McQuay AGZ 026BB Installation Manual

Installation and Maintenance Manual

Air-Cooled Scroll Compressor Chiller

AGZ 026BS/BH through 130BS/BH, Packaged AGZ 026BB/BM through 130BB/BM, Remote Evaporator

60 Hertz, R-22, R-407c

IMM A GZ -7

Group: Chiller Part Number: 331374001 Effective: February 2005 Supercedes: IOMM A GZ -6

y

Table of Contents

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

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

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

Nomenclature...............................................3

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

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

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

Vibration Isolators......................................12

Ambient Air T emperature Limitations........15

Water Piping...............................................17

Flow Switch................................................19

Water Connections......................................20

System Water Volume Considerations........20

Variable Speed Pumping ............................20

Glycol Solutions.........................................20

Operating/Standby Limits...........................24

Evaporator Flow and Pressure Drop Water Flow

Limitations..................................................24

Wind Baffles and Hail Guards....................26

Optional Features............................28

Controls......................................................28

BAS Interface.............................................28

Remote Operator Interface Panel...............29

Physical Data ...................................31

Startup..............................................59

Pre Start-up................................................ 59

Start-Up ..................................................... 59

Shutdown................................................... 60

Water Piping Checkout.............................. 60

Refrigerant Piping Checkout...................... 60

Electrical Check Out.................................. 61

Component Operation.....................61

Hot Gas Bypass (Optional)........................ 61

VFD Low Ambient Control (Optional) ...... 62

Filter-Driers............................................... 62

System A djustment.................................... 62

Liquid Line Sight Glass............................. 62

Refrigerant Charging ................................. 62

Thermostatic Expansion Valve .................. 63

Crankcase Heaters ..................................... 63

Evaporator ................................................. 63

Phase Voltage Monitor (Optional)............. 63

Unit Maintenance.............................64

Preventive Maintenance Schedule............. 65

Service...............................................66

Liquid Line Solenoid Valve ....................... 66

Evaporator ................................................. 67

Refrigerant Charging ................................. 67

Electrical Data, Standard Ambient 36

Electrical Data High Ambient........46

Dimensional Data............................ 54

Warranty Statement ........................68

AGZ Troubleshooting Chart...........69

R-407C Units.................................... 57

Manufactured in an ISO Certified facilit

"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.

2 AGZ 026B through 130B IMM AGZ-7

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 tandem or triple scroll compressors, brazed-plate or 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 thermal expansion valves. Other features include compressor crankcase heaters, an evaporator heater for chilled water freeze protection, limited pumpdown during “on” or “off” periods, automatic compressor lead-lag to alternate the compressor starting sequence, and sequenced starting of compressors.

The electrical control center includes all equipment protection and operating controls necessary for dependable automatic operation. Condenser fan motors are protected in all three phases and started by their own three-pole contactors.

Manuals

This manual covers the installation, maintenance and service for dual circuit, AGZ, scroll compressor chillers. Operating information is contained in the operating manual OM AGZ-1.

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

Note: Unit shipping and operating weights are available in the Physical Data tables beginning on page 31.

Nomenclature

A G Z - XXX B S

Scroll Compressor

Air-Cooled

Global

Application S= Standard Ambient, Packaged M= Standard Ambient, Remote H= High Ambient, Packaged B= High Ambient, Remote

Design Vintage

IMM AGZ-7 AGZ 026B through 130B 3

Model Size (Nominal Tons)

Installation

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

with local codes and regulations.

WARNING

Sharp edges on unit and coil surfaces are a potential hazard to personal safety.

Avoid contact with them.

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 (see Figure 1).

To lift the unit, 2 1/2" (64mm) diameter lifting tabs are provided on 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

from this diagram. The lifting

Spreader bars

required

(use caution)

method will remain the same.

All rigging locations must be used.

4 AGZ 026B through 130B IMM AGZ-7

Location

A

Unit Placement

Figure 3, Clearances

AGZ units are for outdoor applications and can be mounted either on a roof or at ground level. For roof mounted applications, install the unit on a steel channel or I-beam frame to support the unit above the roof. For ground level applications, install the unit on a

4 FT. (1220mm) CLEARANCE FOR

SERVICE ACCESS

substantial base that will not settle. A onepiece 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 be strong enough to support the weights listed in the Physical Data Tables beginning on page 31.

Table 1, Recommended Minimum Clearances

Model Size

026B – 070B 075B – 130B

Coil Side “A”

ft (m)

4 (1.2) 8 (2.4) 6 (1.8) 4 (1.2) 4 (1.2) 6 (1.8) 12 (3.6) 8 (2.4) 4 (1.2) 4 (1.2)

“B”

ft (m)

“C”

ft (m)

End Opposite

Controls ft (m)

Clearances

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 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.

Install the unit with enough side clearance for air to enter 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 where it could be drawn into the condenser coil. Keep condenser coils and fan discharge free of snow or other obstructions to permit adequate airflow for proper operation.

AIR FLOW

The recommended minimum side clearance be tw een two units is dimension “B’ in table on this page.

AIR FLOW

The unit must not be installed in a pit or encl osure that is deeper or taller than the height of the unit unless extra space is provided. The minimum clearance on each side of the unit is dimension “C” in tabl e on this page.

SEE ATTACHED TABLE

DIMENSION “A”

SEE ATTACHED TABLE

DIMENSION “A”

Control Panel End

AIR

DISCHARGE

AIR FLOW

“B”

AIR

DISCHARGE

“C” “C”

ft. (m)

4 FT. (1220) CLEARANCE FOR

SERVICE ACCESS

AIR

DISCHARGE

IR FLOW

IMM AGZ-7 AGZ 026B through 130B 5

Restricted Air Flow General

The clearances required for design-life operation of AGZ air-cooled condensers are described in the previous section. Occasionally, these clearances cannot be maintained due to site restrictions such as units being too close together or a fence or wall restricting airflow, or both.

Fortunately, the McQuay AGZ chillers have several features that can mitigate the problems attributable to restricted airflow.

• The condenser section is shaped as shown Figure 4. This allows inlet air for these coils to come in from either side. A vertical coil and its adjacent angled coil are manifolded together to serve one refrigerant circuit.

• The MicroTech II™ control is proactive in response to “off-design conditions”. In the case of single or compounded influences restricting airflow to the unit, the microprocessor will act to keep the compressor(s) running (possibly at reduced capacity) rather than allowing a shut-off on high discharge pressure.

• The MicroTech II™ control can be programmed to sequence the compressors in the most advantageous way. For example, in the diagram shown below, it might be desirable to program circuit #1 to be the lag circuit (last circuit to reach full load) during periods of high ambient temperatures.

Figure 4, Coil and Fan Arrangement

Building

Circuit #1 Circuit #2

NOTE: Models AGZ 026 to 035 do not have an interior slanted coil.

The following sections discuss the most common situations of condenser air restriction and give capacity and power adjustment factors for each. Note that in unusually severe conditions, the MicroTech II™ controller would adjust the unit operation to remain online until a less severe condition is reached.

6 AGZ 026B through 130B IMM AGZ-7

Case 1, Building or Wall on One Side of One Unit

A

The existence of a screening wall or the wall of a building in close proximity to an air-cooled chiller is common in both rooftop and ground level applications. Hot air recirculation on the coils adjoining the wall will increase compressor discharge pressure, decreasing capacity and increasing power consumption. Only the compressor(s) connected to these coils will be affected. Circuits opposite the wall are unaffected.

When close to a wall, it is desirable to place chillers on the north or east side of them. It is also desirable to have prevailing winds blowing parallel to the unit’s long axis. The worst case is to have wind blowing hot discharge air into the wall.

Figure 5, Unit Adjacent to Wall

H

Figure 6, Adjustment Factors

3.0

2.0

1.0

.5

D

GZ

075-130

4.5 ft.

(1.4m)

6 ft.

(1.8m)

8 ft.

(2.4m)

AGZ

026-070

3.5 ft.

(1.0m)

4 ft.

(1.2m)

6 ft.

(1.8m)

4.0

3.0

2.0

AGZ

6 ft.

8 ft.

AGZ

026-070

3.5 ft.

(1.0m)

4 ft.

(1.2m)

6 ft.

(1.8m)

075-130

4.5 ft.

(1.4m)

(1.8m)

(2.4m)

0

IMM AGZ-7 AGZ 026B through 130B 7

Case 2, Two Units Side By Side

A

Two or more units sited side by side are common. If spaced closer than 12 feet (3.7 meters) or 8 feet (2.5meters) depending on size, it is necessary to adjust the performance of each unit; circuits adjoining each other are affected. NOTE: This case applies only to two units side by side. See Case 3 for three or more parallel units. If one of the two units also has a wall adjoining it, see Case 1. Add the two adjustment factors together and apply to the unit located between the wall and the other unit.

Mounting units end to end will not necessitate adjusting performance. Depending on the actual arrangement, sufficient space must be left between the units for access to the control panel door opening and/or evaporator tube removal. See “Clearance” section of this guide for requirements for specific units.

Figure 7, Two Units Side by Side

Figure 8, Adjustment Factor

3.0

2.0

1.0

0

GZ 075-130

GZ 026-070

9

(2.7)

6.5

(2.0)

10

(3.0)

7

(2.1)

11

(3.3)

7.5

(2.2)

12

(3.6)

8

(2.4)

GZ 075-130

GZ 026-070

6.0

4.0

2.0

0

9

(2.7)

6.5

(2.0)

10

(3.0)

7

(2.1)

11

(3.3)

7.5

(2.2)

12

(3.6)

8

(2.4)

8 AGZ 026B through 130B IMM AGZ-7

Case 3, Three or More Units Side By Side

A

When three or more units are side by side, the outside chillers (1 and 3 in this case) are influenced by the middle unit only on their inside circuits. Their adjustment factors will be the same as Case 2. All inside units (only number 2 in this case) are influenced on both sides and must be adjusted by the factors shown below.

Figure 9, Three or More Units

GZ 075-130 GZ 026-070

Chiller 1 Chiller 2 Chiller 3

Figure 10, Adjustment Factor

4.0

3.0

2.0

1.0

0

15

(4.6)

11

(3.3)

16

(4.9)

12

(3.7)

17

(5.2)

13

(4.0)

18

(5.5)

14

(4.3)

GZ 075-130

GZ 026-070

8.0

6.0

4.0

2.0

0

15

(4.6)

11

(3.3)

16

(4.9)

12

(3.7)

17

(5.2)

13

(4.0)

18

(5.5)

14

(4.3)

IMM AGZ-7 AGZ 026B through 130B 9

Case 4, Open Screening Walls

Decorative screening walls are often used to help conceal a unit either on grade or on a rooftop. These walls should be designed such that the combination of their open area and distance from the unit do not require performance adjustment. It is assumed that the wall height is equal to or less than the unit height when mounted on its base support. This is usually satisfactory for concealment. If the wall height is greater than the unit height, see Case 5, Pit Installation.

The distance from the ends of the unit to the end walls should be sufficient for service, opening control panel doors, and pulling evaporator tubes, as applicable.

If each side wall is a different distance from the unit, the distances can be averaged providing either wall is not less than 8 feet (2.4 meters) from the unit. For example, do not average 4 feet and 20 feet to equal 12 feet.

Figure 11, Open Screening Walls

Figure 12, Wall Free Area vs Distance

AGZ

026-070

4

(1.2)

3.5

(1.0)

3.0

(0.9)

2.5

(0.7)

AGZ

075-130

6

(1.8)

5

(2.0)

4

(1.2)

3

(0.9)

01020304050

10 AGZ 026B through 130B IMM AGZ-7

Case 5, Pit/Solid Wall Installation

Pit installations can cause operating problems and great care should be exercised if they are to be used on an installation. Recirculation and restriction can both occur. A solid wall surrounding a unit is substantially the same as a pit and the data presented here should be used.

Steel grating is sometimes used to cover a pit to prevent accidental falls or trips into the pit. The grating material and installation design must be strong enough to prevent such accidents, yet provide abundant open area or serious recirculation problems will occur. Have any pit installation reviewed by McQuay application engineers prior to installation to make sure it has sufficient air-flow characteristics. The installation design engineer must approve the work to avoid the risk of accident.

Figure 13, Pit Installati on

Figure 14, Adjustment Factor

D=4

(1.4)

D=6

(1.8)

D=5 (2.0)

D=8 (2.4)

075-130

D=10

AGZ

026-070

AGZ

075-130

AGZ

(3.1)

AGZ

026-070

D=7 (2.1)

D=4 (1.4)

D=6 (1.8)

D=5 (2.0)

D=8 (2.4)

AGZ

075-130

D=10

(3.1)

AGZ

026-070

D=7 (2.1)

AGZ

026-070

AGZ

075-130

IMM AGZ-7 AGZ 026B through 130B 11

Sound Isolation

The low sound level of the AGZ 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 transmission through electrical conduit. Spring isolators are effective in reducing the low amplitude sound generated by scroll compressors and for unit isolation in sound sensitive areas.

Vibration Isolators

Vibration isolators are recommended for all roof-mounted installations or wherever vibration transmission is a consideration. Table 2 lists isolator loads for all unit sizes.

Neoprene-in-Shear Dimensions

Color Code L W H B C D Gray 5.5 3.37 1.75 0.5 4.12 0.56 Black, Red 6.25 4.62 1.62 0.5 5.0 0.56

Spring Isolator Dimensions

Figure 15 shows isolator locations. See Dimensional Data starting on page 36 for detailed mounting hole locations.

Isolators are also recommended for slab installations, primarily to keep the unit base from resting its entire length directly on the slab.

Isolator Installation

The unit should be initially installed on shims or blocks at the listed free height. When all piping, wiring, flushing, charging, etc. is completed, adjust the springs upward to load them and to provide clearance to remove the shims or blocks.

Installation of spring isolators requires flexible piping connections and at least three feet of conduit flex tie-ins. Piping and conduit must be supported independently of the unit.

Figure 15, Isolator Locations

4 or 6 FAN UNIT 8 FAN UNIT

CONTROL

PANEL

12 AGZ 026B through 130B IMM AGZ-7

34

CONTROL

PANEL

12

45

12

6

3

Table 2, AGZ-BS/BH, Isolator Loads At Each Mounting Location (With Aluminum Fins)

Unit Size

026B 4 1281 580 941 426 1020 462 748 339 - - - - 3990 1807 72 32 030B 4 1297 588 952 431 1032 467 759 344 - - - - 4040 1830 72 32 035B 4 1283 581 942 427 1069 484 786 356 - - - - 4080 1848 72 32 040B 4 1360 616 940 426 1082 490 748 339 - - - - 4130 1871 72 32 045B 4 1377 624 952 431 1148 520 793 359 - - - - 4270 1934 72 32 050B 4 1384 627 1016 460 1153 522 847 384 - - - - 4400 1993 119 54 055B 4 1391 630 1085 492 1159 525 905 410 - - - - 4540 2057 119 54 060B 4 1410 639 1099 498 1175 532 916 415 - - - - 4600 2084 142 65 065B 4 1382 626 1214 550 1205 546 1059 480 - - - - 4860 2202 142 65 070B 4 1419 643 1246 564 1238 561 1087 492 - - - - 4990 2260 217 99 075B 6 1854 840 1411 639 1854 840 1411 639 - - - - 6530 2958 217 99 085B 6 1942 880 1479 670 1856 841 1413 640 - - - - 6690 3031 217 99 090B 6 1975 895 1450 657 1975 895 1450 657 - - - - 6850 3103 217 99 100B 8 1464 663 1341 607 1219 552 1400 634 1282 581 1164 527 7870 3565 289 131 110B 8 1513 685 1358 615 1204 545 1513 685 1358 615 1204 545 8150 3692 289 131 120B 8 1656 750 1486 673 1317 597 1582 717 1420 643 1259 570 8720 3950 289 131 130B 8 1714 776 1508 683 1303 590 1714 776 1508 683 1303 590 9050 4100 289 131

No.

of

Fans

1 2 3 4 5 6 Total Unit

lb kg lb kg lb kg lb kg lb kg lb kg lb kg lb. kg

NOTE (1): Additional weight for copper coils is per mounting location.

(1) Copper

Fin Add

Table 3, Isolator Kit Numbers

AGZ

Model

Spring Kit

Part No. R-I-S Kit Part No.

026, 030

035

330349603 330349603 330349605 330349606 330349607 330349609 330349612 330349613 330349614 330349702 330349703 330349704 330349704 330349705 330349706 330349707 330349708 330349709

040, 045

050

055 060 065, 070

075, 085

090

100 110 120,130

Table 4, Isolator Locations

AGZ-B, Chillers

Operating Weight. Neoprene-In-Shear Mountings Spring-Flex Mountings

Unit Size

026B 030B 035B 040B 045B 050B 055B 060B 065B 070B 075B 085B 090B 100B 110B 120B 130B

NOTES:

1. Neoprene-in-shear isolators: Gray=RP-3 Gray, Black=RP-4 Black, Red=RP-4 Red.

lbs kg 3990 1807 4040 1830 4080 1848 4130 1871 4270 1934 4400 1993 4540 2057 4600 2084 4860 2202 4990 2260 6530 2958 6690 3031 6850 3103 7870 3565 8150 3692 8720 3950 9050 4100

1 2 3 4 5 6 1 2 3 4 5 6

Black Gray Gray Gray - - Orange Purple Purple Red - Black Gray Gray Gray - - Orange Purple Purple Red - Black Gray Gray Gray - - Orange Purple Purple Red - Black Gray Black Gray - - Orange Purple Purple Red - Black Gray Black Gray - - Orange Purple Purple Red - Black Gray Black Gray - - Orange Purple Purple Red - Black Black Black Gray - - Orange Purple Purple Purple - Black Black Black Gray - - Orange Purple Orange Purple - Black Black Black Black - - Orange Orange Orange Purple - Black Black Black Black - - Orange Orange Orange Purple - -

Red Black Red Black - - Gray Orange Gray Orange - Red Black Red Black - - Gray Orange Gray Orange - Red Black Red Black - - Gray Orange Gray Orange - -

Black Black Black Black Black Black Orange Orange Orange Orange Orange Orange

Red Black Black Red Black Black Green Orange Orange Green Orange Orange Red Red Black Red Red Black Green Green Orange Green Green Orange Red Red Black Red Red Black Green Green Orange Green Green Orange

IMM AGZ-7 AGZ 026B through 130B 13

Table 5, AGZ BM/BB, Isolator Loads At Each Mounting Location (With

Aluminum Fins)

AGZ-

BM/BB

Model

AGZ 026

AGZ 030

AGZ 035

AGZ 040

AGZ 045

AGZ 050

AGZ 055

AGZ 060

AGZ 065

AGZ 070

NOTE (1): Additional weight for copper coils is per mounting location.

Shipping

lbs 3550 3600 1227 901 849 623 3600 72

kg 1608 1631 556 408 385 282 1631 32

lbs 3550 3600 1227 901 849 623 3600 72

kg 1608 1631 556 408 385 282 1631 32

lbs 3550 3600 1227 901 849 623 3600 72

kg 1608 1631 556 408 385 282 1631 32

lbs 3550 3610 1261 872 873 604 3610 72

kg 1608 1635 571 395 395 274 1635 32

lbs 3590 3650 1275 881 883 611 3650 72

kg 1626 1653 578 399 400 277 1653 32

lbs 3730 3800 1295 951 896 658 3800 119

kg 1690 1721 587 431 406 298 1721 54

lbs 3780 3850 1303 1016 860 671 3850 119

kg 1712 1744 590 460 390 304 1744 54

lbs 3820 4040 1367 1066 903 704 4040 142

kg 1730 1830 619 483 409 319 1830 65

lbs 3970 4070 1305 1146 862 757 4070 142

kg 1798 1844 591 519 390 343 1844 65

lbs 4080 4180 1278 1192 885 825 4180 217

kg 1848 1894 579 540 401 374 1894 99

Wt

Operating.

Wt

Loc. 1 Loc. 2 Loc. 3 Loc. 4 Total

(1) Add’l for

Copper Fins

Table 6, Isolator Loads At Each Mounting Location (With Aluminum Fins)

AGZ-

BM/BB

Model

AGZ 075

AGZ 085

AGZ 090

AGZ 100

AGZ 110

AGZ 120

AGZ 130

NOTE (1): Additional weight for copper coils is per mounting location.

Shipping

lbs 5510 5630 1649 1166 1649 1166 - - 5630 217

kg 2496 2550 747 528 747 528 - - 2550 99

lbs 5670 5790 1734 1227 1657 1172 - - 5790 217

kg 2569 2623 786 556 751 531 - - 2623 99

lbs 5830 5950 1770 1205 1770 1205 - - 5950 217

kg 2641 2695 802 546 802 546 - - 2695 99

lbs 6820 6970 1323 1188 1053 1265 1135 1006 6970 289

kg 3089 3157 599 538 477 573 514 456 3157 131

lbs 7080 7230 1396 1205 1014 1396 1205 1014 7230 289

kg 3207 3275 632 546 459 632 546 459 3275 131

lbs 7360 7480 1477 1275 1073 1411 1218 1026 7480 289

kg 3334 3388 669 578 486 639 552 465 3388 131

lbs 7640 7760 1555 1293 1032 1555 1293 1032 7760 289

kg 3461 3515 704 586 467 704 586 467 3515 131

Wt.

Operating

Wt.

Loc 1 Loc 2 Loc 3 Loc 4 Loc 5 Loc 6 TOTAL

(1) Add’l for

Copper Fins

Table 7, Isolator Kit Part Numbers

AGZ-BM Model 026 - 035 040 - 060 065 070 075 - 090 100, 110 120, 130

Spring Kit Part No.

R-I-S Kit Part No.

330349601 330349602 330349603 330349604 330349608 330349610 330349611 330349701 330349701 330349703 330349703 330349706 330349707 330349708

14 AGZ 026B through 130B IMM AGZ-7

Table 8,AGZ BM/BB, Isolator Locations

ACZ-BS, AGZ-BM Less Evaporator Units

AGZ-

BM/BB

Model

026 030 035 040 045 050 055 060 065 070 075 085 090 100 110 120 130

NOTE (1): Position #4 is a CP-1, single spring isolator for A CZ 030 to 065 and AGZ 026 to 060. All

Operating

Weight

lbs kg 1 2 3 4 5 6 1 2 3 4 (1) 5 6

3600 1631 Black Gray Gray Green - - Orange Purple Red Orange 3600 1631 Black Gray Gray Green - - Orange Purple Red Orange - 3600 1631 Black Gray Gray Green - - Orange Purple Red Orange - 3610 1635 Black Gray Gray Green - - Orange Purple Purple Orange - 3650 1653 Black Gray Gray Green - - Orange Purple Purple Orange - 3800 1721 Black Gray Gray Green - - Orange Purple Purple Orange - 3850 1744 Black Gray Gray Green - - Orange Purple Purple Orange - 4040 1830 Black Gray Gray Green - - Orange Purple Purple Orange - 4070 1844 Black Black Gray Gray - - Orange Purple Purple Red - 4180 1894 Black Black Gray Gray - - Orange Orange Purple Red - 5630 2550 Red Black Red Black - - Green Orange Green Orange - 5790 2623 Red Black Red Black - - Green Orange Green Orange - 5950 2695 Red Black Red Black - - Green Orange Green Orange - 6970 3157 Black Black Black Black Black Black Orange Orange Purple Orange Orange Purple 7230 3275 Black Black Black Black Black Black Orange Orange Purple Orange Orange Purple 7480 3388 Red Black Black Red Black Black Green Orange Purple Green Orange Purple 7760 3515 Red Black Black Red Black Black Green Orange Purple Green Orange Purple

others are CP-2, two

Neoprene-In-Shear Mountings Spring-Flex Mountings

spring.

Ambient Air Temperature Limitations

Standard/High A mbient Panels

Models AGZ-B (26 to 130 tons, two circuit) have electrical data and subsequent field wiring requirements that are tailored to individual applications.

There are many installations where the expected summer ambient air temperatures will be at 105°F (40.1°C) or less, resulting in smaller unit electrical requirements compared to operation at 106°F (41.1) and above. In these lower temperature cases, there can be considerable installation cost savings by using smaller and more appropriate electrical service.

Therefore, the AGZ electrical data is divided into two classifications based on the design ambient temperature where the unit will operate. Standard Ambient unit electrical data (BS and BM models) is for operation in ambient temperatures of 105°F (40.1°C) or less. Units with the High Ambient designation (BH and BB models) are for use above 105°F (40.1°C) to 125°F (51.7°C).

The AGZ-B units for high ambient operation require the addition of the High Ambient Control Panel Option, which includes the addition of a small fan with a filter in the air intake to cool the control panel, and a unit nameplate that lists the larger electrical requirements.

All units with the optional VFD low ambient fan control automatically include the High Ambient Control Panel Option. Operation of the VFD generates a quantity of panel heat best removed by use of a control panel fan.

IMM AGZ-7 AGZ 026B through 130B 15

Winter Operation Temperatures

0°F to 34°F 35°F and Above

Fan Control Optional VFD (1) Standard FanTrol (2) Design Ambient Air T emperature

Electrical Data (3)

≤105°F >106°F ≤105°F >106°F

Standard

Ambient

High

Ambient

Standard Ambient

High

Ambient

Panel Fan Required (4) Yes Yes No Yes Model Designator (5)

Packaged BS BH BS BH Remote Evaporator BM BB BM BB

NOTES

1. VF D is variable spe ed, fan control through the Micro Tech Ii controller.

2. FanTrol is fan cycling off discharge pressure.

3. Standard Ambient electrical data begins on page 36, High Ambient data begins on page 46.

4. The VFD option automatically includes the factory-installed panel fan and filter set

5. The designator is the last two characters in the model number, i.e. AGZ 100BS.

Panel Ratings

Voltage

208-230

240

380-460

575

Standard

Standard Options

Panel

Optional

VFD

High Short Circuit

Panel (kA)

High Interrupt Panel w/

Disconnect Swt. (kA)

35 5 120 120 35 5 100 100 35 5 65 65

5 5 25 25

Water Flow Limitations, Constant Flow

The evaporator flow rates and pressure drops shown on page 25 are for full load design purposes. The maximum flow rate and pressure drop are based on a 6-degree temperature drop. Avoid higher flow rates with resulting lower temperature drops to prevent potential control problems resulting from very small control bands and limited start up/shut off temperature changes.

The minimum flow and pressure drop is based on a full load evaporator temperature drop of 16-degrees.

Evaporator flow rates below the minimum values can result in laminar flow causing freeze-up problems, scaling and poor control. Flow rates above the maximum values will result in unacceptable pressure drops and can cause excessive erosion, potentially leading to failure.

Water Flow Limitations, Variable Flow

The full load, minimum flow limitation for constant flow is not to be confused with the part load minimum flow rate that must be maintained for chillers operating in primary variable flow pumping systems. As chiller capacity drops, the flow rate for this pumping system will reduce proportionally. See the following table for the part load minimum flow rates.

Other design practices for variable flow systems requiring a range of evaporator flow rates can be found below.

16 AGZ 026B through 130B IMM AGZ-7

These minimum flow rates assume that flow will be reduced proportionally to the cooling load.

Table 9, Minimum Part Load Flow Rates

AGZ Model 010 013 017 020 025 029 034 026 030 035 040 045

Minimum Part

Load Flow (GPM)

AGZ Model 050 055 060 065 070 075 085 090 100 110 120 130

Minimum Part

Load Flow (GPM)

10 13 15 20 22 27 33 26 29 32 37 41

45 50 55 59 63 71 119 128 146 161 180 194

Variable Speed Pumping

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 ma xi mum fl o w r at es f or t he ves s el are not exceeded.

The recommended maximum change in water flow is 10 percent of the change per minute.

The water flow through the vessel must remain above the values listed on Table 9. If flow drops below the minimum allowable, large reductions in heat transfer can occur.

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. The following issues must be considered when designing and installing water piping:

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

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

3. Manual or automatic air vent valves at the high points of the system. Drains must be installed at the lowest points in the system.

4. Adequate water pressure must be maintained (expansion tank or regulating valve).

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

6. A strainer or other means of removing foreign matter from the water before it enters the pump must prevent cavitation at the pump inlet (consult pump manufacturer for recommendations). The use of a strainer will prolong pump life and keep system performance up.

7. Flush the system water piping thoroughly before making connections to the unit evaporator. Be sure to install a strainer (40-mesh for models AGZ 010 through 070 and 20-mesh for AGZ 075 through 130) in the return water line before the inlet to the chiller. Design the water piping so the chilled water circulating pump discharges into the evaporator inlet.

8. The unit’s evaporator has a thermostat and heater to prevent freeze-up down to 20°F (-29°C). The heating cable can be wired to a separate 115V supply circuit. 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.

be installed. Place the strainer far enough upstream to

IMM AGZ-7 AGZ 026B through 130B 17

CAUTION

If separate disconnect is used for the 115V supply to the evaporator heating

cable, mark the disconnect clearly to ensure the disconnect is not accidentally

shut off during cold seasons causing a possible damaging evaporator freeze-up.

9. If the unit is used as a replacement chiller, flush the system thoroughly before unit installation. Regular water analysis and chemical water 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 “onoff” cycling. Turnover rate should not be less than 4 minutes for normal variable cooling loads.

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. When Glycol or Ice are selected as Unit Mode, the MicroTech II will automatically reset the available range for the Leaving Water Temperature, Freezestat and Evaporator Pressure settings.

12. 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.

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

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

Figure 16, AGZ 075 – AGZ 130, Typical Field Evaporator Water Piping

THERMOWELL

T

INLET

T

18 AGZ 026B through 130B IMM AGZ-7

Figure 17, AGZ 026 - AGZ 070, Typical Field Evaporator Water Piping

Air

T

Inlet

Outlet

T

Thermowell

Vent

P

Drain

Vibration

Eliminators

40-Mesh Strainer

Isolation

Valves

Flow

Switch

NOTE: Outdoor piping must be protected if freezing temperatures are a possibility.

Flow Switch

Mount a water flow switch in the leaving water line to shut down the unit when water flow is interrupted. A flow switch is an equipment protection control and should never be used to cycle a unit.

A “paddle” type flow switch is available from McQuay (part number 017503300). Certain minimum flow rates are required to close the switch and are listed in Table 10 on page 19.

Installation should be as shown in Figure 18. Connect the normally open contacts of the flow switch in the unit control center at terminals 44 and 61. 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. Manufacturer’s instructions included with the switch should be followed.

NOTE: Differential pressure switches are not recommended for outdoor installation. They can freeze and not indicate a no-flow condition.

Table 10, Flow Switch Minimum/Maximum Flow Rat es

Nominal Pipe Size

Inches (mm)

2 (50.8) 13.7 (51.8) 105 (397.4)

2 1/2 (63.50 17.9 (67.8) 149 (564.0)

3 (76.20 24.2 (91.6) 230 (870.6) 4 (101.6) 35.3 (134.0) 397 (1502.7) 5 (127.0) 48.6 (184.0) 654 (2475.4) 6 (152.4) 60.3 (228.0) 900 (3406.5)

Note: See pressure drop table on page 21 for minimum and maxim um flow through the evaporator.

Minimum Required Flow To

Activate Switch - gpm (l/m)

Maximum Safe Flow Rate

gpm (l/m)

Figure 18, Flow Switch Instal lation

Flow direction marked on switch

1" (25mm) NPT flow switch

connection

Tee

IMM AGZ-7 AGZ 026B through 130B 19

Water Connections

T

D

Bring water piping to the evaporator through the side between the vertical supports. Provide taps for the connection of pressure gauges and thermometers in the inlet and outlet lines. Check the inlet and outlet labels on the unit against the certified drawings supplied on the job and be sure the water piping is hooked up correctly. Contact the McQuay sales office if any discrepancies exist.

System Water Volume Considerations

All chillers need adequate time to recognize a load change, respond to the change and stabilize without short cycling the compressor. The water volume in the system and the size of the piping loop is a critical consideration. Good engineering practice is to have a minimum water volume of four times the flow rate (GPM) for comfort cooling applications. For process applications where the load can change quickly, contact the local McQuay sales office for recommendations. A water storage tank (provided by others) may be required to increase the system water volume in some systems.

Since there are many other factors that can influence performance, systems can successfully operate below these suggestions. However, as the water volume decreases below these suggestions, the possibility of problems increases. We believe that these guidelines should be an industry standard and not just recommendations from McQuay.

Variable Speed Pumping

Variable water flow involves reducing the water flow through the evaporator as the load decreases. McQuay chillers are designed for this duty provided that the rate of change in water flow is not greater than 10 percent of the change per minute.

The water flow through the vessel must remain above the values shown on Table 9 on page 17. If flow drops below the minimum allowable, large reductions in heat transfer can occur.

Glycol Solutions

The use of a glycol/water mixture in the evaporator to prevent freezing will reduce system capacity and efficiency, as well as increase pressure drop. The system capacity, required glycol solution flow rate, and pressure drop with glycol may be calculated using the following formulas and tables.

1. Capacity – Multiply the capacity based on water by the Capacity correction factor

from Table 11 through Table 14.

2. Flow – Multiply the water evaporator flow by the Flow correction factor from

Table 11 through Table 14 to determine the increased evaporator flow due to glycol.

If the flow is unknown, it can be calculated from the following equation:

)(24

×

=

CapacitykW

elta

18.4

−×

For Metric Applications

(gpm) Flow Glycol FactorCorrectionFlow

– Use the following equation for metric applications:

=

(l/s) Flow Glycol

3. Pressure drop -- Multiply the water pressure drop from page 25 by Pressure Drop

correction factor from Table 11 through Table 14. High concentrations of propylene glycol at low temperatures may cause unacceptably high pressure drops.

4. Power -- Multiply the water system power by Power correction factor from Table

11 through Table 14.

glycolCapacityTons

TDelta

−

×

FactorCorrectionFlow

)

20 AGZ 026B through 130B IMM AGZ-7

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. It is recommended that a minimum of 25% solution by weight be used for protection against corrosion or that additional compatible inhibitors be added.

Concentrations above 35 percent do not provide any additional burst protection and should be carefully considered before using.

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 11, Et hyl ene Glycol Factors for Models AGZ 026B to 070B

% E.G.

10 26 -3.3 0.998 0.998 1.036 1.097 20 18 -7.8 0.993 0.997 1.060 1.226 30 7 -13.9 0.987 0.995 1.092 1.369 40 -7 -21.7 0.980 0.992 1.132 1.557 50

Freeze Point

o

F

-28 -33.3 0.973 0.991 1.182 1.791

o

C

Capacity Power Flow PD

Table 12, Propylene Glycol Factors for Models AGZ 026B to 070B

% P.G.

10 26 -3.3 0.995 0.997 1.016 1.100 20 19 -7.2 0.987 0.995 1.032 1.211 30 9 -12.8 0.978 0.992 1.057 1.380 40 -5 -20.6 0.964 0.987 1.092 1.703 50

Freeze Point

o

F

-27 -32.8 0.952 0.983 1.140 2.251

o

C

Capacity Power Flow PD

Table 13, Ethylene Glycol Factors for Models AGZ 075B to 130B

% E.G.

10 26 -3.3 0.994 0.998 1.038 1.101 20 18 -7.8 0.982 0.995 1.063 1.224 30 7 -13.9 0.970 0.992 1.095 1.358 40 -7 -21.7 0.955 0.987 1.134 1.536 50

Freeze Point

o

F

-28 -33.3 0.939 0.983 1.184 1.755

o

C

Capacity Power Flow PD

Table 14, Propylene Glycol Factors for Models AGZ 075B to 130B

% P.G.

10 26 -3.3 0.988 0.996 1.019 1.097 20 19 -7.2 0.972 0.992 1.035 1.201 30 9 -12.8 0.951 0.987 1.059 1.351 40 -5 -20.6 0.926 0.979 1.095 1.598 50

Freeze Point

o

F

-27 -32.8 0.906 0.974 1.142 2.039

o

C

Capacity Power Flow PD

IMM AGZ-7 AGZ 026B through 130B 21

Altitude Correction Factors

Performance tables are based at sea level. Elevations other than sea level affect the performance of the unit. The decreased air density will reduce condenser capacity consequently reducing the unit's performance. For performance at elevations other than sea level, refer to Table 15 or Table 16.

Evaporator Temperature Drop Factors

Performance tables are based on a 10-degree F (5-degree C) temperature drop through the evaporator. Adjustment factors for applications with temperature ranges from 6 to 16-degree F (3.3 to 8.9-degree C) are in Table 15 or Table 16.

Temperature drops outside this 6 to 16-degree F (3.3 to 8.9-degree C) range can affect the control system's capability to maintain acceptable control and are not recommended.

The maximum water temperature that can be circulated through the evaporator in a non-operating mode is 100°F (37.8°C).

Fouling Factor

Performance tables are based on water with a fouling factor of

As fouling is increased, performance decreases. For performance at other than 0.0001 (0.0176) fouling factor, refer to Table 15 or Table 16.

Foreign matter in the chilled water system will adversely affect the heat transfer capability of the evaporator and could increase the pressure drop and reduce the water flow. Maintain proper water treatment to provide optimum unit operation.

22

)/0176.0(/0001.0

kWCmorBTUFhrft °×°×× per ARI 550/590-98.

Table 15, Capacity and Power Derates, Models AGZ 026B to 070B

Fouling Factor

Altitude

Sea

Level

2000 feet

610 meters

4000 feet

1220 meters

6000 feet

1830 meters

Chilled Water

Delta T

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

6 3.3 0.978 0.993 0.975 0.991 0.963 0.987 0.940 0.980

8 4.4 0.989 0.996 0.986 0.994 0.973 0.990 0.950 0.983 10 5.6 1.000 1.000 0.996 0.999 0.984 0.994 0.961 0.987 12 6.7 1.009 1.003 1.005 1.001 0.993 0.997 0.969 0.990 14 7.7 1.018 1.004 1.014 1.003 1.002 0.999 0.978 0.991 16 8.9 1.025 1.007 1.021 1.006 1.009 1.001 0.985 0.994

6 3.3 0.977 1.001 0.973 1.000 0.961 0.996 0.938 0.989

8 4.4 0.987 1.006 0.984 1.004 0.971 1.000 0.948 0.993 10 5.6 0.998 1.009 0.995 1.007 0.982 1.003 0.959 0.996 12 6.7 1.007 1.011 1.004 1.010 0.991 1.006 0.967 0.998 14 7.7 1.014 1.014 1.011 1.013 0.998 1.009 0.974 1.001 16 8.9 1.022 1.016 1.018 1.014 1.005 1.010 0.981 1.003

6 3.3 0.973 1.011 0.970 1.010 0.957 1.006 0.935 0.998

8 4.4 0.984 1.014 0.980 1.013 0.968 1.009 0.945 1.001 10 5.6 0.995 1.019 0.991 1.017 0.979 1.013 0.955 1.005 12 6.7 1.004 1.021 1.000 1.020 0.987 1.016 0.964 1.008 14 7.7 1.011 1.024 1.007 1.023 0.994 1.018 0.971 1.011 16 8.9 1.018 1.027 1.014 1.026 1.002 1.021 0.978 1.014

6 3.3 0.969 1.021 0.966 1.020 0.954 1.016 0.931 1.008

8 4.4 0.980 1.026 0.977 1.024 0.964 1.020 0.942 1.013 10 5.6 0.989 1.029 0.986 1.027 0.973 1.023 0.950 1.015 12 6.7 0.998 1.033 0.995 1.031 0.982 1.027 0.959 1.020 14 7.7 1.007 1.036 1.004 1.034 0.991 1.030 0.967 1.022 16 8.9 1.014 1.037 1.011 1.036 0.998 1.031 0.974 1.024

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

22 AGZ 026B through 130B IMM AGZ-7

Table 16, Capacity and Power Derates, Models AGZ 075B to 130B

Fouling Factor

Altitude

Sea

Level

2000 feet

610 meters

4000 feet

1220 meters

6000 feet

1830 meters

Chilled Water

Delta T

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

6 3.3 0.990 0.997 0.976 0.994 0.937 0.983 0.868 0.964

8 4.4 0.994 0.998 0.981 0.995 0.942 0.984 0.872 0.965 10 5.6 1.000 1.000 0.987 0.996 0.947 0.986 0.877 0.967 12 6.7 1.005 1.001 0.991 0.997 0.951 0.986 0.881 0.968 14 7.7 1.009 1.002 0.995 0.998 0.955 0.987 0.884 0.968 16 8.9 1.013 1.004 1.000 1.000 0.960 0.989 0.889 0.970

6 3.3 0.987 1.005 0.974 1.002 0.934 0.991 0.865 0.972

8 4.4 0.992 1.006 0.979 1.003 0.940 0.992 0.870 0.973 10 5.6 0.997 1.008 0.984 1.004 0.944 0.994 0.875 0.975 12 6.7 1.002 1.009 0.989 1.005 0.949 0.994 0.879 0.975 14 7.7 1.007 1.011 0.993 1.007 0.953 0.996 0.883 0.977 16 8.9 1.011 1.012 0.998 1.008 0.958 0.997 0.887 0.978

6 3.3 0.985 1.014 0.972 1.010 0.933 0.999 0.864 0.980

8 4.4 0.991 1.015 0.977 1.012 0.938 1.001 0.869 0.981 10 5.6 0.995 1.016 0.982 1.013 0.943 1.002 0.873 0.982 12 6.7 1.000 1.018 0.987 1.014 0.947 1.003 0.877 0.984 14 6.8 1.005 1.019 0.991 1.015 0.951 1.004 0.881 0.985 16 8.9 1.009 1.021 0.995 1.017 0.955 1.006 0.884 0.987

6 3.3 0.982 1.023 0.969 1.020 0.930 1.009 0.861 0.989

8 4.4 0.988 1.025 0.975 1.022 0.935 1.010 0.866 0.991 10 5.6 0.992 1.026 0.979 1.022 0.940 1.011 0.870 0.992 12 6.7 0.997 1.028 0.984 1.024 0.944 1.013 0.875 0.994 14 7.7 1.002 1.029 0.989 1.025 0.949 1.014 0.879 0.995 16 8.9 1.006 1.031 0.992 1.027 0.952 1.016 0.882 0.996

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

Evaporator Freeze Protection

Evaporator freeze-up can be a concern in the application of air-cooled water chillers. To protect against freeze-up, insulation and an electric heater cable are furnished with the unit. This protects the evaporator down to -20°F (-29°C) ambient air temperature. Although the evaporator is equipped with freeze protection, it does not protect water piping external to the unit or the evaporator itself if there is a power failure or heater cable burnout. Consider the following recommendations for additional protection.

1. If the unit will not be operated during the winter, drain evaporator and chilled water piping and flush with glycol. Drain and vent connections are provided on the evaporator to ease draining.

2. Add a glycol solution to the chilled water system to provide freeze protection. Freeze point should be approximately ten degrees below minimum design ambient temperature.

3. The addition of thermostatically controlled heat and insulation to exposed piping.

4. Continuous circulation of water through the chilled water piping and evaporator. The evaporator heater cable is factory wired to the 115-volt circuit in the control box. This power

should be supplied from a separate source, but it can be supplied from the control circuit. Operation of the heater cable is automatic through the ambient sensing thermostat that energizes the evaporator heater cable for protection against freeze-up. Unless the evaporator is drained in the winter, the disconnect switch to the evaporator heater must not be open.

IMM AGZ-7 AGZ 026B through 130B 23

Operating/Standby Limits

Maximum standby ambient air temperature, 130°F (55°C) Maximum operating ambient air temperature

Standard Ambient Unit, 105°F (40.6°C) and below, Models BS and BM High Ambient Unit, above 105°F (40.6°C) to 125°F 51.7°C), Models BH and BB

Minimum operating ambient temperature (standard), 35°F (2°C) Minimum operating temperature (with optional low-ambient control), 0°F (-18°C) Leaving chilled water temperature, 40°F to 60°F (4.4°C to 15.6°C) Leaving chilled fluid temperatures (with anti-freeze), 20°F to 60°F (-7°C to 16°C) Design chilled water Delta-T range, 6 degrees F to 16 degrees F (3.3 degrees C to 8.9

degrees C) Part load minimum flow for variable flow systems; varies with unit size, see below Maximum operating inlet fluid temperature, 76°F (24°C) Maximum non-operating inlet fluid temperature, 100°F (38°C) Electric power supply, see page 52

Evaporator Flow and Pressure Drop Water Flow Limitations

The evaporator flow rates and pressure drops shown on page 25 are for full load, constant flow design purposes.

See the page 16 for the part load minimum flow rates. Other design practices for variable flow systems requiring a range of evaporator flow rates can be found on page

20.

24 AGZ 026B through 130B IMM AGZ-7

Figure 19, AGZ 026B – 130B, Evaporator Pressure Drop

040

045

050

055

026-030

065-070

035

075-085-090

120-130

060

100-110

AGZ Unit

Model

026B 41 1.6 2.6 4.7 65 3.9 4.1 11.6 109 10.4 6.9 30.9 030B 45 1.9 2.9 5.7 72 4.7 4.6 14.1 121 12.7 7.6 37.8 035B 50 1.9 3.1 5.6 80 4.6 5.0 13.8 133 12.4 8.4 36.9 040B 58 1.9 3.6 5.7 92 4.7 5.8 14.0 154 12.6 9.7 37.5 045B 64 1.8 4.0 5.4 102 4.5 6.4 13.4 170 12.1 10.7 35.9 050B 71 1.8 4.4 5.4 113 4.5 7.1 13.3 188 12.0 11.9 35.7 055B 78 1.8 4.9 5.3 125 4.4 7.9 13.0 209 11.7 13.2 34.8 060B 86 1.7 5.4 5.2 137 4.3 8.6 12.8 228 11.5 14.4 34.2 065B 92 1.6 5.8 4.9 147 4.1 9.3 12.1 246 10.9 15.5 32.5 070B 98 1.9 6.2 5.6 157 4.6 9.9 13.7 262 12.3 16.5 36.8 075B 111 5.6 7.0 16.5 177 12.5 11.2 37.4 295 30.4 18.6 90.7 085B 119 6.3 7.5 18.9 191 14.3 12.1 42.7 318 34.8 20.1 103.6 090B 128 7.2 8.1 21.4 205 16.2 12.9 48.4 342 39.4 21.6 117.3 100B 146 2.6 9.2 7.7 234 6.1 14.8 18.2 390 15.5 24.6 46.2 110B 161 3.1 10.2 9.2 258 7.3 16.3 21.7 430 18.5 27.1 55.1 120B 180 3.5 11.3 10.4 288 8.9 18.1 26.5 479 24.6 30.2 73.4 130B 194 4.1 12.2 12.1 311 10.4 19.6 30.9 518 28.7 32.7 85.6

NOTE: Minimum and maxim um flows provide a Delta-T for each unit size within a 6 - 16°F range for proper control.

Inch-Pound S.I. Inch-Pound S.I. Inch-Pound S.I.

gpm DP ft. lps DP kpa gpm DP ft. lps DP kpa gpm DP ft. lps DP kpa

IMM AGZ-7 AGZ 026B through 130B 25

Minimum Nominal Maximum

Wind Baffles and Hail Guards

G

A

.

Protection against negative effects from wind and protection against fin damage from hail can be achieved from two separate options from McQuay. Factory or field installed louvers are available as well as the box-type enclosures described below.

Wind Baffles/Hail Guards are a field installed option that are used to stabilize unit operation in high wind areas and to assist in operation at low ambient temperatures. Figure 20 is a sketch of a typical panel assembly on an AGZ unit. The actual number of panels and parts will vary by model size. The parts are shown in the table below and referenced by balloon numbers.

Figure 20, Installation Sequence

Rib Att achment (First)

RIB FLANGES ON THE END

MUST POINT TO CENTER OF COIL TO HAVE A FINISHED LOOK. INTERIOR RIB FLANGES

CAN POINT IN ANY DIRECTION.

U

I

R

E

N

T

C

V

O

I

L

C

L

A

Front Panel Attachment (Second)

PLACE FRONT "A" AND FASTEN TO BOTH SIDES

C

O

L

I

C

I

A

L

V

E

R

U

T

N

T

I

C

B

2

A

1

3

Top Panel Attachment (Last)

ATTACH TOP "A" AT HORIZONTAL COIL CHANNEL FIRST.

THIS WILL SQUARE THE PANEL.

OVERLAP THE FRONT PANEL FLANGE.

A

C

I

T

U

R

N

E

T

V

I

O

L

I

C

L

ATTACH ALL RIBS TO COIL VERTICAL CHANNELS.

E

D

PLACE FRONT "B" BY LAPPIN OVER "A" AND REPEAT ATTACHMENT PROCEDURE.

E

D

C

B

A

ATTACH LEFT SIDE SECOND.

LAP PANEL "B" OVER PANEL "A"

ND REPEAT ATTACHMENT PROCEDURE

26 AGZ 026B through 130B IMM AGZ-7

Table 17, Packing List

L

O

t

Description Part Number Bubble Number

Vertical Support Rib 074758501 1

Top Cover 330409401 2

¼ - 20 x ½” Screw (Place in Poly Bag) 046093807

Front Panel 330409501 3

Figure 21, Components

Top Panel, Install Last

Overlap the Front panel

T

REAR (AGAINST UNIT)

VERTICAL SUPPORT RIB TOP COVER FRONT PANE

P

Front Panel, Install Second

Rib, Install Firs

IMM AGZ-7 AGZ 026B through 130B 27

Optional Features

Controls

Hot Gas Bypass

Hot gas bypass permits unit operation down to 10% of full load capacity. This option includes a factory-mounted hot gas bypass valve, solenoid valve, and manual shutoff valve for each circuit. See page 61 for further information.

Head Pressure Control

Optional fan VFD control allows unit operation down to 0°F (-18°C). (Not available on 380 volt, 60 Hertz units.)

Water Flow Switch

(P/N 017503300) A water flow switch is available for field installation in the chilled water piping to avoid evaporator freeze-up under low or no flow conditions. Terminals are provided in the unit control center for field hook-up of the water flow switch. If this option is not ordered with the unit, then a field supplied water flow switch must be installed.

Alarm Bell

Bell for field installation and wiring to the control panel to provide remote indication of unit alarm condition. See Field Wiring Diagram for connection locations.

BAS Interface

Optional Protocol Selectability™, connection to the chiller for all building automation systems (BAS) protocols will be at the unit controller. An interface module, depending on the protocol being used, may have been factory-installed in the unit controller (or it can be field installed).

Protocols Supported

Table 18, Standard Protocol Data

Protocol Physical Layer Data Rate Controller Other

BACnet®/IP or

BACnet/Ethernet

BACnet MSTP RS-485 LONWORKS®

Modbus RTU RS-485 or RS-232

The interface kits on the MicroTech II controller are as follows:

• BACnet Kit P/N 350147404: BACnet/IP, BACnet MS/TP, or BACnet Ethernet

• LONWORKS Kit P/N 350147401: LonTalk (FTT-10A)

• Modbus: Modbus RTU

Optional Protocol Selectability BAS interfaces. The locations and interconnection requirements for the various standard protocols are found in their respective installation manuals.

Ethernet 10 Base-T 10 Megabits/sec

9600, 19200 or

38400 bits/sec

FTT-10A 78kbits/sec

9600 or 19200

bits/sec

MicroTech II MicroTech II

Reference ED 15062 Reference ED 15062

Reference ED 15062 Reference ED 15063

Modbus IM 743 L

ONWORKS IM 735 BACnet IM 736

Referenced documents may be obtained from the local McQuay sales office, from the local McQuayService office, or from the McQuay Technical Response Center, located in Staunton, Virginia (540-248-0711).

28 AGZ 026B through 130B IMM AGZ-7

These documents can also be found on www.mcquay.com under Product Information > (chiller type) > Control Integration.

®™ The following are trademarks or registered trademarks of their respective companies: BACnet from the American Society of Heating, Refrigerating and AirConditioning Engineers, Inc., LonTalk, LONMARK and LONWORKS from Echelon Corporation, and Modbus and Modbus RTU from Schneider Electric.

Remote Operator Interface Panel

The box containing the optional remote interface panel will have installation instructions, IOM- MT II Remote, in it. The manual is also available for downloading from www.mcquay.com.

Unit

Vibration Isolators

Spring or rubber-in-shear vibration isolators are available for field installation to reduce vibration transmission through the unit base. See page 12 for detailed information on their installation.

Protective Base Guards

Optional factory-installed, vinyl-coated welded wire base guards provide all-around lower unit protection on ground level installations. Coil guards are standard.

Copper Fin Condenser Coils

Copper fin condenser coils are available as an option on all models.

Black Fin Coils

Aluminum fin stock precoated with a phenolic coating with 1000 hour salt spray resistance (ASTM B117-90).

Coated Fins

Copper or aluminum fins coated with ElectroFin® baked epoxy protective coating with 3000+ hour salt spray resistance (ASTM B117-90).

Evaporator Insulation

Double insulation thickness (total of 1½ inches) for high humidity areas or low fluid temperatures.

Sound Reduction

Acoustical blankets are factory-installed on each compressor.

Hail and Wind Guards

A field-mounted option that is shipped as a kit including panels, fasteners, and instructions. See page 26 for further information.

Louvers

Upper and/or lower, factory mounted or field installed louver panels that protect from hail damage, help stabilize operation in high wind conditions and provide a uniform, enhanced appearance.

Shut-off Valves

Factory-mounted suction and discharge shut-off valves, liquid line shutoff valve is standard.

IMM AGZ-7 AGZ 026B through 130B 29

Electrical

Multi-Point Electrical Connection

Provides a power connection to each of the unit’s two electrical circuits.

Disconnect Switch with Through-the-Door Handle

A factory or field-installed option for service use, nonfused disconnect switch (mounted inside the power section of the control box) with a through-the-door handle is available with single and multi-point power supply.

Phase Loss/Voltage Protection

Phase loss with under/over voltage protection and multiple LED indication of fault type is available as a factory-installed option to guard against compressor motor burnout.

Convenience Outlet

10.0 amp, 115-volt outlet located in control panel to provide power for servicing unit.

Ground Fault Protection

Protects equipment from damage from line-to-ground fault currents less than those required for conductor protection.

High Short Circuit Current Protection

Provides control panel protection against short circuit currents per the following table:

Voltage 208 240 460 600 Current (kA) 120 100 65 25

High Ambient Control Panel

Consists of exhaust fan with rain hood, two inlet screens with filters, necessary controls and wiring to allow operation to 125°F. The option can be factory or field installed as a kit.:

• It is automatically included on any unit with the fan VFD (low ambient option)

• It is required on any unit operating above 105°F (40.1°C).

30 AGZ 026B through 130B IMM AGZ-7

Physical Data

AGZ-BS/BH

Table 19, AGZ 026BS/BH through 035BS/BH

PHYSICAL DATA

BASIC DATA

Unit Capacity @ ARI (1), Tons (kW) 27.2 (95.4) 30.2 (106.3) 33.2 (117.2) Number Of Refrigerant Circuits 2 2 2 Unit Operating Charge, R-22, Lbs. 22 22 22 27 27 27 Unit Operating Charge, R-22, (kg) 10 10 10 12 12 12 Cabinet Dimensions, LxWxH, In. 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4 Cabinet Dimensions, LxWxH, (mm) 2398 x 2235 x 2550 2398 x 2235 x 2550 2398 x 2235 x 2550 Unit Operating Weight, Lb (kg) 3990 (1811) 4040 (1834) 4080 (1852) Unit Shipping Wei ght, Lb (kg) 39501793) 3990 (1811) 4030 (1830) Add'l Weight If Copper Finned Coils, Lb (kg) 284 (129) 284 (129) 284 (129)

COMPRESSORS

Type Tandem Scrolls Tandem Scrolls Tandem Scrolls Nominal tonnage of each Com pressor 7.5 7.5 7.5 9. 0 9.0 9.0 Number Of Compressors per Circuit 2 2 2 2 2 2 Oil Charge Per Compressor, Oz. 140 140 140 140 140 140 Oil Charge Per Compressor, (g) (496) (496) (496) (496) (496) (496)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Staging, 4 Stages, Circuit #1 in Lead 0-25-50-75-100 0-23-50-73-100 0-25-50-75-100 Staging, 4 Stages, Circuit #2 in Lead 0-25-50-75-100 0-27-50-77-100 0-25-50-75-100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area Sq. Ft. 26.3 26.3 26.3 26.3 26.3 26.3 Coil Face Area, (M2) 2.4 2.4 2.4 2.4 2.4 2.4 Finned Height x Finned Length, In. 50x75.6 50x75.6 50x75.6 50x75.6 50x75.6 50x75.6

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

Pumpdown Capacity, 90% Full Lbs . (kg) 49 (22) 49 (22) 49 (22) 49 (22) 49 (22) 49 (22) Maximum Relief Valve Pressure Setting,

psig (kPa)

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

Number Of Fans - Fan Diameter, In. (mm) 4 – 30 (762) 4 – 30 (762) 4 – 30 (762) Number Of Motors - HP (kW) (2) 4 – 1.5 4 – 1.5 4 – 1.5 Fan And Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, FPM (M/Sec) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, CFM (M3/sec) 24,316 (11,478) 24,316 (11,478) 24,316 (11,478)

EVAPORATOR - BRAZED PLATE-TO-PLATE

Number of Evaporators 1 1 1 Number of Refrigerant Circuits 2 2 2 Water Volume, Gallons, (L) 4.3 (16.4) 5.0 (18.9) 5.7 (21.4) Maximum Water P ressure, psig (kPa) 363 (2503) 363 (2503) 363 (2503) Max. Refrig. Working Pressure, psig (kPa) 450 (3102) 450 (3102) 450 (3102) Water Inlet / Outlet Victaulic Conn. In. (mm) 3 (76) 3 (76) 3 (76) Drain - NPT int, In. (mm) Field Fi el d Field Vent - NPT int, In. (mm) Field Field Field NOTES:

1. Nominal c apacit y bas ed on 95°F ambient air and 54°F/44°F water range.

2. Except for 380V/60 & 575V/60, HP = 2.0

AGZ MODEL NUMBER

026B 030B 035B

Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2

1270 x

1920

450

(3103)

1270 x

1920

450

(3103)

1270 x

1920

450

(3103)

1270 x

1920

450

(3103)

1270 x

1920

450

(3103)

1270 x

1920

450

(3103)

IMM AGZ-7 AGZ 026B through 130B 31

Table 20, AGZ 040BS/BH through 055BS/BH

PHYSICAL DATA

BASIC DATA

Unit Capacity @ ARI Conditions (1), Tons (kW) 38.5 (135.5) 42.5 (149.6) 47. 0 (165. 4) 52.2 (183.7) Number Of Refrigerant Circuits 2 2 2 2 Unit Operating Charge, R-22, lbs. 31 31 38 38 38 38 46 46 Unit Operating Charge, R-22, (kg) (14) (14) (17) (17) (17) (17) (21) (21) Cabinet Dimensions, LxWxH, in. 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4

Cabinet Dimensions, LxWxH, (mm) Unit Operating Weight, Lbs. (kg) 4130 (1875) 4270 (1939) 4400 (1998) 4540 (2061)

Unit Shipping Wei ght, Lbs. (kg) 4070 (1848) 4210 (1911) 4330 (1966) 4460 (2025) Add'l Weight If Copper Finned Coils, lbs. (kg) 288 (130) 288 (130) 476 (216) 476 (216)

COMPRESSORS

Type Tandem Scrolls Tandem Scrolls Tandem S crolls Tandem Scrolls Nominal tonnage of each Compressor 10.0 10.0 10.0 13.0 13.0 13.0 13.0 15.0 Number Of Compressors per Ci rcuit 2 2 2 2 2 2 2 2 Oil Charge Per Compressor, oz. 140 140 140 140 140 140 140 140 Oil Charge Per Compressor, (g) (496) (496) (496) (496) (496) (496) (496) (496)

CAPACITY REDUCTION STEPS - PERCE NT OF COMPRESSOR DISPLACEMENT

Staging, 4 Stages, Circuit #1 in Lead 0-25-50-75-100 0-22-50-46-100 0-25-50-75-100 0-25-50-75-100 Staging, 4 Stages, Circuit #2 in Lead 0-25-50-75-100 0-28-50-85-100 0-25-50-75-100 0-25-50-75-100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area, sq. ft. 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 Coil Face Area , sq. m 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 Finned Height x Finned Length, in. 42x75.6 42x75.6 42x75.6 42x75.6 42x75.6 42x75.6 42x75.6 42x75.6

Finned Height x Finned Length, (mm) Fins Per Inch x Rows Deep 16 x 2 16 x 2 16 x 2 16 x 2 16 x 3 16 x 3 16 x 3 16 x 3

Pumpdown Capacity, 90% Full Lbs . (kg) 60 (27) 60 (27) 60(27) 60(27) 82 (37) 82 (37) 82 (37) 82 (37) Maximum Relief Valve Pressure Setting, psig (kPa)

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

Number Of Fans - Fan Diameter, in. (mm) 4 – 30 (762) 4 – 30 (762) 4 – 30 (762) 4 – 30 (762) Number Of Motors - HP (kW) (2) 4 – 1.5 4 – 1.5 4 – 1.5 4 – 1.5 Fan And Motor RPM, 60Hz 1140 1140 1140 1140 60 Hz Fan Tip Speed, FPM (m/sec) 8950 (4224) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, CFM (m3/sec) 39,600 (18,692) 39,600 (18, 692) 39,600 (18,692) 39,600 (18,692)

EVAPORAT OR - BRAZED PLATE-TO-PLATE

Number of Evaporators 1 1 1 1 Number of Refrigerant Circuits 2 2 2 2 Water Volume, Gallons, (L) 6.3 (23.9) 7.2 (27.3) 8.1 (30.7) 9.2 (34.9) Maximum Water P ressure, psig (kPa) 363 (2503) 363 (2503) 363 (2503) 363 (2503) Maximum Refrigerant Working Pressure, psig (kP a) 450 (3102) 450 (3102) 450 (3102) 450 (3102) Water Inlet / Outlet Victaulic Connections, in. (mm) 3 (76) 3 (76) 3 (76) 3 (76) Drain - NPT int, in. (mm ) Field Field Field Field Vent - NPT int, in. (mm) Field Field Field Field

NOTES

1. Nominal c apacit y bas ed on 95°F ambient air and 54°F/44°F water range.

2. Except for 380V/60 & 575V/60, HP = 2.0

040B 045B 050B 055B

Ckt.1 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.2

2398 x 2235 x

2550

1067 x

1920

450

(3103)

1067 x

1920

450

(3103)

AGZ MODEL NUMBER

2398 x 2235 x

2550

1067 x

1920

450

(3103)

1067 x

1920

450

(3103)

2398 x 2235 x

2550

1067 x

1920

450

(3103)

1067 x

1920

(3103)

450

2398 x 2235 x

2550

1067 x

1920

450

(3103)

1067 x

1920

(3103)

450

32 AGZ 026B through 130B IMM AGZ-7

Table 21, AGZ 060BS/BH through 070BS/BH

PHYSICAL DATA

BASIC DATA

Unit Capacity @ ARI Conditions (1), Tons (kW) 57.1 (201.0) 61.4 (215.5) 65. 5 (230.0) Number Of Refrigerant Circuits 2 2 2 Unit Operating Charge, R-22, lbs. 46 46 52 59 59 59 Unit Operating Charge, R-22, (kg) (21) (21) (24) (27) (27) (27) Cabinet Dimensions, LxWxH, in. 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4

Cabinet Dimensions, LxWxH, (mm) Unit Operating Weight, Lbs. (kg) 4600 4860 4990

Unit Shipping Wei ght, Lbs. (kg) 4520 4760 4890 Add'l Weight If Copper Finned Coils, lbs. (kg) 476 (216) 568 (258) 568 (258)

COMPRESSORS

Type Tandem Scrolls Tandem Scrolls Tandem Scrolls Nominal tonnage of each Com pressor 15.0 15.0 15.0 15 / 20 15 / 20 15 / 20 Number Of Compressors per Circuit 2 2 2 2 2 2 Oil Charge Per Compressor, oz. 140 140 140 140 /148 140 /148 140 /148 Oil Charge Per Compressor, (g) (496) (496) (496) 496/ 525 496/ 525 496/ 525

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Staging, 4 Stages, Circuit #1 in Lead 0-25-50-75-100 0-23-46-77-100 0-25-50-75-100 Staging, 4 Stages, Circuit #2 in Lead 0-25-50-75-100 0-31-46-69-100 0-25-50-75-100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area, sq. ft. 44.1 44.1 52.6 52.6 52.6 52.6 Coil Face Area, (m2) 4.1 4.1 4.9 4.9 4.9 4.9 Finned Height x Finned Length, in. 42x75.6 42x75.6 50x75.6 50x75.6 50x75.6 50x75.6

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

Pumpdown Capacity, 90% Full Lbs . (kg) 82 (37) 82 (37) 98 (44) 98 (44) 98 (44) 98 (44) Maximum Relief Valve Pressure Setting, psig (kPa)

CONDENSER FANS - DIRECT DRIVE PROPELL ER TYPE

Number Of Fans - Fan Diameter, in. (mm) 4 – 30 (762) 4 – 30 (762) 4 – 30 (762) Number Of Motors - HP (kW) (2) 4 – 1.5 4 – 2.0 4 – 2.0 Fan And Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, FPM (m/sec) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, CFM (m3/sec) 37,228 (17,572 43,452 (20,510) 43,452 (20,510)

EVAPORAT OR - BRAZED PLATE-TO-PLATE

Number of Evaporators 1 1 1 Number of Refrigerant Circuits 2 2 2 Water Volume, Gallons, (L) 9.2 (34.9) 11.2 (42.5) 11.2 (42.5) Maximum Water Pressure, psig (kPa) 363 (2503) 363 (2503) 363 (2503) Maximum Refrigerant Working Pressure, psig (kP a ) 450 (3102) 450 (3102) 450 (3102) Water Inlet / Outlet Victaulic Connections, in. (mm) 3 (76) 3 (76) 3 (76) Drain - NPT int, in. (mm ) Field Field Field Vent - NPT int, in. (mm) Field Field Field

NOTES

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

2. Except for 380V/60 & 575V/60 for AGZ 060, HP = 2.0

060B 065B 070B

Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2

2398 x 2235 x

2550

1067 x

1920

450

(3103)

AGZ MODEL NUMBER

2398 x 2235 x

2550

1067 x

1920

450

(3103)

1270 x

1920

450

(3103)

1270 x

1920

450

(3103)

2398 x 2235 x

2550

1270 x

1920

450

(3103)

1270 x

1920

(3103)

450

IMM AGZ-7 AGZ 026B through 130B 33

Table 22, AGZ 075BS/BH through 090BS/BH

PHYSICAL DATA

BASIC DATA

Unit Capacity @ ARI Conditions (1), Tons (kW) 73.7 (259.4) 79.6 (280.2) 85.5 (301.0) Number Of Refrigerant Circuits 2 2 2 Unit Operating Charge, R-22, lbs. 59 59 59 69 69 69 Unit Operating Charge, R-22, (kg) (27) (27) (27 (31) (31) (31) Cabinet Dimensions, LxWxH, in. 134.9 x 88.0 x 100.4 134.9 x 88.0 x 100.4 134.9 x 88.0 x 100.4 Cabinet Dimensions, LxWxH, (mm) 3426 x 2235 x 2550 3426 x 2235 x 2550 3426 x 2235 x 2550 Unit Operating Weight, Lbs. (kg) 6530 (2958) 6690 (3031) 6850 (3103) Unit Shipping Wei ght, Lbs. (kg) 6320 (2863) 6480 (2935) 6640 (3008) Add'l Weight If Copper Finned Coils, lbs. (kg) 870 (395) 870 (395) 870 (395)

COMPRESSORS

Type Tandem Scrolls Tandem Scrolls Tandem Scrolls Nominal tonnage of each Compressor 20.0 20.0 20.0 25.0 25.0 25.0 Number Of Compressors per Ci rcuit 2 2 2 2 2 2 Oil Charge Per Compressor, oz. 148 148 148 200 200 200 Oil Charge Per Compressor, (g) (525) (525) (525) (709) (709) (709)

CAPACITY REDUCTION STEPS - PERCE NT OF COMPRESSOR DISPLACEMENT

Staging, 4 Stages, Circuit #1 in Lead 0-25-50-75-100 0-22-50-72-100 0-25-50-75-100 Staging, 4 Stages, Circuit #2 in Lead 0-25-50-75-100 0-28-50-78-100 0-25-50-75-100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area, sq. ft. 78.8 78.8 78.8 78.8 78.8 78.8 Coil Face Area, (m2) 7.3 7.3 7.3 7.3 7.3 7.3 Finned Height x Finned Length, in. 50 x113.4 50 x113.4 50 x113.4 50 x113.4 50 x113.4 50 x113.4

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

Pumpdown Capacity, 90% Full Lbs . (kg) 147 (67) 147 (67) 147 (67) 147 (67) 147 (67) 147 (67) Maximum Relief Valve Pressure Setting, psig (kPa)

CONDENSER FANS - DIRECT DRIVE PROPELL E R TYPE

Number Of Fans - Fan Diameter, in. (mm) 6 – 30 (762) 6 – 30 (762) 6 – 30 (762) Number Of Motors - HP (kW) 6 – 2.0 6 – 2.0 6 – 2.0 Fan And Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, FPM (m/sec) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, CFM (m3/sec) 65,178 (30,765) 65,178 (30,765) 65,178 (30,765)

EVAPORAT OR - SHELL AND TUBE

Number of Evaporators 1 1 1 Number of Refrigerant Circuits 2 2 2 Diameter, in. - Length, ft. 14.0 x 5.2 14.0 x 5.2 14.0 x 5.2 Diameter, (mm) – Length, (mm) 356 x 1585 356 x 1585 356 x 1585 Water Volume, Gallons, (L) 25 (95) 25 (95) 25 (95) Maximum Water P ressure, psig (kPa) 152 (1047) 152 (1047) 152 (1047) Maximum Refrigerant Working Pressure, psig (kP a) 300 (2066) 300 (2066) 300 (2066) Water Inlet / Outlet Victaulic Connections, in. (mm) 5 (127) 5 (127) 5 (127) Drain - NPT int, in. (mm) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7) Vent - NPT int, in. (m m) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7)

NOTE:

1. Nominal c apacit y bas ed on 95°F ambient air and 54°F/44°F water range.

075B 085B 090B

Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2

1270 x

2880

450

(3103)

AGZ MODEL NUMBER

1270 x

2880

450

(3103)

1270 x

2880

450

(3103)

1270 x

2880

450

(3103)

1270 x

2880

450

(3103)

1270 x

2880

450

(3103)

34 AGZ 026B through 130B IMM AGZ-7

Table 5, AGZ 100BS/BH through 130BS/BH

PHYSICAL DATA

BASIC DATA

Unit Capacity @ ARI Conditions (1), Tons (kW) 97.6 (342.6) 107.5 (378.4) 119.8 (421.7) 129.4 (455.5) Number Of Refrigerant Circuits 2 2 2 2 Unit Operating Charge, R-22, lbs. 76 86 86 86 86 104 104 104 Unit Operating Charge, R-22, (kg) (35) (39) (39) (39) (39) (47) (47) (47) Cabinet Dimensions, LxWxH, in. 173.1 x 88.0 x 100.4 173.1 x 88.0 x 100.4 173.1 x 88.0 x 100.4 173.1 x 88.0 x 100.4 Cabinet Dimensions, LxWxH, (mm) 4397 x 2235 x 2550 4397 x 2235 x 2550 4397 x 2235 x 2550 4397 x 2235 x 2550 Unit Operating Weight, Lbs. (kg) 7870 (3565) 8150 (3692) 8720 (3950) 9050 (4100) Unit Shipping Wei ght, Lbs. (kg) 7580 (3434) 7860 (3561) 8380 (3796) 8710 (3946) Add'l Weight If Copper Finned Coils, lbs. (kg) 1155 (524) 1155 (524) 1155 (524) 1155 (524)

COMPRESSORS

Type Trio Scrolls Trio Scrolls Trio Scrolls Trio Scrolls Nominal tonnage of each Compressor 15.0 20.0 20.0 20.0 20.0 25.0 25.0 25.0 Number Of Compressors per Ci rcuit 3 3 3 3 3 3 3 3 Oil Charge Per Compressor, oz. 140 148 148 148 148 200 200 200 Oil Charge Per Compressor, (g) (496) (525) (525) (525) (525) (709) (709) (709)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Staging, 6 Stages, Circuit #1 in Lead 0-14-33-48-67-81-100 0-17-33-50-67-83-100 0-15-33-48-67-81-100 0-17-33-50-67-83-100 Staging, 6 Stages, Circuit #2 in Lead 0-19-33-52-67-86-100 0-17-33-50-67-83-100 0-19-33-52-67-86-100 0-17-33-50-67-83-100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area, sq. ft. 105.3 105.3 105.3 105.3 105.3 105.3 105.3 105.3 Coil Face Area, (m2) 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 Finned Height x Finned Length, in. 50 x151.6 50 x151.6 50 x151.6 50 x151.6 50 x151.6 50 x151.6 50 x151.6 50 x151.6

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% Full Lbs . (kg) 196 (89) 196 (89) 196 (89) 196 (89) 196 (89) 196 (89) 196 (89) 196 (89) Maximum Relief Valve Press ure Setting, psig

(kPa)

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

Number Of Fans - Fan Diameter, in. (mm) 8 – 30 (762) 8 – 30 (762) 8 – 30 (762) 8 – 30 (762) Number Of Motors - HP (kW) 8 – 2.0 8 – 2.0 8 – 2.0 8 – 2. 0 Fan And Motor RPM, 60Hz 1140 1140 1140 1140 60 Hz Fan Tip Speed, FPM (m/sec) 8950 (4224) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, CFM (m3/sec) 86,904 (41,020) 86, 904 (41, 020) 86,904 (41,020) 86,904 (41,020)

EVAPORAT OR - SHELL AND TUBE

Number of Evaporators 1 1 1 1, Number of Refrigerant Circuits 2 2 2 2 Diameter, in. - Length, ft. 12.8 x 7.9 12.8 x 7.9 14.0 x 8.0 14.0 x 8.0 Diameter, (mm) – Length, (mm) 324 x 2408 324 x 2408 356 x 2438 356 x 2438 Water Volume, Gallons, (L) 34 (127) 34 (127) 40 (150) 40 (150) Maximum Water P ressure, psig (kPa) 152 (1047) 152 (1047) 152 (1047) 152 (1047) Maximum Refrigerant Working Pressure, psig

(kPa) Water Inlet / Outlet Victaulic Connections, in. (mm) Drain - NPT int, in. (mm) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7)

Vent - NPT int, in. (mm) 0.5 (12.7) 0.5 (12.7) 0.5 (12.7) 0. 5 (12. 7)

100B 110B 120B 130B

Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2

1270 x

3851

450

(3103)

1270 x

3851

450

(3103)

300 (2066) 300 (2066) 300 (2066) 300 (2066)

5 (127) 5 (127) 5 (127) 5 (127)

AGZ MODEL NUMBER

1270 x

3851

450

(3103)

1270 x

3851

450

(3103)

1270 x

3851

450

(3103)

1270 x

3851

450

(3103)

1270 x

3851

450

(3103)

1270 x

3851

450

(3103)

NOTE:

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

IMM AGZ-7 AGZ 026B through 130B 35

Electrical Data, Standard Ambient

Table 23, AGZ 026BM/BS – 070BM/BS, Electrical Data, Single Point

(105°F and below)

AGZ Unit

Size

026B

030B

035B

040B

045B

050B

055B

060B

065B

070B

NOTES:

1. Units operating in ambient temperatures of 95°F (35°C) and above must use the

2. All Elec trical Data notes are on page 52.

3. Conduit hubs are not provi ded.

Volts

Maximum Fuse or HACR Breaker si ze.

Minimum

Circuit

Ampacity

(MCA)

208 133 3 1/0 150 150 230 126 3 #1 150 150 380 80 3 #4 90 90 460 68 3 #4 80 80 575 52 3 #6 60 60

208 146 3 1/0 175 175 230 143 3 1/0 175 175 380 88 3 #3 100 100 460 74 3 #4 80 90 575 58 3 #6 70 70

208 158 3 2/0 175 175 230 150 3 1/0 175 175 380 96 3 #3 110 110 460 79 3 #4 90 90 575 64 3 #6 70 70

208 167 3 2/0 200 200 230 167 3 2/0 200 200 380 113 3 #2 125 125 460 81 3 #4 90 90 575 70 3 #4 80 80

208 184 3 3/0 225 225 230 184 3 3/0 225 225 380 121 3 #1 125 125 460 94 3 #3 110 110 575 78 3 #4 90 90

208 199 3 3/0 225 225 230 199 3 3/0 225 225 380 127 3 #1 150 150 460 104 3 #2 125 125 575 86 3 #3 100 100

208 221 3 4/0 250 250 230 214 3 4/0 250 250 380 145 3 1/0 175 175 460 108 3 #2 125 125 575 96 3 #3 110 110

208 248 3 250 300 300 230 228 3 4/0 250 250 380 156 3 2/0 175 175 460 112 3 #2 150 150 575 105 3 #2 125 125

208 281 3 300 350 350 230 281 3 300 350 350 380 162 3 2/0 200 200 460 124 3 #1 150 150 575 109 3 #2 125 125

208 301 3 350 350 350 230 301 3 350 350 350 380 168 3 2/0 200 200 460 130 3 #1 150 150 575 112 3 #2 125 125

Power Supply

Field Wire

Quantity

Wire

Gauge

75C

Recomm’d.

Fuse

Or HACR

Breaker

Size

Max. Fuse

Or HACR

Breaker

Size

36 AGZ 026B through 130B IMM AGZ-7

Table 24, AGZ 026BM/BS – 070BM/BS, Compressor and Fan Motor Amps, Single and

Multi-Point (105°F and below ))

AGZ Unit

Volts

Size

026B

030B

035B

040B

045B

050B

055B

060B

065B

070B

All Electrical Dat a notes are on page 52.

No. 1 No. 3 No. 5 No. 2 No. 4 No. 6

208 25.7 25.7 - 25.7 25.7 - 5.8 4 23.3 189 189 - 189 189 230 24.2 24.2 - 24.2 24.2 - 5.8 4 26.1 189 189 - 189 189 380 14.9 14.9 - 14.9 14.9 - 4.1 4 20.0 112 112 - 112 112 460 13.4 13.4 - 13.4 13.4 - 2.8 4 13.0 99 99 - 99 99 575 9.3 9.3 - 9.3 9.3 - 3.0 4 14.0 74 74 - 74 74 -

208 25.7 25.7 - 31.8 31.8 - 5.8 4 23.3 189 189 - 232 232 230 24.2 24.2 - 31.8 31.8 - 5.8 4 26.1 189 189 - 232 232 380 14.9 14.9 - 18.6 18.6 - 4.1 4 20.0 112 112 - 144 144 460 13.4 13.4 - 16.0 16.0 - 2.8 4 13.0 99 99 - 125 125 575 9.3 9.3 - 12.2 12.2 - 3.0 4 14.0 74 74 - 100 100 -

208 31.8 31.8 - 31.8 31.8 - 5.8 4 23.3 232 232 - 232 232 230 29.9 29.9 - 29.9 29.9 - 5.8 4 26.1 232 232 - 232 232 380 18.6 18.6 - 18.6 18.6 - 4.1 4 20.0 144 144 - 144 144 460 16.0 16.0 - 16.0 16.0 - 2.8 4 13.0 125 125 - 125 125 575 12.2 12.2 - 12.2 12.2 - 3.0 4 14.0 100 100 - 100 100 -

208 33.8 33.8 - 33.8 33.8 - 5.8 4 23.3 278 278 - 278 278 230 33.8 33.8 - 33.8 33.8 - 5.8 4 26.1 278 278 - 278 278 380 22.8 22.8 - 22.8 22.8 - 4.1 4 20.0 151 151 - 151 151 460 16.5 16.5 - 16.5 16.5 - 2.8 4 13.0 127 127 - 127 127 575 13.7 13.7 - 13.7 13.7 - 3.0 4 14.0 100 100 - 100 100 -

208 33.8 33.8 - 41.4 41.4 - 5.8 4 23.3 278 278 - 350 350 230 33.8 33.8 - 41.4 41.4 - 5.8 4 26.1 278 278 - 350 350 380 22.8 22.8 - 26.0 26.0 - 4.1 4 20.0 151 151 - 195 195 460 16.5 16.5 - 21.8 21.8 - 2.8 4 13.0 127 127 - 158 158 575 13.7 13.7 - 17.3 17.3 - 3.0 4 14.0 100 100 - 125 125 -

208 41.4 41.4 - 41.4 41.4 - 5.8 4 23.3 350 350 - 350 350 230 41.4 41.4 - 41.4 41.4 - 5.8 4 26.1 350 350 - 350 350 380 26.0 26.0 - 26.0 26.0 - 4.1 4 20.0 195 195 - 195 195 460 21.8 21.8 - 21.8 21.8 - 2.8 4 13.0 158 158 - 158 158 575 17.3 17.3 - 17.3 17.3 - 3.0 4 14.0 125 125 - 125 125 -

208 41.0 41.0 - 51.3 51.3 - 5.8 4 23.3 350 350 - 425 425 230 41.0 41.0 - 48.1 48.1 - 5.8 4 26.1 350 350 - 425 425 380 26.0 26.0 - 33.8 33.8 - 4.1 4 20.0 195 195 - 239 239 460 21.8 21.8 - 23.7 23.7 - 2.8 4 13.0 158 158 - 187 187 575 17.3 17.3 - 21.8 21.8 - 3.0 4 14.0 125 125 - 148 148 -

208 52.8 52.8 - 52.8 52.8 - 5.8 4 23.3 425 425 - 425 425 230 48.1 48.1 - 48.1 48.1 - 5.8 4 26.1 425 425 - 425 425 380 32.7 32.7 - 32.7 32.7 - 4.1 4 20.0 239 239 - 239 239 460 23.7 23.7 - 23.7 23.7 - 2.8 4 13.0 187 187 - 187 187 575 21.8 21.8 - 21.8 21.8 - 3.0 4 14.0 148 148 - 148 148 -

208 52.8 52.8 - 52.8 73.1 - 7.8 4 31.7 425 425 - 425 505 230 52.8 52.8 - 52.8 73.1 - 7.8 4 35.6 425 425 - 425 505 380 32.7 32.7 - 32.7 38.2 - 4.1 4 20.0 239 239 - 239 280 460 23.7 23.7 - 23.7 30.1 - 3.6 4 17.8 187 187 - 187 225 575 21.8 21.8 - 21.8 25.2 - 3.0 4 14.0 148 148 - 148 180 -

208 52.8 73.1 - 52.8 73.1 - 7.8 4 31.7 425 505 - 425 505 230 52.8 73.1 - 52.8 73.1 - 7.8 4 35.6 425 505 - 425 505 380 32.7 38.2 - 32.7 38.2 - 4.1 4 20.0 239 280 - 239 280 460 23.7 30.1 - 23.7 30.1 - 3.6 4 17.8 187 225 - 187 225 575 21.8 25.2 - 21.8 25.2 - 3.0 4 14.0 148 180 - 148 180 -

Rated Load Amps Locked Rotor Amps

Compressors Compressors

F.L.Amps

Fan

Motors

(Each)

No. Of

Fan

Motors

Fan

Motors

(Each)

Across-The-Line

No.1 No. 3 No. 5 No.2 No.4 No. 6

IMM AGZ-7 AGZ 026B through 130B 37

Table 25, AGZ 026 BM/BS – 070BM/BS, Field Wiring, Single Point

(105°F and below)

Wiring to Standard

Amps

Power Block

Connector Wire

(Copper Wire Only)

AGZ

Unit

Size

026B

030B

035B

040B

045B

050B

055B

060B

065B

070B

All Electrical Dat a notes are on page 52.

Volts

208 175 14 GA – 2/0 225 # 4 - 300 kcmil 230 175 14 GA – 2/0 225 # 4 - 300 kcmil 380 175 14 GA – 2/0 150 # 4 - 300 kcmil 460 175 14 GA – 2/0 150 # 4 - 300 kcmil 575 175 14 GA – 2/0 150 # 4 - 300 kcmil

208 380 #4 – 500kcmil 225 # 4 - 300 kc mil 230 380 #4 – 500kcmil 225 # 4 - 300 kc mil 380 175 14 GA – 2/0 150 # 4 - 300 kcmil 460 175 14 GA – 2/0 150 # 4 - 300 kcmil 575 175 14 GA – 2/0 150 # 4 - 300 kcmil

208 380 #4 – 500kcmil 250 #6 - 350 kcmi l 230 380 #4 – 500kcmil 250 #6 - 350 kcmi l 380 175 14 GA – 2/0 150 # 4 - 300 kcmil 460 175 14 GA – 2/0 150 # 4 - 300 kcmil 575 175 14 GA – 2/0 150 # 4 - 300 kcmil

208 380 #4 – 500kcmil 400 250 kcmil -500 kcmil 230 380 #4 – 500kcmil 400 250 kcmil -500 kcmil 380 175 14 GA – 2/0 250 #6 - 350 kcmil 460 175 14 GA – 2/0 150 # 4 - 300 kcmil 575 175 14 GA – 2/0 150 # 4 - 300 kcmil

208 380 #4 – 500kcmil 400 250 kcmil -500 kcmil 230 380 #4 – 500kcmil 400 250 kcmil -500 kcmil 380 380 #4 – 500kcmil 250 #6 - 350 kcmi l 460 175 14 GA – 2/0 150 # 4 - 300 kcmil 575 175 14 GA – 2/0 150 # 4 - 300 kcmil

208 380 #4 – 500kcmil 400 250 kcmil -500 kcmil 230 380 #4 – 500kcmil 400 250 kcmil -500 kcmil 380 380 #4 – 500kcmil 250 #6 - 350 kcmi l 460 175 14 GA – 2/0 250 # 4 - 300 kcmil 575 175 14 GA – 2/0 150 # 4 - 300 kcmil

208 380 #4 – 500kcmil 400 250 kcmil -500 kcmil 230 380 #4 – 500kcmil 400 250 kcmil -500 kcmil 380 380 #4 – 500kcmil 250 #6 - 350 kcmi l 460 380 #4 – 500kcmil 250 # 4 - 300 kc mil 575 175 14 GA – 2/0 150 # 4 - 300 kcmil

Terminal

Range

Wiring to Optional

Non-Fused Disconnect Switch

Disconnect

Size

Connector Wire

Range

(Copper Wire Only)

38 AGZ 026B through 130B IMM AGZ-7

Table 26, AGZ 075BM/BS – 130BM/BS, Electrical Wiring,

Single Point (105°F and below)

AGZ Unit

Size

075B

085B

090B

100B

110B

120B

130B

NOTES:

1. Units operating in am bient tem peratures of 95° F (35°C) and above must use the Maximum

2. All Electri cal Data notes are on page 52.

3. (2) indicates that two conduits are required.

4. Conduit hubs are not suppli ed.

Volts

Fuse or HACR Breaker size.

Minimum

Circuit

Ampacity

(MCA)

208 358 6 4/0 400 400 230 358 6 4/0 400 400 380 187 3 3/0 225 225 460 150 3 1/0 175 175 575 125 3 #1 150 150

208 380 6 250 450 450 230 380 6 250 450 450 380 219 3 250 250 250 460 171 3 2/0 200 200 575 136 3 1/0 150 150

208 414 6 300 500 500 230 414 6 300 500 500 380 248 3 250 300 300 460 188 3 3/0 225 225 575 146 3 1/0 175 175

208 463 6 350 500 500 230 463 6 300 500 500 380 260 3 300 300 300 460 199 3 3/0 225 225 575 171 3 2/0 175 175

208 528 6 - (2) 300 600 600 230 528 6 - (2) 300 600 600 380 282 3 300 300 300 460 220 3 4/0 250 250 575 182 3 3/0 200 200

208 613 6 - (2) 350 700 700 230 613 6 - (2) 350 700 700 380 323 3 400 350 350 460 248 3 250 250 250 575 198 3 3/0 225 225

208 613 6 - (2) 350 700 700 230 613 6 - (2) 350 700 700 380 361 6 4/0 400 400 460 273 3 300 300 300 575 212 3 4/0 225 225

Power Supply M ax. Fuse

Field Wire

Quantity

Wire

Gauge

75C

Recomm’d.

Fuse

Or HACR

Breaker

Size

Or HACR

Breaker

Size

IMM AGZ-7 AGZ 026B through 130B 39

Table 27, AGZ 075BM/BS – 130BM/BS, Compressor and Fan Motor Amps, Single and

Multi-Point (105°F and below )

Rated Load Amps Locked Rotor Amps

AGZ Unit

Volts

Size

075B

085B

090B

100B

110B

120B

130B

All Electrical Dat a notes are on page 52.

No. 1 No. 3 No. 5 No. 2 No. 4 No. 6

208 73.1 73.1 - 73.1 73.1 - 7.8 6 31.7 505 505 - 505 505 230 73.1 73.1 - 73.1 73.1 - 7.8 6 35.6 505 505 - 505 505 380 38.2 38.2 - 38.2 38.2 - 4.1 6 20.0 280 280 - 280 280 460 30.1 30.1 - 30.1 30.1 - 3.6 6 17.8 225 225 - 225 225 575 25.2 25.2 - 25.2 25.2 - 3.0 6 14.0 180 180 - 180 180 -

208 73.1 73.1 - 83.3 83.3 - 7.8 6 31.7 505 505 - 500 500 230 73.1 73.1 - 83.3 83.3 - 7.8 6 35.6 505 505 - 500 500 380 38.2 38.2 - 52.5 52.5 - 4.1 6 20.0 280 280 - 305 305 460 30.1 30.1 - 39.0 39.0 - 3.6 6 17.8 225 225 - 250 250 575 25.2 25.2 - 30.0 30.0 - 3.0 6 14.0 180 180 - 198 198 -

208 86.4 86.4 - 86.4 86.4 - 7.8 6 31.7 500 500 - 500 500 230 86.4 86.4 - 86.4 86.4 - 7.8 6 35.6 500 500 - 500 500 380 52.5 52.5 - 52.5 52.5 - 4.1 6 20.0 305 305 - 305 305 460 39.0 39.0 - 39.0 39.0 - 3.6 6 17.8 250 250 - 250 250 575 30.0 30.0 - 30.0 30.0 - 3.0 6 14.0 198 198 - 198 198 -

208 52.8 52.8 52.8 74.5 74.5 74.5 7.8 8 31.7 425 425 425 505 505 505 230 52.8 52.8 52.8 74.5 74.5 74.5 7.8 8 35.6 425 425 425 505 505 505 380 32.7 32.7 32.7 39.8 39.8 39.8 4.1 8 20.0 239 239 239 280 280 280 460 23.7 23.7 23.7 30.6 30.6 30.6 3.6 8 17.8 187 187 187 225 225 225 575 21.8 21.8 21.8 25.2 25.2 25.2 3.0 8 14.0 148 148 148 180 180 180

208 74.5 74.5 74.5 74.5 74.5 74.5 7.8 8 31.7 505 505 505 505 505 505 230 74.5 74.5 74.5 74.5 74.5 74.5 7.8 8 35.6 505 505 505 505 505 505 380 39.8 39.8 39.8 39.8 39.8 39.8 4.1 8 20.0 280 280 280 280 280 280 460 30.6 30.6 30.6 30.6 30.6 30.6 3.6 8 17.8 225 225 225 225 225 225 575 25.2 25.2 25.2 25.2 25.2 25.2 3.0 8 14.0 180 180 180 180 180 180

208 87.9 87.9 87.9 88.0 88.0 88.0 7.8 8 31.7 505 505 505 500 500 500 230 87.9 87.9 87.9 88.0 88.0 88.0 7.8 8 35.6 505 505 505 500 500 500 380 39.8 39.8 39.8 52.5 52.5 52.5 4.1 8 20.0 280 280 280 305 305 305 460 30.6 30.6 30.6 39.0 39.0 39.0 3.6 8 17.8 225 225 225 250 250 250 575 25.2 25.2 25.2 30.0 30.0 30.0 3.0 8 14.0 180 180 180 198 198 198

208 88.0 88.0 88.0 88.0 88.0 88.0 7.8 8 31.7 500 500 500 500 500 500 230 88.0 88.0 88.0 88.0 88.0 88.0 7.8 8 35.6 500 500 500 500 500 500 380 52.5 52.5 52.5 52.5 52.5 52.5 4.1 8 20.0 305 305 305 305 305 305 460 39.0 39.0 39.0 39.0 39.0 39.0 3.6 8 17.8 250 250 250 250 250 250 575 30.0 30.0 30.0 30.0 30.0 30.0 3.0 8 14.0 198 198 198 198 198 198

Compressors Compressors

F.L.

Amps

Fan

Motors

(Each)

No. Of

Fan

Motors

Fan

Motors

(Each)

Across-The-Line

No.1 No. 3 No. 5 No.2 No.4 No. 6

40 AGZ 026B through 130B IMM AGZ-7

Table 28, AGZ 075BM/BS - 130BM/BS, Field Wiring, Single Point

(105°F and below)

Wiring to Standard

Amps

Power Block

Connector Wire

Range

(Copper Wire Only)

AGZ

Unit

Size

075B

085B

090B

100B

110B

120B

130B

All Electrical Dat a notes are on page 52.

Volts

208 760 2 GA – 500kcmil 600 (2) 250 kcmil -500 kcmil 230 760 2 GA – 500kcmil 600 (2) 250 kcmil -500 kcmil 380 380 #4 – 500kcmil 250 #6 - 350 kcmil 460 380 #4 – 500kcmil 250 #6 - 350 kcmil 575 380 #4 – 500kcmil 250 #6 - 350 kcmil

208 760 2 GA – 500kcmil 600 (2) 250 kcmil -500 kcmil 230 760 2 GA – 500kcmil 600 (2) 250 kcmil -500 kcmil 380 380 #4 – 500kcmil 400 250 kcm i l -500 kcmil 460 380 #4 – 500kcmil 250 #6 - 350 kcmil 575 380 #4 – 500kcmil 250 #6 - 350 kcmil

208 760 2 GA – 500kcmil 600 (2) 250 kcmil -500 kcmil 230 760 2 GA – 500kcmil 600 (2) 250 kcmil -500 kcmil 380 380 #4 – 500kcmil 400 250 kcm i l -500 kcmil 460 380 #4 – 500kcmil 400 250 kcm i l -500 kcmil 575 380 #4 – 500kcmil 250 #6 - 350 kcmil

208 760 2 GA – 500kcmil 800 (2) 250 kcmil -500 kcmil 230 760 2 GA – 500kcmil 800 (2) 250 kcmil -500 kcmil 380 380 #4 – 500kcmil 400 250 kcm i l -500 kcmil 460 380 #4 – 500kcmil 400 (2) 3/0-250 kcmil 575 380 #4 – 500kcmil 400 (2) 3/0-250 kcmil

208 760 2 GA – 500kcmil 800 (2) 250 kcmil -500 kcmil 230 760 2 GA – 500kcmil 800 (2) 250 kcmil -500 kcmil 380 380 #4 – 500kcmil 400 250 kcm i l -500 kcmil 460 380 #4 – 500kcmil 400 250 kcm i l -500 kcmil 575 380 #4 – 500kcmil 400 (2) 3/0-250 kcmil

208 760 2 GA – 500kcmil 800 (2) 250 kcmil -500 kcmil 230 760 2 GA – 500kcmil 800 (2) 250 kcmil -500 kcmil 380 760 2 GA – 500kcmil 600 (2) 3/0-250 kcmil 460 380 #4 – 500kcmil 400 250 kcm i l -500 kcmil 575 380 #4 – 500kcmil 400 (2) 3/0-250 kcmil

Terminal

Disconnect

Wiring to Optional

Non-Fused Disconnect Switch

Size

Connector Wire Range

(Copper Wire Only)

IMM AGZ-7 AGZ 026B through 130B 41

Table 29, AGZ 026BM/BS – 070BM/BS, Electrical Data, Multi - Point

(105°F and below)

Electrical Circuit #1 Electrical Circuit #2

Wire

Gauge

Recomm’d

Fuse

or HACR

Breaker

Size

Max. Fuse

or HACR

Breaker

Size

Minimum

Circuit

Ampacity

(MCA)

Qty

Wire

Gauge

AGZ

Unit

Size

026B

030B

035B

040B

045B

050B

055B

060B

065B

070B

NOTES:

1. All Elec trical Data not es are on page 52.

2. Conduit hubs are not s upplied.

Minimum

Volts

208 70 3 #4 80 90 70 3 #4 80 90 230 66 3 #4 80 90 66 3 #4 80 90 380 42 3 #8 50 50 42 3 #8 50 50 460 36 3 #8 45 45 36 3 #8 45 45 575 27 3 #10 35 35 27 3 #10 35 35

208 70 3 #4 80 90 83 3 #4 100 110 230 66 3 #4 80 90 83 3 #4 100 100 380 42 3 #8 50 50 50 3 #8 60 60 460 36 3 #8 45 45 42 3 #8 50 50 575 27 3 #10 35 35 34 3 #10 40 45

208 83 3 #4 100 110 83 3 #4 100 110 230 79 3 #4 100 100 79 3 #4 100 100 380 50 3 #8 60 60 50 3 #8 60 60 460 42 3 #8 50 50 42 3 #8 50 50 575 34 3 #10 40 45 34 3 #10 40 45

208 88 3 #3 110 110 88 3 #3 110 110 230 88 3 #3 110 100 88 3 #3 110 100 380 60 3 #6 70 80 60 3 #6 70 80 460 43 3 #8 50 50 43 3 #8 50 50 575 37 3 #8 45 50 37 3 #8 45 50

208 88 3 #3 110 110 105 3 #2 125 125 230 88 3 #3 110 110 105 3 #2 125 125 380 60 3 #6 70 80 67 3 #4 80 80 460 43 3 #8 50 50 55 3 #6 70 70 575 37 3 #8 45 50 45 3 #8 50 60

208 105 3 #2 125 125 105 3 #2 125 125 230 105 3 #2 125 125 105 3 #2 125 125 380 67 3 #4 80 80 67 3 #4 80 80 460 55 3 #6 70 70 55 3 #6 70 70 575 45 3 #8 50 60 45 3 #8 50 60

208 105 3 #2 125 125 120 3 #1 150 150 230 105 3 #2 125 125 120 3 #1 150 150 380 67 3 #4 80 80 82 3 #3 100 110 460 55 3 #6 70 70 59 3 #6 70 80 575 45 3 #8 50 60 55 3 #6 70 70

208 120 3 #1 150 150 120 3 #1 150 150 230 120 3 #1 150 150 120 3 #1 150 150 380 82 3 #3 100 110 82 3 #3 100 110 460 59 3 #6 70 80 59 3 #6 70 80 575 55 3 #6 70 70 55 3 #6 70 70

208 135 3 1/0 175 175 160 3 2/0 200 225 230 135 3 1/0 175 175 160 3 2/0 200 225 380 82 3 #4 100 110 89 3 #3 110 125 460 61 3 #6 70 80 69 3 #4 90 100 575 55 3 #6 70 70 59 3 #6 70 80

208 160 3 2/0 200 225 160 3 2/0 200 225 230 160 3 2/0 200 225 160 3 2/0 200 225 380 89 3 #3 110 125 89 3 #3 110 125 460 69 3 #4 90 100 69 3 #4 90 100 575 59 3 #6 70 80 59 3 #6 70 80

Circuit

Ampacity

(MCA)

Power Supply Power Supply

Field Wire Field Wire

Qty

Recomm’d

Fuse

or HACR

Breaker

Size

Max. Fuse

or HACR

Breaker

Size

42 AGZ 026B through 130B IMM AGZ-7

Table 30, AGZ 026BM/BS - 070BM/BS, Field Wiring, Multi- Poi nt

(105°F and below)

Wiring to Standard

AGZ

Unit

Size

026B

030B

035B

040B

045B

050B

055B

060B

065B

070B

All Electrical Dat a notes are on page 52.

Volts

208 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0 230 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0 380 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0 460 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0 575 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0

208 380 380 #4 – 500 kcmil #4 – 500 kcmil 225 225 #4 – 300 kcmil #4 – 300 kcmil 230 380 380 #4 – 500 kcmil #4 – 500 kcmil 225 225 #4 – 300 kcmil #4 – 300 kcmil 380 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0 460 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0 575 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0

Terminal

Amps

Cir #1 Cir #2 Cir #1 Cir #2 Cir #1 Cir #2 Cir #1 Cir #2

Power Block

Connector Wire Range

(Copper Wire Only)

Disconnect Size

Wiring to Optional

Non-Fused Disconnect Switch

Connector Wire Range

(Copper Wire Only)

IMM AGZ-7 AGZ 026B through 130B 43

Table 31, AGZ 075BM/BS - 130BM/BS, Field Wiring Data (105°F and below)

Wiring to Standard

AGZ

Unit Size

075B

085B

090B

100B

110B

120B

130B

All Electrical Dat a notes are on page 52.

Volts

208 380 380 #4 – 500 kcmil #4 – 500 kcmil 250 250 #4 – 300 kcmil #4 – 300 kcmi l 230 380 380 #4 – 500 kcmil #4 – 500 kcmil 250 250 #4 – 300 kcmil #4 – 300 kcmi l 380 175 175 14 GA – 2/0 14 GA – 2/0 250 250 #4 – 300 k cmil #4 – 300 kcmil 460 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0 575 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0

208 380 380 #4 – 500 kcmil #4 – 500 kcmil 250 400 #4 – 300 kcmil 250 – 500 kcmil 230 380 380 #4 – 500 kcmil #4 – 500 kcmil 250 400 #4 – 300 kcmil 250 – 500 kcmil 380 175 175 14 GA – 2/0 14 GA – 2/0 150 250 #14 - 1/0 #4 – 300 kcmil 460 175 175 14 GA – 2/0 14 GA – 2/0 150 250 #14 - 1/0 #4 – 300 kcmil 575 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0

208 380 380 #4 – 500 kcmil #4 – 500 kcmil 400 400 250 – 500 k cmil 250 – 500 kcmil 230 380 380 #4 – 500 kcmil #4 – 500 kcmil 400 400 250 – 500 k cmil 250 – 500 kcmil 380 380 380 #4 – 500 kcmil #4 – 500 kcmil 250 250 #4 – 300 kcmil #4 – 300 kcmi l 460 380 380 #4 – 500 kcmil #4 – 500 kcmil 250 250 #4 – 300 kcmil #4 – 300 kcmi l 575 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0

208 380 380 #4 – 500 kcmil #4 – 500 kcmil 400 400 250 – 500 k cmil 250 – 500 kcmil 230 380 380 #4 – 500 kcmil #4 – 500 kcmil 400 400 250 – 500 k cmil 250 – 500 kcmil 380 380 380 #4 – 500 kcmil #4 – 500 kcmil 250 250 #4 – 300 kcmil #4 – 300 kcmi l

460 380 380 575 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0

208 380 380 #4 – 500 kcmil #4 – 500 kcmil 400 400 250 – 500 k cmil 250 – 500 kcmil 230 380 380 #4 – 500 kcmil #4 – 500 kcmil 400 400 250 – 500 k cmil 250 – 500 kcmil 380 380 380 #4 – 500 kcmil #4 – 500 kcmil 250 250 #4 – 300 kcmil #4 – 300 kcmi l 460 380 380 #4 – 500 kcmil #4 – 500 kcmil 250 250 #4 – 300 kcmil #4 – 300 kcmi l 575 175 175 14 GA – 2/0 14 GA – 2/0 150 150 #14 - 1/0 #14 - 1/0

Terminal

Amps

Cir #1 Cir #2 Cir #1 Cir #2 Ci r #1 Cir #2 Cir #1 Cir #2

Power Block

Connector Wire Range

(Copper Wire Only)

#4 – 500

kcmil14

Disconnect Size

#4 – 500 kcmil14 250 250 #4 – 300 kcmil #4 – 300 kcmil

Wiring to Optional

Non-Fused Disconnect Switch

Connector Wire Range

(Copper Wire Only)

44 AGZ 026B through 130B IMM AGZ-7

Table 32, AGZ 065BM/BS - 130BM/BS, Electrical Data, Mult i -Point

V

(105°F and below)

Electrical Circuit #1 Electrical Circuit #2 Power

AGZ

Unit

Size

075B

085B

090B

100B

110B

120B

130B

NOTES:

1. All Elec trical Data not es are on page 52.

2. Conduit hubs are not s upplied.

Minimum

olts

Circuit

Ampacity

(MCA)

208 188 3 3/0 225 250 188 3 3/0 225 250 230 188 3 3/0 225 250 188 3 3/0 225 250 380 98 3 #3 110 125 98 3 #3 110 125 460 79 3 #4 90 110 79 3 #4 90 110 575 66 3 #4 80 90 66 3 #4 80 90

208 188 3 3/0 225 250 218 3 4/0 250 300 230 188 3 3/0 225 250 218 3 4/0 250 250 380 98 3 #3 110 125 130 3 #1 150 175 460 79 3 #4 90 110 99 3 #3 125 125 575 66 3 #4 80 90 77 3 #4 90 100

208 218 3 4/0 250 300 218 3 4/0 250 300 230 218 3 4/0 250 250 218 3 4/0 250 250 380 130 3 #1 150 175 130 3 #1 150 175 460 99 3 #3 125 125 99 3 #3 125 125 575 77 3 #4 90 100 77 3 #4 90 100

208 203 3 4/0 250 250 273 3 300 300 300 230 203 3 3/0 225 225 273 3 300 300 300 380 123 3 #1 150 150 146 3 1/0 175 200 460 92 3 #3 110 110 114 3 #1 150 175 575 83 3 #4 100 100 94 3 #3 110 125

208 273 3 300 300 300 273 3 300 300 300 230 273 3 300 300 300 273 3 300 300 300 380 146 3 1/0 175 175 146 3 1/0 175 175 460 114 3 #1 125 125 114 3 #1 125 125 575 94 3 #3 110 110 94 3 #3 110 110

208 317 3 300 400 400 317 3 400 400 400 230 317 3 300 400 400 318 3 400 400 400 380 146 3 1/0 175 175 187 3 2/0 225 225 460 114 3 #1 125 125 141 3 1/0 175 175 575 94 3 #3 110 110 110 3 #2 125 125

208 317 3 400 400 400 317 3 400 400 400 230 318 3 400 400 400 318 3 400 400 400 380 187 3 2/0 225 225 187 3 2/0 225 225 460 141 3 1/0 175 175 141 3 1/0 175 175 575 110 3 #2 125 125 110 3 #2 125 125

Supply

Field Wire Field Wire

Gauge

Qty

Wire

75C

Recomm’d

Fuse

or HACR

Breaker

Size

Max. Fuse

or HACR

Breaker

Size

Minimum

Circuit

Ampacity

(MCA)

Power

Supply

Qty

Recomm’d

Wire

Gauge

75C

Fuse

or HACR

Breaker

Size

Max.

Fuse

or HACR

Breaker

Size

IMM AGZ-7 AGZ 026B through 130B 45

Electrical Data High Ambient

Table 33, AGZ 026BB/BH – 070BB/BH, Electrical Data,

Single Point (Above 105

AGZ Unit

Size

026B

030B

035B

040B

045B

050B

055B

060B

065B

070B

NOTES:

1. Units operating in am bient tem peratures above 95°F (35°C)

2. All Electri cal Data notes are on page 52.

3. Conduit hubs are not provided.

Volts

must use the Maximum Fuse or HACR Breaker s ize.

Minimum

Circuit

Ampacity

(MCA)

208 147 3 1/0 175 175 230 133 3 1/0 150 150 380 80 3 #4 90 90 460 68 3 #4 80 80 575 53 3 #6 60 60

208 158 3 2/0 175 175 230 144 3 1/0 175 175 380 88 3 #3 100 100 460 74 3 #4 90 90 575 59 3 #6 70 70

208 168 3 2/0 200 200 230 155 3 2/0 175 175 380 96 3 #3 110 110 460 80 3 #4 90 90 575 64 3 #6 70 70

208 187 3 3/0 200 200 230 167 3 2/0 200 200 380 113 3 #2 125 125 460 84 3 #4 90 90 575 70 3 #4 80 80

208 207 3 4/0 225 225 230 188 3 3/0 225 225 380 123 3 #1 125 125 460 94 3 #3 110 110 575 78 3 #4 90 90

208 226 3 4/0 225 225 230 207 3 3/0 225 225 380 132 3 1/0 150 150 460 104 3 #2 125 125 575 86 3 #3 100 100

208 249 3 250 250 250 230 229 3 4/0 250 250 380 147 3 1/0 175 175 460 115 3 #2 125 125 575 96 3 #3 110 110

208 270 3 300 300 300 230 248 3 250 250 250 380 160 3 2/0 175 175 460 124 3 #1 150 150 575 105 3 #2 125 125

208 303 3 350 350 350 230 282 3 300 350 350 380 164 3 2/0 200 200 460 138 3 1/0 175 175 575 115 3 #2 125 125

208 323 3 400 400 400 230 304 3 350 350 350 380 172 3 2/0 200 200 460 150 3 1/0 175 175 575 123 3 #1 150 150

Power Supply

Field Wire

Quantity

°

F to 125°F)

Recomm’d.

Wire

Gauge

75C

Or HACR

Breaker

Fuse

Size

Max. Fuse

Or HACR

Breaker

Size

46 AGZ 026B through 130B IMM AGZ-7

Table 34, AGZ 026BB/BH – 070BB/BH, Compressor and Fan Motor Amps, Single and

°

Multi-Point (Above 105

Rated Load Amps Locked Rotor Amps

AGZ

Unit

Volts

Size

026B

030B

035B

040B

045B

050B

055B

060B

065B

070B

All Electrical Dat a notes are on page 52.

No. 1 No. 3 No. 5 No. 2 No. 4 No. 6

208 29.0 29.0 - 29.0 29.0 - 5.8 4 23.3 189 189 - 189 189 230 25.7 25.7 - 25.7 25.7 - 5.8 4 26.1 189 189 - 189 189 380 14.9 14.9 - 14.9 14.9 - 4.1 4 20.0 112 112 - 112 112 460 13.4 13.4 - 13.4 13.4 - 2.8 4 13.0 99 99 - 99 99 575 9.5 9.5 - 9.5 9.5 - 3.0 4 14.0 74 74 - 74 74 -

208 29.0 29.0 - 34.0 34.0 - 5.8 4 23.3 189 189 - 232 232 230 25.7 25.7 - 30.9 30.9 - 5.8 4 26.1 189 189 - 232 232 380 14.9 14.9 - 18.6 18.6 - 4.1 4 20.0 112 112 - 144 144 460 13.4 13.4 - 16.2 16.2 - 2.8 4 13.0 99 99 - 125 125 575 9.5 9.5 - 12.2 12.2 - 3.0 4 14.0 74 74 - 100 100 -

208 34.0 34.0 - 34.0 34.0 - 5.8 4 23.3 232 232 - 232 232 230 30.9 30.9 - 30.9 30.9 - 5.8 4 26.1 232 232 - 232 232 380 18.6 18.6 - 18.6 18.6 - 4.1 4 20.0 144 144 - 144 144 460 16.2 16.2 - 16.2 16.2 - 2.8 4 13.0 125 125 - 125 125 575 12.2 12.2 - 12.2 12.2 - 3.0 4 14.0 100 100 - 100 100 -

208 38.5 38.5 - 38.5 38.5 - 5.8 4 23.3 278 278 - 278 278 230 33.8 33.8 - 33.8 33.8 - 5.8 4 26.1 278 278 - 278 278 380 22.8 22.8 - 22.8 22.8 - 4.1 4 20.0 151 151 - 151 151 460 17.0 17.0 - 17.0 17.0 - 2.8 4 13.0 127 127 - 127 127 575 13.7 13.7 - 13.7 13.7 - 3.0 4 14.0 100 100 - 100 100 -

208 38.5 38.5 - 47.6 47.6 - 5.8 4 23.3 278 278 - 350 350 230 33.8 33.8 - 43.3 43.3 - 5.8 4 26.1 278 278 - 350 350 380 22.8 22.8 - 27.2 27.2 - 4.1 4 20.0 151 151 - 195 195 460 17.0 17.0 - 21.8 21.8 - 2.8 4 13.0 127 127 - 158 158 575 13.7 13.7 - 17.3 17.3 - 3.0 4 14.0 100 100 - 125 125 -

208 47.6 47.6 - 47.6 47.6 - 5.8 4 23.3 350 350 - 350 350 230 43.3 43.3 - 43.3 43.3 - 5.8 4 26.1 350 350 - 350 350 380 27.2 27.2 - 27.2 27.2 - 4.1 4 20.0 195 195 - 195 195 460 21.8 21.8 - 21.8 21.8 - 2.8 4 13.0 158 158 - 158 158 575 17.3 17.3 - 17.3 17.3 - 3.0 4 14.0 125 125 - 125 125 -

208 47.6 47.6 - 58.1 58.1 - 5.8 4 23.3 350 350 - 425 425 230 43.3 43.3 - 52.8 52.8 - 5.8 4 26.1 350 350 - 425 425 380 27.2 27.2 - 33.8 33.8 - 4.1 4 20.0 195 195 - 239 239 460 21.8 21.8 - 26.5 26.5 - 2.8 4 13.0 158 158 - 187 187 575 17.3 17.3 - 21.8 21.8 - 3.0 4 14.0 125 125 - 148 148 -

208 58.1 58.1 - 58.1 58.1 - 5.8 4 23.3 425 425 - 425 425 230 52.8 52.8 - 52.8 52.8 - 5.8 4 26.1 425 425 - 425 425 380 33.8 33.8 - 33.8 33.8 - 4.1 4 20.0 239 239 - 239 239 460 26.5 26.5 - 26.5 26.5 - 2.8 4 13.0 187 187 - 187 187 575 21.8 21.8 - 21.8 21.8 - 3.0 4 14.0 148 148 - 148 148 -

208 58.1 58.1 - 58.1 78.0 - 7.8 4 31.7 425 425 - 425 505 230 52.8 52.8 - 52.8 74.1 - 7.8 4 35.6 425 425 - 425 505 380 32.7 32.7 - 32.7 39.8 - 4.1 4 20.0 239 239 - 239 280 460 25.5 25.5 25.5 37.5 - 3.6 4 17.8 187 187 - 187 225 575 21.8 21.8 - 21.8 29.9 - 3.0 4 14.0 148 148 - 148 180 -

208 58.1 78.0 - 58.1 78.0 - 7.8 4 31.7 425 505 - 425 505 230 52.8 74.1 - 52.8 74.1 - 7.8 4 35.6 425 505 - 425 505 380 32.7 39.8 - 32.7 39.8 - 4.1 4 20.0 239 280 - 239 280 460 25.5 37.5 - 25.5 37.5 - 3.6 4 17.8 187 225 - 187 225 575 21.8 29.9 - 21.8 29.9 - 3.0 4 14.0 148 180 - 148 180 -

Compressors Compressors

F to 125°F))

F.L.Amps

Fan

Motors

(Each)

No.

of

Fan

Motors

R.L.Amps

Fan

Motors

(Each)

Across-The-Line

No.1 No. 3 No. 5 No.2 No.4 No. 6

IMM AGZ-7 AGZ 026B through 130B 47

Table 35, AGZ 026BB/BH - 070BB/BH, Electrical Data, Multi -Point (Above 105°F

°

Circuit

Ampacity

(MCA)

F)

Electrical Circuit #1 Electrical Circuit #2

Power Supply Power Supply

Field Wire Field Wire

Qty

Wire

Gauge

75C

Recomm’d

Fuse

or HACR

Breaker

Size

Max. Fuse

or HACR

Breaker

Size

Minimum

Circuit

Ampacity

(MCA)

Qty

Wire

Gauge

75C

Recomm’d

Fuse

or HACR

Breaker

Size

Max. Fuse

or HACR

Breaker

Size

to 125

AGZ

Unit

Size

026B

030B

035B

040B

045B

050B

055B

060B

070B

NOTES:

1. All Electric al Data notes are on page 52.

2. Conduit hubs are not supplied.

Minimum

Volts

208 77 3 #4 90 100 77 3 #4 90 100 230 70 3 #4 80 90 70 3 #4 80 90 380 42 3 #8 50 50 40 3 #8 50 50 460 36 3 #8 45 45 36 3 #8 45 45 575 27 3 #10 35 35 27 3 #10 35 35

208 77 3 #4 90 100 88 3 #3 100 110 230 70 3 #4 80 90 81 3 #4 100 110 380 42 3 #8 50 50 50 3 #8 60 60 460 36 3 #8 45 45 42 3 #8 50 50 575 27 3 #10 35 35 34 3 #10 45 45

208 88 3 #3 100 110 88 3 #3 100 110 230 81 3 #4 100 110 81 3 #4 100 110 380 50 3 #8 60 60 50 3 #8 60 60 460 42 3 #8 50 50 42 3 #8 50 50 575 34 3 #10 45 45 34 3 #10 45 45

208 98 3 #3 125 125 98 3 #3 125 125 230 88 3 #3 110 110 88 3 #3 110 110 380 60 3 #6 70 80 60 3 #6 70 80 460 44 3 #8 50 60 44 3 #8 50 60 575 37 3 #8 45 50 37 3 #8 45 50

208 98 3 #3 125 125 119 3 #1 150 150 230 88 3 #3 110 110 109 3 #2 125 150 380 60 3 #6 70 80 70 3 #4 80 90 460 44 3 #8 50 60 55 3 #6 70 70 575 37 3 #8 45 50 45 3 #8 60 60

208 119 3 #1 150 150 119 3 #1 150 150 230 109 3 #2 125 150 109 3 #2 125 150 380 70 3 #4 80 90 70 3 #4 80 90 460 55 3 #6 70 70 55 3 #6 70 70 575 45 3 #8 60 60 45 3 #8 60 60

208 119 3 #1 150 150 142 3 1/0 175 200 230 109 3 #2 125 150 130 3 #1 175 175 380 70 3 #4 80 90 84 3 #4 100 110 460 55 3 #6 70 70 65 3 #4 80 90 575 45 3 #8 60 60 55 3 #6 70 70

208 142 3 1/0 175 200 142 3 1/0 175 200 230 130 3 #1 175 175 130 3 #1 175 175 380 84 3 #4 100 110 84 3 #4 100 110 460 65 3 #4 80 90 65 3 #4 80 90 575 55 3 #6 70 70 55 3 #6 70 70

208 146 3 1/0 175 200 171 3 2/0 225 225 230 134 3 1/0 175 175 161 3 2/0 200 225 380 82 3 #4 100 110 91 3 #3 110 125 460 67 3 #6 80 90 80 3 #4 100 110 575 55 3 #6 70 70 65 3 #6 90 90

48 AGZ 026B through 130B IMM AGZ-7

Table 36, AGZ 075BB/BH – 130BB/BH, Electrical Data, Single Point

(Above 105

AGZ Unit

Size

075B

085B

090B

100B

110B

120B

130B

NOTES:

1. Units operating in am bient tem peratures of 95°F (35° C) and above

2. All Electri cal Data notes are on page 52.

3. (2) in column with wire qty. i ndicates t hat two conduits are requi red.

4. Conduit hubs are not suppli ed.

Volts

must use the Maximum Fuse or HACR Breaker s ize.

Minimum

Ampacity

208 378 6 250 450 450 230 362 6 4/0 400 400 380 194 3 3/0 225 225 460 187 3 3/0 225 225 575 145 3 1/0 175 175

208 398 6 250 450 450 230 382 6 250 450 450 380 234 3 250 250 250 460 200 3 4/0 225 225 575 151 3 1/0 175 175

208 416 6 300 500 500 230 401 6 350 450 450 380 270 3 300 300 300 460 211 3 4/0 250 250 575 157 3 2/0 175 175

208 522 6 400 600 600 230 462 6 350 500 500 380 273 3 300 300 300 460 230 3 4/0 250 250 575 187 3 3/0 200 200

208 612 6 - (2) 350 700 700 230 526 6 - (2) 300 600 600 380 307 3 350 350 350 460 263 3 300 300 300 575 211 3 4/0 225 225

208 612 6 - (2) 350 700 700 230 571 6 - (2) 350 600 600 380 352 6 - (2) 4/0 400 400 460 286 3 350 300 300 575 219 3 4/0 250 250

208 613 6 - (2) 350 700 700 230 613 6 - (2) 350 700 700 380 393 6 250 450 450 460 307 3 350 350 350 575 228 3 250 250 250

Circuit

(MCA)

°

F to 125°F)

Power Supply M ax. Fuse

Field Wire

Quantity

Wire

Gauge

75C

Recomm’d.

Fuse

Or HACR

Breaker

Size

Or HACR

Breaker

Size

IMM AGZ-7 AGZ 026B through 130B 49

Table 37, AGZ 075BB/BH – 130BB/BH, Compressor and Fan Motor Amps, Single and

°

Multi-Point (Above 105

AGZ Unit

Volts

Size

075B

085B

090B

100B

110B

120B

130B

All Electrical Dat a notes are on page 52.

No. 1 No. 3 No. 5 No. 2 No. 4 No. 6

208 78.0 78.0 78.0 78.0 - 7.8 6 31.7 505 505 - 505 505 230 74.1 74.1 - 74.1 74.1 - 7.8 6 35.6 505 505 - 505 505 380 39.8 39.8 - 39.8 39.8 - 4.1 6 20.0 280 280 - 280 280 460 38.8 38.8 - 38.8 38.8 - 3.6 6 17.8 225 225 - 225 225 575 29.9 29.9 - 29.9 29.9 - 3.0 6 14.0 180 180 - 180 180 -

208 78.0 78.0 - 86.9 86.9 - 7.8 6 31.7 505 505 - 500 500 230 74.1 74.1 - 83.3 83.3 - 7.8 6 35.6 505 505 - 500 500 380 39.8 39.8 - 57.6 57.6 - 4.1 6 20.0 280 280 - 305 305 460 38.8 38.8 - 44.5 44.5 - 3.6 6 17.8 225 225 - 250 250 575 29.9 29.9 - 32.5 32.5 - 3.0 6 14.0 180 180 - 198 198 -

208 86.9 86.9 - 86.9 86.9 - 7.8 6 31.7 500 500 - 500 500 230 83.3 83.3 - 83.3 83.3 - 7.8 6 35.6 500 500 - 500 500 380 57.6 57.6 - 57.6 57.6 - 4.1 6 20.0 305 305 - 305 305 460 44.5 44.5 44.5 44.5 - 3.6 6 17.8 250 250 - 250 250 575 32.5 32.5 - 32.5 32.5 - 3.0 6 14.0 198 198 - 198 198 -

208 58.1 58.1 58.1 87.9 87.9 87.9 7.8 8 31.7 425 425 425 505 505 505 230 52.8 52.8 52.8 74.2 74.2 74.2 7.8 8 35.6 425 425 425 505 505 505 380 32.7 32.7 32.7 43.8 43.8 43.8 4.1 8 20.0 239 239 239 280 280 280 460 25.5 25.5 25.5 37.5 37.5 37.5 3.6 8 17.8 187 187 187 225 225 225 575 21.8 21.8 21.8 29.9 29.9 29.9 3.0 8 14.0 148 148 148 180 180 180

208 87.9 87.9 87.9 87.9 87.9 87.9 7.8 8 31.7 505 505 505 505 505 505 230 74.2 74.2 74.2 74.2 74.2 74.2 7.8 8 35.6 505 505 505 505 505 505 380 43.8 43.8 43.8 43.8 43.8 43.8 4.1 8 20.0 280 280 280 280 280 280 460 37.5 37.5 37.5 37.5 37.5 37.5 3.6 8 17.8 225 225 225 225 225 225 575 29.9 29.9 29.9 29.9 29.9 29.9 3.0 8 14.0 180 180 180 180 180 180

208 87.9 87.9 87.9 88.0 88.0 88.0 7.8 8 31.7 505 505 505 500 500 500 230 74.2 74.2 74.2 88.0 88.0 88.0 7.8 8 35.6 505 505 505 500 500 500 380 43.8 43.8 43.8 57.6 57.6 57.6 4.1 8 20.0 280 280 280 305 305 305 460 37.5 37.5 37.5 44.5 44.5 44.5 3.6 8 17.8 225 225 225 250 250 250 575 29.9 29.9 29.9 32.5 32.5 32.5 3.0 8 14.0 180 180 180 198 198 198

208 88.0 88.0 88.0 88.0 88.0 88.0 7.8 8 31.7 500 500 500 500 500 500 230 88.0 88.0 88.0 88.0 88.0 88.0 7.8 8 35.6 500 500 500 500 500 500 380 57.6 57.6 57.6 57.6 57.6 57.6 4.1 8 20.0 305 305 305 305 305 305 460 44.5 44.5 44.5 44.5 44.5 44.5 3.6 8 17.8 250 250 250 250 250 250 575 32.5 32.5 32.5 32.5 32.5 32.5 3.0 8 14.0 198 198 198 198 198 198

Compressors Compressors

Rated Load Amps Locked Rotor Amps

F to 125°F)

F.L.Amps

Fan

Motors

(Each)

No.

of

Fan

Motors

R.L.Amps

Fan

Motors

(Each)

Across-The-Line

No.1 No. 3 No. 5 No.2 No.4 No. 6

50 AGZ 026B through 130B IMM AGZ-7

Table 38, AGZ 075BB/BH – 130BB/BH, Electrical Data, Multi-Point

V

(Above 105

AGZ

Unit

Size

075B

085B

090B

100B

110B

120B

130B

NOTES:

1. All Elec trical Data notes are on page 52.

2. Conduit hubs are not supplied.

Minimum

olts

Circuit

Ampacity

(MCA)

208 199 3 3/0 225 250 199 3 3/0 225 250 230 190 3 3/0 225 250 190 3 3/0 225 250 380 102 3 #2 125 125 102 3 #2 125 125 460 99 3 #3 110 125 99 3 #3 110 125 575 76 3 #4 90 100 76 3 #4 90 100

208 199 3 3/0 225 250 219 3 4/0 250 300 230 190 3 3/0 225 250 211 3 4/0 250 250 380 102 3 #2 125 125 142 3 1/0 175 175 460 99 3 #3 110 125 111 3 #2 125 150 575 76 3 #4 90 100 83 3 #3 100 110

208 219 3 4/0 250 300 219 3 4/0 250 300 230 211 3 4/0 250 250 211 3 4/0 250 250 380 142 3 1/0 175 175 142 3 1/0 175 175 460 111 3 #2 125 150 111 3 #2 125 150 575 83 3 #3 100 110 83 3 #3 100 110

208 220 3 4/0 250 250 317 3 400 350 400 230 203 3 4/0 225 250 272 3 300 300 300 380 123 3 #1 150 150 159 3 2/0 175 200 460 101 3 #2 110 125 136 3 1/0 150 175 575 83 3 #4 100 100 109 3 #2 125 125

208 317 3 400 350 400 317 3 400 350 400 230 272 3 300 300 300 272 3 300 300 300 380 159 3 2/0 175 200 159 3 2/0 175 200 460 136 3 1/0 150 175 136 3 1/0 150 175 575 109 3 #2 125 125 109 3 #2 125 125

208 317 3 400 400 400 317 3 400 400 400 230 272 3 300 300 300 317 3 400 400 400 380 159 3 2/0 200 200 204 3 4/0 250 250 460 136 3 1/0 175 175 159 3 2/0 200 200 575 109 3 #2 125 125 118 3 #1 150 150

208 317 3 400 400 400 317 3 400 400 400 230 317 3 400 400 400 317 3 400 400 400 380 204 3 4/0 250 250 204 3 4/0 250 250 460 159 3 2/0 200 200 159 3 2/0 200 200 575 118 3 #1 150 150 118 3 #1 150 150

°

F to 125°F)

Electrical Circuit #1 Electrical Circuit #2 Power

Supply

Field Wire Field Wire

Gauge

Qty

Wire

75C

Recomm’d

Fuse

or HACR

Breaker

Size

Max. Fuse

or HACR

Breaker

Size

Minimum

Circuit

Ampacity

(MCA)

Power

Supply

Qty

Wire

Gauge

75C

Recomm’d

or HACR

Fuse

Breaker

Size

Max.

Fuse

or HACR

Breaker

Size

IMM AGZ-7 AGZ 026B through 130B 51

Notes for “Electrical Data Single- and Multi-Point” Power:

1. Unit wire size ampacity (MCA) is equal to 125% of the largest compressormotor RLA plus 100% of RLA of all other loads in the circuit including the control transformer.

2. The control transformer is furnished and no separate 115V power is required. For both single- and multi-point power connections, the control transformer is in circuit #1 with control power wired from there to circuit #2. In multi-point power, disconnecting power to circuit will disconnect all control power to the unit.

3. If a separate 115V power supply is used for the control circuit, then the wire sizing amps is 10 amps for all unit sizes.

4. Recommended power lead wire sizes for 3 conductors per conduit are based on 100% conductor ampacity in accordance with NEC. Voltage drop has not been included. Therefore, it is recommended that power leads be kept short. All terminal block connections must be made with copper (type THW) wire.

5. “Recommended Fuse Sizes” are selected at approximately 150% to 175% of the largest compressor RLA, plus 100% of all other loads in the circuit.

6. “Maximum Fuse or HACR breaker size” is selected at approximately 225% of the largest compressor RLA, plus 100% of all other loads in the circuit.

7. The recommended power lead wire sizes are based on an ambient temperature of 86°F (30°C). Ampacity correction factors must be applied for other ambient temperatures. Refer to the National Electrical Code Handbook.

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

Voltage Limitations:

1. Within ± 10 percent of nameplate rating

2. Voltage phase unbalance not to exceed 2% with a resultant current unbalance of 6 to 10 times the voltage unbalance per NEMA MG-1, 1998 Standard.

Notes for “Compressor and Condenser Fan Amp Draw”:

1. Compressor RLA values are for wiring sizing purposes only but do not reflect normal operating current draw at rated capacity.

Notes for “Field Wiring Data”

1. Requires a single disconnect to supply electrical power to the unit. This power supply must either be fused or use an HACR type circuit breaker.

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

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

Circuit Breakers (AGZ 026 to 130)

Factory installed circuit breakers are standard on units with single point power supply only. This option provides unit installed compressor short circuit protection and makes servicing easier.

Connection Type Power Block

Single Point (Standard) Std Opt. Std Opt

Multi-Point (Optional) Std Opt. Not Avail. Opt.

Disconnect

Swt.

Circuit

Breakers

High Short

Circuit Current

52 AGZ 026B through 130B IMM AGZ-7

Figure 22, AGZ 026B – AGZ 130B, Typical Field Wiring

A

3 PHASE

POWER

DISCONNECT (BY OTHERS)

UNIT MAIN

TERMINAL BLOCK

GND LUG

TO COMPRESSOR(S)

AND FAN MO TORS

NOTE: ALL FIELD WIRING TO BE INSTALLED AS NEC CLASS 1 WIRING SYSTEM WITH CONDUCTOR RATED 600 VOLTS

FIELD SUPPLIED

REMOTE STOP SWITCH

(BY OTHERS)

ICE MODE SWITCH

(BY OTHERS)

ALARM BELL

OPTION

CHW FLOW SWITCH

---MANDATORY–(BY OTHERS)

OPTION

N

120VAC

CONTROL POWER

FACTORY SUPPLIED ALARM

FIELD WIRED

ALARM BELL RELAY

TIME

CLOCK

NOR. OPEN PUMP AUX. CONTACTS (OPTIONAL)

4-20MA FOR

EVAP. WATE R RESET

(BY OTHERS )

FUSED CONTROL

CIRCUIT TRANSFORMER

DISCONNECT (BY OTHERS)

10A

FUSE

(BY OTHERS)

CHW PUMP RELAY

120 VAC 1. 0 AMP MAX

OFF

UTO

ON

MANUAL

OFF

UTO

ON

MANUAL

+

-

(BY OTHERS)

120 VAC

CONTROLLER

TB1

TB2

TB1-20

1 2

35

33

34

CONTROL

CIRCUIT

FUSE

120 VAC

N

120 VAC

32

GND

IF REMOTE STOP

52 72

43 83

54

CONTROL IS USED,

585

REMOVE LEAD 585 FROM TERM. 52 TO 72.

BELL

12

LARM BELL OPTION

LARM BELL

RELAY

COM NO

74

44 61

68

69

4-20MA FOR

DEMAND LIMIT

(BY OTHERS)

DWG. 330423101 REV.0A

+

-

LESS EVAPORATOR ONLY

LIQUID LINE #1 SOLENOID

24 VAC 1.5 AMP MAX

LIQUID LINE #2 SOLENOID

24 VAC 1.5 AMP MAX

70

71

GND

91

93

92

93

24 VAC

N

24 VAC

N

IMM AGZ-7 AGZ 026B through 130B 53

Dimensional Data

(

)

(

)

(

)

(

)

(

)

Figure 23, Dimensions, AGZ 026BS – 070BS Packaged Chiller

ISOLATOR LOCATIONS ON BOTTOM OF RAIL

13.31

(338.07)

67.76 (1721.10)

COMPRESSOR

CIRCUIT #2

EVAPORATOR

55.65 (1413.51)

COMPRESSOR

CIRCUIT #1

13.31

(338.07)

2.00

(50.8)

2.00

(50.8)

33.52

(851.41)

8.80

(223.52)

19.94

(506.48)

Unit Size

AGZ 026BS AGZ 030BS AGZ 035BS AGZ 040BS AGZ 045BS AGZ 050BS AGZ 055BS AGZ 060BS AGZ 065BS AGZ 070BS

CONTROL PANEL

CONTROL

PANEL

FIELD CONTROL

CONNECTION

Y

EVAP

INLET

94.38 (2397.25)

EVAP

OUTLET

Z

19.94

506.48

88.00 (2235.20

6.38

162.05

X

Center of Gravity - Inches (mm) Weights – Lbs (kg)

X Y Z

39 (991) 40 (1016) 42 (1067) 3 3950 (1792) 3990 (1810) 39 (991) 40 (1016) 42 (1067) 3 3990 (1810) 4040 (1833)

40 (1016) 40 (1016) 42 (1067) 3 4030 (1828) 4080 (1851)

39 (991) 39 (991) 41 (1041) 3 4070 (1846) 4130 (1873) 40 (1016) 38 (965) 41 (1041) 3 4210 (1910) 4270 (1937) 40 (1016) 39 (991) 42 (1067) 3 4330 (1964) 4400 (1996) 40 (1016) 39 (991) 43 (1092) 3 4460 (2023) 4540 (2059) 40 (1016) 39 (991) 43 (1092) 3 4520 (2050) 4600 (2087) 41 (1041) 40 (1016) 45 (1143) 3 4760 (2159) 4860 (2204) 41 (1041) 41 (1041) 45 (1143) 3 4890 (2218) 4990 (2263)

Evap Inlet &

Outlet

Victaulic in.

Shipping Weight Operating Weight

14.33

363.98

POWER ENTRY

POINT

0.875 KNOCK OUT

43.75

1111.25

DWG # 3305195

100.40

2550.16

54 AGZ 026B through 130B IMM AGZ-7

Figure 24, AGZ 075BS - 090BS Packaged Chiller

12.4

(315)

14.3

(364)

ISOLATOR LOCATIONS ON BOTTOM OF RAIL

EVAPORATOR

INLET

OUTLET

60.0 (1525)

110.1 (2797) COMPRESSORS CIRC. #2

COMPRESSORS CIRC. #1

12.

(315)

2.0

(51)

2.0

(51)

CONTROL

PANEL

FIELD CONTROL

CONNECTION

CONTROL

PANEL

POWER ENTRY

POINT

0.875 KNOCK OUT

100.4

(2550)

15.5 (392)

AGZ 075BS AGZ 085BS AGZ 090BS

28.5 (724)

Unit Size

Y

28.5

(724)

134.9 (3426)

Center of Gravity Inches (mm) Weights Lbs. (kg)

X Y Z

Z

Evap Inlet &

Outlet Victaulic

in.

Shipping Weight Operating Weight

88.0 (2235)

6.4

(162)

X

43.8

(1111)

14.4

(364)

Dwg. # 3305023

44 (1118) 42 (1067) 60 (1524) 5 6320 (2867) 6530 (2962) 43 (1092) 40 (1016) 60 (1524) 5 6480 (2939) 6690 (3035) 44 (1118) 39 (991) 59 (1499) 5 6640 (3012) 6850 (3107)

IMM AGZ-7 AGZ 026B through 130B 55

Figure 25, AGZ 100BS - 130BS Packaged Chiller

(

)

(

)

33.7

(855)

16.2

(410)

ISOLATOR LOCATIONS ON BOTTOM OF RAIL

67.8 (1721)

EVAPORATOR

OUTLET "A"

"C"

INLET

"A"

173.1 (4396)

67.8 (1721)

COMPRESSORS CIRC. #2

Z

12.4 (315)

2.0

(51)

2.0

(51)

COMPRESSORS CIRC. #1

CONTROL

PANEL

FIELD CONTROL

CONNECTION

Y

24.0

(610)

CONTROL

PANEL

6.4 (162)

88.0 (2235

POWER ENTRY POINT

0.875 KNOCK OUTS

100.4 2550

43.8

1111

14.4 (365)

X

Dwg. # 3305024

"B"

25.2

(641)

24.0

(610)

Unit Size

AGZ 100BS AGZ 110BS AGZ 120BS AGZ 130BS

Evap Inlet

& Outlet

Victaulic

“A” in.

5 5 8 8

Evaporator Water

Connections Inches (mm)

B C X Y Z

Center of Gravity

Inches (mm)

Weights

Lbs. (kg)

Shipping

Weight

Operating

Weight

14.8 (375.9) 93. 5 (2374. 9) 43 (1092) 43 (1092) 76 (1930) 7580 (3438) 7870 (3570)

14. 8 (375.9) 93.5 (2374.9) 44 (1118) 43 (1092) 75 (1905) 7860 (3565) 8150 (3697)

15.3 (388.6) 92. 4 (2346. 9) 43 (1092) 40 (1016) 75 (1905) 8380 (3801) 8720 (3955)

15.3 (388.6) 92. 4 (2346. 9) 44 (1118) 38 (965) 74 (1880) 8710 (3951) 9050 (4105)

56 AGZ 026B through 130B IMM AGZ-7

R-407C Units

AGZ chillers are available with R-407C refrigerant as non-ARI certified units. R-407C is a zeotropic blend of three compounds, and as such exhibits the characteristic of glide. It does not behave as one substance like R-22 does. Glide is the difference (in degrees F) between the beginning and end phase-change process in either the evaporator or condenser. During these processes, different ratios of the refrigerant’s components change phase from the beginning to the end of the process. The following functions, conditions and settings will differ from units charged with R-22.

1. Polyolester lubricants are used instead of mineral oil.

2. The saturated pressure/temperature relationship

3. Control and alarm settings

4. Charging procedures

1. Lubrication. The units are factory-charged with polyoester (POE) lubricant and one of

2. Pressure/temperature relat i o n s h i p . See Figure 26 on page 58 for the saturated pressure-

the following lubricants must be used if lubricant is to be added to the system:

Copeland Ultra 22 CC Mobil EAL™ Arctic 22 CC ICI EMKARATE RL RL™ 32CF

POEs are very hygroscopic and will quickly absorb moisture if exposed to air. Pump the lubricant into the unit through a closed transfer system. Avoid overcharging the unit.

temperature chart. Due to refrigerant glide, use the following procedures for superheat and subcooling measurement.

To determine superheat, only vapor must be present at the point of measurement, no liquid. Use the temperature reading, the pressure reading and the Saturated P/T Chart. If the pressure is measured at 78 psig, the chart shows the saturated vapor

50.6°F. If the temperature is measured at 60°F, the superheat is 9.4 degrees F. To determine subcooling, only liquid must be present, no vapor. Use the temperature

reading, the pressure reading and the Saturated P/T Chart. If the pressure is measured at 250 psig, the chart shows the saturated liquid temperature is measured at 98°F, the subcooling is 10.2 degrees F.

The P/T relationship between R-407C and R-22 is similar enough to allow the use of R-22 expansion valves. The valves may be marked as “R-22’ or “R-22/R-407C”.

3. Control and alarm settings. The software that controls the operation of the unit is

factory-set for operation with R-407C, taking into account that the pressure/temperature relationship differs from R-22. The software functionality is the same for either refrigerant.

4. Charging procedure. The units are factory-charged with R-407C. Use the following procedure if recharging in the field is necessary:

Whether topping off a charge or replacing the circuit’s entire charge, always remove the refrigerant from the charging vessel as a liquid. Many of the cylinders for the newer refrigerants have a dip tube so that liquid is drawn off when the cylinder is in the upright position. Do not vapor charge out of a cylinder unless the entire contents will be charged into the system.

temperature to be 108.2°F. If the

temperature to be

With the system in a 250-micron or lower vacuum, liquid can be charged into the high side. Initially charge about 80 percent of the system total charge.

IMM AGZ-7 AGZ 026B through 130B 57

Start the system and observe operation. Use standard charging procedures (liquid only) to top off the charge.

It may be necessary to add refrigerant through the compressor suction. Because the refrigerant leaving the cylinder must be a liquid, exercise care to avoid damage to the compressor. A sight glass can be connected between the charging hose and the compressor. It can be adjusted to have liquid leave the cylinder and vapor enter the compressor.

Figure 26, R-407C Saturated Pressure/Temperature Chart

Pressure

(PSIG)

20 -10.7 1.5 150 74.8 84.9 22 -8.2 4.0 155 76.8 86.8 24 -5.7 6.4 160 78.7 88.7 26 -3.4 8.7 165 80.6 90.5 28 -1.1 11.0 170 82.5 92.3 30 1.1 13.1 175 84.3 94.0 32 3.2 15.2 180 86.1 95.8 34 5.3 17.2 185 87.8 97.5 36 7.3 19.2 190 89.6 99.1 38 9.2 21.0 195 91.3 100.7 40 11.1 22.9 200 92.9 102.3 42 12.9 24.7 205 94.6 103.9 44 14.7 26.4 210 96.2 105.4 46 16.4 28.1 215 97.7 107.0 48 18.1 29.7 220 99.3 108.4 50 19.7 31.3 225 100.8 109.9 52 21.3 32.9 230 102.3 111.4 54 22.9 34.4 235 103.8 112.8 56 24.4 35.9 240 105.3 114.2 58 25.9 37.4 245 106.7 115.6 60 27.4 38.8 250 108.2 116.9 62 28.8 40.2 255 109.6 118.2 64 30.2 41.6 260 111.0 119.6 66 31.6 43.0 265 112.3 120.9 68 33.0 44.3 270 113.7 122.1 70 34.3 45.6 275 115.0 123.4 72 35.6 46.9 280 116.3 124.7 74 36.9 48.1 285 117.6 125.9 76 38.2 49.3 290 118.9 127.1 78 39.4 50.6 295 120.2 128.3 80 40.6 51.8 300 121.4 129.5 82 41.9 52.9 305 122.7 130.7 84 43.0 54.1 310 123.9 131.8 86 44.2 55.2 315 125.1 133.0 88 45.4 56.3 320 126.3 134.1 90 46.5 57.4 325 127.5 135.2 92 47.6 58.5 330 128.7 136.3 94 48.7 59.6 335 129.8 137.4 96 49.8 60.7 340 131.0 138.5

98 50.9 61.7 345 132.1 139.6 100 51.9 62.7 350 133.2 140.6 105 54.5 65.2 355 134.3 141.7 110 57.0 67.7 360 135.4 142.7 115 59.5 70.0 365 136.5 143.7 120 61.8 72.3 370 137.6 144.7 125 64.1 74.6 375 138.7 145.7 130 66.4 76.7 380 139.8 146.7 135 68.5 78.8 385 140.8 147.7 140 70.7 80.9 390 141.8 148.7 145 72.8 82.9 395 142.9 149.6

Liquid Temp

(°F)

Vapor Temp

(°F)

Pressure

(PSIG)

Liquid Temp

(°F)

Vapor Temp

(°F)

58 AGZ 026B through 130B IMM AGZ-7

Startup

Pre Start-up

The chiller must be inspected to ensure no components became loose or damaged during shipping or installation.

Start-Up

Refer to the MicroTech II Controller information in the operating manual OM AGZ-1 to become familiar with unit operation before starting the chiller.

There should be adequate building load (at least 50 percent of the unit full load capacity) to properly check the operation of the chiller refrigerant circuits.

Be prepared to record all operating parameters required by the “Compressorized Equipment Warranty Form”. Return this information within 10 working days to McQuay International as instructed on the form to obtain full warranty benefits.

1. Verify chilled water flow.

2. Verify remote start / stop or time clock (if installed) has requested the chiller to start.

3. Set the chilled water setpoint to the required temperature. (The system water temperature must be greater than the total of the leaving water temperature setpoint plus one-half the control band before the MicroTech II controller will stage on cooling.)

4. Set the Evap Delta T and the Start Delta T as a starting point.

5. Put both pumpdown switches (PS1 and PS2) to the ON position.

6. Put system switch (S1) to ON position.

Switch

PS1, PS2, Pumpdown Switches

S1, System Switch

Circuits will operate in the

normal automatic mode

Unit will operate in the

normal automatic mode

ON OFF

7. There may be a delay of 2 minutes after closing S1. The time delay is due to the compressor inherent motor protection or the Stage Up Timer counting. This should only occur on initial start-up or when power to the chiller has been turned off and back on. More than one compressor will not start at the same time.

8. After the chiller has been operating for a period of time and has become stable, check the following:

S Compressor oil level. (Some scroll compressors do not have oil sight glasses.) S Refrigerant sight glass for flashing S Rotation of condenser fans

9. Complete the “Compressorized Equipment Warranty Form”.

Switch Position

Circuit will go through the

normal pumpdown cycle and

shut off.

Unit will shut off immediately

without pumping down

(emergency stop)

IMM AGZ-7 AGZ 026B through 130B 59

Shutdown

Temporary

1. Put both circuit switches to the OFF position (Pumpdown and Stop).

2. After compressors have stopped, put System Switch (S1) to OFF (emergency stop).

3. Turn off chilled water pump. Chilled water pump to operate while compressors are pumping down.

To start the chiller after a temporary shutdown, follow the start-up instructions.

Extended

1. Front seat both condenser liquid line service valves.

2. Put both circuit switches to the OFF position (Pumpdown and Stop position).

3. After the compressors have stopped, put System Switch (S1) to the OFF position (emergency stop).

4. Front seat both refrigerant circuit discharge valves (if applicable).

5. If chilled water system is not drained, maintain power to the evaporator heater to prevent freezing. Maintain heat tracing on the chilled water lines.

6. Drain evaporator and water piping to prevent freezing.

7. If electrical power to the unit is on, the compressor crankcase heaters will keep the liquid refrigerant out of the compressor oil. This will minimize start-up time when putting the unit back into service. The evaporator heater will be able to function.

8. If electrical power is off, make provisions to power the evaporator heater (if chilled water system is not drained). Tag all opened electrical disconnect switches to warn against start-up before the refrigerant valves are in the correct operating position. At start-up, electrical power must be on for 24 hours before starting the chiller.

To start the chiller after an extended shutdown, follow the prestart-up and start-up instructions.

Water Piping Checkout

1. Check the pump operation and vent all air from the system.

2. Circulate evaporator water, checking for proper system pressure and evaporator pressure drop. Compare the pressure drop to the evaporator water pressure drop curve.

3. Clean all water strainers before placing the chiller into service.

Refrigerant Piping Checkout

1. Check all exposed brazed joints for evidence of leaks. Joints may have been damaged during shipping or when the unit was installed.

2. Check that all refrigerant valves are either opened or closed as required for proper operation of the chiller.

3. A thorough leak test must be done using an approved electronic leak detector. Check all valve stem packing for leaks. Replace all refrigerant valve caps and tighten.

4. Check all refrigerant lines to insure that they will not vibrate against each other or against other chiller components and are properly supported.

5. Check all flare connections and all refrigerant threaded connectors.

6. Look for any signs of refrigerant leaks around the condenser coils and for damage during shipping or installation.

7. Leak detector is applied externally to refrigerant joints at the factory. Do not confuse this residue with an oil leak.

8. Connect refrigerant service gauges to each refrigerant circuit before starting unit.

60 AGZ 026B through 130B IMM AGZ-7

Electrical Check Out

CAUTION

Electrical power must be applied to the compressor crankcase heaters 24 hours

before starting unit to drive off refrigerant from the oil.

1. Open all electrical disconnects and check all power wiring connections. Start at the power block and check all connections through all components to and including the compressor terminals. These should be checked again after 3 months of operation and at least yearly thereafter.

2. Check all control wiring by pulling on the wire at the spade connections and tighten all screw connections. Check plug-in relays for proper seating and to insure retaining clips are installed.

3. Put System Switch (S1) to the Emergency Stop position.

4. Put both circuit #1 & #2 switches to the Pumpdown and Stop position.

5. Apply power to the unit. The panel Alarm Light will stay on until S1 is closed. Ignore the Alarm Light for the check out period. If you have the optional Alarm Bell, you may wish to disconnect it.

6. Check at the power block or disconnect for the proper voltage and proper voltage between phases. Check power for proper phasing using a phase sequence meter before starting unit.

7. Check for 120Vac at the optional control transformer and at TB-2 terminal #1 and the neutral block (NB).

8. Check between TB-2 terminal #7 and NB for 120Vac supply for transformer #2.

9. Check between TB-2 terminal #2 and NB for 120Vac control voltage. This supplies the compressor crank case heaters.

10. Check between TB-3 terminal #17 and #27 for 24Vac control voltage.

Component Operation

Hot Gas Bypass (Optional)

This option allows the system to operate at lower loads without excessive on/off compressor cycling. The hot gas bypass option is required to be on both refrigerant circuits because of the lead / lag feature of the controller.

This option allows passage of discharge gas into the evaporator inlet (between the TX valve and the evaporator) which generates a false load to supplement the actual chilled water or air handler load.

Note: The hot gas bypass valve cannot generate a 100% false load.

The pressure regulating valve is a Sporlan SHGBE-8 and factory set to begin opening at 69 psig and can be changed by changing the pressure setting. The adjustment range is 0 to 100 psig. To raise the pressure setting, remove the cap on the bulb and turn the adjustment screw clockwise. To lower the setting, turn the screw counterclockwise. Do not force the adjustment beyond the range it is designed for, as this will damage the adjustment assembly. The regulating valve opening point can be determined by slowly reducing the system load while observing the suction pressure. When the bypass valve starts to open, the refrigerant line on the evaporator side of the valve will begin to feel warm to the touch.

IMM AGZ-7 AGZ 026B through 130B 61

The bypass valve includes a solenoid valve that is controlled by the MicroTech II controller. It is active when the first stage of cooling on a circuit is active.

WARNING

The hot gas line may become hot enough to cause injury.

Be careful during valve checkout.

VFD Low Ambient Control (Optional)

The optional VFD fan control is used for unit operation below 35°F (2°C) down to a mini mum o f 0 °F (-17°C). The control looks at the saturated discharge temperature and varies the fan speed to hold the temperature (pressure) at the “target” temperature. This temperature is established as an input to a setpoint screen labeled “Sat Condenser Temp Target”.

Filter-Driers

Each refrigerant circuit is furnished with a full flow filter drier (AGZ 026 – 070) or a replaceable core type filter-drier (AGZ 075 – 130). The core assembly of the replaceable core drier consists of a filter core held tightly in the shell in a manner that allows full flow without bypass.

Pressure drop across the filter drier at full load conditions must not exceed 10 psig at full load. See page 66 for maximum pressure drop at other load points. Replace the filter drier if the pressure drop exceeds maximum.

WARNING

Pump out refrigerant before removing end flange for replacement of core(s) to

remove liquid refrigerant and lower pressure to prevent accidental blow off of

cover. EPA recovery regulations apply to this procedure.

A condenser liquid line service valve is provided for isolating the charge in the condenser, but also serves as the point from which the liquid line can be pumped out. With the line free of refrigerant, the filter-drier core(s) can be easily replaced.

System A djustment

To maintain peak performance at full load operation, the system superheat and liquid subcooling may require adjustment. Read the following subsections closely to determine if adjustment is required.

Liquid Line Sight Glass

The color of the moisture indicator is an indication of the dryness of the system and is extremely important when the system has been serviced. Immediately after the system has been opened for service, the element may indicate a wet condition. It is recommended that the equipment operate for about 12 hours to allow the system to reach equilibrium before deciding if the system requires a change of drier cores.

Bubbles in the sight glass at constant full load indicates a shortage of refrigerant, a plugged filter-drier, or a restriction in the li quid line. However, it is not unusual to see bubbles in the sight glass during changing load conditions.

Refrigerant Charging

Liquid line subcooling at the liquid shut-off valve should be between 15 and 20 degrees F at full load. If the unit is at steady full load operation and bubbles are visible in the sight glass, then check liquid subcooling.

62 AGZ 026B through 130B IMM AGZ-7

Thermostatic Expansion Valve

The expansion valve performs one specific function. It keeps the evaporator supplied with the proper amount of refrigerant to satisfy the load conditions.

The sensing bulb of the expansion valve is installed in the closest straight run of suction line from the evaporator. The bulb is held on by clamps around the suction line and is insulated to reduce the effect of surrounding ambient temperatures. In case the bulb must be removed, simply slit the insulation on each side of the bulb, remove the clamps and then remove the capillary tubing that runs along the suction line from the valve. The power element is removable from the valve body.

NOTE: Before adjusting superheat, chec k that unit charge is corr ect and liquid line sight glass is full with no bubbles and that the circuit is operating under stable, full load conditions.

The suction superheat for the suction leaving the evaporator is set at the factory for 8 to 12 degrees F at full load. To have full rated unit performance, the superheat must be about 8 degrees F at 95°F outdoor ambient temperature.

Crankcase Heaters

The scroll compressors are equipped with externally mounted band heaters located at the oil sump level. The function of the heater is to keep the temperature in the crankcase high enough to prevent refrigerant from migrating to the crankcase and condensing in the oil during off-cycle.

Power must be supplied to the heaters 24 hours before starting the compressors.

Evaporator

Models AGZ 026 through 070

The evaporator is a compact, high efficiency, single or dual circuit, brazed plate-toplate type heat exchanger consisting of parallel stainless steel plates.

The evaporator is protected with an electric resistance heater and insulated with 3/4" (19mm) thick closed-cell polyurethane insulation. This combination provides freeze protection down to -20°F (-29°C) ambient air temperature.

The water side working pressure is 363 psig (2503 kPa). Evaporators are designed and constructed according to, and listed by, Underwriters Laboratories (UL).

Models AGZ 075 through 130

The evaporator is direct expansion, shell-and-tube type with water flowing in the baffled shell side and refrigerant flowing through the tubes. Two independent refrigerant circuits within the evaporator serve the unit's dual refrigerant circuits.

The evaporator is wrapped with an electric resistance heater cable and insulated with 3/4" (19mm) thick vinyl nitrate polymer sheet insulation, protecting against water freeze-up at ambient air temperatures to -20°F (-29°C). An ambient air thermostat controls the heater cable. The fitted and glued-in-place insulation has a K factor of

0.28 Btu in/hr ft

The refrigerant (tube) side maximum working pressure is 300 psig (2068 kPa). The water side working pressure is 152 psig (1048 kPa). Each evaporator is designed, constructed, inspected, and stamped according to the requirements of the ASME Boiler and Pressure Vessel Code. Double thickness insulation is available as an option.

2

°F at 75°F.

Phase Voltage Monitor (Optional)

Factory settings are as follows: Trip Delay Time, 2 seconds Voltage Setting, set at nameplate voltage. Restart Delay Time, 60 seconds

IMM AGZ-7 AGZ 026B through 130B 63

Unit Maintenance

General

On initial start-up and periodically during operation, it will be necessary to perform certain routine service checks. Among these are checking the liquid line sight glasses, taking condensing and suction pressure readings, and checking to see that the unit has normal superheat and subcooling readings. A recommended maintenance schedule is located at the end of this section.

Compressor Maintenance

The scroll compressors are fully hermetic and require no maintenance other than checking oil level.

Lubrication

No routine lubrication is required on AGZ units. The fan motor bearings are permanently lubricated and no further lubrication is required. Excessive fan motor bearing noise is an indication of a potential bearing failure.

Compressor oil should be standard refrigeration mineral oil such as Suniso 3GS.

Electrical Terminals

Electric shock hazard. Turn off all power before continuing with following

WARNING

service.

Condensers

The condensers are air-cooled and constructed of 3/8" (9.5mm) O.D. internally finned copper tubes bonded in a staggered pattern into louvered aluminum fins. Maintenance consists primarily of the routine removal of dirt and debris from the outside surface of the fins and repairing any fin damage. 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. Care should be taken not to damage the fins during cleaning. The coils should be thoroughly rinsed to remove any cleaner residue.

If the service technician determines that the refrigerant circuit contains noncondensables, recovery can be required, strictly following Clean Air Act regulations governing refrigerant discharge to the atmosphere. The Schrader purge valve is located on the vertical coil headers on both sides of the unit at the end opposite the control box. Decorative panels cover the condenser coils and must be removed for servicing. Recover with the unit off, after a shutdown of 15 minutes or longer, to allow air to collect at the top of the coil. Restart and run the unit for a brief period. If necessary, shut the unit off and repeat the procedure. Follow accepted environmentally sound practices when removing refrigerant from the unit.

Optional High Ambient Control Panel

Consists of exhaust fan with rain hood, two inlet screens with filters, necessary controls and wiring to allow operation to 125°F (52°C). The option can be factory or field installed as a kit. Must be used for:

• It must be supplied on units operating at ambient temperatures above 105°F (40°C).

• It is automatically included on units with fan VFD (low ambient option).

• Check inlet filters periodically and clean as required. Verify that the fan is

operational.

64 AGZ 026B through 130B IMM AGZ-7

Liquid Line Sight Glass

The refrigerant sight glasses should be observed periodically. (A weekly observation should be adequate.) A clear glass of liquid indicates that there is subcooled refrigerant charge in the system. Bubbling refrigerant in the sight glass, during stable run conditions, indicates that the system can be short of refrigerant charge. Refrigerant gas flashing in the sight glass could also indicate an excessive pressure drop in the liquid line, possibly due to a clogged filter-drier or a restriction elsewhere in the liquid line. See Table 39 for maximum allowable pressure drops. If subcooling is low, add charge to clear the sight glass. If subcooling is normal (15 to 20 degrees F) and flashing is visible in the sight glass, check the pressure drop across the filter-drier. Subcooling should be checked at full load with 70°F (21.1°C) outdoor air temperature, stable conditions, and all fans running.

An element inside the sight glass indicates the moisture condition corresponding to a given element color. If the sight glass does not indicate a dry condition after about 12 hours of operation, the circuit should be pumped down and the filter-drier changed or verify moisture content by performing an acid test on the compressor oil.

Preventive Maintenance Schedule

OPERATION WEEKLY

General Complete unit log and review (Note 3) X Visually inspect unit for loose or damaged components X Inspect thermal insulation for integrity X Clean and paint as required X

Electrical Check terminals for tightness, tighten as necessary X Clean control panel interior X Visually inspect components for signs of overheating X Verify compressor heater operation X Test and calibrate equipment protection and operating controls X Megger compressor motor * X

Refrigeration Leak test X Check sight glasses for clear flow X Check filter-drier pressure drop (see manual for spec) X Perform compressor vibration test X Acid test oil sample X

Condenser (air-cooled) Clean condenser coils (Note 4) X Check fan blades for tightness on shaft (Note 5) X Check fans for loose rivets and cracks X Check coil fins for damage X

MONTHLY

(Note 1)

Notes:

1. Monthly operations include all weekly operations.

2. Annual (or spring start-up) operations incl udes all weekly and monthly operations.

3. Log readings can be taken d aily for a higher leve l of unit observation.

4. Coil cleaning can be required more frequently in areas with a high level of airborne particles.

5. Be sure fan motors are electrically locked out. * Never Megger motors while they are in a vacuum.

ANNUAL

(Note 2)

IMM AGZ-7 AGZ 026B through 130B 65

Service

WARNING

Service on this equipment is to be performed by qualified refrigeration

personnel familiar with equipment operation, maintenance, correct servicing procedures, and the safety hazards inherent in this work. Causes for repeated tripping of equipment protection controls must be investigated and corr ected.

Disconnect all power before doing any service inside the unit.

Anyone servicing this equipment must comply with the requirements set forth

by the EPA in regards to refrigerant reclamation and venting.

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 sight glass with normal subcooling. The maximum recommended pressure drops across the filter-drier are as follows:

Table 39, Filter-Drier Pressure Drop

PERCENT CIRCUIT

LOADING (%)

100% 10 (69)

75% 8 (55.2) 50% 5 (34.5) 25% 4 (27.6)

MAXIMUM RECOMMENDED PRESSURE

DROP ACROSS FILTER DRIER PSIG (KPA)

The filter-drier should also be changed if the moisture indicating liquid line sight glass indicates excess moisture in the system.

During the first few months of operation the filter-drier replacement can be necessary if the pressure drop across the filter-drier exceeds the values listed in the paragraph above. Any residual particles from the condenser tubing, compressor and miscellaneous components are swept by the refrigerant into the liquid line and are caught by the filter-drier.

Liquid Line Solenoid Valve

The liquid line solenoid valves that shut off refrigerant flow in the event of a power failure do not normally require any maintenance. The solenoids can, however, require replacement of the solenoid coil or of the entire valve assembly.

The solenoid coil can be checked to see that the stem is magnetized when energized by touching a screwdriver to the top of the stem. If there is no magnetization, either the coil is bad or there is no power to the coil.

The solenoid coil can be removed from the valve body without opening the refrigerant piping after pumpdown. For personal safety, shut off and lock out the unit power.

The coil can then be removed from the valve body by simply removing a nut or snapring located at the top of the coil. The coil can then be slipped off its mounting stud for replacement.

To replace the entire solenoid valve follow the steps involved when changing a filterdrier.

66 AGZ 026B through 130B IMM AGZ-7

Evaporator

The evaporators are the direct expansion, shell-and-tube type with refrigerant flowing

through the tubes and water flowing through the shell over the tubes or stainless steel

brazed-plate type. The tubes are internally finned to provide extended surface as well

as turbulent flow of refrigeration through the tubes. Other than cleaning and testing, no

service work should be required on the evaporator.

Refrigerant Charging

AGZ air-cooled chillers are shipped factory charged with a full operating charge of

refrigerant but there can be times that a unit must be recharged at the job site. Follow

these recommendations when field charging. Refer to the unit operating charge found

in the Physical Data Tables.

Unit charging can be done at any steady load condition (preferably at 75 to 100% load)

and at any outdoor temperature (preferably higher than 70°F (21.1°C). Unit must be

allowed to run 5 minutes or longer so that the condenser fan staging is stabilized at

normal operating discharge pressure. For best results, charge with two or more

condenser fans operating on each refrigerant circuit.

The AGZ 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

15°F to 20°F (8.3°C to 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. Once the subcooler is filled, extra charge will not lower the liquid

temperature and does not help system capacity or efficiency.

One of the following three scenarios will be experienced with an undercharged

unit:

1. If the unit is slightly undercharged, the unit will show bubbles in the sight glass. Recharge the unit as described in the charging procedure below.

2. If the unit is moderately undercharged, it will normally trip on freeze protection. Recharge the unit as described in the charging procedure below. However, freezestat trips can also be an indication of low flow or poor heat transfer due to tube fouling. Anti-freeze solutions can also cause freezestat trips.

3. If the unit is severely undercharged, the unit will trip due to lack of liquid flow to the expansion valve. In this case either remove the remaining charge by means of a proper reclamation system and recharge the unit with the proper amount of refrigerant as stamped on the unit nameplate, or add refrigerant through the suction valve on the compressor. If the unit is severely undercharged, the unit can nuisance trip during this charging procedure. If this happens, operate the unit at minimum load, adding charge until the sight glass is clear. Once the unit has enough charge so that it does not trip out, continue with step 2 of the charging procedure below.

IMM AGZ-7 AGZ 026B through 130B 67

Procedure to charge a moderately undercharged AGZ unit:

1. If a unit is low on refrigerant, you must first determine the cause before attempting to recharge the unit. Locate and repair any refrigerant leak. Evidence of oil is a good indicator of leakage, however, oil may not be visible at all leaks. Liquid leak detector fluids work well to show bubbles at medium size leaks but electronic leak detectors can be needed to locate small leaks.

2. Add the charge to the system through the suction shutoff valve or through the Schrader fitting on the tube entering the evaporator between the compressor and the evaporator head.

3. The charge can be added at any load condition between 25-100% load per circuit but at least two fans should be operating per refrigerant circuit, if possible. The suction superheat should be in the 8 to 12 degree F (4.4°C-6.6°C) range.

4. Add sufficient charge to clear the liquid line sight glass and until all flashing stops in the sight glass.

5. Check the unit subcooling value by reading the liquid line pressure and temperature at the liquid line near the filter-drier. The subcooling values should be between 15 and 20 degrees F (8.3 and 11.1 degrees C).

6. With outdoor temperatures above 60°F (15.6°C), all condenser fans should be operating and the liquid line temperature should be within 5°F to 10°F (2.8°C to

5.6°C) of the outdoor air temperature. At 25-50% load, the liquid line temperature should be within 5°F (2.8°C) of outdoor air temperature with all fans on. At 75100% load the liquid line temperature should be within 10°F (5.6°C) of outdoor air temperature with all fans on.

7. Overcharging of refrigerant will raise the compressor discharge pressure due to filling of the condenser tubes with excess refrigerant.

Warranty Statement

Limited Warranty

Consult your local McQuay Representative for warranty details. Refer to Form 93343285Y. To find your local McQuay Representative, go to www.mcquay.com.

68 AGZ 026B through 130B IMM AGZ-7

AGZ Troubleshooting Chart

PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS

1. Main switch. 1. Close switch.

2. Fuse blown. circuit breakers open

Compressor Will Not Run

Compressor Noisy Or Vibrat ing

High Discharge Pressure

Low Discharge Pressure

High Suction Pressure

Low Suction Pressure

Compressor Will Not Stage Up

Compressor Staging Intervals Too Short

3. Thermal overloads tripped

4. Defective contactor or coil. 4. Repair or replace

5. System shutdown by equipment protection devices

6. No cooling required 6. None. Wait until unit c alls f or c ooling.

7. Liquid line solenoid will not open 7. Repair or replace solenoid c oil. Check wiring.

8. Motor electrical trouble 8. Check motor for opens, shorts, or burnout.

9. Loose wiring

1. Low or no refrigerant charge

2. Compressor running in reverse

3. Improper piping support on suction or discharge

4. Worn compressor isolator bus hing

5. Worn Compressor

1. Noncondensables in system

2. System overcharged with refrigerant 2. Remove excess, check liquid subcooling.

3. Optional discharge shutoff valve partially closed 3. Open valve.

4. FanTrol wiring not correct 4. Check FanTrol wiring.

5. Fan not running 5. Check electrical circuit, Check fan m ot or.

6. Dirty condenser coil

7. Air recirculation

1. Refrigerant flood back 1. Correct.

2. Wind blowing into coil at low ambient

3. Faulty condenser temperature regulation 3. Check condenser control operation.

4. Insufficient refrigerant in system

5. Low suction pressure

6. Only one compressor operating

1. Excessive water temperature 1. Check control settings.

2. Excessive load 2. Reduce load or add additional equipment .

3. Expansion valve overfeeding 3. Check remote bulb. Regulate s uperheat .

4. Compressors running in reverse 4. Check for proper phas ing.

1. Rapid load swings 1. Stabilize load.

2. Lack of refrigerant

3. Clogged liquid line filter drier 3. Check pressure drop across filter drier. Replace.

4. Expansion valve malfunctioning 4. Check and reset for proper superheat.

5. Condensing temperature too low

6. Compressor will not unload

7. Insufficient water flow 7. Adjust flow.

8. Evaporator head ring gasket slippage

9. Evaporator dirty

10. Rapid load swings

1. Defective capacity control 1. Replace.

2. Faulty thermostat stage or broken wire 2. Replace.

3. Stages not set for application 3. Res et t herm os t at s et t ing f or applic at ion.

1. Thermostat control band not set properly 1. Set c ont rol band wider.

2. Faulty water temperature sensor 2. Replace.

3. Insufficient water flow

4. Rapid load swings

2. Check electrical circuits and motor windings for shorts or grounds. Invest igat e f or pos s ible overloading. Replace fuse or reset breakers af t er fault is corrected. Check for loose or c orroded connections.

3. Overloads are auto-reset. Check unit closely when unit comes back on line. Allow time for auto-reset.

5. Determine type and cause of shutdown and correct it before resetting equipment protection s witch.

9. Check all wire junctions. Tighten all terminal screws.

1. Repair and recharge

2. Check unit and compressor for correct phasing

3. Relocate, add, or remove hangers

4. Replace

5. Replace

1. Extract the noncondensables with approved procedures.

6. Clean coil.

7. Correct.

2. Shield coil from direct wind, Wind guards are available.

4. Check for leaks. Repair and add charge.

5. See corrective steps for Low Suction Pressure.

6. See corrective steps for Compress or Will Not Stage Up.

2. Check for leaks, repair, add charge. Check liquid sight glass.

5. Check means for regulating condenser temperature.

6. See corrective steps for Compressor Staging Intervals Too Low.

8. Take pressure drop across vessel and cont ac t factory to obtain design pressure drop for that vessel.

9. Clean chemically.

10. Stabilize load.

3. Adjust flow.

4. Stabilize load.

IMM AGZ-7 AGZ 026B through 130B 69

PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS

1. Oil hang-up in piping 1. Review refrigerant piping and correct.

2. Low oil level 2. Check and add oil.

Compressor Oil Level Too High Or Too Low

Compressor Loses Oil

Motor Overload Relays or Circuit Breakers Open

Compressor Thermal Protection Switch Open

3. Loose fitting on oil line 3. Check and tighten system.

4. Level too high 4. Adjust thermal expansion valv e.

5. Insufficient water flow - Level too high 5. Adj us t f low.

6. Excessive liquid in crankcase - Lev el t oo high

7. Short cycling

1. Lack of refrigerant 1. Check for leaks and repair. Add ref rigerant

2. Suction superheat too high 2. Adjust s uperheat .

3. Crankcase heater burnout 3. Replace crankcase heater.

1. Low voltage during high load conditions 1. Check supply voltage for excessive line drop.

2. Defective or grounded wiring in motor 2. Replace compressor motor.

3. Loose power wiring or burnt contactors

4. High condenser temperature

5. Power line fault causing unbalanced voltage

1. Operating beyond design conditions

2. Discharge valve partially shut

3. Blown compressor internal gasket 3. Replace gasket.

4. Voltage range or imbalance 4. Check and correct.

5. High superheat

6. Compressor bearing failure

6. Check crankcase heater. Reset expansion v alve for higher superheat. Check liquid line solenoid valve operation.

7. Stabilize load or increase staging interval.

3. Check all connections and tighten.

4. See corrective steps for High Discharge Pres s ure.

5. Check supply voltage. Notify power company. Do not start until fault is corrected..

1. Add facilities so conditions are within allowable limits.

2. Open valve.

5. Adjust to correct superheat.

6. Replace compressor .

70 AGZ 026B through 130B IMM AGZ-7

This document contains the most current pr oduct information as of this printing. For the most up-todate product information, please go to www.mcquay.com.

Post Office 2510, Staunton, Virginia 24402 USA

• (800) 432-1342 • www.mcquay.com IMM AGZ-7 (2/05)