01.00_A_PROJO_StateInitials_BT_City_DraftorFinal_PPDC.docconstruction.usm.edu/stenningmaterials/AFRH-RFP-Specs... · Web viewThe associated components include, but are not limited

Armed Forces Retirement Home Design Build Services Request for ProposalGulfport, Mississippi 21 May 2007

E – HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

OVERALL PROJECT CRITERIA

GeneralThe Design Build Contractor (D-BC) shall comply with all parts of this Section. Specific deviations shall be submitted in writing and approved by the Government prior to commencement of work.

DrawingsThe following information shall be shown on Mechanical HVAC drawings:

Minimum Drawing Scales shall be as follows:

o Ductwork and Piping Floor Plans: 1/8” = 1’-0”.o Mechanical Equipment Room Floor Plans and Sections: 1/4” = 1’-0”.o Mechanical chases at each floor: 1/4” = 1’-0”.

Sections shall be shown as required to clarify installation, especially through areas of possible conflict. Sections shall show all electrical and plumbing equipment.

Final design drawings in the Construction Document Phase of the project shall show all ductwork (regardless of sizes and/or complexity of layouts) and piping above 6” size as double line with all fittings and accessories clearly shown and identified.

Indicate the location of all outdoor exposed, or underground chilled water piping.

All equipment shall be designed for, and installed on, concrete equipment pads.

Engineering Economic AnalysisAn Engineering Economic Analysis shall be performed in accordance with the procedure outlined in NIST Handbook 135 (Latest Edition), “Life-Cycle Costing Manual for the Federal Energy Management Program” to select the most cost effective HVAC system for the Project. The analysis shall include the factors outlined below.

Life Cycle: 20-years.

Discount Factor: 7%.

Exclude all taxes and insurance for computing annual owning costs.

Energy Conservation Certificate RequirementsThe D-BC shall perform an Energy Simulation verifying the facility exceeds by 30% the minimum energy efficiency performance levels set forth in ASHRAE Standard 90.1-2004 in accordance with the Energy Policy Act of 2005.

General Services Administration E - 1 Public Buildings ServiceSoutheast Sunbelt Region Chapter 7 Real Estate Design and Construction

UNCLASSIFIED


BASIC DESIGN PARAMETERS

Outdoor Air Design Conditions

DescriptionSummer Winter

°F (DB) °F (WB) °F (DB) °F (WB)Outside Design Conditions 93.5 80.2 30.3 -Notes:

1. ASHRAE Climatic Design Information for Keesler AFB, Gulfport, MS at 0.4% Summer Design and 99.6% Winter Design.

2. Local Professional Engineer may recommend more severe Outdoor Design Conditions for review and approval by the Government.

3. DB – Dry Bulb; WB – Wet Bulb.

Indoor Design Conditions

DescriptionSummer Winter

°F (DB) RH (%) °F (DB) RH (%)Auditoriums 76 60 72 -

Bathrooms & Toilet Rooms 78 - 72 -

Computer Rooms 72 +/- 2 45 +/- 5 72 +/- 2 45 +/- 5

Dining Rooms 78.0 50 72 -

Electrical Equipment Rooms 82 - 50 -

Emergency Generator 110 - 40 -

Elevator Machine Room 90 - 50 -

Kitchens 82 60 70 -

Living Units, Independent, Assisted, Memory Support, and Long Term Care

75 50 72 -

Locker Rooms 78 50 72 -

Lounges 78 50 72 -

Mechanical Equipment Rooms 82 - 50 -

Conference Rooms, Offices 75 50 72 -

Resident Rooms, Nurse Stations, Clinics 76 50 78 -

Shops, Storage Rooms 78 50 72 -Notes:

1. DB – Dry Bulb; WB – Wet Bulb; RH – Relative Humidity.


UNCLASSIFIED


Measure temperature from center of seating height, 3 feet above finished floor.

Indoor Design Conditions shall not be considered design limits.

All room temperature sensors and thermostats shall be adjustable between 60°F and 85°F with an adjustable dead band of 6°F.

With the exception of the Computer Room, the summer inside design relative humidity shown above need not be maintained by an active humidity control system. All humidity levels shall be considered +/- 5%.

Load Densities for CoolingPeopleOccupancy shall be computed in accordance with Code. Cooling loads shall be based on ASHRAE recommendations for activity anticipated for each Occupancy.

Lighting and PowerThe minimum load densities provided below shall be utilized for Design Development cooling load calculations. Densities shall be updated for Construction Documents in accordance with Code and detailed design requirements.

Description Lighting Power TotalAuditoriums 2.5 W/sq. ft. 2.5 W/sq. ft. 5 W/sq. ft.

Conference Rooms 2.0 W/sq. ft. 2.5 W/sq. ft. 4.5 W/sq. ft.

Dining Rooms 1.5 W/sq. ft. 2.0 W/sq. ft. 3.5 W/sq. ft.

Lounges and Offices 1.5 W/sq. ft. 2.5 W/sq. ft. 4.0 W/sq. ft.

Outside Air Quantity (Ventilation)Minimum ventilation rates shall be maintained in accordance with the ASHRAE Standard 62.1–2004.

Areas Served by Fan Coil Unit SystemsA central dedicated outdoor air system (DOAS) shall be utilized to supply conditioned neutral outdoor air (75°F DB/50% RH Summer, 72°F DB Winter) to occupied spaces. Air may be injected directly into the space or connected directly to fan coil unit equipment.

Areas Served by Central Air Handling SystemsFor central air handling systems which mix outdoor air with return air for conditioning and distribution, the DBC shall verify that minimum outdoor air ventilation rates are maintained in all spaces. Verification shall be documented in accordance with ASHRAE Standard 62.1-2004 for Common Ventilation Systems.


UNCLASSIFIED


Supply Air Quantity CriteriaThe supply air volume shall be established to meet the cooling load requirement of the occupied space. Further, supply air volumes shall be increased, if required, to meet exhaust requirements.

Exhaust Air Quantity CriteriaThe areas listed below shall be fully exhausted outdoors at the minimum rates indicated.

Description Minimum Design Exhaust Air Changes/Hr

Bathing Facilities 10

Bathrooms 10

Janitors Closets 10

Kitchen SA + 15%

Locker Rooms SA + 15%

Soiled Linen Rooms 6

Soiled Utility Rooms 6

Storage Room (Soiled or Dirty) SA + 15%

Toilets 10

Trash Collection Area 10

Ducted supply air is not required to ventilate janitors’ closets and private toilets with one fixture. Instead, transfer air from occupied spaces, directly connected to the janitors’ closets and private toilets, may be used as make-up air for exhaust. Transferring air from egress corridors is not allowed.

For kitchens, establish the supply air quantity to meet the cooling load and/or equipment exhaust requirements.

Noise and Vibration CriteriaThe DBC shall follow the criteria and guidance of the Uniform Facility Criteria (UFC) “NOISE AND VIBRATION CONTROL,” UFC 3-450-01.

Building Thermal EnvelopeThe DBC shall provide a building thermal envelope consistent with the building Code and the requirements of ASHRAE Standard 90.1-2004, whichever is more stringent. Thermal envelope requirements shall be updated as part of the Energy Simulation to optimize facility efficiency, and exceed by 30% the minimum efficiency requirements set forth in the Energy Policy Act of 2005.


UNCLASSIFIED


HVAC EQUIPMENT SIZING CRITERIAAir Handling Equipment Heating, ventilating, and air conditioning load calculations shall be performed in

accordance with the methods outlined in the ASHRAE Handbook of Fundamentals.

Calculations shall be performed using one of the following computer-based programs: Carrier Hourly Analysis Program or Trane Trace. Use of other computer programs shall be approved in writing by the Government prior to commencement of work. Manual calculations are not allowed.

The calculated supply air volume for each air handling system shall be the sum of all individual peak room air quantities associated with the system without any diversity.

Safety Margin: A factor of 10% shall be added to the internal sensible cooling load for each air handling system. The calculated air quantities for the occupied spaces shall include the additional safety margin.

Duct Air Leakage: The leakage of air through the supply air distribution ductwork shall be computed on the basis of the method described in the SMACNA Air Duct Leakage Test Manual. The maximum leakage amount shall not exceed 4% of the adjusted supply air volume.

Supply Fan Air Volume: The capacity of the supply air fan shall be include the calculated supply air volume, safety margin, and duct air leakage.

Equipment Selection: The capacity of the supply air fan and all associated air handling unit components shall be based and scheduled on the Supply Fan Air Volume. The associated components include, but are not limited to, cooling coils, heating coils, energy recovery coils, filters, louvers, and dampers. A psychrometric chart shall be prepared for each air handling unit and the heat gain due to the fan motor shall be clearly shown and accounted for in calculating the capacity of each unit.

The main supply air ductwork shall be sized to deliver the Supply Fan Air Volume.

The fan and motor selection shall be based on the Supply Fan Air Volume and static pressure adjusted, as necessary, for the altitude, temperature, fan inlet and discharge conditions, and AMCA 201 System Effect Factors. The fan selection shall be made within a stable range of operation at an optimum static efficiency. The fan motor BHP, required at the operating point on the fan curves, shall be increased by 10% for drive losses and field conditions to determine the fan motor horsepower. The fan motor shall be selected within the rated nameplate capacity and without relying upon NEMA Standard Service Factor.

Refrigerant Equipment The capacity of the refrigeration system including accessories (condenser and chilled

water pumps, cooling towers, piping, etc.) shall be based on the sum of the total cooling requirements of all connected air handling units and terminal fan coil units. No additional safety factor shall be applied.


UNCLASSIFIED


DUCT SIZING CRITERIALow Pressure Ductwork All supply air ductwork downstream of air terminal units, return air ductwork, and

exhaust air ductwork shall be low velocity/low pressure type. For supply air ductwork the maximum velocity and static pressure drop shall be limited to 1,500 feet per minute and 0.1 inch of water gage (in. w.g.) per 100 equivalent feet of duct length, respectively.

For return and exhaust air ductwork the maximum velocity and static pressure drop shall be limited to 1,500 feet per minute and 0.08 in. w.g. per 100 equivalent feet of duct length, respectively.

Medium Pressure Ductwork Only the supply air ductwork between the fan discharge and inlet to the air terminal

units are allowed to be medium pressure type. Medium velocity ductwork shall be used only if the available space conditions can not accommodate low velocity duct sizes.

The maximum velocity and the static pressure drop shall be limited to 2,500 feet per minute and 0.25 in. w.g. per 100 equivalent feet of duct length, respectively.

PIPE SIZING CRITERIAOpen Piping Systems Pipe sizing shall be based on “Cameron Hydraulic Data”; with C=100 for open piping

systems and C=150 for closed systems. The maximum friction loss shall be limited to 4.0 feet of water per 100 equivalent feet of piping.

Flow velocity shall be limited to 10.0 feet per second.

Closed Piping Systems For closed piping systems the maximum pressure drop shall be limited to 4.0 feet of

water per 100 equivalent feet of piping. Flow velocity in Occupied Areas shall be limited to 4.0 feet per second. Mains and large branches shall be limited to 8.0 feet per second.

The minimum pipe size shall be ¾ inches. The size shall be reduced, as required, only at the equipment connections.


UNCLASSIFIED


RECOMMENDED HEATING, VENTILATION and AIR CONDITIONING SYSTEMSGeneralThe mechanical HVAC system types described are recommended for this Project due to factors including, but not limited to the program size, anticipated building configuration, site limitations, and requirements to maintain a functioning facility after a major hurricane event. Life-cycle cost system selection studies are limited to Primary Cooling and Primary Heating Systems for this Project. The D-BC shall provide a System Selection Study for each of these primary systems using the basic configuration outlined below. Other HVAC and Hot Water Systems may be submitted for evaluation during the Technical Evaluation of the D-BC submission.

Primary Cooling SystemsChilled water shall be generated for use as the primary means of rejecting HVAC heat on the Project. The design basis temperature rise shall be limited to between 10°F and 12°F. This is due in large part to the extensive use of terminal fan coil units on the project which do not provide stable operation at temperature differentials above this level. Chilled water supply temperature shall be limited between 40°F and 45°F.

Three basic plant configurations shall form the basis of the life-cycle cost analysis system selection study. Capacity in each plant refers to Total Peak Cooling Load for the facility.

Chilled Water Plant 1 Chillers: Three 40% Capacity Centrifugal Chillers arranged in parallel.

Primary Pumping System. Three equally sized constant volume centrifugal pumps. Piped and controlled so that any primary pump can serve any chiller.

Secondary Pumping System. Hydraulically de-coupled from Primary Pumping System. Three equally sized centrifugal pumps. Pump motors equipped with Variable Frequency Drives (VFD) to achieve variable volume flow.

Cooling Towers: Three Cell, Induced Cooling Tower. Each cell matching the capacity of one centrifugal chiller. Fan motor of each cell equipped with a VFD for capacity control.

Condenser Water Pumps: Three constant volume centrifugal pumps. Piped and configured for any condenser water pump to serve any cooling tower or chiller.

Chilled Water Plant 2 Chillers: Two (2) 67% Capacity Centrifugal Chillers, and one 25% Capacity Screw

Pony Chiller. All chillers arranged in parallel.

Primary Pumping System. Two equally sized constant volume centrifugal pumps serving centrifugal chillers and one constant volume centrifugal pump serving the screw chiller. Piped and controlled so that either of the two larger primary pumps can serve either centrifugal chiller. Smaller pump shall be dedicated to the screw chiller.


UNCLASSIFIED


Secondary Pumping System. Hydraulically de-coupled from Primary Pumping System. Two (2) equally sized centrifugal pumps with each pump matching flow requirements of one centrifugal chiller, and one centrifugal pump matching the flow requirements of the screw chiller. Each pump motor equipped with a VFD to achieve variable volume chilled water flow.

Cooling Towers: Two (2) Cell, Induced Cooling Tower. Each cell matching half of total chiller plant capacity. Each fan motor equipped with VFD for capacity control.

Condenser Water Pumps: Two (2) equally sized constant volume constant volume centrifugal pumps, each matching the capacity of one centrifugal chiller. One (1) constant volume centrifugal pump matching the capacity of the screw chiller. Piped and arranged such that any of the larger condenser water pumps can server either centrifugal chiller. The smaller centrifugal pump piped in parallel with the larger pumps but dedicated for use with the screw chiller.

Chilled Water Plant 3 Chillers: Two (2) 67% Capacity Centrifugal Chillers arranged in parallel.

Primary Pumping System. Two (2) equally sized constant volume centrifugal pumps. Piped and controlled so that either any pump can serve either centrifugal chiller.

Secondary Pumping System. Hydraulically de-coupled from Primary Pumping System. Two (2) equally sized centrifugal pumps with each pump matching flow requirements of a chiller. Each pump motor equipped with a VFD to achieve variable volume chilled water flow.

Cooling Towers: Two (2) Cell, Induced Cooling Tower. Each cell matching capacity of one centrifugal chiller. Each fan motor equipped with VFD for capacity control.

Condenser Water Pumps: Two (2) equally sized constant volume centrifugal pumps, each matching the capacity of a centrifugal chiller. Piped and arranged such that any of the larger condenser water pumps can server either centrifugal chiller.

Common Chilled Water Plant Requirements Freeze Protection: All portions of the Condenser Water System exposed to ambient

temperatures below 32°F shall be properly protected from damage due to freezing.

Measures shall include, but not be limited to, piping heat tracing and cooling tower basin heaters. Chilled water piping and equipment shall not be located such that they are exposed to temperatures below 32°F.

Condenser Water Filtration: Provide a method for filtering the condenser water system either through a packaged sand filter system or a package centrifugal separator system.

The DBC shall provide a Chemical Free Water Treatment System for treatment of the Condenser Water System. System shall employ an electrical pulse, time varying, induced field to alter mineral precipitation in the water, encapsulating bacteria which


UNCLASSIFIED


can be removed through filtering and blow down. System shall be included in the Life Cycle Cost Analysis for reduced water consumption and operations and maintenance cost. System shall serve as the basis for a LEED NC 2.2 Innovation in Design Credit for water savings from reduced blow down cycles.

The D-BC shall locate Condenser Water System Cooling Towers in a protected area which can be fortified and protected during a hurricane event from wind and wind blown debris.

Primary Heating SystemsHot water shall be generated for use as the primary source of HVAC heat on the Project. Hot water supply temperature shall be limited to 200°F. The design basis temperature drop shall be limited to 30°F.

Three design basis plant configurations shall form the basis of the life-cycle cost analysis system selection study. Capacity in each plant refers to Total Peak Heating Load for the facility.

Hot Water Plant 1 Boilers: Two (2) 60% Capacity Fire-Tube Boilers. Dual fuel capable.

Fuel: Natural Gas and No. 2 Fuel Oil.

Primary Pumping System. Two (2) equally sized constant volume centrifugal pumps. Piped and controlled so that either primary pump can serve either boiler.

Secondary Pumping System. Hydraulically de-coupled from Primary Pumping System. Two (2) equally sized centrifugal pumps. Pump motors equipped with Variable Frequency Drives (VFD) to achieve variable volume flow.

Hot Water Plant 2 Boilers: Condensing Type w / nominal capacity of 2,000 MBH. Quantity shall be N+1

based on the actual Heating Load and the lowest efficiency operating point of Condensing Boilers. Dual fuel capable.

Fuel: Natural Gas and Propane.

Variable Primary Pumping System. Provide one constant volume centrifugal pump per boiler. Vary hot water supply flow to the facility via a bypass pressure control valve.

Hot Water Plant 3 Boilers: Condensing Type w/ a Nominal Capacity of 3,000 MBH. Quantity shall be

N+1 based on the actual Heating Load and the lowest efficiency operating point of Condensing Boilers. Dual fuel capable.

Fuel: Natural Gas and Propane.

Variable Primary Pumping System. Provide one constant volume centrifugal pump per boiler. Vary hot water supply flow to the facility via a bypass pressure control valve.


UNCLASSIFIED


All-Air SystemsIt is recommended that common and public areas, including but not limited to Activity Rooms, Dining Rooms, Conference Rooms, and Offices shall be served by all-air HVAC systems. The features delineated below shall be incorporated into the design unless specific deviations are submitted in writing and approved by the Government prior to commencement of work.

Design Basis An all-air system shall be comprised of a single duct, horizontal, draw-thru, chilled

water, variable air volume (VAV) air handling unit which shall include but not be limited to a pre-filter, final filter, hot water heating coil, chilled water cooling coil, and supply fan. Variable air volume shall be achieved through the use of variable frequency drive equipped fan motors.

Roof mounted air handling units are not allowed due to hurricane weather protection requirements.

Each air handling unit shall be equipped with a return air fan and an air-side economizer providing "free cooling" during favorable outdoor temperature and humidity conditions. Economizer control shall be via electronic or differential enthalpy control, or dew point and dry-bulb temperature control. Fixed dry-bulb temperature or fixed enthalpy control is not acceptable.

Air filters shall be comprised of a pre-filter and final filter section. The pre-filter section shall have a Minimum Efficiency Rating Value (MERV) of 5 and the final-filter a MERV rating 13, in accordance with ASHRAE Standards 52.1 and 52.2. The pre-filter and final-filter filters can be located back-to-back as one section, in the same frame, on the upstream side of the supply air fan.

Air distribution ductwork complete with ducts, cooling only variable air volume terminal units, and supply air outlets shall be used to provide conditioned air to the spaces. Ducted return air connections shall be provided for each air handling unit system serving clinics and associated areas, such as, nursing stations, examination rooms, corridors, etc. The return air need not be ducted for air handling units serving non-clinical areas, such as, offices, conference rooms, lounges, etc. An insulated "Z" duct shall be used for return air from rooms where the partitions extend up to the under side of the structural ceiling. Exhaust air shall be ducted from each space to be exhausted. Transfer of supply, return, and exhaust air, from one occupied area to another, is not permitted without ducted connections.

Perimeter heating shall be provided where required to maintain Indoor Design Conditions during the heating mode of operation.

Common Dining Area / Multi-Purpose Activity Room During a hurricane event, the Dining Room and the Multi-Purpose Activity Room will

be used for emergency assembly. The space will likely serve as an area of refuge


UNCLASSIFIED


and protection during a hurricane event, with the primary cooling system and associated cooling towers expected to be shut-down and protected for the event duration. Heating and cooling must be maintained for the duration of the event in these areas.

A geothermal heating and cooling system may be considered as an option due in large part to its ability to operate through and survive a major hurricane event. If provided, the geothermal system shall utilize a closed loop, ground-coupled type geothermal heat exchanger serving extended range water source heat pumps. The water-to-air heat pump equipment shall include all the features delineated in the Design Basis of the All Air System above.

Terminal Cooling/Heating Systems:A 4-pipe terminal fan coil unit system is recommended for all residential living units including Independent Living, Assisted Living, Memory Support and Long-Term Care Units. Chilled water will be utilized for cooling, and hot water for heating as provided from their respective central plants. Each fan coil unit must be separately valved from the risers to enable ease of maintenance. Fan coil units may also be utilized in perimeter spaces that cannot readily be served by an all-air system. Principal features of the system are delineated below.

Dedicated Outdoor Air System Provide a dedicated outdoor air system which delivers outside air for ventilation

directly to each space served by a fan coil unit. Air shall either be directly ducted to each fan coil unit or directly supplied to each space and shall be delivered at neutral conditions of 75°F dry bulb/50% RH in the summer and 72°F dry bulb in the winter.

The air handling units for the outdoor air system, at a minimum, shall utilize a pre-filter, final filter, hot water heating coil, chilled water cooling coil, heat pipe re-heat coil and supply fan and motor equipped with a variable frequency drive. Air filtration shall be the same as that specified for the all-air system air handling units. The system shall include at a minimum sensible heat recovery from toilet and general exhaust air systems. Total heat recovery (sensible and latent) shall only be allowed for general exhaust systems.

Fan Coil Unit Configuration It is recommended that floor-mounted four (4) pipe fan coil units be located under the

windows. The use of horizontal, ceiling suspended, fan coil units or through-wall ventilation will not be allowed.

Temperature Control Criteria:Temperature controls shall be direct digital control (DDC) type with electric operators for control valves, air terminal units, and control dampers. The controls shall be stand-alone type. A dedicated Engineering Control Center (ECC) shall be provided to facilitate remote start/stop.


UNCLASSIFIED


Room Temperature Control

Room temperature sensors shall have an adjustable dead band (6°F) to reduce the use of heating and cooling energy.

Except where the use of reheat is permitted to maintain room temperature, the control system shall be designed to eliminate simultaneous use of heating and cooling energy.

Individual Room Temperature Control shall be provided in the following spaces:

o All bedrooms in domiciliary and nursing units.o All conference rooms.o Offices of directors, assistant directors, and chiefs.o All corridors.

Combined Room Temperature Control. The following spaces can be grouped as one temperature control zone:

o Exterior (other than corner) office spaces located on the same exposure. As many as four rooms can be grouped together as one temperature control zone.

o Interior offices and non-resident areas. Based on the architectural layout, as many as six interior rooms may be grouped together as one temperature control zone.

Limitations. The following areas shall not be grouped together to form one temperature control zone:

o Interior spaces and perimeter spaces.o Areas on different exposures of the exterior wall.o Corridors and occupied (perimeter or interior) areas.

Fan Volumetric Controls Fan associated with Variable Air Volume (VAV) systems shall be equipped with

Variable Frequency Drives (VFD). The package of controls shall at a minimum include the following:

o VFD’s for both supply and return fans.o Air Flow Measuring Devices physically located in accordance with manufacturer’s

recommendations to achieve accurate flow measurement (+/- 5%) throughout the entire operating range of each system.

o Static Pressure Sensors located in accessible and maintainable locations. Sensors placed in duct risers located in fire-rated enclosures shall be provided with a fire-rated maintenance access door. The fire rating of the access door shall be equal to or greater than that of the fire-rated enclosure.


UNCLASSIFIED


Smoke and Fire ControlSmoke Detectors Duct-mounted smoke detectors shall be provided in accordance with Code. Detection of particles of combustion by the duct detector shall result in the following:

Stop the supply and return fans associated with the air handling unit.

Provide an alarm signal input to the fire alarm system.

Provide an audible alarm and print an alarm message at the Engineering Control Center (ECC).

Smoke DampersProvide smoke dampers in accordance with Code at all HVAC system penetrations of smoke rated partitions.

Fire DampersProvide fire dampers in accordance with Code at all HVAC system penetrations of fire-rated partitions.

Miscellaneous Requirements Provide Stair Pressurization Systems in accordance with Code.

Provide Pressurization Systems for Areas of Rescue Assistance.

Provide Elevator Smoke Venting in accordance with the Elevator Safety Code.

Miscellaneous HVAC Systems:Toilet Exhaust Systems Provide Toilet Exhaust Systems in accordance with Code.

General Exhaust Systems Provide General Exhaust Systems in accordance with Code to relieve excess

Outdoor Air and maintain proper building pressure.

Telephone Equipment Rooms Provide a dedicated, stand-alone, precision type air conditioning system to serve

telephone equipment rooms. Units shall be capable of cooling, heating, humidifying, and de-humidifying the space. Size the cooling capacity of the unit at the rate of 100 telephone lines = 4,500 BTU/hr of sensible heat gain. Heat rejection, depending on the final building configuration, shall be either via a direct expansion split-type system with an outdoor condensing unit, or a remote outdoor glycol dry cooler. Outdoor equipment shall be thoroughly protected and secured to the facility in accordance with Code to resist damage from hurricanes and flooding.


UNCLASSIFIED


Elevator Equipment Room Provide a dedicated, stand-alone, air conditioning system to serve Elevator

Equipment Rooms. Units shall be sized in accordance with the actual equipment installed in the space and the anticipated heat gain. Heat rejection, depending on the final building configuration, shall be either via a direct expansion split-type system with an outdoor condensing unit, or a remote outdoor glycol dry cooler. Outdoor equipment shall be thoroughly protected and secured to the facility in accordance with Code to resist damage from hurricanes and flooding.

Computer Room The central Computer Room shall be provided with a dedicated, stand-alone,

precision type air conditioning system. The Unit shall be capable of cooling, heating, humidifying, and de-humidifying the space. The Unit shall be sized in accordance with the actual equipment installed in the space and the anticipated heat gain. Heat rejection, depending on the final building configuration, shall be either via a direct expansion split-type system with an outdoor condensing unit, or a remote outdoor glycol dry cooler. Outdoor equipment shall be thoroughly protected and secured to the facility in accordance with Code to resist damage from hurricanes and flooding.

Mechanical Equipment Room The Mechanical Equipment Room shall be ventilated in accordance with Code, both

in the normal mode of operation and emergency mode of operation for refrigerant exhaust. Provide a constant volume air handling unit equipped with a filter, chilled water cooling coil, hot water heating coiling, and supply air fan.

Electrical Equipment Rooms Provide a means similar to the Mechanical Equipment Room to maintain space

temperatures in Electrical Equipment Rooms. Transformer heat gains shall be calculated as follows:

o Dry Type Transformers: 120 BTU/Hr per KVA for 30 KVA to 112 KVA size transformers.

o Liquid Type Transformers: 50 BTU/Hr per KVA for 225 KVA and larger transformer sizes.

Dust Collection Exhaust System Provide a Dust Collection Exhaust System to serve the Wood Shop.

SPECIAL CONSTRUCTION

Emergency PowerAll HVAC system components shall be powered by the Emergency Generator System. Start-up of HVAC components shall be performed in a sequenced and controlled manner such that stable generator operation is achieved and maintained.


UNCLASSIFIED


Mechanical Equipment ProtectionMechanical equipment throughout the facility shall be properly protected and secured such that they can be readily brought back online after a major hurricane event. These features include but are not limited to the following:

Cooling towers shall be located in a protected area and provided with a moveable, securable structural enclosure to protect the equipment during a hurricane event.

All outside air, relief, and exhaust louvers shall be hurricane rated. Louvers shall be structurally reinforced and resistant to high-velocity impact from wind-driven debris. Consideration shall also be given to a means for completely isolating air movement through the louvers during a hurricane event through the use of sluice or bubble tight manual dampers.

Well Water SystemProvide a Well Water System to provide make-up water to the Condenser Water System in the event of a loss of City-supplied water. The system shall be sized and configured to provide adequate make-up water to the Condenser Water System for a period of seven (7) continuous days. Include a filtration system to remove particles 5 microns and larger. The well pump shall be a submersible hermetically sealed vertical turbine type unit.

BUILDING DEMOLITION AND ABATEMENTChillersRefrigerant from any existing chillers to be demolished shall be recovered and disposed of in accordance with Federal Regulations.

BoilersPrior to demolishing any existing Boiler System, all fuel oil remaining in the system shall be removed, remediated, and disposed of in accordance with Federal Regulations.

Fuel Oil System and Storage TankPrior to demolishing any existing Fuel Oil System and Storage Tank, all fuel oil in the system shall be removed, remediated, and disposed of in accordance with Federal Regulations.


UNCLASSIFIED


THIS PAGE NOT USED


UNCLASSIFIED