HomeMy WebLinkAbout15530.pdf BICKFORD OF CARMEL, IN 12/12/2012
REFRIGERANT PIPING 15530-1
SECTION 15530
REFRIGERANT PIPING
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUBMITTALS
A. Shop Drawings showing layout of refrigerant piping, specialties, and fittings including, but
not necessarily limited to, pipe and tube sizes, valve arrangements and locations, slopes
of horizontal runs, wall and floor penetrations, and equipment connection details. Show
interface and spatial relationship between piping and proximity to equipment.
1.3 QUALITY ASSURANCE
A. Regulatory Requirements: Comply with provisions of the following codes:
1. ANSI B31.5: ASME Code for Pressure Piping - Refrigerant Piping.
PART 2 - PRODUCTS
2.1 MANUFACTURERS
A. Available Manufacturers: Subject to compliance with requirements, manufacturers
offering products which may be incorporated in the Work include, but are not limited to,
the following:
B. Refrigerant Valves and Specialties:
Henry Valve Company
Sporlan Valve Company
2.2 PIPE AND TUBING MATERIALS
A. Copper Tubing: ASTM B 280, Type ACR, hard-drawn straight lengths, and soft-annealed
coils, seamless copper tubing. Tubing shall be factory cleaned, ready for installation, and
have ends capped to protect cleanliness of pipe interiors prior to shipping.
B. Copper Tubing: ASTM B 88, Type L, hard-drawn straight lengths, seamless copper
tubing.
2.3 FITTINGS
A. Wrought-Copper Fittings: ANSI B16.22, streamlined pattern.
2.4 JOINING MATERIALS
A. Brazing Filler Metals: AWS A5.8, Classification BAg-1 (Silver).
2.5 PIPE INSULATION
A. Expanded flexible unicellar piping insulation; ASTM C534 Type I.
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2.6 VALVES
A. Thermal Expansion Valves: Thermostatic adjustable, modulating type; size as required
for specific evaporator requirements, and factory set for proper evaporator superheat
requirements. Valves shall have copper fittings for solder end connections; complete
with sensing bulb.
2.7 REFRIGERANT PIPING SPECIALTIES
A. General: Complete refrigerant piping specialty assembly shall be UL-listed and designed
to conform to ARI 760.
B. Moisture/liquid Indicators: 500 psig maximum operation pressure, 200 deg. F maximum
operating temperature; forged brass body, with replaceable polished optical viewing
window, and solder end connections.
C. Suction Line Filter-Drier: 350 psig maximum operation pressure, 225 deg. F maximum
operating temperature; steel shell, and wrought copper fittings for solder end
connections. Permanent filter element shall be molded felt core surrounded by a
desiccant. for removal of acids and moisture for refrigerant vapor.
PART 3 - EXECUTION
3.1 PIPE APPLICATIONS
A. Use Type L, or Type ACR drawn copper tubing with wrought copper fittings and brazed
joints above ground, within building. Mechanical fittings (crimp or flair) are not permitted.
B. If other than Type ACR tubing is used, clean and protect inside of tubing as specified in
Article "CLEANING" below.
3.2 PIPING INSTALLATIONS
A. General: Install refrigerant piping in accordance with ASHRAE Standard 15 - "The Safety
Code for Mechanical Refrigeration."
B. Install piping in as short and direct arrangement as possible to minimize pressure drop.
C. Use fittings for all changes in direction and all branch connections.
D. Install exposed piping at right angles or parallel to building walls. Diagonal runs are not
permitted, unless expressly indicated.
E. Install piping free of sags or bends and with ample space between piping to permit proper
insulation applications.
F. Conceal all pipe installations in walls, pipe chases, utility spaces, above ceilings, below
grade or floors, unless indicated to be exposed to view.
G. Install insulation as required. See Section 15250 – Mechanical Insulation.
3.3 HANGERS AND SUPPORTS
A. General: Hanger, supports, and anchors are specified in Division 15 - Section 15140
"Supports and Anchors." Conform to the table below for maximum spacing of supports:
BICKFORD OF CARMEL, IN 12/12/2012
REFRIGERANT PIPING 15530-3
B. Install hangers with the following minimum rod sizes and maximum spacing:
NON. PIPE SIZE MAX. SPAN-FT MIN. ROD SIZE - INCHES
1 7 3/8
1-1/2 9 3/8
3.4 PIPE JOINT CONSTRUCTION
A. Brazed Joints: Comply with the procedures contained in the AWS "Brazing Manual."
B. Fill the pipe and fittings during brazing, with an inert gas (ie., nitrogen or carbon dioxide)
to prevent formation of scale.
C. Heat joints using oxy-acetylene torch. Heat to proper and uniform brazing temperature.
3.5 VALVE INSTALLATIONS
A. General: Install refrigerant valves in accordance with manufacturer's instructions.
3.6 REFRIGERANT
A. Provide all necessary refrigerant of type required and needed in each system. Provide a
nameplate tag at charging point that indicates the refrigerant required in the system.
3.7 CLEANING
A. Before installation of copper tubing other than Type ACR tubing, clean the tubing and
fitting using following cleaning procedure:
B. Remove coarse particles of dirt and dust by drawing a clean, lintless cloth through the
tubing by means of a wire or an electrician's tape.
C. Draw a clean, lintless cloth saturated with trichloroethylene through the tube or pipe.
Continue this procedure until cloth is not discolored by dirt.
D. Draw a clean, lintless cloth, saturated with compressor oil, squeezed dry, through the
tube or pipe to remove remaining lint. Inspect tube or pipe visually for remaining dirt and
lint.
E. Finally, draw a clean, dry, lintless cloth through the tube or pipe.
3.8 ADJUSTING AND CLEANING
A. Verify actual evaporator applications and operating conditions, and adjust thermostatic
expansion valve to obtain proper evaporator superheat requirements.
B. Clean and inspect refrigerant piping systems in accordance with requirements of
Division-15 Basic Mechanical Materials and Methods section "Pipes and Pipe Fittings".
C. Adjust controls and safeties. Replace damaged or malfunctioning controls and
equipment with new materials and products.
END OF SECTION