USAG Natick HVAC PWS Annex H - FEB 2025.pdf

Annex H (Service 411 Facilities Maintenance Vertical): IMCOM Enterprise Base Oper-ations (BASOPS) Performance Work Statement (PWS)

Annex H

Facility Maintenance - Vertical

February 2025

Table of Contents

1.1 Overview

1.1.1 Workload Requirement

1.1.3 Diagnosis and Analysis

1.2 Components

1.3 Work Management and Control

1.3.1 Reporting Requirements

1.3.1.1 Service Plans

1.3.2 Publications and Forms

1.3.3 Facilities Maintenance Instruction

2.0 DESCRIPTION OF SERVICES

2.1 Facility Workload

2.2 Natural Gas Appliance and Equipment

2.3 Heating, Ventilation, and Air Conditioning (HVAC)

2.3.1 General

2.3.2 Seasonal Changeover Requirements

2.3.5 Related Components and Accessories

2.4 Eye Washes and Safety Showers

2.5 Roof Gutters, Drains, and Downspouts

2.6 Automatic Doors

2.7 Overhead Doors

2.8 Gates, Fences, Barriers and Dock Levelers

2.9 Air Compressors/Unfired Pressure Vessels

2.10 Plumbing

2.10.1 Components

2.10.2 Leaks

2.10.3 Sump Pumps and Septic Tanks

2.10.4 Water Heaters

2.10.5 Backflow Preventors

2.10.6 Grease Traps

2.10.7 18

2.10.8 Wash Facilities/Racks

2.10.9 Oil Water Separators

2.11 Sanitary Wastewater Treatment and Collection System (Septic Tanks)

2.12 Industrial Wastewater Treatment Plant (IWTP)

2.12.1 Components

2.12.2 Compliance

2.12.3 Reporting Requirements

2.13 Heating/Cooling Plants

2.13.1 Central Boiler Plants

2.13.2 Maintenance of Heating Plants

2.13.3 Chiller Units

2.13.4 Air Handlers

2.13.5 Condensers

2.13.6 Cooling Towers

2.13.7 Ventilation Systems

2.13.8 Fan Coil Units

2.13.9 HVAC Controls

2.13.10 Scheduled System Outages

2.13.11 Perform Seasonal Start-up and Shutdown of AC Plants and Systems

2.13.12 Freeze Protection

2.14 Winterization and De-Winterization

2.15 Reserved

2.16 Lift Stations

2.17 Sedimentation Tanks Maintenance

2.18 Electrical

2.18.1 Emergency Fixtures

2.19 Auxiliary Generators

2.19.1 Perform PM of Auxiliary Generators

2.20 Grounding Points, Lightning Protection, and Cathodic Protection Maintenance

2.20.1 General

2.20.3 Grounding Protection System (GPS)

2.20.4 Lightning Protection System (LPS)

2.20.5 Cathodic Protection System (CPS)

2.20.6 Visual inspections shall be conducted yearly

2.21 Security Systems

2.22 Fire Alarm, Fire Suppression and building Mass Notification Systems

2.22.1 Fire Alarm Systems

2.22.2 Sprinkler and Hood Suppression Systems

2.23 Reserved

2.24 PM for Barracks Buildings

2.24.1 Unscheduled Tasks

2.24.2 Scheduled Tasks/Scheduled Inspections

2.25 Elevator Maintenance

2.25.1 Elevator Inspection and Certification

2.25.2 Out of Service Time

2.25.3 Preventive Maintenance Requirements and Scheduled Maintenance Requirements

2.26 Swimming Pools and Hot Tubs

2.26.1 Circulation, Heating, and Filtration Systems

2.27 Keys and Locks

2.27.1 Key Control in Contractor Occupied Facilities

2.27.3 Lock Combinations

2.28 Food Service Equipment (FSE)

2.29 Dining Facility (DFAC) Maintenance

2.29.1 General

2.29.1.9 Pest Control

2.30 Crane and Load Scales Maintenance and Load Testing

2.30.1 General

2.30.2 Preventive Maintenance Plan

2.30.3 Crane Operator Training

2.30.4 Load scales

2.31 Glass and Glazing

3.0 Work Capability Levels

4.0 Self-Help Program

5.0 Operation and Maintenance of Energy Conservation Systems

6.0 Sign Shop Operations

7.0 Utility Systems

8.0 Uninterruptible Power Supply (UPS) Systems

9.0 Area Lighting

10.0 Utility Marking

11.0 Pumps and Pumping Stations

12.0 Natural Gas and Propane Distribution System

13.0 Propane Tanks and Distribution Systems

14.0 Water Distribution Systems

15.0 Storm Water Collection System

16.0 Preventive Maintenance of Storm Water Systems

17.0 Reporting Requirements of Storm Water Systems

18.0 Training

19.0 Certification

20.0 Other Utility Systems

21.0 Fuel Storage and Distribution Systems

22.0 Fuel-Powered Pump Maintenance

23.0 Emergency/Backup Generators (not attached to building)

25.0 Water Standpipes

26.0 Other Sanitary Wastewater Collection Systems

27.0 Fire Loop System Hydrants

28.0 Training of Personnel

Annex H (Service 411 Facilities Maintenance Vertical): IMCOM Enterprise Base Opera-tions (BASOPS) Performance Work Statement (PWS)

1.0 General Information.

1.1 Overview. The contractor shall inspect, repair and maintain all existing building, structures and their components listed in real property records. The contractor Shall sustainment of vertical facilities such as buildings, with respect to all HVAC, exclud-ing Army Family Housing.

1.1.1 Workload Requirement. The Contractor shall perform Preventive Maintenance Or-ders (PMOs), Demand Maintenance Orders (DMOs), and Operation Work Orders on all real property listed in the equipment appendix.

1.1.2 Installed Building Equipment (IBE). There is a wide variety of facilities at Natick Sol-dier System Center, with a wide variety of installed equipment. Although other sections of this PWS detail the requirements for some of these types of equipment, all of this real prop-erty IBE is the responsibility of the Contractor, DA PAM 420-11 Project Definition and Work Classification ( equipment appendix)identifies installed building equipment that is covered under this contract.

1.1.3 Diagnosis and Analysis. The Contractor shall provide follow-up analysis and diag-nosis of equipment failure as requested or shown in section 1.1.3.2.

1.1.3.1. The primary aim is to identify the factors that contributed to and/or resulted in the failure of maintenance, service, repair and/or operation of real property, infrastructure, and systems at Natick Soldier System Center, and to identify and implement actions to prevent repeated future failure due to the same failure reasons. The Contractor shall:

a. Provide a detailed description and explanation of the failure

b. Identify the root cause or causes of the problem

c. Provide possible actions and solutions to prevent future occurrences, an explana-tion of the pros and cons of these actions, a cost analysis of these actions, and the Contractor’s recommended action

d. The selection and implementation of the appropriate action

e. Review, documentation, and analysis of the outcome

f. Change in procedures, training, PWS, etc. as needed

1.1.3.2 The Contractor shall provide additional analysis or diagnosis when:

a. Directed by the Contracting Officer (KO), Contracting Officer Representative

(COR).

b. The Contractor or DPW determines it necessary due to unfavorable maintenance, repair, and

c. After catastrophic, unusual, or unforeseen events that result in adverse mainte-nance, repair, and service requirements

d. When notified of unsatisfactory performance by Garrison or other Regulatory Agen-cies (DPW, Safety, Environmental , Occupational Safety and Health Administration (OSHA), FRA, Industrial Hygiene, Directorate of Emergency Services (DES), etc.)

e. After any unplanned stoppage, outage, or failure of a Utility system or major utility system component

1.2 Components. The Contractor shall perform preventive maintenance (PM) and mi-nor repairs. Facilities and components covered under this Common Level of Support (SERVICE) include, but are not limited to, the following:

a. Administrative Buildings

b. Training Facilities

c. Maintenance Shops

d. Warehouses

e. Recreational Facilities

f. Barracks

g. Dining Facilities

h. HVAC Systems

1.3 Work Management and Control.

1.3.1 Reporting Requirements. The Contractor shall prepare and maintain all mainte-nance records, files, and reports as required herein, including the possible proper CMRA reporting.

1.3.1.1 Service Plans. Within thirty (30) calendar days of the start of the contract, the Contractor shall submit to the KO/COR a Service Plan organized by Functional Area at minimum to include all items in Equipment Appendix and frequencies indicated in Sched-uled Maintenance Task Frequency column. The Service Plan shall describe all preventive maintenance services to be performed and their frequencies as reflected by this Contract, standard operating procedures/orders, and proposed staffing.

1.3.1.1.1 High Risk Utilities Plan. Within thirty (30) calendar days the Contractor shall submit detailed management plans for high-risk utility systems (for example water, electri-cal, and gas). These management plans shall include, at a minimum, specific mainte-nance tasks and frequencies, specific instructions for accomplishment of tasks, required special tools and equipment, personnel requirements, safety requirements, emergency procedures, personnel training requirements, and documentation procedures. The Con-tractor shall submit the plan annually for Contracting Officer approval. The following plans shall be submitted as part of the Service Plan.

1.3.1.1.2 Snow and Ice Removal. N/A

1.3.1.1.3 Freeze Plan. N/A This doesn’t cover the glycol seasonal verification.

1.3.1.2 Emergency Operating Plan. The Contractor shall explain in their QC Plan how the Contractor proposes to utilize their personnel, materials, and equipment to respond to and accomplish emergency maintenance or repair work during all regular and non-regular duty hours for any utility outages. The QC Plan shall include a procedure to follow in the event of a water supply emergency due to interior or exterior secondary water distribution line ruptures, freeze-ups, or contamination of the water supply; a procedure to follow in the event of a natural gas or propane emergency; a procedure to follow in the event that a pipeline rupture; and include a procedure to follow in the event of a Uninterruptible Power Supply (UPS) or Emergency Generator outage or breakdown. The plan shall outline a contingency plan for providing repair, replacement, or backup sources such as rental units during the outage or breakdown.

1.3.1.3 Other Emergency Services to include, but not limited to:

a. Command-Directed operations support

b. Natural disasters

c. Emergency work due to loss of air conditioning or heating for data processing equipment and other temperature critical facilities

d. Emergency work due to loss of operation of refrigeration and kitchen equipment

e. Response to emergency DMOs

1.3.2 Publications and Forms. Specific publications and forms required for the accom-plishment of work described in this SERVICE are listed in Annex A

1.3.3 Facilities Maintenance Instruction. N/A

1.3.4 The Contractor shall comply with respective Reporting Requirements as specified in attached CDRL’s, and also referred to through-out the related sections of Annex A and Annex H.

2.0 Description of Services. The Contractor shall develop and implement a comprehen-sive PM and minor repair program. PM consists primarily of inspection, cleaning, lubrica-tion, adjustment, calibration, and minor part and component replacement on systems, its component equipment included at facilities which are listed in this PWS with tasks specified herein. The Contractor shall submit a Preventive Maintenance Program for this service within 10 (ten) days after receipt of approval to start. As to work that is outside the scope herein – it shall be accomplished through a submittal of respective Proposal to the govern-ment, then the appropriate CLIN within the contract will be utilized.

2.1 Facility Workload. Heating, Ventilation, and Air Conditioning (HVAC). The Contrac-tor shall provide all personnel, equipment, tools, materials, supervision, and other items necessary (labor and material) to perform Heating, Ventilation, and Air Conditioning (HVAC) Maintenance and Repairs as defined below in this Performance Work Statement (PWS), except for those items specified as government furnished property and services.

Work shall conform to the technical criteria outlined herein of the systems and compo-nents listed in this PWS.

The Contractor shall inspect, maintain, and perform repairs to all Base-Wide HVAC asso-ciated Equipment and Systems including all components/elements. Service performed by the Contractor shall be accomplished to ensure that HVAC equipment condition remains unchanged from the time of work undertaking. The quality of work accomplished shall meet the ASHRAE mandated guidelines, OSHA requirements, Army Regulations, and shall also comply with various manufacturer's requirements for such systems and related individual equipment items/elements as specified in respective Manufacturer’s Operations and Maintenance Manuals.

The Contractor shall provide, when specifically requested by the government, an addi-tional urgent/emergency repair/repair-by-replacement/new installation services for Base- Wide HVAC systems for an additional cost via submitting respective proposals, which will undergo a review process by the government, including “evaluation of the value” against Independent Government Estimate (IGE).

The Contractor shall perform tasks - to the standards defined in this contract as noted herein in this PWS and incompliance with regulation and pertinent codes as referenced in the above paragraph - for major equipment such as various Air Handling Equipment, Chill-ers, Cooling Towers and numerous secondary/auxiliary HVAC equipment/components/de-vices/accessories.

The following listing of preventive maintenance requirements is not intended to be all in-clusive. The various systems encountered will each have their own unique requirements.

Therefore, the Contractor shall use this list as a general guide only.

Services shall include maintenance, repair, repair-by-replacement, installation of new and replacement of existing HVAC systems/equipment/components/devices (refer to the fol-lowing charts, descriptions and notes below for specific equipment locations and quantita-tive tasks) but are not limited to, as follows:

a. Refrigeration Equipment/Elements compressors, evaporators, air-cooled condensers, condensing units, DX coils -re-pair and replacement of related systems/parts, Condenser’s Fans, Motors, Expan-sion Valves, Solenoid Valves, Refrigerant Pumps, Various Control Valves, Refriger-ant Distribution Units, “Heads”, Drives, Belts, and etc.; also included the external cleaning of respective outdoor Air-Cooled Condensers/Condensing Units Heat Ex-changer’s Coils/Surfaces from dust, leaves and pollen (twice-a-year) and regular fan motor bearing greasing

b. DX Split Systems – Indoor Air Conditioning/Direct-Refrigerant-Expansion (AC/DX) - Units; indoor Air handling Units (AHU’s) with Direct-Refrigerant-Expansion (DX), Chilled Water, Hot Water Coils; outdoor Condensing Units; outdoor Air-Cooled Condensers (including cleaning of respective outdoor Condenser Heat Exchanger’s Coils/Surfaces – twice-a-year).

c. Outdoor Packaged – Make-up Air Units (MAU’s – type, similar to Reznor); Heating-Gas-Fired/Cooling- DX – Air Conditioning Units (ACU’s) - repair and replacement of refrigeration equipment/elements, including cleaning of respective Condenser’s Heat Exchanger Coils/Surfaces (twice-a-year) and regular fan motor bearing greasing.

d. Refrigeration Equipment for: Kitchens, Cafeterias, Laundry Rooms, Laborato-ries, Walk-in Coolers, Walk-in Freezers, Ice Makers – service, maintenance, repair and replacement, including doors installation, refriger-ation elements, checking refrigerant pressures, refilling with refrigerant & vacuum-ing system, cleaning of respective outdoor Condenser’s Heat Exchanger Coils/Sur-faces (twice-a-year).

e. Variable Flow Refrigeration Systems (VFR’s) and their components (Outdoor

Air-Cooled Condensing Units, Indoor Ceiling “Heads”, Refrigerant Distribution Units and related controls) – Repair and replacement of refrigeration equipment/elements, cleaning of respective Condenser’s Heat Exchanger Coils/Surfaces (twice-a-year).

f. Blowers, Belts, Sheaves, Pulleys, Motors, Drive Assemblies – belonging to AHU’s, AC’s, various Fans, MAU’s, FCU’s, “Heat Pumps”, Roof-Top- Air-Conditioning Units (RTU’s), Cabinet Fan Coil Units (CFCU’s), Cooling Towers, Unit Heaters, etc. also included regular fan motor bearing greasing on all units repaired and serviced.

g. Base-Wide Instrumentation/HVAC Controls Systems – maintaining and up-grading of Central Carrier Network Controls System (CCN & Carrier BACnet Open I-VU) -replacing Hardware/Software, programming, trouble-shooting/debugging, modifica-tions, upgrades, converting “old” system into new “open” protocol type, bus-re-pair/replacement, electrical/controls wiring-interconnecting, modifying existing HVAC systems/equipment’s built-in controls, replacing “old” types of Thermo-stats/Sensors with the latest technology models; also included - repair, replace-ment of temperature control elements: actuators, controllers, master-linkage con-trols, Variable Air Volume (VAV) Zone Control Boxes/Dampers, ON/OFF Control Dampers, By-pass Control Dampers, Modulating and ON/OFF 2-way, 3-way Belimo type Control Valves, thermostats/temperature/humidity/CO2 sensors, re-lated controls wiring – all to be compatible with I-VU/CCN Carrier Open BACnet Controls System; Maintaining Microwave Links Hardware/Software – teaming up, when required, with a subcontractor – “Metro” Co. specialists (approved for work in Natick) in connection with coordinated effort of installing Microwave Links on roofs of existing buildings, also included - installing hardwiring between existing control elements located inside buildings and Microwave Links Equipment situated on roofs.

h. Ductwork Infrastructure -associated with exhaust-general-ventilation/fume-hood/kitchen, supply fresh air, re-turn, make-up, combustion air supply, combustion air intake, condensing flue ex-haust systems, involving application of a double-wall insulated duct; also included -duct cleaning either with chemicals (laboratory exhaust, kitchen exhaust), or just basic (“dust/dirt”-cleaning of ducts/diffusers/grilles/louvers) – repair, retrofit and in-stallation of new - for all above noted duct systems.

i. Insulation -for ductwork, piping (cooling, heating, condensate, process) – including application of vapor barrier where required (specifically when the outside surface of cold pipe or duct may reach a temperature equal or above the dewpoint of surrounding air), regardless of presence of any insulation).

j. Gas-fired Furnaces and Burner Assemblies – as a part of Packaged Indoor and Outdoor Air Handling Units, Roof Top Units, Fresh Air/Make-up Air Units. Boiler Systems and its respective Burners are EX- CLUDED from this PWS, since this equipment is serviced under a separate Boiler Service Contract.

k. Air Distribution Products:

air supply registers, diffusers; return, exhaust and transfer grilles; fresh air outside intake louvers – replacement, installation

l. Condensate Draining Systems:

Gravity drain pans, drains, traps – repair, install and or replace.

m. Make-up Water Systems/Over-flow Systems:

cold feed water (potable/non-potable) systems for Closed-Loop application – such as filling-up Expansion Tanks, replenishing/draining Cooling Towers etc.; also in-cluded -water regulating/control valves’ assemblies (incorporating - check valves, control valves, strainers, etc.) - repair, install, and or replace.

n. Unit Heaters:

Hot Water, Electrical, Gas-Fired/Radiant - repair, install, and or replace.

o. Fans

– various types through-out the Base: as part of ACU’s, AHU’s, RTU’s, PTAC’s, FCU’s, CFCU’s, “Heat Pumps”; also included Forced-Air Flue-Fans, Prop-through-the-wall General Ventilation Fans, Roof-Top-Mushroom, Roof-Top Utility Up-Blast Fans, Chemical Fume Exhaust Fans, Dedicated Fume-Hood/ Kitchen/Lab/Snorkel Exhaust Fans, Inline Fans, Specialty Blowers (total quantity of separate independ-ent Fans/Base-Wide – 146 units, excluding all packaged RTU’s, AHU’s and etc.) -repair, install, and or replace; also included regular fan motor bearing greasing. ( exclude hoods covered under plumbing contract.)

p. Indoor Hydronic Air Handling Units (Hydro Ahu’s) with Chilled Water and Hot Water Coils – repair, install, and or replace, including cleaning/brushing of respective coils’ exterior; also included regular fan motor bear-ing greasing.

q. Outdoor Roof Top Packaged Air Conditioning Units (RTU’s), repair and replacement of refrigeration equipment/elements, cleaning of respective Condenser’s Heat Exchanger Coils/Surfaces (twice-y-year), replacing existing RTU’s roof curbs, installing curb adapters where required, teaming up/subcontract-ing of roofing/curbing portion of work to a roofing specialists to be selected from the Natick’s contractor’s approved list; modifying respective main supply/return duct transitions/connections, modifying electrical wiring/cabling connections related to power and controls; Also included - regular fan motor bearing greasing.

r. Outdoor and Indoor Water/Cooled and Air/Cooled “Heat Pumps” (HP’s) – repair and replacement of hydronic valves, refrigeration equipment/elements, also included cleaning of respective indoor Condenser’s Heat Exchanger Coils/Surfaces (twice-a-year) and regular fan motor bearing greasing.

s. Fan Coil Units (FCU’s), Cabinet Fan Coil Units (CFCU’s) – repair, installation, replacement also included regular fan motor bearing greasing.

t. Air Filters – Replacement as scheduled for ACU’s, AHU’s, RTU’s, PTAC’s, FCU’s, CFCU’s, “Heat Pumps”; Refer to below included - specific spread-sheets – reflecting on re-quired frequency of filters replacement (averaging between 2 and 4 times a year).

u. Outdoor Air-Cooled Chillers-

(included maintenance of proper Glycol levels; winterization and cooling season start-up; related chiller’s microprocessor controls - repair/replacement; Cleaning Heat-Exchanger’s Surfaces of Air-Cooled Condensers (twice/year) and regular fan motor bearing greasing.

v. Process/Mission/Lab type local packaged Chillers – repair, maintenance, replacement, controls upgrade.

w. Open and Closed Cooling Towers – including Chemical Treatment – involving maintenance/repair/replacement of all necessary elements such as metering pumps, conductivity sensors, control valves, water make-up valves, basin electrical heaters, basin level probe/sensors, bleed-valves; towers winterization, and cooling season start-up; checking condition of tower’s fan motors, fans, belts (three times a year - spring, mid-cooling season, and fall – also included replacement when required); checking/testing for failure - elec-trical tower basin heaters (once a year, infall); checking condition of level sensors (twice-a-year); checking/testing 3-way bypass control valves operation (twice-a-year); make-up water refill assembly; water bleed assembly (twice-a-year); clean-ing towers – twice a year (spring and fall); checking glycol solution/chemical treat-ment - for closed circuit Cooling Towers’ Heat Exchanger; “Spraying” System for Closed Circuit CT’s (twice a year);

Towers spring setting it up and refill, and in fall – winterize; conducting twice-a-year sample-testing for Legionnaire bacillary traces, and if the results are posi-tive, shall undertake respective treatment with increasing of current chemicals or conducting an appropriate hydrogen peroxide treatment; also included regular fan motor bearing greasing. CAVEAT: HVAC Contractor shall hire a qualified sub-contractor specializing in such work, that subcontractor shall have an appro-priate related experience, chemical specialized lab, licensed chemists. The Contractor or Specialty Sub-Contractor shall submit, after every treatment (bi-weekly) a Report summarizing what was done and if there any issues, including the results of performed Testing Water Analysis (pH, Inhibitor, Conductivity, Chlorides, Glycol) in accordance with DD Form 1423-1, CDRL A006 (Refer Annex A, Section 6). This information shall be provided to the COR in writing by way of submitting a report - delivered in person - the same day the work took place.

x. Chemical Treatment for indoor Closed Loop Systems such as - Hot Water, Chilled Water, Dual Purpose two-pipe Heating/Cooling sys-tems – checking the operation of chemical feeders and evaluating its condition (cleanliness) of treated heating/cooling water. The Contractor or Specialty Sub- Contractor shall submit, after every treatment (biweekly) a Report summarizing what was done and if there any issues, including the results of performed Testing- Water Analysis (pH, Inhibitor, Conductivity, Chlorides, Glycol) in accordance with DD Form 1423-1, CDRL A006 (Refer Annex A, Section 6). This information shall be provided to the COR in writing by way of submitting a report delivered in person -the same day the work took place.

y. Absorption Chillers – gaskets replacement, analyzing condition of Cooling Solution, repairing/replacing refrigeration elements, tube/vessels cleaning (including Evaporators, Condensers an Absorbers by opening all respective “Heads” and replacing all gaskets), fixing Division Plates, “Eddy-Current” testing for Condensers, Evaporators, Absorbers and respective tubes, Protective Coating application, Solution Pumps/Diaphragm Valves replacement, Cooling Solution (Lithium Molybdate and Octyl Alcohol) “Cor-rection” by refilling it – once analyzed, Hot Water Metering Control Valves - repair and replacement (each chiller has one such a valve – there are a total of two). CAVEAT: HVAC Contractor shall hire a qualified subcontractor special-izing in such work, that subcontractor shall have an appropriate related experi-ence and directly employed licensed refrigeration technicians specialized inworking with Absorption Chillers. The Contractor shall submit a Report on Conditions of Chillers before and after the cleaning in accordance with DD Form 1423-1, CDRL A008. Refer Annex A, Section 6.

z. Heat Exchangers

(Plate-&-Frame and Shell-&-Tube types) cleaning (when requested/required), re-placement.

aa. Pumps –

Base-Wide (end suction, inline, double inlet, and miscellaneous types) – rebuilt on Natick site or shipped-out to the reputable/certified Outside Pump Repair Shop), in-stall, and or replace as required; also included regular motor bearing greasing; To-tal quantity of Pumps – Base-Wide – 88 units.

bb. Piping Infrastructure (steel, copper, PVC, SS - pipes) – (Propress and RLS ac-ceptable or authorized) through-out the Installation as it relates to HVAC applications, involving associated valves’ assemblies; leaks’ fixing, expansion joints replacement, piping retrofit, up-grades, modifications, new installation, also included welding (by licensed pro-fessional welder) when required.

cc. Piping HVAC Systems Components:

expansion joints, expansion tanks, air separators, air scoops, triple duty valves, suction diffusers, vibration isolators, check valves, strainers - repair, install, and or replace.

dd. Equipment pads:

concrete - for indoor/outdoor HVAC equipment, Walk-in Coolers/Freezers, double neoprene –for indoor pumps.

ee. Local Steam Humidification Systems – replacing canisters, electrodes, controls; maintaining make-up water, draining sys-tems; modifying controls; water purification/filtration; replacing humidistats; also in-cluded regular cleaning of canisters, vessels, humidification-tubes, and other ele-ments.

ff. Dehumidification/dehumidifier systems, including maintenance of respective refrigeration elements – cleaning condensate draining system/traps; repairing associated condensate drain pumping units, where applicable.

gg. Laboratory Fume Exhaust systems, including local “Snorkel” type systems, remote variable speed drives, remote ON/OFF switches, stainless steel exhaust duct, roof type utility exhaust fans (in-cluding roof curbing/flashing/watertight sealing, steel-frame-support), related con-trols – repair, replacement and new installation; Also included -regular fan motor bearing greasing.

hh. Entry Gates Buildings, Booths – Air Conditioning Systems - service, maintenance, repair and replacement, filters replacement (twice-a-year), also included maintaining outdoor Radiant Gas- Fired Unit Heaters (total of two).

ii. Through-the-wall Air Conditioning Units (PTAC’s) in Barracks and elsewhere – total amount of 50) – repair, replacement, including maintaining attached-to-PTAC Hot Water Reheat Coils; also included cleaning the entire PTAC unit, by pulling it out of the wall (twice-a year).

2.1 Builder Sustainment Management System. N/A

2.2 Natural Gas Appliance and Equipment. N/A

2.3 Heating, Ventilation, and Air Conditioning (HVAC). The Contractor shall provide Scheduled Maintenance. The Contractor shall update the PM tasks lists. Services include maintenance, repair, and installation of all components, devices, and equipment. Compo-nents include, but are not limited to: boilers, furnaces, compressors, blowers, motors, drive assemblies, control systems and wiring, freeze protection sensors, duct work, burner assemblies, temperature controls, registers, condensate and drip pans and drains, grills, evaporators, air filters, and heat/air conditioning units, ensure sequence of operations is working as designed. The Contractor shall test Emergency HVAC shut off button as part of the annual Preventive Maintenance Program to ensure proper operation and verify if HVAC units tied to the shut off button are shutting off properly and resetting to normal op-eration. Emergency Shut-off button Testing and Preventive Maintenance will be part of PM task list. Verify if proper signage for shut off switch is provided, replace if signage is failing. Work shall conform to the technical criteria in components listed in Equipment Ap-pendix.

2.3.1 General. The Contractor shall operate, maintain, repair, and replace ventilation equipment and systems for comfort and non-comfort cooling requirements. Personnel shall employ Root Cause Analysis methods of problem solving and deliver workable op-tions to the KO/COR for consideration when work is beyond demand maintenance. HVAC systems for process conditioning is included, such as exhaust fans (including bathroom exhaust systems) elevator mechanical room HVAC equipment, paint booths, welding hoods, vehicle exhaust venting systems, cold storage systems, etc.

2.3.1.1 Work Area/System Description. Systems and equipment covered under this Sec-tion include, but not limited to, systems and equipment such as:

• Air curtains

• Cold Storage Plan(walk-in and reach-in)

• MAU’s located in DFACs and throughout Natick Soldier System Center

• Filters (air and coolant).

• Bathroom-exhaust fans.

• Diffusers, grilles, registers and pipe insulation

• Comfort Heating and Cooling

• Flue vents

2.3.1.2 Inventory List. The Contractor shall update and furnish an electronic version of the updated equipment inventory list using Excel spreadsheet, which includes the data identi-fied in Equipment Appendix every six (6) months. The Contractor shall provide the up-dated listing to the KO/COR/ACOR after the first sixty (60) calendar days of the contract start. For the first submittal, the sixty (60) calendar day period shall allow the Contractor sufficient time to verify equipment quantities (HVAC equipment, evaporative coolers, etc.)

and types for the buildings listed in the Equipment Appendix. All fields in this listing shall be updated and shall include all buildings and their equipment that were not listed, or in-correctly listed, by size, type, location, etc.

2.3.1.3 Work Performance. All work shall be performed with a minimum of disruption of occupants and disturbance of other equipment that may be in the same area. Equipment removals shall be done with care and with the intent of reusing the existing ductwork, electrical connections, vents, and other tie-ins so that the costs for re-establishing func-tional operations are minimized. Reuse of tie-ins for flue vents, water piping, electrical connections, ductwork, etc., shall be made to facilitate the adaptation of existing hardware and conditions to the new piece of equipment. For example, the Contractor shall supply an extension of an electrical conduit for power if the adaptation to connect the new equip-ment requires it for proper and safe operation. Under no circumstances shall the Contrac-tor leave the condition of the mechanical equipment in an inferior state of repair or code compliance status due to adaptation problems, unforeseen conditions, or difficulties en-countered by the Contractor. Adaptation shall include compliance with current building codes to the greatest extent possible.

2.3.1.4 Priorities Facilities outlined in Priorities Facilities List. The Contractor shall re-spond to repairs as Priority 1. If the repairs cannot be completed in same day the Contrac-tor shall analyze the occupancy, use of facility and ambient temperature and provide tem-porary heating, cooling and/or ventilation equipment when needed or typically when the temperature in the building cannot be maintained at plus or minus five (+/-5) degrees of the established set-point. Contractor shall provide the COR and DPW Management hourly updates on the status of HVAC failures for critical buildings until temporary cooling/heating has been provided or the HVAC system is operational again.

2.3.2 Seasonal Changeover Requirements.

2.3.2.1 Schedule. The Contractor shall provide an annual schedule that describes their procedures to ensure seasonal changeover requirements are met within sixty (60) calen-dar days of the start of the contract and annually thereafter.

2.3.2.2 Spring Changeover. Spring startup/shut-down shall be accomplished during a two

(2) week period, usually in the month of March or April, and will address the start-up of cooling systems that provide summer cooling only and the shut-down of heating systems that provide winter heating only. Seasonal weather variations may require the startup/shutdown to take placer earlier or later in the season.

2.3.2.3 Fall Changeover. Fall shut-down/startup shall be accomplished during a two (2) week period, usually in the month of September and or October, and will address the shut-down of cooling systems that provide summer cooling only and the start-up of heat-ing systems that provide winter heating only.

2.3.3 Chemical Treatment. The Contractor shall implement a program of chemical treat-ment for open and closed systems (boilers, chillers and cooling towers) specifically de-signed to protect the equipment, to maintain efficiencies, to conserve water and to meet State and Federal Regulations. The Contractor shall perform weekly testing for cooling tower water and add chemicals as needed. The Contractor shall maintain files of inspec-tions and chemical usage for cooling towers, condensate and chilled water systems in-cluding laboratory analysis of all HVAC systems receiving chemical treatment. Records shall include building number, date chemicals were applied, description of chemicals used, quantity of chemicals used per system to maintain standards, chemical level read-ings in system before and after minor adjustments, date of inspection check and adjust-ment, results of inspection and name of persons doing the inspections and adjustments.

2.3.4 Building Operations & Controls

2.3.4.1 System Controls. Systems Controls may consist of central, computer-controlled diagnostics Carrier I-vu and operation center, or local (at the building) computer controls or manual controls and all associated hardware and software intended to provide efficient control of all HVAC systems.

2.3.4.1.1 Monitoring Controls. The Contractor shall manage building heating / cooling / operational schedules, address monitoring system alarms, view building operations and analyze potential trends and issues, take trouble calls, manage databases, and repair control systems. The Contractor shall monitor the UMCS and Metasys front-end in the Building Operations Center during normal duty hours and being able to troubleshoot and support standard HVAC equipment. Additionally, the Contractor shall manage the online and offline status of buildings and upon receipt of Priority 1 DMOs, take steps to ensure offline buildings get back online as soon as possible.

2.3.4.1.2 Controls Technicians. The Contractor shall operate and manage all aspects of HVAC control of the I-vu to troubleshoot and repair HVAC controls (centrally controlled, or locally controlled). These Control Technicians will be dedicated to the I-vu and Buildings associated with I-vu and Controls issues arising from issues seen and needed to be re-solved associated with the I-vu.

2.3.5 Related Components and Accessories.

2.3.5.1 The Contractor shall be responsible for all related items of equipment not previ-ously described or identified but that are connected-to and an integral working part of HVAC systems. The Contractor shall repair and maintenance electric motors (Repair or Replacement of motor or pumps shall be high efficiency Energy Star Equipment), pumps, shaft couplings, variable-frequency-drives, drive pulleys, drive belts and belt safety- co-vers. The Contractor shall provide maintenance and repairs to, ladders, stairs, platforms and towers that support HVAC mechanical equipment as well as catwalks or hand railing attached to the HVAC platforms or towers.

2.3.5.2 The Contractor shall Test & Balance up to 40% of existing air distribution sys-tems, Flow Balance of chilled/hot water distribution systems, or Commissioning reports per year. The COR will provide the building and the Contractor shall provide a proposal with a detailed scope of work to be performed and a detailed cost estimate. The work will be accomplished via a PWO if funding is available.

2.3.5.3 Equipment/Accessories inside of Ductwork. The Contractor shall provide mainte-nance and repair to HVAC system equipment installed inside ductwork such as balancing dampers, motorized dampers, control sensors, re-heat systems, unit heaters, supply fans, return fans, exhaust fans, fire alarm system duct detectors, fire system dampers-shutters-fusible links, air leaks in duct-work (loose clean-out doors, warped surfaces, broken joints, holes worn in elbows or other parts, and poor connections leading from or returning to fans, including flexible connections), duct hangers and supports

2.4 Eye Washes and Safety Showers. N/A.

2.5 Roof Gutters, Drains, and Downspouts. N/A

2.6 Automatic Doors. N/A

2.7 Overhead Doors. N/A

2.8 Gates, Fences, Barriers and Dock Levelers. N/A

2.9 Air Compressors/Unfired Pressure Vessels. N/A ( NSSC Plumbing Contract )

2.9.1 Refrigerated Air Dryer. The Contractor shall inspect refrigerated air dryers, if pre-sent, for proper operation and seek authorization for non-routine maintenance repairs.

2.9.2 Compressor Storage Tanks. N/A (NSSC Plumbing Contract)

2.10 Plumbing. N/A (NSSC Plumbing Contract)

2.10.1 Plumbing Components. N/A (NSSC Plumbing Contract)

2.10.2 Plumbing Leaks. N/A (NSSC Plumbing Contract)

2.10.3 Sump Pumps and Septic Tanks. N/A (NSSC Plumbing Contract)

2.10.4 Water Heaters. N/A (NSSC Plumbing Contract)

2.10.5 Backflow Preventors. N/A (NSSC Plumbing Contract)

2.10.6 Grease Traps. N/A (NSSC Plumbing Contract)

2.10.7 Restroom Fixtures. N/A (NSSC Plumbing Contract)

2.10.8 Wash Facilities/Racks. N/A

2.10.9 Oil Water Separators. N/A

2.11 Sanitary Wastewater Treatment and Collection System (Septic Tanks). N/A

2.12 Industrial Wastewater Treatment Plant (IWTP). N/A

2.13 Heating/Cooling Equipment. See attached Equipment Appendix

2.13.1 The Contractor shall inspect each of the listed herein air conditioning and refrigeration units twice yearly. Inspections shall be made Monday through Friday between the hours of 7:00 and 15:30. During each inspection the contractor shall examine, clean, adjust, lubricate and repair all parts and equipment for proper maintenance in accordance with the preventive maintenance schedules as listed.

All equipment shall be inspected and maintained per the latest version of US Army Technical Manual and shall include but not limited to:

A. Wiring and Electrical Controls

1) Loose connections

2) Charred, broken or wet insulation

3) Short circuits

B. Temperature and Humidity Controls

1) Improper settings

2) Loose connections

3) Improper operation shall be noted in observing respective equipment run through complete cycle C. Air Ducts, Dampers, Registers, Grills, Louvers, and Bird and Insect Screens

1) Soot, dirt, dust, pollen, and other deposits

2) Leaks, broken, loose or missing connections and parts

3) Excessive vibration

4) Material defects

5) Defective operation of moveable parts

6) Improper seasonal or operating settings of dampers

D. Thermal Insulation and Vapor Barriers

1) Wet, damaged or missing

2) Broken tie wires

3) Loose bands

4) Torn canvas jackets

5) Torn vapor barrier

E. Air Filters

1) Dust, grease, other deposits

2) Missing

3) Improper fit

F. Piping

1) Leaks

2) Corrosion

3) Material defects of fittings, copper tubing, and steel piping

G. Scheduled visits shall include

1) Cleaning of the exterior of units.

2) Inspecting for excess vibration and noise and adjusting as required.

3) Adjust, align and replace fan belt(s).

4) Verify correct amount of refrigerant, (if deficiency found)

A. leak test system, B. repair leak, evacuate and recharge system as required.

5) Inspect fan bearings and lubricate as required.

6) Inspect the operation of thermostat control.

7) Inspect operation of condenser water valve.

8) Clean fan blades, filter chamber, and replace air filters as necessary.

9) Clean condensate drain pan, drain lines and drain trap.

10) Inspect return and make up air grills and clean as needed.

11) Inspect operation of defrost system.

12) Inspect operation of high- and low-pressure controls.

13) Inspect and clean air-cooled condensers.

2.13.1 Chiller Units. Listed in the Equipment Appendix

2.13.1.1 Air Cooled Chillers Quarterly Operational Inspections

a. Check and calibrate control switches pressure and temperature.

1) Pressure: High pressure, Oil pressure, Minimum oil pressure

2) Temperature: Refrigerant low temperature cut out, Chilled water load recycle, Oil heater temperature thermostat.

b. Check and calibrate all gauges and thermometers.

1) Gauges: Cooler, condenser and oil pressure

2) Thermometers: Chilled water inlet and outlet, Condenser water inlet and outlet

c. Inspect and tighten all electrical connections on the following:

1) Compressor motor magnetic starter

2) Oil pump motor magnetic starter

3) Chilled water pump motor magnetic starter(s)

4) Chiller control panel

d. Check and record voltage and amperage on all motors in above listed items and record.

e. Inspect oil cooler solenoid strainer and temperature-controlled water regulating valve.

f. Set temperature-controlled water regulator to control oil temperature when com-pressor is in operation.

g. Check operation of chiller and operating controls.

h. Check operation of control module:

1) Chilled water set point.

2) Full load amperage calibrations.

3) Demand limit set point.

i. Check the operation of Flow Switch.

j. Check the level of Glycol concentration and adjust to minus 10.

2.13.1.2 Absorption Chillers (total of two) – Annual Cleaning:

a. Draining

b. Opening Condenser heads

c. Cleaning Condenser Heads

d. Cleaning (internal turbo-brush) of condenser tubes

e. Replacement of gaskets (all heads)

f. Cleaning of “hot” and “chilled” heads and respective tubes

g. Solution sample testing

h. Reporting - The Contractor shall submit a Report on Conditions of Chillers before and after the cleaning in accordance with DD Form 1423-1

2.13.4 Air Handlers. Listed in the Equipment Appendix

All Air Handling Equipment – AHU’s, RTU’s, FCU’s CFCU’s, MAU’s, PTAC’s:

It’s primarily involving inspection, cleaning, lubrication, adjustment, calibration, and minor part and component replacement (e.g. filters – as specified above for AHU’s, belts, hoses, fluids, oil and grease, and refrigerant) as required to minimize malfunctions, breakdowns, the deterioration of equipment; and the identification of and/or performance of any repairs required to bring the equipment up to the manufacturer’s operating standards.

2.13.4.1 Air Handling Units & Fan Coil Units for Air filter and belt Replacement

The Contractor shall furnish all labor, supplies, materials and equipment to perform air filter changes in accordance with the specifications of this contract. All work is to be performed at the U.S. Army Natick Soldier Systems Center. All filters shall be changed or maintained a minimum of 3 times per year in 4-month intervals (unless conditions require them to be changed out sooner).

2.13.4.2 Materials and Equipment:

The Contractor shall provide all appropriate filters to collect dirt and dust and provide clean air to all areas of the buildings listed in the contract. Contractor shall be required to supply sufficient and necessary supplies and equipment for satisfactory completion of this contract including, but not limited to, roll media, ladders, tools, etc.

2.13.4.2.1 Contractor to provide all filters including but not limited to:

a. Disposable Panel Filters

b. Extended Surface Pleated Filters

c. Extended Surface Positive Filters

d. Dri-pak Filters

e. Grease Filters

f. Carbon Filters

2.13.4.2.2 Special Instructions:

The Contractor shall change all the filters in one building entirely before moving on to the next building. All work shall include the removal of the dirty filters, instal-lation of clean air filters, cleaning of grease filters, making filter recommendations, and the removal of dirty filters from the premises. Work shall be done during nor-mal duty hours, 7:00am to 5:30pm Monday through Friday unless otherwise agreed between the contractor and the COR. The Contractor shall notify person-nel working in the room 4 to 5 days in advance of the filter changes. The Contrac-tor shall provide a list of the filters replaced in each unit of every room. The Gov-ernment may require continued performance of any services with the limits and at the rate stated up to 6 filter changes per calendar year.

2.13.5 Condensers. See Equipment Appendix

2.13.5.1 Condensing Units-Air Cooled:

a. Review manufacturer’s recommendation for start-up.

b. Energize crankcase heater per manufacturer’s recommendation for warm-up.

c. Visually inspect for leaks.

d. Inspect electrical connections, contactors, relays, and operating/safety controls.

e. Check vibration eliminators. Replace and adjust when authorized.

f. Check compressor oil level.

g. Change oil and refrigerant filter drier when authorized.

h. Check and test all operating and safety controls.

i. Check operating conditions. Adjust as required.

j. Clean condensers annually with soap and water.

2.13.6 Package Air Conditioning Systems: See Equipment Appendix a Lubricate fan bearings per manufacturer’s recommendation.

b Lubricate motor bearings per manufacturer’s recommendation.

c. Check belts and sheaves. Replace and adjust when authorized.

d. Check coils. Straighten fins as required.

e Check and clean drain pan and drains.

f. Inspect filters and change per filter schedule above.

g. Check motor operating conditions.

h Inspect electrical connections, contactors, relays, and operating/safety controls.

i. Check compressor oil level. Check crankcase heater operation.

j. Start compressor. Check operating conditions and adjust as required.

k. Check refrigerant charge.

l. Inspect all temperature, safety, and operational controls.

m. Flow water through all condensate pumps to ensure proper operation of water supply, drain lines, and floats.

n. Check infrared bulb operation.

o. Check accuracy of all sensors and calibrate as needed

2.13.7 All other AC Equipment: See Equipment Appendix

a. Check compressor operation

b. Turn power off and on

c. Check piping and valves for refrigerant leaks; tighten loose connections

d. Inspect AHU's and condenser motors for: excessive noise and heat

e. Lubricate shaft bearings and motors (AHU and condenser)

f. Check AHU and condenser fan belts for - wear, proper tension and alignment;

adjust tension and/or alignment if required; change belt if worn out

g. Inspect fans for bent blades or unbalance (AHU and condenser)

h. Check all electrical controls for loose: connections and frayed wires; tighten loose connections

i. Visually inspect condenser and evaporator coils

j. Clean coils and fans using detergent sprayer and hose

k. Check for proper refrigerant charge and record readings and indoor air and out-door air temps

l. Check defrost circuit (includes: switching the reversing valve from heat to cooling)

m. Check electric heat strips for proper operation and amps while in defrost

n. Check all relays for proper operation

o. Check thermostats for calibration and proper operation, adjust if necessary

p. Recharge compressor

q. Check unit for corrosion

r. Clean, prime and paint area of corrosion

s. Check condensate drain and drip pan cut off units for proper operation.

t. Clean and flush out drip pan and condensate line

u. Check for fuel system leaks

v. Check pilot on gas burner; adjust if required for proper operation

w. Check gas burner for proper flame; adjust if required for property operation

z. Check automatic controls for proper operation. Check draft diverter and clear openings if clogged (gas burners)

aa. Check gas pressure regulator by using water column pressure gauge

ab. Check condition of flue pipe, damper, and chimney

ac. Change all air supply and return filters

ad. Check any other safety features not otherwise addressed herein for proper op-eration

ae. Conduct other routine maintenance as recommended or required by the manu-facturer

af. Adjust all controls to specifications to obtain optimum energy efficient operation

ag. Clean up area around unit.

2.13.8 Cooling Towers. See Equipment Appendix

2.13.8.1 General Information

a. Remove all debris from within and around unit and flush as required (Annually).

b. Check and clean strainers, bleed overflow and drain (Annually).

c. Lubricate fan and motor bearings per manufacturer’s recommendation.

d. Check motor mounts. Adjust as required.

e. Inspect electrical connections, contactors, relays and operating/safety controls.

f. Inspect motor operating conditions.

g. Clean float valve assembly and check for proper operation.

2.13.8.2 Twelve Month Interval

a. Inspect Shell Surfaces for Leaks, Warping or Damage

b. Remove Drift Eliminators, Inspect and Clean

c. Remove Fill Media, Inspect and Clean

d. Inspect Rotary Spray Nozzles, Clean Any Blockage

e. Inspect and Clean Fan Guards

f. Inspect Fan Blade Condition and Clearance

g. Inspect Fan Motors, Check Electrical Connections and Amps

h. Inspect Mechanical Float Valve

i. Inspect and Clean Sump Screen

j. Inspect and Clean Basin Immersion Heater

k. Inspect and Clean Water Collection System

2.13.8.3 Six Month Interval:

a. Inspect Rotary Spray Nozzles, Clean Any Blockage

b. Inspect & Clean Fan Guards Inspect Fan Blade Condition and Clearance

c.