Sec_C-5.5_HVAC_SYSTEMS_OPERATION_ _MAINTENANCEb.pdf

HVAC Systems Operations and Maintenance

Functional Area 5.5

HVAC SYSTEMS OPERATION AND MAINTENANCE

Table of Contents

HVAC SYSTEMS OPERATION AND MAINTENANCE

5.5.1 INTRODUCTION

5.5.2 SCOPE OF SERVICES

5.5.2.1 Work Area and System Description

5.5.2.2 Work Management and Control

5.5.3 SCHEDULED TASKS

5.5.3.1 Maintenance and Operation of the Energy Management and Control System (EMCS) and the FM Load Management System

5.5.3.2 Boiler Plant Operations

5.5.3.3 Water Testing and Treatment

5.5.3.4 Air Conditioning to Heat and Heat to Air Conditioning Changeover

5.5.3.5 Cooling Plants and Systems

5.5.3.6 Heating Plants and Systems

5.5.4 UNSCHEDULED TASKS

5.5.4.1 Unscheduled Repair

5.5.4.2 New Equipment Installation and Inspection

5.5.4.3 Equipment Modifications

5.5.4.4 Equipment and System Removal

5.5.4.5 Reduced Power Response

5.5.4.6 Unscheduled Air Conditioning to Heat Changeover

5.5.4.7 Freezing Weather Maintenance

Exhibit Title

List of Technical Exhibits

5.5-001 Required Scheduled Tasks 5.5-002 Chlorofluorocarbon (CFC) Control 5.5-003 List of Buildings Requiring Changeover 5.5-004 List of Buildings Requiring Cooling Plant Maintenance and Monthly Filter Changes 5.5-005 Building List for Heating Plants and Systems 5.5-006 Building Filter List

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Functional Area 5.5

HVAC SYSTEMS OPERATION AND MAINTENANCE

5.5.1 INTRODUCTION

The Contractor shall operate, maintain, repair, and replace heating, ventilating, and air conditioning (HVAC) equipment and systems. This shall include, but not be limited to, the handling of all fuels, lubricating oils, chemicals, auxiliary machinery, and boiler water treatment; attending all boiler fires to maintain steam pressure as required; and controlling the operation of chillers and cooling towers, as required by the KO. The Contractor shall be responsible for operating, maintaining, repairing, and replacing all air distribution systems (e.g. air handling units, exhaust fans, and fan coil units), evaporative cooling equipment, vacuum systems, chilled water pumps, and hot water pumps. The Contractor shall also be responsible for installing and inspecting new equipment and systems in accordance with manufacturer recommendations and all other applicable codes and regulations. Qualified personnel in accordance with Fort Benning’s Title V Air Operating Permit, and all other applicable laws, regulations shall perform all work, and Government-developed annual and long range plans. Technical Exhibits provide expanded information for this Functional Area.

5.5.2 SCOPE OF SERVICES

5.5.2.1 Work Area and System Description

Systems and equipment covered under this Functional Area include, but are not limited to, the following:

• Air conditioners

• A i r c u r t a i n s

• Air dryers

• Air handling units

• Blowers

• Chilled water coils

• Chillers and associated components

• Cold storage facilities (walk-in and reach-in)

• Combination units (cooling/gas fired heating)

• Compressed air and compressed gas equipment

• Compressors (reciprocating or hermetic)

• Condensate pumps and tanks

• C o n d e n s e r s

• Building Controls (electrical, mechanical, and pneumatic)

• Coolers

• Cooling towers and associated components

• Evaporative condensers (open or closed-tube)

• Evaporator s

• Exhaust fans

• Expansion tanks

• Fan coil units

• Filters (air and coolant)

• Guards, casings, hangers, supports, platforms, and mounting belts

• Heat recovery equipment

• Heaters

• Heating coils

• Hot water boilers and associated components

• Humidif ier s

• Induction units

• I nstruments

• Mechanical ventilation and exhaust equipment

• Mixing b o x e s

• Motors and drive assemblies

• O i l t a n k s

• Paint spray exhaust equipment

• Pumps

• Sand/grit blast and dust collection equipment

• Steam boilers and associated components

• Thermostats

• Vacuum equipment

• Wiring for HVAC systems

5.5.2.2 Work Management and Control

5.5.2.2.1 Compliance. While performing any work on HVAC systems, the Contractor shall comply with all applicable manufacturer recommendations and American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE);

Occupational Safety and Health Administration (OSHA); Environmental Protection Agency (EPA); National Fire Protection Association (NFPA); 29 CFR; 49 CFR;

American National Standards Institute (ANSI); Uniform Plumbing; and National Electrical codes, regulations, and standards.

5.5.2.2.2 Reporting Requirements. The Contractor shall prepare, submit, and maintain all records and reports as specified herein and in accordance with Contract Data Requirement Lists (CDRLs) in Technical Exhibit 1-004.

5.5.2.2.3 Publications and Forms. Specific publications and forms required for the accomplishment of work described in this Functional Area are listed in Section C-6.

5.5.2.2.4 Conservation of Energy. The Contractor shall observe and test the efficiency of the operating equipment for the conservation of energy. The Contractor shall maintain HVAC system outputs as required by ASHRAE for each type of equipment. The Contractor shall ensure that minimum air changes are effected in accordance with ASHRAE requirements and based on comparisons of the temperatures of the outside air, the return air, and the mixed air.

5.5.2.2.4.1 The Contractor shall be responsible for programming Energy Management and Control System (EMCS) computers (including the FM Load Management system), damper controls, pressure, and air quality in such a manner as to ensure energy efficiency, the health of building occupants, and in accordance with Fort Benning energy policies.

5.5.2.2.5 Equipment Not in Use. The Contractor shall maintain all boilers and chillers that are not currently in use in a ready condition. If any boiler or chiller cannot be placed on line within eight hours, notification, including the probable cause, shall be given to the KO.

5.5.2.2.6 Emergency Notification. Operational emergencies, such as ruptured mains, loss of boilers, and loss of power, which reduce the steam rate by 15% or boiler pressure by 20% or more for a period extending beyond 30 minutes, shall be reported within 30 minutes of occurrence to the KO, together with identification of the probable cause and the estimated time required before full pressure and steam rate can be restored.

5.5.2.2.7 Noted Defects. The Contractor shall correct defects noted while maintenance is performed, but shall ensure minimum downtime when more complex work is required.

5.5.2.2.8 Use of Lubricants. The Contractor shall use types, grades, or weights of lubricants that are generally acceptable within the trade to perform all lubrication of equipment unless special types, grades, or weights are specified.

5.5.2.2.9 Chlorofluorocarbons (CFCs). The Contractor shall control all CFCs and prevent the unintentional release of CFCs to the atmosphere. Personnel with the appropriate certification to handle CFC materials shall only accomplish CFC exchange. CFC control shall be in accordance with EPA regulations. Additional instructions are shown in Technical Exhibit 5.5-002.

5.5.2.2.10 Marking. The Contractor shall mark and color code all new or unmarked exposed piping or conduit for chilled water, heating water, domestic water, oil, electric, natural gas, refrigerant, and all related HVAC systems. Any new marking or renewal of obscure or faded markings shall conform to Installation policies.

5.5.2.2.11 Thermostat Setting. The Contractor shall set the thermostats in non-exempt buildings at no lower than 78°F for the cooling season, and no higher than 68°F for the heating season, unless otherwise directed by the KO.

5.5.3 SCHEDULED TASKS

The Contractor shall perform the tasks described below on a recurring or scheduled basis and record the work under approved Standing Operating Orders (SOOs). Preventive maintenance and other scheduled task frequencies that apply to this Functional Area are presented in Technical Exhibit 5.5-001. A partial list of installed serviceable equipment located at Fort Benning and its properties is provided in Technical Exhibit 5.1-001. If a requirement for further repair work on any equipment is identified during the performance of scheduled tasks, the Contractor may be required to accomplish such work on an approved Service Order (SO) or Individual Job Order (IJO).

5.5.3.1 Maintenance and Operation of the Energy Management and Control System (EMCS) and the FM Load Management System. Contractor shall provide comprehensive maintenance for the UMCS and all of its associated monitor and control points, up to but not including final controlled elements. Final elements such as fans, fan coil units, control valves, heat exchangers, pumps, variable speed drives etc. will be the responsibility of others.

5.5.3.1.1 On a semiannual basis, the Contractor shall inspect the head-end of the EMCS (DDC) Controller at each building and/or facility as follows: verify operation of diagnostic LED’s for equipment status, visually inspect all electrical connections, test for correct voltage levels and continuity (as applicable); inspect for corrosion and correct voltage in the battery back-up system; inspect equipment for physical damage (repair/replace as applicable); verify IP addresses to include verifying proper network communication (if applicable) and test for proper operation between controller and the EMCS control center;

and check communication cables on all controllers and monitored equipment for damage.

Note that some maintenance performance items may not apply for some controllers based upon the controller's design/purpose.

5.5.3.1.2 The contractor shall operate and monitor the Frequency Modulation (FM) Load

Management System that is a computer based system located in Bldg 470. This system includes a computer/operating system, interface processor, transmitter site and FM receivers integrated into controls systems throughout the installation. This system by operator interface has the ability to run time of schedules and is the installation's primary controller during electrical load shedding periods. Method of controlling is by transmitting a unique code to a receiver (s) that can decode this signal to activate or de-activate the device (s) being controlled. The FM Load Management System currently controls air conditioning systems, heating systems, school crossing lights and field lighting and can be interfaced with all types of control systems where a "off-on" (binary) controller is required. Any problems experienced with the operation of the system are to be brought to the attention of the KO immediately.

5.5.3.1.3 Contractor shall utilize EMCS equipment resources and provide information as required to assist other service technicians in troubleshooting malfunctions and failures in equipment controlled or monitored by the EMCS. This shall include field visits, configuring the EMCS software, and producing logs, trends, and graphs. Maintenance and repair of the UMCS shall include, but not be limited to, host computer(s), printers, communications equipment, communications cable, control panels, sensors, transmitters, signal wiring, relays, and actuators used to enable the EMCS to effectively control or monitor HVAC equipment. After completing repairs that affects the integrity of the UMCS system, the contractor shall test the equipment and/or system. The Contractor shall correct deficiencies that are found before bringing the equipment or system on line. Repair and testing shall be accomplished during normal duty hours unless directed otherwise by the Contracting Officer. Where performance of the equipment is critical, the system shall be tested and proofed at the time of the repair.

5.5.3.1.4 The contractor shall develop a list of maintenance duties/tasks. It shall be incorporated in a Standard Operating Procedure (SOP) and be submitted and approved by the Contracting Officer. The list and SOP shall be updated periodically as needed and resubmitted for approval.

Contractor is expected to perform all action necessary to maintain the EMCS.

5.5.3.1.5 Contractor shall perform maintenance and repair consisting of minor and major, routine, urgent, and emergency repairs to the UMCS as necessary for optimal efficiency and performance. Contractor shall provide, install, and configure updates and additions to software/firmware in EMCS equipment as required.

5.5.3.1.6 Contractor shall repair the EMCS devices upon notice of failure by operators or others, and when identified during scheduled maintenance. This includes, but is not limited to, servers, computers and peripherals, software maintenance, transmission equipment, control panels and all wiring, sensors and control devices.

5.5.3.1.7 Contractor shall verify communications from the local control devices to the control room, calibration, and proper operation of end devices in buildings. This includes buildings incorporating interfaces. Calibration shall be accomplished by comparing the actual value measured in the field with that displayed on a terminal. Proper operation verification shall be accomplished by observing that the final element or controlled equipment state is consistent with commands issued from the control room. A written report of discrepancies shall be furnished the Contracting Officer.

5.5.3.2 Boiler M a i n t e n a n c e

The Contractor shall perform maintenance and operate on a l l boilers located on For t Benning , Camp Merr i l l and Camp Darby as needed in accordance with AR 420-49, ASME, Federal, State and Local Regulations, a nd the Clean Air Act. On a routine basis, the Contractor shall perform a visual inspection of all equipment to ensure proper operation, appropriate pressures, and the absence of apparent defects. In addition, the Contractor shall read the gauges and charts on all equipment and record the results in the approved log book to include, but not be limited to, gas and water consumption. The Contractor shall blow down the sight glass, water columns, and low water cut out to ensure that low water safeties are working; check the oil and grease in all operating equipment; and check the boiler flame safety control by shutting the fire off. Class A and C inspections are required for high-pressure boilers greater than 15 psi.

5.5.3.2.1 Weekly Inspections. On a weekly basis, the Contractor shall inspect the air compressors and perform an inventory of boiler chemicals; grease the valves and operating equipment; complete combustion efficiency tests; and check the levels in the fuel oil tanks. The Contractor shall record results in the logbook.

5.5.3.2.2 Monthly Inspections. The Contractor shall inspect and maintain the following units located in the boiler plant on a monthly basis: surge tank; central plant valve;

air compressors; large dual fuel boilers; chemical pumps and tanks; de-aerator tank;

electric feed water, electric fuel oil service, and pumps; forced draft fan; and fuel oil strainers. In addition, on a monthly basis, the Contractor shall prepare the boiler water samples to be sent for testing to an independent testing laboratory.

5.5.3.2.3 Water Testing of Boilers. Every eight-hour period, the Contractor shall sample and test the boiler water and condensates. These test results shall be documented in the appropriate operator log. Based upon these tests, the Contractor shall adjust the chemical treatment of each boiler.

5.5.3.2.3.1 Annual Overhaul and Class “A” Boiler Inspection. The Government will designate a third party to conduct the Class “A” Inspection, and the third party will issue its report directly to the KO. The third party and the contractor shall coordinate the inspection schedules. The Contractor shall perform the following work on all boilers to prepare for the Class “A” Inspection.

Remove boiler from service.

Cool down boiler.

Open fire side.

Clean tubes, fire box, and tube sheets.

Remove manhole covers.

Clean waterside.

Dismantle and clean low water cutoffs.

Remove piping to operating and safety controls.

Remove plugs from cross connections.

Place boiler back in operation.

Check boiler operation.

Check boiler safety and operating controls.

Perform a hydrostatic test.

The Contractor shall then overhaul boiler components as necessary so that the boiler meets start-up specifications. Overhaul shall be performed via SO or IJO, upon receipt of a valid work document.

5.5.3.2.3.2 Annual Class “C” Boiler Inspection. The Government will designate a third party to conduct the Class “C” Inspection, and the third party will issue its report directly to the KO. The Contractor shall support the third party as necessary to assist in the inspection. The Contractor shall repair or replace worn or otherwise defective components upon receipt of an approved SO or IJO.

5.5.3.2.4 Feed water Pump Preventative Maintenance. The Contractor shall perform the following tasks on electric feed water pump systems at the Boiler Plant at the frequencies specified:

Visual inspection on each shift.

Grease pumps each week.

Perform amp test each month.

5.5.3.2.5 Burning of Oil. The Contractor shall burn oil in the boilers in accordance with State permits.

5.5.3.2.6 Notification of Gas Curtailment. Fort Benning is subject to natural gas curtailments imposed by the Installation’s natural gas provider. Upon notification of gas curtailment, the Contractor shall switch to No. 2 Fuel Oil by the specified time.

The Contractor shall maintain all equipment in a ready state to ensure an efficient transition. The Contractor shall continue to burn fuel oil until directed by the KO.

5.5.3.2.7 Record keeping. The Contractor shall maintain daily records of fuel used in each boiler and the propane peak shaving plant. From these daily records, the Contractor shall prepare the Fuel Consumption Report to meet state permit requirements (CDRL 505R001). This report shall be submitted to the KO by 10 Jan (for records from 1 Jul – 31 Dec) and 10 Jul (for records from 1 Jan – 30 Jun).

5.5.3.2.7 Treatment of Hot Water Boilers. Contractor shall add corrosion protection to all hot water boilers. Contractor shall conduct quarterly analysis of the boilers and add chemicals as needed to maintain proper concentration of the corrosion inhibitors. This requirement shall be completed on a SOO.

5.5.3.3 Water Testing and Treatment

The Contractor shall conduct water tests of HVAC equipment as designated in the following paragraphs or as required by the KO. If tests show abnormalities, the Contractor shall take corrective action. For all systems, the chemical feed rate and bleed-off shall be adjusted as necessary, a record of chemicals used, test results, and an analysis of findings shall be kept up to date, and chemical feed equipment shall be maintained. The Contractor shall conduct sample analysis on-site.

5.5.3.3.1 Condensate Returns. Condensate samples shall be taken daily for boilers in operation. The Contractor shall test pH and conductivity. The Contractor shall maintain condensate pH levels between 7.5 and 12.5. If conductivity is greater than 20 to 25 micro ohms, the sample shall be tested for calcium hardness. Iron shall be tested at condensate returns annually. Only a generic neutralizing amine shall be used.

5.5.3.3.2 Steam Boilers. The following parameters shall be tested and analyzed on steam boilers: hydrate alkalinity, phosphate, specific conductance (conductivity), total dissolved solids (TDS), silica, make-up and feed water hardness, causticity (23 to 200 ppm), phosphate (30 to 60 ppm), sulfite (20 to 40 ppm) on boilers with de-aerators, and polymers (2 to 5 ppm). Hydrate alkalinity shall be tested by barium chloride precipitation or determined by the (2p)-M calculation form conventional alkalinity. The Contractor shall also test de-aerators to ensure that oxygen is less than seven parts per billion. Unless otherwise stated, all steam boilers in operation shall be tested and treated weekly. All chemicals used in boilers shall be generic.

The Contractor shall record the results and take appropriate actions if deficiencies are discovered.

5.5.3.3.3 Reserved.

5.5.3.4 Air Conditioning to Heat and Heat to Air Conditioning Changeover

The Contractor shall maintain a report of all work performed for changeover services, including date, hours expended, equipment name and number, and facility name and number, and shall indicate any needed repairs submitted via SO. Technical Exhibit 5.5- 003 provides a partial list of the buildings requiring changeover at Fort Benning. See para. 5.2.2.2.4

5.5.3.4.1 Heat to Air Conditioning. The Contractor shall begin start -up of all applicable cooling systems and shutdown of all applicable heating systems, historically on approximately 15 April to 15 May, and complete the start-up within 15 calendar days. Climatic variations may require the KO to direct changeover of seasonal equipment at dates earlier or later than those specified. During changeover, the Contractor shall take corrective action via SO or IJO if any operational deficiencies are identified.

5.5.3.4.1.1 Shutdown of Hot Water Boilers. At the end of the operating season, the

Contractor shall add dispersant several days prior to shutdown, drain the system, flush the system, and lay the system up with treated water.

5.5.3.4.2 Air Conditioning to Heat. The Contractor shall begin shutdown of all applicable cooling systems and start-up of all applicable heating systems, historically on approximately 15 October to 15 November, and complete the changeover within 15 calendar days. Climatic variations may require the KO to direct changeover of seasonal equipment at dates earlier or later than those specified. During changeover, the Contractor shall take corrective action via SO or IJO if any operational deficiencies are identified.

5.5.3.4.3 Additional Tasks. The Contractor shall: switch over valves from air conditioning to heating and vice versa as specified; check EMCS controls; turn on computer controls; run systems through a complete cycle; activate thermostats;

verify operation of all safety and operating controls; check systems for water and refrigerant leaks; check pressure gauges, dampers, and linkages; and check cooling/heating output and overall system operation.

5.5.3.5 Cooling Plants and Systems

The Contractor shall operate and maintain cooling systems and related auxiliary equipment including, but not limited to: chillers, cooling towers, air conditioning units, refrigeration systems, pumps, compressors, and motors. All equipment shall be maintained to meet operational requirements except when off-line for maintenance or secured for energy conservation. All scheduled maintenance shall include a visual inspection of all components to ensure proper operation and to check for leaks or other deficiencies. The Contractor shall take corrective action as necessary. The Contractor shall also ensure control systems operate and function in such a manner so as to maintain the specified output of the mechanical system it controls. The Contractor shall maintain logbooks and a building checklist following completion of all maintenance activities. The Contractor shall comply with Title VI (Clean Air Act) Stratospheric Ozone Protection Requirements on a monthly basis, (CDRL 505R-002). See para.

5.2.2.2.4

5.5.3.5.1 Semi-Annual Maintenance. The Contractor shall perform the following maintenance on a semi-annual basis on all cooling systems. Those tasks performed during the cooling season while the systems are in operation shall be external in nature. Those tasks performed during the heating season while the systems are shutdown shall be internal in nature.

5.5.3.5.1.1 Direct Expansion Cooling/Dehumidifiers. Maintenance tasks shall include, but are not limited to:

Cleaning coils.

Changing filters.

Checking for refrigerant leaks.

Checking expansion valves.

Cleaning drain and condensate pans.

Calibrating the system.

5.5.3.5.1.2 Air Compressors. Maintenance tasks shall include, but are not limited to:

Replacing air intake filters.

Checking the belt tension and wear.

Checking the air pressure control and pressure relief for proper setting.

Checking compressor oil.

Cleaning air-cooled condenser on air dryer.

Checking the air dryer cabinet and the oil filter with the automatic drain.

Checking the automatic condensate drain.

Repairing and replacing pneumatic air lines.

Change oil on condenser pump electric motors.

5.5.3.5.1.3 Refrigeration Equipment. Maintenance tasks shall include, but are not limited to: Checking vessel connections, relief valves, coils, and lines for leaks.

Cleaning coils, drain pans, drain lines, fan blades, and cabinets.

Checking refrigerant oil, dryers, sight glasses, and charge; and calibrating the system.

5.5.3.5.2 Air Filters. Selected air filters shall be changed monthly. In conjunction with this task, the Contractor shall clean the equipment, identify other needed repairs, properly dispose of used filters, and maintain a record of where and when filters were changed. All new filters will be annotated with the technicians initials and date of filters changed. (All initials and dates will be legible). The buildings for which this requirement applies are listed within Technical Exhibit 5.5-006. The contractor will be responsible for keeping an updated building list monthly.

5.5.3.6 Heating Plants and Systems

The Contractor shall operate and maintain heating systems and related auxiliary equipment, including electric boilers, oil boilers, gas boilers, steam boilers, hot water boilers, boiler feed pumps, condensate return pumps, air compressors, and related equipment. All equipment shall be maintained to meet operational requirements except when off-line for maintenance or secured for energy conservation. All scheduled maintenance shall include a visual inspection of all components to ensure proper operation and to check for leaks or other deficiencies. The Contractor shall take corrective action as necessary. The Contractor shall also ensure control systems operate and function in such a manner so as to maintain the specified output of the mechanical system it controls. The Contractor shall maintain logbooks and a building checklist following completion of all maintenance activities. Technical Exhibit 5.5-005 contains a building list for heating plants and systems. The contractor will be responsible for keeping an updated building list monthly. The Contractor shall perform the following tasks on steam boiler systems and hot water boiler systems annually: See para. 5.2.2.2.4.

Pull, clean, and service burner and burner assembly.

Clean and inspect boiler water level control assembly (including fleat).

Check proper operation of flame management system

Verify operation of all safeties, high limits, low limits, and pressure relief.

Service and calibrate boiler controls for proper operation.

5.5.4 UNSCHEDULED TASKS

The Contractor shall perform the tasks described below when initiated through either a SO or an approved IJO.

5.5.4.1 Unscheduled Repair

The Contractor shall perform unscheduled repair on systems including, but not limited to: cooling systems, heating systems, air conditioning units, air compressors, vacuum systems, and mechanical ventilation equipment, air distribution systems, EMCS and automatic temperature control systems. The Contractor shall inspect, test, clean, adjust, calibrate, and repair or replace all parts, or components, necessary to restore the equipment, or system to a condition to perform the function for which it was designed.

5.5.4.1.1 Cooling Equipment. The Contractor shall adjust, modify, replace, and repair all cooling systems and cooling towers, to include, but not limited to: motors, fans, drains, valves, and control devices. The Contractor shall locate and remove piping obstructions from fan coil units, air handler units with coils, and other cooling equipment. Trade practices, methods, and equipment shall be used.

5.5.4.1.2 Heating Equipment. The Contractor shall maintain and repair all steam fitting, low and medium pressure steam, and high temperature, high pressure hot water heating lines for heating and processing boilers, converters, pumps and associated controls, piping, and equipment. The Contractor shall maintain and repair all steam, hot water, gas fired, oil fired, electric generated heating equipment, and components.

5.5.4.1.3 HVAC Testing and Balance. The Contractor shall occasionally test and balance HVAC systems. The Contractor shall make all necessary adjustments to HVAC equipment based on the results of the tests. Test and balance would be performed to ensure proper airflow, water flow, and static pressure drop.

5.5.4.1.4 Water Softeners. The Contractor shall periodically check all boilers that have a zeolit water softener for hardness using the Total Hardness Test. When excess hardness is present in the softened water, the Contractor shall regenerate the softener.

Hardness shall not exceed 2 PPM at any time. If necessary, the Contractor shall add sodium chloride to the brine tank as needed.

5.5.4.1.5 Air Conditioning Units and Air Cooled Condensers. Repair, replacement, and maintenance tasks shall include, but are not limited to: repairing air cooled condensers; coils; fan blades; fan bearings; fan belts; compressor oil; pressure controls; electrical connections; relays; starters; and heaters.

5.5.4.1.6 Air Compressors. Repair, replacement, and maintenance tasks shall include, but are not limited to: changing the compressor oil; motors; and all electrical contacts.

5.5.4.1.7 Cold Water Dispensers. Repair, replacement, and maintenance tasks shall include, but are not limited to: checking water lines for leaks; checking fan motor oil;

and performing fan motor repairs.

5.5.4.1.8 Steam Boiler and Hot Water Boiler Systems. The Contractor shall perform repair, replacement, and maintenance tasks on steam boiler systems and hot water boiler systems. These shall include, but are not limited to: repair electrical equipment in accordance with TM 5-650; maintain soot blowers for proper operation; adjust pressure, temperature, and volume of boiler; repair or replace condensate pumps; repair or replace tanks; repair or replace float switches, couplings, valves, gauges, drains, seals, fittings, and strainers; and repair or replace electrical connections, starters, and contacts.

5.5.4.1.9 Gas Boiler. The Contractor shall perform the following tasks on an as needed basis. These tasks include, but are not limited to: repairing, cleaning, adjusting, or replacing gas valves; gas strainers; regulators; gauges; gas lines; burner and burner assembly; refractory and tubes; pilot assemblies; controls; linkages; water feeders;

float assemblies; barometric draft dampers; valves; surge tank; and insulation.

5.5.4.1.10 Oil Fired Hot Water Boiler. The Contractor shall perform the following tasks on an as needed basis. These tasks include, but are not limited to: repairing, cleaning, adjusting, or replacing fuel filters and strainers; gauges and sight glasses;

flame rod; milivolt output; controls and linkages; barometric back draft damper and air to fuel ratios for all combustion ranges; high and low limits; pressure reliefs;

internal switches; float assembly; dielectric unions; and electrical connections and contacts.

5.5.4.1.11 Water Heater. The Contractor shall perform the following tasks on an as needed basis. These tasks include, but are not limited to: repairing, cleaning, adjusting, or replace burner assemblies; thermocouples; gas lines; air and gas pressure; flue baffles; temperature and pressure relief valves; automatic flue dampers; and elements.

5.5.4.1.12 Steam and Condensate Trap. The Contractor shall perform the following cleaning, adjusting, or replacing steam and condensate traps for normal operation;

temperature sticks; internal components; bellows; seats; floats; plugs; and other mechanisms.

5.5.4.1.13 Oil Fired Furnace. The Contractor shall perform the following tasks on an as adjusting, or replacing fuel tanks; fuel filters; fuel strainers; fuel pumps; gauges and sight glasses; fuel lines for leaks; burner fans; burner assemblies and nozzles;

milivolt output; ignition transformers; fireboxes and exchangers; safeties and electrical connections; barometric back draft dampers; filters; and ductwork.

5.5.4.1.14 Gas Fired Furnace. The Contractor shall perform the following tasks on an as needed basis. These tasks include, but are not limited to: repairing, cleaning, adjusting, or replacing gas valves; gas strainers; diaphragms in regulators; gauges;

gas lines; gas pressure safeties; burner assemblies; ignition transformers; igniters;

electrical connections; and filters.

5.5.4.1.15 Dehumidifiers and Humidifiers. The Contractor shall perform the following cleaning, adjusting, or replacing fan motors; evaporators; condensers; humidifier strainers; drains and drain pans; float assemblies; spray nozzles; and electrical connections, relays, and contacts.

5.5.4.1.16 Air Handling Units, Fan Coil Units, Unit Heaters, and Unit Ventilators. The

Contractor shall perform the following tasks on an as needed basis. These tasks include, but are not limited to: repairing, cleaning, adjusting, or replacing coils;

electrical connections; motor mounts and supports; and check belts.

5.5.4.1.17 Exhaust Fans and Ventilators. The Contractor shall perform the following tasks on an as needed basis. These tasks include, but are not limited to: repair, clean, adjust or replace motors; electrical connections; motor mounts and supports; belts;

fan blades; bird/insect screens and covers; frames; leaks; starters; contacts; louvers;

and grills.

5.5.4.1.18 Heat Exchangers. The Contractor shall perform the following tasks on an as adjusting, or replacing leaks; strainers; safety devices; temperature controls; steam traps; and hand valves.

5.5.4.1.19 Circulating Water Pumps. The Contractor shall perform the following tasks on an as needed basis. These tasks include, but are not limited to: repairing, cleaning, adjusting, or replacing frames; supports; pads; flanges; bolts; gaskets;

gauges; unions; valves; and air vents.

5.5.4.1.20 Chilled Water Distribution System. The Contractor shall maintain and repair approximately 96,120 linear feet of chilled water distribution lines.

Maintenance tasks shall include, but not be limited to: lubricating valves; checking mechanical couplings; checking the operation of sump pumps, piping, and electric power to sump pumps; and cleaning pits of debris. In addition, on a monthly basis, the Contractor shall check the condition of the ground for signs of leaks and the condition of the insulation. Plant piping and equipment shall be painted as needed.

5.5.4.1.21 Closed-loop A/C Systems. As required, the Contractor shall add anti-freeze to replenish safe levels in the systems, prevent freeze-up, and bring the freezing point to -12°F. There are approximately 65 closed-loop water systems on Fort Benning.

5.5.4.1.22 Paint Booth. The Contractor shall repair and maintain all safety controls, operating controls, and heat and ventilation equipment on all paint booths.

5.5.4.2 New Equipment Installation and Inspection

The Contractor shall install new HVAC equipment and systems (to include EMCS/FM Load Management Systems) upon receipt of a valid work document. The Contractor shall inspect and evaluate new equipment for compliance with the manufacturer's specifications and shall notify the KO of all deficiencies noted during this inspection.

5.5.4.3 Equipment Modifications

The Contractor shall modify HVAC equipment and systems upon receipt of a valid work document and shall evaluate the modification of the equipment for compliance with the manufacturer’s specifications. As detailed in Section C-1, the Contractor shall not perform any modification that voids an existing warranty.

5.5.4.4 Equipment and System Removal

The Contractor shall remove HVAC equipment and systems upon receipt of a valid work document.

5.5.4.5 Reduced Power Response

When required for reduced Electrical Distribution System (EDS) loading, the Contractor shall shut down non-critical air conditioning systems during reduced EDS loading within one hour after notification from the KO.

5.5.4.6 Unscheduled Air Conditioning to Heat Changeover

The Contractor shall change HVAC systems from air conditioning to heat or heat to air conditioning due to fluctuations in temperature or as directed by the KO.

5.5.4.7 Freezing Weather Maintenance

The Contractor shall perform maintenance, repairs, and checks during freezing weather conditions to prevent damage to HVAC equipment. All work shall be done in accordance with the freeze-up plan submitted as part of the Contingency Service Plans.

5.5.4.7.1 Boiler and Piping. The Contractor shall drain and blow out all idle equipment; check service water lines for possible freezing; check that insulation is not damaged; check tracing around control lines and transmitter boxes; and check steam traps for proper operation.

5.5.4.7.2 Compressor Air Systems. The Contractor shall drain air tanks; inspect air dryers, after coolers, and intercoolers; and drain, blow out, and flush with glycol all idle compressor jackets.

5.5.4.7.3 Air Conditioning and Refrigeration Systems. The Contractor shall drain, blow out, and flush all seasonal equipment, condenser lines, tubing, and piping. The Contractor shall inspect outside dampers and cut back cooling tower fan speeds.

5.5.4.7.4 Pressure Vessel Vents. The Contractor shall drain loops and bends and correct low spots in long runs. The Contractor shall protect vessel vents from ice or snow accumulation.

5.5.4.7.5 Relief Valves. The Contractor shall protect relief valves from snow or ice accumulation, clear relief valve body drains, protect valve discs from freezing shut, and relocate relief valves to heated areas wherever possible.

5.5.4.7.6 Mechanical Equipment. The Contractor shall drain all idle pumps and compressors. The Contractor shall ensure that jackets are vented, provide proper lubrication for cold weather protection, provide heated enclosures around operating equipment wherever possible, and install no-flow switches and alarms in cooling water lines.

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