Attachment08-DuctlessSplitSystem_0002.pdf

OZAR PMIS 324088 3/15/2023

Div. 23 V. 2021-10-18 DUCTLESS SPLIT-SYSTEM AIR-CONDITIONERS 235416.13 Page | 1

SECTION 238186

DUCTLESS SPLIT-SYSTEM AIR CONDITIONERS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SCOPE OF WORK

A. Provide and install an operational HVAC system within the Round Springs Visitor Contact Station as it relates to the architectural plans provided. The system shall be sized to provide adequate heating and cooling which shall be sized for the Round Springs Visitor Contact facility.

The system shall be inclusive of refrigerant piping, refrigerant piping insulation, air filtration, indoor fan coil units, outdoor heat pump units, thermostat for each indoor fan coil unit.

B. Building Name/Identifier: Round Springs Visitor Contact Station

C. See Specification Section 01 10 00 – SUMMARY OF WORK for additional information.

D. Demolition work includes: as necessary to install wall mounted indoor fan coils complete with all necessary hook ups including power, refrigerant, and condensate.

1.3 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. Include rated capacities, operating characteristics, furnished specialties, and accessories.

2. Provide the load calculations for heating and cooling for approval.

3. Provide equipment submittal for the outdoor heat pump and indoor fan coil units.

4. Provide product data for refrigerant piping.

B. Shop Drawings:

1. Provide a shop drawing indicating proposed locations of indoor fan coil units and outdoor

Heat pump placement including proposed mounting.

2. Include details of equipment assemblies. Indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

3. Include diagrams for power, signal, and control wiring.

C. Samples for Initial Selection: For units with factory-applied color finishes.

1.4 INFORMATIONAL SUBMITTALS

A. Sample Warranty: For special warranty.

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1.5 CLOSEOUT SUBMITTALS

A. Operation and Maintenance Data: For the split-system to include in emergency, operation, and maintenance manuals.

1.6 MAINTENANCE MATERIAL SUBMITTALS

A. Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1.7 QUALITY ASSURANCE

A. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 5 - "Systems and Equipment" and Section 7 - "Construction and Startup."

B. ASHRAE/IES 90.1 Compliance: Applicable requirements in ASHRAE/IES 90.1, Section 6 - "Heating, Ventilating, and Air-Conditioning.”

C. ASHRAE 15, "Safety Standard for Refrigeration Systems."

D. Comply with NFPA 70.

1.8 COORDINATION

A. Coordinate sizes and locations of concrete bases with actual equipment provided. Cast anchor-bolt inserts into bases.

B. Coordinate sizes and locations of equipment supports, and penetrations with actual equipment provided.

1.9 WARRANTY

A. Special Warranty: Manufacturer agrees to repair or replace the following components of furnaces that fail in materials or workmanship within specified warranty period:

1. Warranty Period, Commencing on Date of Substantial Completion:

a. For Compressor: Five year from date of Substantial Completion.

b. For Parts: One year from date of Substantial Completion.

c. For Labor: One year from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 ASSEMBLY DESCRIPTION

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a qualified testing agency, and marked for intended location and application.

2.2 MANUFACTURERS

A. Provide products by one of the following or approved equal.

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1. Lennox

2. Mitsubishi

3. Samsung

4. Sanyo

5. York

6. LG

7. Carrier

8. Trane

9. Other Approved Equals

2.3 INDOOR UNITS (5 TONS OR LESS)

A. Concealed Evaporator-Fan Components:

1. Chassis: Galvanized steel with flanged edges, removable panels for servicing, and insulation on back of pane.

2. Insulation: Faced, glass-fiber duct liner.

3. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins and thermal-expansion valve. Comply with ARI 206/110.

4. Fan: Forward-curved, double-width wheel of galvanized steel; directly connected to motor.

5. Fan Motors:

a. Comply with NEMA designation, temperature rating, service factor, enclosure type, and efficiency requirements.

b. Multi-tapped, multispeed with internal thermal protection and permanent lubrication.

c. Wiring Terminations: Connect motor to chassis wiring with plug connection.

6. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1.

7. Filters: Permanent, cleanable.

8. Condensate Drain Pans:

a. Fabricated with one percent slope in at least two planes to collect condensate from cooling coils (including coil piping connections, coil headers, and return bends) and humidifiers, and to direct water toward drain connection.

1) Length: Extend drain pan downstream from leaving face to comply with

ASHRAE 62.1.

b. Single-wall, galvanized-steel sheet.

c. Drain Connection: Located at lowest point of pan and sized to prevent overflow.

Terminate with threaded nipple on one end of pan.

1) Minimum Connection Size: NPS 0.75.

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d. Pan-Top Surface Coating: Asphaltic waterproofing compound.

B. Wall-Mounted Evaporator-Fan Components:

1. Cabinet: Enameled steel with removable panels in color selected by Architect, and discharge drain pans with drain connection.

2. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins and thermal-expansion valve. Comply with ARI 206/110.

3. Fan: Direct drive, centrifugal.

4. Fan Motors:

a. Comply with NEMA designation, temperature rating, service factor, enclosure type, and efficiency requirements specified.

b. Multi-tapped, multispeed with internal thermal protection and permanent lubrication.

c. Enclosure Type: Totally enclosed, fan cooled.

d. NEMA Premium (TM) efficient motors as defined in NEMA MG 1.

e. Controllers, Electrical Devices, and Wiring: Comply with requirements for electrical devices and connections specified in electrical Sections.

f. Mount unit-mounted disconnect switches on exterior of unit.

5. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1.

6. Condensate Drain Pans:

a. Fabricated with one percent slope in at least two planes to collect condensate from cooling coils (including coil piping connections, coil headers, and return bends) and humidifiers, and to direct water toward drain connection.

1) Length: Extend drain pan downstream from leaving face to comply with

ASHRAE 62.1.

2) Depth: A minimum of 1 inch deep.

b. Single-wall, galvanized-steel sheet.

c. Drain Connection: Located at lowest point of pan and sized to prevent overflow.

Terminate with threaded nipple on one end of pan.

1) Minimum Connection Size: NPS 0.75.

7. Air Filtration Section:

a. General Requirements for Air Filtration Section:

1) Comply with NFPA 90A.

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2) Minimum MERV according to ASHRAE 52.2.

3) Filter-Holding Frames: Arranged for flat or angular orientation, with access doors. Filters shall be removable from one side or lifted out from access plenum.

2.4 OUTDOOR UNITS (5 TONS (18 kW) OR LESS)

A. Air-Cooled, Compressor-Condenser Components:

1. Casing: Steel, finished with baked enamel in color selected by COR, with removable panels for access to controls, weep holes for water drainage, and mounting holes in base. Provide brass service valves, fittings, and gage ports on exterior of casing.

2. Compressor: Hermetically sealed with crankcase heater and mounted on vibration isolation device. Compressor motor shall have thermal- and current-sensitive overload devices, start capacitor, relay, and contactor.

a. Compressor Type: Invertor Scroll.

b. Refrigerant: R-410A.

c. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins and liquid subcooler. Comply with ARI 206/110.

B. Heat-Pump Components: Reversing valve and low-temperature-air cutoff thermostat.

1. Fan: Aluminum-propeller type, directly connected to motor.

2. Motor: Permanently lubricated, with integral thermal-overload protection.

3. Low Ambient Kit: Permits operation down to 0 deg F (-17 deg C).

4. Mounting Base: Poured Concrete.

2.5 Accessories:

A. Thermostat: Wireless infrared functioning to remotely control compressor and evaporator fan, with the following features:

1. Compressor time delay.

2. 24-hour time control of system stop and start.

3. Liquid-crystal display indicating temperature, set-point temperature, time setting, operating mode, and fan speed.

4. Fan-speed selection including auto setting.

B. Automatic-reset timer to prevent rapid cycling of compressor.

C. Refrigerant Line Kits: Soft-annealed copper suction and liquid lines factory cleaned, dried, pressurized, and sealed; factory-insulated suction line with flared fittings at both ends.

D. Drain Hose: For condensate.

E. Base: Base Pan heater

2.6 CAPACITIES AND CHARACTERISTICS

A. Cooling Capacity:

1. Total: [As determined by Contractor] Btu/h. (#1)

2. SEER: (16.0 Minimum) (#2)

3. EER: (10.0 Minimum) (#3)

4. Entering-Air Temperature:

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a. Dry Bulb: 80 deg F.

b. Wet Bulb: 67 deg F .

B. Heating Capacity:

1. Type: Electric, Heat Pump.

2. Total Capacity: [As determined by Contractor] Btu/h. (#4)

3. Heating Season Performance Factor: [9.8 minimum].

C. Indoor Unit:

1. Fan Motor Electrical Characteristics:

a. Power Supply: As supplied by Outdoor Unit..

b. Rated load amps (RLA): [As dictated by Contractor load]. (#5)

c. Power Output (W): [As dictated by Contractor load]. (#6)

2. Airflow: [As dictated by Contractor load] cfm. (#7).

D. Outdoor Unit:

1. Type: Air cooled.

2. Electrical Characteristics:

a. Volts: 208. (#8)

b. Phase: Single. (#8)

c. Hertz: 60. (#8)

d. Minimum Circuit Ampacity (MCA): [As dictated by Contractor load]. (#9)

e. Maximum Overcurrent Protection (MOP): [As dictated by Contractor load]. (#10)

f. Fan Motor Rated-Load Amperes: [As dictated by Contractor load]. (#11)

g. Compressor Rated-Load Amperes: [As dictated by Contractor load]. (#12)

3. Sound-Pressure Level – Cooling/Heating: [As dictated by Contractor load]. (#13)

2.7 THERMOSTATS

A. Controls shall comply with requirements in ASHRAE/IES 90.1, Section 6 - "Heating, Ventilating, and Air Conditioning."

B. Solid-State Thermostat: Wall-mounted, programmable, microprocessor-based unit with automatic switching from heating to cooling, preferential rate control, seven-day programmability with minimum of four temperature presets per day, and battery backup protection against power failure for program settings.

C. Control Wiring: Balanced twisted-pair cabling.

1. Description: Screened and shielded twisted pairs (F/FTP), No. 24 AWG, 100 ohms, four pair.

2. Cable Jacket Color: Blue.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install units level and plumb.

B. Install evaporator-fan components using manufacturer's standard mounting devices securely fastened to building structure. Consult with COR to verify mounting location.

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C. Install roof-mounted, compressor-condenser components on equipment supports. Anchor units to supports with removable, cadmium-plated fasteners.

D. Equipment Mounting:

1. Install ground-mounted, compressor-condenser components on stand on cast-in-place concrete equipment base(s).

E. Install and connect pre-charged refrigerant tubing to component's quick-connect fittings. Install tubing to allow access to unit.

3.2 CONNECTIONS

A. Piping installation requirements are specified in other Sections. Drawings indicate general arrangement of piping, fittings, and specialties.

B. Where piping is installed adjacent to unit, allow space for service and maintenance of unit.

3.3 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust components, assemblies, and equipment installations, including connections.

B. Perform tests and inspections.

1. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect components, assemblies, and equipment installations, including connections, and to assist in testing.

C. Tests and Inspections:

1. Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.

2. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

D. Remove and replace malfunctioning units and retest as specified above.

E. Prepare test and inspection reports.

3.4 STARTUP SERVICE

A. Perform startup service.

1. Complete installation and startup checks according to manufacturer's written instructions.

3.5 DEMONSTRATION

A. Train Owner’s maintenance personnel to adjust, operate, and maintain units.

END OF SECTION

C. Samples for Initial Selection: For units with factory-applied color finishes.

d. Pan-Top Surface Coating: Asphaltic waterproofing compound.

2. Airflow: [As dictated by Contractor load] cfm. (#7).

3. Sound-Pressure Level – Cooling/Heating: [As dictated by Contractor load]. (#13)

E. Install and connect pre-charged refrigerant tubing to component's quick-connect fittings. Install tubing to allow access to unit.