237200 - AIR TO AIR ENERGY RECOVERY EQUIPMENT.pdf

Renovation of Historical Building 4

Project #565 20 101

03-01-20

AIR-TO-AIR ENERGY RECOVERY EQUIPMENT

23 72 00-1

SECTION 23 72 00

AIR-TO-AIR ENERGY RECOVERY EQUIPMENT

PART 1 - GENERAL

1.1 DESCRIPTION

This Section specifies air-to-air plate heat exchangers.

1.2 RELATED WORK

A. Section 01 00 00, GENERAL REQUIREMENTS: Requirements for pre-test of equipment.

B. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES.

C. Section 01 91 00, GENERAL COMMISSIONING REQUIREMENTS

D. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL

COMPONENTS: Seismic requirements for non-structural equipment.

E. Section 23 05 11, COMMON WORK RESULTS FOR HVAC: General mechanical requirements and items, which are common to more than one section of

Division 23.

F. Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC and STEAM

GENERATION EQUIPMENT.

G. Section 23 05 93, TESTING, ADJUSTING and BALANCING FOR HVAC:

Requirements for testing, adjusting and balancing of HVAC system.

H. Section 23 07 11, HVAC and BOILER PLANT INSULATION: Requirements for piping insulation.

I. Section 23 08 00 – COMMISSIONING OF HVAC SYSTEMS: Requirements for commissioning, systems readiness checklists, and training.

J. Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC: Requirements for controls and instrumentation.

K. Section 23 40 00, HVAC AIR CLEANING DEVICES: Requirements for filters used before heat recovery coils.

1.3 QUALITY ASSURANCE

A. Refer to specification Section 01 00 00, GENERAL REQUIREMENTS for performance tests and instructions to VA personnel.

B. Refer to paragraph QUALITY ASSURANCE in specification Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

C. Performance Criteria: Heat recovery equipment shall be provided by a manufacturer who has been manufacturing such equipment and the equipment has a good track record for at least 3 years.

D. Performance Test: In accordance with PART 3.

03-01-20

AIR-TO-AIR ENERGY RECOVERY EQUIPMENT

23 72 00-2

1.4 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, and SAMPLES.

B. Manufacturer's Literature and Data:

1. Total Energy Core Plate Heat Exchanger

C. Certificate: Submit, simultaneously with shop drawings, an evidence of satisfactory service of the equipment on three similar installations.

D. Submit type, size, arrangement and performance details. Present application ratings in the form of tables, charts or curves.

E. Provide installation, operating and maintenance instructions, in accordance with Article, INSTRUCTIONS, in Section 01 00 00, GENERAL

REQUIREMENTS.

F. Completed System Readiness Checklists provided by the Commissioning

Agent and completed by the contractor, signed by a qualified technician and dated on the date of completion, in accordance with the requirements of Section 23 08 00 COMMISSIONING OF HVAC SYSTEMS.

1.5 APPLICABLE PUBLICATIONS

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

B. Air Conditioning, Heating, and Refrigeration Institute (AHRI)

1060-2018...............Performance Rating of Air-to-Air Heat

Exchangers for Energy Recovery Ventilation

Equipment

C. American Society of Heating, Refrigeration and Air Conditioning

Engineers (ASHRAE):

15-2019.................Safety Standard for Refrigeration Systems

(ANSI)

52.1-1999...............Gravimetric and Dust-Spot Procedures for

Testing Air-Cleaning Devices Used in General

Ventilation for Removing Particulate Matter

52.2-2017...............Method of Testing General Ventilation Air-

Cleaning Devices for Removal Efficiency by

Particle Size

62.1-2016...............Ventilation for Acceptable Indoor Air Quality

84-2013.................Method of Testing Air-to-Air Heat/Energy

Exchangers

D. American Society for Testing and materials (ASTM)

03-01-20

AIR-TO-AIR ENERGY RECOVERY EQUIPMENT

23 72 00-3

D635-2018...............Standard Test Method for Rate of Burning and/or

Extent and Time of Burning of Plastics in a

Horizontal Position

E84-2014................Standard Test Method for Surface Burning

Characteristics of Building Materials

E. American Society of Civil Engineers (ASCE)

ASCE 7-2017.............Minimum Design Loads for Buildings and Other

Structures

F. Underwriters Laboratories, Inc (UL)

1812-2013...............Standard for Ducted Heat Recovery Ventilators

1815-2015...............Standard for Nonducted Heat Recovery

Ventilators

PART 2 - PRODUCTS

2.1 AIR-TO-AIR PLATE HEAT EXCHANGER

A. Comply with UL Standards 1812.

B. Plates: Corrugated 0.53 mm (0.021 inch) polypropylene copolymer (high density plastic), enthalpic energy exchange with plate spacing as recommended by the manufacturer.

C. Bedding: Thermosetting reinforced resin. Provide plate seal-off and passage separation at top, bottom and center divider. The resins shall be self-extinguishing type in accordance with ASTM D635.

D. Casing: Casing of 22 gage galvanized steel with factory painting, 1-inch double wall insulated panel. Interior lining shall be solid 22 gage galvanized steel.

E. Doors: Doors shall be made of same materials as casing with hinges and door handles. Doors shall seal air tight.

F. Casings shall have integral flanges for flanged duct connections and shall have lifting holes or lugs.

G. Drain Pan: Same material as unit casing. Drain-pan surface shall be covered with molded ABS, and shall have drain connections on exhaust and supply side. Comply with requirements in ASHRAE 62.1.

H. Fans: Direct drive plenum type fans with Electrically Commutated

Motors.

I. DX Coils: Provide a factory fitted refrigerant coil package with a heat pump (heating and cooling) coil and a Hot Gas Reheat coil suitable for connection to the VRF system.

I. Accessories: Furnish where indicated on the drawings.

03-01-20

AIR-TO-AIR ENERGY RECOVERY EQUIPMENT

23 72 00-4

1. Defrost System. Factory installed and capable of maintaining at least 85 percent of the non-frosted performance at -29 degrees C (-

20 degrees F).

2. Controls shall be factory installed and integrated with the VRF system controls. Controller shall be BACnet IP and BTL certified.

J. Extended-Surface, Disposable Panel Filters: MERV 8 (exhaust) and 13

(supply) as scheduled, 2-inch throw-away type. Refer to Section 23 40

00 HVAC Air Cleaning Devices.

2.2 AIR FILTERS

Air Filters: Disposable air filters shall be provided standard on all air entering sides of air-to-air heat exchangers and as indicated on the drawings. Comply with requirements in specification Section

23 40 00, HVAC AIR CLEANING DEVICES.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Follow the equipment manufacturer's instructions for handling and installation, and setting up of ductwork for makeup and exhaust air steamers for maximum efficiency.

B. Seal ductwork tightly to avoid air leakage.

D. Install units with adequate spacing and access for cleaning and maintenance of heat recovery unit components as well as filters.

E. Brace heat recovery equipment installed in projects in the Seismic area according to specification Section 13 05 41, SEISMIC RESTRAINT

REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS.

3.2 FIELD QUALITY CONTROL

A. Operational Test: Perform tests as per manufacturer’s written instructions for proper and safe operation of the heat recovery system.

1. After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

2. Adjust seals and purge.

3. Test and adjust controls and safeties.

B. Replace damaged and malfunctioning controls and equipment.

C. Set initial temperature and humidity set points. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

D. Prepare test and inspection reports to the COR in accordance with specification Section 01 00 00, GENERAL REQUIREMENTS.

03-01-20

AIR-TO-AIR ENERGY RECOVERY EQUIPMENT

23 72 00-5

3.3 INSTRUCTIONS

Provide services of manufacturer's technical representative for four hours to instruct VA personnel in operation and maintenance of heat recovery equipment.

3.4 STARTUP AND TESTING

The Commissioning Agent will observe startup and contractor testing of selected equipment. Coordinate the startup and contractor testing schedules with the COR and Commissioning Agent. Provide a minimum of 7 calendar days prior notice.

3.5 COMMISSIONING

A. Provide commissioning documentation in accordance with the requirements of Section 23 08 00 – COMMISSIONING OF HVAC SYSTEMS for all inspection, start up, and contractor testing required above and required by the

System Readiness Checklist provided by the Commissioning Agent.

B. Components provided under this section of the specification will be tested as part of a larger system. Refer to Section 23 08 00 –

COMMISSIONING OF HVAC SYSTEMS and related sections for contractor responsibilities for system commissioning.

3.6 DEMONSTRATION AND TRAINING

A. Provide services of manufacturer’s technical representative for four hours to instruct VA personnel in operation and maintenance of units.

B. Submit training plans and instructor qualifications in accordance with the requirements of Section 23 08 00 – COMMISSIONING OF HVAC SYSTEMS.

- - - E N D - - -