Chiller Specifications.pdf

USP Marion Chiller Specifications

Chiller requirements

Model Number: 30XV-3506M40-6DC2/Or equal item

Chiller 460-3-60•

Variable Speed Compressors & Condenser Fans•

Aluminum Microchannel Condenser Coil•

Low Ambient Cooling to -20F•

BACnet Communication Interface•

Single Point Power with Non-Fused Disconnect•

Short Circuit Current Rating (SCCR) = 65 kAIC•

Compressor Isolation Valves•

Suction Line Insulation•

Coil Trim Panels + Security Grills (Sides) + Hail Guards (End)•

Factory Authorized Start-up (Owner Training Concurrent w/ Start-up)

First Year Entire Unit PARTS & LABOR Warranty• Warranty Ends 12 Months from Startup or 18 Months from Shipment (Whichever Occurs First)

Years Two through Five Compressor PARTS ONLY Warranty• Warranty Ends 60 Months from Startup or 66 Months from Shipment (Whichever Occurs First)

Refrigerant: R-134a

Independent Refrigerant Circuits: 2

Evaporator Information

Fluid Type: Fresh Water

Fouling Factor: 0.000100 (hr-sqft-F)/BTU

Leaving Temperature: 44.00 °F

Entering Temperature: 54.00 °F

Performance Information

Cooling Capacity: 350.2 Tons

Minimum IPLV (EER): 19.3

Electrical Information

Unit Voltage: 460-3-60 V-Ph-Hz

Connection Type: Single Point

Minimum Voltage: 414 Volts

Maximum Voltage: 506 Volts

SCCR: 65 kA

Electrical Electrical

Amps Circuit 1 Circuit 2

MCA 639.9

MOCP 800.0

Rec Fuse Size 800.0

SYSTEM DESCRIPTION

Microprocessor controlled, air-cooled liquid chiller for outdoor installation, utilizing variable speed screw compressors on all models, and utilizing low sound variable speed fans.

QUALITY ASSURANCE

Unit shall be rated in accordance with AHRI (Air-Conditioning, Heating and Refrigeration Institute) Standard 550/590 (U.S.A.) latest edition and all units shall meet requirements of ASHRAE (American Society of Heating, Refrigeration and Air-Conditioning Engineers) Standard 90.1-2016.

Unit construction shall comply with ASHRAE 15 Safety Code, UL (Underwriters Laboratories) 1995, and ASME (American Society of Mechanical Engineers) applicable codes (U.S.A. codes).

The management system governing the manufacture of this product is ISO (International Organization for Standardization) 9001:2015 certified.

An operational test, in which the chiller is run under load, is performed at the factory. This test checks for proper operation of fans as well as various controls and safeties, and a Certificate of Unit Testing, indicating successful end-of-line testing, is provided with the unit.

DELIVERY, STORAGE AND HANDLING

Unit controls shall be capable of with- standing 150°F (65.5°C) storage temperatures in the control compartment.

EQUIPMENT

To avoid extended chiller downtime, when changing chiller sensors and/or instrumentation, no control panel re-programming shall be required.

Factory assembled, single-piece chassis, air-cooled liquid chiller. Contained within the unit cabinet shall be all factory wiring, piping, controls, refrigerant charge (R-134a), and special features required prior to field start-up.

Materials of Construction:

The base rail 7 ga, zinc-dipped galvanized frame

Cabinet shall be galvanized steel casing with a baked enamel powder or pre-painted finish.

Painted parts shall withstand 1000 hours in constant neutral salt spray under ASTM B117 conditions with a 1 mm scribe per ASTM D1654. After test, painted parts shall show no signs of wrinkling or cracking, no loss of adhesion, no evidence of blistering, and the mean creep age shall not exceed 1/4 in.

(Rating 4 per ASTM D1654) on either side of the scribe line.

Fans:

Condenser fans shall be variable speed.

The variable speed drives for the condenser fans shall include a DC link reactor.

Air shall be discharged vertically upward.

All VFDs on the chiller (compressor motors and fans) shall be fully air cooled and shall not require an additional gly-col cooling system, thus avoiding the maintenance associated with such cooling systems.

Fans shall be protected by coated steel wire safety guards or equivalent.

Fan blades shall have serrated edges to minimize the sound that is produced.

Compressor/Compressor Assembly:

Comprised of semi-hermetic twin screw type compressors.

Compressor motor shall be direct drive, VFD (variable frequency drive) controlled to match the load requirement. The motors are protected by motor temperature sensors, and are suction gas cooled.

In order to optimally match building load, maximize chiller power factor and help equalize compressor run time, all chiller compressors must be VFD controlled.

For improved reliability with fewer moving parts, the compressor shall not employ a slide valve.

Capacity control shall utilize a VFD to unload each compressor from 100% to 25% of full load, resulting in a chiller minimum load of less than 15%.

The VFD for each compressor motor shall include a DC link reactor.

Compressor shall include an internal muffler to reduce pulsations in the system.

All VFDs on the chiller (compressor motors and fans) shall be fully air cooled and shall not require an additional gly-col cooling system, thus avoiding the maintenance associated with such cooling systems.

Flooded Evaporator:

Shall be mechanically cleanable tubes in a shell-and-tube type evaporator with removable heads.

Tubes shall be internally enhanced seamless-copper type rolled into tube sheets.

Shall be equipped with Victaulic-type water connections.

Shell and evaporator heads shall be insulated with 3/4-in. PVC foam (closed-cell) with a maximum K factor of 0.28.

Design shall incorporate 2 independent refrigerant circuits.

Evaporator shall be tested and stamped in accordance with ASME Code for a refrigerant working side pressure of 220 psig (1517 kPa). Evaporator shall have a maximum water-side pressure of 300 psig (2068 kPa).

Evaporator shall have an evaporator drain and vent.

Low-ambient temperature protection to 0°F: unit shall have factory-installed evaporator heater to protect evaporator from ambient temperature freeze down to 0°F.

Evaporator shall be provided with a factory-installed flow switch.

Condenser:

Coil shall be air-cooled micro channels . Construction shall consist of aluminum alloys for fins, tubes, and manifolds in combination with a corrosion-resistant coating.

Assembled condenser coils shall be pressure tested at the coil factory at 660 psig and subsequently shall be leak tested at 145 psig ±5 psig and pressure tested at 350 psig at final unit assembly.

To plan the chiller installation and for ease of maintenance/coil removal, all refrigerant piping entering and leaving the condenser coils shall be located on only one side of the chiller so the coils can be removed (when needed) from the side free of piping. This is important to consider because removing the coils from the header side, although possible, involves extra labor due to extra bending and brazing of the coil headers.

Refrigeration Components:

Refrigerant circuit components shall include replaceable-core filter drier, moisture indicating sight glass, electronic expansion valve, discharge service valves and liquid line service valves, and complete operating charge of both refrigerant R-134a and compressor oil.

Controls, Safeties, and Diagnostics:

Unit controls shall include the following minimum components:

Microprocessor with non-volatile memory. Battery backup system shall not be accepted.

Separate terminal block for power and controls.

Separate 115-v power supply to serve all controllers, relays, and control components.

ON/OFF control switch.

Replaceable solid-state controllers.

Pressure sensors installed to measure suction, oil, economizer, discharge, and liquid pressure.

Thermistors in-stalled to measure evaporator entering and leaving fluid temperatures and outside-air temperature.

Unit controls shall include the following functions:

Automatic circuit lead/lag.

Capacity control based on leaving chilled fluid temperature and compensated by rate of change of return-fluid temperature with temperature set point accuracy to 0.1°F.

Limiting the chilled fluid temperature pull-down rate at start-up to an adjustable range of 0.2°F to 2°F per minute to prevent excessive demand spikes at start-up.

Seven-day time schedule.

Leaving chilled fluid temperature reset from return fluid and outside air temperature.

Chilled water pump start/stop control.

Chiller control for parallel chiller applications without addition of hardware modules and control panels (requires thermistors).

Timed maintenance scheduling to signal maintenance activities for strainer maintenance and user-defined maintenance activities.

Low ambient protection to energize evaporator heaters.

Single step demand limit control activated by remote contact closure.

Diagnostics:

The control panel shall include, as standard, a display:

color touch screen display

Display shall allow a user to navigate through menus, select desired options and modify data.

Features of the display shall include:

Multiple connection ports for USB, Ethernet or BACnet IP, LEN (local equipment network).

Automatic reporting of alarms over email.

Ability to graphically plot trends of system performance and conditions over time.

Graphical summary display of current chiller operation and water conditions.

Display shall allow access to configuration, maintenance, service, set point, time schedules, alarm history, and status data.

Three levels of password protection against unauthorized access to configuration and maintenance information, and display set up parameters.

Display shall be capable of displaying the last 50 alarms with clear full text description and time and date stamp, and will store a snapshot of operating conditions before and after the 10 most recent alarms.

Display run hours and number of starts for machine and individual compressors.

Display current draw for each circuit compressor and fans.

The control system shall allow software upgrade without the need for new hardware modules.

Safeties:

Unit shall be equipped with thermistors and all necessary components in conjunction with the control system to provide the unit with the following protections:

Reverse rotation.

Low chilled fluid temperature.

Motor over temperature.

High pressure.

Electrical overload.

Loss of phase.

Loss of chilled water flow.

Condenser-fan motors shall have internal overcurrent protection.

Operating Characteristics:

Unit, without modification, shall be capable of running at outdoor ambient temperatures from -20°F to 131°F.

Unit shall be capable of starting up with 95°F entering fluid temperature to the evaporator.

Motors:

Condenser-fan motors shall be totally enclosed, air over, variable speed, 3-phase type with permanently lubricated bearings and Class F insulation. Fans shall be 6-pole.

Electrical Requirements:

Unit primary electrical power supply shall enter the unit at a single location.

Primary electrical power supply shall be rated to operate up to 125.6°F ambient temperature.

Unit shall operate on 3-phase power at the voltage shown in the equipment schedule.

Control points shall be accessed through terminal block.

Unit shall be shipped with factory control and power wiring installed.

Unit shall have SCCR (short circuit current rating) value of 65 kA.

Chilled Water Circuit:

Chilled water circuit shall be rated for 300 psig.

Thermal dispersion proof of flow switch shall be factory installed and wired.

Required Additional Options:

Variable Speed Condenser Fans:

All fans on the unit shall have variable speed fan motors to provide higher part load efficiency and reduced acoustic levels. Each fan circuit shall have a factory-installed, independent variable speed drive with display. Variable speed drives are rated IP-55 enclosures and UL Listed. The use of this option, with the addition of antifreeze in the evaporator circuit and wind baffles, shall allow running with outdoor ambient temperatures down to –20°F (–29°C). Variable speed condenser fans also allow the chiller to operate at ambient temperatures as high as 125.6°F (52°C).

Unit-Mounted Non-Fused Disconnect:

Unit shall be supplied with factory-installed, lockable, non-fused electrical disconnect for main power supply.

Isolation Valve Option:

Unit shall be supplied with factory-installed isolation valve which provides a means of isolating the compressors from the evaporator vessel, which is beneficial in servicing the chiller. A liquid line service valve and a motorized discharge isolation valve are always provided per refrigerant circuit. The selection of the isolation valve option results in chillers which are equipped with a liquid line service valve, a discharge service valve, and a series of valves on or near the evaporator. The net effect is to provide isolation capability in the condenser area, the evaporator area and the compressor area.

Suction Line Insulation:

Unit shall be supplied with suction line insulation. Insulation shall be tubular closed-cell insulation.

Control Transformer:

Unit shall be supplied with a factory-installed transformer that will allow supply control circuit power from the main unit power supply.

Security Grilles and Hail Guard:

Unit shall be equipped with a factory-installed option consisting of louvered panels to protect/cover any exposed surface of condenser coils from damage. Unit shall be equipped with security grilles along the bottom of the ma-chine to prevent any access by any unauthorized individuals or animals to the compressor, refrigeration and electrical components.

Warranties:

Unit shall be provided with factory start up by a certified manufacturer’s technician. Warranties shall be as follows:

First year parts and labor warranty covering the entire unit. Warranty shall commence 12 months from startup or 18 months from shipment, whichever occurs first.

Five-year compressor parts only warranty. Warranty shall commence 60 months from startup or 66 months from shipment, whichever occurs first.

Footprint:

Chiller must fit on existing chiller’s concrete pad. Dimensions of existing pad are 432”L x 90”W.

Manufacturers who require a larger pad will be responsible for all charges necessary to pour any extra pad and must include this in their pricing.