SECTION 15658

RECIPROCATING REFRIGERANT COMPRESSORS

PART 1 GENERAL

SECTION INCLUDES

Reciprocating compressor units.

Internal piping and accessories.

Controls and control panel.

Motor starters.

Electrical power connections.

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section 15242 - Vibration Isolation: Placement of vibration isolators.

RELATED SECTIONS

Section 03300 - Cast-in-Place Concrete: Housekeeping bases.

Section 15170 - Motors.

Section 15242 - Vibration Isolation.

Section 15535 - Refrigeration Piping and Specialties.

Section 15742 - Air-Cooled Refrigerant Condensers.

Section 15790 - Air Coils.

Section 15952 - Controls and Instrumentation.

Section 16180 - Equipment Wiring Systems.

REFERENCES

ANSI/ASHRAE 15 - Safety Code for Mechanical Refrigeration.

ANSI/ASHRAE 90A - Energy Conservation in New Building Design.

ANSI/UL 207 - Refrigerant-Containing Components and Accessories, Non-electrical.

ANSI/UL 303 - Refrigeration and Air-Conditioning Condensing and Compressor Units.

ARI 520 - Positive Displacement Refrigerant Compressors,

Compressor Units, and Condensing Units.

ASHRAE 23 - Methods of Testing for Rating Positive Displacement Refrigerant Compressors.

ASME B19.3 - Safety Standard for Compressors for Process Industries.

SUBMITTALS

Submit shop drawings under provisions of Section [01300.] [01340.]

Submit shop drawings indicating components, assembly, dimensions, weights and loadings, required clearances, and location and size of field connections. Indicate accessories where required for complete system.

Submit product data under provisions of Section [01300.] [01340.]

Submit product data indicating rated capacities, weights, accessories, electrical nameplate data and wiring diagrams.

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

OPERATION AND MAINTENANCE DATA

Submit operation and maintenance data under provisions of Section [01700.] [01730.]

Include start-up instructions, maintenance instructions, parts lists, controls, and accessories.

WARRANTY

Provide [five] [_____] year warranty under provisions of Section [01700.] [01740.]

Warranty: Include coverage for [total package.] [compressor.] [motor.]

EXTRA MATERIALS

Provide [one] [_____] complete change of lubricating oil under provisions of Section [01700.] [01750.]

PART 2 PRODUCTS

MANUFACTURERS

[______________________________] Product [__________.]

[______________________________] Product [__________.]

[______________________________] Product [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

MANUFACTURED UNITS

Compressor Units: [Hermetic] [Semi-hermetic (serviceable hermetic)] [Open] compressor and motor, with [cylinder unloaders,] crankcase heater, suction and discharge service valves, vibration isolators, and control panel.

Construction and Ratings: In accordance with ARI 520[,][.] [and ANSI/UL 207 and ANSI/UL 303.] Testing shall be in accordance with ASHRAE 14.

Performance Ratings: Energy Efficiency Rating (EER) [and Coefficient of Performance (COP)] not less than prescribed by ANSI/ASHRAE 90A.

Performance: Producing a refrigeration effect of [_____] tons ([_____] W) with refrigerant at a saturated suction temperature of [_____] degrees F ([_____] degrees C), a saturated discharge temperature of [_____] degrees F ([_____] degrees C), and [_____] kW input, with [_____] steps unloading.

HERMETIC COMPRESSORS

Compressors: Statically and dynamically balanced crankshaft, spring loaded discharge valves, internal pressure relief valve, suction service valve, discharge muffler. Install in welded steel shell, with integral suction accumulator, internally mounted on spring vibration isolators.

Lubrication System: Oil charging valve[,] [oil level sight glass, oil filter, and magnetic plug or strainer,] arranged to ensure adequate lubrication during starting, stopping, and normal operation.

Capacity Reduction Equipment: Electrically actuated suction valve unloaders with replaceable solenoid valves, starting compressor unloaded.

Motor: [Constant speed] [Two speed] [1800] [3600] [3600/1800] rpm, suction gas cooled[,] [with two winding thermostats providing overheating protection,] designed for across-the-line starting, with starter.

Crankcase Heater: To evaporate refrigerant returning to crankcase during shut down, energize [continuously.] [when compressor is not operating.]

SEMI-HERMETIC (SERVICEABLE HERMETIC) COMPRESSORS

Construction: Statically and dynamically balanced, forged steel or cast iron crankshafts, aluminum or steel connecting rods, automotive type cast iron or aluminum pistons, floating piston rings, ring type suction and discharge valves, removable discharge heads, [spring loaded heads and replaceable cylinder liners,] mesh suction inlet screen, and discharge service valves.

Lubrication System: Reversible, positive displacement, oil pump with oil charging valve, oil level sight glass, oil filter, and magnetic plug or strainer.

Capacity Reduction Equipment: Suction valve unloaders, with lifting mechanism operated by [oil pressure.] [gas discharge pressure.] [solenoid valve.] Provide for unloaded compressor start.

Motor: Constant speed 1800 rpm, suction gas cooled with electronic winding over temperature protection, designed for across-the-line starting. [Refer to Section 15170.] Furnish with starter.

Crankcase Heater: Evaporates refrigerant returning to crankcase during shut down. Energize heater [continuously.] [when compressor is not operating.]

OPEN COMPRESSORS

Construction: Cast iron housing, statically and dynamically balanced forged steel or cast iron crankshafts, aluminum or steel connecting rods, automotive type cast iron or aluminum pistons, floating piston rings, ring type suction and discharge valves, spring loaded cast iron cylinder heads, fine mesh suction screen, suction discharge service valves, internal spring loaded relief bypass valve, steel backed with babbitt insert sleeve type main bearings. Provide [discharge muffler,] [water cooled oil cooler,] [and] [water cooled cylinder heads.]

Lubrication System: Reversible, positive displacement, oil pump with oil charging valve, oil level sight glass, oil filter, and magnetic plug or strainer.

Capacity Reduction Equipment: Suction valve unloaders, electrically actuated from suction pressure[.] [and external signal.] Provide for unloaded compressor start.

Motor: Directly coupled, constant speed 1800 rpm. Refer to Section 15170. Provide [across-the-line] [part winding] [_______________] starter.

Crankcase Heater: Evaporates refrigerant returning to crankcase during shut down. Energize heater [continuously.] [when compressor is not operating.]

CONTROLS

On compressor, mount steel control panel, containing power and control wiring, [disconnect switch,] factory wired with single point power connection.

Provide [across-the-line] [part winding] [__________] starter, non-recycling compressor overload, starter relay, control power transformer or terminal for controls power[,][.] [and terminal strip for connection to interface equipment.] Provide manual reset current overload protection.

Provide the following devices on control panel face:

Compressor run light.

Start-stop switch.

Control power fuse or circuit breaker.

Demand limit switch.

Elapsed time meter.

Crankcase heater start-stop switch and light.

Provide high discharge pressure switch, low suction pressure switch, and oil pressure switch safety controls [with pilot lights] arranged so that operating any one will shut down machine and require manual reset.

Provide the following operating controls:

Multi-step suction pressure controller which activates cylinder unloaders.

Timer prevents compressor from short cycling.

Part winding start timer.

Periodic pump-out timer to pump down on high suction refrigerant pressure.

Provide pre-piped gage board with pressure gages for suction and discharge refrigerant pressures, and oil pressure.

PART 3 EXECUTION

INSTALLATION

Install in accordance with manufacturer's instructions.

Provide for connection to electrical service. Refer to Section 16180.

Align compressor package on steel or concrete foundations. [Refer to Section 03300.]

Install units on [rubber-in-shear] vibration isolation. [Refer to Section 15252.]

Provide connection to refrigerant piping. Refer to Section 15535.

Arrange piping for easy dismantling to permit tube cleaning.

MANUFACTURER'S FIELD SERVICES

Prepare start systems under provisions of Section [01600.] [01650.]

Supply service of factory trained representative for a period of [_____] days to supervise testing, dehydration and charging of machine, start-up, and instruction on operation and maintenance to Owner.

Supply initial charge of refrigerant and oil.

SCHEDULE

Drawing_Code	COM-1 COM-2	COM-3

Location

Manufacturer

Model Number

Refrigeration Effect

Refrigerant

Saturated Suction Temp.

Saturated Discharge Temp.

Steps Unloading

RPM

Starter Type

Motor

END OF SECTION