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Summary of Contents for McQuay ALR 110
- Page 1 Installation, Operation and Maintenance Manual IOMM ALR-3 Group: Chiller Part Number: 330145710 Effective: September 2001 Supersedes: IM ALR-2 Packaged Air-Cooled Water Chiller ALR 110F - ALR 150F Refrigerant R-22, 60 Hertz...
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Page 2: Table Of Contents
"McQuay" is a registered trademark of McQuay International © 2001 McQuay International "Illustrations and data cover the McQuay International products at the time of publication and we reserve the right to make changes in design and construction at anytime without notice". ALR 110F through 150F... -
Page 3: Introduction
Check all items carefully against the bill of lading. Inspect all units for damage upon arrival. Report shipping damage and file a claim with the carrier. Check the unit nameplate before unloading, making certain it agrees with the power supply available. McQuay is not responsible for physical damage after unit leaves the factory. -
Page 4: Handling
Handling Be careful to avoid rough handling of the unit. Do not push or pull the unit from anything other than the base. Block the pushing vehicle away from the unit to prevent damage to the sheet metal cabinet and end frame. To lift the unit, 2 1/2"... -
Page 5: Installation And Application
Installation and Application Location Unit Placement ALR units are for outdoor applications and can be mounted on a roof or ground level. Set units on a solid and level foundation. For roof mounted applications, install the unit on a steel channel or I- beam frame to support the unit above the roof. -
Page 6: Sound Isolation
Figure 3, Clearance Requirements Notes: Minimum side clearance between two units is 12 feet. Unit must not be installed in a pit or enclosure that is deeper or taller than the height of the unit unless extra clearance is provided per note 4. Minimum clearance on each side is 8 feet when installed in a pit no deeper than the unit height. -
Page 7: Vibration Isolators
Vibration isolators are recommended for all roof mounted installations or wherever vibration transmission is a consideration. Figure 4, Spring Flex Isolators Lifting and Mounting Weights Figure 5, ALR 110-150 Lifting and Mounting Locations 36 (914) 102 (2591) 192 (4877) 83.4... -
Page 8: Water Piping
Water Piping Local authorities can supply the installer with the proper building and safety codes required for safe and proper installation. Install piping with minimum bends and changes in elevation to minimize pressure drop. Consider the following when installing water piping: Vibration eliminators to reduce vibration and noise transmission to the building. -
Page 9: Flow Switch
Mount a water flow switch in either the entering or leaving water line to shut down the unit when water flow is interrupted. A flow switch is available from McQuay (part number 017503300). It is a “paddle” type switch and adaptable to any pipe size from 3” (76mm) to 8” (203mm) nominal. Certain minimum flow rates are required to close the switch and are listed in Table 1. -
Page 10: Refrigerant Charge
Refrigerant Charge All units designed for use with HCFC-22 are shipped with an operating charge (remote evaporator applications are shipped with a unit operating charge and can require additional charge for field piping). The operating charge (using HCFC-22) for each unit is shown in the Physical Data tables beginning on page 13. -
Page 11: Evaporator Water Flow And Pressure Drop
Variable water flow involves changing the water flow through the evaporator as the load changes. McQuay chillers are designed for this duty provided that the rate of change in water flow is slow and the minimum and maximum flow rates for the vessel are not exceeded. - Page 12 Figure 8, Evaporator Water Pressure Drops ALR 110 ALR 145 - 150 ALR 120 - 140 Table 5, Minimum/Maximum Flow Rates ALR Unit Minimum Flow Pressure Drop Maximum Flow Pressure Drop Size gpm (l/s) ft. (kPa) gpm (l/s) ft. (kPa) 165 (10.4)
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Page 13: Physical Data
Physical Data Table 6, Physical Data ALR 110F through 135F ALR MODEL NUMBER PHYSICAL DATA 110F 120F 130F 135F BASIC DATA Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Unit Capacity @ ARI Conditions, Tons (kW) (1) 110.9 (388.1) 122.2 (427.7) 129.6 (453.6) 133.7 (468.0) Number Of Refrigerant Circuits... - Page 14 Table 7, Physical Data ALR 140F through 150F ALR MODEL PHYSICAL DATA 140F 145F 150F BASIC DATA Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Unit Capacity @ ARI Conditions (1), Tons (kW) 139.7 (489.0) 143.2 (501.2) 149.5 (523.3) Number Of Refrigerant Circuits Unit Operating Charge, R-22, lbs.
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Page 15: Electrical Data
Electrical Data Field Wiring CAUTION Internal power wiring to the compressors for single and multiple point option are different. Field wiring must be installed according to unit wiring diagram. Wiring must comply with all applicable codes and ordinances. Warranty is void if wiring is not in accordance with specifications. - Page 16 Table 9, ALR 110F – 150F Electrical Data, Multiple Point Power Supply Field Power Supply Field Power Supply Field Min. Min. Min. Fans and Controls Fusing(1) Circuit #1 Fusing (1) Circuit #2 Fusing (1) Ckt. Unit Volts Field Wire Field Wire Field Wire Rec.
- Page 17 Table 10, ALR 110F –150F Compressor and Condenser Fan Motor Amp Draw Rated Load Amps Locked Rotor Amps Compressors Compressors Unit Volts Motors Motors Across-The-Line Reduced Inrush Size Motor (Each) (Each) No. 1 No. 2 No. 3 No. 4 No. 1 No. 2 No. 3 No. 4 23.7 21.4 110F...
- Page 18 Table 11, ALR 110F – 150F Field Wiring Data, Single Point Power Wiring to Wiring to Optional Factory Mounted Standard Power Block Disconnect Switch Unit Volts Terminal Connector Wire Range/Phase Terminal Connector Wire Range/Phase Size Amps (Copper Wire Only) Amps (Copper Wire Only) (2 qty.) 1/0 - 600 MCM (2 qty.) 400 - 500 MCM...
- Page 19 Table 12, ALR 110F – 150F, Field Wiring Data, Multiple Point Power with Power Blocks Wiring to Standard Power Block Unit Volts Terminal Amps Connector Wire Range Per Phase (Copper Wire Only) Size Circuit 1 Circuit 2 Circuit 3 Circuit 1 (Fans) Circuit 2 Circuit 3 (1 qty.) #12 - 2/0...
- Page 20 Table 13, ALR 110F – 150F, Field Wiring Data, Multiple Point Power with Non-fused Disconnect Wiring to Optional Non-Fused Disconnect Unit Volts Terminal Amps Connector Wire Range Per Phase (Copper Wire Only) Size Circuit 1 Circuit 2 Circuit 3 Circuit 1 (Fans) Circuit 2 Circuit 3 (1 qty.) #14 - 1/0...
- Page 21 Notes for “Electrical Data Single Point” and “Electrical Data Multiple Point” Power: Unit wire size ampacity (MCA) is equal to 125% of the largest compressor-motor RLA plus 100% of RLA of all other loads in the circuit including the control transformer. If the control transformer option is furnished, no separate 115V power is required.
- Page 22 Figure 9, ALR 110F through 150F, Typical Field Wiring Diagram, Single Source Power ALR 110F through 150F IOMM ALR-3...
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Page 23: Dimensional Data
Dimensional Data Figure 10, ALR 110F through ALR 150F Dimensions CENTER OF WATER CONNECTIONS ISOLATOR LOCATION "A" CONN. GRAVITY SIZE LENGTH SIZE (1) FANS 95.5 41.7 36.0 5 (127.0) 95.8 (2433) 17.1 (434) 16.3 (414) 31.4 (798) 110F (5809) (2426) (1059) (914) (2591) -
Page 24: Wind Baffles And Hail Guards
Wind Baffles and Hail Guards Wind Baffles/Hail Guards are a field installed option that is used to stabilize Balloon unit operation in high wind areas and to assist in operation at low ambient Part Description Number temperatures. Figure 11 is a sketch of a typical panel assembly on an ALR Channel/Support unit. -
Page 25: Remote Evaporator
Remote Evaporator General NOTE: Remote evaporator arrangements are not included in the ARI Certification Program and capacities are therefore not ARI certified. The ALR air-cooled chillers are available with remote evaporator on R-22 service only. This allows the main unit to be installed outdoors to save interior room and eliminates the need for anti-freeze solutions and heat tracing of chilled water lines since the chilled water system is indoors. -
Page 26: Line Sizing
Line Sizing Line sizing and layout should follow procedures found in the ASHRAE Handbooks or other recognized design manuals. Nominal circuit capacities are listed in Table 14. Unloading steps are found in the Physical Data tables. Table 14, Nominal Circuit Capacities Circuit 1 Circuit 2 ALR Model... -
Page 27: Dimensions, Remote Evaporator
Dimensions, Remote Evaporator Figure 12, Remote Evaporator for ALR 110 - ALR 150 Water Refrigerant Unit Weights R-22 Operating Charge Evaporator lb. (kg) lb. (kg) Volume Volume Model Model Gal. (l) Cu.Ft. (L) Operating Shipping Circuit 1 Circuit 2 CDE350332801 34 (128) 1.4 (40.0) -
Page 28: Unit Layout And Principles Of Operation
Unit Layout and Principles of Operation Figure 13, Major Component Locations 130F, 135F, 140F, 145F, 150F 110F, 120F Comp #1 Comp #3 Cond Cond Cond Cond Cond Cond Cond Cond Cond Cond Cond Cond Comp #2 Comp #4 Evaporator Control Center All electrical controls are enclosed in a weather-resistant control center with keylocked, hinged access doors. -
Page 29: Start-Up And Shutdown
Start-up and Shutdown Pre Start-up Open all electric disconnects and check all electric connections for tightness. Check all compressor valve connections for tightness. Inspect all water piping for flow direction and correct connections at the evaporator. Verify thermostat water temperature sensor is installed in the leaving water line (supply to building). -
Page 30: Sequence Of Operation
Verify superheat temperature is at the factory setting of 8 to 12 degrees F (4.4 to 6.7 degrees C). 10. After system performance has stabilized, complete the “Compressorized Equipment Warranty Form” (Form No. 415415Y) to obtain full warranty benefits. Return the form to McQuay International through your sales representative. -
Page 31: Unit Maintenance
No maintenance is ordinarily required except the routine removal of dirt and debris from the outside surface of the fins. McQuay recommends the use of foaming coil cleaners available at most air conditioning supply outlets. Use caution when applying such cleaners as they can contain potentially harmful chemicals. -
Page 32: Refrigerant Sightglass
Refrigerant Sightglass The refrigerant sightglasses should be observed periodically. (A weekly observation should be adequate.) A clear glass of liquid indicates that there is adequate refrigerant charge in the system to provide proper feed through the expansion valve. Bubbling refrigerant in the sightglass, during stable run conditions, indicates that the system can be short of refrigerant charge. -
Page 33: Filter-Driers
Filter-Driers A replacement of the filter-drier is recommended any time excessive pressure drop is read across the filter-drier and/or when bubbles occur in the sightglass with normal subcooling. The maximum recommended pressure drops across the filter-drier are as follows: Table 16, Filter-Drier Pressure Drop PERCENT CIRCUIT MAXIMUM RECOMMENDED PRESSURE LOADING (%) - Page 34 The ALR units have a condenser coil design with approximately 15% of the coil tubes located in a subcooler section of the coil to achieve liquid cooling to within 5°F (3°C) of the outdoor air temperature when all condenser fans are operating. This is equal to about 15°F-20°F (8.3°C-11.1°C) subcooling below the saturated condensing temperature when the pressure is read at the liquid valve between the condenser coil and the liquid line filter drier.
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Page 35: Alr Troubleshooting Chart
ALR Troubleshooting Chart PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS Compressor will not Main Switch. Close Switch. Fuse Blown. Circuit breakers open Check electrical circuits and motor windings for shorts or grounds. Investigate for possible overloading. Replace fuse or reset breakers after fault is corrected. Check for loose or corroded connections. - Page 36 Post Office 2510, Staunton, Virginia 24402-2510 USA • (800) 432-1342 • www.mcquay.com...
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