McQuay AGS120CS, AGS 210CS/H, AGS120CH, AGS210CS, AGS210CH Installation And Maintenance Manual

Installation and Maintenance Manual

IMM AGS-2

Air-Cooled Screw Compressor Chiller

AGS 120CS/H - AGS 210CS/H, Packaged

AGS 120CM/B – AHS 210CM/B, Remote Evaporator

60 Hertz, R-134a

Group: Chiller

Part Number: 331373301

Date: July 2008

Supersedes: March 2008

Table of Contents

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

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

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

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

Installation and Start-up ..........................................4

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

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

Service Access...................................................5

Clearance Requirements....................................6

Restricted Airflow ...............................................7

Vibration Isolators.............................................13

Chilled Water Pump .........................................19

Water Piping ....................................................19

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

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

Evaporator Freeze Protection...........................21

Operating Limits: ..............................................22

Flow Switch ......................................................22

Refrigerant Charge...........................................23

Glycol Solutions ...............................................23

Water Flow and Pressure Drop.............................24

Physical Data, Standard Efficiency .......................26

Physical Data, High Efficiency ..............................27

Dimensional Data .................................................29

Electrical Data ......................................................32

Field Wiring ......................................................32

Field Wiring Diagram ............................................42

BAS Interface ...................................................47

Remote Operator Interface Panel .....................47

Remote Evaporator...............................................48

Manufactured in an ISO Certified Facility

"McQuay" is a registered trademark of McQuay International

Information covers the McQuay International products at the time of publication and we reserve the right

 The following are trademarks or registered trademarks of their respective companies: BACnet from ASHRAE; LONM

LONW

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

ORKS

from Echelon Corporation; GeneSys, McQuay and MicroTech II from McQuay International.

Solid State Starters .............................................. 63

Component Location ............................................ 70

System Maintenance ............................................ 74

Warranty Statement ............................................. 77

Service ................................................................. 77



2004 McQuay International

Piping Layout ................................................... 48

Field Wiring (Remote Evaporator) .................... 49

Kit Components ...............................................49

Refrigerant Line Sizing..................................... 49

Dimensions, Unit with Remote Evaporator ....... 51

Vibration Isolators, Remote Evaporator............58

Physical Data, Standard Efficiency...................60

Physical Data, High Efficiency.......................... 61

Major Component Location .............................. 70

Power Panel..................................................... 72

Control Panel ................................................... 73

General ............................................................ 74

Compressor Maintenance ................................ 74

Lubrication .......................................................74

Electrical Terminals.......................................... 75

Condensers...................................................... 75

Liquid Line Sight Glass .................................... 75

Lead-Lag.......................................................... 76

Preventative Maintenance Schedule ................76

Liquid Line Filter-Driers .................................... 77

Compressor Slide Valves ................................. 78

Electronic Expansion Valve (EXV).................... 78

Evaporator .......................................................79

Charging Refrigerant........................................ 79

Standard Controls ............................................80

Controls, Settings and Functions ..................... 82

Troubleshooting Chart......................................83

Periodic Maintenance Log................................84

Unit controllers are LONM

with an optional LONW

communications module

ARK

ARK and

certified

ORKS

2 IMM AGS-2

Introduction

General Description

McQuay refrigerating units that include the latest in engineered components arranged to provide a compact and efficient unit. Each unit is completely assembled, factory wired, evacuated, charged, tested and comes complete and ready for installation. Each unit consists of two air-cooled condenser sections with integral subcooler sections, two semi-hermetic, singlescrew compressors with solid-state starters, a two-circuit shell-and-tube direct expansion evaporator, and complete refrigerant piping. Each compressor has an independent refrigeration circuit. Liquid line components included are manual liquid line shutoff valves, charging ports, filter-driers, sight-glass/moisture indicators, solenoid valves and electronic expansion valves. A discharge shutoff valve is included and a compressor suction shutoff valve is optional. Other features include compressor heaters, evaporator heaters for freeze protection, automatic one-time pumpdown of each refrigerant circuit upon circuit shutdown, and an advanced fully integrated microprocessor control system.

AGS units are divided between standard efficiency (model numbers ending in “0”) and high efficiency units (ending in “5”). The high efficiency units have certain larger components.

The units are optionally available with the evaporator shipped separately for remote mounting indoors.

A high ambient option is required for operation in ambient temperatures above 115°F (46°C), or 105°F (41°C) on units equipped with optional fan VFDs.

Information on the operation of the unit MicroTech II controller is in the OM AGS manual.

GeneSys



air-cooled water chillers are complete, self-contained automatic

Nomenclature

Rotary Screw Compressor

“0” Last Digit=Std. Efficiency

“5” Last Digit=High Efficiency

Air-Cooled

Global

Nominal Tons

A G S - XXX C S

S=Standard Ambient, Packaged Unit M=Standard Ambient, Remote Evaporator H=Packaged with High Ambient Option B=Remote with High Ambient Option.

Design Vintage

Inspection

When the equipment is received, carefully check all items against the bill of lading to check for a complete shipment. Check all units for damage upon arrival. All shipping damage must be reported to the carrier and a claim must be filed with the carrier. Check the unit’s serial plate before unloading the unit to be sure that it agrees with the power supply available. Physical damage to unit after acceptance is not the responsibility of McQuay International.

Note: Unit shipping and operating weights are shown in the Physical Data Tables on page 26 for packaged units and page 60 for remote evaporator models.

IMM AGS-2 3

Installation and Start-up

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

Note: Installation and maintenance are to be performed only by qualified personnel who are

familiar with local codes and regulations, and experienced with this type of equipment.

Start-up by McQuayService is included on all units sold for installation within the USA and Canada and must be performed by them to initiate the standard limited product warranty. Two-week prior notification of start-up is required. The contractor should obtain a copy of the Start-up Scheduled Request Form from the sales representative or from the nearest office of McQuayService.

Escaping refrigerant can displace air and cause suffocation. Immediately evacuate

and ventilate the equipment area. If the unit is damaged, follow Environmental

Protection Agency (EPA) requirements. Do not expose sparks, arcing equipment, open

flame or other ignition source to the refrigerant.

Handling

Avoid rough handling shock due to impact or dropping the unit. Do not push or pull the unit.

WARNING

Never allow any part of the unit to fall during unloading or moving, as this can result in serious damage.

To lift the unit, lifting tabs with 2½" (64 mm) diameter holes are provided on the base of the unit. All lifting holes must be used when lifting the unit. Spreader bars and cables should be arranged to prevent damage to the condenser coils or unit cabinet (see Figure 1).

DANGER

Improper lifting or moving unit can result in property damage, severe

personal injury or death. Follow rigging and moving instructions carefully.

Figure 1, Required Lifting Method

NOTES:

1. All rigging points on a unit must be used. See location and weights at lifting points beginning on page 13 for a specific size unit.

2. Crosswise and lengthwise spreader bars must be used to avoid damage to unit. Lifting cables from the unit mounting holes up must be vertical.

3. The number of condenser sections, and fans can vary from this diagram.

4 IMM AGS-2

Location

Locate the unit carefully to provide proper airflow to the condenser. (See Figure 2 on page 6 for required clearances).

Due to the shape of the condenser coils on the AGS chillers, it is recommended that the unit be oriented so that prevailing winds blow parallel to the unit length, thus minimizing the wind effect on condensing pressure and performance. If low ambient temperature operation is expected, optional louvers should be installed if the unit has no protection against prevailing winds.

Using less clearance than shown in Figure 2 can cause discharge air recirculation to the condenser and could have a significant detrimental effect on unit performance.

See Restricted Airflow beginning on page 7 for further information.

For pad-mounted units, it is recommended that the unit be raised a few inches with suitable supports, located at least under the mounting locations, to allow water to drain from under the unit and to facilitate cleaning under it

Service Access

Compressors, filter-driers, and manual liquid line shutoff valves are accessible on each side or end of the unit. The evaporator heater is located on the barrel.

The control panels are located on the end of the chiller. The left-hand control box contains the unit and circuit microprocessors as well as transformers, fuses and terminal. The righthand panel contains a circuit breaker and solid state starter for each compressor plus fuses, fan VFD (optional) and fan contactors. A minimum of four feet of clearance is required in front of the panels.

The side clearance required for airflow provides sufficient service clearance.

On all AGS units, the condenser fans and motors can be removed from the top of the unit. The complete fan/motor assembly can be removed for service. The fan blade must be removed for access to wiring terminals at the top of the motor.

WARNING

Disconnect, lockout and tag all power to the unit before servicing condenser fan

motors or compressors.

Failure to do so can cause bodily injury or death.

Do not block access to the sides or ends of the unit with piping or conduit. These areas must be open for service access. Do not block any access to the control panels with a fieldmounted disconnect switches.

IMM AGS-2 5

Clearance Requirements

5ft (1.5m)

3ft (1m) for service

Air Flo

w

No obstructions allowed

above unit at any heigh

t

See notes 2 & 4

concerning wall

height at unit sides.

6ft (1.8m)

Figure 2, Clearance Requirements, AGS 120C – AGS 210C

if open fence or 50% open wall if solid wall (see note 3 for pit)

4ft (1.2m) For electric panel access

if open fence or 50% open wall if solid wall (see note 3 for pit)

No obstructions. Recommended area required for unit operation, air flow and maintenance access.

See Note 5

Wall or Fence

Notes:

1. Minimum side clearance between two units is 12 feet (3.7 meters).

2. Unit must not be installed in a pit or enclosure that is deeper or taller than the height of the unit

unless extra clearance is provided per note 4.

3. Minimum clearance on each side is 8 feet (2.4 meters) when installed in a pit no deeper than the

unit height.

4. Minimum side clearance to a side wall or building taller than the unit height is 6 feet (1.8 meters),

provided no solid wall above 6 feet (1.8 meters) is closer than 12 feet (3.7 meters) to the opposite side of the unit.

5. Do not mount electrical conduits where they can block service access to compressor controls,

refrigerant driers or valves.

6. There must be no obstruction of the fan discharge.

7. Field installed switches must not interfere with service access or airflow.

8. The evaporator can be removed from the side of the unit and may require the temporary removal

of a coil section support post. See dimension drawings beginning on page 29 for details.

9. If the airflow clearances cannot be met, see the following pages on Restricted Airflow.

6 IMM AGS-2

Restricted Airflow

General

The clearances required for design operation of AGS 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.

The McQuay AGS chillers have several features that can mitigate the problems attributable to restricted airflow.

• The shape of the condenser section allows inlet air for these coils to come in from both

sides and the bottom. All the coils on one side serve one compressor. Every compressor always has its own independent 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 (at reduced capacity) as long as possible, rather than allowing a shut-off on high discharge pressure.

Figure 3, Coil and Fan Arrangement

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 will adjust the unit operation to remain online until a less severe condition is reached.

IMM AGS-2 7

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

5 ft.

(1.5m)

(1.8m)

The existence of a screening wall, or the wall of a building, in close proximity to an aircooled 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.

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 4, Unit Adjacent to Wall

D

H

Figure 5, Adjustment Factors

(1.5m)

6 ft.

(1.8m)

5 ft.

6 ft.

8 IMM AGS-2

Case 2, Two Units Side By Side

Two or more units sited side by side are common. If spaced closer than 12 feet (3.7 meters), or 8 feet (2.5 meters), 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 6, Two Units Side by Side

Figure 7, Adjustment Factor

3.0

2.0

1.0

0

9

(2.7)

10

(3.0)

11

(3.3)

12

(3.6)

6.0

4.0

2.0

0

9

(2.7)

10

(3.0)

11

(3.3)

12

(3.6)

IMM AGS-2 9

Case 3, Three or More Units Side By Side

When three or more units are side by side, the outside units (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 chiller 2 in this case) are influenced on both sides and must be adjusted by the factors shown below.

Figure 8, Three or More Units

Chiller 1 Chiller 2 Chiller 3

Figure 9, Adjustment Factor

4.0

3.0

2.0

1.0

0

15

(4.6)

16

(4.9)

17

(5.2)

18

(5.5)

8.0

6.0

4.0

2.0

0

15

(4.6)

16

(4.9)

17

(5.2)

18

(5.5)

10 IMM AGS-2

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 must 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 10, Open Screening Walls

Figure 11, Wall Free Area vs. Distance

IMM AGS-2 11

Case 5, Pit/Solid Wall Installation

Pit installations can cause operating problems and great care must 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 in this case 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 the McQuay sales office prior to installation to discuss whether it has sufficient airflow characteristics. The installation design engineer must approve the work and is responsible for design criteria.

Figure 12, Pit Installation

Figure 13, Adjustment Factor

12 IMM AGS-2

Vibration Isolators

“G”

“E”

“F”

“D”

“C”

“A”

“B”

COG

44.00

“CC”

MM

Vibration isolators are recommended for all roof-mounted installations or wherever vibration transmission is a consideration. Initially installed the unit on shims or blocks at the illustrated "free height" of the isolator that is six inches for the McQuay isolators shown. When all piping, wiring, flushing, charging, etc. is complete, adjust the springs upward to load them and to provide clearance to free the blocks, which are then removed.

Installation of spring isolators requires flexible pipe connections and at least three feet of conduit flex tie-ins. Support piping and conduit independently from the unit to not stress connections.

There are separate weight and isolator tables for copper fin coils. All other coil types, such as ElectroFin and Blackfin, use the aluminum fin data.

Isolator bolting: the unit base is an enclosed box design and may have six or ten mounting locations, depending on the date of manufacture. Mounting locations M1 and M2 at dimension “C” and locations M5 and M6 at dimension “E” are not used. Locations MM1, MM2, M3, M4, MM5 and MM6 have access holes on top of the base, above the lower mounting holes and should be used for all isolator types. One simple method of bolting the base to the isolators (if required) is to remove the short threaded studs, usually provided with isolators, and replace them with eight-inch threaded rod. The rod will extend above the top of the base and a washer and nut can then be easily attached.

Figure 14, Mounting and Lifting Dimensions

M6

M5

MM5

L3

L4

“EE”

M4

M3

MM2MM6

L2

L1

M2

1

M1

X O

B L O R

T N O C

330712801D0400_R0A

NOTE: Dimensions are on the following page.

IMM AGS-2 13

Table 1, Dimensions

MODEL A B C CC D E EE F G

120 36.00 136.60 12.00 21.00 57.30 174.60 165.60 71.49 186.60 125 36.00 168.85 12.00 21.00 69.25 212.80 203.80 86.54 224.80 130 36.00 136.60 12.00 21.00 57.30 174.60 165.60 71.49 186.60 135 36.00 168.85 12.00 21.00 69.25 212.80 203.80 86.54 224.80 140 36.00 136.60 12.00 21.00 57.30 174.60 165.80 71.49 186.60 145 36.00 168.85 12.00 21.00 69.25 212.80 203.80 86.66 224.80 160 36.00 136.60 12.00 21.00 57.30 174.60 165.60 74.37 186.60 165 36.00 189.00 12.00 21.00 84.00 251.00 242.00 105.17 263.00 170 36.00 168.85 12.00 21.00 69.25 212.80 203.80 89.65 224.80 175 36.00 189.00 12.00 21.00 84.00 251.00 242.00 105.17 263.00 180 36.00 168.85 12.00 21.00 69.25 212.80 203.80 89.65 224.80 190 36.00 168.85 12.00 21.00 69.25 212.80 203.80 89.65 224.80 195 36.00 189.00 12.00 21.00 84.00 251.00 242.00 105.17 263.00 210 36.00 189.00 12.00 21.00 84.00 251.00 242.00 105.17 263.00

NOTES:

1. Use location “C”, not “CC”, for mounting.

2. Center of gravity (F) is calculated from shipping weight

3. Dimensions are in inches.

4. Mounting holes are 0.75 inch diameter and have center located 2.0 inches from the outside edge.

Table 2, Lifting and Mounting Weights, Packaged, Aluminum Fins, AGS-CS/H

AGS

120 2919 1324 1591 722 1749 793 1645 746 1333 605 9452 4287 9020 4091 125 3161 1434 1941 880 1996 905 1887 856 1583 718 10930 4958 10205 4629 130 2919 1324 1591 722 1749 793 1645 746 1333 605 9452 4287 9020 4091 135 3161 1434 1941 880 1996 905 1887 856 1583 718 10930 4958 10205 4629 140 2919 1324 1591 722 1749 793 1645 746 1333 605 9452 4287 9020 4091 145 3075 1395 1896 860 1916 869 1810 821 1517 688 10485 4756 9942 4510 160 2933 1330 1809 821 1802 817 1742 790 1561 708 10209 4631 9484 4302 165 3017 1369 2489 1129 2137 969 2038 924 1789 811 11928 5411 11011 4995 170 3269 1483 2007 910 1945 882 1904 864 1790 812 11277 5115 10552 4786 175 3017 1369 2489 1129 2137 969 2038 924 1789 811 11928 5411 11011 4995 180 3269 1483 2007 910 1945 882 1904 864 1790 812 11277 5115 10552 4786 190 3269 1483 2007 910 1945 882 1904 864 1790 812 11277 5115 10552 4786 195 3017 1369 2489 1129 2137 969 2038 924 1789 811 11928 5411 11011 4995 210 3017 1369 2489 1129 2137 969 2038 924 1789 811 11928 5411 11011 4995

Lifting Weights Mounting Weights

L1, L2 L3, L4 MM1, MM2 M3, M4 MM5, MM6

lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg

Operating

Weight

Shipping

Weight

Table 3, Lifting and Mounting Weights, Packaged Copper Fins, AGS-CS/H

AGS

120

125

130

135

140

145

160

165

170

175

180

190

195

210

Lifting Weights Mounting Weights

L1, L2 L3, L4 MM1, MM2 M3, M4 MM5, MM6

lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg

3557 1613 2229 1011 2174 986 2070 939 1758 798 10728 4866 10296 4670

3959 1796 2739 1242 2528 1147 2419 1097 2115 959 12526 5682 11801 5353

3557 1613 2229 1011 2174 986 2070 939 1758 798 10728 4866 10296 4670

3959 1796 2739 1242 2528 1147 2419 1097 2115 959 12526 5682 11801 5353

3557 1613 2229 1011 2174 986 2070 939 1758 798 10728 4866 10296 4670

3873 1757 2694 1222 2448 1110 2342 1062 2049 929 12081 5480 11538 5234

3571 1620 2447 1110 2227 1010 2167 983 1986 901 11485 5210 10760 4881

3975 1803 3447 1564 2776 1259 2677 1214 2428 1101 13844 6280 12927 5864

4067 1845 2805 1272 2477 1124 2436 1105 2322 1053 12873 5839 12148 5510

3975 1803 3447 1564 2776 1259 2677 1214 2428 1101 13844 6280 12927 5864

4067 1845 2805 1272 2477 1124 2436 1105 2322 1053 12873 5839 12148 5510

3975 1803 3447 1564 2776 1259 2677 1214 2428 1101 13844 6280 12927 5864

Operating

Weight

Shipping

Weight

14 IMM AGS-2

Table 4, Lifting & Mounting Weights, Remote Evaporator, Aluminum Fins, AGS-CM/B

AGS

120 125 130 135 140 145 160 165 170 175 180 190 195 210

Lifting Weights Mounting Weights

L1, L2 L3, L4 MM1, MM2 M3, M4 MM5, MM6

lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg

3029 1374 1021 463 1780 807 1521 690 749 340 8100 3674 8100 3674 3169 1437 1307 593 1938 879 1659 753 879 399 8952 4061 8952 4061 3029 1374 1021 463 1780 807 1521 690 749 340 8100 3674 8100 3674 3169 1437 1307 593 1938 879 1659 753 879 399 8952 4061 8952 4061 3029 1374 1021 463 1780 807 1521 690 749 340 8100 3674 8100 3674 3169 1437 1307 593 1938 879 1659 753 879 399 8952 4061 8952 4061 3029 1374 1021 463 1780 807 1521 690 749 340 8100 3674 8100 3674 3196 1450 1590 721 2099 952 1764 800 923 419 9571 4341 9571 4341 3169 1437 1307 593 1938 879 1659 753 879 399 8952 4061 8952 4061 3196 1450 1590 721 2099 952 1764 800 923 419 9571 4341 9571 4341 3169 1437 1307 593 1938 879 1659 753 879 399 8952 4061 8952 4061 3169 1437 1307 593 1938 879 1659 753 879 399 8952 4061 8952 4061 3196 1450 1590 721 2099 952 1764 800 923 419 9571 4341 9571 4341 3196 1450 1590 721 2099 952 1764 800 923 419 9571 4341 9571 4341

Operating

Weight

Shipping

Weight

Table 5, Lifting & Mounting Weights, Remote Evaporator, Copper Fins, AGS-CM/B

AGS

120

125

130

135

140

145

160

165

170

175

180

190

195

210

Lifting Weights Mounting Weights

L1, L2 L3, L4 MM1, MM2 M3, M4 MM5, MM6

lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg

3667 1663 1659 753 2205 1000 1946 883 1174 533 9376 4253 9376 4253

3967 1799 2105 955 2470 1120 2191 994 1411 640 10548 4785 10548 4785

3667 1663 1659 753 2205 1000 1946 883 1174 533 9376 4253 9376 4253

3967 1799 2105 955 2470 1120 2191 994 1411 640 10548 4785 10548 4785

3667 1663 1659 753 2205 1000 1946 883 1174 533 9376 4253 9376 4253

3967 1799 2105 955 2470 1120 2191 994 1411 640 10548 4785 10548 4785

3667 1663 1659 753 2205 1000 1946 883 1174 533 9376 4253 9376 4253

4154 1884 2548 1156 2738 1242 2403 1090 1562 708 11487 5211 11487 5211

3967 1799 2105 955 2470 1120 2191 994 1411 640 10548 4785 10548 4785

4154 1884 2548 1156 2738 1242 2403 1090 1562 708 11487 5211 11487 5211

3967 1799 2105 955 2470 1120 2191 994 1411 640 10548 4785 10548 4785

4154 1884 2548 1156 2738 1242 2403 1090 1562 708 11487 5211 11487 5211

Operating

Weight

Shipping

Weight

IMM AGS-2 15

Table 6, Spring Vibration Isolators, Aluminum Fin, AGS-CS/H

AGS

Model

120

125

130

135

140

145

160

165

170

175

180

190

195

210

M1 M2 M3 M4 M5 M6 Kit Number

CP2-28 CP2-28 CP2-28 CP2-28 CP2-27 CP2-27

GREEN GREEN GREEN GREEN ORANGE ORANGE

CP2-31 CP2-31 CP2-31 CP2-31 CP2-28 CP2-28

GRAY GRAY GRAY GRAY GREEN GREEN

CP2-28 CP2-28 CP2-28 CP2-28 CP2-27 CP2-27

GREEN GREEN GREEN GREEN ORANGE ORANGE

CP2-31 CP2-31 CP2-31 CP2-31 CP2-28 CP2-28

GRAY GRAY GRAY GRAY GREEN GREEN

CP2-28 CP2-28 CP2-28 CP2-28 CP2-27 CP2-27

GREEN GREEN GREEN GREEN ORANGE ORANGE

CP2-31 CP2-31 CP2-31 CP2-31 CP2-28 CP2-28

GRAY GRAY GRAY GRAY GREEN GREEN

CP2-28 CP2-28 CP2-28 CP2-28 CP2-28 CP2-28

GREEN GREEN GREEN GREEN GREEN GREEN

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

Mounting Location

330904101

330904102

330904101

330904102

330904101

330904102

330904103

330904104

Table 7, Neoprene-in-Shear Isolators, Aluminum Fin, AGS-CS/H

AGS

Model

120

125

130

135

140

145

160

165

170

175

180

190

195

210

M1 M2 M3 M4 M5 M6 Kit Number

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, BLACK RP-4, BLACK 330904111

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED 330904112

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, BLACK RP-4, BLACK 330904111

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED 330904112

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, BLACK RP-4, BLACK 330904111

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED

Mounti ng Location ( See Footprint D ra wings, page 13)

330904112

16 IMM AGS-2

Table 8, Spring Vibration Isolators, Copper Fin, AGS-CS/H

AGS

Model

120

125

130

135

140

145

160

165

170

175

180

190

195

210

M1 M2 M3 M4 M5 M6 Kit Number

CP2-31 CP2-31 CP2-31 CP2-31 CP2-28 CP2-28

GRAY GRAY GRAY GRAY GREEN GREEN

CP2-32 CP2-32 CP2-31 CP2-31 CP2-31 CP2-31

WHITE WHITE GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-28 CP2-28

GRAY GRAY GRAY GRAY GREEN GREEN

CP2-32 CP2-32 CP2-31 CP2-31 CP2-31 CP2-31

WHITE WHITE GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-28 CP2-28

GRAY GRAY GRAY GRAY GREEN GREEN

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-32 CP2-32 CP2-32 CP2-32 CP2-31 CP2-31

WHITE WHITE WHITE WHITE GRAY GRAY

CP2-32 CP2-32 CP2-31 CP2-31 CP2-31 CP2-31

WHITE WHITE GRAY GRAY GRAY GRAY

CP2-32 CP2-32 CP2-32 CP2-32 CP2-31 CP2-31

WHITE WHITE WHITE WHITE GRAY GRAY

CP2-32 CP2-32 CP2-31 CP2-31 CP2-31 CP2-31

WHITE WHITE GRAY GRAY GRAY GRAY

CP2-32 CP2-32 CP2-31 CP2-31 CP2-31 CP2-31

WHITE WHITE GRAY GRAY GRAY GRAY

CP2-32 CP2-32 CP2-32 CP2-32 CP2-31 CP2-31

WHITE WHITE WHITE WHITE GRAY GRAY

CP2-32 CP2-32 CP2-32 CP2-32 CP2-31 CP2-31

WHITE WHITE WHITE WHITE GRAY GRAY

Mounting Location

330904102

330904105

330904102

330904105

330904102

330904104

330904106

330904105

330904106

330904105

330904106

Table 9, Neoprene-in-Shear Isolators, Copper Fin, AGS-CS/H

AGS

Model

120

125

130

135

140

145

160

165

170

175

180

190

195

210

M1 M2 M3 M4 M5 M6 Kit Number

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED

RP-4, GRN RP-4, GRN RP-4, GRN RP-4, GRN RP-4, RED RP-4, RED 330904113

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED 330904112

RP-4, GRN RP-4, GRN RP-4, GRN RP-4, GRN RP-4, RED RP-4, RED 330904113

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED

RP-4, GRN RP-4, GRN RP-4, GRN RP-4, GRN RP-4, RED RP-4, RED

IMM AGS-2 17

Mounti ng Location ( See Footprint D ra wing, pg. 13)

330904112

330904113

Table 10, Spring Flex Isolators

9.0

(228.6)

9.0

(228.6)

9.0

(228.6)

9.0

(228.6)

Dimensions

In. (mm)

7.7

(195.6)

7.7

(195.6)

7.7

(195.6)

7.7

(195.6)

2.7

(68.6)

2.7

(68.6)

2.7

(68.6)

2.7

(68.6)

5.75

(146.0)

5.75

(146.0)

5.75

(146.0)

5.75

(146.0)

Housing

Part Number

226103B-00 (2) 226117A-00

226103B-00 (2) 226118A-00

226103B-00 (2) 226119A-00

226103B-00 (2) 226120A-00

Spring

Part Number

Housing

CP-2-27 Orange

CP-2-28 Green

CP-2-31 Gray

CP-2-32 White

Spring

Color

Max. Load

Each

Lbs. (kg)

1500

(681)

1800

(815)

2200

(998)

2600

(1180)

Defl.

In. (mm)

0.5

(12.7)

0.5

(12.7)

0.5

(12.7)

0.5

(12.7)

A B C D E

10.2

(259.1)

10.2

(259.1)

10.2

(259.1)

10.2

(259.1)

Table 11, Neoprene-in-Shear Isolators

5.0

Dimensions

In. (mm)

0.56

(14.2)

0.56

(14.2)

0.56

(14.2)

0.25 (6.4)

1.6

(41.1)

1.6

(41.1)

1.6

(41.1)

6.5

(165.1)

6.5

(165.1)

6.5

(165.1)

4.6

(116.8)

4.6

(116.8)

4.6

(116.8)

McQuay

Part Number

216398A-04

216398A-01

216398A-03

Type

RP-4 Black

RP-4 Red

RP-4 Green

Note (1) "D" is the m ou nt ing hole diam eter.

Max. Load

Each

Lbs. (kg)

1500

(681)

2250

(1019)

3300

(1497)

Defl.

In. (mm)

0.25 (6.4)

3.75

(95.3)

3.75

(95.3)

3.75

(95.3)

A B C D (1) E H L W

0.5

(12.7)

(127.0)

0.5

(12.7)

(127.0)

0.5

(12.7)

(127.0)

Figure 15, Spring Flex Mountings Figure 16, Single Neoprene-in-

Shear Mounting

18 IMM AGS-2

Chilled Water Pump

It is recommended that the chilled water pumps' starters be wired to, and controlled by, the chiller's microprocessor. The controller will energize the pump whenever at least one circuit on the chiller is enabled to run, whether there is a call for cooling or not. Wiring connection points are shown in Figure 23 on page 42.

Water Piping

Due to the variety of piping practices, follow the recommendations of local authorities. They can supply the installer with the proper building and safety codes required for a proper installation.

Design the piping with a minimum number of bends and changes in elevation to keep system cost down and performance up. It should contain:

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

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

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

low parts in the system. The evaporator should not be the highest point in the piping system.

4. Some means of maintaining adequate system water pressure (i.e., expansion tank or

regulating valve).

5. Water temperature and pressure indicators located at the evaporator inlet and outlet to

aid in unit servicing. Any connections should be made prior to filling the system with water.

6. A strainer to remove foreign matter from the water before it enters the pump. Place the

strainer far enough upstream to prevent cavitation at the pump inlet (consult pump manufacturer for recommendations). The use of a strainer will prolong pump life and help maintain high system performance levels.

NOTE

the inlet of the evaporator. This will aid in preventing foreign material from entering the evaporator and causing damage or decreasing its performance. Care must also be exercised if welding pipe or flanges to the evaporator connections to prevent any weld slag from entering the vessel.

7. Any water piping to the unit must be protected to prevent freeze-up if below freezing

temperatures are expected.

:

A 40 mesh strainer must also be placed in the supply water line just prior to

CAUTION

If a separate disconnect is used for the 115V supply to the unit, it should power the entire control circuit, not just the evaporator heaters. It should be clearly marked so that it is not accidentally shut off during cold seasons. Freeze damage to the evaporator could result. If the evaporator is drained for winter freeze protection, the heaters must be de-energized to prevent burnout.

8. If the unit is used as a replacement chiller on a previously existing piping system, flush

the system thoroughly prior to unit installation. Perform regular chilled water analysis and chemical water treatment immediately at equipment start-up.

IMM AGS-2 19

9. In the event glycol is added to the water system as a late addition for freeze protection,

recognize that the refrigerant suction pressure will be lower, cooling performance less, and water side pressure drop greater. If the percentage of glycol is large, or if propylene is employed in lieu of ethylene glycol, the added pressure drop and loss of performance could be substantial.

10. For ice making or low temperature glycol operation, a different freezestat pressure

value is usually required. The freezestat setting can be manually changed through the MicroTech II controller.

Make a preliminary leak check prior to insulating the water piping and filling the system.

Include a vapor barrier with the piping insulation to prevent moisture condensation and possible damage to the building structure. It is important to have the vapor barrier on the outside of the insulation to prevent condensation within the insulation on the cold surface of the pipe.

System Water Volume

It is important to have adequate water volume in the system to provide an opportunity for the chiller to sense a load change, adjust to the change and stabilize. As the expected load change becomes more rapid, a greater water volume is needed. The system water volume is the total amount of water in the evaporator, air handling products and chilled water piping. If the water volume is too low, operational problems can occur including rapid compressor cycling, rapid loading and unloading of compressors, erratic refrigerant flow in the chiller, improper motor cooling, shortened equipment life and other undesirable consequences.

For normal comfort cooling applications where the cooling load changes relatively slowly, a minimum system volume of three minutes times the flow rate (gpm) is recommend. For example, if the design chiller flow rate is 400 gpm, we recommend a minimum total system volume of 1200 gallons (400 gpm x 3 minutes).

For process applications, such as a quenching tank, where the cooling load can change rapidly, additional system water volume is needed. The load would be very stable until the hot material is immersed in the water tank. Then, the load would increase drastically. For this type of application, system volume can need to be increased.

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.

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 slow, and the minimum and maximum flow rates for the vessel 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 between the minimum and maximum values listed on page 25. If flow drops below the minimum allowable, large reductions in heat transfer can occur. If the flow exceeds the maximum rate, excessive pressure drop and tube erosion can occur.

20 IMM AGS-2

Evaporator Freeze Protection

AGS chillers are equipped with thermostatically controlled evaporator heaters that help protect against freeze-up down to -20°F (-28°C).

NOTE: The heaters come from the factory connected to the control power circuit. The control power can be rewired in the field to a separate 115V supply (do not wire directly to the heater). See the field wiring diagram on page 42. If this is done, mark the disconnect switch clearly to avoid accidental deactivation of the heater during freezing temperatures. Exposed chilled water piping also requires protection.

For additional protection, at least one of the following procedures should be used during periods of sub-freezing temperatures:

1. Adding of a concentration of a glycol anti-freeze with a freeze point 10 degrees F below

the lowest expected temperature. This will result in decreased capacity and increased pressure drop.

Note: Do not use automotive grade antifreezes as they contain inhibitors harmful to chilled water systems. Use only glycols specifically designated for use in building cooling systems.

2. Draining the water from outdoor equipment and piping and blowing the chiller tubes

dry from the chiller. Do not energize the chiller heater when water is drained from the vessel.

CAUTION

If fluid is absent from the evaporator, the evaporator heater must be de-energized

to avoid burning out the heater and causing damage from the high temperatures.

1. Providing operation of the chilled water pump, circulating water through the chilled

water system and through the evaporator.

Table 12, Freeze Protection

Temperature

°°°°F (°°°°C)

20 (6.7) 16 18 11 12

10 (-12.2) 25 29 17 20

0 (-17.8) 33 36 22 24

-10 (-23.3) 39 42 26 28

-20 (-28.9) 44 46 30 30

-30 (-34.4) 48 50 30 33

-40 (-40.0) 52 54 30 35

-50 (-45.6) 56 57 30 35

-60 (-51.1) 60 60 30 35

Notes:

1. These figures are examples only and cannot be appropriate to every situation. Generally, for an extended margin of protection, select a temperature at least 15°F lower than the expected lowest ambient temperature. Inhibitor levels should be adjusted for solutions less than 25% glycol.

2. Glycol of less than 25% concentration is not recommended because of the potential for bacterial growth and loss of heat transfer efficiency.

For Freeze Protection For Burst Protection

Ethylene Glycol Propylene Glycol Ethylene Glycol Propylene Glycol

Percent Volume Glycol Concentration Required

IMM AGS-2 21

Operating Limits:

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

Maximum operating ambient temperature, see below

Minimum operating ambient temperature (standard), 35°F (2°C)

Minimum operating ambient temperature (optional low-ambient control), 0°F (-18°C)

Leaving chilled water temperature, 40°F to 60°F (4°C to 16°C)

Leaving chilled fluid range (with anti-freeze), 20°F to 60°F (-7°C to 16°C). Unloading is

not permitted with fluid leaving temperatures below 30°F (-1°C).

Operating Delta-T range, 6 degrees F to 16 degrees F (10.8 C to 28.8 C)

Maximum operating inlet fluid temperature, 76°F (24°C)

Maximum startup inlet fluid temperature, 90°F (32°C)

Maximum non-operating inlet fluid temperature, 100°F (38°C)

NOTE: Contact the local McQuay sales office for operation outside any of these limits.

Maximum Operating Ambient Temperatures

Standard Efficiency, designated by a "0" as the last digit in the model number (such as AGS 170C) are designed for operation up to 125 degrees. Significant unloading above 115 degrees can occur depending on a variety of factors. Contact your sales representative for performance above 115 degrees. Additional unloading can result with leaving water temperatures above 45 degrees.

High Efficiency, designated by a "5" as the last digit in the model number (such as AGS 175C) are designed for operation up to 125 degrees without unloading for leaving water temperatures between 40 and 45 degrees Fahrenheit. Contact your sales representative for evaporator duty outside of this range. The High Efficiency models have larger components, and/or more fans than the comparable Standard Efficiency models. This results in improved efficiency and the ability to operate at higher ambient air temperatures.

High Ambient Option, A factory-installed option that provides components allowing operation in high ambient temperature locations. It can be applied to any unit and is mandatory on:

1. All units with the optional VFD low ambient control.

2. All units that can have operating ambient temperatures above 115°F (46°C).

Flow Switch

A flow switch must be included in the chilled water system to prove that there is adequate water flow to the evaporator before the unit can start. It also serves to shut down the unit in the event that water flow is interrupted in order to guard against evaporator freeze-up.

A solid state flow switch that is factorymounted and wired in the chiller leaving water nozzle is available as an option.

A flow switch for field mounting and wiring in the leaving chilled water is also available as an option from McQuay under

22 IMM AGS-2

Figure 17, Flow Switch

1 1/4" (32mm) pipe

dia. min. after switch

Flow direction marked on switch

1" (25mm) NPT flow

switch connection

Tee

1 1/4" (32mm) pipe

dia. min. before switch

ordering number 017503300. It is a paddle-type switch and adaptable to any pipe size from

Vent

Valve

Vibration

Valved

Against Freezing

Vibration

Valve

1" (25mm) to 8" (203mm) nominal.

Certain minimum flow rates are required to close the switch and are listed in Table 13. Installation should be as shown in Figure 18.

Electrical connections in the unit control center should be made at terminals 60 and 67 from switch terminals Y and R. The normally open contacts of the flow switch should be wired between these two terminals. Flow switch contact quality must be suitable for 24 VAC, low current (16ma). Flow switch wire must be in separate conduit from any high voltage conductors (115 VAC and higher) and have an insulation rating of 600 volts.

Table 13, Flow Switch Flow Rates

(NOTE !)

Min.

Adjst.

Max.

Adjst.

Flow

Flow Lpm 0.8 1.1 2.2 2.8 4.3 11.4 22.9 35.9 38.6

Flow

Flow Lpm 2.8 4.1 6.1 7.3 11.4 27.7 53.4 81.8 90.8

NOTES:

1. A segmented 3-inch paddle (1, 2, and 3 inches) is furnished mounted, plus a 6-inch paddle loose.

2. Flow rates for a 2-inch paddle trimmed to fit the pipe.

3. Flow rates for a 3-inch paddle trimmed to fit the pipe.

4. Flow rates for a 3-inch paddle.

5. Flow rates for a 6-inch paddle.

inch 1 1/4 1 1/2 2 2 1/2 3 4 5 6 8 Pipe Size

mm 32 (2) 38 (2) 51 63 (3) 76 102 (4) 127 (4) 153 (4) 204 (5)

gpm 5.8 7.5 13.7 18.0 27.5 65.0 125.0 190.0 205.0 Lpm 1.3 1.7 3.1 4.1 6.2 14.8 28.4 43.2 46.6 gpm 3.7 5.0 9.5 12.5 19.0 50.0 101.0 158.0 170.0

No

gpm 13.3 19.2 29.0 34.5 53.0 128.0 245.0 375.0 415.0 Lpm 3.0 4.4 6.6 7.8 12.0 29.1 55.6 85.2 94.3 gpm 12.5 18.0 27.0 32.0 50.0 122.0 235.0 360.0 400.0

No

Figure 18, Typical Field Water Piping

Suction

In

Gauge

Flow

Eliminator

Balancing

Pressure

Out

Liquid

Drain

Notes:

1. Connections for vent and drain fittings are located on the top and bottom of the evaporator.

2. Piping must be supported to avoid putting strain on the evaporator nozzles.

Eliminator

Switch

Water

Strainer

Gate

Flow

Gate

Protect All Field Piping

Flow

Refrigerant Charge

All packaged units are designed for use with R-134a and are shipped with a full operating charge. The operating charge for each unit is shown in the Physical Data Tables beginning on page 26 for packaged units, and page 60 for remote evaporator models. Model AGSCM/CB with remote evaporators are shipped with a full unit charge. Refrigerant must be added in the field for the evaporator and for the refrigerant lines.

Glycol Solutions

When using glycol anti-freeze solutions the chiller's capacity, glycol solution flow rate, and pressure drop through the evaporator can be calculated using the following formulas and tables.

IMM AGS-2 23

Note: The procedure below does not specify the type of glycol. Use the derate factors

()()(

)

found in Table 14 for corrections when using propylene glycol and those in Table 15 for ethylene glycol.

1. Capacity - Cooling capacity is reduced from that with plain water. To find the

reduced value, multiply the chiller’s water system tonnage by the capacity correction factor to find the chiller’s capacity when using glycol.

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

GPM−=

24

factorflowtons

TDelta

3. Pressure drop - To determine pressure drop through the evaporator when using

glycol, enter the water pressure drop curve at the water flow rate. Multiply the water pressure drop found there by the "PD" factor to obtain corrected glycol pressure drop.

4. Power - To determine glycol system kW, multiply the water system kW by the factor

designated "Power".

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

NOTE: Do not use automotive grade antifreeze. Industrial grade glycols must be used. Automotive antifreeze contains inhibitors that 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 14, Ethylene Glycol Factors

Freeze

%

E.G.

Point

oF o

26 -3.3 0.996 0.998 1.036 1.097

10

18 -7.8 0.988 0.994 1.061 1.219

20

7 -13.9 0.979 0.991 1.092 1.352

30

-7 -21.7 0.969 0.986 1.132 1.532

40

-28 -33.3 0.958 0.981 1.182 1.748

50

Capacity Power Flow PD

C

Table 15, Propylene Glycol Factors

Freeze

% P.G.

10

20

30

40

50

Point

oF o

26 -3.3 0.991 0.996 1.016 1.092

19 -7.2 0.981 0.991 1.032 1.195

9 -12.8 0.966 0.985 1.056 1.345

-5 -20.6 0.947 0.977 1.092 1.544

-27 -32.8 0.932 0.969 1.140 1.906

Capacity Power Flow PD

C

Water Flow and Pressure Drop

Adjust the chilled water flow through the evaporator to meet specified conditions. The flow rates must fall between the minimum and maximum values shown in the table on the following page. Flow rates below the minimum values shown will result in laminar flow that will reduce efficiency, cause erratic operation of the electronic expansion valve and could cause low temperature cutouts. On the other hand, flow rates exceeding the maximum values shown can cause erosion on the evaporator water connections and tubes.

Measure the chilled water pressure drop through the evaporator at field-installed pressure taps. It is important not to include valve or strainer pressure drops in these readings.

24 IMM AGS-2

Figure 19, Evaporator Pressure Drops

200

300

400

500

600

700

800

900

1000

Flow Rate (GPM)

P

r

e

s

u

r

e

D

r

o

p

(

f

t

o

f

w

a

t

e

r

)

Flow Rate (L/s)

P

r

e

s

u

r

e

D

r

o

p

(

k

P

a

)

AGS Models

120, 130, 140

125, 135, 160

AGS Models

6 13 19 25 32 38 44 50 57 63

70

60

50

40

30

20

10

AGS Models

145

9

8

7

AGS Models

190, 195, 210

210

180

150

120

90

60

30 27

24

21

6

5

165, 170, 175, 180

4

100

Minimum/Nominal/Maximum Flow Rates

AGS

MODEL

120

125

130

135

140

145

160

165

170

175

180

190

195

210

MINIMUM FLOW NOMINAL FLOW MAXIMUM FLOW

gpm l/s ft kpa gpm l/s ft kpa gpm l/s ft kpa

175 11.1 4.6 13.7 280 17.7 10.6 31.6 467 29.5 26.5 79.1

182 11.5 4.9 14.6 292 18.5 11.8 35.2 486 30.8 29.2 87.2

188 11.9 5.3 15.8 300 19.0 12.9 38.5 501 31.7 30.4 90.7

196 12.4 5.6 16.7 314 19.9 13.5 40.3 524 33.1 33.5 100.0

201 12.7 5.9 17.6 321 20.3 13.6 40.6 535 33.8 30.4 90.7

215 13.6 6.9 20.6 343 21.7 16.1 48.0 572 36.2 40.2 119.9

227 14.4 7.2 21.5 363 23.0 17.1 51.0 606 38.3 43.0 128.4

241 15.2 4.8 14.4 385 24.4 11.3 33.8 642 40.6 28.6 85.3

252 16.0 5.2 15.7 403 25.5 12.3 36.7 672 42.6 31.1 92.7

259 16.4 5.7 17.0 414 26.2 12.9 38.5 690 43.7 32.6 97.2

269 17.1 5.9 17.7 431 27.3 13.9 41.4 718 45.5 35.0 104.5

278 17.6 5.2 15.5 445 28.2 12.3 36.7 742 47.0 30.7 91.6

285 18.1 5.4 16.1 457 28.9 12.8 38.2 761 48.2 32.6 97.3

302 19.1 5.9 17.6 483 30.6 14.3 42.7 805 50.9 34.5 103.0

18

15

12

IMM AGS-2 25

Physical Data, Standard Efficiency

Table 16, Physical Data, AGS 120C – AGS 140C

DATA

BASIC DATA

Unit Cap. @ 44°F LWT, 95°F Ambient Temperature kW, (tons)

Unit Operating Charge lbs (kg) 131 (59) 131 (59) 131 (59) 131 (59) 131 (59) 131 (59) Cabinet Dimensions

L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) 9452 (4291) 9452 (4291) 9452 (4291) Unit Shipping Weight, lbs (kg) 9020 (4095) 9020 (4095) 9020 (4095) Economizer No No No

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 60 (211) 60 (211) 60 (211) 70 (246) 70 (246) 70 (246)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 358 (163) 358 (163) 358 (163) 358 (163) 358 (163) 358 (163)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans – 30 in. Fan Dia. 8 8 8 No. of Motors -- hp (kW) 8 2 (1.5) 8 2 (1.5) 8 2 (1.5) Fan & Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, fpm (m/s) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, cfm (l/s) 86900 (41020) 86900 (41020) 86900 (41020)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length in.(mm) - in. (mm)

Evaporator R-134a Charge lbs (kg) 1.95 (0.9) 1.95 (0.9) 1.95 (0.9) 1.95 (0.9) 1.95 (0.9) 1.95 (0.9) Water Volume, gallons (liters) 49 (185) 49 (185) 49 (185) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427) 352 (2427)

120C 130C 140C

Ckt 1 Ckt 2 Ckt 1 Ckt 2 Ckt 1 Ckt 2

116.7 (410) 125.2 (440) 133.7 (470)

187 x 89 x 101

4750 x 2261 x 2565

15.5 x 82.4

(394 x 2093)

AGS MODEL NUMBER

187 x 89 x 101

4750 x 2261 x 2565

15.5 x 82.4

(394 x 2093)

187 x 89 x 101

4750 x 2261 x 2565

15.5 x 82.4

(394 x 2093)

Table 17, Physical Data, AGS 160C – AGS 180C

AGS MODEL NUMBER

DATA 160C 170C 180C

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

BASIC DATA

Unit Cap. @ 44°F LWT, 95°F Ambient Temperature kW, (tons) Unit Operating Charge, lbs (kg) 131 (59) 131 (59) 159 (72) 159 (72) 171 (78) 171 (78)

Cabinet Dim., L x W x H, in. (mm)

Unit Operating Weight, lbs. (kg) 10209 (4635) 11277 (5120) 11277 (5120) Unit Shipping Weight, lbs (kg) 9484 (4306) 10552 (4791) 10552 (4791) Economizer No No Yes

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 70 (246) 85 (299) 85 (299) 85 (299) 95 (334) 95 (334)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 358 (163) 358 (163) 399 (181) 399 (181) 399 (181) 399 (181)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans; 30 in. Fan Dia., 8 10 10 No. of Motors – hp (kW) 8 2 (1.5) 10 2 (1.5) 10 2 (1.5) Fan & Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, fpm 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, cfm (l/s) 86900 (41020) 108630 (51280) 108630 (51280)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.,Tube Length in.(mm)

Evaporator R-134a Charge lbs (kg) 2.53 (1.1) 2.53 (1.1) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) Water Volume, gallons (liters) 83 (314) 106 (401) 106 (401) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427) 352 (2427)

151.4 (532) 168.1 (591) 179.6 (631)

187 x 89 x 101

4750 x 2261 x 2565

19.4 x 82.4

(493 x 2093)

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 105.1

(493 x 2670)

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 105.1 (493 x 2670)

26 IMM AGS-2

Table 18, Physical Data, AGS 190C – AGS 210C

DATA

BASIC DATA

Unit Cap. @ 44°F LWT, 95°F Ambient Temperature kW, (tons)

Unit Operating Charge lbs (kg) 172 (78) 172 (78) 201 (91) 201 (91) Cabinet Dimensions

L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) 11277 (5120) 11928 (5415) Unit Shipping Weight, lbs (kg) 10552 (4791) 11011 (4999) Economizer Yes Yes

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 95 (334) 95 (334) 95 (334) 95 (334)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 399 (181) 399 (181) 438 (199) 438 (199)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans -- 30 in. Fan Dia., 10 12 No. of Motors -- hp (kW) 10 2 (1.5) 12 2.5 (1.9) Fan & Motor RPM, 60Hz 1140 1140 60 Hz Fan Tip Speed, fpm (m/s) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, cfm (l/s) 108630 (51280) 130360 (61530)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length in.(mm) - in. (mm)

Evaporator R-134a Charge lbs (kg) 3.63 (1.6) 3.63 (1.6) 3.63 (1.6) 3.63 (1.6) Water Volume, gallons (liters) 106 (401) 104 (392) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427)

AGS 190C AGS 210C

Ckt 1 Ckt 2 Ckt 1 Ckt 2

185.6 (653) 201.2 (707)

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 105.1 (493 x 2670)

263 x 89 x 101

6680 x 2261 x 2565

19.4 x 105.1 (493 x 2670)

Physical Data, High Efficiency

Table 19, Physical Data, AGS 125C – AGS 145C

DATA

BASIC DATA

Unit Cap. @ 44°F LWT, 95°F Ambient Temperature kW, (tons)

Unit Operating Charge lbs (kg) 159 (72) 159 (72) 159 (72) 159 (72) 159 (72) 159 (72) Cabinet Dimensions

L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) 10930 (4962) 10930 (4962) 10485 (4760) Unit Shipping Weight, lbs (kg) 10205 (4633) 10205 (4633) 9942 (4514) Economizer No No No

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 60 (211) 60 (211) 60 (211) 70 (246) 70 (246) 70 (246)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 399 (181) 399 (181) 399 (181) 399 (181) 399 (181) 399 (181)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans – 30 in. Fan Dia., 10, 30 (762) 10, 30 (762) 10, 30 (762) No. of Motors -- hp (kW) 10 2 (1.5) 10 2 (1.5) 10 2 (1.5) Fan & Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, fpm (m/s) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, cfm (l/s) 108630 (51280) 108630 (51280) 108630 (51280)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length in.(mm) - in. (mm)

Evaporator R-134a Charge lbs (kg) 2.53 (1.1) 2.53 (1.1) 2.53 (1.1) 2.53 (1.1) 2.44 (1.1) 2.44 (1.1) Water Volume, gallons (liters) 83 (314) 83 (314) 62 (236) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427) 352 (2427)

125C 135C 145C

Ckt 1 Ckt 2 Ckt 1 Ckt 2 Ckt 1 Ckt 2

121.6 (428) 130.9 (460) 143.0 (503)

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 82.4

(493 x 2093)

AGS MODEL NUMBER

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 82.4

(493 x 2093)

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 105.1

(493 x 2670)

IMM AGS-2 27

Table 20, Physical Data, AGS 165C – AGS 195C

DATA

BASIC DATA

Unit Cap. @ 44°F LWT, 95°F Ambient Temperature kW, (tons)

Unit Operating Charge lbs (kg) 186 (84) 186 (84) 186 (84) 186 (84) 201 (91) 201 (91) Cabinet Dimensions

L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) 11928 (5415) 11277 (5120) 11277 (5120) Unit Shipping Weight, lbs (kg) 11011 (4999) 11011 (4999) 11011 (4999) Economizer N0 N0 Yes

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 70 (246) 85 (299) 85 (299) 85 (299) 95 (334) 95 (334)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 438 (199) 438 (199) 438 (199) 438 (199) 438 (199) 438 (199)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans – 30 in. Fan Dia. 12 12 12 No. of Motors -- hp (kW) 12 2 (1.5) 12 2 (1.5) 12 2 (1.5) Fan & Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, fpm (m/s) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, cfm (l/s) 130360 (61530) 130360 (61530) 130360 (61530)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length in.(mm) - in. (mm)

Evaporator R-134a Charge lbs (kg) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) Water Volume, gallons (liters) 106 (401) 106 (401) 106 (401) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427) 352 (2427)

165C 175C 195C

Ckt 1 Ckt 2 Ckt 1 Ckt 2 Ckt 1 Ckt 2

160.5 (564) 172.5 (607) 190.3 (669)

263 x 89 x 101

6680 x 2261 x 2565

19.4 x 105.1 (493 x 2670)

AGS MODEL NUMBER

263 x 89 x 101

6680 x 2261 x 2565

19.4 x 105.1

(493 x 2670)

263 x 89 x 101

6680 x 2261 x 2565

19.4 x 105.1 (493 x 2670)

28 IMM AGS-2

Dimensional Data

" A "

" B "

18.4

(467.4)

" C " VICTAULIC CONNECTION

" D "

INLET

Figure 20, Dimensions, AGS 120CS/H – AGS 160CS/H

Note: See p age 13 for lift ing locations , mount ing locations , weig ht s and m ounting loads.

6.0 (152.4)

8.5 (215.9)

0.875 (22.2)

KNOCK-OUT

( QTY 4 TOTAL)

100.4

(2550.2)

CONTROL

PANEL

FIELD CONTROL

CONNECTION

POWER

PANEL

88.5 (2247.9)

POWER

PANEL

POWER ENTRY

8.0 (203.2)

7.2 (182.9)

31.5

(800.1)

OUTLET

3307127-00-01

186.6 (4739.6)

UNIT SIZE

AGS120C

AGS130C

AGS140C

AGS160C

" A " " B " " C " " D "

15.2 (386.1) 72.3 (1836.4) 6 (152.4) 32.1 (815.3)

16.2 (411.5) 70.3 (1785.6) 8 (203.2) 30.1 (764.5)

Dimensions In (mm)

IMM AGS-2 29

Figure 21, Dimensions, AGS 125CS/H –190CS/H

" A "

" B "

(467.4)

"C " VICTAULIC CONNECTION

" D "

INLET

Note: See page13 f or lifting lo cations, mounting lo cations, weights and mountin g loads.

6.0 (152.4)

8.5 (215.9)

0.875 (22.2)

KNOCK OUT

( QTY 4 TOTAL)

100.4

(2550.2)

CONTROL

PANEL

CONNECTION

330712701-00-02

POWER

PANEL

88.5 (2248.9)

POWER

POWER ENTRYFIELD CONTROL

PANEL

8.0 (203.2)

7.2 (182.9)

31.5

(800.1)

18.4

OUTLET

224.8 (5709.9)

UNIT

SIZE

AGS125C

AGS135C

AGS145C

AGS170C

AGS180C

AGS190C

Dimensions In (mm)

" A " " B " " C " " D "

39.3 (998.2) 70.3 (1785.6) 8 (203.2) 30.1 (764.5)

15.6 (396.2) 94.9 (2410.5) 6 (152.4) 32.1 (815.3)

16.7 (424.2) 92.9 (2359.7) 8 (203.2) 30.1 (764.5)

30 IMM AGS-2

Figure 22 , Dimensions, AGS 165CS/H –210CS/H

" A "

" B "

" C " VICTAULIC CONNECTION

" D "

INLET

Note: See page 13 for lifti ng locations, mounting l ocations, weights and mo unting loads.

6.0 (152.4)

8.5 (215.9)

0.875 (22.2)

KNOCK OUT

( QTY 4 TOTAL)

100.4

(2550.2)

FIELD CONTROL CONNECTION

3307127-00-03

POWER

PANEL

88.5 (2247.9)

POWER

PANEL

POWER ENTRY

8.0 (203.2)

7.2 (182.9)

31.5

(800.1)

18.4 (467.4)

OUTLET

263.0 (6680.2)

UNIT SIZE

AGS165C

AGS175C

AGS195C

AGS210C

Dimensions In (mm)

" A " " B " " C " " D "

54.9 (1394.5) 92.9 (2359.7) 8 (203.2) 30.1 (764.5)

IMM AGS-2 31

Electrical Data

Field Wiring

General

Wiring must comply with all applicable codes and ordinances. Warranty does not cover damage to the equipment caused by wiring not complying with specifications.

An open fuse indicates a short, ground, or overload. Before replacing a fuse or restarting a compressor or fan motor, the trouble must be found and corrected.

Copper wire is required for all power lead terminations at the unit, and copper must be used for all other wiring to the unit.

AGS units can be ordered with main power wiring for either multiple-point power (standard) or single-point connection (optional).

If the standard multiple-point power wiring is ordered, two separate power connections are made to power blocks (or optional circuit breaker disconnects) in power panel. See the dimension drawings beginning on page 29 for entry locations. Separate disconnects are required for each electrical circuit if the McQuay optional factory-mounted disconnects are not ordered.

If the optional single-point power connection is ordered, a single power connection is made to a power block (or optional circuit breaker disconnect) in the unit power panel. A separate disconnect is required if the McQuay optional factory-mounted disconnect is not ordered. Isolation circuit breakers for each circuit are included.

It can be desirable to have the unit evaporator heaters on a separate disconnect switch from the main unit power supply so that the unit power can be shut down without defeating the freeze protection provided by the evaporator heaters. See the field wiring diagram on page 42 for connection details.

The 115-volt control transformer is factory mounted and wired.

CAUTION

If a separate disconnect is used for the 115V supply to the unit, it must power the entire control circuit, not just the evaporator heaters. It must be clearly marked so that it is not accidentally shut off during cold seasons. Freeze damage to the evaporator could result. If the evaporator is drained for winter freeze protection, the heaters must be de-energized to prevent heater burnout.

CAUTION

AGS unit compressors are single-direction rotation compressors and can be damaged if rotated in the wrong direction. For this reason, proper phasing of electrical power is important. Electrical phasing must be A, B, C for electrical phases 1, 2 and 3 (A=L1, B=L2, C=L3) for single or multiple point wiring arrangements. The solid-state starters contain phase reversal protection. DO NOT ALTER THE WIRING TO THE STARTERS.

32 IMM AGS-2

Table 21, AGS 120C – AGS 210C, Electrical Data, Single-Point

AGS UNIT SIZE

120C 380 60 320 400 MCM 400 400

125C 380 60 328 400 MCM 400 450

130C 380 60 342 400 MCM 400 450

135C 380 60 350 400 MCM 400 450

140C 380 60 359 2-250 MCM 400 500

145C 380 60 367 2-250 MCM 450 500

160C 380 60 400 2-250 MCM 450 500

165C 380 60 416 2-300 MCM 500 500

170C 380 60 441 2-300 MCM 500 600

175C 380 60 449 2-300 MCM 500 600

VOLTS HZ

208 581 (2) 350 MCM 700 800 230 526 (2) 300 MCM 600 700

460 279 300 MCM 350 350 575 211 4/0 AWG 250 250 208 595 (2) 350 MCM 700 800 230 539 (2) 300 MCM 600 700

460 285 300 MCM 350 350 575 216 4/0 AWG 250 300 208 625 (2) 300 MCM 700 800 230 563 (2) 300 MCM 700 800

460 291 350 MCM 350 400 575 222 4/0 AWG 250 300 208 639 (2) 400 MCM 800 800 230 576 (2) 350 MCM 700 800

460 298 350 MCM 350 400 575 227 4/0 AWG 250 300 208 660 (2) 400 MCM 800 800 230 593 (2) 350 MCM 700 800

460 301 350 MCM 350 400 575 231 250 MCM 300 300 208* 674 (2) 400 MCM 800 800 230 606 (2) 350 MCM 700 800

460 308 350 MCM 350 400 575 236 250 MCM 300 300 208* 716 (2) 2-250 MCM 800 1000 230 646 (2) 400 MCM 800 800

460 325 400 MCM 400 450 575 255 250 MCM 300 350 208* 745 (2) 2-250 MCM 1000 1000 230 672 (2) 400 MCM 800 800

460 338 400 MCM 400 450 575 265 300 MCM 300 350 208* 775 (2) 2-250 MCM 1000 1000 230 701 (2) 400 MCM 800 800

460 351 400 MCM 400 450 575 279 300 MCM 350 350 208* 790 (2) 2-250 MCM 1000 1000 230 714 (2) 2-250 MCM 800 800

460 357 2-250 MCM 400 450 575 284 300 MCM 350 350

MINIMUM

CIRCUIT

AMPACITY

(MCA)

POWER SUPPLY

(NOTE 1)

FIELD WIRE

Continued on next page.

FIELD FUSE SIZE or

HACR BREAKER SIZE

RECOM-

MENDED

MAXIMUM

IMM AGS-2 33

AGS UNIT SIZE

180C 380 60 469 (2)-250 MCM 600 600

190C 380 60 469 (2)-250 MCM 600 600

195C 380 60 479 (2)-250 MCM 600 600

210C 380 60 493 (2)-250 MCM 600 600

Notes

1. See Note 1 on page 47 for explanation of wiring nomenclature.

2. Table based on 75°C field wire.

3. A “HACR” breaker is a circuit breaker designed for use on equipment with multiple motors.

4. Complete notes are on page 47.

VOLTS HZ

208* 853 (2) 2-300 MCM 1000 1000

230 772 (2) 2-250 MCM 1000 1000

460 380 2-250 MCM 450 500 575 301 350 MCM 350 400

208* 853 (2) 2-300 MCM 1000 1000

230 772 (2) 2-250 MCM 1000 1000

460 380 2-250 MCM 450 500 575 301 350 MCM 350 400 208* 871 (2) 2-300 MCM 1000 1000 230 788 (2) 2-250 MCM 1000 1000

460 387 2-250 MCM 450 500 575 306 350 MCM 350 400 208* 897 (2) 2-300 MCM 1000 1200 230 812 (2) 2-250 MCM 1000 1000

460 396 2-250 MCM 450 500 575 313 400 MCM 350 400

It stands for Heating, Air Conditioning, Refrigeration.

MINIMUM

CIRCUIT

AMPACITY

(MCA)

POWER

SUPPLY

(NOTE 1)

FIELD WIRE

FIELD FUSE SIZE or

HACR BREAKER SIZE

RECOM-

MENDED

MAXIMUM

Table 22, AGS 120C – AGS 210C, Electrical Data, Multiple-Point

ELECTRICAL CIRCUIT 1 (COMP 1) ELECTRICAL CIRCUIT 2 (COMP 2)

AGS

UNIT

VOLTS HZ

SIZE

208 320 400 MCM 400 500 320 400 MCM 400 500 230 289 350 MCM 350 450 289 350 MCM 350 450

120 380 60 176 3/0 AWG 225 300 176 3/0 AWG 225 300

460 154 2/0 AWG 200 250 154 2/0 AWG 200 250 575 116 1 AWG 150 200 116 1 AWG 150 200 208 327 400 MCM 400 500 327 400 MCM 400 500 230 296 350 MCM 350 450 296 350 MCM 350 450

125 380 60 180 3/0 AWG 225 300 180 3/0 AWG 225 300

460 157 2/0 AWG 200 250 157 2/0 AWG 200 250 575 119 1 AWG 150 200 119 1 AWG 150 200 208 320 400 MCM 400 500 363 2-250 MCM 450 600 230 289 350 MCM 350 450 327 400 MCM 400 500

130 380 60 176 3/0 AWG 225 300 198 3/0 AWG 250 300

460 154 2/0 AWG 200 250 166 2/0 AWG 200 250 575 116 1 AWG 150 200 128 1 AWG 175 200 208 327 400 MCM 400 500 371 2-250 MCM 450 600 230 296 350 MCM 350 450 333 400 MCM 400 500

135 380 60 180 3/0 AWG 225 300 202 4/0 AWG 250 300

460 157 2/0 AWG 200 250 169 2/0 AWG 200 250 575 119 1 AWG 150 200 130 1 AWG 175 200 208 363 2-250 MCM 450 600 363 2-250 MCM 450 600 230 327 400 MCM 400 500 327 400 MCM 400 500

140 380 60 198 3/0 AWG 250 300 198 3/0 AWG 250 300

460 166 2/0 AWG 200 250 166 2/0 AWG 200 250 575 128 1 AWG 175 200 128 1 AWG 175 200

MINIMUM

CIRCUIT

AMPS (MCA)

POWER

SUPPLY

FIELD WIRE

FIELD FUSING

REC

FUSE

SIZE

MAX

FUSE

SIZE

MINIMUM

CIRCUIT

AMPS (MCA)

Continued on next page.

POWER

SUPPLY

FIELD WIRE

FIELD FUSING

REC

FUSE

SIZE

MAX

FUSE

SIZE

34 IMM AGS-2

ELECTRICAL CIRCUIT 1 (COMP 1) ELECTRICAL CIRCUIT 2 (COMP 2)

AGS

UNIT

VOLTS HZ

SIZE

208 371 2-250 MCM 450 600 371 2-250 MCM 450 600 230 333 400 MCM 400 500 333 400 MCM 400 500

145 380 60 202 4/0 AWG 250 300 202 4/0 AWG 250 300

460 169 2/0 AWG 200 250 169 2/0 AWG 200 250 575 130 1 AWG 175 200 130 1 AWG 175 200 208 363 2-250 MCM 450 600 420 2-300 MCM 500 700 230 327 400 MCM 400 500 379 2-250 MCM 450 600

160 380 60 198 3/0 AWG 250 300 239 250 MCM 300 400

460 166 2/0 AWG 200 250 190 3/0 AWG 250 300 575 128 1 AWG 175 200 151 2/0 AWG 200 250 208 378 2-250 MCM 450 600 434 2-300 MCM 450 600 230 340 400 MCM 400 500 393 2-250 MCM 400 500

165 380 60 206 4/0 AWG 250 350 247 250 MCM 250 350

460 173 2/0 AWG 225 250 197 3/0 AWG 225 250 575 132 1/0 AWG 175 225 156 2/0 AWG 175 225 208 427 2-300 MCM 600 700 427 2-300 MCM 600 700 230 386 2-250 MCM 500 600 386 2-250 MCM 500 600

170 380 60 243 250 MCM 300 400 243 250 MCM 300 400

460 193 3/0 AWG 250 300 193 3/0 AWG 250 300 575 154 2/0 AWG 200 250 154 2/0 AWG 200 250 208 434 2-300 MCM 600 700 434 2-300 MCM 600 700 230 393 2-250 MCM 500 600 393 2-250 MCM 500 600

175 380 60 247 250 MCM 300 400 247 250 MCM 300 400

460 197 3/0 AWG 250 300 197 3/0 AWG 250 300 575 156 2/0 AWG 200 250 156 2/0 AWG 200 250 208 469 (2) 250 MCM 600 800 469 (2) 250 MCM 600 800 230 425 2-300 MCM 500 700 425 2-300 MCM 500 700

180 380 60 258 300 MCM 350 400 258 300 MCM 350 400

460 209 4/0 AWG 250 350 209 4/0 AWG 250 350 575 166 2/0 AWG 200 250 166 2/0 AWG 200 250 208 469 (2) 250 MCM 600 800 469 (2) 250 MCM 600 800 230 425 2-300 MCM 500 700 425 2-300 MCM 500 700

190 380 60 258 300 MCM 350 400 258 300 MCM 350 400

460 209 4/0 AWG 250 350 209 4/0 AWG 250 350 575 166 2/0 AWG 200 250 166 2/0 AWG 200 250 208 478 (2) 250 MCM 600 800 478 (2) 250 MCM 600 800 230 433 2-300 MCM 600 700 433 2-300 MCM 600 700

195 380 60 263 300 MCM 350 400 263 300 MCM 350 400

460 213 4/0 AWG 300 350 213 4/0 AWG 300 350 575 169 2/0 AWG 200 250 169 2/0 AWG 200 250

208 491 (2) 250 MCM 600 800 491 (2) 250 MCM 600 800 230 445 2-300 MCM 600 700 445 2-300 MCM 600 700

210 380 60 270 300 MCM 350 450 270 300 MCM 350 450

460 218 4/0 AWG 300 350 218 4/0 AWG 300 350 575 172 2/0 AWG 225 250 172 2/0 AWG 225 250

MINIMUM

CIRCUIT

AMPS (MCA)

POWER

SUPPLY

FIELD WIRE

FIELD FUSING

REC

FUSE

SIZE

MAX

FUSE

SIZE

MINIMUM

CIRCUIT

AMPS (MCA)

POWER

SUPPLY

FIELD WIRE

FIELD FUSING

REC

FUSE

SIZE

MAX

FUSE

SIZE

IMM AGS-2 35

Table 23, AGS 120C – AGS 210C, Compressor and Condenser Fan Motor Amp Draw

AGS UNIT

VOLTS HZ

SIZE

208 232 232 7.3 8 40.0 230 210 210 6.6 8 40.0

120 380 60 128 128 4.0 8 20.0

460 112 112 3.3 8 20.0 575 85 85 2.4 8 12.8 208 232 232 7.3 10 40.0 230 210 210 6.6 10 40.0

125 380 60 128 128 4.0 10 20.0

460 112 112 3.3 10 20.0 575 85 85 2.4 10 12.8 208 232 267 7.3 8 40.0 230 210 240 6.6 8 40.0

130 380 60 128 145 4.0 8 20.0

460 112 122 3.3 8 20.0 575 85 94 2.4 8 12.8 208 232 267 7.3 10 40.0 230 210 240 6.6 10 40.0

135 380 60 128 145 4.0 10 20.0

460 112 122 3.3 10 20.0 575 85 94 2.4 10 12.8 208 267 267 7.3 8 40.0 230 240 240 6.6 8 40.0

140 380 60 145 145 4.0 8 20.0

460 122 122 3.3 8 20.0 575 94 94 2.4 8 12.8 208 267 267 7.3 10 40.0 230 240 240 6.6 10 40.0

145 380 60 145 145 4.0 10 20.0

460 122 122 3.3 10 20.0 575 94 94 2.4 10 12.8 208 267 312 7.3 8 40.0 230 240 282 6.6 8 40.0

160 380 60 145 178 4.0 8 20.0

460 122 141 3.3 8 20.0 575 94 113 2.4 8 12.8 208 267 312 7.3 12 40.0 230 240 282 6.6 12 40.0

165 380 60 145 178 4.0 12 20.0

460 122 141 3.3 12 20.0 575 94 113 2.4 12 12.8 208 312 312 7.3 10 40.0 230 282 282 6.6 10 40.0

170 380 60 178 178 4.0 10 20.0

460 141 141 3.3 10 20.0 575 113 113 2.4 10 12.8 208 312 312 7.3 12 40.0 230 282 282 6.6 12 40.0

175 380 60 178 178 4.0 12 20.0

460 141 141 3.3 12 20.0 575 113 113 2.4 12 12.8 208 340 340 7.3 10 40.0 230 308 308 6.6 10 40.0

180 380 60 187 187 4.0 10 20.0

460 154 154 3.3 10 20.0 575 123 123 2.4 10 12.8

RATED LOAD AMPS

CIRCUIT #1 CIRCUIT #2

FAN

MOTORS

FLA

(EACH)

NO OF

FAN

MOTORS

Continued on next page.

L R A

FAN

MOTORS

(EACH)

36 IMM AGS-2

AGS

UNIT

VOLTS HZ

SIZE

208 340 340 7.3 10 40.0 230 308 308 6.6 10 40.0

190 380 60 187 187 4.0 10 20.0

460 154 154 3.3 10 20.0 575 123 123 2.4 10 12.8 208 340 340 7.3 12 40.0 230 308 308 6.6 12 40.0

195 380 60 187 187 4.0 12 20.0

460 154 154 3.3 12 20.0 575 123 123 2.4 12 12.8 208 340 340 11.0 12 46.0 230 308 308 9.9 12 46.0

210 380 60 187 187 6.0 12 25.0

460 154 154 4.1 12 23.0 575 123 123 3.0 12 20.0

NOTES:

1. Table based on 75°C field wire.

2. Complete notes are on page on page 47.

RATED LOAD AMPS

CIRCUIT #1 CIRCUIT #2

FAN

MOTORS

FLA

(EACH)

NO OF

FAN

MOTORS

L R A

FAN

MOTORS

(EACH)

Table 24, AGS 120C – AGS 210C, Customer Wiring Information With Single-Point Power

AGS

UNIT

VOLTS HZ

SIZE

208 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C)

120 380 60 400 #6 – 350 MCM (2/c) 400 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/c) 400 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/c) 250 #6 – 350 MCM (1/C) 208 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C)

125 380 60 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 250 #6 – 350 MCM (1/C) 208 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C)

130 380 60 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 250 #6 – 350 MCM (1/C) 208 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C)

135 380 60 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 250 #6 – 350 MCM (1/C) 208 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C)

140 380 60 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 250 #6 – 350 MCM (1/C) 208 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C)

145 380 60 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 250 #6 – 350 MCM (1/C)

WIRING TO STANDARD UNIT POWER BLOCK

TERMINAL SIZE

AMPS

CONNECTOR WIRE RANGE

PER PHASE

(COPPER WIRE ONLY)

Continued on next page

WIRING TO OPTIONAL NONFUSED

MOLDED CASE SWITCH IN UNIT

SIZE

CONNECTOR WIRE RANGE

PER PHASE

(COPPER WIRE ONLY)

IMM AGS-2 37

AGS UNIT SIZE

NOTE:

1. Terminal size amps are the maximum amps that the power block is rated for.

2. Complete notes are on page 47.

3. Data based on 75°C wire.

4. (2/C) notation means two cables per conduit.

VOLTS HZ

208 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C)

160 380 60 800 1/0 – 750 MCM (4/C) 600 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C) 208 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 500 MCM (3/C)

165 380 60 800 1/0 – 750 MCM (4/C) 600 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C) 208 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 800 MCM (2/C)

170 380 60 800 1/0 – 750 MCM (4/C) 600 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 208 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C) 230 800 1/0 – 750 MCM (4/C) 800 1/0 – 800 MCM (2/C)

175 380 60 800 1/0 – 750 MCM (4/C) 600 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 208 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C) 230 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C)

180 380 60 800 1/0 – 750 MCM (4/C) 600 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 208 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C) 230 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C)

190 380 60 800 1/0 – 750 MCM (4/C) 600 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 208 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C) 230 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C)

195 380 60 800 1/0 – 750 MCM (4/C) 600 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C0 575 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C) 208 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C) 230 1000 1/0 – 750 MCM (4/C) 1200 250 – 500 MCM (4/C)

210 380 60 800 1/0 – 750 MCM (4/C) 600 3/0 – 500 MCM (2/C)

460 400 #6 – 350 MCM (2/C) 600 3/0 – 500 MCM (2/C) 575 400 #6 – 350 MCM (2/C) 400 3/0 – 500 MCM (2/C)

WIRING TO STANDARD UNIT POWER BLOCK

TERMINAL SIZE

AMPS

CONNECTOR WIRE RANGE

PER PHASE

(COPPER WIRE ONLY)

WIRING TO OPTIONAL NONFUSED

MOLDED CASE SWITCH IN UNIT

SIZE

AMPS

CONNECTOR WIRE RANGE

PER PHASE

(COPPER WIRE ONLY)

38 IMM AGS-2

Table 25, AGS 120C – 210C, Wiring Information with Multiple-Point Power w/o Disconnect

AGS

UNIT

VOLTS HZ

SIZE

208 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

120 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

208 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

125 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

130 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

208 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

135 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

140 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

145 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 400 800 #6 – 350 MCM (2/C) 1/0 – 750 MCM (4/C) 230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

160 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 400 800 #6 – 350 MCM (2/C) 1/0 – 750 MCM (4/C) 230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

165 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C) 230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

170 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C) 230 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

175 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C) 230 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C)

180 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

TERMINAL SIZE (AMPS) CONNECTOR WIRE RANGE PER PHASE (COPPER WIRE ONLY)

CKT 1 CKT 2 CKT 1 CKT 2

Continued on next page

WIRING TO UNIT POWER BLOCK

IMM AGS-2 39

AGS UNIT SIZE

NOTES:

1. Terminal size amps are the maximum amps that the power block is rated for.

2. See Table 26 for multiple point with Disconnect Switch connections.

3. Data based on 75°C wire.

4. (2/C) notation means two cables per conduit.

5. Complete notes are on page 47.

VOLTS HZ

208 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C) 230 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C)

190 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C) 230 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C)

195 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 208 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C) 230 800 800 1/0 – 750 MCM (4/C) 1/0 – 750 MCM (4/C)

210 380 60 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

460 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C) 575 400 400 #6 – 350 MCM (2/C) #6 – 350 MCM (2/C)

TERMINAL SIZE (AMPS) CONNECTOR WIRE RANGE PER PHASE (COPPER WIRE ONLY)

CKT 1 CKT 2 CKT 1 CKT 2

WIRING TO UNIT POWER BLOCK

Table 26, AGS 120C –210C, Wiring Data with Multiple-Point Power w/ Disconnect Switch

AGS UNIT SIZE

VOLTS HZ

208 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

120 380 60 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 150 150 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

125 380 60 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 150 150 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

130 380 60 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 150 150 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

135 380 60 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 150 150 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

140 380 60 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 150 150 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

145 380 60 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 150 150 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C)

TERMINAL SIZE (AMPS) CONNECTOR WIRE RANGE PER PHASE (COPPER WIRE ONLY)

CKT 1 CKT 2 CKT 1 CKT 2

Continued on next page

WIRING TO UNIT DISCONNECT SWITCH (MOLDED CASE SWITCH)

40 IMM AGS-2

AGS UNIT SIZE

NOTE:

1. Terminal size amps are the maximum amps that the disconnect switch is rated for.

2. Data based on 75°C wire.

3. (2/C) notation means two cables per conduit.

4. Complete notes are on page 47.

VOLTS HZ

208 400 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 400 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

160 380 60 250 400 #6 – 350 MCM (1/C) 3/0 – 500 MCM (2/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 150 150 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 400 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 400 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

165 380 60 250 400 #6 – 350 MCM (1/C) 3/0 – 500 MCM (2/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 150 150 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

170 380 60 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

175 380 60 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C)

208 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

180 380 60 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

190 380 60 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

195 380 60 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 208 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C) 230 600 600 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

210 380 60 400 400 3/0 – 500 MCM (2/C) 3/0 – 500 MCM (2/C)

460 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C) 575 250 250 #6 – 350 MCM (1/C) #6 – 350 MCM (1/C)

TERMINAL SIZE (AMPS) CONNECTOR WIRE RANGE PER PHASE (COPPER WIRE ONLY)

CKT 1 CKT 2 CKT 1 CKT 2

WIRING TO UNIT DISCONNECT SWITCH

IMM AGS-2 41

Field Wiring Diagram

TB1

72

IF REMOTE STOP CONTROL

IS USED, REMOVE LEAD 897

897

60

66

AUTO

ON

MANUAL

60

68

AUTO

ON

MANUAL

71

4-20MA FOR

GND

60

67

70

TIME

DISCONNECT

UNIT MAIN

120 VAC

1

2

120 VAC

81

75

FU4

FU5

FU7

85

2

120 VAC

24 VAC

ALARM BELL OPTION

BELL

COM

2

REMOTE EVAPORATOR ONLY

TB*1

93

2

120 VAC

SV

LIQUID LINE

EXV

JUNCTION

BLACK

WHITE

GREEN

EV

NOTE:

*TB11 = CIRCUIT #1

*TB21 = CIRCUIT #2

EXV 1 (TOP) - CIRCUIT #1

EXV 2 (BOTTOM) - CIRCUIT #2

Figure 23, Typical Field Wiring Diagram

3 PHASE

POWER

SUPPLY

(BY OTHERS)

TERMINAL BLOCK

FUSED CONTROL

CIRCUIT TRANSFORMER

GND LUG

TO COMPRESSOR(S)

AND FAN MOTORS

120 VAC

N

DISCONNECT FU7 IF SUPPLYING SEPARATE 120V SOURCE.

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

FACTORY SUPPLIED ALARM

ALARM BELL OPTION

REMOTE STOP

SWITCH

(BY OTHERS)

ICE MODE

SWITCH

(BY OTHERS)

DISCONNECT (BY OTHERS)

FIELD WIRED

ABR

ALARM BELL RELAY

CLOCK

15 A

FUSE

(BY OTHERS)

CHWR

EVAP. PUMP RELAY #1

(BY OTHERS)

120 VAC 1.0 AMP MAX

CHWR

EVAP. PUMP RELAY #2

(BY OTHERS)

120 VAC 1.0 AMP MAX

OFF

TB1

(115 VAC)

82

(24 VAC OR 30 VDC)

TB1-2

1 2

N

FROM TERM. 40 TO 53.

ALARM BELL

RELAY

NO

EVAP. FLOW

SWITCH

(BY OTHERS)

*MANDATORY IF FACTORY FLOW SWITCH OPTION IS NOT SELECTED.

DWG. 330590801 REV. 0D

42 IMM AGS-2

NOR. OPEN PUMP AUX. CONTACTS (OPTIONAL)

EVAP. WATER RESET

(BY OTHERS)

DEMAND LIMIT

(BY OTHERS)

SOLENOID

DRIVER

+

-

+

-

BLACK

WHITE

GREEN

RED

NOTE:

BOX

RED

NOTE: See page 49 for additional

remote evaporator wiring

Figure 24, AGS 120C - 210C Unit Controller Schematic

J11

J12

J13

J14

J15

J1

J2

812

801

J3

803

BLK

RED

BLK

RED

J4

J5

ID1

ID2

ID3

ID4

ID5

ID6

ID7

ID8

IDC1

808

809

810

811

CHWI

U

T

P

U

T

S

CONTROLLER

A+

GND

B-

813

C1

NO1

NO2

NO3

C4

NO4

NO5

NO6

WJ

802

C7

NO8

NC8

NO7

GO

B1

B2

B3

GND

+VDC

S1

67

66

68

60

804

805

806

814

60

67

75

EVAPORATOR

OUTSIDE AIR TEMP (S07)

DEMAND LIMIT (S10)

73

EVAP. WATER TEMP. RESET (S11)

EVAP. LEAVING WATER TEMP (S08)

EVAP. ENTERING WATER TEMP (S09)

MJ

4-20MA

800

75

60

PE

G

PE

SHIELD

69

BLK RED

SHIELD

70

B4

BC4

B5

BC5

BLACK

WHITE

GROUND

PUMP 1

PUMP 2

71

72

PE

UNIT SWITCH

REMOTE SWITCH

EVAP. FLOW SWITCH

MODE SWITCH

FACTORY INSTALLED

FLOW SWITCH

807

MS1

897

BLU

800

RS1

C1

D IG IT A L O

C4

WHTBRN

UNIT ALARM

C8

IMM AGS-2

43

Unit Controller Schematic Continued

855

852

FU10

120V

LINE

CONTACT

LOCATION

TERMINAL BLOCK

AND LEAD NUMBERS

85

82

81

60

75

2

SCHEM. 330590301 REV. 0D

CHWR

2

1

TB1

1

2

60

75

821, 891

801, 807

800, 802, 813

2

75

897, 809

66

67

68

70

71

72

73

81

82

85

60

NOTE:

MJ

820, 822, 850

891

851, F2-2

83

854, F3-2

84

VFD ONLY

69

803

1

FU12

890

115V OUTLET

850

853

(p LAN) TO CIRCUIT CONTROL BOXES

BLACK

WHITE

GROUND

(TERMINATE AT EACH CONTROLLER)

EVAPORATOR PUMP 1

EVAPORATOR PUMP 2

UNIT ALARM

1 2

FU11

1 2

LINE 1

LOAD 1

822

823

824

829

830

83

T2

120V

1

526

24V

1

(SEE LINE 301)

(SEE LINE 307)

B

851

854

REC

W

G

HTR-EVAP

1TS2

LINE 2

LOAD 2

ABR

NO.

-301

MJ

-302

-303

-304

-305

-306

-307

-308

-309

-310

-311

-312

-313

-314

-315

-316

-317

-318

-319

-320

-321

-322

-323

-324

-325

-326

-327

-328

-329

-330

-331

-332

-333

-334

-335

-336

-337

-338

-339

-340

-341

-342

-343

-344

-345

-346

-347

-348

-349

-350

-351

-352

-353

-354

-355

-356

-357

-358

-359

-360

-361

-362

-363

-364

853, 890

852, 855

897, 830

812

810

811

806

804

805

814

829

823

824

TB1-75 THRU

TB1-89 ARE

FIELD WIRING

TERMINALS.

PE

HEATER

2

1

2

C-BOX

HEATER

1

2

821820

(SEE LINE 306)

44

IMM AGS-2

Figure 25, AGS 120C - 210C Circuit Controller Schematic

J2

121

J3

SHIELD

J5

ID1

ID2

ID3

ID4

ID5

ID6

ID7

ID8

IDC1

128

A+

GND

B-

J11

1

J12

C1

NO1

NO2

NO3

J13

C4

NO4

NO5

NO6

WJ

123

J14

C7

NO8

NC8

J15

NO7

GO

B4

BC4

BC5

FAN 1

FAN 2

FAN 3

J4

J6

B6

B7

B8

GND

24V

113

RED

BLK

RED

VG

124

125

141

126

ID9

ID10

ID11

ID12

IDC9

142

N/A ON NON-VFD UNITS

129

131

21

WHT

DIFFERENTIAL PRESSURE SWITCH

PE

MHPR

MECHANICAL HIGH PRESSU RE FAULT

133

134

24

4-20MA

SLIDE LOAD

135

136

20

PE

J16

C9

NO9

NO10

NO11

J17

NO12

NC12

NO13

NC13

J18

C12

120

OHMS

1

FAN 4

FAN 5

MJ

ID13H

IDC13

ID14H

(LOWER LEVEL)

188

40

OIL SEP.

2) ONE HUNDRED SERIES FOR CIRCUIT #1

3) TWO HUNDRED SERIES FOR CIRCUIT #2

22

MJ

139

(SEE LINE 687)

0-10VDC

CS

1

3

J5

J4

882

883

BLACK

WHITE

GREEN

D3

SCOM

SHLD

165

TB1-

GND

A+

B-

DETAIL 2 - THERMISTOR CARD

GUARDISTOR

J3-1

J3-2

REMOTE EVAP. ONLY.

IN SERIES WITH 170

185

142

TB1-28TB1-

29

143

29

165

91

165

TB1-

90

(SEE LINE 693) TO T5

MJ

0-5 VDC

SLIDE LOAD

INDICATOR

116

20

122

EVAP PRESS TRANSDUCER (S01)

RED

WHT

BLK

DISCHARGE PRESS TRANS DUCER (S02)

RED

WHT

BLK

BIAS 5

21 VDC

1

DC GROUND

2

SUCTION TEMP. (S04)

DISCHARGE TEMP. (S05)

BIAS G

114

120

T3

120V

1

2

5

40

6

MJ

40

J1

G

J1

J2

J3

25 26

137 138

B5

PE

N/A ON NON-VFD UNITS

140

FAN VFD

EXV DRIVER

(SEE DETAIL 1)

CIRCUIT SWITCH

STARTER FAULT

127

164

VFD FAULT

INDICATOR

3

2

GREEN

MOTOR

170 171

1 2

LP*

NOTES: 1) * - REPRESENTS CIRCUIT

OLS

GRN

BLK

130

VGD

Y1

164

FLT

COM NO

SASB+

Y2

Y3

Y4

N/A ON VFD UNITS

C1

143

C4

C8

COMPRESSOR SSS CONTACT

HEATER

C9

FAN 6

DPS

C 1

2 4

132

OU TPU T S

D IG IT A L

3

1

J7

ID13

J8

ID14

C13

IMM AGS-2

CONTROLLER

45

Circuit Controller Schematic Continued

ECONOMIZER

1

2

3

4

21

22

24

25

26

27

28

40

50

PE

2

MHPR

151

153

T4

120V

(TO TB1-1)

(SEE LINE 690)

2

PE

2

50

SCHEM. 330590401 REV. 0D

SV

50

PUMPDOWN

DETAIL 1

ANALOG OUTPUT J4-Y3

+

-

PID

GREEN

WHITE

BLACK

+

-

195

196

117

TO: TB1-2

TO: TB1-1

1

5

2

6

24V AC

PUMPDOWN

(TERMINATE AT EACH CONTROLLER)

PE

20

C2

C1

C2

C1

C2

C1

C2

C1

C2

149

SV

187

K1

27

28

155

C2

C1

3-OIL, 135

142, BLK, 130, 2-OIL

163, 2-LOAD, 2-UNLOAD, 190

CB12

197

101

117

1

105, 114, 116, 160

SV

179

2

LIQ

93

174, 178

30

176, 177

880

881

882

883

HEATER

FIELD

EVAPORATOR

FIELD INSTALLED ON REMOTE EVAPORATOR

49

188, 189

49

91

165

29

143

120V

FU7

2 1

41

105

41

(p LAN) TO OTHER CIRCUIT CONTROLLERS AND UNIT CONTROLLER

BLACK

(RESISTOR USED ONLY AT END OF DAISY CHAIN)

WHITE

GROUND

CB11

180 181

184

144

146

148

150

USED ON AGS130-210 UNITS ONLY

USED ON AGS210 UNITS ONLY

152

154

160

162

185

172

173

1

175 176

189

191

192

102

D3 CARD

3

1 2

1

5

LOAD SOLENOID

UNLOAD SOLENOID

186

AGS190-210C

190

910

MHP

24V

ONLY

177

2

6

174

T1

115V

103

(SEE LINE 694)

93

178

4

182

M*1

M*2

M*3

M*6

GRN

SSS RUN

HTR-OIL SEP.

1

CONNECTED REMOTE

M*4

M*5

2

BIAS

BLOCK

-

+

5

G

21

1

SV

TO UNIT CONTROLLER B-

TO UNIT CONTROLLER A+

TO CIRCUIT CONTROLLER J4

183

0 1

145

147

161

163

126

TB1-40 139

EXV

MOTOR

116

120V

RED

T5

NB

EXV

DRIVER

LINE

NO.

-601

-602

-603

-604

-605

-606

-607

-608

-609

-610

-611

-612

-613

-614

-615

-616

-617

-618

-619

-620

-621

-622

-623

-624

-625

-626

-627

-628

-629

-630

-631

-632

-633

-634

-635

-636

-637

-638

-639

-640

-641

-642

-643

-644

-645

-646

-647

-648

-649

-650

-651

-652

-653

-654

-655

-656

-657

-658

-659

-660

-661

-662

-663

-664

-665

-666

-667

-668

-669

-670

-671

-672

-673

-674

-675

-676

-677

-678

-679

-680

-681

-682

-683

-684

-685

-686

-687

-688

-689

-690

-691

-692

-693

-694

-695

-696

-697

-698

-699

-700

-701

TERMINAL BLOCK

AND LEAD NUMBERS

TB*1

180 183, 145 147, 149, 151, 153 155, 161, 187, 197

113, 101, 117, 179

181, MHP-1 MHP-2, 182, 184 122, 124, 127

WHT, 129

3-SLIDE, 133 1-SLIDE, 137

2-SLIDE, 138 172, 1-LOAD 173, 1-UNLOAD

123, 125, 140 132, RED, 134 1-OIL, 136, 139

GRN - OIL, DPS GRN, LOAD, UNLOAD

46

IMM AGS-2

Electrical Data Notes

1. The field wire size designation is explained in

the table to the right that defines the number of wires and conduit recommended. A “2” in parenthesis (2) indicates that two conduits are required.

2. Allowable voltage limits

Unit nameplate 208V/60Hz/3PH: 187V to 229V Unit nameplate 230V/60Hz/3Ph: 207V to 253V Unit nameplate 380V/60Hz/3Ph: 342V to 418V Unit nameplate 460V/60Hz/3Ph: 414V to 506V Unit nameplate 575V/60Hz/3Ph: 517V to 633V

Maximum of 2 percent voltage unbalance.

3. Unit wire size ampacity (MCA) is equal to 125% of the largest compressor-motor RLA plus 100%

of RLA of all other loads in the circuit including control transformer. Wire size ampacity for separate 115V control circuit power is 15 amps.

4. Compressor RLA values are for wire sizing purposes only but do reflect normal operating current

draw at unit rated capacity.

5. Single point power supply requires a single disconnect to supply electrical power to the unit. This

power must be fused.

6. Multiple point power supply requires two independent power circuits.

7. All field wiring to unit power block or optional nonfused disconnect switch must be copper.

8. Field wire size values given in tables apply to 75°C rated wire per NEC.

9. External disconnect switch(s) or HACR breakers must be field supplied.

Sample No. of Wires No. of Conduit

350 MCM 3 1

2-250 MCM 6 1

(2) 250 MCM 6 2

(2) 2-250 MCM 12 2

Note: On single point power units a non-fused disconnect switch in the cabinet is available as an option.

10. All wiring must be done in accordance with applicable local and national codes.

11. Recommended time delay fuse size or HACR breakers is equal to 150% of the largest compressor

motor RLA plus 100% of remaining compressor RLAs and the sum of condenser fan FLAs.

12. Maximum time delay fuse size or HACR breakers is equal to 225% of the largest compressor-

motor RLA plus 100% of remaining compressor RLAs and the sum of condenser fan FLAs.

Power Limitations:

1. Voltage within ± 10 percent of nameplate rating.

2. Voltage unbalance not to exceed 2% with a resultant current unbalance of 6 to 10 times the voltage

unbalance per NEMA MG-1, 1998 Standard.

BAS Interface

Optional Protocol Selectability BAS interfaces: the locations and interconnection requirements for the various standard protocols are found in their respective installation manuals, obtainable from the local McQuay sales office, www.mcquay.com, and also shipped with each unit.

Modbus IM 743 LONW

ORKS

IM 735 BACnet IM 736

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.

IMM AGS-2

47

Remote Evaporator

WATER IN

DX EVAPORATOR

FIELD CONNECTION

SUCTION

CHARGING

330591001-R3

FACTORY PIPING

DISCHARGE

CHECK AND

This section contains data that is unique to AGS-CM/B remote evaporator models including:

• Refrigerant piping on page 49.

• Dimensions on page 51.

• Vibration isolators on page 58.

• Physical data on page 60.

Data common to both packaged and remote evaporator models are:

• Electrical data on page 32.

• Evaporator pressure drop, on page 25.

Piping Layout

Figure 26 shows the piping layout for one of the two refrigerant circuits for AGS units with a remote evaporator. Note that the refrigerant specialties are field installed adjacent to the evaporator. The outdoor unit, the evaporator, and a kit of refrigerant components are shipped as separate pieces. The outdoor unit is shipped with an operating charge of refrigerant. Refrigerant for the evaporator and field refrigerant piping is furnished by the contractor and must be added in the field.

The location and size of the refrigerant (and water) connections are shown on the dimension drawings beginning on page 51. Looking at the control panel, circuit #1 is on the left, #2 on the right.

NOTE: All field piping, wiring, and procedures must be performed in accordance with ASHRAE, EPA, and industry standards.

Figure 26, Piping Schematic (Remote Evaporator)

SCHRADER

LIQUID SHUT-OFF VALVE

LIQUID TUBING

CHARGING

VALVE

AIR

FLOW

FIELD CONNECTION

LIQUID LINE

SCHRADER

VALVE

AIR

FLOW

VALVE

(HEADER)

FILTER

DRIER

DISCHARGE

AIR

FLOW

CONDENSOR

ASSEMBLY

TUBING

SOLENOID

VALVE

SCHRADER

VALVE

RELIEF

VALVE

SHUT-OFF

VALVE

FRAME 3200

COMPRESSOR

WATER OUT

SHUT-OFF

VALVE

SUCTION LINE

RELIEF

VALVE

TUBING

48

IMM AGS-2

SCHRADER

VALVE

SIGHT GLASS

EXPANSION

VALVE

FIELD PIPING

Field Wiring (Remote Evaporator)

Field wiring connections from the remote evaporator to the outdoor unit are shown on Figure 23 on page 42. Additionally, sensor connections 2, 3, and 4 below, are required:

1. The electronic expansion valve has a 30-feet long cable attached and can be used, as is,

when the outdoor unit is less than 30 feet away. Beyond that, a junction box must be located within 30 feet of the evaporator, and up to 70 additional feet of 14GA wire connected from the cable to the unit, allowing up to a total distance of 100 feet (30 feet of cable and up to 70 feet of 14GA).

2. Two evaporator water temperature sensors with 100 feet of cable coiled in the unit

control panel for extension to the evaporator and insertion in fittings located on the side of the inlet and outlet nozzles.

3. One suction line refrigerant temperature sensor per circuit with 100 feet of cable coiled

in the unit control panel for extension to the evaporator. Place the sensor in a brazed well (provided in kit, installed in the field) on the suction line in a straight-flat area, close to the suction line pressure transducer. Install with heat conductive compound and insulate well. If installed on a horizontal pipe run, locate between the 2-4 o’clock position.

4. One suction line pressure transducer per circuit with 100 feet of cable coiled in the unit

control panel for extension to the evaporator. Mount the transducer in the suction line, 2-3 feet from the evaporator head, on the top or side of the pipe. Connection is ¼-inch flare with a flare Schrader.

Kit Components

The kit shipped with the unit has the following components for field installation: Filter-drier and cores Sight glass Electronic expansion valve Solenoid valve Evaporator vent and drain plugs Filter-drier cores for economizer piping Charging Valve (Sizes AGS 180 through 210)

Refrigerant Line Sizing

Layout and size the refrigerant piping in accordance with the latest edition of the ASHRAE Handbook. A line sizing guide can be found below. Keep the refrigerant suction line pressure drop at close to a maximum of 2-degree F. drop in saturated temperature. Each of the two suction line’s velocity must be sufficient to carry oil when considering a capacity reduction of 25% in each circuit.

NOTE: The following applies to all size units:

• Do not run refrigerant piping underground.

• Maximum linear line length can not exceed 75 feet.

• Maximum total equivalent length (TEL) can not exceed 180 feet.

• The evaporator can not be located more than 15 feet above the outdoor unit.

• The evaporator can not be located more than 20 feet below the outdoor unit.

• Suction line connection at unit = 3 5/8 inches.

• Suction line connection at evaporator = 4 1/8 inches.

• Liquid line connection at the unit = 1 3/8.

• Liquid line connection at the evaporator = 1 5/8.

• A piping drawing showing altitudes, line lengths, slopes and all fittings, using Form SF

99006 (Revised 5/02), must be sent to the McQuay Technical Response Center for review prior to entering a unit order.

• When facing the unit control box, the left-hand compressor is circuit # 1, and the right-

hand is compressor # 2. With mix-matched compressor sizes, #1 is the smallest.

IMM AGS-2

49

Table 27, Fitting Equivalent Feet of Pipe

Line Size

In. OD

2 5/8 29.00 69.0 1.0 6.0 4.1 3 1/8 35.0 84.0 1.0 7.5 5.0 3 5/8 41.0 100.0 1.0 9.0 5.9 4 1/8 47.0 120.0 1.0 10.0 6.7

Angle Valve Globe Valve Ball Valve

90 Degree Std.

Radius Elbow

90 Degree Long

Radius Elbow

Table 28, Recommended Horizontal or Downflow Suction Line Size

AGS

Model

120/125

130/135

140/145

160/165

170 to 210

Circuit

Both 3 5/8 0.54 3 5/8 0.80 3 5/8 1.07 3 5/8 1.34 3 5/8 1.61

#1 3 5/8 0.54 3 5/8 0.80 3 5/8 1.07 3 5/8 1.34 3 5/8 1.61 #2 3 5/8 0.71 3 5/8 1.06 3 5/8 1.42 3 5/8 1.77 3 5/8 2.12

Both 3 5/8 0.71 3 5/8 1.06 3 5/8 1.42 3 5/8 1.77 3 5/8 2.12

# 1 3 5/8 0.71 3 5/8 1.06 3 5/8 1.42 3 5/8 1.77 3 5/8 2.12 # 2 3 5/8 1.00 3 5/8 1.51 3 5/8 2.01 4 1/8 1.36 4 1/8 1.63

Both 3 5/8 1.00 3 5/8 1.51 3 5/8 2.01 4 1/8 1.36 4 1/8 1.63

Up to 50

Equiv. Ft.

Size PD Size PD Size PD Size PD Size PD

NOTE: “Size” is tubing size in inches, “PD” is the pressure drop in equivalent degrees F. The line pressure drop can be interpolated by feet.

Up to 75

Equiv. Ft.

Up to 100 Equiv. Ft.

Up to 125 Equiv. Ft.

Up to 150 Equiv. Ft.

Table 29, Recommended Upflow Suction line Size

AGS

Model

120/125

130/135

140/145

160/165

170 to 210

Up to 50

Circuit

Both 3 1/8 1.09 3 1/8 1.64 3 1/8 2.19

#1 3 1/8 1.09 3 1/8 1.64 3 1/8 2.19 #2 3 1/8 0.71 3 1/8 1.06 3 1/8 1.42

Both 3 1/8 0.71 3 1/8 1.06 3 1/8 1.42

# 1 3 1/8 0.71 3 1/8 1.06 3 1/8 1.42 # 2 3 5/8 1.00 3 5/8 1.51 3 5/8 2.01

Both 3 5/8 1.00 3 5/8 1.51 3 5/8 2.01

Equiv. Ft.

Size PD Size PD Size PD

Up to 75

Equiv. Ft.

Up to 100 Equiv. Ft.

NOTE: “Size” is tubing size in inches, “PD” is the pressure drop in equivalent degrees F. The line pressure drop can be interpolated by feet.

Table 30, Recommended Liquid line Size.

AGS

Model

120/125

130/135

140/145

160/165

170 to 210

Circuit

Both 1 3/8 0.69 1 3/8 1.04 1 3/8 1.39 1 3/8 1.74 1 3/8 2.08

#1 1 3/8 0.69 1 3/8 1.04 1 3/8 1.39 1 3/8 1.74 1 3/8 2.08 #2 1 3/8 0.92 1 3/8 1.37 1 3/8 1.83 1 3/8 2.29 1 3/8 2.75

Both 1 3/8 0.92 1 3/8 1.37 1 3/8 1.83 1 3/8 2.29 1 3/8 2.75

# 1 1 3/8 0.92 1 3/8 1.37 1 3/8 1.83 1 3/8 2.29 1 3/8 2.75 # 2 1 3/8 1.30 1 3/8 1.95 1 3/8 2.6 1 3/8 3.25 1 3/8 3.90

Both 1 3/8 1.30 1 3/8 1.95 1 3/8 2.6 1 3/8 3.25 1 3/8 3.90

Up to 50

Equiv. Ft.

Size PD Size PD Size PD Size PD Size PD

NOTE: “Size” is tubing size in inches, “PD” is the pressure drop in equivalent degrees F. The line pressure drop can be interpolated by feet.

Up to 75

Equiv. Ft.

Up to 100 Equiv. Ft.

Up to 125 Equiv. Ft.

Up to 150 Equiv. Ft.

50

IMM AGS-2

Dimensions, Unit with Remote Evaporator

330712801D010C

AGS-C-120-130-140-160

186.6 (4739.6)

SUCTION

330712801D020C

AGS-C-125-135-145-170

224.8 (5709.9)

SUCTION

(3.62 O.D.)

CONNECTION

( 1.38 O.D.)

0.875

KNOCK-OUT

( QTY 4 TOTAL)

Figure 27, Models AGS 120CM/B, 130CM/B, 140CM/B, 160CM/B

LIQUID

CONNECTION

( 1.38 O.D.)

CONNECTION

( 3.62 O.D.)

Circuit # 2

Circuit #1

100.4

(2550.2)

FIELD CONTROL

(2) CONNECTIONS

LIQUID CONNECTIONS

(NOTE: COMPRESSORS HIDDEN)

(2) POWER ENTRY

88.5 (2247.9)

Figure 28, Models AGS 125CM/B, 135CM/B, 145CM/B, 170CM/B

LIQUID

CONNECTION

0.875

KNOCK OUT

( QTY 4 TOTAL)

FIELD CONTROL

(2) CONNECTIONS

IMM AGS-2

(2) POWER

ENTRY

51

Figure 29, AGS 165CM/B – AGS 175CM/B (with Remote Evaporator)

330712801D030A

AGS-C-165-175

263.0 (6680.2)

SUCTION

(3.12 O.D.)

330712801D020C

AGS-C-180-190

224.8 (5709.9)

LIQUID

SUCTION

0.875

KNOCK OUT

( QTY 4 TOTAL)

100.4

(2550.2)

FIELD CONTROL

(2) CONNECTIONS

88.5 (2247.9)

(2) POWER

ENTRY

LIQUID

CONNECTION

( 1.38 O.D.)

CONNECTION

Figure 30, AGS 180CM/B - AGS 190CM/B (with Remote Evaporator)

0.875

KNOCK OUT

( QTY 4 TOTAL)

100.4

(2550.2)

FIELD CONTROL

(2) CONNECTIONS

88.5 (2247.9)

(2) POWER

ENTRY

LIQUID CONNECTIONS

CONNECTION

( 1.38 O.D.)

CONNECTION

(3.62 O.D.)

52

IMM AGS-2

0.875

330712801D030C

AGS-C-195-210

263.0 (6680.2)

LIQUID CONNECTION

SUCTION

KNOCK OUT

( QTY 4 TOTAL)

Figure 31, AGS 195CM/B - AGS 210CM/B (with Remote Evaporator)

CONNECTION

( 1.38 O.D.)

(3.62 O.D.)

100.4

(2550.2)

FIELD CONTROL

(2) CONNECTIONS

88.5 (2247.9)

(2) POWER

ENTRY

LIQUID CONNECTIONS

IMM AGS-2

53

Evaporators

EVAP. - AGS 120C-140C

8.8

(223.5)

68.0 (1727.2)

06.00 SCH 40 PIPE

72.3 (1836.4)

85.6 (2174.2)

18.2

(462.3)

92.2 (2341.9)

1.6

2.8 (71.1)

HEATER

11.9

90°

AGS 160C

68.0 (1727.2)

(508.0)

8.8

(223.5)

1/2" NPTF

3000# HALF CPLG.

08.00 SCH 40 PIPE

VICTAULIC GROOVED

70.3 (1786.0)

85.6 (2174.2)

22.5

(572.0)

92.9 (2359.7)

HEATER

13.9 (353.1)

90°

SUCTION

Figure 32, Evaporator for AGS 120C - 140C

2.6 (66.0)

01.625 IDS. FLANGE

(QTY. 2)

12.4

(315.0)

(302.3)

3.0

(76.2)

MTG.

DWG. 330645800

3.0

(76.2)

12.4

(315.0)

2.6 (66.0)

04.125 IDS. FLANGE

(QTY. 2)

HEATER LEADS

21.7

(551.2)

QTY.4

LIQUID

(40.6)

16.0

(406.4)

0.69 HOLES

3.9 (99.1)

OUTLET

VICTAULIC GROOVED

(QTY. 2)

1/4" NPTF

(QTY. 2)

1/2" NPTF

(QTY. 2)

1/2" NPTF

3000# HALF CPLG.

(QTY. 2)

INLET

LEADS

SUCTION

Figure 33, Evaporator for AGS 160C, AGS 125C - 135C

3.7

3.0 (76.2)

01.625 IDS. FLANGE (QTY. 2)

12.4

(315.0)

(94.0)

MTG.

DWG. 330645900

EVAP - AGS 125C-135C

12.4

(315.0)

3.0 (76.2)

04.125 IDS. FLANGE

(QTY. 2)

HEATER LEADS

23.7

(601.9)

LIQUID

3.9 (99.1)

1.6 (40.6)

20.0

0.69 HOLES

QTY.4

(QTY 2)

OUTLET

1/4" NPTF

(QTY. 2)

1/2" NPTF

(QTY. 2)

LEADS

4.7 (119.4)

(QTY. 2)

INLET

54

IMM AGS-2

Figure 34, Evaporator for AGS 145C

EVAP - AGS 145C

8.8

(223.5)

90.6 (2301.2)

06.00 SCH 40 PIPE

VICTAULIC GROOVED

QTY.4

95.0 (2413.0)

18.2

(462.3)

2.8 (71.1)

1.6

HEATER

11.9

90°

SUCTION

AGS 170C-210C

90.6 (2301.2)

(508.0)

8.8

(223.5)

08.00 SCH 40 PIPE

VICTAULIC GROOVED

22.5

(572.0)

4.7 (119.4)

1.6

1/2" NPTF

1/4" NPTF

HEATER

90°

SUCTION

2.6 (66.0)

01.625 IDS. FLANGE

(QTY. 2)

12.4

(315.0)

(48.3)

3.0

(76.2)

MTG.

DWG. 330646000

3.0 (76.2)

12.4

(315.0)

2.6 (66.0)

04.125 IDS. FLANGE

(QTY. 2)

LIQUID

HEATER LEADS.

21.7

(5512)

0.69 HOLES

3.9 (99.1)

(40.6)

16.0

(406.4)

OUTLET

(QTY. 2)

108.3 (2750.8)

114.9 (2918.5)

1/4" NPTF

(QTY. 2)

1/2" NPTF

(QTY. 2)

1/2" NPTF

3000# HALF CPLG.

(QTY. 2)

LEADS.

INLET

3.0 (76.2)

01.625 IDS. FLANGE (QTY. 2)

12.4

(315.0)

Figure 35, Evaporator for AGS 165C - 195C, AGS 170C - 210C

13.9 (353.1)

3.7

(93.9)

330646100

EVAP - AGS 165C-195C

3.7 (93.9)

(315.0)

MTG.

3.0 (76.2)

12.4

HEATER LEADS

04.125 IDS. FLANGE

(QTY. 2)

23.7

(601.9)

QTY.4

LIQUID

(40.6)

0.69 HOLES

3.9 (99.1)

OUTLET

QTY. 2

20.0

92.9 (2359.7)

108.3 (2750.8)

115.6 (2936.2)

(QTY. 2)

1/2" NPTF

3000# HALF CPLG.

(QTY. 2)

INLET

LEADS

IMM AGS-2

55

Lifting and Mounting Dimensions and Weights, Remote Evaporator

" G "

Figure 36, Mounting and Lifting Dimensions

" E "

" F "

" D "

" C "

M4M2

C/G

CONTROL BOX

44.00

L3L2

M6

M1 M3 M5

" A "

L1

" B "

L4

3307127-00-04

AGS

MODEL

120

125

130

135

140

145

160

165

170

175

180

190

195

210

A B C D E F G

36.00 136.60 12.00 57.30 174.60 61.36 186.60

36.00 168.85 12.00 69.25 212.80 74.80 224.80

36.00 136.60 12.00 57.30 174.60 61.36 186.60

36.00 168.85 12.00 69.25 212.80 74.80 224.80

36.00 136.60 12.00 57.30 174.60 61.36 186.60

36.00 168.85 12.00 69.25 212.80 74.80 224.80

36.00 136.60 12.00 57.30 174.60 61.36 186.60

36.00 189.00 12.00 84.00 251.00 86.83 263.00

36.00 168.85 12.00 69.25 212.80 74.80 224.80

36.00 189.00 12.00 84.00 251.00 86.83 263.00

36.00 168.85 12.00 69.25 212.80 74.80 224.80

36.00 188.77 12.00 84.00 251.00 86.83 263.00

NOTES:

1. Center of gravity (f) is calculated from shipping weight.

2. Dimensions in inches.

DIMENSIONS IN INCHES

56

IMM AGS-2

Table 31, Lifting and Mounting Weights, Aluminum Fins (Remote Evaporator)

AGS

MODEL

120

125

130

135

140

145

160

165

170

175

180

190

195

210

NOTE: Refer to Figure 36.

Lifting Weights Mounting Weights

L1 & L2 L3 & L4 M1 & M2 M3 & M4 M5 & M6

lbs. kg lbs. kg lbs. kg lbs. kg lbs. kg lbs. kg

3029 1375 1021 464 1747 793 1488 676 815 370 8100 8100

3169 1439 1307 593 1910 867 1632 741 935 424 8952 8952

3029 1375 1021 464 1747 793 1488 676 815 370 8100 8100

3169 1439 1307 593 1910 867 1632 741 935 424 8952 8952

3029 1375 1021 464 1747 793 1488 676 815 370 8100 8100

3169 1439 1307 593 1910 867 1632 741 935 424 8952 8952

3029 1375 1021 464 1747 793 1488 676 815 370 8100 8100

3196 1451 1590 722 2071 940 1741 790 974 442 9571 9571

3169 1439 1307 593 1910 867 1632 741 935 424 8952 8952

3196 1451 1590 722 2071 940 1741 790 974 442 9571 9571

3169 1439 1307 593 1910 867 1632 741 935 424 8952 8952

3196 1451 1590 722 2071 940 1741 790 974 442 9571 9571

Operating &

Shipping

Weights

Table 32, Lifting and Mounting Weights, Copper Fins (Remote Evaporator)

Operating &

Shipping

Weights

AGS

MODEL

120

125

130

135

140

145

160

165

170

175

180

190

195

210

Lifting Weights Mounting Weights

L1 & L2 L3 & L4 M1 & M2 M3 & M4 M5 & M6

lbs. kg lbs. kg lbs. kg lbs. kg lbs. kg lbs. kg

3348 1520 1340 608 1960 890 1701 772 1028 467 9376 4257

3568 1620 1706 775 2176 988 1898 862 1201 545 10548 4789

3348 1520 1340 608 1960 890 1701 772 1028 467 9376 4257

3568 1620 1706 775 2176 988 1898 862 1201 545 10548 4789

3348 1520 1340 608 1960 890 1701 772 1028 467 9376 4257

3568 1620 1706 775 2176 988 1898 862 1201 545 10548 4789

3348 1520 1340 608 1960 890 1701 772 1028 467 9376 4257

3675 1668 2069 939 2390 1085 2060 935 1293 587 11487 5215

3568 1620 1706 775 2176 988 1898 862 1201 545 10548 4789

3675 1668 2069 939 2390 1085 2060 935 1293 587 11487 5215

3568 1620 1706 775 2176 988 1898 862 1201 545 10548 4789

3675 1668 2069 939 2390 1085 2060 935 1293 587 11487 5215

NOTE: Refer to Figure 36.

IMM AGS-2

57

Vibration Isolators, Remote Evaporator

The vibration isolator specific locations and the kit numbers shown on the following two pages are based

on Figure 36 and the weights shown on the previous page.

Table 33, Spring Vibration Isolators, AGS 120C – 210C, Aluminum Fin

AGS

Model

120

125

130

135

140

145

160

165

170

175

180

190

195

210

M1 M2 M3 M4 M5 M6 Kit Number

CP2-28 CP2-28 CP2-27 CP2-27 CP1-28 CP1-28

GREEN GREEN ORANGE ORANGE GREEN GREEN

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-28 CP2-28 CP2-27 CP2-27 CP1-28 CP1-28

GREEN GREEN ORANGE ORANGE GREEN GREEN

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-28 CP2-28 CP2-27 CP2-27 CP1-28 CP1-28

GREEN GREEN ORANGE ORANGE GREEN GREEN

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-28 CP2-28 CP2-27 CP2-27 CP1-28 CP1-28

GREEN GREEN ORANGE ORANGE GREEN GREEN

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

Mounting Location

330904121

330904122

330904121

330904122

330904121

330904122

330904121

330904122

Table 34, Neoprene-in-Shear Isolators, AGS 120C – 210C, Aluminum Fin

AGS

Model

120

125

130

135

140

145

160

165

170

175

180

190

195

210

58

IMM AGS-2

M1 M2 M3 M4 M5 M6 Kit Number

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, BLACK RP-4, BLACK

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED 330904112

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, BLACK RP-4, BLACK 330904111

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED

RP-4, GRN RP-4, GRN RP-4, RED RP-4, RED RP-4, BLACK RP-4, BLACK 330904131

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED

Mounti ng Location ( See Footprint D ra wings, page 13)

330904111

330904112

Table 35, Spring Vibration Isolators, AGS 120C – 210C, Copper Fin (Remote Evaporator)

AGS

Model

120

125

130

135

140

145

160

165

170

175

180

190

195

210

M1 M2 M3 M4 M5 M6 Kit Number

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-28 CP2-28 CP1-31 CP1-31

GRAY GRAY GREEN GREEN WHITE WHITE

CP2-32 CP2-32 CP2-31 CP2-31 CP2-31 CP2-31

WHITE WHITE GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-32 CP2-32 CP2-31 CP2-31 CP2-31 CP2-31

WHITE WHITE GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-31 CP2-31 CP2-31 CP2-31 CP2-31 CP2-31

GRAY GRAY GRAY GRAY GRAY GRAY

CP2-32 CP2-32 CP2-31 CP2-31 CP2-31 CP2-31

WHITE WHITE GRAY GRAY GRAY GRAY

CP2-32 CP2-32 CP2-31 CP2-31 CP2-31 CP2-31

WHITE WHITE GRAY GRAY GRAY GRAY

Mounting Location

330904122

330904123

330904122

330904123

330904122

330904123

330904122

330904105

330904123

330904105

330904123

330904105

IMM AGS-2

Table 36, Neoprene-in-Shear Isolators, AGS 120C – 210C, Copper Fin

AGS

Model

120

125

130

135

140

145

160

165

170

175

180

190

195

210

M1 M2 M3 M4 M5 M6 Kit Number

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, BLK RP-4, BLK

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED

RP-4, GRN RP-4, GRN RP-4, RED RP-4, RED RP-4, BLK RP-4, BLK 330904131

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED 330904112

RP-4, GRN RP-4, GRN RP-4, GRN RP-4, GRN RP-4, RED RP-4, RED 330904113

RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED RP-4, RED

RP-4, GRN RP-4, GRN RP-4, GRN RP-4, GRN RP-4, RED RP-4, RED

Mounti ng Location ( See Footprint D ra wing, page 13)

330904111

330904112

330904113

59

Physical Data, Standard Efficiency

Table 37, Physical Data, AGS 120C – AGS 140C (Remote Evaporator)

DATA

BASIC DATA

Unit Operating Charge lbs (kg), Note 1 131 (59) 131 (59) 131 (59) 131 (59) 131 (59) 131 (59) Cabinet Dimensions

L x W x H, in. (mm) Outdoor Unit Operating Weight, lbs. (kg) 8100 (36770 8952 (4064) 8100 (36770 Outdoor Unit Shipping Weight, lbs (kg) 8100 (36770 8952 (4064) 8100 (36770 Add for Copper Fins, lbs (kg) 1276 (579) 1596 (725) 1276 (579)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 60 (211) 60 (211) 60 (211) 70 (246) 70 (246) 70 (246)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 197 (89) 197 (89) 197 (89) 197 (89) 164 (74) 164 (74)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans – 30 in. Fan Dia. 8 8 8 No. of Motors -- hp (kW) 8 2 (1.5) 8 2 (1.5) 8 2 (1.5) Fan & Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, fpm (m/s) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, cfm (l/s) 86900 (41020) 86900 (41020) 86900 (41020)

REMOTE EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length in.(mm) - in. (mm)

Operating Weight, lbs (kg) 1282 (562) 1282 (562) 1282 (562) Shipping Weight, lbs (kg) 875 (397) 875 (397) 875 (397) Evaporator R-134a Charge lbs (kg) 1.95 (0.9) 1.95 (0.9) 1.95 (0.9) 1.95 (0.9) 1.95 (0.9) 1.95 (0.9) Water Volume, gallons (liters) 49 (185) 49 (185) 49 (185) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427) 352 (2427)

120C 130C 140C

Ckt 1 Ckt 2 Ckt 1 Ckt 2 Ckt 1 Ckt 2

187 x 89 x 101

4750 x 2261 x 2565

15.5 x 82.4

(394 x 2093)

NOTE: Charge quantity does not include field piping.

AGS MODEL NUMBER

187 x 89 x 101

4750 x 2261 x 2565

15.5 x 82.4

(394 x 2093)

187 x 89 x 101

4750 x 2261 x 2565

15.5 x 82.4

(394 x 2093)

Table 38, Physical Data, AGS 160C – AGS 180C (Remote Evaporator)

AGS MODEL NUMBER

DATA 160C 170C 180C

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

BASIC DATA

Unit Operating Charge, lbs (kg) 131 (59) 131 (59) 159 (72) 159 (72) 171 (78) 171 (78)

Cabinet Dim., L x W x H, in. (mm)

Outdoor Unit Operating Wt, lbs. (kg) 8100 (36770 8952 (4064 8952 (4064 Outdoor Unit Shipping Wt, lbs (kg) 8100 (36770 8952 (4064 8952 (4064 Add for Copper Fins, lbs (kg) 1276 (579) 1596 (725) 1596 (725)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 70 (246) 85 (299) 85 (299) 85 (299) 95 (334) 95 (334)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 197 (89) 197 (89) 247 (112) 247 (112) 247 (112) 247 (112)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans; Fan Dia., in. (mm) 8 10 10 No. of Motors – hp (kW) 8 2 (1.5) 10 2 (1.5) 10 2 (1.5) Fan & Motor RPM, 50Hz 1140 1140 1140 60 Hz Fan Tip Speed, fpm 8950 (4224) 8950 (4224) 8950 (4224) m60 Hz Total Unit Airflow, cfm (l/s) 86900 (41020) 108630 (51280) 108630 (51280)

REMOTE EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.,Tube Length in.(mm)

Operating Weight, lbs (kg) 1916 (870) 2283 (1037) 2283 (1037) Shipping Weight, lbs (kg) 1224 (556) 1400 (636) 1400 (636) Evaporator R-134a Charge lbs (kg) 2.53 (1.1) 2.53 (1.1) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) Water Volume, gallons (liters) 83 (314) 106 (401) 106 (401) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427) 352 (2427)

187 x 89 x 101

4750 x 2261 x 2565

19.4 x 82.4

(493 x 2093)

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 105.1 (493 x 2670)

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 105.1 (493 x 2670)

60

IMM AGS-2

Table 39, Physical Data, AGS 190C – AGS 210C (Remote Evaporator)

DATA

BASIC DATA

Unit Operating Charge lbs (kg) 172 (78) 172 (78) 201 (91) 201 (91) Cabinet Dimensions

L x W x H, in. (mm) Unit Shipping Weight, lbs (kg) 8952 (4064) 9571 (4345 Unit Operating Weight, lbs. (kg) 8952 (4064) 9571 (4345 Add for Copper Fins, lbs (kg 1596 (725) 1916 (870)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 95 (334) 95 (334) 95 (334) 95 (334)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 247 (112) 247 (112) 296 (134) 296 (134)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans -- Fan Dia., in. (mm) 10 12 No. of Motors -- hp (kW) 10 2 (1.5) 12 2.5 (1.9) Fan & Motor RPM, 50Hz 1140 1140 60 Hz Fan Tip Speed, fpm (m/s) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, cfm (l/s) 108630 (51280) 130360 (61530)

REMOTE EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length in.(mm) - in. (mm)

Operating Weight, lbs (kg) 2281 (1036) 2281 (1036) Shipping Weight, lbs (kg) 1437 (652) 1437 (652) Evaporator R-134a Charge lbs (kg) 3.63 (1.6) 3.63 (1.6) 3.63 (1.6) 3.63 (1.6) Water Volume, gallons (liters) 106 (401) 104 (392) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427)

AGS 190C AGS 210C

Ckt 1 Ckt 2 Ckt 1 Ckt 2

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 105.1

(493 x 2670)

263 x 89 x 101

6680 x 2261 x 2565

19.4 x 105.1

(493 x 2670)

Physical Data, High Efficiency

Table 40, Physical Data, AGS 125C – AGS 145C (Remote Evaporator)

DATA

BASIC DATA

Unit Operating Charge lbs (kg) 159 (72) 159 (72) 159 (72) 159 (72) 159 (72) 159 (72) Cabinet Dimensions

L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) 8952 (4064 8952 (4064 8952 (4064 Unit Shipping Weight, lbs (kg) 8952 (4064 8952 (4064 8952 (4064 Add for Copper Fins, lbs (kg 1596 (725) 1596 (725) 1596 (725)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 60 (211) 60 (211) 60 (211) 70 (246) 70 (246) 70 (246)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 247 (112) 247 (112) 247 (112) 247 (112) 247 (112) 247 (112)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans -- Fan Dia., in. (mm) 10, 30 (762) 10, 30 (762) 10, 30 (762) No. of Motors -- hp (kW) 10 2 (1.5) 10 2 (1.5) 10 2 (1.5) Fan & Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, fpm (m/s) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, cfm (l/s) 108630 (51280) 108630 (51280) 108630 (51280)

REMOTE EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length in.(mm) - in. (mm)

Operating Weight, lbs (kg) 1916 (870) 1916 (870) 1525 (692) Shipping Weight, lbs (kg) 1224 (556) 1224 (556) 1005 (456) Evaporator R-134a Charge lbs (kg) 2.53 (1.1) 2.53 (1.1) 2.53 (1.1) 2.53 (1.1) 2.44 (1.1) 2.44 (1.1) Water Volume, gallons (liters) 83 (314) 83 (314) 62 (236) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427) 352 (2427)

125C 135C 145C

Ckt 1 Ckt 2 Ckt 1 Ckt 2 Ckt 1 Ckt 2

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 82.4

(493 x 2093)

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 82.4

(493 x 2093)

225 x 89 x 101

5715 x 2261 x 2565

19.4 x 105.1

(493 x 2670)

IMM AGS-2

61

Table 41, Physical Data, AGS 165C – AGS 195C (Remote Evaporator)

DATA

BASIC DATA

Unit Operating Charge lbs (kg) 186 (84) 186 (84) 186 (84) 186 (84) 201 (91) 201 (91) Cabinet Dimensions

L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) 9571 (4345) 9571 (4345) 9571 (4345) Unit Shipping Weight, lbs (kg) 9571 (4345) 9571 (4345) 9571 (4345) Add for Copper Fins, lbs (kg 1916 (879) 1916 (879) 1916 (879)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 70 (246) 85 (299) 85 (299) 85 (299) 95 (334) 95 (334)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLER

Pumpdown Capacity, lbs (kg) 296 (134) 296 (134) 296 (134) 296 (134) 296 (134) 296 (134)

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

No. of Fans -- Fan Dia., in. (mm) 12 12 12 No. of Motors -- hp (kW) 12 2 (1.5) 12 2 (1.5) 12 2 (1.5) Fan & Motor RPM, 60Hz 1140 1140 1140 60 Hz Fan Tip Speed, fpm (m/s) 8950 (4224) 8950 (4224) 8950 (4224) 60 Hz Total Unit Airflow, cfm (l/s) 130360 (61530) 130360 (61530) 130360 (61530)

REMOTE EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length in.(mm) - in. (mm)

Operating Weight, lbs (kg) 2283 (1037) 2283 (1037) 2281 (1036) Shipping Weight, lbs (kg) 1400 (636) 1400 (636) 1437 (652) Evaporator R-134a Charge lbs (kg) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) 3.16 (1.4) 3.63 (1.6) 3.63 (1.6) Water Volume, gallons (liters) 106 (401) 106 (401) 106 (401) Max. Water Pressure, psi (kPa) 152 (1048) 152 (1048) 152 (1048) Max. Refrigerant Press., psi (kPa) 352 (2427) 352 (2427) 352 (2427)

165C 175C 195C

Ckt 1 Ckt 2 Ckt 1 Ckt 2 Ckt 1 Ckt 2

263 x 89 x 101

6680 x 2261 x 2565

19.4 x 105.1 (493 x 2670)

AGS MODEL NUMBER

263 x 89 x 101

6680 x 2261 x 2565

19.4 x 105.1

(493 x 2670)

263 x 89 x 101

6680 x 2261 x 2565

19.4 x 105.1 (493 x 2670)

62

IMM AGS-2

Solid State Starters

Solid state starters are standard on all AGS units. A solid state starter uses a siliconcontrolled rectifier (SCR) power section to allow a motor to be brought to full speed with a reduced initial voltage that increases to full line voltage over a given time. The McQuay motor starter, custom designed for this specific application, is microprocessor controlled. Along with this starting technique, the motor starter also provides protection for the motor and monitors its load conditions.

The starter offers:

• Solid state design.

• Closed-loop motor current control.

• Programmable motor protection.

• Programmable operating parameters.

• Programmable metering options.

The three-phase starter contains a six-SCR power section with two SCRs per phase connected in inverse parallel. This power section is capable of providing maximum torque per amp throughout the motor’s speed-torque curve with minimal motor and starter heating. At the same time, the starter continually monitors the amount of current being delivered to the motor, thus helping to protect the motor from overheating or drawing excessive current. The starter will automatically stop the motor if the line-to-line current is not within acceptable ranges, or if the current is lost in a line. The motor current scaling is set according to the motor size and the specific application. The starter circuitry is contained on a single printed circuit board, which contains all the logic and SCR gate drive circuitry.

Operating messages are displayed on a three-character LED display located in the unit control panel. The LED display on the control card displays:

• Operating messages that indicate the status of the motor and/or starter.

• Operating parameters that are programmed into the starter.

• Fault codes that indicate a problem with the motor application or starter.

Operating Messages

Possible operating messages are as follows:

Message Meaning noL Line voltage is not present.

rdy Line voltage is present and starter is ready.

acc Motor is accelerating after a start command has been received.

uts The motor has achieved full speed.

run Motor is operating at full speed, and ramp time has expired.

dCL A Stop command was received and the motor is decelerating with the set

deceleration profile.

IMM AGS-2

63

OL OL will alternately blink with the normal display on the LED display when

motor thermal overload content has reached 90% to 99% of its capacity.

OLL The motor thermal overload content has reached 100%, and the motor has

stopped. The motor cannot be restarted until the overloaded motor has cooled and OLt is displayed.

OLt The motor thermal overload content has been reduced to 60% or less, and

the motor can be restarted.

ena Passcode protection is enabled.

dis Passcode is disabled.

oxx xx = overload thermal content in percentage. Press the Down button to

toggle to this display.

cxx xx = pending fault.

no Attempted to change a passcode protected parameter without proper

security.

… Three decimal places blink when remote display is active.

Fxx xx Fault Code

Table 42, Fault Codes

Number Des cr iption

00 No Fa ul t -- --

01 UTS Time L imit Expired Y Y

02 Motor T herm al Overload Trip Y N

10 Pha se Rotation E rror, Not A-B-C N Y

12 Low Line Frequency N Y

13 High Line Frequency N Y

15 Inp ut Power Not Three phase N Y

21 Low Line L1-L2 Vo lt age Y Y

22 Low Line L2-L3 Vo lt age Y Y

23 Low Line L3-L1 Vo lt age Y Y

24 High Li ne L1-L2 Voltage Y Y

25 High Li ne L2-L3 Voltage Y Y

26 High Li ne L3-L1 Voltage Y Y

27 Pha se loss N Y

28 No Li ne Voltage N Y

30 I.O.C. (Inst antaneous Overcurrent) N N

31 Overcurrent Y N

37 Current I mbalance Y Y

38 Ground Fa ul t Y N

39 No Current At Run N Y

40 Shorted/Open SCR N N

47 Stack Prot ec tion Fault N Y

48 Bypas s Contact or F ault (on STOP input) Y N

50 Control Power Low N Y

Continued next page

Controlled

Stop

Auto

Res et

64

IMM AGS-2

Number Des cr iption

51 Current S ensor Offse t Error -- N

52 Burden Swit ch Error N N

60 Therm istor T ri p N N

61 Stack OT Swi tch Trip N N

71 Ana lo g Input Trip Y Y

82 Modbus Ti me-out Y Y

94 CPU E rror – Software Fault N N

95 CPU E rror – Parame ter Storage Fault N N

96 CPU E rror – Illegal Instructi on Trap N N

97 CPU E rror – Software W atc hd og Fault N N

98 CPU E rror – Spurious I nterrupt N N N

99 CPU E rror – Program Storage Fault N N

Controlled

Stop

Starter Planned Maintenance

During commissioning:

• Torque all power connections during commissioning. This includes factory-wired

components.

• Check all of the control wiring in the package for loose connections.

During the first month after the starter has been put in operation:

• Re-torque all power connections every two weeks. This includes factory-wired

components.

• Inspect cooling fans (if applicable) after two weeks for proper operation.

After the first month of operation:

• Re-torque all power connections every year.

• Clean any accumulated dust from the starter using a clean source of compressed air.

• Inspect the cooling fans every three months for proper operation.

• Clean or replace any air vent filters on the starter every three months.

Auto

Res et

IMM AGS-2

NOTE: If mechanical vibrations are present at the installation site, inspect the connections more frequently.

65

Figure 37, Trouble Shooting Guide

N

Start

Replace

Fuses

Replace

Circuit

Breaker

Correct

Inline Fault

o

Fuses OK?

Circuit

Breaker OK?

Yes

In-Line OK?

Yes

Correct Power

Source

Problem

Yes

Low or Missing

1

Phase Order

2

Thermal Trip?

Yes

o

Wiring OK?

Control Card

3

Line?

o

4

Yes

Fault

oYes

5

Yes

o

6

Interlock

Open?

o

7

Yes Yes

Replace

Swap Any

2 Power

Leads

High

Ambient?

Correct and

Wait to Cool

8

o

Yes

Circulation?

9

Bad Air

o

Correct

Interlock

State

Correct

Wiring

o

Does Problem

Still Exist

Yes

Go to Page 39

Correct Wiring

Return To

Service

o

Return To

Service

Wiring OK?

Yes

Correct and

Wait to Cool

o

7

Motor

Overloaded?

Yes

Lower Motor

Load

66

IMM AGS-2

10

e

s

e

s

Yes

N

o

N

o

N

o

N

o

blem?

ror

Motor

act

a

w

stanc

e

Replace

ControlCard

CheckJumper

s

Parameter

s

andCT

s

DoesProblem

StillExist?

Contact

From Previous Page

11

Current

Imbalance Fault?

Yes

No

Correct Wiring

Replace

Defective SCRs

No

7

Wiring Good?

Yes Y

12

Motor

Winding Short?

No

SCRs OK?

Yes Y

All Gate

Pulses Present?

No

Replace

Control Card

Yes

13

14

Yes

Fuses Blown or

Breaker Tripped?

Replace Fuse

or Reset Breaker

Motor Pro

Repai

Replace

Cont

Bensh

For Assi

12

CT Burden

Switches Set

Correctly?

15

IMM AGS-2

Return to

Normal

Operation

McQuay

For Assistance

67

FLOW CHART DETAILS:

1. Fuses Determine if power line fuses have been installed, and if

they are operating properly.

2. Circuit Breaker Determine if the circuit breaker is off, or has tripped and

disconnected the line from the starter.

3. Power Line Voltage Verify that line voltage is present, and that it is the correct

voltage.

4. Phase Order Fault If Fault Codes F1 or F2 are displayed on the control card

LED display, exchange any two incoming power line cable connections.

5. Heat Sink Switch Investigate whether heat sink thermal switch is open.

6. Safety Device Determine if an equipment protection device attached to

the starter is disabling the start command.

7. Wiring Connections Verify that the wiring connections are correct and that the

terminations are tightened.

8. Air Temperature Investigate whether the air temperature surrounding the

heat sink is hot.

9. Air Circulation Determine if the airflow around the heat sink fins is being

restricted, or if a fan has failed.

10. Motor Overload Determine if the motor’s load is too large for the motor

size.

11. Current Imbalance Fault If Fault Codes F23 or F24 are displayed on the control

card LED display, diagnose and correct the cause of the current imbalance parameter P16.

12. Motor Winding Problem Conducting a megger test of the motor can identify an

internal motor winding problem. NOTE: To avoid damaging the starter isolate the motor before conducting the megger test.

WARNING

Hazardous voltages exist at the starter terminals. Lock out and tag all power sources

before making resistance measurements to avoid personal injury or death.

13. SCRs This step can help determine if a problem exists with the

SCRs. Using a multi-meter or similar device, measure the resistance between:

•

L1 terminal and T1 terminal

•

L2 terminal and T2 terminal

•

L3 terminal and T3 terminal

The resistance should be more than 50k ohms. Measure the gate resistance between the white and red of each twisted pair (6 total). The gate resistance should be between 8 and 50 ohms.

14. Gate Pulses

This step can help to determine if the control card is functioning properly. Check for gate firing voltage between 0.3 and 1.5 volts when the card is operating.

15. Motor Current

68

IMM AGS-2

Determine if motor current signal scaling is correct.

Solid State Starter Settings

Operating Parameters Settings for Default Value and Settable Range:

Table 43, Starter Settings

No. Operating Parameter Default Range of Setting

P1

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

P12

P13

P14

P15

P16 Rated RMS Voltage 460

P17

P18

P19

P20

P21

P22

P23

P24

P25

P26

P27

P28

P29

P30

P31

P32

Motor Full Load Amps (FLA) 1A 1 to 9999A

Motor Rated Load Amps (RLA) 1A 1 to 9999A

Motor Service Factor 1.25 1-1.99

Motor Overload Class 10 1-40,Off

Initial Motor Starting Current 225% 50 - 400%

Max. Motor Starting Current 300% 100 – 800%

Motor Ramp Time 7 sec 0 - 300 sec

UTS time 10 sec 1 - 900 sec

Stop Mode Cos Coast/Voltage decel

Deceleration Level 1 40% 0 – 100%

Deceleration Level 2 20% 0 – 50%

Deceleration Time 2 sec 1 – 180 sec

Default Meter Display 0(Status) 0-19

Overcurrent Trip Level 140% Off, 50 to 800%RLA

Overcurrent Trip Time 2 sec Off, .1 – 90 sec

100,110,120,200,208,220,230,24

0,350,380,400,415,440,460,480,

500,525,575,600,660,690,1000

Overvoltage Trip Level 10% Off, 1 – 40% rated volts

Undervoltage Trip Level 10% Off, 1 – 40% rated volts

Over/Under Voltage Delay Time 1 Sec .1-90 Sec

Current Imbalance Trip Level 40% 5 - 40%

Controlled Fault Stop Off Off, On

Auto Fault Reset Delay Time 60 Off, 1 – 120 sec

CT Ratio 2640

Control Source Ter Terminal/Network

Modbus Address 2 1 - 247

Modbus Baud Rate 19.2 Kbps 1.2,2.4,4.8,9.6,19.2 kbps

Modbus Timeout 1 sec Off, 1 – 120 sec

Analog Output Function 1 1 - 11

Analog Output Span 100% 1 – 125%

Analog Output Offset 0% 0 – 99%

Passcode 0-9999

Fault Log Display faults

72,96,144,288,864,2640,2880,57

60,8000,14400,28800

IMM AGS-2

69

Component Location

Major Component Location

Figure 38, Unit Cutaway View

Power Panel

Control Panel

Filter-drier (2)

Electronic

Expansion

Valve (2)

Liquid Connection for Remote

Evaporators, Models AGS 120C – 175C

70

IMM AGS-2

Suction Connection for Remote Evaporators (2)

Chilled Water Inlet

Two-circuit DX Evaporator

Chilled Water Outlet

Figure 39, Piping Schematic, One of Two Circuits

SCHRADER

VALVE

SOLENOID

GLASS

EXPANSION

VALVE

WATER IN

WATER OUT

DX EVAPORATOR

SUCTION

SHUT-OFF

SUCTION

SCHRADER

330591001-PACKAGE

LIQUID

TUBING

LIQUID SHUT-OFF VALVE

CHARGING

VALVE

AIR

FLOW

SCHRADER

VALVE

AIR

FLOW

FILTER

CONDENSOR

ASSEMBLY

DRIER

VALVE

(HEADER)

DISCHARGE

AIR

FLOW

TUBING

VALVE

SCHRADER

VALVE

RELIEF

VALVE

FRAME 3200

COMPRESSOR

TUBING

RELIEF VALVE

VALVE (OPTIONAL)

CHARGING

VALVE

SIGHT

The above diagram illustrates one of the two circuits of an AGS chiller. The evaporator has two single-pass circuits with water passing over baffles on the shell side.

The vertical and slanted coils on one side of the unit comprise a condensing circuit. Models AGS 180C through 210C have an external economizer circuit consisting of a brazed-plate heat exchanger and expansion valve (not shown on the above diagram).

Figure 40, Compressor-mounted Components

Mechanical High

Pressure Cutout Switch

Compressor Relief Valve

Oil Heater

Optical Oil Level Sensor

IMM AGS-2

71

Control Transformer

Line

Reactors for

Optional

Fan VFDs

VFD Fuses

Fan Circuit

Breakers

Power Panel

The power panel is located on the front of the unit, to the right of the control panel.

Figure 41, Power Panel Components (Single Point Power)

Cir#2 Circuit Breaker,

Single Point Power Only

Primary Control Power Fuses

Cir#1 Circuit Breaker, Single Point Power Only

Unit Circuit Breaker (Optional)

Cir#2 Fan VFD

(Optional)

Cir#1 Fan VFD

(Optional)

Fan Contactors

Cir#2 Starter

Grounding Lug

Incoming Power Connection

Cir#1 Starter

72

IMM AGS-2

Control Panel

The control panel is located on the front of the unit, to the left of the power panel.

Distributed control architecture enhances unit reliability. Each compressor circuit has its own microprocessor controller so that if one circuit controller is inoperative, the other circuit controller will still be able to run its compressor and circuit components.

Figure 42, Control Panel Components

T2 T13 T14 T15 T23 T24 T25

T2 24V Unit Controller Transformer T13, T23 24V Circuit Controller Transformers T14, T24 24V Compressor Load/Unload Trns. T15, T25 24V EXV Driver Transformer

Transformers

Unit Controller

Cir#1 Controller

Cir#2 Controller

IMM AGS-2

73

Glass

System 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, and the compressor oil level sight glass. In addition, check the MicroTech II controller temperature and pressure readings with gauges and thermometers to see that the unit has normal condensing and suction pressure and superheat and subcooling readings. A recommended maintenance schedule is located at the end of this section.

A Periodic Maintenance Log is located at the end of this manual. It is suggested that the log be copied and a report be completed on a regular basis. The log will serve as a useful tool for a service technician in the event service is required.

Initial start-up date, vibration readings, compressor megger readings and oil analysis information should be kept for reference base-line data.

Compressor Maintenance

Since the compressor is semi-hermetic, no yearly compressor maintenance is normally required; however, vibration is an excellent check for proper mechanical operation. Compressor vibration contributes to a decrease in unit performance and efficiency and indicates that maintenance is required. It is recommended that the compressor be checked with a vibration analyzer at, or shortly after, start-up and again on an annual basis. The load should be maintained as closely as possible to the load of the original test and only one compressor should be running at a time. The initial vibration analyzer test provides a benchmark of the compressor and, when performed routinely, can give a warning of impending problems.

Lubrication

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

Figure 43, Compressor Oil Filter

Compressor oil must be ICI RL68HB, McQuay Part Number 735030446 in a 1-gallon container. This is synthetic polyolester oil with anti-wear additives and is highly hygroscopic. Care must be taken to minimize exposure of the oil to air when charging oil into the system.

The oil filter resides in the compressor

Oil Sight

The top of the oil level should be visible in the sight glass. If the glass is completely filled with oil at all times, the circuit is overcharged with oil. If only refrigerant is visible in the glass, the circuit has insufficient oil.

A mechanical oil pressure differential switch is mounted on the unit frame adjacent to each compressor and will shut down the compressor at a differential pressure greater than 25 psi.

Oil Filter

Housing

housing as shown in Figure 43. Units without a suction service shutoff valve require pumping down the circuit in order to change the filter.

74

IMM AGS-2

The switch has automatic reset but is locked out by the MicroTech II control, which must be reset through the software. A gauge can be put across the switch to actually measure the pressure drop. The normal pressure drop is 5 to 6 psi. Change the filter at 15 psi.

Electrical Terminals

DANGER

Electric equipment can cause electric shock with a risk of severe personal injury or

death. Turn off, lock out and tag all power before continuing with following service.

Panels can have more than one power source.

CAUTION

Periodically check electrical terminals for tightness and tighten as required. Always

use a back-up wrench when tightening electrical terminals.

Condensers

The condensers are air-cooled and constructed of 3/8" (9.5mm) OD internally finned copper tubes bonded in a staggered pattern into louvered aluminum fins. No maintenance is ordinarily required except the routine removal of dirt and debris from the outside surface of the fins. McQuay recommends the use of non-caustic, non-acidic, foaming coil cleaners available at most air conditioning supply outlets. Flush the coil from the inside out.

WARNING

Use caution when applying coil cleaners. They can contain potentially harmful

chemicals. Wear breathing apparatus and protective clothing. Thoroughly rinse all

surfaces to remove any cleaner residue. Do not damage the fins during cleaning.

If the service technician has reason to believe that the refrigerant circuit contains noncondensables, recovery of the noncondensables will be required, strictly following Clean Air Act regulations governing refrigerant discharge to the atmosphere. The service Schrader valves are located on both vertical coil headers on both sides of the unit at the control box end of the coil. Access panels are located at the end of the condenser coil directly behind the control panel. Recover the noncondensables with the unit off, after 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.

Liquid Line Sight Glass

Observe the refrigerant sight glasses (one per circuit) weekly. A clear glass of liquid indicates that there is adequate refrigerant charge in the system to provide proper feed through the expansion valve. Bubbling refrigerant in the liquid line sight glass, during stable run conditions, may indicate that there can be an electronic expansion valve (EXV) problem since the EXV regulates liquid subcooling. 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 page 25 for maximum allowable pressure drops).

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. An oil acid test is also recommended.

IMM AGS-2

75

Do not use the sight glass on the EXV body for refrigerant charging. Its purpose is to view

Visually inspect unit for loose or damaged components and

the position of the valve.

Lead-Lag

A feature on all McQuay AGS air-cooled chillers is a system for alternating the sequence in which the compressors start to balance the number of starts and run hours. Lead-Lag of the refrigerant circuits is accomplished automatically through the MicroTech II controller. When in the auto mode, the circuit with the fewest number of starts will be started first. If all circuits are operating and a stage down in the number of operating compressors is required, the circuit with the most operating hours will cycle off first. The operator can override the MicroTech II controller, and manually select the lead circuit as circuit #1 or #2.

Preventative Maintenance Schedule

PREVENTATIVE MAINTENANCE SCHEDULE

OPERATION WEEKLY

General Complete unit log and review (Note 3) X

MONTHLY

(Note 1)

ANNUAL

(Note 2)

visible leaks Inspect thermal insulation for integrity X Clean and paint as required X

Electrical Sequence test controls X Check contactors for pitting, replace as required X Check terminals for tightness, tighten as necessary X Clean control panel interior X Clean control box fan filter (Note 7) X Visually inspect components for signs of overheating X Verify compressor and oil heater operation X Megger compressor motor X

Refrigeration/Oil Leak test X Check liquid line sight glasses for clear flow X Check compressor oil sight glass for correct level (oil charge) X Check filter-drier pressure drop (see manual for spec) X Check oil filter pressure drop (Note 6) X Perform compressor vibration test X Perform oil analysis test on compressor oil 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, check motor brackets X Check coil fins for damage and straighten as necessary X

X

Notes:

1. Monthly operations include all weekly operations.

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

3. Log readings can be taken daily for a higher level of unit observation.

76

IMM AGS-2

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.

6. Replace the filter if pressure drop exceeds 20 psi.

7. The weekly fan filter cleaning schedule can be modified to meet job conditions. It is important

that the filter allows full air flow.

Warranty Statement

Limited Warranty

McQuay’s written Limited Product Warranty, along with any extended warranty expressly purchased is the only warranty. Consult your local McQuay Representative for warranty details. Refer to Form 430285Y. To find your local McQuay Representative, go to www.mcquay.com.

Service

CAUTION

1. Service on this equipment must be performed by trained, experienced

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 corrected.

2. Anyone servicing this equipment must comply with EPA requirements regarding

refrigerant reclamation and venting.

DANGER

Disconnect all power before doing any service inside the unit to avoid bodily injury or

death. MULTIPLE POWER SOURCES CAN FEED THE UNIT.

Liquid Line Filter-Driers

Replace the filter-drier cores any time excessive pressure drop is read across the filter-drier and/or when bubbles occur in the sight glass with normal subcooling. There is one, twocore drier in each circuit. Models AGS 180 to 210 have economizers that incorporate an additional filter-drier that should also be checked. The maximum recommended pressure drop across the filter-drier is 7 psi at full load.

The filter-driers should also be changed if the moisture indicating liquid line sight glass indicates excess moisture in the system, or an oil test indicates the presence of acid.

High acid cores may be used temporarily, but replaced after two day use.

IMM AGS-2

77

The following is the procedure for changing the filter-drier core:

The standard unit pumpdown is set to stop pumpdown when 20 psig (138 kPa) suction pressure is reached. To fully pump down a circuit beyond 20 psig (138 kPa) for service purposes, a "Full Pumpdown" service mode can be activated using the keypad.

With Full Pumpdown = Yes, then the next time the circuit is pumped down, the pumpdown will continue until the evaporator pressure reaches 15 psig (103 kPa) or 120 seconds have elapsed, whichever occurs first. Upon completing the pumpdown, the "FullPumpDwn" setpoint is automatically changed back to "No".

The procedure to perform a full service pumpdown for changing the filter-drier core is as follows:

1. Under the "Alarm Spts", change the "FullPumpDwn" setpoint from "No" to "Yes".

2. Move the circuit switch to the OFF position. The compressor will unload to minimum

slide position and the unit will pump down.

3. Upon completing the full pumpdown per step 3, the "FullPumpDwn" setpoint is

automatically changed back to "No" which reverts back to standard 20 psig (138 kPa) pumpdown stop pressure.

4. If the pumpdown does not go to 15 psig (103 kPa) on the first attempt, one more

attempt can be made by repeating the above steps. Do not repeat "FullPumpDwn" more than once to avoid excessive screw temperature rise under this abnormal condition.

5. The circuit is now in the deepest pumpdown that can be achieved by the use of the

compressor. Close the two liquid line shutoff valves upstream of the filter-drier, on the circuit to be serviced plus the optional suction shutoff valve. Manually open the EXV, then remove the remaining refrigerant from the evaporator by the use of a refrigerant recovery unit.

6. Loosen the cover bolts, remove the cap and replace the filters.

7. Evacuate and open valves.

Evacuate the lines through the liquid line manual shutoff valve(s) to remove noncondensables that could have entered during filter replacement. Perform a leak check before returning the unit to operation.

Compressor Slide Valves

The slide valves used for unloading the compressor are hydraulically actuated by pulses from the load/unload solenoid as controlled by the circuit controller. See OM AGS for details on the operation.

Electronic Expansion Valve (EXV)

The electronic expansion valve is located in each circuit’s liquid line entering the evaporator.

The expansion valve meters the amount of refrigerant entering the evaporator to match the cooling load. It does this by maintaining constant suction superheat. (Superheat is the difference between the actual refrigerant temperature of the gas as it leaves the evaporator and the saturation temperature corresponding to the evaporating pressure.) The EXV logic controls the superheat between 4°F at 0% slide position and 8°F at 100% slide position.

The position of the valve can be viewed at any time by using the MicroTech II controller keypad through the View Refrigerant menus. There are 6386 steps between closed and full open. There is also a sight glass on the EXV to observe valve movement and to check if it is open or closed visually.

78

IMM AGS-2

Evaporator

The evaporator is a two-circuit, direct expansion, shell-and-tube type with water flowing through the shell and refrigerant flowing in one pass through the tubes. The tubes are internally enhanced to provide extended heat transfer surface. Normally, no service work is required on the evaporator other than cleaning the water side in the event of improper water treatment or contamination.

Charging Refrigerant

Note:

It is a good idea to record the normal values of refrigerant pressures, subcooling, superheat, and evaporator and condenser approach temperatures during startup by the McQuay service technician. This makes it easier to spot errant unit behavior.

Indications of a low refrigerant R-134a charge:

• Condenser subcoolong approaching 0 degrees F.

• Suction superheat higher than 10 to 12 degrees F.

• Bubbles in the sight glass.

Indications of a high refrigerant R-134a charge:

• Condenser pressure is abnormally high.

• Subcooling is abnormally high. Take note of the subcooling on the unit at startup and

use this value as a benchmark.

• EXV is at minimum position and discharge superheat is low (below 22 degrees F). The

circuit controller View Refrigerant Screen #7 displays the valve position and the valve range. The minimum position occurs when the valve position value remains at the lower limit of the range displayed.

AGS air-cooled screw compressor chillers are shipped factory-charged with a full operating charge of refrigerant; but there can be times when 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 beginning on page 26 for packaged units and page 60 for remote evaporator units. An initial charge of 80% to 90% of the nameplate is assumed. Unit charge adjustment should be done at 100% load, at normal cooling outdoor temperature (preferably higher than 75°F (24°C), and with all fans on. Unit must be allowed to run 15 minutes or longer so that the condenser fan staging and load is stabilized at normal operating discharge pressure. For best results, charge with condenser pressure at design conditions.

Each circuit of the evaporator has a sight glass located in the liquid line. If the unit can be run at close to ARI conditions (95°F ambient temperature and 44°F chilled water), there should be no bubbles in the sight glass, but this does not necessarily mean that the unit is correctly charged. Charge until the superheat and subcooling temperatures are within range. The discharge superheat should be above 22 degrees F.

Procedure to charge an undercharged AGS unit:

1. If a unit is low on refrigerant, 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. Do not use oil/refrigerant detection additives.

2. Add the charge to the system only through the evaporator charging valve.

3. The charge must be added at the 100% slide valve position and above conditions.

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4. Add sufficient charge to clear the conditions listed above under “Indications of a low

refrigerant R-134a charge”.

5. Overcharging of refrigerant will raise the condenser pressure and increase the

condenser subcooling.

Standard Controls

NOTE: A complete explanation of the MicroTech II controller and unit operation is contained

in the Operation Manual OM AGS.

Thermistor sensors

Evaporator leaving water temperature - This sensor is located on the evaporator water outlet connection and is used for capacity control of the chiller and low water temperature freeze protection.

Evaporator entering water temperature - This sensor is located on the evaporator water inlet connection and is used for monitoring purposes and return water temperature reset control.

Evaporator pressure transducer circuit #1, 2 - This sensor is located on the suction side of the compressor (evaporator outlet) and is used to determine saturated suction refrigerant pressure and temperature. It also provides low pressure freeze protection.

Condenser pressure transducer circuit #1, 2 - the sensor is located in the discharge line and is used to read discharge pressure and saturated refrigerant temperature (calculated). The transducer will signal the controller to hold load or unload the compressor if a rise in head pressure occurs which is outside the MicroTech II controller setpoint limits. The signal is also used in the calculation of discharge superheat.

Liquid pressure transducer #1, 2 – located on the liquid line ahead of the EXV. It is used to determine liquid pressure and subcooling and is used to control the EXV.

Outside air - This sensor is located on the back of the control box. It measures the outside air temperature, is used to determine if low ambient start logic is necessary, and can be the reference for low ambient temperature lockout.

Suction temperature circuit #1, 2 - The sensor is located in a well on the suction line. The purpose of the sensor is to measure refrigerant temperature and superheat.

Discharge line temperature circuit #1, 2 - The sensor is located in a well on the discharge line. It measures the refrigerant temperature and is used to calculate discharge superheat.

Demand limit - This requires a field connection of a 4-20 milliamp DC signal from an external source such as a building automation system. It will determine the maximum number of cooling stages that can be energized.

Evaporator water temperature reset - This requires a 4-20 milliamp DC signal from a building automation system or temperature transmitter to reset the leaving chilled water setpoint.

High condenser pressure control

MicroTech II control is equipped with high pressure transducers on each refrigerant circuit. The main purpose of the high pressure transducer is to maintain proper head pressure control. It also sends a signal to the MicroTech II control to unload the compressor in the event of an excessive rise in discharge pressure to 275 psig (1896 kPa). Also, MicroTech II control will inhibit additional circuit loading at 267 psig (1841 kPa). The high pressure switch trip setting is 282 psig (1944 kPa). The high pressure alarm is in response to the signal sent by the pressure transducer.

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Mechanical high pressure equipment protection control

The high pressure equipment protection control is a single pole, pressure-activated switch that opens on a pressure rise. When the switch opens, the control circuit is de-energized, dropping power to the compressor and fan motor contactors. The switch is factory set (nonadjustable) to open at 310 psig (2137 kPa) ±7 psig and reclose at 200 psig (1379 kPa) ±7 psig. Although the high pressure switch will close again at 200 psig (1379 kPa), the control circuit will remain locked out and it must be reset through the MicroTech II control.

The control is mounted on the rear of the compressor. See page 71.

Compressor motor protection

The compressors are supplied with two types of motor protection. Solid state electronic overloads mounted in the control box sense motor current to within 2% of the operating amps. The MUST TRIP amps are equal to 140% of unit nameplate compressor RLA. The MUST HOLD amps are equal to 125% of unit nameplate RLA. A trip of these overloads can result from the unit operating outside of normal conditions. Repeat overload trips under normal operation can indicate wiring or compressor motor problems. The overloads are manual reset and must be reset at the overload, as well as through the MicroTech II controller.

The compressors also have a solid state Guardister circuit that provides motor over temperature protection. The Guardister circuit has automatic reset and gives a Starter Fault (F75) that is cleared through the starter display and must also be reset through the MicroTech II control.

Head pressure control (standard)

The MicroTech II controller automatically cycles the condenser fans in response to condenser pressure. Each fan in a circuit is cycled independently for 4, 5 or 6 steps per circuit, depending on the unit size. This maintains head pressure and allows the unit to run at ambient air temperatures down to 35°F (1.7°C). The settings are adjustable through the controller.

Each fan added has a decreasing percentage effect, so the control pressure band is smaller when more fans are on and largest with only one or two fans on.

Unit operation with the standard control is satisfactory down to outdoor temperatures of 35°F (-1.7°C). Below this temperature, the VFD option is required to regulate the speed of the first fan on the circuit to adequately control the discharge pressure. The VFD option allows unit operation to 0°F (-17.8°C) outdoor temperature, assuming no greater than 5mph wind.

Head pressure control (optional low ambient)

The optional low ambient control includes a variable frequency drive (VFD) on the first fan on each circuit. The remaining fans cycle based on discharge pressure. This control must be used for operation in ambient temperatures below 35°F (1.7°C) down to 0°F (-17.8°C).

NOTE

: VFD and standard fan cycling will provide proper operating refrigerant discharge pressures at the ambient temperatures listed for them, provided the coil is not affected by the existence of wind. Louvers must be utilized for low ambient operation if the unit is subjected to winds greater than 5 mph.

Compressor short cycling protection

The MicroTech II controller contains logic to prevent rapid compressor restarting. Excessive compressor starts can be hard on starting components and create excessive motor winding temperatures. The anti-cycle timers are set for a five-minute stop-to-start cycle and a 20-minute start-to-start cycle. Both are adjustable through the MicroTech II control.

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Controls, Settings and Functions

Table 44, Controls

DESCRIPTION FUNCTION SYMBOL SETTING RESET LOCATION

Compressor

Heaters

Compressor

Solenoid - Load

Compressor

Solenoid - Unload

Evaporator Heaters Help prevent evaporator freeze-up HTR-EVAP 38oF (3.3oC) N/A Evap. Barrel

Electronic

Expansion

Valve Board

Electronic

Expansion

Valve

Solid State Starter

Thermistor Card

Mechanical High

High Pressure

Switch

MicroTech II Unit

Controller

MicroTech II Circuit

Controllers

Oil Level Sensor Senses oil level in compressor OLS

Fan VFD (Optional) Controls discharge pressure FAN VFD In controller code N/A Power Panel

Control Panel

Heater

Lightning Arrestor

High Oil Delta-P

Switch

To provide heat to drive off liquid

refrigerant when compressor is off.

Loads compressor LOAD N/A N/A

Unloads the compressor UNLOAD N/A N/A

To provide power and step control to the

EXV stepper motors commanded by the

MT II.

To provide efficient unit refrigerant flow

and control subcooling.

To provide motor temperature protection

at about 220oF (104oC).

For UL, ETL, etc., safety code to prevent

high pressure above the relief valve.

To control unit functions. Refer to OM

AGS.

To control individual circuit functions.

One per circuit. Refer to OM AGS.

Maintain controller operation

To protect from high voltage spikes and

surges.

Protects compressor from running with

insufficient oil pressure

HTR1-COMPR

EXV-DRIVER N/A N/A Control Panel

EXV

K2 Fault

MHPR

UNIT

CONTROLLER

CIRCUIT

CONTROLLER

HTR-

CONTROL BOX

LA N/A N/A Power Panel

LPS Refer to OM AGS Auto

On, when

compressor is off.

In Controller

Code

None,

Inherent in design

Refer to

OM AGS

N/A

NC with oil

present

On at 40°F N/A Control Panel

N/A

Auto Power Panel

Auto Control Panel

Refer to

OM AGS

Refer to

OM AGS

N/A

On the

Compressor

On the

Compressor

On the

Compressor

In Main Liquid

Line

Control Panel

On

compressor

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Troubleshooting Chart

Table 45, Troubleshooting

PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS

Compressor will not run.

Compressor Noisy or Vibrating

Compressor Overload K2 Tripped or Circuit Breaker Trip or Fuses Blown

Compressor Will Not Load or Unload

High Discharge Pressure

Low Discharge Pressure

Low Suction Pressure

Low Oil Level Trip

High Suction Pressure

1. Main power switch open.

2. Unit S1 system switch open.

3. Circuit switch, CS in pumpdown position.

4. Chilled water flow switch not closed.

5. Circuit breakers open.

6. Fuse blown or circuit breakers tripped.

7. Compressor overload tripped.

8. Defective compressor contactor or contactor coil.

9. System shut down by protection devices.

10. No cooling required.

11. Motor electrical trouble.

12. Loose wiring.

1. Compressor Internal problem.

2. Oil injection not adequate.

1. Low voltage during high load condition.

2. Loose power wiring.

3. Power line fault causing unbalanced voltage.

4. Defective or grounded wiring in the motor.

5. High discharge pressure.

1. Defective capacity control solenoids.

2. Unloader mechanism defective.

1. Noncondensables in the system.

2. Fans not running.

3. Fan control out of adjustment.

4. System overcharged with refrigerant.

5. Dirty condenser coil.

6. Air recirculation from fan outlet into unit coils.

7. Air restriction into unit.

1. W ind effect or a low ambient temperature.

2. Condenser fan control not correct.

3. Low suction pressure.

4. Compressor operating unloaded.

1. Inadequate refrigerant charge quantity.

2. Clogged liquid line filter-drier.

3. Expansion valve malfunctioning.

4. Insufficient water flow to evaporator.

5. W ater temperature leaving evaporator is too low.

6. Evaporator tubes fouled.

7. Suction valve (partially) closed.

8. Glycol in chilled water system

1. Insufficient oil.

2. Low discharge pressure.

1. Excessive load - high water temperature.

2. Compressor unloaders not loading compressor.

3. Superheat is too low.

4. System overcharged

1. Close switch.

2. Check unit status on MicroTech II display. Close switch.

3. Check circuit status on MicroTech II display. Close switch. Check pump operation for flow.

4. Check unit status on MicroTech display. Close switch.

5. Close circuit breakers.

6. Check electrical circuits and motor windings for shorts or grounds. Investigate for possible overloading. Check for loose or corroded connections. Reset breakers or replace fuses after fault is corrected.

7. Overloads are manual reset. Reset overload at button on overload. Clear alarm on MicroTech II display.

8. Check wiring. Repair or replace contactor.

9. Determine type and cause of shutdown and correct problem before attempting to restart.

10. Check control settings. Wait until unit calls for cooling.

11. See 6,7,8 above.

12. Check circuits for voltage at required points. Tighten all power wiring terminals.

1. Contact McQuayService.

2. Check that oil sight glass has oil visible during steady operation Check pressure drop across oil filter and oil separator sight glasses

1. Check supply voltage for excessive voltage drop.

2. Check and tighten all connections.

3. Check supply voltage.

4. Check motor and replace if defective.

5. See corrective steps for high discharge pressure.

1. Check solenoids for proper operation. See capacity control section.

2. Contact McQuayService .

1. Remove noncondensables from the condenser coil after shutdown per EPA regulations.

2. Check fan fuses and electrical circuits.

3. Check that fan setup in the controller matches unit fan number. Check MicroTech II condenser pressure sensor for proper operation.

4. Check discharge superheat and condenser subcooling. Remove the excess charge.

5. Clean the condenser coil.

6. Remove the cause of recirculation.

7. Remove obstructions near unit.

1. Protect unit against excessive wind into vertical coils.

2. Check that fan setup in the MicroTech II controller matches unit fan number. Check VFD fan on units with VFD option.

3. See corrective steps for low suction pressure.

4. See corrective steps for failure to load.

1. Check liquid line sight glass. Check unit for leaks. Repair and recharge to clear sight glass at full load, all fans on, 75°F min OAT..

2. Check pressure drop across the filter-drier. Replace filter-driers.

3. Check expansion valve superheat and valve opening position. Replace valve only if certain valve is not working.

4. Check water pressure drop across the evaporator and adjust gpm.

5. Adjust water temperature to higher value.

6. Inspect by removing water piping. Clean chemically.

7. Open valve.

8. Check glycol concentration

1. Check oil line and separator sight glasses.

2. Faulty EXV.

1. Reduce load or add additional equipment.

2. See corrective steps below for failure of compressor to load.

3. Check superheat on MicroTech II display. Check suction line sensor installation and sensor.

4. Check charge, an overcharge raises suction pressure

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Periodic Maintenance Log

Date of inspection: Address:

Facility/job name: City/State:

Unit model number: Physical location of unit:

Unit serial number: Service technical (name):

Software identification:

Operating hours: Compressor #1 Compressor #2

Number of starts Compressor #1 Compressor #2

Follow up service required: Yes No

General Actions to be Taken

Upper part of report completed: Yes No Fill in above Compressor operation: Yes No Explain all “No” checks

1. Mechanical operation acceptable (noise, vibration, etc.)?

2. Look at cycling and cooling, is unit controlling at set points?

3. No refrigerant leaks (full liquid sight glass)?

4. Liquid line moisture indicator shows dry system?

5. Proper condensing fan operation?

6. Condenser coil clean?

7. No corrosion or paint problems?

Compressor electrical operation:

8. Satisfactory electrical operation?

9. MicroTech II hardware operation satisfactory?

10.

MicroTech II software operation satisfactory?

11. Unit status %

Data from MicroTech II Controller:

12. Circuit status 1 % Capacity Circuit status 2 % Capacity

13. Water temperature – Evaporator: Entering/Leaving /

Circuit #1 Circuit #2

14. No. of fan states active:

15. Evaporator pressure:

16. Condenser pressure:

17. EXV position – Steps open or percent open:

18. Superheat:

19. Subcooling:

20. Liquid line temperature:

21. Outside air temperature:

22. Leaving evaporator setpoint temperature:

23. Reset option programmed? Yes No Ice storage unit? Yes No

24. Is VFD included? Yes No VFD operation OK? Yes No

25. Current alarm: ___ ___ ___ Circuit #1 ______ Circuit #2 ______

26. Previous alarm – Show all: Alarm Type Date

Circuit #1

Circuit #2

27. Compressor starts See note 1 Circuit #1 _________________

Circuit #2 _________________

28. Compressor run hours Circuit #1 _________________

Circuit #2 _________________

Data at Job Site:

29. Volts: L1_____ L2_____ L3_____

30. Amps: Comp #1 Ph 1____ PH 2____ PH 3____

31. Amps: Comp #2 PH 1____ PH 2____ PH 3____

32. Vibration – Read every six months using IRD (or equal) unfiltered at flat on top of motor end: ______ In/Sec Comp #1

______ In/Sec Comp #2

NOTE 1: If the number of starts exceeds the number of run hours, the unit is short cycling. This must be corrected as it can reduce compressor life.

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IMM AGS-2

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

(800) 432-1342 • www.mcquay.com IMM AGS-2 (07/08)

McQuay AGS120CS, AGS 210CS/H, AGS120CH, AGS210CS, AGS210CH Installation And Maintenance Manual

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