McQuay AGR 070AS Installation Manual

Installation, Operation and Maintenance Manual

Air-Cooled Reciprocating Chiller

AGR 070AS through 100AS 60 Hertz, English and Metric Global Chiller Line

IOMM A G R- 1

Group: Chiller Part Number: 330145704 Effective: August 2001

Supersedes: IOMM A GR

Table of Contents

Introduction.......................................3

General Description..................................... 3

Inspection.................................................... 3

Installation......................................... 4

Handling...................................................... 4

Location....................................................... 5

Service Access and Clearances.................... 5

Vibration Isolators....................................... 7

Water Piping................................................ 8

Flow Switch................................................. 9

Water Connections....................................... 9

Refrigerant Charge ...................................... 9

Glycol Solutions........................................ 10

Evaporator Water Flow/Pressure Drop...... 12

Physical Data ...................................13

Electrical Data................................. 15

Field Wiring............................................... 15

Dimensional Data............................ 36

Crankcase Heaters......................................42

Water Cooler..............................................42

UNT Controller Operation............. 43

General Description................................... 43

Optional Sensors........................................ 43

Controller Inputs /Outputs......................... 45

Additional UNT Controller Features.........49

Alarms........................................................51

ZONE TERMINAL (optional)...................52

Zone Terminal Glossary............................. 55

UNT Controller Troubleshooting Chart..... 57

MicroTech Controller Installation

and Operation..................................58

General Description................................... 58

Optional Sensor Packages..........................58

Installation.................................................58

Sequence of Operation............................... 66

Start-Up and Shutdown.............................. 68

Keypad / Display ....................................... 69

Menu Descriptions..................................... 72

Trouble Analysis for the AGR MicroTech

Controller................................................... 83

Test Procedures..........................................86

AGR Unit Start-Up..........................38

Start-Up..................................................... 39

Shutdown................................................... 39

AGR Unit Operation....................... 40

Sequence of Operation .............................. 40

Hot Gas Bypass (Optional)........................ 41

Filter Driers ............................................... 41

System A djustment.................................... 42

Liquid Sightglass and Moisture Indicator.. 42

Refrigerant Charging................................. 42

Thermostatic Expansion Valve.................. 42

Superheat and Subcooling......................... 42

Our Facility is ISO Certified

"McQuay" is a registered trademark of McQuay International

"Illustrations and data cover McQuay International products at the time of publication and we reserve the right to

make changes in design and construction at anytime without notice."



2001 McQuay International

Unit Maintenance............................93

Preventative Maintenance Schedule.......... 94

Unit Service...................................... 95

Liquid Line Solenoid Valve....................... 95

Evaporator ................................................. 96

Refrigerant Charging..................................96

AGR Troublesh ootin g Ch art...................... 98

Notes .................................................99

2 AGR 070A through 100A IOMM AGR-1

Introduction

General Description

McQuay Air-Cooled Global water chillers are complete, self-contained automatic refrigerating units. Every unit is completely assembled, factory wired, charged, and tested. Each unit consists of twin Air-Cooled condensers with integral subcooler sections, two reciprocating compressors, replaceable tube dual circuit shell-and-tube evaporator, and complete refrigerant piping. Liquid line components include manual liquid line shutoff valves, sight-glass/moisture indicators, solenoid valves, and double diaphragm hydraulic element thermal expansion valves. Other features include compressor crankcase heaters, an evaporator heater for chilled water freeze protection, limited recycling pumpdown during “on” or “off” periods, compressor lead-lag switch to alternate the compressor starting sequence, and sequenced starting of compressors.

The electrical control center includes all safety and operating controls necessary for dependable automatic operation. Condenser fan motors are fused in all three phases and started by their own three-pole contactors. Compressors are not fused but may be protected by optional circuit breakers.

Inspection

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 name plate before unloading, making certain it agrees with the power supply available. McQuay is not responsible for physical damage after unit leaves the factory.

Note: Unit shipping and operating weights are available in the Physical Data tables beginning on page 13.

IOMM AGR-1 AGR 070A through 100A 3

Installation

Note: Installation is to be performed by qualified personnel who are familiar with local codes

and regulations.

WARNING

Sharp edges and coil surfaces are a potential hazard. Avoid contact with them.

Handling

Be careful to avoid rough handling of the unit. Do not push or pull the unit from anything other t han the base. Block the pushing vehicle away from the unit to prevent damage to the sheet metal cabinet and end frame (see Figure 1).

To lift the unit, 2 1/2" (64mm) diameter lifting holes are provided in the base of the unit. Arrange spreader bars and cables to prevent damage to the condenser coils or cabinet (see Figure 2).

Figure 1, Suggested Pushing Arrangement

Blocking is required across full width

Figure 2, Suggested Lifting Arrangement

Number of fans may vary

Spreader Bars recommended

(use caution)

4 AGR 070A through 100A IOMM AGR-1

from this diagram. The

lifting method will remain

the same

These rigging holes must be used.

Location

Unit Placement

AGR 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 Ibeam frame to support the unit above the roof. For ground level applications, install the unit on a substantial base that will not settle. A one piece concrete slab with footings extended below the frost line is recommended. Be sure the foundation is level (within 1/2” [13mm] over its length and width). The foundation must support the operating weights listed in the Physical Data tables beginning on page 13.

On ground level applications protect fins agai nst vandalism using the optional coil guard s or by erecting a screen fence. The fence must allow free flow of air to the condenser coil for proper unit operation.

Clearances

The flow of air to and from the condenser coil must not be limited. Restricting air flow or allowing air recirculation will result in a decrease in unit performance and efficiency. There must be no obstruction above the unit that would deflect discharge air downward where it could be recirculated back to the inlet of the condenser coil. The condenser fans are propeller type and will not operate with ductwork on the fan outlet.

Do not allow debris to accumulate near the unit. Air movement may draw debris into the condenser coil causing air starvation. Give special consideration to low ambient operation where snow can accumulate. Keep condenser coils and fan discharge free of snow or other obstructions to permit adequate airflow.

Sound Isolation

The ultra-low sound levels of the AGR chiller is suitable for most applications. When additional sound reduction is necessary, locate the unit away from sound sensitive areas. Avoid locations beneath windows or between structures where normal operating sounds may be objectionable. Reduce structurally transmitted sound by isolating water lines, electrical conduit and the unit itself. Use wall sleeves and rubber isolated piping hangers to reduce transmission of water or pump noise into occupied spaces. Use flexible electrical conduit to isolate sound through electrical conduit. Spring isolators are effective in reducing the low amplitude sound generated by reciprocating compressors and for unit isolation in sound sensitive areas.

Service Access and Clearances

Each end of the unit must be accessible after installation for periodic service. Compressors, filterdriers, and manual liquid line shutoff valves are accessible. The high pressure control is located in the control panel when using the Global UNT controller, and on the compressor when using the MicroTech controller. Low pressure, and motor protector controls are on the compressor. Most other operational, safety and starting controls are located in the unit control box.

The condenser fan and motors can be removed from the top of the unit.

IOMM AGR-1 AGR 070A through 100A 5

Figure 3, Clearance Requirements

AIR FLOW

AIR

DISCHARGE

AIR FLOW

10 FT.

The recommended min imu m side clear ance betwe en tw o units is 10 feet (304 8m m) . Distance less than 10 feet (3048mm) can result in air recirculation.

AIR

DISCHARGE

AIR FLOW

The unit must not be installed in a pit or enclosure tha t is deeper Or taller than the height of the unit unless extra space is provided , (consult factory) the minimum clearanc e on each side of the unit is 8 feet (2438mm) when installed in a pit.

AIR

IR FLOW

8 FT.

The minimum clearance to a side wall or building taller than the

Unit height is 6 feet (1828mm) provided no solid wall above 6 feet (1830mm) tall is closer than 8 feet (243 8mm ) to the opposite Side of the unit. (consult factory for special situations.)

DISCHARGE

AIR

DISCHARGE

IR FLOW

Do not block the flow of air to and from the condenser coil. Restricting airflow or allowing air recirculation will result in a decrease in unit performance

IR FLOW

and efficiency because discharge pressures are increased. There must be no obstruction above the unit that would deflect discharge air downward where it could be recirculated back to the inlet of the condenser coil. The condenser fans are propeller type and will not operate with ductwork on the fan outlet.

Install the unit with enough sid e clearance for air entrance to the coil and for servicing. Provide service access to the evaporator, compressors, electrical control panel and piping components. Do not allow debris to accumulate near the unit. Air movement may draw debri s into the condenser coil causing coil starvation. Give special consideration to low ambient operation where snow can accumulate. Keep condenser coils and fan discharge free of snow or other obstructions to permit adequate airflow for proper unit operation.

6 AGR 070A through 100A IOMM AGR-1

Vibration Isolators

Vibration isolators are recommended for all roof mounted installations or wherever vibration transmission is a consideration.

See Dimensional Data for dimensions required to secure each isolator to the mounting surface. The spring flex isolators are white type CP2-32, McQuay kit number 350014821, includes four spring

isolators assemblies.

Figure 4, Isolator Locations (4 and 6 fan units) Spring Isolator

Table 1, Isolator Loads at each Mounting Location with Aluminum Fins

Unit Control Box Left Control Box Right Opposite End Left Opposite End Right Size lb kg lb kg lb kg lb kg 070 1071 486 1193 541 952 432 1060 481 075 1491 676 1633 741 1137 516 1245 565 080 1542 699 1745 792 1151 522 1302 591 085 1561 708 1822 826 1171 531 1367 620 090 1675 760 1850 839 1264 573 1396 633 095 1678 761 1853 841 1266 574 1398 634 100 1678 761 1853 841 1266 574 1398 634

Table 2, Isolator Loads at each Mounting Location with Copper Fins

Unit Control Box Left Control Box Right Opposite End Left Opposite End Right Size lb kg lb kg lb kg lb kg 070 1279 580 1424 646 1137 516 1266 574 075 1828 829 2002 908 1394 632 1526 692 080 1877 851 2123 963 1400 635 1584 719 085 1889 857 2206 1001 1417 643 1654 750 090 2012 913 2222 1008 1518 689 1677 761 095 2015 914 2225 1009 1520 689 1679 762 100 2015 914 2225 1009 1520 689 1679 762

IOMM AGR-1 AGR 070A through 100A 7

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:

1. Vibration eliminators to reduce vibration and noise transmission to the building.

2. Shutoff valves to isolate the unit from the piping system during unit servicing.

3. Manual or automatic air vent valves at the high points of the system. Install drains at the lowest

points in the system.

4. A means of maintaining adequate system water pressure (expansion tank or r egulating valve).

5. Temperature and pressure indicators located at the unit to aid in unit servicing.

6. A strainer or other means of removing foreign matter from the water before it enters the pump.

Place the strainer far enough upstream to prevent cavitation at the p ump inlet (consult p ump manufacturer for recommendations). The use of a strainer will prolong pump life and keep system performance up.

7. Place a strainer in the water line just before the inlet of the evaporator. This will help prevent

foreign material from entering and decreasing the performance of the evaporator.

CAUTION

If separate disconnect is used f or the 115V supply to the evaporator heating cable, m ark the disconnect clearly to ensure disconnect is not accidentally shut off during cold seasons.

8. The shell-and-tube evaporator has a thermostat and heating cable to prevent freeze-up down to 20°F (-29°C). It is suggested that the heating cable be wired to a separate 110V supply circui t . As shipped from the factory, the heating cable is wired to the control circuit. All water piping to the unit must also be protected to prevent freezing.

9. If the unit is used as a replacement chiller on a previously existing piping system, flush the system thoroughly before unit installation. Regul ar water analysis and chemica l wate r treatment for the evaporator loop is recommended immediately at equipment start-up.

10. The total water volume in the system should be sufficient to prevent frequent “on-off” cycling. Turnover rate should not be less than 15 minutes for normal variable cooling loads. Turnover rate for process cooling or a constant load, should not be less than 6 minutes.

11. When glycol is added to the water system for freeze protection, the refrigerant suction pressure will be lower, cooling performance less, and water side pressure drop greater. If the percentage of glycol is high, or if propylene is used instead of ethylene glycol, the added pressure drop and loss of performance could be substantial. Reset the freezestat and low leaving water alarm temperatures. The freezestat is factory set to default at 36°F (2.2°C). Reset the freezestat setting to approximately 4 to 5 degrees F (2.3 to 2.8 degrees C) below the leaving chilled water setpoint temperature. See the section titled “Glycol Solutions” for additional information concerning glycol.

12. Perform a preliminary leak check before insulating the piping and filling the system.

13. Piping insulation should include a vapor barrier to prevent condensation and possible damage to the building structure.

8 AGR 070A through 100A IOMM AGR-1

Figure 5, Typica l field evaporator water piping

Flow Switch

Mount a water flow switch in either the entering or leaving (recommended) water line to shut down the unit when water flow is interrupted.

A flow switch is available from McQuay (part number 0017503300). 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 3. Installation should be as shown in Figure 6. Connect the normally open contacts of the flow switch in the unit control center at terminals 5 and 6. There is also a set of normally closed contacts on the switch that can be used for an indicator light or an alarm to indicate when a “no flow” condition exists. Freeze protect any flow switch that is installed outdoors.

NOTE: Differential pressure switches are not recommended for outdoor installation.

Table 3, Flow Switch Minimum Flow Figure 6, Flow Switch Installation

NOMINAL PIPE SIZE

INCHES (MM)

3 (76.20 30.00 (1.90) 4 (101.6) 39.70 (2.50) 5 (127.0) 58.70 (3.70) 6 (152.4) 79.20 (5.00)

MINIMUM REQUIRED ACTIVATE SWITCH -

FLOW TO GPM (L/S)

Flow direction marked

on switch

1" (25mm) NPT flow

switch connection

Tee

Water Connections

Bring water piping to the evapor ator through the side, between the verti cal supports.

Refrigerant Charge

All units are designed for use with R-22 and other refrigerants. See nameplate for specific refrigerant used. Units are shipped with an operating charge and ready for operation. The operating charge (using R-22) for each unit is shown in the Physical Data tables beginning on page 13.

IOMM AGR-1 AGR 070A through 100A 9

Figure 7, Refrigerant Piping (Some Components Are Optional)

Note: The procedure

does not specify the type of glycol. Use the derate factors found in Table 4 for corrections when using ethylene glycol and those in Table 5 for propylene glycol.

Glycol Solutions

The system glycol capacity, glycol solution flow rate in GPM, and pressure drop through the cooler may be calculated using the following formulas and data from Table 4 or Table 5.

1. Capacity -- Find the reduced capacity by multiplying the chiller’s capacity with water by the

capacity correction factor.

2. Flow -- To determine evaporator gpm (or Delta-T) knowing Delta-T (or gpm) and capacity:

)(24

GPM Glycol tionFlowCorrec

For Metric Applications -- To determine evaporator L/s (or Delta-T) knowing Delta-T (or L/s)

and kW:

L/s Glycol tionFlowCorrec

Pressure drop -- To determine pressure drop through the eva porator, when using glycol, enter

18.4

the water pressure drop curve on page 12 at the water flow rate. Multiply the water pressure drop by PD correction factor from Table 4 or Table 5 to obtain corrected glycol pressure drop.

To determine the unit's power consumption when using glycol, multiply the water system kW by

4. factor kW.

Test coolant with a clean, accurate glycol solution hydrometer (similar to that found in service stations) to determine the freezing point. Obtain percent glycol from the freezing point table below. On glycol applications it is normally recommended by the supplier that a minimum of 25% solution by weight be used for protection against corrosion.

glycolcapacity

TDelta

−

TDelta

−×

table)(from

10 AGR 070A through 100A IOMM AGR-1

CAUTION

Do not use an automotive grade antifreeze. Industrial grade glycols must be used. Automotive antifreeze contains inhibitors which will cause plating on the copper tubes within the chiller evaporator. The type and handling of glycol used must be consistent with local codes.

Table 4, Ethylene Glycol

E.G.

10 26 -3 0.991 0.996 1.013 1.070 20 18 -8 0.982 0.992 1.040 1.129 30 7 -14 0.972 0.986 1.074 1.181 40 -7 -22 0.961 0.976 1.121 1.263 50 -28 -33 0.946 0.966 1.178 1.308

Table 5, Propylene Glycol

P.G.

10 26 -3 0.987 0.992 1.010 1.068 20 19 -7 0.975 0.985 1.028 1.147 30 9 -13 0.962 0.978 1.050 1.248 40 -5 -21 0.946 0.971 1.078 1.366 50 -27 -33 0.929 0.965 1.116 1.481

Table 6, Capacity and Power Derates

ALTITUDE

SEA 10 5.6 1.000 1.000 0.993 0.998 0.970 0.991 0.927 0.977

LEVEL 12 6.7 1.005 1.002 0.998 1.000 0.975 0.993 0.932 0.979

2000 feet 10 5.6 0.986 1.009 0.979 1.007 0.956 1.000 0.914 0.986

(610 m) 12 6.7 0.992 1.011 0.985 1.009 0.962 1.002 0.919 0.988

4000 feet 10 5.6 0.973 1.021 0.966 1.019 0.944 1.012 0.902 0.998 (1220 m) 12 6.7 0.978 1.025 0.971 1.023 0.949 1.016 0.906 1.002

6000 feet 10 5.6 0.959 1.031 0.952 1.029 0.930 1.022 0.889 1.008 (1830 m) 12 6.7 0.963 1.034 0.956 1.032 0.934 1.024 0.893 1.011

Freeze Point

°F °C

Freeze Point

°F °C

Chilled Water

Delta-T

°F °C Cap. Power Cap. Power Cap. Power Cap. Power

6 3.3 0.992 0.995 0.985 0.993 0.962 0.986 0.919 0.972 8 4.4 0.995 0.997 0.988 0.995 0.965 0.988 0.922 0.974

14 6.8 1.010 1.005 1.003 1.003 0.980 0.996 0.936 0.982 16 8.9 1.014 1.007 1.007 1.005 0.984 0.998 0.940 0.984

6 3.3 0.978 1.005 0.971 1.003 0.949 0.996 0.906 0.982 8 4.4 0.982 1.007 0.975 1.005 0.953 0.998 0.910 0.984

14 6.8 0.997 1.014 0.990 1.012 0.967 1.005 0.924 0.991 16 8.9 1.000 1.016 0.993 1.014 0.970 1.007 0.927 0.993

6 3.3 0.966 1.016 0.959 1.014 0.937 1.007 0.895 0.993 8 4.4 0.969 1.018 0.962 1.016 0.940 1.009 0.898 0.995

14 6.8 0.982 1.027 0.975 1.025 0.953 1.018 0.910 1.004 16 8.9 0.986 1.028 0.979 1.026 0.956 1.019 0.914 1.005

6 3.3 0.953 1.025 0.946 1.023 0.924 1.016 0.883 1.002 8 4.4 0.955 1.028 0.948 1.026 0.926 1.019 0.885 1.005

14 6.8 0.968 1.036 0.961 1.034 0.939 1.026 0.897 1.013 16 8.9 0.972 1.037 0.965 1.035 0.943 1.027 0.901 1.014

Cap. kW Flow PD

Fouling Factor

0.0001 (0.0176) 0.00025 (0.044) 0.00075 (0.132) 0.00175 (0.308)

IOMM AGR-1 AGR 070A through 100A 11

Evaporator Water Flow/Pressure Drop

Evaporator flow rate must fall between the minimum and maximum values shown in the evaporator pressure drop table on page 12. Varying chilled water flow through the evaporator while the compressor(s) are operating is not recommended.

Figure 8, Pressure Drop Curve

090 - 100

070

Unit

Size

(ft) of Water (gpm) (lps) (ft) of Water (gpm) (lps) (ft) of Water (gpm) (lps) 070AS 11.2 162 10.22 28.1 270 17.03 4.8 101 6.39 075AS 8.9 172 10.85 22.5 287 18.09 3.8 108 6.78 080AS 10.3 187 11.80 25.9 312 19.66 4.4 117 7.37 085AS 11.8 202 12.74 29.7 337 21.24 5.0 126 7.97 090AS 10.5 208 13.12 26.3 347 21.87 4.5 130 8.20 095AS 12.0 224 14.13 30.0 373 23.55 5.2 140 8.83 100AS 13.4 238 15.02 33.6 397 25.02 5.7 149 9.38

Minimum and maximum flows are established to ensure the Delta-T for each unit size falls within the 6 - 16°F range for proper unit control. Contact factory for unit operation outside of minimum and maximum flows shown.

NOMINAL MAXIMUM MINIMUM

PD Flow PD Flow PD Flow

075 - 085

12 AGR 070A through 100A IOMM AGR-1

Physical Data

Table 7, AGR 070AS – AGR 085AS

PHYSICAL DATA STANDARD EFFICIENCY

BASIC DATA Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2

Unit Capacity @ ARI Conditions (1), Tons (kW) 67.5 (237.6) 70.1 (246.7) 77.9 (273.9) 84.7 (298.1) Number Of Refrigerant Circuits 2222 Unit Operating Charge, R-22, lbs. (kg) 60 (27.2) 84 (38.1) 84 (38.1) 86 (39.9) 86 (39.9) 86 (39.9) 86 (39.9) 86 (39.9) Unit Operating Charge, R-134a, , lbs. (kg) 63 (28.6) 88 (40.0) 88 (40.0) 90 (41.9) 90 (41.9) 90 (41.9) 90 (41.9) 90 (41.9) Cabinet Dimensions, LxWxH, In. 94.0 x 88.2 x 96.2 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2 Cabinet Dimensions, LxWxH, (mm) 2388 x 2241 x 2444 3463 x 2241 x 2444 3463 x 2241 x 2444 3463 x 2241 x 2444 Unit Operating Weight, Lbs. (kg) 4276 (5506) 5506 (2497) 5740 (2604) 5921 (2686) Unit Shipping Weight, Lbs. (kg) 4169 (5359) 5359 (2431) 5593 (2537) 5774 (2619) Add'l Weight If Copper Finned Coils, Lbs. (kg) 830 (375) 1245 (565) 1245 (565) 1245 (565)

COMPRESSORS

Type Semi-Hermetic Semi-Hermetic Semi-Hermetic Semi-Hermetic Nominal Horsepower 35 40 40 40 40 50 50 50 Number Of Cylinders Per Compressor 66666888 Oil Charge Per Compressor, oz. 140 255 255 255 255 255 255 255 Oil Charge Per Compressor, (g) (3969) (7229) (7229) (7229) (7229) (7229) (7229) (7229)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Standard Staging - Circuit #1 in Lead 0-16-33-49-67 0-17-33-50-67 0-15-42-58-73 0-25-50-63-75 Standard Staging - Circuit #2 in Lead 0-17-33-51-67 0-17-33-50-67 0-27-42-56-71 0-25-50-63-75

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area, sq. ft. 58 58 87 87 87 87 87 87 Coil Face Area, (m2) (5.4) (5.4) (8.1) (8.1) (8.1) (8.1) (8.1) (8.1) Finned Height x Finned Length, In. 100x 83.5 100x 83.5 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3

Finned Height x Finned Length, (mm) Fins Per Inch x Rows Deep 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3

Pumpdown capacity @ 90% lbs. (kg) 108 (49) 108 (49) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73) Maximum Relief Valve Pressure Setting, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103)

CONDENSER FANS – DIRECT DRIVE PROPELLER TYPE

Number Of Fans - Fan Diameter, In. (mm) 4 - 28 (712) 6 - 28 (712) 6 - 28 (712) 6 - 28 (712) Number Of Motors - HP (kW) 4 - 2.0 (1.5) 6 - 2.0 (1.5) 6 - 2.0 (1.5) 6 - 2.0 (1.5) Fan And Motor RPM, 60Hz 1140 1140 1140 1140 60 Hz Fan Tip Speed, fpm (m/Sec) 8357 (35.4) 8357 (35.4) 8357 (35.4) 8357 (35.4) 60 Hz Total Unit Airflow, cfm (m3/sec) 40800 (19.3) 61200 (28.9) 61200 (28.9) 61200 (28.9)

DIRECT EXPANSION EVAPORATOR - BAFFLED SHELL AND THRU-TUBE

Diameter, in. - Length, ft. 12.75- 4 12.75 - 5.5 12.75 - 5.5 12.75 - 5.5 Diameter, (mm) – Length, (mm) 324 - 1220 324 - 1676 324 - 1676 324 - 1676 Water Volume, gallons, (l) 12.8 (48.5) 17.6 (66.6) 17.6 (66.6) 17.6 (66.6) Maximum Water Pressure, psig (kPa) 175 (1207) 175 (1207) 175 (1207) 175 (1207) Maximum Refrigerant Working Pressure, psig (kPa) 225 (1552) 225 (1552) 225 (1552) 225 (1552) Water Inlet / Outlet Victaulic Connections, In. (mm) 5 (141.3) 5 (141.3) 5 (141.3) 5 (141.3) Drain - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) .375 (9.5) Vent - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) .375 (9.5) NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range.

070AS 075AS 080AS 085AS

-83-100 -83-100 -86-100 -88-100

-84-100 -83-100 -85-100 -88-100

2032 x

2121

2032 x

2121

AGR MODEL NUMBER

2540 x

3183

2540 x

3183

2540 x

3183

2540 x

3183

2540 x

3183

2540 x

3183

IOMM AGR-1 AGR 070A through 100A 13

Table 8, AGR 090A – AGR 100A

PHYSICAL DATA AGR MODEL NUMBER STANDARD EFFICIENCY 090AS 095AS 100AS BASIC DATA Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2

Unit Capacity @ ARI Conditions (1), Tons (kW) 86.5 (304.1) 93.4 (328.4) 99.3 (349.1) Number Of Refrigerant Circuits 2 2 2 Unit Operating Charge, R-22, lb. 90 90 90 90 92 92 Unit Operating Charge, R-22, (kg) (40.8) (40.8) (40.8) (40.8) (41.7) (41.7) Cabinet Dimensions, LxWxH, In. 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2 Cabinet Dimensions, LxWxH, (mm) 3463 x 2241 x 2444 3463 x 2241 x 2444 3463 x 2241 x 2444 Unit Operating Weight, Lbs. (kg) 6184 (2805) 6194 (2810) 6194 (2810) Unit Shipping Weight, Lbs. (kg) 6008 (2725) 6018 (2730) 6018 (2730) Add'l Weight If Copper Finned Coils, Lbs. (kg) 1245 (565) 1245 (565) 1245 (565)

COMPRESSORS

Type Semi-Hermetic Semi-Hermetic Semi-Hermetic Nominal Horsepower 50 50 50 60 60 60 Number Of Cylinders Per Compressor 888888 Oil Charge Per Compressor, Oz. 255 255 255 255 255 255 Oil Charge Per Compressor, (g) (7229) (7229) (7229) (7229) (7229) (7229)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Standard Staging - Circuit #1 in Lead 0-25-50-63-75-

Standard Staging - Circuit #2 in Lead 0-25-50-63-75-

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area, Sq. Ft. 878787878787 Coil Face Area, (M2) (8.1) (8.1) (8.1) (8.1) (8.1) (8.1) Finned Height x Finned Length, In. 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3 Finned Height x Finned Length, (mm) 2540 x

Fins Per Inch x Rows Deep 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 Maximum Relief Valve Pressure Setting, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103)

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

Number Of Fans - Fan Diameter, In. (mm) 6 - 28 (712) 6 - 28 (712) 6 - 28 (712) Number Of Motors - HP (kW) 6 - 2.0 (1.5) 6 - 2.0 (1.5) 6 - 2.0 (1.5) Fan And Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, FPM (M/Sec) 8357 (35.4) 8357 (35.4) 8357 (35.4) 60 Hz Total Unit Airflow, CFM (M3/sec) 61200 (28.9) 61200 (28.9) 61200 (28.9)

DIRECT EXPANSION EVAPORATOR - BAFFLED SHELL AND THRU-TUBE

Diameter, in. - Length, Ft. 14 - 5.5 14 - 5.5 14 - 5.5 Diameter, (mm) - Length, (mm) 356 - 1676 356 - 1676 356 - 1676 Water Volume, Gallons, (L) 21.2 (80.3) 21.2 (80.3) 21.2 (80.3) Maximum Water Pressure, psig (kPa) 175 (1207) 175 (1207) 175 (1207) Maximum Refrigerant Working Pressure, psig (kPa) 225 (1552) 225 (1552) 225 (1552) Water Inlet / Outlet Victaulic Connections, In. (mm) 5 (141.3) 5 (141.3) 5 (141.3) Drain - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) Vent - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) NOTE:

1. Nominal capacity based on 95°F ambient air and 54°F/44°F water range.

3183

88-100

2540 x

3183

0-23-50-61-75

88-100

0-27-50-61-75-

88-100

2540 x

3183

2540 x

3183

0-25-50-63-75

88-100

0-25-50-63-75-

88-100

2540 x

3183

2540 x

3183

14 AGR 070A through 100A IOMM AGR-1

Electrical Data

Field Wiring

Internal power wiring to the compressors for single and multiple point option are differ ent. 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. Copper wire is required for all power lead terminations at the unit. Aluminum or copper can be used for all other wiring.

Standard AGR units have internal power wiring for single point power connection. A single large power terminal block is provided and wiring within the unit is sized in accordance with the National Electrical Code. A single field supplied fused disconnect is required. The control transformer with fuses is factory installed.

If the evaporator heater is on a separate disconnect switch from the main unit power supply, the unit may be shut down without defeating the freeze protection (115V, 420W heat tape) provided by the cooler heater.

CAUTION

IOMM AGR-1 AGR 070A through 100A 15

Table 9, 60 Hz, Single Point Power Electrical Data

AGR

Unit Size

070AS 070AM

075AS 075AM

080AS 080AM

085AS 085AM

090AS 090AM

095AS 095AM

100AS 100AM

All Electrical Data notes are on page 19.

Volts

208 322 3 400 1 2.50 450 230 300 3 350 1 2.50 400 380 190 3 3/0 1 2.00 250 460 153 3 2/0 1 1.50 200 575 114 3 #2 1 1.25 150

208 351 3 500 1 3.00 450 230 329 3 400 1 2.50 450 380 220 3 4/0 1 2.00 300 460 163 3 2/0 1 1.50 225 575 126 3 #1 1 1.50 150

208 384 6 3/0 2 2.00 500 230 373 3 500 1 3.00 500 380 240 3 250 1 2.50 300 460 187 3 3/0 1 2.00 250 575 151 3 2/0 1 1.50 200

208 411 6 4/0 2 2.00 500 230 408 6 4/0 2 2.00 500 380 256 3 300 1 2.50 350 460 206 3 4/0 1 2.00 250 575 171 3 3/0 1 2.00 225

208 461 6 250 2 2.00 600 230 458 6 4/0 2 2.00 600 380 269 3 300 1 2.50 350 460 220 3 4/0 1 2.00 300 575 176 3 3/0 1 2.00 225

208 501 6 250 2 2.00 700 230 498 6 250 2 2.00 700 380 279 3 300 1 2.50 350 460 231 3 250 1 2.00 300 575 180 3 3/0 1 2.00 250

Minimum

Circuit

Ampacity

(MCA)

Quantity

POWER SUPPLY

Field Wire Conduit Hub

Wire

Gauge

Quantity

Nominal

Size

Max. Fuse

HACR Breaker

Size

16 AGR 070A through 100A IOMM AGR-1

Table 10, 60 Hz, Compressor and Condenser Fan Motor Amp Draw

AGR

Unit

Size

070AS 070AM

075AS 075AM

080AS 080AM

085AS 085AM

090AS 090AM

095AS 095AM

100AS 100AM

All Electrical Data notes are on page 19.

Rated Load Amps Locked Rotor Amps

Volts

208 122 135 7.8 4 30.5 N.A. N.A. 400 463 230 112 127 7.2 4 27.6 N.A. N.A. 340 340 380 65 87 4.1 4 20.0 365 365 N/A N/A 460 60 63 3.6 4 13.8 315 315 195 195 575 42 48 3.0 4 11.0 245 245 152 152

208 135 135 7.8 6 30.5 N.A. N.A. 463 463 230 127 127 7.2 6 27.6 N.A. N.A. 340 340 380 87 87 4.1 6 20.0 365 365 N/A N/A 460 63 63 3.6 6 13.8 315 315 195 195 575 48 48 3.0 6 11.0 245 245 152 152

208 135 162 7.8 6 30.5 N.A. N.A. 463 654 230 127 162 7.2 6 27.6 N.A. N.A. 340 654 380 87 103 4.1 6 20.0 365 740 N/A N/A 460 63 82 3.6 6 13.8 315 510 195 330 575 48 68 3.0 6 11.0 245 405 152 262

208 162 162 7.8 6 30.5 N.A. N.A. 654 654 230 162 162 7.2 6 27.6 N.A. N.A. 654 654 380 103 103 4.1 6 20.0 740 740 N/A N/A 460 82 82 3.6 6 13.8 510 510 330 330 575 68 68 3.0 6 11.0 405 405 262 262

208 162 202 7.8 6 30.5 N.A. N.A. 654 654 230 162 202 7.2 6 27.6 N.A. N.A. 654 654 380 103 113 4.1 6 20.0 740 740 N/A N/A 460 82 93 3.6 6 13.8 510 510 330 330 575 68 72 3.0 6 11.0 405 405 262 262

208 202 202 7.8 6 30.5 N.A. N.A. 654 654 230 202 202 7.2 6 27.6 N.A. N.A. 654 654 380 113 113 4.1 6 20.0 740 740 N/A N/A 460 93 93 3.6 6 13.8 510 510 330 330 575 72 72 3.0 6 11.0 405 405 262 262

Compressors Compressors

No.

Fan

Motors

(Each)

No. Of

Fan

Motors

Fan Motors (Each)

Across-The-Line Part Winding (1) No. 1No. 2No. 1No. 2

IOMM AGR-1 AGR 070A through 100A 17

Table 11, 60 Hz Single Point Power, Fie ld Wiring Data

AGR

Unit Size

070AS 070AM

075AS 075AM

080AS 080AM

085AS 085AM

090AS 090AM

095AS 095AM

100AS 100AM

All Electrical Data notes are on page 19.

Volts

208 335 # 4 - 400 MCM 400 250 - 500 MCM 230 335 # 4 - 400 MCM 400 250 - 500 MCM 380 335 # 4 - 400 MCM 250 #4 - 350 MCM 460 335 # 4 - 400 MCM 250 #4 - 350 MCM 575 335 # 4 - 400 MCM 150 #2 - 3/0

208 840 (2 qty.) 1/0 - 600 MCM 400 250 - 500 MCM 230 335 # 4 - 400 MCM 400 250 - 500 MCM 380 335 # 4 - 400 MCM 250 #4 - 350 MCM 460 335 # 4 - 400 MCM 250 #4 - 350 MCM 575 335 # 4 - 400 MCM 150 #2 - 3/0

208 840 (2 qty.) 1/0 - 600 MCM 400 250 - 500 MCM 230 840 (2 qty.) 1/0 - 600 MCM 400 250 - 500 MCM 380 335 # 4 - 400 MCM 250 #4 - 350 MCM 460 335 # 4 - 400 MCM 250 #4 - 350 MCM 575 335 # 4 - 400 MCM 250 #4 - 350 MCM

208 840 (2 qty.) 1/0 - 600 MCM 600 (2 qty.) 250 - 500 MCM 230 840 (2 qty.) 1/0 - 600 MCM 600 (2 qty.) 250 - 500 MCM 380 335 # 4 - 400 MCM 400 250 - 500 MCM 460 335 # 4 - 400 MCM 250 #4 - 350 MCM 575 335 # 4 - 400 MCM 250 #4 - 350 MCM

Terminal

Wiring to Standard Wiring to Optional

Power Block Non-Fused Disconnect Switch

Amps

Connector Wire Range

(Copper Wire Only)

Terminal

Amps

Connector Wire Range

(Copper Wire Only)

18 AGR 070A through 100A IOMM AGR-1

Notes for “Electrical Data Single Point” Power:

1. 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, a separate 115v power is not required.

If a separate 115V power supply is used for the control circuit, then the wire sizing amps is 10

3. amps for all unit sizes.

Recommended power lead wire sizes for 3 conductors per conduit are based on 100% conductor

4. ampacity in accordance with NEC. Nominal voltage drop has been included. It is recommended that power leads be kept short. All terminal block connections must be made with copper (type THW) wire.

“Recommended Fuse Sizes or HACR breaker size” is selected at approximately 150% to 175%

5. of the largest compressor RLA, plus 100% of all other loads in the circuit.

“Maximum Fuse or HACR breaker size” is selected based on 225% of the largest compressor

6. RLA, plus 100% of all other loads in the circuit.

The recommended power lead wire sizes are based on an ambient temperature of 86°F (30°C).

7. Ampacity correction factors must be applied for other ambient temperatures. Refer to the National Electrical Code Handbook.

Must be electrically grounded according to national and local electrical codes.

The MCA may vary slightly due to motor options such as SpeedTrol, TEFC.

Voltage Limitations:

Within ± 10 percent of unit nameplate rating.

Notes for “Compressor and Condenser Fan Amp Draw”:

1. Compressor RLA values are for wiring sizing purposes o nly and may be higher than nominal operating current draw at rated capacity.

If unit is equipped with SpeedTrol condenser fan motors, the first motor on each refrigerant

2. circuit is a single phase, 1hp motor, with a FLA of 2.8 amps at 460 volts, 5.6 amps at 208, 230, and 575 volts.

Compressor LRA for reduced inrush start are for the first winding of part-winding start only.

If the unit is equipped with SpeedTrol motors, the first motor is a single phase, 1 hp motor, with a

LRA of 7.3 amps at 460 volts, 14.5 amps at 208, 230, and 575 volts.

Notes for “Field Wiring Data”:

1. The standard unit requires a single disconnect to supply electrical power to the unit. Power supply must either be fused or use an HACR type circuit breaker.

Multiple point power connection for field wiring is available as an option. Two power terminal

2. blocks are supplied in the unit, one for each system in the unit. Each power terminal block supplies both compressor and fan motor power for each system. If the control transformer option is furnished, it is connected to the system #1 power terminal block.

All field wiring to unit power block or optional non-fused disconnect switch must be copper.

All field wire size values given in table apply to 75°C rated wire per NEC. Following NEC

guidelines for other wire ratings such as 90°C.

IOMM AGR-1 AGR 070A through 100A 19