specific generator manufacturer that we are to use?

Generac/Cummins/Kohler/CAT ect..

Refer to question 4

34) Is this project tax exempt? If so, will a tax exemption certificate be provided?

The V.T.C.A form inserted in the solicitation addresses this question. Therefore, no new guidance is provided. This is done at the state level from the awarded contractor and therefore is not a Network Contracting Office (NCO) 17 function.

35) What is the approved route for equipment and material deliveries to the Fisher House?

The fisher is located at 7485 Wurzbach Road, San Antonio, TX 78229.

36) Since on-site staging and parking are not provided, where will contractors be permitted to store materials and equipment?

Refer to question 32

37) Are there any existing utilities or underground lines near the proposed generator pad location that need to be relocated or protected?

Yes. There are existing utilities / underground lines near the proposed generator pad that need to be protected.

38) Are there any known hazardous materials (asbestos, lead, etc.) within the work area?

There is no asbestos to dispose or abate on this project

39) Is the contractor responsible for 3rd party testing of the concrete mix, rebar placement, compaction testing, and compressive strength testing of mortar Yes.

40) Who is responsible for the commissioning agent? VA or contractor?

The contractor shall be responsible for the commissioning agent. The generator shall be Connected to the ATS’s and everything shall be tested and commissioned as a system.

41) Who is responsible for coordinating the 811-utility dig locates?

It shall be the responsibility of the contractor to coordinate with 811 dig to locate underground utilities before excavation

42) Does the contractor need to provide the first tank of fuel for the generator?

Yes. The contractor shall provide the first tank of fuel for the generator for testing and acceptance checks.

43) What kind of structural reinforcement is required for the sidewalk?

Please refer to specification section 01 45 29 – 3.5 and 3.6E

44) Please confirm POP for this solicitation. SF 1442 listed as 560 days, however, specifications listed as 365 days.

The Period of Performance for this project is 560 calendar days. We added more time to compensate for the generator lead time.

45) We are working on the details on the VA specifications as presented and validating the data provided. We have identified what we believe to be an issue. Namely the VA specifications as provided list 750 KCMIL from the generator to the two installed ATS’s and then into the main panels located at fisher 1 and fisher 2.

We have estimated this run to be approx... 576 feet in total. Our calculations show that this conductor (750 KCMIL) runs for this distance at 208v will have an approximate voltage drop of 19 volts. Needless to say, if we are correct this is a major issue.

To resolve this voltage, drop issue we would have to run parallel KCMIL 500’s which would require 2 more 4” conduits to be run for the approx... 576 feet.

Please advise how you would like us to proceed and any additional details you may require?

The design calls for each phase to have 4, 750KCMIL conductors each. With 4 conductors/phase the voltage drop would be much less than 5% combined allowed for both feeder and branched circuits.

Cat® D200 GC Diesel Generator Sets

LEHE2668-02 1/2

Standby : 60 Hz

PACKAGE PERFORMANCE

Image shown may not reflect actual configuration.

Engine Model Cat® C7.1 ACERT In-line 6, 4-cycle diesel

Bore x Stroke 105 mm x 135 mm (4.1 in x 5.3 in)

Displacement 7.01 L (428 in³)

Compression Ratio 16.7:1

Aspiration Turbocharged Air-to-Air-Aftercooled

Fuel Injection System Electronic, Common Rail

Governor Electronic ADEM™ A4

Model Standby Emission Strategy D200 GC 250 kVA, 200 ekW EPA TIER III

Performance Standby Frequency 60 Hz

Genset Power Rating 250 kVA

Genset power rating with fan, 3p@ 0.8 & 1p@1.0 power factor 200 eKW

Performance Number P4364A

Fuel Consumption 100% load with fan, L/hr (gal/hr) 56.4 (14.9)

75% load with fan, L/hr (gal/hr) 45.8 (12.1)

50% load with fan, L/hr (gal/hr) 32.6 (8.6)

25% load with fan, L/hr (gal/hr) 14.3 (3.7)

Cooling System1

Radiator air flow restriction (system), kPa (in. Water) 0.12 (0.48)

Engine coolant capacity, L (gal) 9.5 (2.5)

Radiator coolant capacity, L (gal) 11.5 (3.0)

Inlet Air Combustion air inlet flow rate, m³/min (cfm) 15.8 (558)

Max. Allowable Combustion Air Inlet Temp, °C (°F) 51 (124)

Exhaust System Exhaust stack gas temperature, °C (°F) 533 (991)

Exhaust gas flow rate, m³/min (cfm) 38.3 (1353)

Exhaust system backpressure (maximum allowable) kPa (in. water) 15.0 (60.2)

Heat Rejection Heat rejection to jacket water, kW (Btu/min) 91.8 (5221)

Heat rejection to exhaust (total) kW (Btu/min) 183.0 (10407)

Heat rejection to aftercooler, kW (Btu/min) 45.0 (2559)

Heat rejection to atmosphere from engine, kW (Btu/min) 35.3 (2019)

Emissions (Nominal)2

NOx + HC, g/kW-hr 3.73

CO, g/kW-hr 1.31

PM, g/kW-hr 0.18

D200 GC Diesel Generator Sets Electric Power

Alternator3

Voltages 480V 208V 600V

Motor starting capability @ 30% Voltage Dip, skVA 361 333 780

Current Amps 301 694 241

Frame Size M2294L4 M2736L4 M2736L4

Excitation SE SE AREP

Temperature Rise, °C 130 130 105

WEIGHTS & DIMENSIONS

APPLICABLE CODES AND STANDARDS:

AS1359, CSA C22.2 No100-04, UL142, UL489, UL869, UL2200, NFPA37, NFPA70, NFPA99, NFPA110, IBC, IEC60034-1, ISO3046, ISO8528, NEMA MG1-22, NEMA MG1-33, 2006/95/EC, 2006/42/EC, 2004/108/EC.

Note: Codes may not be available in all model configurations. Please consult your local Cat Dealer representative for availability.

STANDBY: Output available with varying load for the duration of the interruption of the normal source power. Average power output is 70% of the standby power rating. Typical operation is 200 hours per year, with maximum expected usage of 500 hours per year.

PRIME: Output available with varying load for an unlimited time. Average power output is 70% of the prime power rating. Typical peak demand is 100% of prime rated ekW with 10% overload capability for emergency use for a maximum of 1 hour in 12. Overload operation cannot exceed 25 hours per year RATINGS: Ratings are based on SAE J1349 standard conditions. These ratings also apply at ISO3046 standard conditions.

DEFINITIONS AND CONDITIONS

1 �For ambient and altitude capabilities consult your Cat dealer. Air flow restriction (system) is added to existing restriction from factory.

2 �Emissions data measurement procedures are consistent with those described in EPA CFR 40 Part 89, Subpart D & E and ISO8178-1 for measuring HC, CO, PM, NOx. Data shown is based on steady state operating conditions of 77° F, 28.42 in HG and number 2 diesel fuel with 35° API and LHV of 18,390 BTU/lb. The nominal emissions data shown is subject to instrumentation, measurement, facility and engine to engine variations. Emissions data is based on 100% load and thus cannot be used to compare to EPA regulations which use values based on a weighted cycle.

3 �UL 2200 Listed packages may have oversized generators with a different temperature rise and motor starting characteristics. Generator temperature rise is based on a 40° C ambient per NEMA MG1-32.

LEHE2668-02 (06/22)

www.Cat.com/electricpower All rights reserved.

Materials and specifications are subject to change without notice.The International System of Units (SI) is used in this publication.

© 2022 Caterpillar. All Rights Reserved. CAT, CATERPILLAR, LET’S DO THE WORK, their respective logos, “Caterpillar Corporate Yellow”, the “Power Edge” and Cat “Modern Hex” trade dress as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission

Dim “A” mm (in)

Dim “B” mm (in)

Dim “C” mm (in)

Dry Weight kg (lb)

2634 (103.7) 1300 (51.2) 1492 (58.7) 1777 (3917)

C

A B

Note: General configuration not to be used for installation. See general dimension drawings for detail.

Cat® GC Enclosures

LEHE20120-03

D40 GC - D200 GC

Sound Attenuated Level 2 Enclosures 60 Hz:40 ekW - 200 ekW

Image shown may not reflect actual configuration

Features Robust/Highly Corrosion Resistant Construction

• Factory installed on skid base or 24hr Integral fuel tank

• Caterpillar white paint

• Environmentally friendly, polyester powder baked paint

• 18 gauge steel minimum.

• Zinc plated fasteners

• Stainless steel hinges

• Internally mounted exhaust silencing system

• Designed and tested to comply with UL 2200 Listed generator set package.

• Enclosures are weatherproof and are extremely rugged to withstand outdoor exposure to the elements of weather.

• Comply with ASCE /SEI 7 for Wind Loads up to 100mph

• Optional seismic certification offered

• Compression door latches providing solid door seal

Excellent Access

• Large cable entry area for installation ease

• Accommodates side mounted single or multiple breakers

• Single door on left hand side

• Dual doors on right hand side

• Doors vertically hinged allow 180° opening rotation

• Doors capable of lift off at 90° opening rotation

• For non-routine service access are removeable panels

• Lube oil drain valve standard with coolant drain and valve piped to the exterior of the enclosure base

• Radiator fill cover

Security and Safety

• Lockable (keyed or padlock) doors which give full access to control panel and breaker

• Cooling fan and battery charging alternator fully guarded

• Fuel fill, oil fill and battery can only be reached via lockable access

• Optional externally mounted emergency stop button

• Designed for spreader bar lifting to ensure safety

• Stub-up area is rodent proof

• Options

• Skid base compatible

• UL Listed integral fuel tank with 24 hour running time capacity

• DC lighting package user1 Highlight 24hr Integral fuel tank user1 Text Box

GENERATOR/FUEL TANK DIMENSION 13.1' L X 4.4' W X 6.3' H

user1 Rectangle

Model Hz ekW SB Sound Pressure Levels dBA

Air Flow Rate Ambient Capability* @100% Load7m (23ft)

100% Load m3/s cfm °C °F

D40 GC 60 40 SB 67.7 1.5 3178.3 60 140

D50 GC 60 50 SB 68.6 1.5 3178.3 54 129

D60 GC 60 60 SB 69.6 1.5 3178.3 48 118

D80 GC 60 80 SB 74.9 3.5 7416.1 60 140

D100 GC 60 100 SB 76.4 3.5 7416.1 52 126

D125 GC 60 125 SB 74.8 3.4 7204.2 61 142

D150 GC 60 150 SB 75.4 3.4 7204.2 54 129

D175 GC 60 175 SB 79.3 4.1 8687.4 49 120

D200 GC 60 200 SB 79.5 4.1 8687.4 44 111

Enclosure Package Operating Characteristics A. Sound Attenuated- Level 2

LEHE20120-03

Standby ekW

Wide Skid Base

Sound Attentuted Enclosure (Steel) kg lb kg lb

40-60 92.6 204.1 178.8 394.2 80-100 96.2 212.1 189.1 416.9

125-200 115.9 255.5 274.4 604.9

B. Component Weights to Calculate Package Weight

C. Weights & Dimensions

C

BA

Sound Attenuated Enclosure on Skid Base

Sound Attenuated Enclosure on a UL Listed Integral Fuel Tank Base

BA

C

*Note: For reference only – do not use for installation design. Please contact your local dealer for exact weights and dimensions

*Cooling system performance at sea level. Consult your Cat® dealer for site specific ambient and altitude capabilities.

*Note: Sound level measurements are subject to instrumentation, installation and manufacturing variability, as well as ambient site conditions.

user1 Text Box front/exhaust user1 Text Box rear/intake /control user1 Text Box vertically radiator discharge plenum user1 Text Box Fuel hose

Enclosure Type

Standby ratings

Length, L Width, W Height, H Package Weights ekW mm in mm in mm in kg lb

Open Set on Skid (wide Base)

40 1976 77.2 1099.8 43.3 1219.2 48.0 837.7 1847

50 1976 77.2 1099.8 43.3 1219.2 48.0 931.6 2054

60 1976 77.2 1099.8 43.3 1219.2 48.0 905.8 1997

80 2098 82.6 1099.8 43.3 1343.6 52.9 950.2 2095

100 2098 82.6 1099.8 43.3 1343.6 52.9 1007.8 2222

125 2634 103.7 1300.4 51.2 1402 55.2 1405.6 3099

150 2634 103.7 1300.4 51.2 1402 55.2 1561.7 3443

175 2634 103.7 1300.4 51.2 1490.9 58.7 1696.8 3741

200 2634 103.7 1300.4 51.2 1490.9 58.7 1776.7 3917

Open Set on a UL Listed Integral Fuel Tank Base

40 2707.6 106.6 1099.8 43.3 1384.3 54.5 1536.3 3387

50 2707.6 106.6 1099.8 43.3 1384.3 54.5 1630.2 3594

60 2707.6 106.6 1099.8 43.3 1384.3 54.5 1604.3 3537

80 3035.3 119.5 1099.8 43.3 1582.4 62.3 1914.1 4220

100 3035.3 119.5 1099.8 43.3 1582.4 62.3 1972.2 4348

125 3670.3 144.5 1300.4 51.2 1757.6 69.2 3207.8 7072

150 3670.3 144.5 1300.4 51.2 1757.6 69.2 3363.3 7415

175 3670.3 144.5 1300.4 51.2 1846.6 72.7 3498.5 7713

200 3670.3 144.5 1300.4 51.2 1846.6 72.7 3578.4 7889

Sound Attenuated Enclosure on Skid Base

40 2456.1 96.1 1120.1 44.1 1330.9 52.4 1016.5 2241

50 2456.1 96.1 1120.1 44.1 1330.9 52.4 1110.4 2448

60 2456.1 96.1 1120.1 44.1 1330.9 52.4 1084.5 2391

80 2768.6 109.0 1120.1 44.1 1432.5 56.4 1139.4 2512

100 2768.6 109.0 1120.1 44.1 1432.5 56.4 1197.0 2639

125 2633.9 103.7 1318.2 51.9 1569.7 61.8 1680.1 3704

150 2633.9 103.7 1318.2 51.9 1569.7 61.8 1836.1 4048

175 2633.9 103.7 1318.2 51.9 1569.7 61.8 1971.3 4346

200 2633.9 103.7 1318.2 51.9 1569.7 61.8 2051.1 4522

Sound Attenuated Enclosure on a

UL Listed Integral Fuel Tank Base

40 2931.1 115.4 1120.1 44.1 1496 58.9 1715.0 3781

50 2931.1 115.4 1120.1 44.1 1496 58.9 1808.9 3988

60 2931.1 115.4 1120.1 44.1 1496 58.9 1783.1 3931

80 3256.2 128.2 1120.1 44.1 1673.8 65.9 2103.3 4637

100 3256.2 128.2 1120.1 44.1 1673.8 65.9 2161.4 4765

125 4008.1 157.8 1318.2 51.9 1925.3 75.8 3481.8 7676

150 4008.1 157.8 1318.2 51.9 1925.3 75.8 3637.8 8020

175 4008.1 157.8 1318.2 51.9 1925.3 75.8 3773.0 8318

200 4008.1 157.8 1318.2 51.9 1925.3 75.8 3852.8 8494

LEHE20120-03 (05/22)

www.Cat.com/electricpower © 2022 Caterpillar.

All rights reserved.

Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.

CAT, CATERPILLAR, LET’S DO THE WORK, their respective logos, “Caterpillar Corporate Yellow”, the “Power Edge” and Cat “Modern Hex” trade dress as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission

*Note: Weights include genset, enclosure (where applicable), tank and fuel (where applicable) xupe33tth Rectangle xupe33tth Line xupe33tth Rectangle user1 Line user1 Line

ASCO Power Technologies - Global Headquarters 160 Park Avenue Florham Park, NJ 07932 Tel: 800 800 ASCO www.ascopower.com customercare@ascopower.com

© 2020 ASCO Power Technologies. All Rights Reserved. Life Is On Schneider Electric is a trademark and the property of Schneider Electric SE, its subsidiaries and affiliated companies.

Publication 3040 DW. Printed in the U.S.A.

LOAD BANK RATINGS

Standard capacity ratings of:

Standard load step resolution of either 5 or 50 kW.

Select from standard three phase voltage ratings of:

Please consult factory for non-standard ratings.

Blower Motor Control External blower connection is required.

Internal blower connection to the main load bus is available. Please contact factory.

An external 120V, 1 Phase, 60 Hz supply is required for control circuit operation.

An optional step-down transformer is avail-able to provide the required control power.

The transformer receives its power from the blower motor circuit described above.

The ASCO Model 4500 are resistive, AC load banks designed for outdoor installation when up to 500 kW of resis-tive load is required.

4000 SERIES

Data Sheet Model 4500

Cooling System Approximately 13,000 CFM cooling is provided by integral TEFC or TEAO motor which is direct coupled to the cooling fan blade.

The fan motor is fully protected with fuses, motor starter contractor, and overload relay.

Operator Controls The standard load control for the 4500 is a manual 19" rack mount panel. Controls include: Power On/Off switch, Blower Start/Stop push buttons, Master Load On/ Off switch, and Individual Load Step switches. Visual indicators include: Power On, Blower On, and Blower/Air Failure.

Other control options are available, please consult factory.

Construction The 4500 is constructed using heavy gauge aluminized steel per ASTM A463. It is designed for continuous outdoor weatherproof operation. Forklift channels are provided in the base for lifting.

All exterior fasteners are stainless steel. The main input bus, load step relays, fuses, and blower/control relays are located in the main enclosure. The 4500 load bank is listed to UL standard 508A.

Finish The 4500 has a high quality baked polyester powder coated finish with a film thickness of 2.8 +/- 0.4 mils per coat. The standard color is gray (ANSI 61).

Two Year Warranty Included The equipment is covered by an industry exclusive 24-month parts and labor warranty.

loadbanks.ascopower.com • LBsales@ascopower.com customercare@ascopower.com • 1-216-573-7600

©2019 ASCO Power Technologies. Publication 5518• Rev. D

ASCO Power Technologies 6255 Halle Drive, Cleveland, Ohio 44125, U.S.A.

Model 4500 Specifications

Resistor Elements ASCO load banks use helically wound chromium alloy Helidyne elements. Ele-ments are fully supported across their entire length by segmented ceramic insulators on stainless steel rods. These elements are designed to operate at approximately 1/2 of their maximum continuous wire rating.

Elements are positioned within the cool-ing airstream for optimal performance.

Changes in resistance due to temperature are minimized by maintaining conservative watt densities.

The overall load tolerance of the 4500 load bank is -0, +5%. This ensures that advertised kW is delivered at rated voltage.

The elements are continuously rated at the specific voltage. Tests at lower volt-ages, with a corresponding reduction in overall rating, may be carried out.

Safety Features A differential pressure switch is interlocked with the load application controls to pre-vent load from being supplied if cooling air is not present.

An overtemperature switch is provide to sense the load bank exhaust. The switch is interlocked with the load ap-plication controls to disable load from being supplied if an over-temperature condition is present.

The fan motor is protected with fuses and overloads.

Major fault protection is provided by branch circuit fuse protection. Fuse protection is provided on all load steps.

The exterior of the load bank has appro-priate warning and caution statements on access panels.

Internal access is restricted by bolt on exterior panels.

The air intake on the 4500 is designed to prevent objects greater than 0.50" diam-eter from being ingested into the unit.

Horizontal air discharge is provided and exhaust air is directed downward away from personnel.

All dimensions are in inches [millimeters].

Specifications subject to change without notice.

Ambient Temperature The 4500 load bank is designed for con-tinuous duty cycle with no limitations. The ambient temperatures range is -20°F to 120°F (-28°C to 50°C).

Mounting The 4500 is designed for outdoor installa-tion on a concrete pad or structural base.

Power Terminals and Cable Entry The power terminals are located behind a removable, bolt on access panel. The 4500 has a recommended conduit entry area underneath the power terminal as-sembly to facilitate load cable installation.

Optional Accessories

Documentation - Operating Manual A comprehensive operator's manual is supplied electronically via a USB drive.

Sections include: Safety, Installation, Operation, Maintenance, and Trouble-shooting.

Testing and Standards ASCO load banks comply with NEMA, NEC, and ANSI standards. Quality control system is certified to ISO9001 standards.

Weight and Dimensions

Dimensions (approx. in/mm) Weight (approx.

lb/kg)Length Width Height

61/

46.5/

51/ 1295 1100/499

INTAKE END VIEW

AIR IN

SCREENED

(ALLOW 36" MIN

CLEARANCE FOR

MAINTENANCE)

REMOVABLE

ACCESS PANEL

AIR OUT

SCREENED

0.750 [19.00]

DIA - 4 HOLES

58.00 [1473.00]

51.00 [1295.40]

36.00 [914.00]

MIN

INPUT BUS

CONNECTIONS

FAN POWER

CONNECTIONS

CONTROL POWER

CONNECTIONS

46.50 [1181.00]

7.00 [178.00]

2.25 [57.00]

6.00 [152.00]

2.00 [51.00]

27.00 [686.00]

15.25 [388.00]

42.00 [1066.00]

2.25 [57.00]

13.00 [330.00]

EXHAUST END VIEW

LOUVERED PANEL

LOUVERED

PANEL

CONDUIT ENTRY AREA

PRIMARY CONDUIT

ENTRY AREA FOR

STRAIGHT THROUGH

LOAD WIRING

CONDUIT ENTRY AREA

OPTIONAL CONDUIT

ENTRY AREA, CONSULT

AVTRON TO REVIEW

INSTALLATION

CONDUIT ENTRY SIDE

(SEE BOTTOM VIEW)

61.00 [1550.00]

22.00 [559.00]

36.00 [914.00]

BOTTOM VIEW