The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for [Contractor Quality Control approval.] [information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government.] The following shall be submitted in accordance with Section 01330 01330 01330 SUBMITTAL PROCEDURES:

Piping shall be welded in accordance with the qualified procedures, using performance qualified welders and welding operators in accordance with ASME BPVC SEC IX. Welding procedures qualified by others, and welders and welding operators qualified by another employer may be accepted as permitted by ASME B31.1. The Contracting Officer shall be notified 24 hours in advance of tests and the tests shall be performed onsite, if practical. The welder or welding operator shall apply the assigned symbol near each weld personally made as a permanent record. Structural members shall be welded in accordance with [Section 05090A 05090A 05090A WELDING, STRUCTURAL] [welding and nondestructive testing procedures specified in Section 05093 05093 05093 WELDING PRESSURE PIPING].

Exposed moving parts, parts that produce high operating temperature, parts which may be electrically energized, and parts that may be a hazard to operating personnel shall be insulated, fully enclosed, guarded, or fitted with other types of safety devices. Safety devices shall be installed so that proper operation of equipment is not impaired. [[Catwalk] [Ladder] [Guardrail] shall be provided where indicated and in accordance with Section 05500 05500 05500 METAL: MISCELLANEOUS AND FABRICATIONS.]

All equipment delivered and placed in storage shall be stored with protection from the weather, humidity and temperature variations, dirt and dust, or other contaminants.

After becoming familiar with all details of the work, the Contractor shall verify all dimensions in the field, and shall advise the Contracting Officer of any discrepancy before performing any work.

Because of the small scale of the drawings, it is not possible to indicate all offsets, fittings, and accessories that may be required. The Contractor shall carefully investigate the plumbing, fire protection, electrical, structural and any other features or conditions that would affect the work to be performed and shall arrange such work accordingly, furnishing required offsets, fittings, and accessories to meet such features or conditions. The Contractor shall submit Drawings consisting of:

The Contractor shall submit spare parts data for each different item of material and equipment specfied, after approval of the detail drawings and not later than [_____] months prior to the date of beneficial occupancy. The data shall include a complete list of parts and supplies, with source of supply.

Materials and equipment shall be the standard products of a manufacturer regularly engaged in the manufacturing of such products and shall essentially duplicate equipment which is similar in material, design, and workmanship. The standard products shall have been in satisfactory commercial or industrial use for two years prior to bid opening. The two-year use shall include applications of equipment and materials under similar circumstances and of similar size. The two years experience shall be satisfactorily completed by a product which has been sold or is offered for sale on the commercial market through advertisements, manufacturer's catalogs, or brochures. Products having less than a two-year field service record will be acceptable if a certified record of satisfactory field operation, for not less than 6000 hours exclusive of the manufacturer's factory tests, can be shown. All products shall be supported by a service organization. The Contractor shall submit a certified list of qualified, permanent service organizations for support of the equipment including their addresses and qualifications. These service organizations shall be reasonably convenient to the equipment installation and shall be able to render satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract. The system shall be a complete stand alone system with all necessary controls, motors, fans, rotors, motors, drive components, pumps, reactivation components and filtration to provide automatic continuous operation. Internal regeneration heat sources shall be a part of the system, except external heat sources may be used under the following conditions: connections to external heat sources shall be fully coordinated with the system manufacturer, and connecting equipment such as pumps, piping, traps, etc., shall be as shown on the drawings and schedules. The desiccant shall be of the [solid type on a rotary wheel] [liquid type utilizing spray coils].

Each major component of equipment shall have the manufacturer's name, address, type or style, and catalog or serial number on a plate securely attached to the item of equipment. Nameplates shall be secured to the cabinet of dry desiccant units, indicating the equipment enclosed within the cabinet behind the nameplate. Cabinets shall have hinged panels, as specified, to facilitate maintenance of the component described on the nameplate secured to the cabinet.

Electrical equipment, motors, motor efficiencies, and wiring shall be in accordance with Section 16402 16402 16402 INTERIOR DISTRIBUTION SYSTEM. Electrical motor driven equipment specified shall be provided complete with motors, motor starters, and controls (including variable speed control of process air flow for solid units, where applicable). Electrical characteristics and enclosure type shall be as shown, and unless otherwise indicated, all motors of 1 horsepower and above with open, dripproof, or totally enclosed fan cooled enclosures, shall be high efficiency type. Field wiring shall be in accordance with manufacturer's instructions. Each motor shall conform to NEMA MG 1 and be of sufficient size to drive the equipment at the specified capacity without exceeding the nameplate rating of the motor. All motors shall be continuous duty with the enclosure specified. Motor starters shall be provided complete with thermal overload protection and other appurtenances necessary for the motor control indicated. Motors shall be furnished with a magnetic across-the-line or reduced voltage type starter as required by the manufacturer. Motor starter shall be provided with [NEMA 1] [NEMA 3R] [NEMA [_____]] enclosures. Manual or automatic control and protective or signal devices required for the operation specified and any control wiring required for controls and devices specified, but not shown, shall be provided.

Gaskets shall conform to ASTM F 104 classification for compressed sheet with nitrile binder and acrylic fibers for maximum 371 degrees C 700 degrees F service.

Bolts and nuts, except as required for piping applications, shall be in accordance with ASTM A 307. The bolt head shall be marked to identify the manufacturer and the standard with which the bolt complies in accordance with ASTM A 307.

The unit shall be a complete, factory assembled and tested system, suitable for outdoor installation. Each unit shall produce a capacity as rated in accordance with ARI 210/240. It shall be designed for either curb mounting or structural steel support. The unit shall include the following components as defined in paragraph SYSTEM COMPONENTS:

Each unit shall be factory wired and equipped with a central electrical control panel mounted inside the service compartment. Variable-speed drive controller, if provided, shall also be mounted inside the service compartment. Switched lighting shall be provided in the service compartment so that the panel can be easily seen. Compartment shall be ventilated, if necessary, for cooling variable speed drive controller. A single power supply shall be required. All internal wiring shall be in accordance with the National Electrical Code. All electrical components required for automatic operation, based on signals from remotely mounted humidity and temperature sensors/controllers, shall be included. Connections to remote devices shall be made at the marked terminals. The internal control panel shall report discharge temperature and humidity. Additional reporting of all control data shall be available to a central control station, as specified in Section 15951 15951 15951 DIRECT DIGITAL CONTROL FOR HVAC AND OTHER LOCAL BUILDING SYSTEMS.

The unit shall be [curb mounted] [structural steel supported]. The entire unit shall be isolated from the building structure on vibration isolators with submitted and published load ratings. Vibration isolators shall have isolation characteristics as recommended by the manufacturer for the unit supplied and the service intended.

The unit shall be a complete, factory assembled and tested, system suitable for outdoor installation. Each unit shall produce a capacity as rated in accordance with ARI 210/240. It shall be designed for [curb mounting] [structural steel support]. The unit shall include the following components as defined in paragraph SYSTEM COMPONENTS:

Each unit shall be factory wired and equipped with a central electrical control panel mounted inside the service compartment. A single power supply shall be required. All internal wiring shall be in accordance with the National Electrical Code. All electrical components required for automatic operation, based on signals from remotely mounted humidity and temperature sensors/controllers, shall be included. Connections to remote devices shall be made at the marked terminals. The internal control panel shall report discharge temperature and humidity. Additional reporting of all control data shall be available to a central control station, as specified in Section 15951 15951 15951 DIRECT DIGITAL CONTROL FOR HVAC AND OTHER LOCAL BUILDING SYSTEMS.

Liquid desiccant systems shall have the conditioner and regenerator units set on level concrete floor or slab. Before the equipment is set in place, the floor shall be sealed with epoxy sealant. Unit shall be surrounded by a curb.

Dehumidifiers shall be non-cyclic adsorption type with a single desiccant rotary structure designed for continuous operation. Construction arrangement shall provide counter flow of process and regeneration air streams with full face pressure seals to prevent cross leakage with static pressure differentials up to 200 mm 8 inches water gauge. The rotary structure shall consist of a stable, hygroscopic desiccant material, such as Silica Gel, Titanium Silicate, or a Zeolite, deposited on a honey-combed substrate designed to maximize the desiccant area exposed to the air stream and minimize the thermal carryover from the regeneration side to the adsorption side. The design shall ensure laminar air flow through the structure for minimum pressure loss. The rotor shall be complete with an electric motor with over-current protection and a speed reducer assembly driving the rotor through a flexible circumferential drive belt. A slack side belt tensioner shall be included for automatic take-up.

The thermal rotor shall be of the rotary, non-hygroscopic type, to minimize the transfer of water vapor between the process and regeneration sides of the unit. The rotor shall be constructed and sized to maximize the transfer of heat from the supply air stream to the regeneration air stream while minimizing the transfer of moisture back to the supply air stream. Supply and cooling air streams shall be counter flow and the component fitted with full face contact seals on both sides to prevent leakage.

Heat pipe coils shall be of the extended-surface fin-and-tube type and shall be constructed of seamless [copper] [or] [aluminum] tubes with compatible [copper] [or] [aluminum] fins. On heat pipes with all aluminum construction, tubes shall conform to ASTM B 210MASTM B 210, alloy 1100 and aluminum alloy conforming to chemical requirements of ASTM B 209MASTM B 209; alloy 7072 shall be used for the fins and end sheets. Fins shall be soldered or mechanically bonded to the tubes and installed in a metal casing. Coils shall be tested after assembly at pressure specified in ASHRAE 15 for the refrigerant employed in the system. [After testing of the heat pipe coils, coils shall be dried to remove free moisture, and capped to prevent entrance of foreign matter.]

Refrigerants shall be one of the hydrocholrofluorocarbon or hydrofluorocarbon gases. Refrigerants shall have number designations and safety classifications in accordance with ASHRAE 34. Refrigerants shall meet the requirements of ARI 700 as a minimum. Refrigerants shall have an Ozone Depletion Potential (ODP) of less than or equal to 0.05 and shall be in compliance with pertinent EPA regulations. The unit shall be factory leak tested and dehydrated, as specified in Section [ 15181 15181 15181 CHILLED, CHILLED-HOT, AND CONDENSER WATER PIPING SYSTEMS] [ 15182 15182 15182 REFRIGERANT PIPING] [ [_____] [_____] [_____]].

The unit shall be equipped with two belt driven backward inclined blowers. A drive belt rated for minimum 150% of motor horsepower shall be used on each motor. The supply fan motor shall have sheaves for air balancing. The motors shall be nominal 3500 RPM, NEMA B with open dripproof housings and a minimum service factor of 1.15.

Regeneration and process heating coils shall be of the finned tube type, and shall be constructed of 13 mm 1/2 inch OD seamless copper tube mechanically bonded to aluminum fins. The coils shall include a flanged, heavy-gauge, galvanized steel housing for mounting to the unit. The coils shall be rated for 1135 kPa 150 psig.

Outside air inlets and return air plenums shall be equipped with 50 mm 2 inch, 30% minimum efficiency filters. Filters shall be pleated and disposable.

Evaporative cooling shall be used to indirectly cool the supply air. The system shall include: An evaporative cooling media of cellulose paper impregnated to resist degradation and PVC piping.

The boiler shall be a gas-fired water heater suitable for delivering fluid temperatures of 99-104 degrees C 210-220 degrees F. It shall have a copper tube exchanger and cast iron wet walls. It shall be complete with all controls, including an automatic gas valve, automatic pilot spark ignition system, power draft inducer, supply water control temperature sensor, and suitable safety controls. The hydronic system shall include properly sized diaphragm type expansion tank. Diaphragm shall be flexible butyl securely attached to inner tank wall. Maximum allowable working pressure shall be at least 791 kPa 100 psig, and 116 degrees C 240 degrees F temperature.

Evaporative cooling pump shall be a submersible pump with a hooded intake, polypropylene screen, and thermal overload protection. Boiler pump shall be an in-line close coupled single stage centrifugal.

The refrigeration loop shall be integral to the unit, and factory charged. The condenser section shall provide the heat required to regenerate the desiccant rotor, and the evaporator section shall provide additional cooling/dehumidification. Refrigerants shall be one of the hydrocholrofluorocarbon or hydrofluorocarbon gases. Refrigerants shall have number designations and safety classifications in accordance with ASHRAE 34. Refrigerants shall meet the requirements of ARI 700 as a minimum. Refrigerants shall have an Ozone Depletion Potential (ODP) of less than or equal to 0.05 and shall be in compliance with EPA regulations. The unit shall be factory leak tested and dehydrated, as specified in Section [ 15181 15181 15181 CHILLED, CHILLED-HOT, AND CONDENSER WATER PIPING SYSTEMS] [ 15182 15182 15182 REFRIGERANT PIPING] [or] [Section 15700A 15700A 15700A UNITARY HEATING AND COOLING EQUIPMENT].

The conditioner unit shall consist of a watertight housing containing the sump, inlet air diffusers, desiccant solution-to-air contact surface, desiccant solution distribution system and mist eliminator system; and a free standing pump assembly with tank, vertical seal-less solution pump and motor, and full-flow solution filter screen. The housing and pump tank shall be fabricated from corrosion resistant materials resistant to the desiccant solution. Internal parts shall be made of cupronickel or nonmetallic corrosion-proof materials. The desiccant solution pump and all other wetted parts shall be made with corrosion resistant materials. Fiberglass reinforced plastic surfaces shall be pigmented and U.V. stabilized for exposure to direct sunlight.

The humidity conditioning system shall be of the liquid desiccant type. The system shall be capable of simultaneous air cooling and dehumidification as indicated on the drawings. The system shall automatically, fully modulate the usage of conditioner coolant and regenerator heat to match the system cooling and dehumidification loads. The humidity conditioning system shall deliver air containing not more than 5 microorganisms per 0.3 Cu. m 10 Cu. Ft, as measured by the Six-Plate Andersen Sampling Method, provided the supply air to the system contains not more than 100 organisms per 0.3 Cu. m 10 Cu. Ft.

The desiccant solution shall be stable and non-toxic and the desiccant shall not exist in the vapor phase in the conditioned air stream. The maximum loss rate of desiccant to the conditioned air stream shall not exceed two parts lithium per billion parts air, by weight. The manufacturer shall provide the end user with analysis and recommendations for maintenance of the desiccant solution six times yearly, free of charge, for the life of the equipment.

The conditioner desiccant solution cooler shall be of the plate-and-frame type, with carbon steel frame carrier bars and tiebolts; titanium plates and nitrite or EPDM gaskets. The solution heater shall be supplied complete with heating fluid control valve. The heat exchangers shall be shipped loose for field installation.

The regenerator units shall each consist of a watertight housing containing the sump, inlet air diffusers, desiccant solution-to-air contact surface, desiccant solution distribution system and mist eliminator system; and a free standing pump assembly with tank, vertical seal-less solution pump and motor, and full-flow solution filter screen. The housing and pump tank shall be fabricated of corrosion resistant materials resistant to the desiccant solution. Internal parts shall be made of cupronickel or nonmetallic corrosion-proof materials. The desiccant solution pump and all other wetted parts shall be made with corrosion resistant materials resistant to the desiccant solution. Fiberglass reinforced plastic surfaces shall be pigmented and U.V. stabilized for exposure to direct sunlight.

The humidity conditioning system shall consist of separate conditioning and desiccant regeneration units providing complete separation of conditioned and regeneration air streams. The manufacturer shall guarantee that there will be no cross-leakage of conditioner and regenerator air streams under any circumstances.

The regenerator shall be supplied with a separate field-mounted fan and fan box assembly, consisting of housing, forward-curved fan motor, and drive. The fan wheel shall be made of steel. The fan box shall be made of galvanized steel. The fan wheel and fan box interior shall be heresite coated. The fan box exterior shall be painted with a prime and finish coat of industrial-grade acrylic machine enamel.

The equipment shall be so designed that the conditioner and regenerator units need not be installed in the same location, and may be located wherever convenient. Where units are installed outside, weatherproof insulation is required and adequate freeze protection for water, steam, and condensate piping is required.

The regenerator solution heater shall be of the plate-and-frame type, with carbon steel frame carrier bars and tiebolts; titanium plates and nitrite or EPDM gaskets. The solution heater shall be supplied complete with heating fluid control valve. The heat exchangers shall be shipped loose for field installation.

The level control panel shall consist of safety interlock pressure switch, unit pressure drop indicator, bubbler type supply pneumatics, P/I transducer, I/P transducer, and PID single-loop controller, all contained in a NEMA 12 enclosure. The level control panel shall be shipped mounted to the unit.

The unit shall be equipped with noncorrosive diffuser and filtering system capable of filtering any droplets in the air stream and diffusing the stream for uniform airflow distribution.

The conditioner and regenerator shall be equipped with a freestanding seal-less pump and motor. The pumps shaft shall be made with an corrosion resistant materials suitable for the desiccant solution and all other wetted parts of vinylester FRP, or equal.

The unit shall be equipped with piping, valving, and controls to automatically maintain solution level in the conditioner section. The level control panel shall consist of a safety interlock pressure switch, unit pressure drop indicator, bubbler tube ("type" is indicated above) supply pneumatics, P/I transducer, I/P transducer, and PID single-loop controller, all contained in a NEMA 12 enclosure. The level control panel shall be shipped mounted to the unit.

The unit shall be equipped with a conditioner fan only to the extent necessary to supply static pressure to existing equipment, or if used as a stand alone unit, as specified in Section 15895 15895 15895 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM.

The regeneration fan shall be supplied with a separate field-mounted fan and assembly rated for the requirements of the regeneration system. The fan and assembly shall be of such design and construction to be resistant to the chemicals within the regenerator, as specified in Section 15895 15895 15895 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM.

Unit shall be suitable for outdoor installation. It shall be designed for either structural or curb mounting without field modification. The enclosure system shall be air-tight (2% maximum leakage at 150% design static pressure from section to section). The unit base shall be constructed of formed minimum 10 GA steel coated with red- oxide primer. Cross members shall be located to support each major component. Lifting lugs shall be fitted to appropriate structural members. Unit exterior shall be painted with a low-gloss enamel.

The unit housing and internal partitions shall be constructed of minimum 18 GA galvanized steel with the exterior panels treated to allow for painting. All external walls shall be insulated with foil-faced fiber glass insulation at least 25 mm 1 inch thick and secured by permanent mechanical fasteners welded to the panels. Adjoining panels shall be sealed by permanent mechanical fasteners welded to the panels. Adjoining panels shall be sealed to one another with silicone compound, as specified in Section 15080 15080 15080 THERMAL INSULATION FOR MECHANICAL SYSTEMS.

Removable service access panels shall be provided for all components. The openings shall be of sufficient size to allow service to all maintenance items. All service panels shall be provided with resilient gaskets and hardware to assure compression. Access doors shall be provided for boiler and control sections and shall have continuous hinges. Roof panels shall be sealed to provide a weather-tight enclosure.

The unit shall consist of conditioner and regenerator watertight housings containing the sump of vinylester FRP with additives to achieve a U.L. Class 1 flame spread rating, or equal. The conditioner cooler, and regenerator heater shall be of the plate-and-frame type, with carbon steel frame carrier bars and tiebolts; titanium plates and nitrile or EPDM gaskets.

The conditioner piping shall be FRP or CPVC rated for continuous service at 107 degrees C 225 degrees F with the desiccant solution. FRP piping shall be used for the regenerator. Blackiron, galvanized and stainless steel shall not be used. CPVC piping shall be Schedule 80, Type IV, Grade 1, 4120, in accordance with ASTM D 1784, as specified in Section 15400 15400 15400 PLUMBING, GENERAL PURPOSE. The piping shall be supported so that no stress is placed on connections to the equipment. Piping shall be installed at least 610 mm 2 ft away from all maintenance access openings and belt guards. Solution pump discharge piping must be arranged to allow removal of the pump from the pump tank. The pump discharge piping shall incorporate a 90 degree elbow or a vertical spool piece at least 1.2 m 4 ft long so the pump can be lifted vertically from the tank. All piping shall be pressure tested for leaks before insulating. If possible, equipment start-up should be completed before the insulation is applied.

Valves in the conditioner solution piping shall be made of CPVC, thermoplastic-lined cast iron, or as recommended by the manufacturer. Thermowells in the solution piping shall be monel or TFE-coated steel. Stainless steel thermowells are not acceptable. All pipe fittings shall be flanged when possible. Threaded fittings and connections shall be avoided. Red rubber or neoprene full-face gaskets shall be used in flanged connections.

Conditioners shall be insulated whenever a coolant other than cooling tower water is used to prevent surface condensation. The entire unit including the solution and coolant piping shall be insulated. Flexible rubber, rigid foam plastic, or other non-permeable, vapor-tight insulation material shall be used for conditioners. When the equipment is installed outside, an ultraviolet and weather protective coating should be applied to the insulation. Regenerators and steam or hot water piping should be insulated with 50 mm 2 inch of rigid, foil- or plastic-faced, fiberglass board. Solution piping shall be insulated if required for personnel protection. If the equipment is installed outside, weather protective covering shall be applied. The outer casing of the conditioner and regenerator shall not be penetrated with insulation fasteners. Contact cement or other adhesive as recommended by the insulation manufacturer for use with an FRP substrate shall be used for insulation fastening. Insulation shall conform to Section 15080 15080 15080 THERMAL INSULATION FOR MECHANICAL SYSTEMS.

Desiccant units shall be provided with flanges on the air openings for duct connection. Inlet and outlet plenums shall be bolted to the flange with a gasket between the connection. Access doors, for servicing diffusers and eliminators, shall be provided in the inlet and outlet plenums. Inlet ductwork must be designed to allow uniform distribution of air across the entire opening. Outlet plenums and ductwork must allow adequate room for servicing the eliminators and must provide proper airflow through the equipment. Plenum and ductwork sizes shall be as shown and specified in Section 15895 15895 15895 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM.

The regenerator exhaust ductwork shall be made of glass-fiber reinforced polyester (FRP) or monel. FRP must be rated for continuous duty at 82 degrees C 180 degrees F. Duct joints should be of watertight construction. The exhaust plenum and duct should incorporate a drip collar to capture any condensation that occurs inside the duct. Long horizontal duct runs should be pitched slightly in the direction of air flow, and shall incorporate low-point condensate drains.

Piping shall comply with the requirements of Section 15400 15400 15400 PLUMBING, GENERAL PURPOSE. Drains which connect to sanitary sewer system shall be connected by means of an indirect waste.

Steam piping and accessories shall be provided and installed in accordance with Section 15569A 15569A 15569A WATER AND STEAM HEATING; OIL, GAS OR BOTH; UP TO 20 MBTUH.

All work shall be performed in accordance with the manufacturer's published diagrams, recommendations, and equipment warranty requirements.

Necessary supports shall be provided for all equipment, appurtenances, and pipe as required, including frames or supports. Housings shall be isolated from the building structure. If mechanical vibration isolators are not provided, vibration absorbing foundations shall be furnished. Each foundation shall include isolation units consisting of machine and floor or foundation fastenings, together with intermediate isolation material. Other floor-mounted equipment shall be set on not less than a 150 mm 6 inch concrete pad doweled in place. Concrete foundations for floor mounted pumps shall have a mass equivalent to three times the weight of the components, pump, base plate, and motor to be supported. In lieu of concrete pad foundation, concrete pedestal block with isolators placed between the pedestal block and the floor may be provided. Concrete pedestal block shall be of mass not less than three times the combined pump, motor, and base weights. Isolators shall be selected and sized based on load-bearing requirements and the lowest frequency of vibration to be isolated. Isolators shall limit vibration to [_____] percent at lowest equipment rpm. Lines connected to pumps mounted on pedestal blocks shall be provided with flexible connectors. Foundation drawings, bolt-setting information, and foundation bolts shall be furnished prior to concrete foundation construction for all equipment indicated or required to have concrete foundations. Concrete for foundations and concrete-structured or cast-cooling towers shall be as specified in Section 03300A 03300A 03300A CAST-IN-PLACE STRUCTURAL CONCRETE. Equipment shall be properly leveled, aligned, and secured in place in accordance with manufacturer's instructions.

Contractor shall provide the conditioner solution concentration capable of maintaining the humidity level specified on the drawings.

Automatic controls for the specified desiccant system shall be provided with the desiccant equipment. These controls shall operate automatically to balance the equipment capacity with the load on the air conditioning system, and shall be fully coordinated with and integrated into the [temperature control system specified in Sections 15895 15895 15895 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM and 15951 15951 15951 DIRECT DIGITAL CONTROL FOR HVAC AND OTHER LOCAL BUILDING SYSTEMS] [existing air-conditioning system].

All piping, valve, and duct installation shall be made in accordance with the desiccant equipment manufacturers recommendation or in accordance with Sections 15895 15895 15895 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM, [ 15181 15181 15181 CHILLED, CHILLED-HOT, AND CONDENSER WATER PIPING SYSTEMS] [ 15182 15182 15182 REFRIGERANT PIPING] [ [_____] [_____] [_____]], and 15400 15400 15400 PLUMBING, GENERAL PURPOSE.

Before each desiccant system is accepted, tests to demonstrate the general operating characteristics of all equipment shall be conducted by a registered professional engineer or an approved manufacturer's startup representative experienced in system startup and testing, at such times as directed. The tests shall measure quantities listed below. Tests shall cover a period of not less than [_____] days for each system and shall demonstrate that the entire system is functioning in accordance with the drawings and specifications. Corrections and adjustments shall be made as necessary and tests shall be re-conducted to demonstrate that the entire system is simultaneously functioning as specified. A report shall be prepared for each desiccant system, including the information outlined below. Data for the tests shall be taken at least three different times at outside wet-bulb temperatures which are at least 3 degrees C 5 degrees F apart.

Color code marking of piping shall be as specifried in Section 09900 09900 09900 PAINTS AND COATINGS.

The manufacturer of the liquid desiccant system shall supply, free of charge, testing of solution samples sent to them by the customer every two months for the life of the equipment. The manufacturer of each type system shall inspect the systems after one year of operation to insure the systems are operating properly.

The services of a factory-trained representative shall be provided for [_____] days. The representative shall advise on the proper operation and servicing of the equipment and make any adjustments necessary to insure full compliance with design criteria.

Equipment shall be wiped clean, with all traces of oil, dust, dirt, or paint spots removed. Temporary filters shall be provided for all fans that are operated during construction, and new filters shall be installed after all construction dirt has been removed from the building. System shall be maintained in this clean condition until final acceptance. Bearings shall be properly lubricated with oil or grease as recommended by the manufacturer. Belts shall be tightened to proper tension. Control valves and other miscellaneous equipment requiring adjustment shall be adjusted to the setting indicated or directed. Fans shall be adjusted to the speed indicated by the manufacturer to meet specified conditions.

Contractor shall conduct a training course for the operating staff as designated by the Contracting Officer. The training period shall consist of a total [_____] hours of normal working time and start after the system is functionally completed but prior to final acceptance tests. The field instructions shall cover all of the items contained in the Operation and Maintenance Manuals as well as demonstrations of routine maintenance operations.