[SUBMITTAL INFORMATION]

DESIGN A/E NOTE - GUIDE SPECIFICATION CONVENTIONS

Color-highlighted text

Yellow: Editor’s Notes. Comments inserted into the text are addressed to the A/E, not the Contractor. Editor’s Notes are formatted as hidden text. Editor’s Notes are not identified with an update. Do not print Editor’s Notes in issue for distribution to Bidders/Contractors.

Tip:To not print Editor’s Notes (hidden text) in document choose Tools on Menu bar, click Options, Print tab, under Include with document, uncheck Hidden text (check to print text), click OK. Save.

Tip:To view Editor’s Notes (hidden text) in a document choose Tools on Menu bar, click Options, View tab, under Formatting marks, check Hidden text (uncheck to hide text), click OK. Save.

Red: Text updated in 1st quarter. April – June.

Strikethrough text and highlighting (not text) in previously issued quarters are deleted. Only 1st quarter highlighted updated text is indicated.

Turquoise: Text updated in 2nd quarter. July – September.

1st quarter updated text remains highlighted.

Pink: Text updated in 3rd quarter. October – December.

1st and 2nd quarter updated text remain highlighted.

Bright Green: Text updated in 4th quarter. January – March.

1st, 2nd and 3rd quarter updated text remains highlighted.

Text Editing

Select options [in brackets] and edit <notes> before issuing specifications for distribution to Bidders/Contractors.

Delete Strikethrough text.

Tip:To delete strikethrough text, choose Edit on Menu bar, click Find, Find tab, More (Search Options opens), select All, click Format, Font, check Strikethrough, OK.

Click Replace tab, Replace All, OK, Close. Save.

Delete all highlighting of text from issue to be distributed to Bidders/Contractors.

Tip:To delete highlighting, locate cursor at beginning of Section and block all text in Section, press Shift + Control + End, click No Highlight icon on Formatting toolbar. Save.

IMPORTANT: Retain month and year under section title on first page indicating updated Guide Specification Section issue used.

Note: This page will not print when Hidden text is unchecked as indicated in Editor’s Notes Tip.

IF THE HIDDEN GUIDE SPECIFICATION CONVENTIONS DO NOT APPEAR PRECEEDING THIS

NOTE, TURN THEM ON AS FOLLOWS.

FOR MICROSOFT WORD 2000 and 2003, CLICK ON SHOW/HIDE ICON IN MENU BAR OR CHOOSE

TOOLS IN MENU BAR. THEN CLICK OPTIONS, VIEW TAB, UNDER FORMATTING MARKS, CHECK

HIDDEN TEXT.

FOR MICROSOFT WORD 2007, CLICK ON MICROSOFT OFFICE ICON LOCATED IN UPPER LEFT

CORNER OF MENU BAR. CLICK ON WORD OPTIONS AT BOTTOM OF DROP DOWN. THEN CLICK

ON DISPLAY. CHECK THE HIDDEN TEXT BOX.

FOR MICROSOFT OFFICE 2010, CLICK ON FILE BUTTON LOCATED IN UPPER LEFT CORNER OF

MENU BAR. IN THE DROP DOWN, CLICK ON OPTIONS, AND A WORD OPTIONS BOX WILL

APPEAR. CLICK ON DISPLAY. CHECK THE HIDDEN TEXT BOX.

THE GUIDE SPECIFICATION CONVENTIONS SHOULD NOW BE VISIBLE IN THE DOCUMENT.

(Delete this note before printing.)

SECTION 236213

AIR COOLED [CONDENSING UNITS] [HEAT PUMPS]

(Edited from DeCA June 2018 Design Criteria)

PART 1 - GENERAL

1.1SUMMARY

  1. Section Includes:
  2. Condensing unit package.
  3. Charge of refrigerant and oil.
  4. Controls and control connections.
  5. Refrigerant piping connections.
  6. Motor starters.
  7. Related Sections:
  8. Division 01 Section Mechanical, Refrigeration, Food Service Equipment and Electrical Coordination.
  9. Division 01 Section Quality Control.
  10. Division 01 Section Closeout Procedures.
  11. Division 23 Section Common Motor Requirements for HVAC Equipment.
  12. Division 23 Section Refrigerant Piping.
  13. Division 23 Section Convection Heating and Cooling Units: Fan-coil units.
  14. Division 23 Section Instrumentation and Control Devices for HVAC.
  15. Division 26 Electrical.

1.2QUALITY CONTROL

  1. The following publications form a part of this specification to the extent they are applicable:
  2. ARI 210/240 - Unitary Air-Conditioning and Air-Source Heat Pump Equipment.
  3. ASHRAE 14 - Methods of Testing for Rating Positive Displacement Condensing Units.
  4. ASHRAE 15 - Safety Code for Mechanical Refrigeration.
  5. NEMA MG 1 - Motors and Generators.
  6. UL 207 - Refrigerant-Containing Components and Accessories, Non-Electrical.

1.3SUBMITTALS

  1. Submittals for Review:
  2. Division 01 Section Quality Control: Procedures for Submittals.
  3. Shop Drawings: Indicate components, assembly, dimensions, weights and loadings, required clearances, and location and size of field connections. Include schematic layouts showing condensing units, cooling coils, refrigerant piping, and accessories required for complete system.
  4. Product Data: Provide rated capacities, weights specialties and accessories, electrical nameplate data, and wiring diagrams. Make submission with fan-coil units, refer to Division 23 Section Convection Heating and Cooling Units to ensure capacities are complementary.
  5. Operation and Maintenance data.
  6. Submittals For Information:
  7. Division 01 Section Administrative Requirements: Procedures for submittals.
  8. Design Data: Provide a piping schematic. Indicate pipe and equipment sizing.
  9. Submit manufacturer's installation instructions.
  10. LEED Submittal:

Retain subparagraph below for LEED-NCCreditEA4; coordinate with requirements selected in Part2 for refrigerants.

  1. Product Data for CreditEA4: Documentation required by CreditEA4 indicating that equipment and refrigerants comply.

1.4DELIVERY, STORAGE, AND PROTECTION

  1. Comply with manufacturer's installation instructions for rigging, unloading, and transporting units.
  2. Protect units on site from physical damage. Protect coils.

1.5REGULATORY REQUIREMENTS

  1. Products Requiring Electrical Connection: Listed and classified by Underwriters Laboratories Inc. as suitable for the purpose specified and indicated.

PART 2 - PRODUCTS

2.1REFRIGERANT

  1. Refrigerant shall be R410A.

2.2EFFICIENCY

  1. Equipment shall meet or exceed the minimum efficiency requirements set forth in the International Energy Conservation Code, edition adopted by authority having jurisdiction.

2.3MANUFACTURED UNITS

  1. Units: Self-contained, packaged, factory assembled and pre-wired units suitable for outdoor use consisting of cabinet, compressors, condensing coil and fans, integral sub-cooling coil, controls, liquid receiver, and screen guards.
  2. Construction and Ratings: In accordance with ARI 210/240 and UL 207 and UL 303. Testing shall be in accordance with ASHRAE 14.
  3. Performance Ratings: Energy Efficiency Rating (EER) and Coefficient of Performance (COP) not less than prescribed by ASHRAE 90A.

2.4CASING

  1. House components in welded steel frame with galvanized steel panels with weather resistant, baked enamel finish.
  2. Mount starters, disconnects, and controls in weatherproof panel provided with full opening access doors. Provide mechanical interlock to disconnect power when door is opened.
  3. Provide removable access doors or panels with quick fasteners.

2.5OUTDOOR COILS

***Copper fins within 30 miles of sea coast***

  1. Coils: Aluminum fins [copper fins] mechanically bonded to seamless copper tubing with corrosion resistant polyethylene coating and coastal filter. Provide sub-cooling circuits. Air test under water to 425 psig, and vacuum dehydrate. Seal with holding charge of refrigerant.
  2. Coil Guard: Expanded metal, Louvered, or PVC coat steel wire for hail damage prevention.

2.6FANS AND MOTORS

  1. Vertical discharge direct belt driven propeller type condenser fans with fan guard on discharge. Equip with roller or ball bearings with grease fittings extended to outside of casing.
  2. Weatherproof motors suitable for outdoor use, single phase permanent split capacitor or 3 phase, with permanent lubricated ball bearings and built in thermal overload protection.

2.7COMPRESSORS

  1. Compressor: Hermetic or semihermetic or scroll, or reciprocating.
  2. Mounting: Statically and dynamically balance rotating parts and mount on vibration isolators.
  3. Motor: Suction gas cooled with winding over temperature protection.
  4. Crankcase Heater: Evaporates refrigerant returning to crankcase during shut down. Energize heater when compressor is not operating.

2.8REFRIGERANT CIRCUIT

  1. Provide each unit with one refrigerant circuit, factory supplied and piped. Refer to Division 23 Section Refrigerant Piping.
  2. For each refrigerant circuit, provide:
  3. Filter dryer.
  4. Thermal expansion device.
  5. Insulated suction line.
  6. Suction and liquid line service valves and gage ports.
  7. Charging valve.
  8. Compressor discharge service valve.
  9. Condenser pressure relief device.
  10. Moisture and liquid indicator.

2.9CONTROLS

  1. On unit, mount weatherproof steel control panel, NEMA 250, containing power and control wiring, factory wired with single point power connection.
  2. Provide compressor starter, control power transformer or terminal for controls power, and condenser fan starter relay.
  3. Provide safety controls arranged so any one will shut down machine:
  4. High discharge pressure switch.
  5. Low suction pressure switch.
  6. Low oil pressure cutout switch.
  7. Phase loss, Phase reversal, low voltage and voltage spike protection, factory or field installed on three phase units. (SymCom Inc., Motor Saver).
  8. Timer to prevent excessive compressor cycling.

***Remove section below if ambient operation below 30 deg F is required. ***

  1. Provide one of the following controls to permit operation down to 30 deg F ambient temperature:
  2. Head pressure switch to cycle fan motors in response to refrigerant condensing pressure.
  3. Solid state control to vary speed of one condenser fan motor in response to refrigerant condensing pressure.
  4. Electronic control consisting of mixing damper assembly, controlled to maintain constant refrigerant condensing pressure.

***Remove section below if ambient operation below 30 deg F is NOT required. ***

  1. Provide one of the following controls to permit operation below 30 deg F ambient temperature.
  2. Low Ambient Controller: Cycles condenser fan to permit operation down to 0 deg F[with time-delay relay to bypass low-pressure switch].
  3. Low Ambient Controller: Controls condenser fan speed to permit operation down to minus 20 deg F[with time-delay relay to bypass low-pressure switch].
  4. For heat pump units, provide reversing valve, suction line accumulator, [discharge muffler,] flow control check valve, and solid-state defrost control utilizing thermistors.

PART 3 - EXECUTION

3.1INSTALLATION

  1. Install units level and plumb, firmly anchored in locations indicated; maintain manufacturer's recommended clearances.

Retain ONE OF two paragraphs Below OR BOTH IF APPLICABLE.

  1. Install ground-mounted condensing units on a minimum 4 inch thick concrete base.
  2. Install roof-mounting units on equipment supports as required.

Retain one of first two paragraphs below OR BOTH IF APPLICABLE.

  1. Vibration Isolation: Mount ground-mounted condensing units on rubber pads with a minimum deflection of 1/4 inch.
  2. Vibration Isolation: Mount ground-mounted condensing units on restrained spring isolators with a minimum deflection of 1 inch. Anchor units to supports.
  3. Maintain manufacturer's recommended clearances for service and maintenance.
  4. Loose Components: Install electrical components, devices, and accessories that are not factory mounted.
  5. Install in accordance with manufacturer's installation instructions.
  6. Complete structural, mechanical, and electrical connections in accordance with manufacturer's installation instructions.
  7. Provide connection to refrigeration piping system and evaporators. Refer to Division 23 Section Refrigerant Piping. Comply with ASHRAE 15.
  8. Furnish charge of refrigerant and oil.
  9. Charge system with refrigerant and test entire system for leaks after completion of installation. Repair leaks, put system into operation, and test equipment performance.
  10. Securely fasten condensing units to housekeeping pads on roof mounting rails to withstand wind and seismic loading specified in Division 01 Section Summary of Work.
  11. Start unit according to manufacturer's written instructions.

END OF SECTION

<Insert project name and location>

<Insert Submittal Date>

AIR COOLED [CONDENSING UNITS] [HEAT PUMPS]

236213 - 1