Memorial Hermann Best Practices

July, 2013

SECTION 23 63 13 AIR COOLED CONDENSING UNITS

PART 1 - GENERAL

1.01 WORK INCLUDED

A. Provide condensing units as scheduled on drawings and as specified herein.

1.02 RELATED WORK

A. Section 23 05 48: Vibration Isolation

B. Section 23 07 00: HVAC Insulation

C. Section 23 23 00: Refrigerant Piping System

1.03 SUBMITTALS

A. Submit product data to Architect for approval.

PART 2 - PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS

A. Carrier

B. Trane

C. York

2.02 EQUIPMENT

A. Safety controls: High and low pressure stats, compressor thermal cutouts, short cycling prevention timer, and 115 volt transformer for control circuit.

B. Warrant motor and compressors against failure for a period of five years after start up.

C. Units 20 tons and larger: Include oil safety pressure switches.

D. Wire units with multiple compressors to stop-start the compressors in sequence, to prevent all starting at once. Units shall be fully automatic, factory prewired including motor starters, ready for operation.

E. Units shall be weather proofed for outdoor installation.

2.03 UNITS FIVE TONS AND SMALLER

A. Units shall be air-cooled condensing units complete with welded hermetic reciprocating compressor thermal and current cutouts.

B. Unit shall include an air cooled condenser section, complete with condensing head pressure control, winter start control, and other controls necessary for satisfactory operation at the outside temperature specified.

C. Motor-compressors shall be warranted against failure for a period of five years after start up.

2.04 UNITS FIVE TONS AND ABOVE

A. Air-cooled condensing units complete with serviceable hermetic reciprocating compressor, air-cooled condenser, with condensing head pressure control, winter start controls, and other controls necessary for satisfactory operation at the outside temperatures specified.

PART 3 - EXECUTION

3.01 INSTALLATION

A. Install condensing units as detailed on drawings and in accordance with manufacturer's instructions.

B. Demonstrate to and instruct operating personnel in the operation and maintenance of the system.

C. Start-up and test unit for proper operation.

D. Install refrigerant piping as detailed on drawings and in accordance with manufacturer's recommendations.

END OF SECTION

AIR COOLED CONDENSING UNITS

23 63 13 - Page 1