McQuay ACZ 010BS User Manual

Catalog

Air-Cooled, Scroll Compressor Units

ACZ 010BS – ACZ 039BS, Condensing Units AGZ 010BS – AGZ 034BS Chillers AGZ 010BM – AGZ 034BM Chillers with Remote Evaporators

10 to 40 Tons, (35 to 140 kW) 60 Hertz R-22, R-407C

CA T ACZ-AGZB1-1

Engineered for flexibility and performance. 

Table of Contents

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

Features and Benefits ..............................................................4

Design Features........................................................................5

ACZ Condensing Unit Performance....................................11

AGZ Chiller Selection Procedure.........................................17

AGZ Chiller Performance Data ...........................................

Pressure Drop Curves............................................................

Sound Data .............................................................................29

Electrical Data........................................................................

Physical Data..........................................................................

Dimensions & Weights...........................................................48

Application Data....................................................................53

Optional Features...................................................................58

Product Specification.............................................................60

Manufactured in an ISO certified facilit

Document Number: Catalog ACZ-AGZB1-1 Initial Issue: October 2007 Revision Date: May, 2008 Replaces: CA T ACZ-4, CA T AGZ-7,

Catalog ACZ-AGZB1

©2007 McQuay International. Illustrations and data cover the McQuay International product at the time of publication and we reserve the right to make changes in design and construction at anytime without notice. ™® The following are trademarks or registered trademarks of their respective companies: BACnet from ASHRAE; logo are managed, granted and used by L from Copeland Corporation; ElectroFin from AST ElectroFin Inc.; Modbus from Schneider Electric; FanTrol, MicroTech II, Open Choices, and SpeedTrol from McQuay International.

2 Catalog ACZ-AGZB1-1

ONMARK International under a license granted by Echelon Corporation; Compliant Scroll

LONMARK, LonTalk, LONWORKS, and the LONMARK

Introduction

This catalog covers air-cooled, single circuit, R-22 (R-407C optionally available), scroll compressor chillers and condensing units as follows:

 ACZ 010BS – ACZ 039BS condensing units, 10 to 39 tons  AGZ 010BS – AGZ 034BS packaged chillers, 10 to 34 tons  AGZ 010BM – AGZ 034BM chiller with remote, 10 to 34 tons, matching water cooler, shipped

separately for field installation, usually indoors These units utilize a single refrigerant circuit using a set of tandem scroll compressors. They continue McQuay’s legacy of high quality, high efficiency, latest technology and quiet operation. These features make the ACZ and AGZ the best overall value in air-cooled units available today.

Efficient Operation

The ACZ and AGZ units utilize R22 (or R-407C, optionally) and meet the efficiency requirements of ASHRAE Standard 90.1 where applicable.

Latest Control Technology

These units have the latest control technology through utilization of McQuay’s MicroTech II microprocessor. Integrating with your building automation system is easy with the McQuay’s Open Choices feature using L the addition of a small communication module to the unit controller.

Compact Size

Our reputation for compact designs with small footprints to minimize space requirements continues to be a primary feature.

ONMARK, BACnet or Modbus network communication, requiring only

Quiet Operation

The ACZ and AGZ units further enhance McQuay’s reputation for low operating sound levels to make these units “neighborhood friendly”.

NOMENCLATURE

A C Z 010 B S

C = Condensing Unit

Scroll Compressor Nominal Capacity (Tons)

Air-cooled

G = Chiller

S = Standard Unit M = Remote Eva

Vintage

orator

Catalog ACZ-AGZB1-1

Features and Benefits

ACZ-AGZ, Single Circuit Units

Great values also come in small packages. The ACZ and AGZ units have a single refrigerant circuit with capacities from 10 to over 34 tons. Customer benefits include high efficiency operation, low sound levels, efficient and reliable scroll compressor technology, and MicroTech II controls.

High Efficiency Operation

These units operate at high efficiency with IPLVs up to 14.6 EER. Through the use of tandem scroll compressors and the latest control technology, excellent part load performance occurs. With a single compressor running, the entire unit’s condenser surface is utilized, lowering condenser pressure and reducing power input.

Quiet Operation

ACZ and AGZ units have low sound ratings through the use of scroll compressors. These compressors are housed in a sheet metal enclosure to further reduce the levels. All units have a sound power rating of 90 dBA or less. For additional sound attenuation, optional acoustic blankets are also available. See page for more information regarding our low sound levels.

Superior Control with MicroTech II

They have the MicroTech II controller providing control strategies expected of much larger units.

Building Automation System Integration

The MicroTech II controller allows for easy BAS integration through our Open Choice feature using

ONMARK, BACnet or Modbus communications. This is another advanced feature typical of larger units.

Figure 1, Model ACZ 033, 30-ton Condensing Unit

4 Catalog ACZ-AGZB1-1

Design Features

The McQuay air-cooled, scroll compressor units are a product of the McQuay commitment to offer quiet, reliable, energy efficient equipment. These units incorporate high quality compressors, state-ofthe-art coil design, and innovative packaging.

Construction

Factory assembled and mounted on a heavy-gauge steel channel base. The base rails, supports and cabinetry are powder-coat painted. The base distributes the unit weight for roof loading. Varied and convenient installation is possible by virtue of the unit's small footprint.

Compressors

Copeland’s Compliant Scroll tandem compressors are used. These rugged hermetic compressors are constructed with an integral cast iron frame, cast iron scrolls, three Teflon impregnated bearings, and three oil filtration devices for each compressor.

Using Copeland's Compliant Scroll tandem compressors provides two steps of capacity modulation. One compressor can run alone, depending on the load of the system, utilizing the entire unit’s condenser surface, which results in excellent part-load efficiency. The refrigerant circuit has specially designed oil and gas equalization lines to control oil migration.

The design also offers radial and axial compliance (no tip seals), a large internal volume for liquid handling, a removable suction screen, and a rotary dirt trap and oil screen. In addition, the compressor is self-compensating for wear, handles liquid and debris, and inherently yields the highest efficiency for its class.

This well protected compressor includes a solid-state motor protection module, 4 individual motor-winding sensors, a patented internal discharge temperature probe, and a patented shutdown feature that prevents reverse rotation. An internal discharge check valve helps prevent shutdown noise and comes standard with high and low pressure taps with Schrader valves, a sight glass, an oil level adjustment valve, and an off cycle crankcase heater.

Units are available in 60 Hertz electrical voltage configurations from 208 to 575 volt operating at 3500 rpm.

Condenser Coils

Condenser coils have internally enhanced seamless copper tubes arranged in a staggered row pattern. The coils are mechanically expanded into McQuay lanced and rippled aluminum fins with full fin collars. A variety of optional coil material and coatings are available for corrosive atmospheres. The external condenser coils are fitted with a protective wire mesh guard as standard equipment.

Condenser Fans and Motors

Multiple direct-drive, dynamically balanced, propeller fans operate in formed venturi openings at low tip speeds for maximum efficiency and minimum noise and vibration. A heavy-gauge vinyl-coated fan guard protects each fan.

Each condenser fan motor is heavy-duty, 3-phase, Totally Enclosed Air Over (TEAO) with permanently lubricated ball bearings and inherent overload protection. SpeedTrol option includes a single-phase motor with fan speed control on the lead fan.

Evaporator

Stainless steel, brazed plate evaporators are used on the AGZ units. They have counter-flow operation and very high efficiencies.

Catalog ACZ-AGZB1-1

Electrical Control Center

Operating and equipment protection controls and motor starting components are separately housed in a centrally located, weather-resistant control panel with hinged and tool-locked doors. In addition to the MicroTech II controller described in the next sections, the following components are housed in the panel:

 Standard single-point, terminal block connection  Control, input, and output terminal block  Control transformer  Phase voltage monitor with under/over voltage and phase reversal protection  Fan contactors with short circuit protective devices  The standard FanTrol head pressure control system controls refrigerant discharge pressure by fan

staging. The FanTrol system cycles condenser fans based on discharge pressure and outdoor temperature and is designed for operation down to 35°F (1.7°C).

 Optional SpeedTrol™ control using both fan cycling and fan speed control on the lead fan per circuit and allows operation to 0°F (-18°C) outdoor temperature.

 Mechanical high pressure cutout  Power connections are per following table:

Power Connection

ACZ 010-039, Single-Point Connection Std. Opt Not Avail. Opt. Opt. AGZ 010-034 Single Point Connection Std. Opt Not Avail. Opt. Opt.

Power

Block

Disc.

Swt.

Comp. Circuit

Breakers

Definitions:

1. Power Block: An electrical device to directly accept field wiring without any disconnecting means.

2. Disconnect Switch: A molded case switch that accepts field wiring and disconnects main power to the

entire unit or each main power supply if the multi-point power supply option is selected. This option does not provide overcurrent protection.

3. Unit Circuit Breaker with High Interrupting Capacity: A molded case circuit breaker acting as the

main disconnect switch with short circuit current rating (formally known as “withstand”). One circuit breaker is provided. The circuit breaker provides overcurrent protection for the power supply.

4. Control Panel High Short Circuit Current Rating: (Previously known as “withstand rating”). The

entire control panel is designed for short circuit current rating. In the event of a short circuit, the damage is contained within the control panel enclosure.

High Interr

Disconnect Switch

Current Rating

High Short Circuit

Current Rating w/

Disconnect Switch

Control System

The MicroTech II advanced DDC unit controller surpasses all other microprocessor-based unit control systems available today on this class of equipment. This powerful, user-friendly control system provides the flexibility and performance needed for either stand-alone unit operation or the controller can be easily tied into your building automation system of choice using McQuay’s exclusive Open Choices feature that allows you to choose from open standard protocols such as BACnet, Modbus, and L communicate easily with the building automation system that best meets your facility requirements. These optional communications modules are available factory-installed or can be easily field installed.

MicroTech II’s state-of-the-art design will not only permit the unit to run more efficiently, but will also simplify troubleshooting if a system failure occurs. Every MicroTech II controller is programmed and tested prior to shipment.

Operator-friendly

The MicroTech II control menu structure is separated into four distinct categories that provide the operator or service technician with a full description of current unit status, control parameters, and alarms. Security protection helps prevent unauthorized changing of the setpoints and control parameters.

MicroTech II continuously performs self-diagnostic checks, pressures and protection devices, monitoring system temperatures, and it will automatically shutdown a compressor, or the entire unit, if a fault occurs. The

6 Catalog ACZ-AGZB1-1

onTalk to

cause of the shutdown will be retained in memory and can be easily displayed in English or metric units for operator review.

The MicroTech II unit controller can also retain and display the time that the fault occurred and the operating conditions that were present at the time of the fault, an extremely useful feature for troubleshooting. In addition to displaying alarm diagnostics, the MicroTech II controller also provides the operator with a warning of pre-alarm conditions. Alarm notification data can also be passed on to your BAS through an optional communications module.

Staging

On ACZ condensing units, temperature control for the system is provided by the installer through a field supplied temperature controller. The field-supplied staging signals are provided to the MicroTech II controller which correspondingly activates and deactivates the scroll compressors. The temperature controller is required to close normally-open 24 volt contacts on a demand for cooling. These closure signals are field wired to the terminal strip (TB2) in the condensing unit. Refer to the typical field wiring diagram on page for details. Two control stages are required:

Lead/lag is automatic and switched based on operating hours and compressor starts.

Equipment Protection

The unit is protected in two ways: (1) by alarms that shut the unit down and require manual reset to restore unit operation and (2) by limit alarms that reduce unit operation in response to some out-of-limit condition. Shut down alarms can activate a remote alarm signal. Limit alarms activate a signal on the controller.

Shutdown Alarms

 High condenser pressure  No chilled water flow  Motor protection system  Phase voltage protection (Optional on ACZ-B and AGZ-B)  Outside ambient temperature  Sensor failures

Limit Alarms

 Condenser pressure stage down, unloads unit at high discharge pressures  Low ambient lockout, shuts off unit at low ambient temperatures  Low evaporator pressure hold, holds stage #1 until pressure rises  Low evaporator pressure unload, shuts off stage #2

Unit Enable Selection

 Enables unit operation from either local keypad, digital input, or BAS

Unit Mode Selection

 Selects standard cooling, or test operation mode

Digital Inputs

 Unit off switch  Remote start/stop  Flow switch

Digital Outputs

 Shutdown alarm; field wired, activates on an alarm condition, off when alarm is cleared  Evaporator pump or air handler fan motor; field wired, starts when unit is set to start

Catalog ACZ-AGZB1-1

Condenser fan control

The MicroTech II controller provides control of condenser fans. The controller stages condenser fans based on discharge pressure.

Building Automation System (BAS) Interface

The following BAS standard protocols are supported through McQuay’s Open Choices option:

 BACnet/IP  BACnet MS/TP  BACnet Ethernet  L

onTalk 

 Modbus

The following functions are generally available depending on the application and protocol in use:

 Enable/disable operation  Select operating mode  Set the network limit variable  Read all digital and analog inputs and outputs  Read operating mode and status  Send a description of each alarm when it occurs

Keypad/Display

A 4-line by-20 character/line liquid crystal display and 6-key keypad is mounted on the unit controller. Its layout is shown in

Figure 2.



Figure 2, MicroTech II

Keypad

Menu Button

"Enter" Button

The four arrow buttons (UP, DOWN, LEFT, RIGHT) have three modes of use.

 Scroll between data screens as indicated by the arrows (default mode).  Select a specific data screen in a hierarchical fashion using dynamic labels on the right side of the display

(this mode is entered by pressing the MENU button).

 Change field values in edit mode.

8 Catalog ACZ-AGZB1-1

Figure 3, ACZ/AGZ-B Control Panel

Optional Remote Interface Panel

The ACZ/AGZ units can be individually equipped with a remote user interface. It provides convenient access to unit diagnostics and control adjustments, remote from the condensing unit panel. A separate panel is required for each chiller on a job site.

Each remote user interface is similar to its unit-mounted counterpart and offers the same functionality, including:  Touch-sensitive keypad with a 4 line by 20-character

display format

 Digital display of messages in English language  All operating conditions, system alarms, control

parameters

Features

 Can be wired up to 1,640 feet (500 meters) from the

unit for flexibility in placing each remote user interface within your building.

 The main control is isolated from the remote user interface

wiring so that wiring problems are less likely to damage the unit user interface.

 Can be placed on a desk or surface or recessed wall mounted.

Benefits

 Allows you to access the user interface for each unit from

one location, inside the building.

 Users need to learn one format because the remote user

interface is identical to the unit-mounted version.

 No additional field commissioning is required for the remote user interface.  Can be retrofit after unit installation.  All the BAS communications options are still available with the remote interface panel.

Figure 4, Remote Interface Panel Dimensions

Cable and Wiring Recommendations

No more than 1,640 feet (500 meters) of wiring can be used to connect the remote user interface to the unit. Power: AWG 22 twisted pair cable. Communications: Belden 9841 or equal AWG 22 twisted pair. A separate small communication terminal board is used at the unit and at the remote panel.

Catalog ACZ-AGZB1-1

Figure 5, Remote User Interface Wiring Diagram

Chiller Terminal Board

0 1 2 3 4 5 6

pLAN

cable

pLAN phone style cable to J10 of chiller Unit control

Note: Maximum distance between terminal blocks is 1640 feet (500 m)

Power is supplied through 30 Vdc + Power Common

RX+/Tx+

Rx-/Tx-

Shield

AWG22 twisted pair cable

Communications cable is

Belden 9841 or equivalent

WG22 twisted pai

Display Terminal Board

0 1 2 3 4 5 6

10 Catalog ACZ-AGZB1-1

ACZ Condensing Unit Performance

Selection Procedure

ACZ condensing units are selected in conjunction with some kind of evaporator equipment. The ACZ ratings are based on saturated suction temperature at the compressor inlet and on ambient air dry-bulb temperature. For a system selection, the ACZ condensing unit is usually selected first, and then the line loss added to the condensing unit saturated suction temperature to determine the saturated evaporating temperature. This temperature is then used for the selection of the evaporator, whether it is a DX cooling coil or water heat exchanger. The pipe size can be determined from procedures and data in the Refrigerant Piping Section. For selection purposes, the tubing size is based on a pressure equivalent of a two-degree F line loss (equal to about 3-psi pressure drop).

The correction for altitude found in the correction factor to ascertain the necessary unit capacity in the Capacity Tables.

R-407C NOTE: R-407C is an azeotrope and as such has a glide characteristic. An evaporator mid-point temperature will be about four-degrees higher than the dew point temperature. For example, an R-22 evaporator selected at a 40F evaporating temperature would be comparable to a 44F temperature with R-407C.

Selection example, Inch-Pound units

Given:

200 Mbh job requirement 95°F ambient temperature 40F saturated suction temperature 2,000 foot altitude R-22

1. To select the correct size unit, correct for altitude by dividing the required capacity by the correction

factor found in

200 Mbh required / 0.986 factor = 202 Mbh corrected requirement.

2. From

Table 2 on the following page, an ACZ 020 at the given conditions will produce 202.5 Mbh with a

unit power input of 20.0 kW and a unit EER of 10.1.

3. Correct for altitude:

Capacity: 202.5 Mbh x 0.986 = 200 Mbh Power: 20.0 kW x 1.009 = 20.2 kW EER: 10.1 EER x 0.986/1.009 = 9.9 EER

4. An evaporator would be selected at 42F saturated evaporating temperature.

Table 1.

Table 1 is applied, if applicable, by dividing the required job capacity by

Selection example-SI units

Use the same procedure as for Inch-Pounds but use SI tables and units.

Application Adjustment Factors

Altitude Correction Factors

Performance tables are based at sea level. Elevations other than sea level affect the performance of the unit. The decreased air density will reduce condenser capacity, consequently reducing the unit's performance.

Table 1, Altitude Correction Factors

Altitude Capacity Power

Sea Level 1.000 1.000

2000 ft (610 m) 0.986 1.009 4000 ft (1220) m 0.973 1.021 6000 ft (1830) m 0.959 1.031

ACZ Performance Data

Table 2, R-22, I-P Units, 60 Hz

ACZ Sat. Fan &

Catalog ACZ-AGZB1-1

Ambient Air Temperature (F)

75 85 95 105 115

Unit

PWR

Unit

PWR

Unit

PWR

Unit

PWR

Unit

PWR

Mbh

kWi

EER

Mbh

kWi

EER

Mbh

kWi

EER

Mbh

kWi

EER

Mbh

kWi 30 35

010

013

016

020

025

028

033

039

NOTES:

1. Ratings based on R-22, and sea level altitude.

2. Interpolation is allowed; extrapolation is not permitted. Consult McQuay for performance outside the cataloged ratings.

3. KWi and EER are for the entire unit, including compressors, fan motors and control power.

4. Rated in accordance with ARI Standard 365-2002.

40 45 50 55 30 35 40 45 50 55 30 35 40 45 50 55 30 35 40 45 50 55 30 35 40 45 50 55 30 35 40 45 50 55 30 35 40 45 50 55 30 35 40 45 50 55

1.8 87.4 8.0 10.9 86.2 8.3 10.4 81.3 8.9 9.1 76.4 9.7 7.9 71.6 10.5 6.8

1.8 97.1 8.1 12.0 94.7 8.4 11.3 89.8 9.1 9.9 84.9 9.8 8.7 78.9 10.6 7.4

1.8 106.8 8.3 12.9 104.4 8.6 12.1 98.3 9.2 10.7 93.4 10.0 9.4 87.4 10.8 8.1

1.8 116.5 8.4 13.9 114.1 8.7 13.1

1.8 127.4 8.6 14.8 125.0 8.9 14.1 118.9 9.6 12.4 111.6 10.3 10.8 105.6 11.2 9.4

1.8 138.3 8.9 15.6 135.9 9.2 14.8 128.6 9.8 13.1 122.6 10.6 11.6 115.3 11.4 10.1

1.8 114.7 10.7 10.7 111.0 11.2 9.9 106.1 12.2 8.7 99.9 13.3 7.5 93.7 14.5 6.5

1.8 128.3 11.0 11.6 124.6 11.4 10.9 118.4 12.5 9.5 112.2 13.6 8.3 104.8 14.8 7.1

1.8 143.1 11.2 12.7 139.4 11.7 11.9 133.2 12.7 10.5 125.8 13.8 9.1 118.4 15.1 7.8

1.8 159.1 11.6 13.7 155.4 12.1 12.9

1.8 175.1 12.0 14.7 171.4 12.4 13.9 162.8 13.4 12.2 155.4 14.5 10.7 145.5 15.8 9.2

1.8 192.4 12.3 15.7 188.7 12.8 14.8 180.1 13.7 13.1 170.2 14.8 11.5 160.3 16.2 9.9

1.8 157.8 15.6 10.1 154.0 16.3 9.5 146.4 17.8 8.2 138.7 19.5 7.1 131.1 21.2 6.2

1.8 174.4 15.9 11.0 169.3 16.6 10.2 161.6 18.0 9.0 152.7 19.7 7.8 143.8 21.5 6.7

1.8 190.9 16.1 11.8 187.1 16.8 11.1 178.2 18.3 9.7 169.3 20.0 8.4 159.1 21.9 7.3

1.8 210.0 16.5 12.7 204.9 17.2 11.9

1.8 230.4 16.8 13.7 225.3 17.5 12.9 213.8 19.0 11.2 203.6 20.7 9.8 190.9 22.6 8.5

1.8 252.0 17.3 14.6 246.9 18.0 13.7 234.2 19.5 12.0 222.7 21.2 10.5 210.0 23.0 9.1

1.8 181.7 16.8 10.8 178.1 17.5 10.2 168.3 19.1 8.8 158.6 20.9 7.6 148.8 22.7 6.6

1.8 200.0 17.2 11.6 195.2 17.9 10.9 185.4 19.5 9.5 174.4 21.3 8.2 163.5 23.2 7.1

1.8 219.6 17.6 12.5 214.7 18.3 11.8 202.5 20.0 10.1 191.5 21.8 8.8 179.3 23.7 7.6

1.8 240.3 18.0 13.4 234.2 18.8 12.5

1.8 261.0 18.5 14.1 254.9 19.3 13.2 241.5 20.9 11.6 228.1 22.7 10.1 214.7 24.7 8.7

1.8 284.2 19.0 15.0 276.9 19.8 14.0 262.3 21.4 12.3 247.6 23.3 10.6 233.0 25.3 9.2

2.7 242.9 22.7 10.7 237.9 23.6 10.1 225.4 25.7 8.8 211.6 27.9 7.6 197.8 30.4 6.5

2.7 267.9 23.2 11.6 261.7 24.1 10.9 247.9 26.2 9.5 234.1 28.5 8.2 219.1 31.0 7.1

2.7 294.2 23.7 12.4 286.7 24.7 11.6 273.0 26.8 10.2 256.7 29.1 8.8 240.4 31.6 7.6

2.7 321.8 24.3 13.2 314.3 25.3 12.4

2.7 351.8 25.1 14.0 343.1 26.0 13.2 325.5 28.1 11.6 306.8 30.4 10.1 288.0 33.0 8.7

2.7 381.9 25.7 14.9 373.1 26.7 14.0 354.3 28.8 12.3 334.3 31.1 10.8 314.3 33.8 9.3

2.7 266.8 26.1 10.2 260.5 27.1 9.6 246.7 29.4 8.4 231.6 32.0 7.2 216.5 34.8 6.2

2.7 294.5 26.7 11.0 287.0 27.8 10.3 271.9 30.1 9.0 255.5 32.7 7.8 239.2 35.5 6.7

2.7 322.2 27.5 11.7 314.7 28.5 11.0 298.3 30.9 9.7 280.7 33.5 8.4 263.1 36.4 7.2

2.7 352.4 28.2 12.5 343.6 29.3 11.7

2.7 383.9 29.1 13.2 375.1 30.1 12.4 356.2 32.5 11.0 336.1 35.2 9.5 314.7 38.1 8.3

2.7 417.9 29.9 14.0 407.8 31.0 13.2 386.4 33.4 11.6 365.0 36.0 10.1 342.4 39.1 8.8

2.7 314.1 30.0 10.5 307.0 31.4 9.8 291.6 34.4 8.5 275.0 37.6 7.3 258.4 41.0 6.3

2.7 346.1 30.8 11.2 337.8 32.1 10.5 320.0 35.1 9.1 302.2 38.4 7.9 284.4 42.0 6.8

2.7 379.3 31.6 12.0 369.8 33.0 11.2 350.8 36.1 9.7 331.9 39.3 8.4 311.7 42.9 7.3

2.7 413.6 32.5 12.7 404.1 33.9 11.9

2.7 450.4 33.5 13.4 439.7 34.9 12.6 418.4 38.0 11.0 395.9 41.4 9.6 372.1 45.1 8.3

2.7 489.5 34.6 14.2 477.6 36.0 13.3 453.9 39.1 11.6 429.0 42.5 10.1 403.0 46.2 8.7

2.7 390.0 40.8 9.6 380.5 42.4 9.0 360.2 46.1 7.8 337.7 50.0 6.8 312.7 54.1 5.8

2.7 429.2 41.9 10.2 418.5 43.7 9.6 395.9 47.4 8.3 370.9 51.4 7.2 344.8 55.7 6.2

2.7 469.6 43.2 10.9 457.7 45.0 10.2 432.8 48.8 8.9 406.6 52.9 7.7 378.1 57.2 6.6

2.7 511.2 44.5 11.5 498.2 46.4 10.7

2.7 555.2 46.1 12.0 542.1 47.9 11.3 512.4 51.8 9.9 482.7 56.0 8.6 449.4 60.5 7.4

2.7 602.8 47.7 12.6 587.3 49.5 11.9 555.2 53.4 10.4 521.9 57.8 9.0 487.5 62.3 7.8

108.0 9.4 11.5

148.0 13.0 11.4

196.0 18.7 10.5

222.0 20.4 10.9

298.0 27.3 10.9

326.0 31.7 10.3

384.0 36.9 10.4

472.0 50.2 9.4

101.9 10.1 10.1 95.9 11.0 8.7

139.4 14.1 9.9 132.0 15.5 8.5

185.8 20.4 9.1 174.4 22.2 7.8

209.8 22.2 9.5 196.4 24.2 8.1

281.7 29.7 9.5 264.2 32.3 8.2

308.4 34.3 9.0 288.2 37.2 7.7

362.7 40.3 9.0 341.3 44.0 7.8

443.5 54.4 8.1 413.7 58.8 7.0

Unit EER

12 Catalog ACZ-AGZB1-1

Table 3, R-407C, I-P Units, 60 Hz

Suction

ACZ

Dewpoint

Unit Size

NOTES:

1. Ratings based on R-407C, and sea level altitude.

2. Interpolation is allowed; extrapolation is not permitted. Consult McQuay for performance outside the cataloged ratings.

3. KWi and EER are for the entire unit, including compressors, fan motors and control power.

4. Rated in accordance with ARI Standard 365-2002.

010

013

016

020

025

028

033

039

Temp

(F)

30 1.8 85.6 8.2 10.4 84.4 8.6 9.9 79.7 9.2 8.7 74.9 10.0 7.5 70.2 10.8 6.5 35 1.8 95.1 8.3 11.4 92.8 8.7 10.7 88.0 9.4 9.4 83.2 10.1 8.2 77.3 10.9 7.1 40 1.8 104.7 8.6 12.2 102.3 8.9 11.5 96.3 9.5 10.2 91.6 10.3 8.9 85.6 11.1 7.7 45 1.8 114.2 8.7 13.2 111.8 9.0 12.5 50 1.8 124.9 8.9 14.1 122.5 9.2 13.4 116.5 9.9 11.8 109.4 10.6 10.3 103.5 11.5 9.0 55 1.8 135.6 9.2 14.8 133.2 9.5 14.0 126.1 10.1 12.5 120.1 10.9 11.0 113.0 11.7 9.6 30 1.8 112.4 11.1 10.2 108.8 11.6 9.4 103.9 12.5 8.3 97.9 13.7 7.1 91.9 15.0 6.1 35 1.8 125.7 11.4 11.1 122.1 11.8 10.3 116.0 12.9 9.0 110.0 14.0 7.8 102.7 15.3 6.7 40 1.8 140.2 11.6 12.1 136.6 12.1 11.3 130.5 13.1 10.0 123.3 14.2 8.7 116.0 15.6 7.4 45 1.8 155.9 12.0 13.0 152.3 12.4 12.2 50 1.8 171.6 12.3 13.9 168.0 12.8 13.2 159.5 13.8 11.5 152.3 15.0 10.2 142.6 16.3 8.8 55 1.8 188.6 12.6 14.9 184.9 13.2 14.0 176.5 14.1 12.5 166.8 15.3 10.9 157.1 16.7 9.4 30 1.8 154.7 16.1 9.6 150.9 16.8 9.0 143.4 18.3 7.8 136.0 20.1 6.8 128.5 21.9 5.9 35 1.8 170.9 16.4 10.4 165.9 17.1 9.7 158.4 18.5 8.5 149.7 20.3 7.4 140.9 22.2 6.3 40 1.8 187.1 16.7 11.2 183.3 17.4 10.6 174.6 18.9 9.2 165.9 20.7 8.0 155.9 22.6 6.9 45 1.8 205.8 17.0 12.1 200.8 17.7 11.3 50 1.8 225.8 17.4 13.0 220.8 18.1 12.2 209.5 19.6 10.7 199.6 21.4 9.3 187.1 23.3 8.0 55 1.8 247.0 17.8 13.8 242.0 18.5 13.0 229.5 20.1 11.4 218.3 21.9 10.0 205.8 23.7 8.7 30 1.8 178.1 17.3 10.3 174.5 18.0 9.7 165.0 19.7 8.4 155.4 21.5 7.2 145.8 23.4 6.2 35 1.8 196.0 17.7 11.1 191.3 18.4 10.4 181.7 20.1 9.0 170.9 21.9 7.8 160.2 23.9 6.7 40 1.8 215.2 18.1 11.9 210.4 18.8 11.2 198.4 20.6 9.6 187.7 22.5 8.4 175.7 24.4 7.2 45 1.8 235.5 18.5 12.7 229.5 19.4 11.9 50 1.8 255.8 19.1 13.4 249.8 19.9 12.6 236.7 21.5 11.0 223.5 23.4 9.6 210.4 25.4 8.3 55 1.8 278.5 19.6 14.2 271.4 20.4 13.3 257.0 22.0 11.7 242.7 24.0 10.1 228.3 26.1 8.8 30 2.7 238.0 23.4 10.2 233.1 24.3 9.6 220.9 26.5 8.3 207.4 28.7 7.2 193.9 31.3 6.2 35 2.7 262.6 23.9 11.0 256.5 24.9 10.3 243.0 27.0 9.0 229.5 29.4 7.8 214.7 32.0 6.7 40 2.7 288.4 24.4 11.8 281.0 25.5 11.0 267.5 27.7 9.7 251.5 30.0 8.4 235.6 32.6 7.2 45 2.7 315.4 25.1 12.6 308.0 26.1 11.8 50 2.7 344.8 25.8 13.3 336.2 26.8 12.5 319.0 29.0 11.0 300.6 31.3 9.6 282.2 34.0 8.3 55 2.7 374.3 26.5 14.1 365.7 27.6 13.3 347.3 29.7 11.7 327.6 32.1 10.2 308.0 34.9 8.8 30 2.7 261.5 26.9 9.7 255.3 28.0 9.1 241.8 30.3 8.0 227.0 33.0 6.9 212.2 35.9 5.9 35 2.7 288.6 27.6 10.5 281.2 28.7 9.8 266.4 31.1 8.6 250.4 33.8 7.4 234.4 36.6 6.4 40 2.7 315.8 28.3 11.1 308.4 29.4 10.5 292.3 31.9 9.2 275.1 34.5 8.0 257.8 37.5 6.9 45 2.7 345.4 29.1 11.9 336.7 30.2 11.1 50 2.7 376.2 30.0 12.5 367.6 31.1 11.8 349.1 33.5 10.4 329.3 36.3 9.1 308.4 39.3 7.8 55 2.7 409.5 30.9 13.3 399.7 32.0 12.5 378.7 34.4 11.0 357.7 37.2 9.6 335.5 40.3 8.3 30 2.7 307.8 30.9 10.0 300.8 32.3 9.3 285.7 35.4 8.1 269.5 38.8 7.0 253.2 42.3 6.0 35 2.7 339.2 31.8 10.7 331.0 33.1 10.0 313.6 36.2 8.7 296.2 39.6 7.5 278.8 43.3 6.4 40 2.7 371.7 32.6 11.4 362.4 34.0 10.7 343.8 37.2 9.2 325.2 40.5 8.0 305.5 44.3 6.9 45 2.7 405.4 33.6 12.1 396.1 35.0 11.3 50 2.7 441.4 34.6 12.8 430.9 36.0 12.0 410.0 39.2 10.5 387.9 42.7 9.1 364.7 46.5 7.8 55 2.7 479.7 35.7 13.5 468.1 37.1 12.6 444.8 40.3 11.0 420.5 43.8 9.6 394.9 47.7 8.3 30 2.7 382.2 42.1 9.1 372.8 43.8 8.5 353.0 47.6 7.4 330.9 51.6 6.4 306.4 55.8 5.5 35 2.7 420.6 43.2 9.7 410.1 45.0 9.1 388.0 48.9 7.9 363.5 53.1 6.9 337.9 57.4 5.9 40 2.7 460.2 44.6 10.3 448.6 46.4 9.7 424.1 50.3 8.4 398.5 54.5 7.3 370.5 59.0 6.3 45 2.7 501.0 46.0 10.9 488.2 47.9 10.2 50 2.7 544.1 47.6 11.4 531.3 49.4 10.8 502.2 53.4 9.4 473.0 57.8 8.2 440.4 62.5 7.1 55 2.7 590.7 49.2 12.0 575.6 51.1 11.3 544.1 55.1 9.9 511.5 59.6 8.6 477.7 64.3 7.4

Fan &

Control

Power

(kW)

75 85 95 105 115

Unit

PWR

Unit

Mbh

kWi

EER

PWR

Mbh

Ambient Air Temperature (F)

Unit

kWi

EER

PWR

Mbh

kWi

105.8 9.7 10.9

145.0 13.4 10.8

192.1 19.3 10.0

217.6 21.0 10.4

292.0 28.2 10.4

319.5 32.6 9.8

376.3 38.1 9.9

462.6 51.8 8.9

Unit

PWR

Unit

EER

Mbh

kWi

99.9 10.4 9.6 93.9 11.3 8.3

136.6 14.6 9.4 129.3 15.9 8.1

182.1 21.0 8.7 170.9 22.9 7.5

205.6 22.9 9.0 192.5 24.9 7.7

276.1 30.7 9.0 258.9 33.4 7.8

302.2 35.4 8.5 282.5 38.4 7.4

355.4 41.6 8.5 334.5 45.4 7.4

434.6 56.2 7.7 405.5 60.6 6.7

EER

Unit

Mbh

PWR

kWi

Unit EER

Catalog ACZ-AGZB1-1

Table 4, R-22, SI Units, 60 Hz,

Sat.

ACZ

Suction

Unit

Temp

Size

010

013

016

020

025

028

033

039

NOTES:

1. Ratings based on R-22, and sea level altitude.

2. Interpolation is allowed; extrapolation is not permitted. Consult McQuay for performance outside the cataloged ratings.

3. KWi and EER are for the entire unit, including compressors, fan motors and control power.

(C)

-1

11 13

-1

11 13

-1

11 13

-1

11 13

-1

11 13

-1

11 13

-1

11 13

-1

11 13

Fan &

Control

Power

(kW)

1.8 25.7 7.6 3.4 24.4 8.3 2.9 23.2 8.8 2.6 21.7 9.6 2.3 20.3 10.5 1.9

2 5 8

1.8 28.5 7.8 3.6 27.1 8.4 3.2 25.9 9.0 2.9 24.3 9.8 2.5 22.6 10.7 2.1

1.8 31.6 7.9 4.0 30.1 8.6 3.5 28.6 9.2 3.1 26.9 10.0 2.7 25.2 10.9 2.3

1.8 34.8 8.1 4.3 33.1 8.8 3.8

1.8 38.2 8.4 4.5 36.5 9.0 4.0 34.8 9.6 3.6 32.8 10.4 3.2 30.8 11.3 2.7

1.8 40.7 8.5 4.8 38.7 9.1 4.3 37.1 9.7 3.8 34.9 10.6 3.3 32.7 11.5 2.9

1.8 33.5 10.2 3.3 31.8 11.2 2.8 30.3 12.1 2.5 28.5 13.3 2.1 26.5 14.7 1.8

1.8 37.9 10.5 3.6 36.0 11.4 3.1 34.4 12.4 2.8 32.4 13.6 2.4 30.1 15.0 2.0

1.8 42.6 10.8 3.9 40.5 11.8 3.4 38.7 12.7 3.0 36.5 13.9 2.6 34.1 15.3 2.2

1.8 47.6 11.2 4.2 45.3 12.2 3.7

1.8 52.9 11.6 4.6 50.4 12.5 4.0 48.2 13.4 3.6 45.5 14.6 3.1 42.7 16.0 2.7

1.8 56.5 11.9 4.8 53.9 12.8 4.2 51.6 13.6 3.8 48.7 14.8 3.3 45.7 16.3 2.8

1.8 46.4 14.9 3.1 43.9 16.4 2.7 42.0 17.6 2.4 39.6 19.5 2.0 37.1 21.4 1.7

1.8 51.5 15.3 3.4 48.9 16.6 2.9 46.8 18.0 2.6 44.1 19.8 2.2 41.3 21.7 1.9

1.8 57.0 15.6 3.7 54.2 17.0 3.2 51.9 18.3 2.8 49.0 20.1 2.4 45.9 22.1 2.1

1.8 63.1 15.9 4.0 59.9 17.3 3.5

1.8 69.7 16.3 4.3 66.2 17.8 3.7 63.3 19.1 3.3 59.8 20.9 2.9 56.0 23.0 2.4

1.8 74.2 16.6 4.5 70.6 18.1 3.9 67.6 19.3 3.5 63.8 21.3 3.0 59.6 23.2 2.6

1.8 53.6 15.9 3.4 50.7 17.5 2.9 48.3 18.9 2.6 45.2 20.8 2.2 42.2 22.8 1.8

1.8 59.3 16.3 3.6 56.2 17.9 3.1 53.6 19.4 2.8 50.3 21.3 2.4 46.9 23.3 2.0

1.8 65.6 16.8 3.9 62.1 18.4 3.4 59.1 19.9 3.0 55.5 21.8 2.5 51.9 23.8 2.2

1.8 72.0 17.3 4.2 68.2 18.9 3.6

1.8 79.0 17.8 4.4 74.8 19.4 3.9 71.3 20.9 3.4 66.9 22.8 2.9 62.6 25.0 2.5

1.8 83.7 18.1 4.6 79.3 19.8 4.0 75.6 21.3 3.6 71.0 23.2 3.1 66.4 25.4 2.6

2.7 71.4 21.7 3.3 67.7 23.6 2.9 64.6 25.5 2.5 60.5 27.9 2.2 56.1 30.5 1.8

2.7 79.2 22.2 3.6 75.2 24.2 3.1 71.7 26.1 2.7 67.2 28.5 2.4 62.5 31.3 2.0

2.7 87.6 22.8 3.8 83.2 24.9 3.3 79.3 26.7 3.0 74.4 29.2 2.5 69.3 32.0 2.2

2.7 96.5 23.5 4.1 91.6 25.5 3.6

2.7 105.8 24.2 4.4 100.5 26.2 3.8 95.9 28.1 3.4 90.1 30.6 2.9 84.1 33.4 2.5

2.7 112.4 24.8 4.5 106.7 26.7 4.0 101.7 28.6 3.6 95.6 31.2 3.1 89.3 33.9 2.6

2.7 78.4 24.9 3.1 74.4 27.2 2.7 70.8 29.3 2.4 66.1 32.0 2.1 61.1 35.0 1.7

2.7 86.9 25.7 3.4 82.5 27.9 2.9 78.6 30.1 2.6 73.6 32.8 2.2 68.2 35.9 1.9

2.7 96.0 26.4 3.6 91.2 28.7 3.2 86.9 30.8 2.8 81.4 33.7 2.4 75.6 36.8 2.1

2.7 105.6 27.3 3.9 100.2 29.5 3.4

2.7 115.8 28.2 4.1 109.9 30.5 3.6 104.7 32.6 3.2 98.3 35.5 2.8 91.6 38.7 2.4

2.7 122.7 28.9 4.2 116.4 31.1 3.7 111.0 33.2 3.3 104.2 36.1 2.9 97.2 39.3 2.5

2.7 92.3 28.5 3.2 87.6 31.4 2.8 83.5 34.1 2.4 78.6 37.5 2.1 73.5 41.2 1.8

2.7 102.2 29.4 3.5 97.1 32.3 3.0 92.7 34.9 2.7 87.2 38.4 2.3 81.5 42.2 1.9

2.7 112.8 30.2 3.7 107.2 33.2 3.2 102.3 35.9 2.8 96.3 39.5 2.4 90.0 43.3 2.1

2.7 124.0 31.2 4.0 117.8 34.2 3.4

2.7 135.8 32.3 4.2 129.0 35.2 3.7 123.2 38.1 3.2 115.9 41.7 2.8 108.4 45.7 2.4

2.7 143.9 33.1 4.3 136.7 36.1 3.8 130.6 38.8 3.4 122.9 42.5 2.9 114.9 46.6 2.5

2.7 114.7 38.9 2.9 108.8 42.5 2.6 103.5 45.8 2.3 96.4 50.0 1.9 88.7 54.3 1.6

2.7 126.9 40.1 3.2 120.3 43.8 2.7 114.5 47.1 2.4 106.9 51.4 2.1 98.6 55.9 1.8

2.7 139.8 41.5 3.4 132.5 45.3 2.9 126.1 48.7 2.6 117.8 53.1 2.2 108.9 57.7 1.9

2.7 153.4 42.9 3.6 145.4 46.8 3.1

2.7 167.7 44.6 3.8 158.8 48.5 3.3 151.1 52.0 2.9 141.3 56.5 2.5 131.0 61.3 2.1

2.7 177.5 45.7 3.9 168.1 49.6 3.4 159.9 53.1 3.0 149.6 57.7 2.6 138.7 62.7 2.2

24°C 30°C 35°C 41°C 47°C

Unit

PWR

Unit

kWi

COP

Unit kWPWR

kWi

Ambient Air Temperature (F)

Unit

Unit kWPWR

COP

31.7 9.4 3.4

43.4 13.0 3.3

57.4 18.7 3.1

65.1 20.4 3.2

87.3 27.3 3.2

95.5 31.7 3.0

112.5 36.9 3.0

138.3 50.2 2.8

kWi

Unit

COP

Unit kWPWR

29.8 10.2 2.9 27.9 11.1 2.5

40.9 14.2 2.9 38.2 15.6 2.4

54.2 20.5 2.6 50.7 22.5 2.2

61.1 22.2 2.7 57.0 24.4 2.3

82.1 29.9 2.7 76.6 32.7 2.3

89.6 34.5 2.6 83.4 37.7 2.2

105.9 40.5 2.6 99.0 44.5 2.2

129.3 54.7 2.4 119.8 59.5 2.0

kWi

Unit

COP

Unit kWPWR

kWi

Unit

COP

14 Catalog ACZ-AGZB1-1

Table 5, R-407C, SI, 60 Hz

Suction

ACZ

Dewpoint

Unit

Size

NOTES:

Temp

(C)

-1

010

11 13

-1

013

11 13

-1

016

11 13

-1

020

11 13

-1

025

11 13

-1

028

11 13

-1

033

11 13

-1

039

11 13

1. Ratings based on R-407C and sea level altitude.

2. Interpolation is allowed; extrapolation is not permitted. Consult McQuay for performance outside the cataloged ratings.

3. KWi and COP are for the entire unit, including compressors, fan motors and control power.

Fan &

Control

Power

(kW)

1.8 25.1 7.6 3.3 23.9 8.3 2.9 22.7 8.8 2.6 21.3 9.6 2.2 19.8 10.5 1.9

2 5 8

1.8 27.9 7.8 3.6 26.6 8.4 3.2 25.3 9.0 2.8 23.8 9.8 2.4 22.2 10.7 2.1

1.8 30.9 7.9 3.9 29.5 8.6 3.4 28.0 9.2 3.0 26.4 10.0 2.6 24.7 10.9 2.3

1.8 34.1 8.1 4.2 32.5 8.8 3.7

1.8 37.5 8.4 4.5 35.7 9.0 4.0 34.1 9.6 3.6 32.2 10.4 3.1 30.2 11.3 2.7

1.8 39.9 8.5 4.7 38.0 9.1 4.2 36.3 9.7 3.7 34.2 10.6 3.2 32.1 11.5 2.8

1.8 32.8 10.2 3.2 31.1 11.2 2.8 29.7 12.1 2.5 27.9 13.3 2.1 26.0 14.7 1.8

1.8 37.1 10.5 3.5 35.3 11.4 3.1 33.7 12.4 2.7 31.7 13.6 2.3 29.5 15.0 2.0

1.8 41.7 10.8 3.8 39.7 11.8 3.4 37.9 12.7 3.0 35.8 13.9 2.6 33.4 15.3 2.2

1.8 46.6 11.2 4.1 44.4 12.2 3.6

1.8 51.8 11.6 4.5 49.4 12.5 4.0 47.2 13.4 3.5 44.6 14.6 3.0 41.8 16.0 2.6

1.8 55.3 11.9 4.7 52.8 12.8 4.1 50.5 13.6 3.7 47.7 14.8 3.2 44.8 16.3 2.7

1.8 45.4 14.9 3.0 43.0 16.4 2.6 41.2 17.6 2.3 38.8 19.5 2.0 36.3 21.4 1.7

1.8 50.5 15.3 3.3 47.9 16.6 2.9 45.8 18.0 2.5 43.2 19.8 2.2 40.5 21.7 1.9

1.8 55.9 15.6 3.6 53.2 17.0 3.1 50.8 18.3 2.8 48.0 20.1 2.4 44.9 22.1 2.0

1.8 61.9 15.9 3.9 58.7 17.3 3.4

1.8 68.3 16.3 4.2 64.9 17.8 3.7 62.1 19.1 3.2 58.6 20.9 2.8 54.9 23.0 2.4

1.8 72.7 16.6 4.4 69.2 18.1 3.8 66.2 19.3 3.4 62.5 21.3 2.9 58.4 23.2 2.5

1.8 52.5 15.9 3.3 49.7 17.5 2.8 47.3 18.9 2.5 44.3 20.8 2.1 41.3 22.8 1.8

1.8 58.1 16.3 3.6 55.1 17.9 3.1 52.5 19.4 2.7 49.3 21.3 2.3 46.0 23.3 2.0

1.8 64.2 16.8 3.8 60.8 18.4 3.3 57.9 19.9 2.9 54.4 21.8 2.5 50.8 23.8 2.1

1.8 70.6 17.3 4.1 66.9 18.9 3.5

1.8 77.4 17.8 4.3 73.3 19.4 3.8 69.9 20.9 3.3 65.6 22.8 2.9 61.3 25.0 2.4

1.8 82.0 18.1 4.5 77.8 19.8 3.9 74.1 21.3 3.5 69.6 23.2 3.0 65.0 25.4 2.6

2.7 69.9 21.7 3.2 66.4 23.6 2.8 63.3 25.5 2.5 59.3 27.9 2.1 55.0 30.5 1.8

2.7 77.6 22.2 3.5 73.7 24.2 3.0 70.2 26.1 2.7 65.9 28.5 2.3 61.3 31.3 2.0

2.7 85.9 22.8 3.8 81.5 24.9 3.3 77.7 26.7 2.9 72.9 29.2 2.5 68.0 32.0 2.1

2.7 94.6 23.5 4.0 89.8 25.5 3.5

2.7 103.7 24.2 4.3 98.4 26.2 3.8 94.0 28.1 3.3 88.3 30.6 2.9 82.4 33.4 2.5

2.7 110.1 24.8 4.4 104.5 26.7 3.9 99.6 28.6 3.5 93.7 31.2 3.0 87.5 33.9 2.6

2.7 76.8 24.9 3.1 72.9 27.2 2.7 69.4 29.3 2.4 64.8 32.0 2.0 59.9 35.0 1.7

2.7 85.1 25.7 3.3 80.8 27.9 2.9 77.0 30.1 2.6 72.1 32.8 2.2 66.8 35.9 1.9

2.7 94.0 26.4 3.6 89.3 28.7 3.1 85.1 30.8 2.8 79.8 33.7 2.4 74.1 36.8 2.0

2.7 103.4 27.3 3.8 98.2 29.5 3.3

2.7 113.5 28.2 4.0 107.7 30.5 3.5 102.6 32.6 3.1 96.3 35.5 2.7 89.7 38.7 2.3

2.7 120.3 28.9 4.2 114.1 31.1 3.7 108.8 33.2 3.3 102.1 36.1 2.8 95.2 39.3 2.4

2.7 90.5 28.5 3.2 85.8 31.4 2.7 81.9 34.1 2.4 77.1 37.5 2.1 72.0 41.2 1.7

2.7 100.2 29.4 3.4 95.2 32.3 2.9 90.8 34.9 2.6 85.5 38.4 2.2 79.9 42.2 1.9

2.7 110.6 30.2 3.7 105.1 33.2 3.2 100.3 35.9 2.8 94.3 39.5 2.4 88.2 43.3 2.0

2.7 121.5 31.2 3.9 115.5 34.2 3.4

2.7 133.1 32.3 4.1 126.4 35.2 3.6 120.8 38.1 3.2 113.6 41.7 2.7 106.2 45.7 2.3

2.7 141.0 33.1 4.3 134.0 36.1 3.7 128.0 38.8 3.3 120.4 42.5 2.8 112.6 46.6 2.4

2.7 112.4 38.9 2.9 106.7 42.5 2.5 101.4 45.8 2.2 94.5 50.0 1.9 86.9 54.3 1.6

2.7 124.4 40.1 3.1 117.9 43.8 2.7 112.2 47.1 2.4 104.8 51.4 2.0 96.6 55.9 1.7

2.7 137.0 41.5 3.3 129.9 45.3 2.9 123.6 48.7 2.5 115.5 53.1 2.2 106.7 57.7 1.8

2.7 150.4 42.9 3.5 142.5 46.8 3.0

2.7 164.4 44.6 3.7 155.7 48.5 3.2 148.1 52.0 2.8 138.5 56.5 2.4 128.4 61.3 2.1

2.7 174.0 45.7 3.8 164.8 49.6 3.3 156.7 53.1 2.9 146.6 57.7 2.5 135.9 62.7 2.2

24C 30C 35C 41C 47C

PWR

Unit

kWi

COP

Unit

Ambient Air Temperature (F)

PWR

Unit

kWi

Unit

COP

31.0 9.4 3.1

42.5 13.0 3.1

56.3 18.7 2.9

63.8 20.4 3.0

85.6 27.3 3.0

93.6 31.7 2.8

110.3 36.9 2.8

135.6 50.2 2.6

PWR

kWi

Unit

PWR

Unit

COP

kWi

29.2 10.2 2.9 27.4 11.1 2.5

40.1 14.2 2.8 37.4 15.6 2.4

53.2 20.5 2.6 49.7 22.5 2.2

59.9 22.2 2.7 55.9 24.4 2.3

80.4 29.9 2.7 75.0 32.7 2.3

87.8 34.5 2.5 81.7 37.7 2.2

103.8 40.5 2.6 97.0 44.5 2.2

126.8 54.7 2.3 117.4 59.5 2.0

COP

Unit

PWR

kWi

Unit

COP

Catalog ACZ-AGZB1-1

ACZ Part Load Data

Table 6, IP Units, 60Hz

R-22 Part Load Data R-407C Part Load Data

Suct

ACZ

Unit

% Load

Size

010B

013B

016B

020B

025B

028B

033B

039B

NOTES:

1. Certified according to ARI Standard 365-2002.

2. The 100 percent load, 95F, performance data is for information only and is not a factor in calculating a condensing unit IPLV.

Outdoor

Air Temp

100 95.0 45.0 108 9.4 11.5 100 95.0 45.0 105.8 9.7 10.9 100 80.0 50.0 126 8.7 14.5 100 80.0 50.0 123.7 9.0 13.8

51 80.0 50.0 64 4.9 13.1

100 95.0 45.0 148 13.0 11.4 100 95.0 45.0 145.0 13.4 10.8 100 80.0 50.0 173 12.1 14.3 100 80.0 50.0 169.8 12.5 13.6

51 80.0 50.0 88 6.3 14.0

100 95.0 45.0 196 18.7 10.5 100 95.0 45.0 192.1 19.3 10.0 100 80.0 50.0 228 17.1 13.3 100 80.0 50.0 223.3 17.7 12.6

52 80.0 50.0 118 8.4 14.1

100 95.0 45.0 222 20.4 10.9 100 95.0 45.0 217.6 21.0 10.4 100 80.0 50.0 258 18.8 13.7 100 80.0 50.0 252.8 19.4 13.0

52 80.0 50.0 134 9.2 14.6

100 95.0 45.0 298 27.3 10.9 100 95.0 45.0 292.0 28.2 10.4 100 80.0 50.0 348 25.6 13.6 100 80.0 50.0 340.5 26.4 12.9

52 80.0 50.0 181 12.3 14.7

100 95.0 45.0 326 31.7 10.3 100 95.0 45.0 319.5 32.6 9.8 100 80.0 50.0 380 28.0 12.8 100 80.0 50.0 371.9 30.5 12.2

53 80.0 50.0 202 14.3 14.1

100 95.0 45.0 384 36.9 10.4 100 95.0 45.0 376.3 38.1 9.9 100 80.0 50.0 445 34.2 13.0 100 80.0 50.0 436.2 35.2 12.4

53 80.0 50.0 238 16.4 14.5

100 95.0 45.0 472 50.2 9.4 100 95.0 45.0 462.6 51.8 8.9 100 80.0 50.0 549 46.9 11.7 100 80.0 50.0 537.7 48.4 11.1

53 80.0 50.0 292 21.5 13.6

Sat. Suct.

Temp.

(F)

Cap. Mbh

Power

kWi

EER IPLV

13.7 010B

14.1 013B

13.8 016B

14.3 020B

14.3 025B

13.6 028B

14.0 033B

12.9 039B

ACZ Unit Size

Outdoor

% Load

53 80.0 50.0 63 4.2 12.5

53 80.0 50.0 87 6.5 13.3

53 80.0 50.0 116 8.6 13.4

53 80.0 50.0 132 9.5 13.9

53 80.0 50.0 177 12.6 14.0

53 80.0 50.0 197 14.7 13.4

53 80.0 50.0 231 16.7 13.8

53 80.0 50.0 285 21.9 13.0

Air

Temp

Dew Point Temp

(F)

Cap. Mbh

Power

kWi

EER IPLV

13.0

13.4

13.0

13.5

13.6

13.0

13.2

12.2

16 Catalog ACZ-AGZB1-1

AGZ Chiller Selection Procedure

Packaged Chiller, Model BS

Selection with Inch-Pound (I-P) units

Table 15 through Table 18 cover the range of leaving evaporator water temperatures and outside ambient temperatures included under ARI Standard 550/590-2003. The tables are based on a 10 degree F (5.5 degree C) temperature drop through the evaporator. Adjustment factors for applications having other than a 10 degree F (5.5 degree C) drop can be found in without glycol is 40°F (4C). For brine selections, see Ratings are based on a 0.0001 ft fouling factors, different Delta-Ts, or altitude correction factors see catalog ratings contact your local McQuay sales representative.

x hr x F/Btu fouling factor in the evaporator at sea level operation. For other

Selection example



20 tons minimum requirement



95°F ambient temperature



48 gpm, 54F to 44°F chilled water



0.0001 evaporator fouling factor



1. From

2. Use the following formula to calculate any unknown elements.

3. Determine the evaporator pressure drop. Using

Table 16, an AGZ 020B at the given conditions will produce 21.5 tons with a unit kW input of 29.0

and a unit EER of 8.9.

tons

AGZ 020B line intersect. Read horizontally to obtain an evaporator pressure drop of 5.9 feet of water. Note the allowable minimum and maximum flows.





(water only)

gpm =

Table 9. The minimum leaving chilled water temperature setpoint

Table 7 through Table 8 for glycol adjustment factors.

Table 9. For applications outside the

Figure 7 on page, enter at 48 gpm and follow up to the

Selection example using ethylene glycol



20 tons minimum requirement



95°F ambient air temperature



54°F - 44°F chilled water temperature



0.0001 evaporator fouling factor



Protect from freezing down to 0°F



1. From

2. At 40% ethylene glycol, the adjustment factors are: Capacity =0.980, kW = 0.992, GPM = 1.132, pressure drop = 1.557

3. Select the AGZ 020B from

4. Correct capacity = 0.980 X 21.5 tons = 21.1 tons

5. Correct compressor kW = 0.992 X 29.0 kW = 28.8 kW

6. Calculate chilled water flow:

Glycol flow (at 40% solution) = 1.132 X 48.0 gpm = 54.3 gpm

Determine the evaporator pressure drop. Using 020B line intersect. Read horizontally to obtain an evaporator pressure drop of 5.9 feet. Correct the pressure drop for 40% solution = 1.557 x 5.9 feet = 9.2 feet for ethylene glycol.

Table 7, select an ethylene glycol concentration of 40% to protect against freezing at 0°F.

Table 16 and correct with 40% ethylene glycol factors.

tons

= capacity) corrected(at flowWater

24×0.20

gpm 48 =

°10

Figure 7, enter at 20 gpm (water) and follow up to the AGZ

Catalog ACZ-AGZB1-1

Selection example, SI Units

The selection procedure for Metric units is identical to English except that metric data and tables are used.

Remote Evaporator, Model BM

Inch-Pound (I-P) Units

Since the AGZ-BM units always include a specific remote evaporator, packaged chiller ratings are used. The ratings are based on leaving chilled water temperature and ambient air temperature with correction for the effect of the interconnecting refrigerant piping.

Table 15 through Table 18 cover the range of leaving evaporator water temperatures and outside ambient temperatures included under ARI 550/590-2003. The tables are based on a 10-degree F (5.5-degree C) temperature drop through the evaporator. Adjustment factors for applications having other than a 10-degree F (5.5-degree C) drop can be found in without glycol is 40°F (4C). For brine selections, see Ratings are based on a 0.0001 ft

other fouling factors, different Delta-Ts, or altitude correction factors see the catalog ratings, contact your local McQuay sales representative.

The length and configuration of the field installed interconnecting refrigerant piping will affect the system capacity. Derates based on equivalent length of line are given in

The steps for selecting an AGZ-BM are as follows:

1. Add 3% to the required cooling capacity (to approximate the effect of the correction factors to be

determined) and make a preliminary unit selection from

Table 9. The minimum leaving chilled water temperature setpoint

Table 7 or Table 8 for glycol adjustment factors.

x hr x F/Btu fouling factor in the evaporator at sea level operation. For

Table 9. For applications outside

Table 14.

Table 15 through Table 18.

2. Divide the required capacity by the appropriate capacity correction factors: glycols from

Table 7 or

Table 8, altitude, chilled water Delta T, or fouling factor from Table 9, and refrigerant piping derate

Table 14 as explained in step 3 below.

from

3. Determine the suction line size by first

summing the equivalent feet (from table 10) of all the fittings (use a sketch of the piping layout) and adding the sum of these fitting

Figure 6, Sample Piping Layout

losses to the actual linear feet of tubing. This will equal the total equivalent feet. (To use the equivalent feet table 10, start with the unit suction connection size from table 13 and correct if required.)

4. If the unit rated capacity in the tables is less

than the corrected required capacity, redo the selection with the next larger unit. In most cases the line size will be the unit connection size. If the selection is satisfactory, correct the power (if applicable) and determine water pressure drop.

18 Catalog ACZ-AGZB1-1

Selection example

English Units Given:

 20 tons required capacity  95°F ambient temperature  Cool 48 gpm from 54F to 44°F  0.0001 evaporator fouling factor  2,000 foot altitude

1. Add 3% to the required capacity for approximate derate: 20 x 1.03 = 20.6 tons. From

020B at the given conditions will produce 21.5 tons with a unit kW input of 29.0 and a unit EER of 8.9.

2. Determine derate factors:

Altitude correction from

Table 9:

0.998 Capacity, 1.009 Power

3. Piping correction: Assume 1 5/8” suction line based on line size in

Table 13.

(3) 90 Standard ells 3 x 4 ft =12 ft Plus actual linear feet 70 ft Total Equivalent Feet 82 ft This puts it between 1 5/8” and 2 1/8” line size. Check

Table 11 and find that 1 5/8” is maximum size for oil carry.

This means that the 1 5/8 riser will be satisfactory, but with a slightly higher pressure drop. The capacity correction factor from

Table 14 is between 0.97 and 0.98. Use 0.975.

4. The corrected capacity of the AGZ is: 21.5 tons x 0.998{altitude} x 0.98{piping} = 21.0 tons This satisfies

the 20 ton requirement.

5. Correct the unit power required: 29.0 kW x 1.009{altitude} = 29.3 kW.

6. Calculate the unit EER based on the correct capacity and power: EER = (21 tons x 12,000)/ (29.3 kW x 1,000) = 8.6

7. Determine the evaporator pressure drop. Enter the pressure drop curves, (

Figure 7) at 48 gpm and read up to

AGZ 020, read over to pressure drop of 5.9 ft.

Table 16 an AGZ-

Selection example, SI Units

The selection procedure for Metric units is identical to English except that metric data and tables are used.

Catalog ACZ-AGZB1-1

Application Adjustment Factors

Ethylene and Propylene Glycol Factors

AGZ units can operate with a leaving chilled fluid temperature range of 20°F (-6°C) to 60°F (10°C). A glycol solution is required when leaving chilled fluid temperature is below 40°F (4.6°C). The use of glycol will reduce the performance of the unit depending on concentration.

Altitude Correction Factors

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

Evaporator Temperature Drop Factors

Performance tables are based on a 10°F (5°C) temperature drop through the evaporator. Adjustment factors for applications with temperature ranges from 6°F to 16°F (3.3°C to 8.9°C) are in Table 3. Temperature drops outside this 6°F to 16°F (3.3°C to 8.9°C) range can affect the control system's capability to maintain acceptable control and are not recommended.

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

Table 7, Ethylene Glycol Factors

% E.G.

10 20 30 40 50

Freeze Point

°F °C

26 -3.3 0.998 0.998 1.036 1.097 18 -7.8 0.993 0.997 1.060 1.226

7 -13.9 0.987 0.995 1.092 1.369

-7 -21.7 0.980 0.992 1.132 1.557

-28 -33.3 0.973 0.991 1.182 1.791

Capacity Power Flow PD

Table 9.

Table 8, Propylene Glycol Factors

% P.G.

10 20 30 40 50

NOTE: Ethylene and propylene glycol ratings are outside the scope of ARI Standard 550/590-2003 certification program.

Freeze Point

°F °C

26 -3.3 0.995 0.997 1.016 1.100 19 -7.2 0.987 0.995 1.032 1.211

9 -12.8 0.978 0.992 1.057 1.380

-5 -20.6 0.964 0.987 1.092 1.703

-27 -32.8 0.952 0.983 1.140 2.251

Capacity Power Flow PD

20 Catalog ACZ-AGZB1-1

Fouling Factor

Performance tables are based on water with a fouling factor of

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

Table 9. Foreign matter in the chilled water system will adversely affect the heat transfer capability of the evaporator and could increase the pressure drop and reduce the water flow. Maintain proper water treatment to provide optimum unit operation.

Table 9, Capacity and Power Derates

Chilled Water

Altitude

Sea

Level

2000 feet

4000 feet

6000 feet

Delta T

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

6 3.3 0.978 0.993 0.975 0.991 0.963 0.987 0.940 0.980

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

6 3.3 0.977 1.001 0.973 1.000 0.961 0.996 0.938 0.989

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

6 3.3 0.973 1.011 0.970 1.010 0.957 1.006 0.935 0.998

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

6 3.3 0.969 1.021 0.966 1.020 0.954 1.016 0.931 1.008

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

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

)/0176.0(/0001.0

kWCmorBTUFhrft  per ARI 550/590-2003.

Fouling Factor

Table 10, Equivalent Feet for Fittings

Fitting Type 7/8 1 1/8 1 3/8 1 5/8 2 1/8 2 5/8 3 1/8 Elbows 90 Standard 90 Long Radius 90 Street 45 Standard 45 Street 180 Bend Tees Full Size Reducing Valves Globe Valve, Open Gate Valve, Open Angle Valve, Open

2.0 2.6 3.3 4.0 5.0 6.0 7.5

1.4 1.7 2.3 2.6 3.3 4.1 5.0

3.2 4.1 5.6 6.3 8.2 10 12

0.9 1.3 1.7 2.1 2.6 3.2 4.0

1.5 2.1 3.0 3.4 4.5 5.2 6.4

3.2 4.1 5.6 6.3 8.2 10 12

1.4 1.7 2.3 2.6 3.3 4.1 5.0

2.0 2.6 3.3 4.0 5.0 6.0 7.5

22 29 38 43 55 69 84

0.9 1.0 1.5 1.8 2.3 2.8 3.2

9.0 12 15 18 24 29 35

Table 11, Maximum Line Size (R-22,R-407C) For Oil Carry Up a Suction Riser

Unit Size AGZ AGZ AGZ AGZ AG Z AGZ AGZ

Catalog ACZ-AGZB1-1

010 013 017 020 025 029 034

Line Size 1 1/8 1 3/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8

Table 12, Recommended Liquid Line Size, R-22, R-407C

AGZ-BM

Unit Model

AGZ 01 AGZ 013 AGZ 016 AGZ 020 AGZ 025 AGZ 029 AGZ 034

Connection

Size

At Unit

7/8" 7/8 " 7/8 " 7/8 " 7/8 " 7/8 " 7/8" 7/8 " 7/8 " 7/8 " 7/8 " 7/8 " 7/8" 7/8 " 7/8 " 7/8 " 7/8 " 7/8 " 7/8" 7/8 " 7/8 " 7/8 " 7/8 " 7/8" 7/8 " 7/8 " 7/8 " 7/8" 7/8 " 7/8 " 7/8" 7/8 "

Up to Up to Up to Up to Up to

50 Equiv. Ft 75 Equiv. Ft 100 Equiv. Ft 125 Equiv. Ft 150 Equiv. Ft

Recommended Liquid Line Size

1 1/8 " 1 1/8 " 1 1/8 "

1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 "

Table 13, Recommended Suction Line Size, R-22, R-407C

Unit Model

AGZ 010AM AGZ 013AM AGZ 016AM AGZ 020AM AGZ 025AM AGZ 029AM AGZ 034AM

Note: For horizontal and vertical downflow only.

Connection

Size

At Unit

1 1/8” 1 1/8” 1 3/8" 1 5/8" 1 5/8" 1 5/8" 2 1/8" 2 1/8" 2 1/8" 2 1/8" 2 1/8" 2 1/8" 2 1/8" 2 1/8"

Up to Up to Up to Up to Up to

50 Equiv. Ft 75 Equiv. Ft 100 Equiv. Ft 125 Equiv. Ft 150 Equiv. Ft

1 1/8”

1 5/8" 1 5/8" 1 5/8" 1 5/8" 1 5/8" 1 5/8"

Recommended Suction Line Sizes

1 3/8" 1 3/8" 1 5/8" 1 5/8" 1 5/8" 1 5/8"

2 1/8" 2 1/8" 2 1/8"

2 1/8" 2 1/8" 2 1/8" 2 1/8"

2 5/8" 2 5/8" 2 5/8"

1 1/8 "

1 1/8 " 1 1/8 "

1 5/8" 1 5/8"

2 1/8" 2 1/8"

2 5/8"

Table 14, Refrigerant Piping Derates

Unit Capacity Loss Factor Due to Refrigerant Piping

Model At Unit 50 Equiv. Ft 75 Equiv. Ft 100 Equiv. Ft 125 Equiv. Ft 150 Equiv. Ft AGZ 010AM AGZ 013AM AGZ 016AM AGZ 020AM AGZ 025AM AGZ 029AM AGZ 034AM

1.0 0.98 0.98 0.97

1.0 0.98

1.0

1.0 0.99 0.98 0.97 0.96

1.0 0.99 0.98

0.99 0.98 0.98

0.98 0.97

0.98

0.98 0.98 0.97 0.96

0.98 0.98 0.97

0.99 0.99 0.98 0.97

0.98 0.97 0.97

0.98 0.97

0.99 0.98

0.98

22 Catalog ACZ-AGZB1-1

AGZ Chiller Performance Data

I-P Units

Table 15, Performance Data, R-22, I-P Units, 60 Hz

AGZ

NOTES:

1. Ratings in accordance with ARI Standard 550/590-2003. Bold ratings are at ARI standard conditions.

2. Ratings based on R-22, evap. fouling factor of 0.0001, evaporator water flow of 2.4 gpm/ton and sea level altitude.

3. KW input is for the entire unit including compressors, fan motors and control power.

4. Interpolation is allowed; extrapolation is not permitted. Consult McQuay for performance outside the cataloged ratings.

5. For LWT below 40°F please refer to Application Considerations section.

Fan &

Control

Unit

Power

Size

010 2.3

013 2.3

017 2.3

020 3.2

025 3.2

029 3.2

034 3.2

(kW)

LWT

(F)

Tons

40 10.0 10.3 11.6 9.6 11.2 10.2 9.2 12.2 9.1 8.8 13.4 7.9 8.3 14.6 6.8 42 10.4 10.4 12.0 10.0 11.3 10.6 9.6 12.3 9.4 9.1 13.4 8.1 8.6 14.7 7.0 44 10.8 10.5 12.3 10.4 11.3 11.0 46 11.3 10.6 12.8 10.8 11.5 11.3 10.4 12.5 10.0 9.9 13.6 8.7 9.4 14.9 7.5 48 11.7 10.7 13.1 11.2 11.6 11.7 10.8 12.6 10.3 10.3 13.7 9.0 9.7 15.0 7.7 50 12.1 10.8 13.4 11.6 11.7 12.0 11.2 12.7 10.6 10.7 13.8 9.3 10.1 15.1 8.0 40 13.9 14.3 11.7 13.3 15.5 10.3 12.7 16.8 9.0 12.1 18.4 7.9 11.4 20.0 6.9 42 14.4 14.4 12.1 13.8 15.6 10.6 13.2 16.9 9.4 12.6 18.5 8.2 11.8 20.2 7.0 44 14.9 14.5 12.4 14.3 15.7 11.0 46 15.6 14.7 12.7 14.8 15.9 11.2 14.2 17.2 9.9 13.5 18.8 8.6 12.8 20.5 7.5 48 16.1 14.8 13.1 15.5 16.0 11.6 14.7 17.4 10.1 14.0 19.0 8.9 13.2 20.6 7.7 50 16.7 14.9 13.5 16.0 16.1 11.9 15.2 17.5 10.4 14.5 19.1 9.1 13.7 20.8 7.9 40 16.1 16.3 11.9 15.4 17.8 10.4 14.7 19.5 9.1 13.9 21.1 7.9 13.1 23.1 6.8 42 16.7 16.5 12.2 16.0 18.0 10.7 15.2 19.6 9.3 14.4 21.3 8.1 13.6 23.3 7.0 44 17.3 16.6 12.5 16.6 18.1 11.0 46 18.0 16.8 12.9 17.2 18.3 11.3 16.3 19.8 9.9 15.5 21.7 8.6 14.6 23.6 7.4 48 18.6 17.0 13.2 17.8 18.5 11.6 16.9 20.0 10.1 16.0 21.8 8.8 15.1 23.8 7.6 50 19.2 17.1 13.5 18.4 18.6 11.9 17.5 20.2 10.4 16.6 22.0 9.0 15.6 24.0 7.8 40 21.0 21.5 11.7 20.1 23.3 10.3 19.2 25.3 9.1 18.2 27.6 7.9 17.1 30.0 6.8 42 21.7 21.7 12.0 20.8 23.5 10.6 19.9 25.5 9.3 18.8 27.8 8.1 17.7 30.3 7.0 44 22.5 21.9 12.3 21.6 23.7 10.9 46 23.3 22.1 12.7 22.3 23.9 11.2 21.3 26.0 9.9 20.2 28.3 8.6 19.1 30.7 7.5 48 24.1 22.3 13.0 23.1 24.1 11.5 22.1 26.2 10.1 20.9 28.5 8.8 19.7 31.0 7.6 50 25.0 22.5 13.4 23.9 24.3 11.8 22.8 26.5 10.4 21.7 28.7 9.1 20.4 31.2 7.8 40 23.1 23.7 11.7 22.2 25.7 10.4 21.1 27.9 9.1 19.9 30.3 7.9 18.7 33.0 6.8 42 24.0 24.0 12.0 23.0 25.9 10.7 21.9 28.1 9.4 20.7 30.6 8.1 19.4 33.3 7.0 44 24.9 24.2 12.4 23.8 26.2 10.9 46 26.0 24.2 12.9 24.7 26.5 11.2 23.5 28.7 9.8 22.2 31.2 8.5 20.9 33.9 7.4 48 26.7 24.8 12.9 25.6 26.7 11.5 24.3 29.0 10.1 23.0 31.5 8.8 21.6 34.2 7.6 50 27.7 25.1 13.3 26.5 27.0 11.8 25.2 29.3 10.3 23.8 31.8 9.0 22.4 34.5 7.8 40 28.2 28.4 11.9 27.0 31.1 10.4 25.8 34.1 9.1 24.5 37.2 7.9 23.1 40.7 6.8 42 29.3 28.7 12.3 28.0 31.4 10.7 26.8 34.4 9.3 25.4 37.6 8.1 23.9 41.1 7.0 44 30.4 29.0 12.6 29.1 31.7 11.0 46 31.5 29.3 12.9 30.1 32.0 11.3 28.7 35.0 9.9 27.2 38.3 8.5 25.7 41.9 7.4 48 32.6 29.7 13.2 31.2 32.3 11.6 29.7 35.4 10.1 28.2 38.6 8.8 26.7 42.2 7.6 50 33.7 30.0 13.5 32.2 32.7 11.8 30.8 35.7 10.3 29.2 39.0 9.0 27.5 42.6 7.8 40 34.9 35.0 12.0 33.4 38.2 10.5 31.7 41.6 9.1 29.9 45.2 7.9 27.9 49.1 6.8 42 36.1 35.4 12.2 34.6 38.6 10.8 32.9 42.1 9.4 31.0 45.7 8.1 28.9 49.6 7.0 44 37.4 35.9 12.5 35.8 39.0 11.0 46 38.8 36.3 12.8 37.1 39.5 11.3 35.2 43.0 9.8 33.2 46.7 8.5 31.1 50.7 7.4 48 40.1 36.7 13.1 38.3 39.9 11.5 36.4 43.5 10.0 34.4 47.3 8.7 32.2 51.3 7.5 50 41.5 37.2 13.4 39.6 40.4 11.8 37.7 44.0 10.3 35.6 47.8 8.9 33.3 51.8 7.7

75 85 95 105 115

Unit

PWR

Unit

kWi

EER

Tons

PWR

kWi

Ambient Air Temperature (F)

Unit

PWR

EER

Tons

10.0 12.4 9.7

13.7 17.1 9.6

15.8 19.8 9.6

20.6 25.8 9.6

22.7 28.4 9.6

27.7 34.7 9.6

34.0 42.5 9.6

kWi

Unit

EER

Unit

PWR

Unit

Tons

kWi

9.5 13.5 8.4 9.0 14.8 7.3

13.0 18.7 8.3 12.3 20.3 7.2

14.9 21.5 8.3 14.1 23.5 7.2

19.5 28.0 8.4 18.4 30.5 7.2

21.4 30.9 8.3 20.1 33.6 7.2

26.3 37.9 8.3 24.8 41.5 7.2

32.1 46.2 8.3 30.0 50.2 7.2

EER

Unit

Tons

PWR

kWi

Unit

EER

Catalog ACZ-AGZB1-1

Table 16, Performance Data, R-407C, I-P, 60 Hz

AGZ Unit Size

010 2.3

013 2.3

017 2.3

020 3.2

025 3.2

029 3.2

034 3.2

NOTES:

1. Ratings based on R-407C, evaporator fouling factor of 0.0001, evaporator water flow of 2.4 gpm/ton and sea level altitude.

2. KW input is for the entire unit including compressors, fan motors and control power.

3. Interpolation is allowed; extrapolation is not permitted. Consult McQuay for performance outside the cataloged ratings.

4. For LWT below 40°F please refer to Application Considerations.

5. Use anti-freeze below 42.0F.

Fan &

Control

Power

(kW)

LWT

(F)

Tons

42 10.2 10.8 11.4 9.8 11.7 10.1 9.4 12.8 8.8 9.0 14.1 7.7 8.5 15.4 6.6 44 10.7 10.9 11.8 10.2 11.8 10.4 46 11.1 11.0 12.2 10.7 11.9 10.8 10.2 13.0 9.4 9.7 14.3 8.2 9.3 15.7 7.1 48 11.5 11.1 12.5 11.1 12.0 11.1 10.6 13.1 9.7 10.1 14.4 8.4 9.6 15.8 7.3 50 12.0 11.1 13.0 11.5 12.1 11.4 11.0 13.2 10.0 10.5 14.5 8.7 10.0 15.9 7.5 42 14.0 14.7 11.5 13.5 16.0 10.1 12.9 17.5 8.9 12.3 19.2 7.7 11.7 21.0 6.7 44 14.6 14.9 11.8 14.0 16.2 10.4 46 15.2 14.9 12.2 14.5 16.3 10.7 13.9 17.8 9.4 13.3 19.5 8.2 12.6 21.4 7.1 48 15.7 15.1 12.4 15.2 16.5 11.0 14.4 18.0 9.6 13.7 19.8 8.3 13.1 21.6 7.3 50 16.3 15.2 12.8 15.7 16.6 11.3 15.0 18.1 9.9 14.2 19.9 8.6 13.5 21.7 7.5 42 16.2 17.0 11.4 15.6 18.5 10.1 14.9 20.2 8.8 14.2 22.1 7.7 13.5 24.3 6.7 44 16.9 17.1 11.8 16.2 18.7 10.4 46 17.4 17.2 12.1 16.7 18.7 10.7 16.0 20.5 9.3 15.3 22.5 8.1 14.5 24.6 7.1 48 18.0 17.4 12.4 17.4 18.9 11.0 16.6 20.7 9.6 15.8 22.7 8.3 15.0 24.9 7.2 50 18.6 17.0 13.1 17.9 18.5 11.6 17.2 20.2 10.2 16.4 22.1 8.9 15.6 24.3 7.7 42 21.2 22.2 11.5 20.4 24.2 10.1 19.5 26.4 8.9 18.6 28.9 7.7 17.7 31.7 6.7 44 22.0 22.4 11.8 21.1 24.4 10.4 46 22.7 22.5 12.1 21.9 24.5 10.7 20.9 26.8 9.3 19.9 29.4 8.1 18.9 32.2 7.0 48 23.6 22.8 12.4 22.7 24.8 11.0 21.7 27.1 9.6 20.7 29.7 8.4 19.7 32.6 7.2 50 24.4 23.1 12.7 23.4 25.1 11.2 22.4 27.5 9.8 21.4 30.1 8.5 20.3 33.0 7.4 42 23.3 24.4 11.5 22.4 26.5 10.2 21.5 29.0 8.9 20.5 31.7 7.7 19.5 34.9 6.7 44 24.2 24.6 11.8 23.2 26.8 10.4 46 25.1 25.0 12.1 24.1 27.1 10.7 23.0 29.6 9.3 21.9 32.5 8.1 20.9 35.6 7.0 48 25.9 25.2 12.4 24.9 27.5 10.9 23.8 30.0 9.5 22.7 32.8 8.3 21.6 36.0 7.2 50 27.0 25.5 12.7 26.0 27.7 11.3 24.8 30.3 9.8 23.6 33.2 8.5 22.4 36.3 7.4 42 28.5 29.9 11.5 27.4 32.4 10.1 26.2 35.5 8.9 25.0 38.7 7.8 23.8 42.6 6.7 44 29.6 30.1 11.8 28.4 32.8 10.4 46 30.7 30.5 12.1 29.4 33.2 10.6 28.1 36.2 9.3 26.9 39.6 8.1 25.5 43.5 7.0 48 31.6 30.7 12.4 30.5 33.5 10.9 29.1 36.6 9.5 27.8 40.0 8.3 26.4 44.0 7.2 50 32.7 31.1 12.6 31.4 33.8 11.2 30.1 37.0 9.8 28.7 40.5 8.5 27.3 44.4 7.4 42 35.1 37.4 11.3 33.7 40.6 10.0 32.2 44.4 8.7 30.7 48.6 7.6 29.2 53.4 6.6 44 36.3 37.7 11.5 34.9 41.1 10.2 46 37.5 38.2 11.8 36.0 41.5 10.4 34.4 45.4 9.1 32.8 49.7 7.9 31.1 54.6 6.9 48 38.8 38.5 12.1 37.3 42.0 10.6 35.6 45.9 9.3 33.9 50.2 8.1 32.2 55.2 7.0 50 40.1 39.0 12.4 38.6 42.3 10.9 36.9 46.4 9.5 35.2 50.8 8.3 33.4 55.7 7.2

75 85 95 105 115

Unit

PWR

Unit

kWi

EER

Tons

Ambient Air Temperature (F)

PWR

Unit

PWR

kWi

EER

Tons

kWi

9.8 12.9 9.1

13.4 17.7 9.1

15.5 20.4 9.1

20.2 26.6 9.1

22.2 29.3 9.1

27.2 35.8 9.1

33.3 44.9 8.9

Unit

PWR

Unit

EER

Tons

kWi

EER

Tons

9.4 14.2 8.0 8.9 15.5 6.9

12.8 19.4 7.9 12.2 21.2 6.9

14.8 22.3 8.0 14.0 24.5 6.9

19.3 29.2 7.9 18.3 32.0 6.9

21.3 32.2 7.9 20.2 35.2 6.9

25.9 39.2 7.9 24.7 43.0 6.9

31.7 49.2 7.7 30.2 53.9 6.7

PWR

kWi

Unit

EER

24 Catalog ACZ-AGZB1-1

SI Units

Table 17, Performance Data, R-22, SI Units, 60 Hz

AGZ

Fan &

Unit

Control

Size

Power

(kW)

010 2.3

013 2.3

017 2.3

020 3.2

025 3.2

029 3.2

034 3.2

NOTES:

1. Ratings based on R-22, evaporator fouling factor of 0.0176, 5.6C evaporator delta-T, and sea level altitude.

2. KW input is for the entire unit including compressors, fan motors and control power.

3. Interpolation is allowed; extrapolation is not permitted. Consult McQuay for performance outside the cataloged ratings.

4. For LWT below 5.0°C please refer to Application Considerations.

5. Use anti-freeze below 6.0C.

LWT

(C)

5.0 35.4 10.4 3.4 34.1 11.3 3.0 32.6 12.2 2.7 31.2 13.2 2.4 29.7 14.3 2.1

6.0 36.6 10.5 3.5 35.3 11.4 3.1 33.9 12.3 2.8 32.4 13.3 2.4 30.8 14.4 2.1

7.0 37.9 10.6 3.6 36.6 11.5 3.2

8.0 39.3 10.7 3.7 37.9 11.6 3.3 36.4 12.4 2.9 34.9 13.4 2.6 33.1 14.6 2.3

9.0 40.6 10.9 3.8 39.2 11.6 3.4 37.7 12.5 3.0 36.1 13.5 2.7 34.4 14.7 2.3

10.0 42.0 10.9 3.8 40.5 11.7 3.5 39.0 12.6 3.1 37.3 13.6 2.7 35.6 14.8 2.4

5.0 48.8 14.6 3.4 46.9 15.7 3.0 45.0 16.9 2.7 43.1 18.3 2.4 41.0 19.8 2.1

6.0 50.4 14.7 3.4 48.5 15.8 3.1 46.6 17.0 2.7 44.5 18.4 2.4 42.3 19.9 2.1

7.0 52.2 14.8 3.5 50.1 15.9 3.2

8.0 53.9 14.9 3.6 51.9 16.0 3.2 49.8 17.2 2.9 47.6 18.7 2.6 45.2 20.2 2.2

9.0 55.6 15.1 3.7 53.6 16.1 3.3 51.4 17.4 3.0 49.2 18.8 2.6 46.7 20.3 2.3

10.0 57.5 15.2 3.8 55.3 16.3 3.4 53.2 17.5 3.0 50.8 19.0 2.7 48.2 20.4 2.4

5.0 56.8 16.7 3.4 54.5 18.1 3.0 52.1 19.5 2.7 49.7 21.1 2.4 47.2 22.8 2.1

6.0 58.6 16.8 3.5 56.3 18.2 3.1 53.8 19.7 2.8 51.3 21.2 2.4 48.7 22.9 2.1

7.0 60.5 17.0 3.6 58.1 18.3 3.2

8.0 62.5 17.1 3.7 59.9 18.5 3.3 57.3 19.9 2.9 54.7 21.5 2.5 51.9 23.3 2.2

9.0 64.3 17.3 3.8 61.8 18.6 3.3 59.1 20.0 3.0 56.4 21.7 2.6 53.5 23.5 2.3

10.0 66.3 17.4 3.8 63.6 18.8 3.4 60.9 20.2 3.0 58.1 21.8 2.7 55.2 23.6 2.3

5.0 73.9 21.8 3.4 70.9 23.5 3.0 67.9 25.3 2.7 64.7 27.4 2.4 61.3 29.6 2.1

6.0 76.3 22.0 3.5 73.3 23.7 3.1 70.2 25.5 2.8 66.9 27.6 2.4 63.4 29.8 2.1

7.0 78.7 22.2 3.5 75.7 23.8 3.2

8.0 81.3 22.4 3.6 78.1 24.0 3.2 74.9 26.0 2.9 71.3 28.0 2.6 67.6 30.2 2.2

9.0 83.8 22.6 3.7 80.6 24.2 3.3 77.2 26.2 3.0 73.7 28.2 2.6 69.8 30.4 2.3

10.0 86.5 22.8 3.8 83.1 24.4 3.4 79.6 26.4 3.0 76.0 28.4 2.7 72.0 30.6 2.4

5.0 81.4 24.2 3.4 78.3 25.9 3.0 74.8 27.9 2.7 71.1 30.1 2.4 67.2 32.5 2.1

6.0 84.1 24.4 3.5 80.8 26.2 3.1 77.3 28.2 2.7 73.5 30.4 2.4 69.4 32.8 2.1

7.0 87.1 24.5 3.6 83.4 26.4 3.2

8.0 90.1 24.7 3.7 86.2 26.6 3.2 82.4 28.6 2.9 78.4 30.9 2.5 74.2 33.3 2.2

9.0 92.6 25.1 3.7 88.9 26.9 3.3 85.1 28.9 2.9 80.9 31.1 2.6 76.6 33.6 2.3

10.0 95.6 25.4 3.8 91.7 27.1 3.4 87.8 29.2 3.0 83.5 31.4 2.7 79.0 33.9 2.3

5.0 99.4 29.0 3.4 95.5 31.4 3.0 91.4 34.1 2.7 87.3 37.0 2.4 82.9 40.0 2.1

6.0 102.7 29.3 3.5 98.6 31.7 3.1 94.4 34.4 2.7 90.2 37.3 2.4 85.6 40.4 2.1

7.0 106.0 29.6 3.6 101.8 32.0 3.2

8.0 109.5 29.8 3.7 105.1 32.3 3.3 100.6 35.0 2.9 96.1 37.9 2.5 91.2 41.0 2.2

9.0 112.9 30.1 3.8 108.5 32.6 3.3 103.9 35.3 2.9 99.1 38.2 2.6 94.1 41.4 2.3

10.0 116.5 30.4 3.8 111.9 32.9 3.4 107.1 35.6 3.0 102.2 38.6 2.6 97.1 41.7 2.3

5.0 122.4 36.5 3.4 117.5 39.3 3.0 112.3 42.5 2.6 106.5 45.8 2.3 100.3 49.4 2.0

6.0 126.4 36.8 3.4 121.4 39.7 3.1 115.9 42.9 2.7 110.0 46.4 2.4 103.6 49.9 2.1

7.0 130.5 37.2 3.5 125.2 40.2 3.1

8.0 134.5 37.6 3.6 129.2 40.6 3.2 123.3 43.8 2.8 117.1 47.3 2.5 110.4 50.8 2.2

9.0 138.8 38.0 3.7 133.1 41.0 3.3 127.2 44.2 2.9 120.8 47.7 2.5 113.8 51.3 2.2

10.0 143.0 38.4 3.7 137.2 41.5 3.3 131.1 44.7 2.9 124.4 48.2 2.6 117.4 51.8 2.3

25 30 35 40 45

Unit

PWR

Unit

PWR

kWi

COP

kWi

Ambient Air Temperature (C)

Unit

PWR

Unit

COP

kWi

COP

35.2 12.4 2.8

48.2 17.1 2.8

55.6 19.8 2.8

72.5 25.8 2.8

79.8 28.4 2.8

97.5 34.7 2.8

119.6 43.4 2.8

Unit

PWR

Unit

kWi

COP

33.7 13.4 2.5 32.0 14.5 2.2

46.0 18.6 2.5 43.7 20.0 2.2

53.0 21.4 2.5 50.2 23.1 2.2

69.1 27.8 2.5 65.5 30.0 2.2

75.9 30.6 2.5 71.8 33.0 2.2

93.1 37.6 2.5 88.4 40.7 2.2

113.5 46.8 2.4 106.9 50.3 2.1

PWR

kWi

Unit

COP

Catalog ACZ-AGZB1-1

Table 18, Performance Data, R-407C, SI Units, 60 Hz

Fan &

AGZ

Control

Unit

Power

Size

(kW)

010 2.3

013 2.3

017 2.3

020 3.2

025 3.2

029 3.2

034 3.2

NOTES:

1. Ratings based on R-407C, evaporator fouling factor of 0.0176, 5.6C evaporator delta-T, and sea level altitude.

2. KW input is for the entire unit including compressors, fan motors and control power.

3. Interpolation is allowed; extrapolation is not permitted. Consult McQuay for performance outside the cataloged ratings.

4. For LWT below 5.0°C please refer to Application Considerations.

LWT

(C)

6.0 35.9 10.8 3.3 34.7 11.7 3.0 33.2 12.8 2.6 31.9 14.1 2.3 30.6 15.4 2.0

7.0 37.3 10.9 3.4 35.9 11.8 3.0

8.0 38.7 11.0 3.5 37.4 11.9 3.1 35.8 13.0 2.7 34.4 14.3 2.4 32.9 15.7 2.1

9.0 40.0 11.1 3.6 38.7 12.0 3.2 37.2 13.1 2.8 35.6 14.4 2.5 34.0 15.8 2.1

10.0 41.5 11.1 3.7 40.1 12.1 3.3 38.4 13.2 2.9 36.8 14.5 2.5 35.3 15.9 2.2

6.0 49.2 14.7 3.3 47.5 16.0 3.0 45.6 17.5 2.6 43.8 19.2 2.3 41.9 21.0 2.0

7.0 50.9 14.9 3.4 49.1 16.2 3.0

8.0 52.8 14.9 3.5 50.9 16.3 3.1 48.8 17.8 2.7 46.8 19.5 2.4 44.8 21.4 2.1

9.0 54.4 15.1 3.6 52.6 16.5 3.2 50.5 18.0 2.8 48.3 19.8 2.4 46.2 21.6 2.1

10.0 56.2 15.2 3.7 54.3 16.6 3.3 52.1 18.1 2.9 49.9 19.9 2.5 47.7 21.7 2.2

6.0 56.7 17.0 3.3 54.8 18.5 3.0 52.5 20.2 2.6 50.5 22.1 2.3 48.3 24.3 2.0

7.0 58.8 17.1 3.4 56.6 18.7 3.0

8.0 60.4 17.2 3.5 58.4 18.7 3.1 55.9 20.5 2.7 53.7 22.5 2.4 51.4 24.6 2.1

9.0 62.3 17.4 3.6 60.3 18.9 3.2 58.0 20.7 2.8 55.4 22.7 2.4 53.0 24.9 2.1

10.0 64.4 17.0 3.8 62.3 18.5 3.4 59.7 20.2 3.0 57.3 22.1 2.6 54.8 24.3 2.3

6.0 74.4 22.2 3.4 71.8 24.2 3.0 68.8 26.4 2.6 66.0 28.9 2.3 63.3 31.7 2.0

7.0 76.6 22.4 3.4 73.9 24.4 3.0

8.0 79.1 22.5 3.5 76.3 24.5 3.1 73.3 26.8 2.7 70.3 29.4 2.4 67.2 32.2 2.1

9.0 81.6 22.8 3.6 79.0 24.8 3.2 76.0 27.1 2.8 72.7 29.7 2.4 69.4 32.6 2.1

10.0 84.2 23.0 3.7 81.3 25.1 3.2 78.0 27.5 2.8 74.8 30.1 2.5 71.6 33.0 2.2

6.0 81.8 24.4 3.3 78.9 26.5 3.0 75.7 29.0 2.6 72.8 31.7 2.3 69.6 34.9 2.0

7.0 84.4 24.6 3.4 81.4 26.8 3.0

8.0 87.2 25.0 3.5 84.2 27.1 3.1 80.8 29.6 2.7 77.6 32.5 2.4 74.1 35.6 2.1

9.0 89.7 25.2 3.6 86.8 27.5 3.2 83.4 30.0 2.8 79.8 32.8 2.4 76.3 36.0 2.1

10.0 93.3 25.5 3.7 90.1 27.7 3.3 86.5 30.3 2.9 82.8 33.2 2.5 79.3 36.3 2.2

6.0 99.9 29.8 3.4 96.5 32.6 3.0 92.5 35.5 2.6 88.9 38.9 2.3 85.0 42.7 2.0

7.0 103.2 30.1 3.4 99.4 32.8 3.0

8.0 106.6 30.4 3.5 102.9 33.2 3.1 98.7 36.2 2.7 94.7 39.7 2.4 90.7 43.5 2.1

9.0 109.6 30.8 3.6 106.1 33.6 3.2 102.0 36.7 2.8 97.6 40.1 2.4 93.2 44.0 2.1

10.0 113.1 31.0 3.6 109.3 33.8 3.2 104.8 37.0 2.8 100.5 40.4 2.5 96.2 44.4 2.2

6.0 122.9 37.9 3.2 118.6 41.3 2.9 113.8 45.1 2.5 109.3 49.4 2.2 104.6 54.2 1.9

7.0 126.5 37.7 3.4 121.9 41.1 3.0

8.0 130.2 38.7 3.4 125.7 42.2 3.0 120.6 46.1 2.6 115.7 50.5 2.3 110.7 55.4 2.0

9.0 133.9 39.2 3.4 129.6 42.6 3.0 124.6 46.6 2.7 119.1 51.0 2.3 113.9 56.0 2.0

10.0 138.6 39.6 3.5 133.9 43.1 3.1 128.4 47.1 2.7 123.2 51.6 2.4 117.9 56.6 2.1

25 30 35 40 45

Unit

PWR

Unit

PWR

kWi

COP

kWi

Ambient Air Temperature (C)

Unit

PWR

Unit

COP

kWi

COP

34.5 12.9 2.7

47.2 17.7 2.7

54.5 20.4 2.7

71.0 26.6 2.7

78.2 29.3 2.7

95.6 35.8 2.7

117.2 44.9 2.6

Unit

PWR

Unit

kWi

COP

33.2 14.2 2.3 31.7 15.5 2.0

45.4 19.4 2.3 43.4 21.2 2.0

52.3 22.3 2.3 50.0 24.5 2.0

68.3 29.2 2.3 65.3 32.0 2.0

75.2 32.2 2.3 71.9 35.2 2.0

91.9 39.2 2.3 87.9 43.0 2.0

112.6 49.2 2.3 107.6 53.9 2.0

PWR

kWi

Unit

COP

26 Catalog ACZ-AGZB1-1

AGZ Part Load Data

Table 19, R-22 and R-407C, IP Units, 60Hz

R-22

AGZ Unit

% Load

Size

100.0 10.0 12.4 9.7 100.0 9.8 12.9 9.1

010

100.0 13.7 17.1 9.6 100.0 13.4 17.7 9.1

013

100.0 15.8 19.8 9.6 100.0 15.5 20.4 9.1

017

100.0 20.6 25.8 9.6 100.0 20.2 26.6 9.1

020

100.0 22.7 28.4 9.6 100.0 22.2 29.3 9.1

025

100.0 27.7 34.7 9.6 100.0 27.2 35.8 9.1

029

100.0 34.0 43.4 9.4 100.0 33.3 44.9 8.9

034

NOTE: Certified according to ARI Standard 550/590-2003.

Capacity

Tons

75.0 7.5 7.6 11.9 75.0 7.4 7.4 11.9

50.0 5.0 4.3 14.0 50.0 4.9 4.2 14.0

25.0 2.5 2.0 15.0

75.0 10.3 10.3 12.0 75.0 10.1 10.1 12.0

50.0 6.9 5.8 14.1 50.0 6.7 5.7 14.1

25.0 3.4 2.7 15.1

75.0 11.9 11.8 12.1 75.0 11.6 11.5 12.1

50.0 7.9 6.6 14.3 50.0 7.7 6.5 14.3

25.0 4.0 3.1 15.3

75.0 15.5 14.8 12.5 75.0 15.1 14.5 12.5

50.0 10.3 8.2 15.0 50.0 10.1 8.1 15.0

25.0 5.2 3.9 16.0

75.0 17.0 16.3 12.5 75.0 16.7 16.0 12.5

50.0 11.4 9.1 15.0 50.0 11.1 8.9 15.0

25.0 5.7 4.3 16.0

75.0 20.8 20.1 12.4 75.0 20.4 19.7 12.4

50.0 13.9 11.5 14.5 50.0 13.6 11.2 14.5

25.0 6.9 5.4 15.5

75.0 25.5 25.1 12.2 75.0 25.0 24.6 12.2

50.0 17.0 14.2 14.4 50.0 16.7 13.9 14.4

25.0 8.5 6.7 15.2

Power

kWi

EER IPLV

13.2

13.3

13.4

14.0

13.7

13.5

AGZ Unit Size

010

013

017

020

025

029

034

R-407C

% Load

Capacity

Tons

25.0 2.5 2.0 15.0

25.0 3.4 2.7 15.1

25.0 3.9 3.0 15.3

25.0 5.0 3.8 16.0

25.0 5.6 4.2 16.0

25.0 6.8 5.3 15.5

25.0 8.3 6.6 15.2

Power

kWi

EER IPLV

13.2

13.3

13.4

14.0

13.7

13.5

Catalog ACZ-AGZB1-1

Pressure Drop Curves

Figure 7, AGZ 010B – 034B, Evaporator Pressure Drops

AGZ 010

GZ 020

GZ 025

GZ 029

GZ 034

AGZ 017

AGZ 013

AGZ Unit

Model

AGZ 010B AGZ 013B AGZ 017B AGZ 020B AGZ 025B AGZ 029B AGZ 034B

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

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

15 2.3 0.9 6.9 24 5.7 1.5 17.0 39 14.8 2.5 44.1 20 1.6 1.3 4.8 32 4.0 2.0 11.9 53 10.5 3.3 31.3 24 1.7 1.5 5.1 38 4.3 2.4 12.8 64 11.2 4.0 33.4 31 2.6 1.9 7.7 49 6.2 3.1 18.5 82 16.3 5.2 48.6 34 2.0 2.2 6.0 55 4.8 3.5 14.3 91 12.7 5.7 37.8 43 2.2 2.7 6.6 68 5.3 4.3 15.8 113 14.1 7.1 42.0 51 2.2 3.2 6.6 82 5.3 5.2 15.8 136 14.2 8.6 42.3

Minimum Nominal Maximum

28 Catalog ACZ-AGZB1-1

Sound Data

AGZ/ACZ Units

Table 20, Sound Pressure, w/o Sound Insulation

Model

-- 010B 010B 013B 013B 016B 017B 020B 020B 025B 025B 028B 029B 033B 034B 039B

Note: Data at:

1. 30 feet (9m) from side of unit.

2. Q=2, unit on a flat roof or ground with no adjacent wall.

3. Octave band readings are flat dB, overall is “A” weighted.

ACZ Unit

Model

63 125 250 500 1000 2000 4000 8000

52 52 52 54 48 46 44 42 55 52 52 52 54 48 46 44 42 55 53 54 54 55 48 47 45 42 56 58 56 55 53 52 50 48 48 57 58 57 56 54 52 50 48 48 58 58 58 56 55 52 50 48 48 58 59 59 61 58 54 53 51 50 61 61 62 63 59 55 54 53 51 63

Table 21, Sound Power, w/o Sound Insulation

Model

-- 010B 010B 013B 013B 016B 017B 020B 020B 025B 025B 028B 029B 033B 034B 039B

Note: Octave band readings are flat dB, overall is “A” weighted.

ACZ Unit

Model

Octave Band at Center Frequency (per ARI Standard 370) AGZ Unit

63 125 250 500 1000 2000 4000 8000

79 79 79 81 75 73 71 69 82 79 79 79 81 75 73 71 69 82 80 81 81 82 75 74 72 69 83 85 83 82 80 79 77 75 75 84 85 84 83 81 79 77 75 75 85 85 85 83 82 79 77 75 75 85 86 86 88 85 81 80 78 77 88 88 89 90 86 82 81 80 78 90

Octave Band at Center Frequency AGZ Unit

Overall

A-Weighted

Overall

A-Weighted

Table 22, Sound Pressure w/ Sound Insulation

Model

-- 010B 010B 013B 013B 016B 017B 020B 020B 025B 025B 028B 029B 033B 034B 039B

Notes: Data at:

1. 30 feet (9m) from side of unit.

2. Q=2, unit on a flat roof or ground with no adjacent wall.

3. Octave band readings are flat dB, overall is “A” weighted.

ACZ Unit

Model

63 125 250 500 1000 2000 4000 8000 A-Weighted

n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a

52 53 51 53 47 45 43 41 54 52 53 53 54 47 45 44 42 55 53 54 54 55 48 46 45 43 56 54 54 54 55 48 46 45 43 56 54 54 55 56 49 47 46 43 57 55 55 56 57 50 48 47 43 58

Octave Band at Center Frequency Overall AGZ Unit

Table 23, Sound Power w/ Sound insulation

Model

-- 010B 010B 013B 013B 016B 017B 020B 020B 025B 025B 028B 029B 033B 034B 039B

Note: Octave band readings are flat dB, overall is “A” weighted.

ACZ Unit

Model

Octave Band at Center Frequency (per ARI Standard 370) Overall AGZ Unit

63 125 250 500 1000 2000 4000 8000 A-Weighted

n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a

79 80 78 80 74 72 70 68 81 79 80 80 81 74 72 71 69 82 80 81 81 82 75 73 72 70 83 81 81 81 82 75 73 72 70 83 81 81 82 83 76 74 73 70 84 82 82 83 84 77 75 74 70 85

Catalog ACZ-AGZB1-1

Quiet Operation

Sound levels can be as important as unit cost and efficiency, and must be addressed before the start of any development program. Efforts by McQuay Design Engineers to design units that are sensitive to the sound requirements of the market, combined with inherently quiet scroll compressors, have paid off.

Background Information

Sound is a vibration in an elastic medium and is essentially a pressure and particle displacement phenomena. A vibrating body produces compression waves, and as the waves are emitted from the vibrating body, molecules are ultimately compressed. These values are transmitted through gas, liquid, solidanything which is elastic or viscous.

The sound data provided in this section is presented with both sound pressure and sound power levels. Sound power is the total sound energy radiated by a source per unit of time integrated over the surface through which the sound is radiated. Sound power is a calculated quantity and cannot be measured directly like sound pressure. Sound power is not dependent on the surrounding environment or distance from the source, as is sound pressure.

Sound pressure varies with the distance from the source and is dependent on its surroundings. For example, a brick wall located 10 feet from a unit will affect the sound pressure measurements differently than a brick wall at 20 feet. Sound pressure is measured in decibels (dB), which is a dimensionless ratio (on a logarithmic scale) between measured sound pressure and a reference sound pressure level.

Sound Pressure Levels - Full Load

All sound pressure tables give the overall "A" weighted sound pressure levels which are considered typical of what can be measured in a free field with a hand held sound meter, in the absence of any nearby reflective surfaces. The sound pressure levels are measured at 30 feet (10 meters) from the side of the unit at 100% unit load and ARI conditions. 95°F (35°C) ambient air temperature and 50F suction temperature.

Sound Power Levels

Acoustical consultants can require sound power octave band data to perform a detailed acoustical analysis. The tables present sound power levels per ARI Standard 370, “Sound Rating of Large Outdoor Refrigerating and Air Conditioning Equipment”. These standards were developed to establish uniform methods of determining the sound power radiated by large outdoor and indoor equipment. The aforementioned methods are based on providing sound power levels by octave band and the overall ‘A’ weighted value. Measurements are taken over a prescribed area around the unit and the data is mathematically calculated to give the sound power, dB. Sound power can be thought of as basic sound level emanating from the unit without consideration of distance or obstructions.

Sound Reduction due to Distance from the Unit

The distance between a source of sound and the location of the sound measurement plays an important role in minimizing sound problems. The equation below can be used to calculate the sound pressure level at any distance if the sound power is known. Results for typical distances are tabulated in determining the effect of distance is to work from sound pressure only. “Q”, the directionality factor, is a dimensionless number that compensates for the type of sound reflection from the source. For example, a unit sitting on a flat roof or ground with no other reflective surfaces or attenuation due to grass, snow, etc., between source and receiver: Q=2.

Table 24. Another way of

30 Catalog ACZ-AGZB1-1

Figure 8, "Q" Definition, Plan View, Unit Located in Center

Uniform Spherical Radiation

Q=1 no reflecting surface

Uniform Hemispherical Radiation

Q=2 single reflecting surface

Uniform Radiation over ¼ of sphere

Q=4 two reflecting surfaces

Sound pressure can be calculated at any distance from the unit if the sound power is known. Lp=Lw-(20 log r) + (10 log Q) - .5

Lp = sound pressure r = distance from unit in feet Lw = sound power Q = directionality factor With Q=1

, Unit suspended in space (theoretical condition), the equation simplifies to:

Lp = Lw – (20)(log r) –0.5 With Q=2

, for a unit sitting on a flat roof or ground with no adjacent vertical wall as a reflective surface, the equation simplifies to: Lp = Lw – (20)(log r) + 2.5

With Q=4

for a unit sitting on a flat roof or ground with one adjacent vertical wall as a reflective surface, the equation simplifies to: Lp = Lw – (20)(log r) + 5.5

The equations are reduced to table form in

Table 24 for various distances and the two most usual cases of

“Q” type of location.

Table 24, dB Conversion of Sound Power to Pressure for Distance

Distance from Sound

Source

ft. (m)

30 (9) 27.1 24.0 50 (15) 31.6 28.5 75 (23) 35.1 32.0

100 (30) 37.6 34.5 150 (46) 41.1 38.0 200 (61) 43.6 40.5 300 (91) 47.6 44.0

dB Reduction from Sound Power at the Source to

Sound Pressure at Referenced Distance

Q=2 Q=4

Catalog ACZ-AGZB1-1

Figure 9, Sound Pressure Attenuation Due to Distance from Unit

Sound Pressure Reduction - Low Ambient Conditions

Unit operation at a lower ambient temperature than 95°F (35C) will also result in lower sound pressure levels. The sound pressure level will decrease 1 dBA for ambient temperatures between 85F and 94°F (29.4C and 34.4C), 2 dBA for ambient temperatures between 75F and 84°F (23.9C and 28.9C), and 3 dBA for ambient temperatures between 65F and 74°F (18.3C and 23.3C).

Optional Acoustic Packages

For sound-critical applications, optional acoustical blankets can be factory-installed on each compressor. They are also available for retrofit field installation.

32 Catalog ACZ-AGZB1-1

Electrical Data

Field Wiring

Wiring must comply with all applicable codes and ordinances. Warranty is void if wiring is not in accordance with specifications. Copper wire is required for all power lead terminations at the unit.

ACZ-B and AGZ-B units have single-point power connection. A single field supplied fused disconnect is required or it can be supplied as a factory-mounted option. The control transformer is factory mounted.

ACZ/AGZ-B units are rated to 115F (46C) maximum operating ambient air temperature as standard. There is no high ambient option of vents or fans.

Electrical Data, R-22

Table 25, AGZ/ACZ-B, Electrical Data, Single Point, R-22

AGZ Unit Size

-- 010B

010B 013B

013B 016B

017B 020B

020B 025B

025B 028B

029B 033B

034B 039B

NOTE: See page 39 for all Electrical Data notes.

ACZ Unit Size

Minimum

Volts

Circuit

Ampacity

(MCA)

208 45 3 8 AWG 1 1.00 (25) 50 50 230 45 3 8 AWG 1 1.00 (25) 50 50 460 22 3 10 AWG 1 1.00 (25) 25 25 575 19 3 10 AWG 1 1.00 (25) 20 20

208 56 3 6 AWG 1 1.00 (25) 70 70 230 54 3 6 AWG 1 1.00 (25) 60 70 460 26 3 10 AWG 1 1.00 (25) 30 30 575 22 3 10 AWG 1 1.00 (25) 25 25

208 77 3 4 AWG 1 1.00 (25) 90 100 230 77 3 4 AWG 1 1.00 (25) 90 100 460 39 3 8 AWG 1 1.00 (25) 45 50 575 30 3 10 AWG 1 1.00 (25) 35 40

208 82 3 4 AWG 1 1.00 (25) 110 110 230 80 3 4 AWG 1 1.00 (25) 90 100 460 41 3 8 AWG 1 1.00 (25) 50 50 575 33 3 10 AWG 1 1.00 (25) 40 40

208 113 3 2 AWG 1 1.25 (32) 125 150 230 113 3 2 AWG 1 1.25 (32) 125 150 460 50 3 8 AWG 1 1.00 (25) 60 60 575 42 3 8 AWG 1 1.00 (25) 50 50

208 126 3 1 AWG 1 1.25 (32) 150 150 230 126 3 1 AWG 1 1.25 (32) 150 150 460 58 3 6 AWG 1 1.00 (25) 70 70 575 50 3 8 AWG 1 1.00 (25) 60 60

208 138 3 1/0 AWG 1 1.50 (38) 175 175 230 138 3 1/0 AWG 1 1.50 (38) 175 175 460 69 3 4 AWG 1 1.00 (25) 80 90 575 57 3 6 AWG 1 1.00 (25) 70 70

208 182 3 3/0 AWG 1 2.00 (51) 250 250 230 182 3 3/0 AWG 1 2.00 (51) 250 250 460 78 3 4 AWG 1 1.00 (25) 90 100 575 63 3 6 AWG 1 1.00 (25) 70 80

Quantity

Field Wire

Wire

Gauge

75C

Power Supply

Hub (Conduit

Connection)

Quantity

Nominal

Size

In. (mm)

Recommended Maximum

Field Fuse

or Breaker Size

Catalog ACZ-AGZB1-1

Table 26, AGZ/ACZ-B, Compressor & Condenser Fan Motor Amp Draw, R-22

Rated Load Amps Locked Rotor Amps

AGZ

ACZ

Unit

Size

-- 010B

010B 013B

013B 016B

017B 020B

020B 025B

025B 028B

029B 033B

034B 039B

NOTE: See page 39 for all Electrical Data notes.

Volts

208 14.8 14.8 5.8 2 21.4 91 91 230 14.8 14.8 5.8 2 23.7 91 91 460 7.1 7.1 2.8 2 10.7 50 50 575 5.8 5.8 2.5 2 11.0 37 37 208 19.4 19.4 5.8 2 21.4 156 156 230 18.6 18.6 5.8 2 23.7 156 156 460 9.0 9.0 2.8 2 10.7 75 75 575 7.4 7.4 2.5 2 11.0 54 54 208 28.8 28.8 5.8 2 21.4 195 195 230 28.8 28.8 5.8 2 23.7 195 195 460 14.7 14.7 2.8 2 10.7 95 95 575 10.8 10.8 2.5 2 11.0 80 80 208 31.2 31.2 5.8 2 21.4 225 225 230 30.1 30.1 5.8 2 23.7 225 225 460 15.5 15.5 2.8 2 10.7 114 114 575 12.1 12.1 2.5 2 11.0 80 80 208 42.3 42.3 5.8 3 21.4 245 245 230 42.3 42.3 5.8 3 23.7 245 245 460 18.2 18.2 2.8 3 10.7 125 125 575 14.9 14.9 2.5 3 11.0 100 100 208 48.1 48.1 5.8 3 21.4 300 300 230 48.1 48.1 5.8 3 23.7 300 300 460 21.8 21.8 2.8 3 10.7 150 150 575 18.6 18.6 2.5 3 11.0 109 109 208 53.2 53.2 5.8 3 21.4 340 340 230 53.2 53.2 5.8 3 23.7 340 340 460 26.5 26.5 2.8 3 10.7 173 173 575 21.7 21.7 2.5 3 11.0 132 132 208 73.1 73.1 5.8 3 21.4 505 505 230 73.1 73.1 5.8 3 23.7 505 505 460 30.5 30.5 2.8 3 10.7 225 225 575 24.4 24.4 2.5 3 11.0 180 180

Compressors Fan Motor Compressors

No. 1 No. 2

Fan

Motor

(Each)

Qty

Amps (Each)

Across-The-Line

No. 1 No. 2

34 Catalog ACZ-AGZB1-1

Table 27, AGZ/ACZ-B, Field Wiring Data, R-22

AGZ Unit Size

-- 010B

010B 013B

013B 016B

017B 020B

020B 025B

025B 028B

029B 033B

034B 039B

NOTES:

1. High Interruptor or HSCCR Circuit Breakers are not available in these sizes

2. "Size" is the maximum amperage rating for the terminals or the main electrical device.

3. "Size" is the disconnect part number and not the amperage rating for the terminals or the main electrical device.

4. "Connection" is the range of wire sizes that the terminals on the electrical device will accept.

5. See page

ACZ

Unit

Size

Volts

39 for all electrical notes

Standard Power Block Terminal

Maximum

Terminal

Amps

208 175 14 AWG – 2/0 60 14 AWG – 1 AWG 230 175 460 175 575 175

208 175 230 175 460 175 575 175

208 335 6 AWG – 400 kcmil 225 2 AWG - 4/0 230 335 6 AWG – 400 kcmil 225 2 AWG - 4/0 460 175 14 AWG – 2/0 100 8 AWG - 1/0 575 175 14 AWG – 2/0 100 8 AWG - 1/0

Wiring to

Connector Wire

(Copper Wire Only)

14 AWG – 2/0 60 14 AWG – 1 AWG 70 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 35 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 30 10 AWG - 1/0

14 AWG – 2/0 14 AWG – 2/0 60 14 AWG – 1 AWG 80 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 40 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 35 10 AWG - 1/0

14 AWG – 2/0 14 AWG – 2/0 14 AWG – 2/0 60 14 AWG – 1 AWG 60 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 50 10 AWG - 1/0

14 AWG – 2/0 14 AWG – 2/0 14 AWG – 2/0 60 14 AWG – 1 AWG 70 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 50 10 AWG - 1/0

14 AWG – 2/0 14 AWG – 2/0 14 AWG – 2/0 60 14 AWG – 1 AWG 80 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 70 10 AWG - 1/0

14 AWG – 2/0 14 AWG – 2/0 14 AWG – 2/0 14 AWG – 2/0

Range

Optional Disconnect Switch

Disc.

Size

100 8 AWG - 1/0 100 8 AWG - 1/0

125 3 AWG – 3/0 125 3 AWG - 3/0

225 2 AWG - 4/0 225 2 AWG - 4/0 100 8 AWG - 1/0

225 2 AWG - 4/0 225 2 AWG - 4/0 100 8 AWG - 1/0 100 8 AWG - 1/0

Wiring to

Connector Wire

Range

(Copper Wire Only)

60 14 AWG – 1 AWG

Wiring to High Interrupt

or HSCCR Circuit Breaker

Max.

Amps

125 3 AWG - 3/0 125 3 AWG - 3/0

175 6 AWG - 350 kcmil 175 6 AWG - 350 kcmil

200 6 AWG - 350 kcmil 200 6 AWG - 350 kcmil 100 10 AWG - 1/0

225 6 AWG - 350 kcmil 225 6 AWG - 350 kcmil 125 3 AWG - 3/0

N/A Note 1 N/A Note 1 150 6 AWG - 350 kcmil 125 3 AWG - 3/0

Connector Wire

Range

(Copper Wire Only)

70 10 AWG - 1/0

90 10 AWG - 1/0

80 10 AWG - 1/0

90 10 AWG - 1/0

Catalog ACZ-AGZB1-1

Electrical Data, R-407C

Table 28, AGZ/ACZ-B, Electrical Data, R-407C

Power Supply

Wire

Gauge

75C

1 1.00 (25)

AGZ

Unit Size

-- 010B

010B 013B

013B

017B 020B

020B 025B

025B 028B

029B 033B

034B 039B

NOTE: See page 39for all Electrical Data notes.

ACZ Unit Size

016B

Volts

208 230 460 575

Minimum

Circuit

Ampacity

(MCA)

45 45 22 19

58 54 27 22

77 77 39 30

82 80 41 33

113 113

51 41

129 129

61 51

148 139

72 58

187 182

85 73

Quantity

Field Wire

3 8 AWG 1 1.00 (25) 3 8 AWG 1 1.00 (25) 3 10 AWG 1 1.00 (25) 3 10 AWG 1 1.00 (25)

3 6 AWG 1 1.00 (25) 3 6 AWG 1 1.00 (25) 3 10 AWG 1 1.00 (25) 3 10 AWG 1 1.00 (25)

3 4 AWG 1 1.00 (25) 3 4 AWG 1 1.00 (25) 3 8 AWG 1 1.00 (25) 3 10 AWG 1 1.00 (25)

3 2 AWG 1 1.25 (32) 3 2 AWG 1 1.25 (32) 3 6 AWG 1 1.00 (25) 3 8 AWG 1 1.00 (25)

3 1 AWG 1 1.25 (32) 3 1 AWG 1 1.25 (32) 3 6 AWG 1 1.00 (25) 3 6 AWG

3 1/0 AWG 1 1.50 (38) 3 1/0 AWG 1 1.50 (38) 3 4 AWG 1 1.00 (25) 3 6 AWG 1 1.00 (25)

3 3/0 AWG 1 2.00 (51) 3 3/0 AWG 1 2.00 (51) 3 4 AWG 1 1.00 (25) 3 4 AWG

Hub (Conduit

Connection)

Quantity

Nominal

Size

In. (mm)

Field Fuse

or Breaker Size

Recommended Maximum

50 50 50 50 25 25 20 20

70 70 60 70 30 35 25 25

90 100 90 100 45 50 35 40

110 110

90 100 50 50 40 40

125 150 125 150

60 60 50 50

150 175 150 175

70 80 60 60

175 200 175 175

80 100 80 80

250 250 250 250 100 110 100 100

36 Catalog ACZ-AGZB1-1

Table 29, AGZ/ACZ-B, Compressor & Condenser Fan Motor Amp Draw, R-407C

Rated Load Amps Locked Rotor Amps

AGZ

ACZ Unit Size

010B 013B

013B 016B

017B 020B

020B 025B

025B 028B

029B 033B

034B 039B

NOTE: See page 39 for all Electrical Data notes.

Unit

Size

-- 010B

Volts

208 230 460 575 208 230 460 575 208 230 460 575 208 230 460 575 208 230 460 575 208 230 460 575 208 230 460 575 208 230 460 575

Compressors Compressors

No. 1 No. 2

14.8 14.8

7.1 7.1

5.8 5.8

20.3 20.3

18.6 18.6

9.2 9.2

7.4 7.4

28.8 28.8

14.7 14.7

10.8 10.8

31.2 31.2

30.1 30.1

15.5 15.5

12.1 12.1

42.3 42.3

18.6 18.6

14.6 14.6

49.4 49.4

23.1 23.1

19.2 19.2

57.9 57.9

53.8 53.8

28.2 28.2

22.4 22.4

75.0 75.0

73.1 73.1

34.0 34.0

28.8 28.8

F.L. Amps

Fan

Motor

(Each)

5.8 2 21.4 91 91

5.8 2 23.7 91 91

2.8 2 10.7 50 50

2.5 2 11.0 37 37

5.8 2 21.4 156 156

5.8 2 23.7 156 156

2.8 2 10.7 75 75

2.5 2 11.0 54 54

5.8 2 21.4 195 195

5.8 2 23.7 195 195

2.8 2 10.7 95 95

2.5 2 11.0 80 80

5.8 2 21.4 225 225

5.8 2 23.7 225 225

2.8 2 10.7 114 114

2.5 2 11.0 80 80

5.8 3 21.4 245 245

5.8 3 23.7 245 245

2.8 3 10.7 125 125

2.5 3 11.0 100 100

5.8 3 21.4 300 300

5.8 3 23.7 300 300

2.8 3 10.7 150 150

2.5 3 11.0 109 109

5.8 3 21.4 340 340

5.8 3 23.7 340 340

2.8 3 10.7 173 173

2.5 3 11.0 132 132

5.8 3 21.4 505 505

5.8 3 23.7 505 505

2.8 3 10.7 225 225

2.5 3 11.0 180 180

No. of

Fan

Mtrs

L.R.Amps

Fan Motor (Each) No. 1 No. 2

Across-The-Line

Catalog ACZ-AGZB1-1

Table 30, AGZ/ACZ-B, Field Wiring Data, R-407C

ACZ

AGZ

Unit

Unit Size

-- 010B

010B 013B

013B 016B

017B 020B

020B 025B

025B 028B

029B 033B

034B 039B

NOTES:

1. High Interruptor or HSCCR Circuit Breakers are not available in these sizes.

2. See page

Volts

Size

208 175 14 AWG – 2/0 230 175 460 175 575 175

208 175 230 175 460 175 575 175

208 335 6 AWG – 400 kcmil 230 335 6 AWG – 400 kcmil 460 175 14 AWG – 2/0 575 175 14 AWG – 2/0

39 for all Electrical Data notes.

Standard Power Block Terminal

Maximum

Terminal Amps

Wiring to

Connector Wire

Range

(Copper Wire Only)

14 AWG – 2/0 60 14 AWG – 1 AWG 70 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 35 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 30 10 AWG - 1/0

14 AWG – 2/0 60 14 AWG – 2/0 60 14 AWG – 1 AWG 80 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 40 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 35 10 AWG - 1/0

14 AWG – 2/0 100 14 AWG – 2/0 100 14 AWG – 2/0 60 14 AWG – 1 AWG 60 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 50 10 AWG - 1/0

14 AWG – 2/0 100 14 AWG – 2/0 100 14 AWG – 2/0 60 14 AWG – 1 AWG 70 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 50 10 AWG - 1/0

14 AWG – 2/0 125 14 AWG – 2/0 125 14 AWG – 2/0 60 14 AWG – 1 AWG 80 10 AWG - 1/0 14 AWG – 2/0 60 14 AWG – 1 AWG 70 10 AWG - 1/0

14 AWG – 2/0 225 14 AWG – 2/0 225 14 AWG – 2/0 100 14 AWG – 2/0 60

14 AWG – 2/0 225 14 AWG – 2/0 225 14 AWG – 2/0 100 14 AWG – 2/0 100

Disconnect

Wiring to

Connector Wire

Range

(Copper Wire Only)

14 AWG – 1 AWG

8 AWG - 1/0 8 AWG - 1/0

3 AWG – 3/0

3 AWG - 3/0

2 AWG - 4/0 2 AWG - 4/0 8 AWG - 1/0

14 AWG – 1 AWG

2 AWG - 4/0 2 AWG - 4/0 8 AWG - 1/0 8 AWG - 1/0

Optional Disconnect Switch

Size

225 225 100 100

Wiring to High Interrupt

or HSCCR Circuit Breaker

Max.

Amps

125 3 AWG - 3/0 125 3 AWG - 3/0

175 6 AWG - 350 kcmil 175 6 AWG - 350 kcmil

200 6 AWG - 350 kcmil 200 6 AWG - 350 kcmil 100 10 AWG - 1/0

225 6 AWG - 350 kcmil 225 6 AWG - 350 kcmil 125 3 AWG - 3/0

N/A Note 1 N/A Note 1 150 6 AWG - 350 kcmil 125 3 AWG - 3/0

Connector Wire

Range

(Copper Wire Only)

70 10 AWG - 1/0

90 10 AWG - 1/0

80 10 AWG - 1/0

90 10 AWG - 1/0

38 Catalog ACZ-AGZB1-1

Notes for Electrical Data:

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

RLA of all other loads in the circuit.

2. The control transformer is furnished and no separate 115V power supply is required.

3. For a separate 115V control circuit power supply, use 10 amps for all unit sizes.

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

ampacity in accordance with NEC. Voltage drop has not been included. Therefore, it is recommended that power leads be kept short. All terminal block connections must be made with copper wire.

5. “Recommended Fuse Sizes” are selected at approximately 175% of the largest compressor RLA, plus

100% of the RLA of all other loads in the circuit.

6. “Maximum Fuse or breaker size” is selected at approximately 225% of the largest compressor RLA, plus

100% of all other loads in the circuit.

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

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

8. The unit must be electrically grounded according to national and local electrical codes.

Voltage Limitations:

Within  10 percent of nameplate rating Important: 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. This is an important restriction that must be adhered to.

Notes for “Compressor and Condenser Fan Amp Draw”:

1. Compressor RLA values are for wiring sizing purposes only but may not reflect normal operating current

draw at rated capacity.

2. Fan motor FLA values are approximate fan motor amp values at rated voltage.

Notes for “Field Wiring Data”

1. Requires a single disconnect to supply electrical power to the unit. This power supply must either be

fused or use a circuit breaker.

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

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

Catalog ACZ-AGZB1-1

Figure 10, Typical ACZ Single-Point Connection Field Wiring

UNIT MAIN TERMINAL

BLOCK

GND LUG

3 PHASE

POWER

SUPPLY

DISCONNECT (BY OTHERS)

TO COMPRESSOR(S)

AND FAN MOTORS

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

120VAC

CONTROL POWER

FACTORY SUPPLIED ALARM

ALARM BELL

OPTION

FUSED CONTROL

CIRCUIT

TRANSFORMER

DISCONNECT

(BY OTHERS)

10A

FUSE

(BY OTHERS)

LIQUID LINE SOLENOID

120 VAC 1.0 AMP MAX

SV1

SV5

HOT GAS BYPASS SOLENOID

120 VAC 1.0 AMP MAX

DX EVAP. FAN PUMP RELAY

(BY OTHERS)

120 VAC 1.0 AMP MAX

FIELD WIRED

LARM BELL RELAY

120

VAC

TB1

TB1-20

CONTROL

CIRCUIT

FUSE

120 VAC

GND

TIME

EMOTE STOP

SWITCH

(BY OTHERS)

CLOCK

EVAP. FLOW SWITCH

---MANDATORY–(BY OTHERS)

STAGE 1 NOR. OPEN CONTACTORS

STAGE 2 NOR. OPEN CONTACTORS

OFF

UTO

MANUAL

NOR. OPEN PUMP AUX. CONTACTS (OPTIONAL)

TB2

J5-ID7

J5-ID8

IF REMOTE STOP CONTROL IS USED, REMOVE LEAD 843

843

FROM TERM. 25 TO 35.

DWG. 330539401 REV.0B

LARM BELL

RELAY

COM NO

BELL

LARM BELL OPTION

40 Catalog ACZ-AGZB1-1

Figure 11, AGZ 010B through AGZ 034B, Typical Field Wiring Diagram

UNIT MAIN TERMINAL

BLOCK

GND LUG

TO COMPRESSOR(S)

AND FAN MOTORS

3 PHASE

POWER SUPPLY

DISCONNECT

(BY OTHERS)

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

120VAC

CONTROL POWER

SEPARATE EVAP.

HEATER POWER

FIELD WIRED

FACTORY SUPPLIED ALARM

ALARM

BELL

OPTION

REMOTE STOP

SWITCH

(BY OTHERS)

ICE MODE

SWITCH

(BY OTHERS)

FIELD WIRED

ALARM BELL RELAY

CHW FLOW SWITCH

120VAC

(BY OTHERS)

HOT GAS BYPASS SOLENOID

TIME

CLOCK

---MANDATORY–(BY OTHERS)

4-20MA FOR CHW RESET

(BY OTHERS)

FUSED CONTROL

TRANSFORMER

DISCONNECT (BY OTHERS)

(BY OTHERS)

DISCONNECT (BY OTHERS)

LIQUID LINE SOLENOID

120 VAC 1.0 AMP MAX

SV1

SV5

120 VAC 1.0 AMP MAX

CHW PUMP RELAY

(BY OTHERS)

120 VAC 1.0 AMP MAX

AUTO

MANUAL

NOR. OPEN PUMP AUX. CONTACTS (OPTIONAL)

AUTO

MANUAL

CIRCUIT

10A

FUSE

(BY OTHERS)

OFF

10A

FUSE

24VAC

120

VAC

TB1

TB2

GZ REMOTE EVAP ONLY

843

TB1-20

CONTROL

CIRCUIT

FUSE

GND

IF REMOTE STOP CONTROL IS USED, REMOVE LEAD 843 FROM TERM. 25 TO 35.

GND

IF SEPARATE EVAPORATOR

HEATER POWER OPTION

IS USED - REMOVE

MECHANICAL JUMPER

BETWEEN TB1-5 AND TB1-6

& TB1-15 AND TB1-16.

120 VAC

BELL

ALARM BELL OPTION

ALARM BELL

RELAY

COM NO

FIELD WIRIN

FACTORY WIRIN

LABEL DWG. 330538401 REV.0

Note: See control and power wiring diagrams on unit control panel for specific unit information.

Catalog ACZ-AGZB1-1

Physical Data

AGZ-BS, R-22/R-407C

Table 31, Physical Data, AGZ 010BS through 017BS, Packaged, R-22/R-407C

PHYSICAL DATA

BASIC DATA

Unit Capacity @ ARI Conditions (1), Tons (kW) 10.0 (36.2) 13.7 (48.2) 15.8 (55.6) Number Of Refrigerant Circuits 1 1 1 Unit Operating Charge, R-22 and [R-407C], Lb. (kg) 22.0 (10.0) 24.0 (10.9) 31.0 (14.1) Cabinet Dimensions, LxWxH, In. 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8 Cabinet Dimensions, LxWxH, (mm) (1869) x (1176) x (1289) (1869) x (1176) x (1289) (1869) x (1176) x (1289) Unit Operating Weight, Lb. (kg) 1095 (498) 1190 (541) 1300 (591) Unit Shipping Weight, Lb. (kg) 1085 (493) 1170 (532) 1280 (582)

Add'l Weight If Copper Finned Coils, Lb. (kg) R-22 and [R-407C]

COMPRESSORS Type Scroll Scroll Scroll Nominal Horsepower 6.0 / 6.0 7.5 / 7.5 9.0 / 9.0 Oil Charge Per Compressor of a Tandem Set, oz. (g) 60 (1701) 85 (2410) 110 (3119)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DSPLACEMENT

Standard Staging 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area, One of Two Sides, Sq. Ft. (M2) 30.3 (2.8) 30.3 (2.8) 30.3 (2.8) Finned Height x Finned Length, In. 84 x 52 84 x 52 84 x 52 Finned Height x Finned Length, (mm) (2134) x (1321) (2134) x (1321) (2134) x (1321) Fins Per Inch x Rows Deep: R-22 and [R-407C] 16 x 2 [16 x 2] 16 x 2 [16 x 2] 16 x 3 [16 x 3] Pumpdown Capacity Lb. (kg) 35.3 (16.0) 35.3 (16.0) 52.9 (24.0)

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

Number Of Fans - Fan Diameter, In. (mm) 2 – 26 (660) 2 – 26 (660) 2 – 26 (660) Number Of Motors - HP (kW) 2 – 1.0 (0.75) 2 – 1.0 (0.75) 2 – 1.0 (0.75) Fan And Motor RPM, 60 Hz 1140 1140 1140 60 Hz Total Unit Airflow, CFM (l/s) 13950 (6584) 13950 (6584) 12000 (5664)

DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE

Connection Size Victaulic, In. (mm) 2 (51) 2 (51) 2 (51) Water Volume, Gallons (L) 0.9 (3.6) 1.7 (6.3) 2.0 (7.6) Maximum Refrigerant Working Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103) Maximum Water Pressure, psig (kPa) 350 (2413) 350 (2413) 350 (2413)

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

010B 013B 017B

176 (80.0)

[176 (80.0)]

AGZ MODEL NUMBER

176 (80.0)

[176 (80.0)]

264 (120.0)

[264 (120.0)]

42 Catalog ACZ-AGZB1-1

Table 32, Physical Data, AGZ 020BS through 034BS, Packaged, R-22/R-407c

PHYSICAL DATA

BASIC DATA

Unit Capacity @ ARI Conditions (1), Tons (kW) 20.6 (72.4) 22.7 (79.8) 27.7 (97.5) 34.0 (119.5) Number Of Refrigerant Circuits 1 1 1 1

Unit Operating Charge, R-22 and [R-407C], Lb. (kg)

Cabinet Dimensions, LxWxH, In. 106.2x 46.3 x 50.8 106.2x 46.3 x 50.8 106.2x 46.3 x 58.8 106.2x 46.3 x 58.8 Cabinet Dimensions, LxWxH, (mm) Unit Operating Weight, Lbs. (kg) 1590 (723) 1635 (743) 1830 (832) 2315 (1052)

Unit Shipping Weight, Lbs. (kg) 1570 (714) 1610 (732) 1800 (818) 2270 (1032) Add'l Weight If Copper Finned Coils, Lb. (kg)

R-22 and [R-407C]

COMPRESSORS

Type Scroll Scroll Scroll Scroll Nominal Horsepower 12.0 / 12.0 13.0 / 13.0 15.0 / 15.0 20.0 / 20.0

Oil Charge Per Compressor of a Tandem Set, oz. (g)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Standard Staging 0 –50 - 100 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area, One of Two Sides, Sq. Ft. (M2) 49.0 (4.6) 49.0 (4.6) 58.3 (5.4) 58.3 (5.4) Finned Height x Finned Length, In. 84 x 84 84 x 84 100 x 84 100 x 84 Finned Height x Finned Length, (mm) (2134) x (2134) (2134) x (2134) (2545 ) x (2134) (2545 ) x (2134) Fins Per Inch x Rows Deep: R22 and [R407C]

Pumpdown Capacity, R-22 and [R-407C] Lb. (kg)

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

Number Of Fans - Fan Diameter, In. (mm) 3 – 26 (660) 3 – 26 (660) 3 – 26 (660) 3 – 26 (660) Number Of Motors - HP (kW) 3 – 1.0 (0.75) 3 – 1.0 (0.75) 3 – 1.0 (0.75) 3 – 1.0 (0.75) Fan And Motor RPM, 60 Hz 1140 1140 1140 1140 60 Hz Total Unit Airflow, CFM (l/s) 20925 (9877) 20925 (9877) 19800 (9346) 19800 (9346)

DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE

Connection Size Victaulic, In. (mm) 2 (51) 2 (51) 2 (51) 2 (51) Water Volume, Gallons (L) 2.2 (8.2) 3.0 (11.5) 4.0 (15.1) 5.6 (21.0) Max. Refrigerant Working Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) Maximum Water Pressure, psig (kPa) 350 (2413) 350 (2413) 350 (2413) 350 (2413)

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

020B 025B 029B 034B

34.0 (15.4)

[38.0 (17.3)]

(2697) x (1176) x

(1289)

284 (129)

[426 (194)]

110 (3119) 110 (3119) 110 (3119) 158 (4479)

16 x 2 [16 x 3] 16 x 3 [16 x 3] 16 x 3 [16 x 3] 16 x 3 [16 x 3]

56.9 (25.9)

[85.4 (38.8)]

AGZ MODEL NUMBER

42.0 (19.1) 47.0 (21.3) 50.0 (22.7)

(2697) x (1176) x

(1289)

426 (194)

[426 (194)]

85.4 (38.8) 101.6 (46.2) 101.6 (46.2)

(2697) x (1176) x

(1493)

508 (231)

[508 (231)]

(2697) x (1176) x

(1493)

508 (231)

[508 (231)]

Catalog ACZ-AGZB1-1

ACZ-BS, R-22/R-407C

Table 33, Physical Data, ACZ 010BS through 020BS, R-22/R-407C

PHYSICAL DATA

BASIC DATA

Number Of Refrigerant Circuits 1 1 1 1 Operating Charge, R-22/R-407C, Lb. (kg), Note 22.0 (10.0) 22.0 (10.0) 24.0 (10.9) 31.0 (14.1) Cabinet Dimensions, LxWxH, In. 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8

Cabinet Dimensions, LxWxH, (mm) Unit Operating Weight, Lbs. (kg) 1015 (461) 1015 (461) 1090 (495) 1190 (541)

Unit Shipping Weight, Lbs. (kg) 1000 (454) 1000 (454) 1065 (484) 1150 (523) Add'l Weight If Copper Finned Coils, Lb. (kg)

R-22 and [R-407C]

COMPRESSORS

Type Scroll Scroll Scroll Scroll Nominal Horsepower 4.0 / 4.0 6.0 / 6.0 7.5 / 7.5 9.0 / 9.0

Oil Charge Per Compressor of a Tandem Set, oz. (g)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Standard Staging 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area,Sq. Ft. (M2) 30.3 (2.8) 30.3 (2.8) 30.3 (2.8) 30.3 (2.8) Finned Height x Finned Length, In. 84 x 52 84 x 52 84 x 52 84 x 52 Finned Height x Finned Length, (mm) (2134) x (1321) (2134) x (1321) (2134) x (1321) (2134) x (1321) Fins Per Inch x Rows Deep: R-22 and R-407C Pumpdown Capacity lb. (kg) 35.3 (16.0) 35.3 (16.0) 35.3 (16.0) 50.3 (22.8)

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

Number Of Fans - Fan Diameter, In. (mm) 2 – 26 (660) 2 – 26 (660) 2 – 26 (660) 2 – 26 (660) Number Of Motors - HP (kW) 2 – 1.0 (0.75) 2 – 1.0 (0.75) 2 – 1.0 (0.75) 2 – 1.0 (0.75) Fan And Motor RPM, 60 Hz 1140 1140 1140 1140 Total Unit Airflow, CFM (l/s), 60 Hz 13950 (6584) 13950 (6584) 13950 (6584) 12000 (5664)

Note: Operating charge is for the condensing unit only. Refrigerant lines and evaporator charge must be added.

010B 013B 016B 020B

(1869) x (1176) x

(1289)

176 (80.0)

[176 (80.0)]

57 (1616) 60 (1701) 140 (3969) 140 (3969)

16 x 2 16 x 2 16 x 2 16 x 3

ACZ MODEL NUMBER

(1869) x (1176) x

(1289)

176 (80.0)

[176 (80.0)]

(1869) x (1176) x

(1289)

176 (80.0)

[176 (80.0)]

(1869) x (1176) x

(1289)

264 (120.0)

[264 (120.0)]

44 Catalog ACZ-AGZB1-1

Table 34, Physical Data, ACZ 025BS through 039BS, R-22/R-407C

PHYSICAL DATA

BASIC DATA

Number Of Refrigerant Circuits 1 1 1 1 Operating Charge, R-22/R-407C, Lb. (kg), Note 34.0 (15.4) 36.0 (16.3) 47.0 (21.3) 50.0 (22.7) Cabinet Dimensions, LxWxH, In. 106.2x 46.3 x 50.8 106.2x 46.3 x 50.8 106.2x 46.3 x 58.8 106.2x 46.3 x 58.8

Cabinet Dimensions, LxWxH, (mm) Unit Operating Weight, Lbs. (kg) 1470 (667) 1490 (676) 1760 (799) 1960 (890)

Unit Shipping Weight, Lbs. (kg) 1580 (717) 1600 (726) 1890 (858) 2090 (949) Add'l Weight If Copper Finned Coils, Lb. (kg)

COMPRESSORS

Type Scroll Scroll Scroll Scroll Nominal Horsepower 12.0 / 12.0 13.0 / 13.0 15.0 / 15.0 20.0 / 20.0

Oil Charge Per Compressor of a Tandem Set, oz. (g)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Standard Staging 0 – 50 - 100 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Coil Face Area,Sq. Ft. (M2) 49.0 (4.6) 49.0 (4.6) 58.3 (5.4) 58.3 (5.4) Finned Height x Finned Length, In. 84 x 84 84 x 84 100 x 84 100 x 84 Finned Height x Finned Length, (mm) (2134) x (2134) (2134) x (2134) (2545 ) x (2134) (2545 ) x (2134) Fins Per Inch x Rows Deep: R-22 and R-407C 16 x 2 16 x 2 16 x 3 16 x 3 Pumpdown Capacity lb. (kg) 53.1 (24.0) 53.1 (24.0) 90.7 (41.1) 92.8 (42.0)

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

Number Of Fans - Fan Diameter, In. (mm) 3 – 26 (660) 3 – 26 (660) 3 – 26 (660) 3 – 26 (660) Number Of Motors - HP (kW) 3 – 1.0 (0.75) 3 – 1.0 (0.75) 3 – 1.0 (0.75) 3 – 1.0 (0.75) Fan And Motor RPM, 60 Hz 1140 1140 1140 1140 Total Unit Airflow, CFM (l/s), 60 Hz 20925 (9877) 20925 (9877) 19800 (9346) 19800 (9346)

Note: Operating charge is for the condensing unit only. Refrigerant lines and evaporator charge must be added.

025B 028B 033B 039B

(2697) x (1176) x

(1289)

350 (159)

[426 (194)]

110 (3119) 110 (3119) 110 (3119) 158 (4479)

ACZ MODEL NUMBER

(2697) x (1176) x

(1289)

426 (194)

[426 (194)]

(2697) x (1176) x

(1493)

435 (197)

[435 (197)]

(2697) x (1176) x

(1493)

435 (197)

[435 (197)]

Catalog ACZ-AGZB1-1

AGZ-BM, R-22/R-407C

Table 35, Physical Data, AGZ 010BM through 017BM, Remote Evaporator, R-22/R-407C

PHYSICAL DATA

BASIC DATA

Unit Capacity @ ARI Conditions (1), Tons (kW) 10.0 (36.2) 13.7 (48.2) 15.8 (55.6) Number Of Refrigerant Circuits 1 1 1 Unit Operating Charge, R-22 and [R-407C], Lb. (kg) 13 (5.9) 14 (5.3) 17 (7.7) Cabinet Dimensions, LxWxH, In. 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8 Cabinet Dimensions, LxWxH, (mm) (1869) x (1176) x (1289) (1869) x (1176) x (1289) (1869) x (1176) x (1289) Unit Operating Weight, Lb. (kg) 950 (431) 1276 (579) 1278 (580) Unit Shipping Weight, Lb. (kg) 1025 (465) 1350 (613) 1363 (619)

Add'l Weight If Copper Finned Coils, Lb. (kg) R-22 and [R-407C]

COMPRESSORS Type Scroll Scroll Scroll Nominal Horsepower 6.0 / 6.0 7.5 / 7.5 9.0 / 9.0 Oil Charge Per Compressor of a Tandem Set, oz. (g) 60 (1701) 85 (2410) 110 (3119)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DSPLACEMENT

Standard Staging 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

REMOTE DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE

Water Connection Size Victaulic, In. (mm) 2 (51) 2 (51) 2 (51) Water Volume, Gallons (L) 0.9 (3.6) 1.7 (6.3) 2.0 (7.6) Liquid Line Conn. Braze, inches 1.125 1.125 1.125 Suction Line Conn. Braze, Inches 2.125 2.125 2.125 Temperature Sensor Conn. NPT, Inches 0.75 0.75 0.75 Dry Weight, lbs (kg) 50 (22) 75 (34) 87 (39) Operating Weight, lbs (kg) 58 (26) 88 (40) 109 (49) Maximum Refrigerant Working Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103) Maximum Water Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103) Vent and Drain Conn. Field Field Field

NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range and does not take field-installed lines into account.

010B 013B 017B

176 (80.0)

[176 (80.0)]

AGZ MODEL NUMBER

176 (80.0)

[176 (80.0)]

264 (120.0)

[264 (120.0)]

46 Catalog ACZ-AGZB1-1

Table 36, Physical Data, AGZ 020BM through 034BM, Remote Evaporator, R-22/R-407C

PHYSICAL DATA

BASIC DATA

Unit Capacity @ ARI Conditions (1), Tons (kW) 20.6 (72.4) 22.7 (79.8) 27.7 (97.5) 34.0 (119.5) Number Of Refrigerant Circuits 1 1 1 1

Unit Operating Charge, R-22 and [R-407C], Lb. (kg)

Cabinet Dimensions, LxWxH, In. 106.2x 46.3 x 50.8 106.2x 46.3 x 50.8 106.2x 46.3 x 58.8 106.2x 46.3 x 58.8 Cabinet Dimensions, LxWxH, (mm) Unit Operating Weight, Lbs. (kg) 1459 (662) 1478 (671) 1622 (737) 1817 (825)

Unit Shipping Weight, Lbs. (kg) 1558 (707) 1576 (716) 1719 (780) 1914 (869) Add'l Weight If Copper Finned Coils, Lb. (kg)

R-22 and [R-407C]

COMPRESSORS

Type Scroll Scroll Scroll Scroll Nominal Horsepower 12.0 / 12.0 13.0 / 13.0 15.0 / 15.0 20.0 / 20.0

Oil Charge Per Compressor of a Tandem Set, oz. (g)

CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Standard Staging 0 –50 - 100 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING

Pumpdown Capacity, R-22 and [R-407C] Lb. (kg)

CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE

REMOTE DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE

Connection Size Victaulic, In. (mm) 2 (51) 2 (51) 2 (51) 2 (51) Water Volume, Gallons (L) 2.2 (8.2) 3.0 (11.5) 4. 0 (15.1) 5.6 (21.0) Liquid Line Conn. Braze, inches 1.125 1.125 1.375 1.375 Suction Line Conn. Braze, Inches 2.125 2.125 2.125 2.125 Temperature Sensor Conn. NPT, Inches 0.75 0.75 0.75 0.75 Dry Weight, lbs (kg) 92 (42) 124 (56) 156 (71) 211 (96) Operating Weight, lbs (kg) 110 (50) 148 (67) 188 (85) 255 (116) Max. Refrigerant Working Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) Maximum Water Pressure, psig (kPa) 350 (2413) 350 (2413) 350 (2413) 350 (2413) Drain and Vent Connections Field Field Field Field

NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range and does not take field-installed lines into account.

020B 025B 029B 034B

34.0 (15.4)

[38.0 (17.3)]

(2697) x (1176) x

(1289)

284 (129)

[426 (194)]

110 (3119) 110 (3119) 110 (3119) 158 (4479)

16 x 2 [16 x 3] 16 x 3 [16 x 3] 16 x 3 [16 x 3] 16 x 3 [16 x 3]

56.9 (25.9)

[85.4 (38.8)]

AGZ MODEL NUMBER

42.0 (19.1) 47.0 (21.3) 50.0 (22.7)

(2697) x (1176) x

(1289)

426 (194)

[426 (194)]

85.4 (38.8) 101.6 (46.2) 101.6 (46.2)

(2697) x (1176) x

(1493)

508 (231)

[508 (231)]

(2697) x (1176) x

(1493)

508 (231)

[508 (231)]

Catalog ACZ-AGZB1-1

CZ039

Dimensions & Weights

ACZ-BS Dimensions

Figure 12, ACZ 010BS - 020BS (See page 52 for additional dimensions and weights)

L2L4

ACCESS

PANEL

NOTE:

ISOLATOR MOUNTING HOLE LOCATIONS ARE ON BOTTOM SURFACE OF BASE R

FORKLIFT SLOTS (FOR LIFTING) ARE LOC IN THE BASE RAILS WHICH RUN THE LENGTH OF THE UNIT.

Figure 13, ACZ025BS - 039BS (See page

73.80

46.18

49.06

ILS.

TED

5.17

9.19

L1, L2L3, L4

21.18 X

4.56

5.06

8.86

.875

POWER ENTRY

KNOCKOUT

(OTHER SIDE)

HOT GAS BYPASS

SUCTION

18.84

LIQUID

ELECTRICAL

24.57

20.79

4.00 MOUNTING HOLES DIA. 1.00 INCH QTY. 4

CONTROL

KNOCKOUT

CONTROL BOX

ACCESS DOORS

.875

ACCESS

DOOR

MOUNTING

31.15

HOLES

46.42

ALL DIMENSIONS ARE IN DECIMAL INCHES

R3319872 00

7.64

2-FAN ACZ-B

REV.DRAWING NUMBER

POWER ENTRY

NONE

51.00

SCALE

52 for additional dimensions and weights)

ACCESS

PANEL

NOTE:

ISOLATOR MOUNTING HOLE LOCATIONS ARE ON BOTTOM SURFACE OF BASE RAILS.

FORKLIFT SLOTS (FOR LIFTING) ARE LOCATED IN THE BASE RAILS WHICH RUN THE LENGTH OF THE UNIT.

49.06 49.06

84.95

106.23

.875 POWER ENTRY KNOCKOUT (OTHER SIDE)

L1,L2L3,L4

5.17 HOT GAS BYPASS

2.67 SUCTION

9.19

LIQUID

5.06

21.18

8.86

DIM. A = ACZ025-028 = 24.6"

DIM. B = ACZ025-028 = 40.2"

DIM. C = ACZ025-033 = 18.8"

DIM. D = ACZ025-033 = 4.5"

CONTROL

ELECTRICAL

KNOCKOUT

20.79

ACZ033-039 = 33.0"

ACZ033-039 = 48.7"

ACZ039 = 12.6"

= 7.5"

.875

CONTROL PANEL

ACCESS DOORS

ACCESS

DOOR

31.10

MOUNTING

HOLES

46.38

POWER ENTRY

ACZ025-028 =51

ACZ033-039 = 5

7.64

3-FAN ACZ-B

ALL DIMENSIONS ARE IN DECIMAL INCHES

R3319873 00

REV.DRAWING NUMBER

SCALE

NONE

48 Catalog ACZ-AGZB1-1

3.00

AGZ-BS Dimensions

Figure 14, AGZ 010BS - 017BS (See page 52 for additional dimensions and weights)

NOTE:

ISOLATOR MOUNTING HOLE LOCATIONS ARE ON BOTTOM SURFACE OF BASE RAILS.

FORKLIFT SLOTS (FOR LIFTING) ARE LOCATED IN THE BASE RAILS WHICH RUN THE LENGTH OF THE UNIT.

5.17

.875

POWER ENTRY

KNOCKOUT

(OTHER SIDE)

ACCESS

PANEL

EVAP. OUTLET

CONTROL BOX

ACCESS DOORS

14.66

QTY.2

EVAP. INLET

11.27

3.00

31.70

2.61

24.57

40.18

.875

CONTROL

ELECTRICAL

KNOCKOUT

L1, L2L3, L4

46.18

49.06

21.18

4.00 MOUNTING HOLES DIA. 1.00 INCH

TY. 4

5.17

Figure 15, AGZ 020BS - 034BS, (See page

M3 M1

73.80

NOTE:

ISOLATOR MOUNTING HOLE LOCATIONS ARE ON BOTTOM SURFACE OF BASE RAILS.

FORKLIFT SLOTS (FOR LIFTING) ARE LOCATED IN THE BASE RAILS WHICH RUN THE LENGTH OF THE UNIT.

POWER ENTRY

51.00

ACCESS

DOOR

31.15

MOUNTING

HOLES

46.42

7.64

AGZ-B 2- FAN

LL DIMENSIONS ARE IN DECIMAL INCHE

R3319870 0A

SCALE

NONE

REV.DRAWING NUMBER

52 for additional dimensions and weights)

QTY.2

EVAP. INLET

31.70

11.27

POWER

ENTRY

AGZ020-025 =51 AGZ029-034 = 59

.875 POWER ENTRY KNOCKOUT (OTHER SIDE)

.875

CONTROL

ELECTRICAL

KNOCKOUT

2.67

ACCESS

PANEL

EVAP. OUTLET

CONTROL PANEL

ACCESS DOORS

14.66

ACCESS

DOOR

49.06 49.06

106.23

Catalog ACZ-AGZB1-1

84.95

L1, L2L3, L4

21.18

DIM. A = AGZ020-025 = 24.6"

AGZ029-034 = 33.0"

DIM. B = AGZ020-025 = 40.2"

AGZ029-034 = 48.7"

31.10

MOUNTING

HOLES

46.38

7.64

3-FAN AGZ-B

LL DIMENSIONS ARE IN DECIMAL INCHES

R3319871 0A

SCALE

REV.DRAWING NUMBER

NONE

AGZ-BM, Remote Evaporator Dimensions

Figure 16, AGZ 010BM - 017BM (See page 52 for additional dimensions and weights)

ACCESS

PANEL

NOTE:

ISOLATOR MOUNTING HOLE LOCATIONS ARE ON BOTTOM SURFACE OF BASE RAILS.

FORKLIFT SLOTS (FOR LIFTING) ARE LOCATED IN THE BASE RAILS WHICH RUN THE LENGTH OF THE UNIT.

.875

5.17

POWER ENTRY

KNOCKOUT

(OTHER SIDE)

HOT GAS BYPASS

SUCTION

.875

CONTROL

ELECTRICAL

KNOCKOUT

L1, L2L3, L4

73.80

21.18 X

46.18

49.06

18.84

9.19

LIQUID

4.56

5.06

8.86

4.00 MOUNTING HOLES DIA. 1.00 INCH QTY. 4

Figure 17, AGZ 020BM - 034BM (See page

20.79

24.57

CONTROL BOX

ACCESS DOORS

POWER ENTRY

51.00

ACCESS

DOOR

31.15

MOUNTING

HOLES

46.42

2-FAN AGZ-B REMOTE

ALL DIMENSIONS ARE IN DECIMAL INCHES

R3319874 00

7.64

SCALE

NONE

REV.DRAWING NUMBER

52 for additional dimensions and weights)

ACCESS

PANEL

NOTE:

ISOLATOR MOUNTING HOLE LOCATIONS ARE ON BOTTOM SURFACE OF BASE RAIL S.

FORKLIFT SLOTS (FOR LIFTING) ARE LOCATE IN THE BASE RAILS WHICH RUN THE LENGTH OF THE UNIT.

49.06 49.06

106.23

.875 POWER ENTRY KNOCKOUT (OTHER SIDE)

84.95

50 Catalog ACZ-AGZB1-1

5.17 HOT GAS BYPASS

.875

CONTROL

ELECTRICAL

KNOCKOUT

2.67 SUCTION

9.19

L1,L2L3,L4

21.18

LIQUID

5.06

8.86

DIM. A = ACZ025-028 = 24.6"

DIM. B = ACZ025-028 = 40.2"

DIM. C = ACZ025-033 = 18.8"

DIM. D = ACZ025-033 = 4.5"

20.79

ACZ033-039 = 33.0"

ACZ033-039 = 48.7"

ACZ039 = 12.6"

ACZ039 = 7.5"

CONTROL PANEL

ACCESS DOORS

ACCESS

DOOR

31.10

MOUNTING

HOLES

46.38

POWER ENTRY

ACZ025-028 =51 ACZ033-039 = 5

7.64

3-FAN AGZ-B REMOTE

LL DIMENSIONS ARE IN DECIMAL INCHES

R3319875 00

SCALE

REV.DRAWING NUMBER

NONE

Remote Evaporators

Figure 18, Remote Evaporators, for AGZ 010BM – 034BM

Suction

Inlet

30.2

(767)

8.2 (208)

10.2 (260)

1.2

(30)

.35

(9)

3.5

(90)

3.5

(90)

Temp Sen sor

1.2

(30)

Liquid

Outlet

AGZ

Model

010 013 017 020 025 029 034

Liquid Line Conn.

Brazed, in (L).

1.125 2.125 0.75 2.0 3.6 (91)

1.125 2.125 0.75 2.0 6.0 (153)

1.125 2.125 0.75 2.0 7.1 (181)

1.125 2.125 0.75 2.0 7.7 (195)

1.125 2.125 0.75 2.0 10.6 (271)

1.375 2.125 0.75 2.0 13,8 (351)

1.375 2.125 0.75 2.0 19.0 (483)

Suction Line Conn.

Brazed, in (S).

Temp. Sensor

NPT, in. (TS)

Victaulic

Water Conn.

In. (W)

Dimension

“A”

in. (mm)

Catalog ACZ-AGZB1-1

ACZ/AGZ Dimensions and Weights

Table 37, ACZ-BS Dimensions and Weights

SIZE

010-013B

016B 020B 025B 028B 033B 039B

CENTER OF GRAVITY LIFTING WEIGHTS (LBS) CONNECTION SIZES (IN. O.D.)ACZ

X Y Z

27.50 21.70 22.90 1000 1015 369 379 124 128 1.125 0.875 0.625

26.50 21.60 23.40 1065 1090 421 416 115 113 1.625 0.875 0.625

26.60 21.80 23.30 1150 1190 454 449 124 123 1.625 0.875 0.625

38.50 21.90 23.30 1370 1420 501 498 186 185 1.625 0.875 0.625

38.50 19.10 23.30 1390 1445 508 505 189 188 1.625 0.875 0.625

41.00 23.00 23.30 1565 1625 540 538 244 243 1.625 0.875 0.875

34.60 24.00 22.40 1975 2050 753 807 201 215 2.125 0.875 0.875

Table 38, ACZ-BS Mounting Weights

ACZ SIZE

010-013B

016B 020B 025B 028B 033B 039B

MOUNTING CORNER WEIGHTS (LBS.)

LF RF LB RB

257 264 236 243 290 286 246 243 312 309 266 263 446 443 241 240 453 449 245 243 488 487 296 295 656 703 297 318

Table 39, AGZ 010BS - 034BS, Packaged Chiller, Dimensions and Weights

AGZ UNIT SIZE

010B 013B 017B 020B 025B 029B 034B

CENTER OF GRAVITY

(IN.)

X Y Z

28.00 21.50 23.40 1085 1095 398 392 149 147 2 279 275 267 263

27.40 21.40 23.90 1170 1190 452 426 150 141 2 315 297 288 271

27.50 21.60 24.00 1280 1300 493 463 167 157 2 344 323 316 297

38.50 21.80 23.90 1505 1525 564 534 209 198 2 502 475 271 257

39.50 19.40 24.00 1610 1635 593 554 239 224 2 531 496 301 282

41.00 22.75 24.20 1800 1830 645 595 291 269 2 583 238 353 326

35.60 23.70 23.50 2270 2315 890 869 259 253 2 779 761 369 361

Table 40, AGZ 010BM - 034BM, Remote Evaporator, Dimensions and Weights

AGZ

REMOTE

EVAP.

010B 013B 017B 020B 025B 029B 034B

CENTER OF GRAVITY

(IN.)

X Y Z

27.50 21.70 22.90 1000 1015 369 379 124 128 1.125 0.875 0.625

26.50 21.60 23.40 1065 1090 421 416 115 113 1.625 0.875 0.625

26.60 21.80 23.30 1150 1190 454 449 124 123 1.625 0.875 0.625

38.50 21.90 23.30 1370 1420 501 498 186 185 1.625 0.875 0.625

38.50 19.10 23.30 1390 1445 508 505 189 188 1.625 0.875 0.625

41.00 23.00 23.30 1565 1625 540 538 244 243 1.625 0.875 0.875

34.60 24.00 22.40 1975 2050 753 807 201 215 2.125 0.875 0.875

SHIP WT.

(LBS)

SHIP WT.

(LBS)

SHIP

WT.

(LBS)

OPN. WT.

(LBS)

OPN. WT.

(LBS)

OPN.

WT.

(LBS)

LF RF LB RB SUCTION LIQUID

RBI

Control

LBI

LIFTING WEIGHTS (LBS)

LF RF LB RB

LIFTING WEIGHTS (LBS) CONNECTION SIZES (IN. O.D.)

LF RF LB RB SUCTION LIQUID

EVAP.

CONN.

(IN.)

VICTAULIC

MOUNTING CORNER WEIGHTS

LF RF LB RB

HOT GAS

RFI

Panel

LFI

(LBS.)

HOT GAS

BYPASS

Table 41, AGZ 010BM - 034BM, Mounting Weights

REMOTE

EVAP

010B 013B 017B 020B 025B 029B 034B

52 Catalog ACZ-AGZB1-1

MOUNTING CORNER WEIGHTS (LBS.)AGZ

LF RF LB RB

257 264 236 243 290 286 246 243 312 309 266 263 446 443 241 240 453 449 245 243 488 487 296 295 656 703 297 318

Application Data

Unit Placement

ACZ/AGZ units are for outdoor applications and can be mounted either on a roof or at ground level. For roof mounted applications, install the unit on a steel channel or I-beam frame to support the unit above the roof. For ground level applications, install the unit on a substantial base that will not settle. Use a one-piece concrete slab with footings extended below the frost line. Be sure the foundation is level within 1/2" (13mm) over its length and width. The foundation must be strong enough to support the weights listed in the Dimension and Weight Tables on page

Clearances

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

Install the unit with enough side clearance for air entrance to the coil and for servicing. Provide service access to the evaporator, compressors, electrical control panel and piping components as shown in Figure 19. Do not block access to the unit with piping or conduit.

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

52.

Figure 19, Clearances

SEE TABLE 32

DIMENSION “A”

4 FT. (1220mm) CLEARANCE FOR

SERVICE ACCESS

SEE TABLE 32

DIMENSION “A”

The recommended minimum side clearance between two units is 8 feet (2440mm).

The unit must not be installed in a pit or enclosure that is deeper or taller than the height of the unit unless extra space is provided. The minimum clearance on each side of the unit is 6 feet (1828mm) when installed in a pit. The pit cannot be deeper than the unit.

4 FT. (1220) CLEARANCE FOR

SERVICE ACCESS

Catalog ACZ-AGZB1-1

The minimum clearance to a side wall or building taller than the unit height is 6 feet (1828mm) provided no solid wall above 6 feet (1828mm) tall is closer than 12 feet (3658mm) to the opposite side of the unit.

Refrigerant Piping

Models ACZ BS condensing units and AGZ-BM chillers with remote evaporators require field refrigerant piping. Proper refrigerant piping makes the difference between a reliable or an inefficient problematic system. The primary concerns related to piping are refrigerant pressure drop, a solid liquid feed to the expansion valves, continuous oil return and properly sized refrigerant specialties.

The recommended source for refrigerant piping techniques and sizing is the ASHRAE 2002 Refrigeration Handbook, chapter #2.

Refrigerant specialties including the expansion valves, solenoid valves, filter drier and sight glasses for use with the remote evaporator applications are supplied and installed by the installing contractor. The remaining components including pipe, insulation, fittings and Schrader valves are also provided and piped by the installer. The optional hot gas bypass valve with solenoid valve can be provided as a field installed or factory installed option. A holding charge of R-22 or R-407C is provided for the unit. The installer must properly evacuate the piping system and provide the operating charge of refrigerant.

Although conflicting piping recommendations can be found in different sources, McQuay offers the following recommendations for these controversial issues.

The use of double risers for vertical gas risers is generally not required and should be used only as a last resort to maintain the minimum refrigerant flow to carry oil up the vertical risers. Slightly downsizing the vertical riser is a superior option to providing double risers.

Slope the refrigerant lines 1” per 10 feet of horizontal run in the direction of refrigerant flow to assist oil return.

Resist using hot gas bypass for applications when operation in ambient temperature below 40 degrees is expected. This recommendation helps to maintain adequate condensing pressures and liquid refrigerant at the expansion valve at maximum condenser capacity.

Pressure drops in the refrigerant lines should be maintained at or below the ASHRAE recommendations and line lengths should be made as short as possible. Exceeding these recommendations will decrease performance and could impact reliability.

Small traps should be provided at the base of each major vertical gas riser to assist in the collection of oil. If vertical risers exceed more than 25 feet, install a small trap at the midpoint and not to exceed more than 20 feet intervals.

Use caution in sizing the liquid line in applications where the evaporator is above the outdoor section. The weight of the liquid refrigerant in the vertical column will decrease the pressure at the top of the riser (approximately .5 PSI per foot of vertical rise) allowing some of the refrigerant to flash to a gas. Adequate refrigerant subcooling is needed at the outdoor section to prevent large volumes of refrigerant gas at the expansion valve.

It is recommended that the piping systems always extend above the highest component in the refrigeration system before dropping down to make the final refrigerant connections to components. This practice will hinder the draining of condensed refrigerant to the lower component when normal shutdown procedures do not occur (such as a power failure).

NOTE: Do not run refrigerant piping underground.

Chilled Water System Water Piping

Local authorities can supply the installer with the proper building and safety codes required for proper installation.

Install piping with minimum bends and changes in elevation to minimize pressure drop. Consider the following when installing water piping:

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

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

54 Catalog ACZ-AGZB1-1

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

the system.

4. Maintaining adequate system water pressure (expansion tank or regulating valve).

5. Temperature and pressure indicators located at the unit to aid in unit servicing. Pressure gauge taps must be

installed in the chilled water inlet and outlet piping or as shown in Figure 4.

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

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

7. A 40-mesh strainer is required in the water line just before the inlet of the evaporator. This will help prevent

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

8. The brazed plate evaporator has a thermostat and heating cable to prevent freeze-up down to -20F (-29C).

The heating cable should be wired to a separate 110V supply circuit. As shipped from the factory, the heating cable is wired to the control circuit. Protect all water piping to the unit from freezing.

CAUTION

If a separate disconnect is used for the 110V supply to the evaporator heating cable, mark the disconnect clearly so the disconnect is not accidentally shut off during cold seasons. Failure to do so can cause a failure of the evaporator.

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

thoroughly before unit installation. Perform regular water analysis and chemical water treatment on the evaporator immediately at equipment start-up.

10. When glycol is added to the water system for freeze protection, the refrigerant suction pressure will be

lower, cooling performance less, and water side pressure drop greater. If the percentage of glycol is high, or if propylene is used instead of ethylene glycol, the added pressure drop and loss of performance could be substantial. Reset the freezestat and low leaving water alarm temperatures. The freezestat is factory set to default at 38F (3.3C). Reset the freezestat setting to approximately 4 to 5 degrees F (2.3 to 2.8 degrees C) below the leaving chilled water setpoint temperature. See the section titled “Glycol Solutions” on page

for additional information concerning glycol.

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

12. Include a vapor barrier on the piping insulation to prevent condensation and possible damage to the

building structure.

Figure 20, Typical Field Evaporator Water Piping

Vent

Strainer

Inlet

Outlet

Drain

NOTES:

Chilled water piping within the unit enclosure must be insulated in the field.

Support piping independently of the unit and install per local codes.

Vibration

Eliminators

Flow

Switch

Isolation

Valves

System 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 associated piping. If the water volume is too low, operational problems can occur, including rapid

Catalog ACZ-AGZB1-1

compressor cycling, rapid loading and unloading of compressors, erratic refrigerant flow in the chiller, improper motor cooling, shortened equipment life and other undesirable occurrences.

For normal comfort cooling applications, where the cooling load changes relatively slowly, we recommend a minimum system volume of three to four times the flow rate (GPM). For example, if the design chiller flow rate is 120 GPM, we recommend a minimum system volume of 360 to 480 gallons.

Since there are many other factors that can influence performance, systems may successfully operate below these suggestions. However, as the water volume decreases below these suggestions, the possibility of problems increases.

Variable Chilled Water flow

Variable chilled water flow systems are not recommended for this class of equipment due to limited unloading capability.

Flow Switch

Mount a water flow switch in the leaving water line to shut down the unit when water flow is interrupted.

A flow switch is available from McQuay (part number 017503300). It is a “paddle” type switch and adaptable to pipe sizes down to 1 1/4” (32mm) nominal. Certain minimum flow rates are required to close the switch and are listed in

Table 42. Install the switch as shown in Figure 21. Connect the normally open contacts of the flow switch in the unit control center at terminals 4 and 5. There is also a set of normally closed contacts on the switch that can be used for an indicator light or an alarm to indicate when a “no-flow” condition exists. Freeze protect any flow switch that is installed outdoors. Follow installation instructions provided with the flow switch. Calibrate the flow switch to open at one-half of nominal flow rate.

Figure 21, Flow Switch Installation

NOTE: Differential pressure switches are not recommended for outdoor installation. They are subject to damage from freezing.

Table 42, Flow Switch Settings

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

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

(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.

Water Connections

The unit has 3-inch holes for the chilled water piping to enter the unit. The connections are made to the evaporator water connections located within the unit. Chilled water piping within the unit must be insulated.

56 Catalog ACZ-AGZB1-1

Operating/Standby Limits

Maximum standby ambient air temperature, 130°F (54.4°C) Maximum operating ambient air temperature, 115F (46.1C) Minimum operating ambient temperature (standard), 35°F (2°C) Minimum operating ambient temperature (with optional low-ambient control), 0°F (-18°C)

Vibration Isolators

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

The unit should be initially on shims or blocks at the listed free height. When all piping, wiring, flushing, charging, etc. is completed, the springs are adjusted upward to loosen the blocks or shims that are then removed.

A rubber anti-skid pad is part of the isolator. Installation of spring isolators requires flexible piping connections and at least three feet of flexible conduit to avoid straining the piping and transmitting vibration and noise.

Isolator Installation

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

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

Isolator Dimensions

Isolator dimensions are on the following page.

Table 43 Corner Operating Weights

ACZ-BS (lbs)

ACZ RF LF RB LB

259 257 243 241

010

259 257 243 241

013

353 360 251 256

016

377 383 288 292

020

498 505 232 235

025

508 515 232 235

028

605 567 304 284

033

712 649 313 286

039

AGZ-BM (lbs)

AGZ LF RF LB RB 010A 013A 017A 020A 025A 029A 034A

RBI

RFI

Control

Panel

LBI

LFI

257 264 236 243 290 286 246 243 312 309 266 263 446 443 241 240 453 449 245 243 488 487 296 295 656 703 297 318

AGZ-BS (lbs)

AGZ RF LF RB LB 010A

013A 017A 020A 025A 029A 034A

243 262 243 262 358 390 284 310 374 410 319 349 525 570 253 274 539 594 259 286 628 647 324 334 731 747 348 356

Catalog ACZ-AGZB1-1

Figure 22 Isolator Dimensions RP-3, Neoprene-in Shear Isolator CP-1, Spring Isolator

Optional Features

Controls

Hot Gas Bypass

Hot gas bypass permits unit operation down to appromately10% of full load capacity. This option includes a factory-installed hot gas bypass valve, solenoid valve, and manual shutoff valve for each circuit. Interconnecting piping to the evaporator is field installed on Model ACZ and AGZ-BM remote evaporator chillers.

Head Pressure Control

Optional SpeedTrol head pressure allows unit operation down to 0°F (-18°C). (Not available on 380 volt, 60 Hertz units.). Fan cycling is standard.

Evaporator Water Flow Switch

Factory-mounted and wired flow switch on AGZ-BS only.

Alarm Bell

Field installed and wired to the control panel to provide remote indication of unit alarm condition.

Remote Operator Interface Panel

A remote interface panel, field-wired to the unit, providing all the data viewable on the unit’s controller, including alarm clearing and setpoint change capability. See page

9 for details.

BAS Interface (Open Choices)

A module is factory installed on the MicroTech II controller to provide direct interface to the following standard protocols: Also available as a field-installed kit.

BACnet MS/TP BACnet Ethernet BACnet IP

ONTALK (FTT-10A) Modbus

58 Catalog ACZ-AGZB1-1

Unit

Vibration Isolators

Spring or neoprene-in-shear vibration isolators are available for field installation to reduce vibration transmission through the unit base.

Louvers/Hail Guard/Wind Baffles

Louvers covering the coil only, which due to the unit design, effectively encloses the entire unit.

Copper Fin Condenser Coils

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

Black Fin Coils

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

Coated Fins

Copper or aluminum fins coated with ElectroFin baked epoxy protective coating with 5000-hour salt spray resistance (ASTM B117-90).

Sound Reduction

Acoustical blankets are factory-installed on each compressor. They are also available for retrofit field installation.

Discharge Shut-off Valve

Factory-mounted discharge shut-off valve.

Double Evaporator Insulation

Double insulation for low temperature chilled fluid applications or extreme high humidity locations.

Electrical

Disconnect Switch with Through-the-Door Handle

A factory-installed option for service use, non-fused disconnect switch (mounted inside the power section of the control box) with a through-the-door handle.

High Interrupt Current Disconnect Switch

Factory-installed option with through-the-door handle

High Short Circuit Current Rating with Disconnect Switch

Factory-installed option with through-the-door handle

Phase Loss/Voltage Protection

(P/N 350015201) Phase loss with under/over voltage protection and multiple LED indication of fault type is available as a factory installed option to guard against compressor motor burnout.

Catalog ACZ-AGZB1-1

Product Specification

Specifications are available in MSWord format. Contact the local McQuay sales office.

SECTION 15XXX

AIR-COOLED SCROLL COMPRESSOR CONDENSING UNITS

ACZ 010B-ACZ 039B

PART 1 - GENERAL

1.01 SUMMARY Section includes design, performance criteria, refrigerants, controls, and installation requirements for air-cooled

scroll compressor condensing units.

1.02 REFERENCES Comply with applicable Standards/Codes of ARI 365-94, ANSI/ASHRAE 15, ETL, cETL, NEC, and OSHA as adopted by the State. Units shall meet the efficiency standards of ASHRAE Standard 90.1.

1.03 SUBMITTALS A. Submit shop drawings and product data in accordance with the specifications. B. Submittals shall include the following:

Dimensioned plan and elevation view drawings, required clearances, and location of all field

1. connections.

Summary of all auxiliary utility requirements, such as electricity, water, compressed air, etc.

2. Summary shall indicate quality and quantity of each required utility.

Single-line schematic drawing of the power field hookup requirements, indicating all items that

3. are furnished.

Schematic diagram of control system indicating points for field interface/connection.

Diagram shall fully delineate field and factory wiring.

Installation manuals.

1.04 QUALITY ASSURANCE A. Qualifications: Equipment manufacturer must specialize in the manufacture of the type of products

specified and have five years experience with similar equipment and refrigerant offered. B. Regulatory Requirements: Comply with the codes and standards specified. C Manufacturer's plant must be ISO Registered.

60 Catalog ACZ-AGZB1-1

1.05 DELIVERY AND HANDLING A. Condensing units shall be delivered to the job site assembled and charged with a holding charge of

refrigerant and full oil charge by the manufacturer.

B. Comply with the manufacturer's instructions for rigging and handling equipment.

1.06. WARRANTY The refrigeration equipment manufacturer’s guarantee shall be for a period of one year from date of equipment start-up but not more than 18 months from shipment. The guarantee shall provide for repair or replacement due to failure by material and workmanship that prove defective within the above period, excluding refrigerant.

1.07 MAINTENANCE Maintenance of the units shall be the responsibility of the owner and performed in accordance with the manufacturer’s instructions.

PART 2--PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS A. McQuay International B. (Approved Equal)

2.02 UNIT DESCRIPTION Provide and install as shown on the plans factory-assembled, air-cooled, scroll compressor condensing units in the size and quantity specified. Each unit shall consist of a hermetic tandem scroll compressor set, air-cooled condenser section, control system and all components necessary for controlled unit operation when field piped and wired to low side equipment specified elsewhere.

2.03 DESIGN REQUIREMENTS A. General: Provide a complete scroll-compressor condensing unit as specified herein and as shown on the

drawings. The unit shall be in accordance with the standards referenced in section 1.02 and any local codes in effect.

Performance: Refer to the schedule of performance on the drawings. The unit shall be capable of stable

operation to a minimum of 50 percent of full load without hot gas bypass. Performance shall be in accordance with ARI Standard 365-94.

C. Acoustics: Sound pressure levels for the unit shall not exceed the following specified levels. The

manufacturer shall provide the necessary sound treatment to meet these levels if required. Sound data shall be provided with the quotation. Test shall be in accordance with ARI Standard 370.

Catalog ACZ-AGZB1-1

Octave Band

63 125 250 500 1000 2000 4000 8000 dBA

____ ____ ____ ____ ____ ____ ____ ____ ____

2.04 CONDENSING UNIT COMPONENTS A. Compressors: The compressors shall be sealed hermetic scroll type with crankcase oil heater and suction

strainer. Compressor shall have a forced-feed lubrication system with integral oil pump and oil charge. The compressor motor shall be refrigerant gas cooled, high torque, hermetic induction type, two-pole, with inherent thermal protection on all three phases and shall be mounted on RIS vibration isolator pads.

B. Condenser: The condenser coils shall consist of seamless copper tubes mechanically bonded into

aluminum plate-type fins. The fins shall have full drawn collars to completely cover the tubes. A subcooling coil shall be an integral part of the main condenser coil. Condenser fans shall be propeller type arranged for vertical air discharge and individually driven by direct-drive fan motors. They shall be equipped with a heavy-gauge fan guard. Fan motors shall be TEAO, three-phase, direct-drive, 1140 rpm. The condenser coil shall be protected by a full-area, epoxy-coated, wire mesh screen.

D. Refrigerant Circuit: Capped connections shall be provided for field connection of refrigerant piping.

Refrigerant specialties shall be field supplied and installed.

Control System: A centrally located weatherproof control panel shall contain the field power connection

points, control interlock terminals, and control system. Power and starting components shall include factory short circuit protection of fan motors and control circuit, individual contactors for each fan motor, solid-state compressor three-phase motor overload protection, inherent fan motor overload protection and unit power connections for connection to remote disconnect switch. Hinged access doors shall be tool-lockable. Barrier panels or separate doors are required to protect against accidental contact with line voltage when accessing the control system.

An advanced DDC microprocessor unit controller with a 4-line by 20-character liquid crystal display

provides the operating and protection functions. The controller shall be capable of receiving a 4 to 20 mA signal for demand limiting and be remotely enabled with a digital input. The controller shall take pre-emptive limiting action in case of high discharge pressure or low evaporator pressure. The controller shall contain the following features as a minimum:

Equipment Protection The unit shall be protected in two ways: (1) by alarms that shut the unit down and require manual reset to restore unit operation and (2) by limit alarms that reduce unit operation in response to some out-of-limit condition. Shut down alarms shall activate an alarm signal.

Shutdown Alarms

 Low evaporator pressure  High condenser pressure  Motor protection system  Phase voltage protection (Optional)  Outside ambient temperature  Sensor failures

62 Catalog ACZ-AGZB1-1

Limit Alarms

 Condenser pressure stage down, unloads at high discharge pressures  Low ambient lockout, shuts off unit at low ambient temperatures  Low evaporator pressure hold, holds stage #1 until pressure rises  Low evaporator pressure unload, shuts off one compressor

Unit Enable Selection

Enables unit operation from either local keypad, digital input, or BAS

Unit Mode Selection

Selects standard cooling or test operation mode

Digital Inputs

 Unit off switch  Remote start/stop  Motor protection

Digital Outputs

 Shutdown alarm; field wired, activates on an alarm condition, off when alarm is cleared

Condenser fan control

The unit controller shall provide control of condenser fans based on compressor discharge pressure.

Building Automation System (BAS) Interface

Factory mounted DDC controller(s) shall support operation on a BACnet®, Modbus® or

ONMARK® network via one of the data link / physical layers listed below as specified by

L the successful Building Automation System (BAS) supplier.

 BACnet IP  BACnet MS/TP master (Clause 9)  BACnet ISO 8802-3, (Ethernet)  LONMARK FTT-10A. The unit controller shall be LONMARK® certified.  Modbus

The information communicated between the BAS and the factory mounted unit controllers shall include the reading and writing of data to allow unit monitoring, control and alarm notification as specified in the unit sequence of operation and the unit points list.

For chillers communicating over a L eXternal Interface File (XIF) shall be provided with the chiller submittal data.

All communication from the chiller unit controller as specified in the points list shall be via standard BACnet objects. Proprietary BACnet objects shall not be allowed. BACnet communications shall conform to the BACnet protocol (ANSI/ASHRAE135-2001). A BACnet Protocol Implementation Conformance Statement (PICS) shall be provided along with the unit submittal.

2.05 OPTIONS AND ACCESSORIES

The following options are to be included:

ONMARK network, the corresponding LONMARK

 Hot gas bypass to allow unit operation to 10 percent of full load  Low ambient head pressure control to 0°F (-17.8°C)  Non-fused disconnect switch with through-the-door handle  High interrupt current rated disconnect switch  High short circuit current rating with disconnect switch  Phase loss/voltage monitor  Aluminum fins pre-coated with a phenolic epoxy coating with 1000 hour salt spray rating (ASTM B117-90  Copper fin condenser coils

Catalog ACZ-AGZB1-1

 ElectroFin baked epoxy coating providing 5000+ hour salt spray resistance (ASTM B117-90) and is

applied to both the coil and the coil frames.

 Spring vibration isolators for field installation  Neoprene-in-shear vibration isolators for field installation  Louvers for the coil sides of the unit  Remote operator interface panel  Alarm bell for field installation  BAS interface module for standard protocols  Sound reduction blankets for compressors  Discharge shut-off valve

PART 3 - EXECUTION

3.01 INSTALLATION

A. Install in strict accordance with manufacturer’s requirements, shop drawings, and contract documents. B. Adjust and level unit in alignment on supports. C. Coordinate electrical installation with electrical contractor. D Coordinate controls with control contractor. E. Provide all appurtenances required for a fully operational and functional unit.

3.02 START-UP

A. Install proper charge of refrigerant and oil. B. Provide testing and starting of machine, and instruct the Owner in its proper operation and maintenance.

64 Catalog ACZ-AGZB1-1

Specifications are available in MSWord format. Contact the local McQuay sales office.

SECTION 15XXX

AIR-COOLED SCROLL COMPRESSOR CHILLERS

AGZ 010BS-AGZ 034BS

PART 1 - GENERAL

1.01 SUMMARY Section includes design, performance criteria, refrigerants, controls, and installation requirements for air-cooled scroll compressor chillers.

1.02 REFERENCES Comply with applicable and current Standards/Codes of ARI 550/590, ANSI/ASHRAE 15, ETL, cETL, NEC,

and OSHA as adopted by the State. Units shall meet the efficiency standards of ASHRAE Standard 90.1.

1.03 SUBMITTALS A. Submit shop drawings and product data in accordance with the specifications.

B. Submittals shall include the following:

Dimensioned plan and elevation view drawings, required clearances, and location of all field

1. connections.

Summary of all auxiliary utility requirements, such as electricity, water, compressed air, etc.

2. Summary shall indicate quality and quantity of each required utility.

Single-line schematic drawing of the power field hookup requirements, indicating all items that

3. are furnished.

Schematic diagram of control system indicating points for field interface/connection.

Diagram shall fully delineate field and factory wiring.

Certification of factory-run test of chiller unit signed by company officer.

Installation manuals.

1.04 QUALITY ASSURANCE A. Qualifications: Equipment manufacturer must specialize in the manufacture of the products specified

and have five years experience with the type equipment and refrigerant offered. B. Regulatory Requirements: Comply with the codes and standards specified. C. Chiller manufacturer plant must be ISO9002 Registered.

1.05 DELIVERY AND HANDLING A. Chillers shall be delivered to the job site completely assembled and charged with refrigerant and oil by

the manufacturer.

B. Comply with the manufacturer's instructions for rigging and handling equipment.

1.06. WARRANTY The refrigeration equipment manufacturer’s guarantee shall be for a period of one year from date of equipment

start-up but not more than 18 months from shipment. The guarantee shall provide for repair or replacement due to failure by material and workmanship that prove defective within the above period, excluding refrigerant.

1.07 MAINTENANCE Maintenance of the chillers shall be the responsibility of the owner and performed in accordance with the

manufacturer’s instructions.

Catalog ACZ-AGZB1-1

PART 2--PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS A. McQuay International

B. (Approved Equal)

2.02 UNIT DESCRIPTION Provide and install as shown on the plans factory-assembled, factory-charged, and factory-tested air-cooled scroll

compressor packaged chillers in the quantity specified. Each chiller shall consist of hermetic tandem scroll compressors, direct expansion evaporator, air-cooled condenser section, microprocessor-based control system and all components necessary for controlled unit operation.

2.03 DESIGN REQUIREMENTS A. General: Provide a complete scroll compressor packaged chiller as specified herein and as shown on the

drawings. The unit shall be in accordance with the standards referenced in section 1.02 and any local codes in effect.

Performance: Refer to the schedule of performance on the drawings. The chiller shall be capable of

stable operation to a minimum of 50 percent of full load without hot gas bypass. Performance shall be in accordance with ARI Standard 550/590.

C. Acoustics: Sound pressure levels for the unit shall not exceed the following specified levels. The

manufacturer shall provide the necessary sound treatment to meet these levels if required. Sound data shall be provided with the quotation. Test shall be in accordance with ARI Standard 370.

Octave Band

63 125 250 500 1000 2000 4000 8000 dBA _____ _____ _____ _____ _____ _____ _____ _____ _____

2.04 CHILLER COMPONENTS A. Compressors: The compressors shall be sealed hermetic scroll type with crankcase oil heater and suction

strainer. Compressor shall have a forced-feed lubrication system with a reversible oil pump and oil charge. The compressor motor shall be refrigerant gas cooled, high torque, hermetic induction type, twopole, with inherent thermal protection on all three phases and shall be mounted on RIS vibration isolator pads.

B. Evaporators

The evaporator shall be a compact, high efficiency, single circuit, brazed plate-to-plate type heat exchanger consisting of parallel stainless steel plates. The evaporator shall be protected with an electric resistance heater and insulated with 3/4"(19mm) thick closed-cell polyurethane insulation. This combination shall provide freeze protection down to -20°F (29°C) ambient air temperature. The water-side working pressure shall be a minimum of 350 psig (2413 kPa). Vent and drain connections shall be provided in the inlet and outlet chilled water piping by the installing contractor. Evaporators shall be Underwriters Laboratories (UL) listed

C. Condenser: The condenser coils shall consist of 3/8 inch (10mm) seamless copper tubes mechanically

bonded into plate-type fins. The fins shall have full drawn collars to completely cover the tubes. A

66 Catalog ACZ-AGZB1-1

subcooling coil shall be an integral part of the main condenser coil. Condenser fans shall be propeller type arranged for vertical air discharge and individually driven by direct-drive fan motors. They shall be equipped with a heavy-gauge fan guard. Fan motors shall be TEAO, three-phase, direct-drive, 1140 rpm. The condenser coil shall be protected by a full-area, epoxy-coated, wire mesh screen.

D. Refrigerant Circuit: The refrigerant circuit shall include a refrigerant filter-drier, sight glass with

moisture indicator, liquid line solenoid valve (no exceptions), thermal expansion valve, and insulated suction line.

Control System: A centrally located weatherproof control panel shall contain the field power connection

points, control interlock terminals, and control system. Power and starting components shall include factory circuit breaker of fan motors and control circuit, individual contactors for each fan motor, solidstate compressor three-phase motor overload protection, inherent fan motor overload protection and unit power terminal blocks for connection to remote disconnect switch. Terminals shall also be provided for power supply to the evaporator heater circuit. Hinged access doors shall be lockable. Barrier panels or separate enclosures are required to protect against accidental contact with line voltage when accessing the control system.

An advanced DDC microprocessor unit controller with a 4-line by 20-character liquid crystal display

provides the operating and protection functions. The controller shall take pre-emptive limiting action in case of high discharge pressure or low evaporator pressure. The controller shall contain the following features as a minimum:

Equipment Protection

The unit shall be protected in two ways: (1) by alarms that shut the unit down and require manual reset to restore unit operation and (2) by limit alarms that reduce unit operation in response to some out-of-limit condition. Shut down alarms shall activate an alarm signal.

Shutdown Alarms

No evaporator water flow Sensor failures Low evaporator pressure Evaporator freeze protection High condenser pressure Outside ambient temperature Motor protection system Phase voltage protection (Optional)

Limit Alarms

Condenser pressure stage down, unloads unit at high discharge pressures Low ambient lockout, shuts off unit at low ambient temperatures Low evaporator pressure hold, holds stage #1 until pressure rises Low evaporator pressure unload, shuts off one compressor

Unit Enable Selection

Enables unit operation from either local keypad, digital input, or BAS

Unit Mode Selection

Selects standard cooling, ice, glycol, or test operation mode

Analog Inputs

Reset of leaving water temperature, 4-20 mA

Digital Inputs

 Unit off switch  Remote start/stop  Flow switch  Ice mode switch, converts operation and setpoints for ice production  Motor protection

Catalog ACZ-AGZB1-1

Digital Outputs

 Shutdown alarm; field wired, activates on an alarm condition, off when alarm is cleared  Evaporator pump; field wired, starts pump when unit is set to start

Condenser fan control

The unit controller shall provide control of condenser fans based on discharge pressure.

Building Automation System (BAS) Interface

Factory mounted DDC controller(s) shall support operation on a BACnet®, Modbus® or

ONMARK ® network via one of the data link / physical layers listed below as specified by

L the successful Building Automation System (BAS) supplier.

 BACnet IP  BACnet MS/TP master (Clause 9)  BACnet ISO 8802-3, (Ethernet)  LONMARK FTT-10A. The unit controller shall be LONMARK ® certified.

For chillers communicating over a LONMARK network, the corresponding L eXternal Interface File (XIF) shall be provided with the chiller submittal data.

2.05 OPTIONS AND ACCESSORIES The following options are to be included:

 Hot gas bypass to allow unit operation to 10 percent of full load  Low ambient head pressure control to 0°F (-17.8°C)  Non-fused disconnect switch with through-the-door handle  High interrupt disconnect switch  High short circuit current rating with disconnect swirch  Phase loss/voltage protection  Aluminum fins shall be pre-coated with a phenolic epoxy coating with 1000 hour salt spray rating (ASTM

B117-90

 Copper fin condenser coils  ElectroFin baked epoxy coating providing 5000+ hour salt spray resistance (ASTM B117-90) and is

applied to both the coil and the coil frames.

 Chilled water flow switch to be field mounted in the chilled water line and field wired to terminals in the

control panel.

 Spring vibration isolators for field installation  Rubber-in-shear vibration isolators for field installation  Double evaporator insulation  Compressor sound reduction package  Alarm bell for field mounting and wiring  Remote operator interface  BAS interface module for Modbus, BACnet w/MSTP, BACnet w/ Ethernet, LONMARK

PART 3 - EXECUTION

3.01 INSTALLATION A. Install in strict accordance with manufacturer’s requirements, shop drawings, and contract documents. B. Adjust and level chiller in alignment on supports. C. Coordinate electrical installation with electrical contractor. D. Coordinate controls with control contractor.

3.02 START-UP A. Provide testing and starting of machine, and instruct the Owner in its proper operation and maintenance.

ONMARK

68 Catalog ACZ-AGZB1-1

AIR-COOLED SCROLL COMPRESSOR CHILLERS

PART 1 - GENERAL

1.01 SUMMARY Section includes design, performance criteria, refrigerants, controls, and installation requirements for air-cooled scroll compressor chillers.

1.02 REFERENCES Comply with applicable Standards/Codes of ARI 550/590-2003, ANSI/ASHRAE 15, ETL, cETL, , ASHRAE

Standard 90.1, and OSHA as adopted by the State.

1.03 SUBMITTALS A. Submit shop drawings and product data in accordance with the specifications.

B. Submittals shall include the following:

Dimensioned plan and elevation view drawings, required clearances, and location of all field

1. connections.

Summary of all auxiliary utility requirements such as: electricity, water, compressed air, etc.

2. Summary shall indicate quality and quantity of each required utility.

Single line schematic drawing of the power field hookup requirements, indicating all items that

WITH REMOTE EVAPORATOR

AGZ 010BM- AGZ 034BM

are furnished.

Schematic diagram of control system indicating points for field interface/connection.

Field installed refrigerant piping diagram with line sizes and refrigeration specialties shown.

Diagram shall fully delineate field and factory wiring.

Installation manuals.

1.04 QUALITY ASSURANCE A. Qualifications: Equipment manufacturer must specialize in the manufacture of the products specified

and have five years experience with the equipment and refrigerant offered. B. Regulatory Requirements: Comply with the codes and standards specified. C. Chiller manufacturer plant must be ISO9002 Registered.

1.05 DELIVERY AND HANDLING A. The outdoor section shall be delivered to the job site with a holding charge.

B. Comply with the manufacturers instructions for rigging and handling equipment.

1.06. WARRANTY The refrigeration equipment manufacturer’s warranty shall be for a period of one year from date of equipment

start up but not more than 18 months from shipment. The warranty shall cover material and workmanship that prove defective within the above period and resultant loss of refrigerant.

1.07 MAINTENANCE Maintenance of the chillers shall be the responsibility of the owner and performed in accordance with the

manufacturer’s instructions.

PART 2--PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS A. McQuay International

B. (Approved Equal)

Catalog ACZ-AGZB1-1

2.02 UNIT DESCRIPTION Provide and install as shown on the air-cooled scroll compressor chiller systems in the quantity specified. Each

system shall consist of hermetic tandem scroll compressors, air-cooled condenser section, control system and all components necessary for controlled unit operation. A single-circuit, direct expansion, insulated evaporator shall be provided for remote location and be installed and piped to the outdoor unit by the installing contractor.

2.03 DESIGN REQUIREMENTS A. General: Provide a complete scroll compressor chiller system consisting of an outdoor compressor-

condenser section and a remote indoor evaporator as specified herein and as shown on the drawings. The unit shall be in accordance with the standards referenced in section 1.02 and any local codes in effect.

B. Performance: Refer to the schedule of performance on the drawings. The chiller shall be able to operate

to at least 25 percent of full load without hot gas bypass.

C. Acoustics: Sound pressure levels for the unit shall not exceed the following specified levels. The

manufacturer shall provide the necessary sound treatment to meet these levels if required. Sound data shall be provided with the quotation and be measured at 30 feet from the unit and one meter above the unit base line

Octave Band

63 125 250 500 1000 2000 4000 8000 dBA _____ _____ _____ _____ _____ _____ _____ _____ _____

2.04 CHILLER COMPONENTS A. Compressors: The compressors shall be tandem hermetic scroll type with discharge service valve,

crankcase oil heater and suction strainer. Compressors shall have a forced feed lubrication system with a reversible oil pump and factory oil charge. The compressor motors shall be refrigerant gas cooled, high torque, hermetic induction type, two-pole, with inherent thermal protection on all three phases and shall be mounted on RIS vibration isolator pads.

B. Remote Evaporator: Units shall have a direct expansion type brazed-plate evaporator with stainless steel

plates brazed together with copper. It shall be insulated with 3/4 inch (19mm) closed cell polyurethane insulation and be heated with an electric heater to provide freeze protection to -20°F (-29°C) ambient temperature. The evaporator must be UL listed.

C. Condenser: The condenser coils shall consist of 3/8 inch (10mm) seamless copper tubes mechanically

bonded into plate type fins. The fins shall have full drawn collars to completely cover the tubes. A subcooling coil shall be an integral part of the main condenser coil. Condenser fans shall be propeller type arranged for vertical air discharge and individually driven by direct drive fan motors. Each fan shall be in its own compartment to eliminate cross flow of condenser air during fan cycling and shall be equipped with a heavy-gauge vinyl coated fan guard. Fan motors shall be weather protected, threephase, direct-drive, 1140 rpm, TEAO type. External coils shall have wire mesh protective guards.

D. Refrigerant Circuit: The refrigerant specialties shall be supplied by the unit manufacturer and include a

liquid line shutoff valve, refrigerant filter-drier, sight glass with moisture indicator, liquid line solenoid

70 Catalog ACZ-AGZB1-1

valve, thermal expansion valve, and insulated suction line. The factory specialties, along with piping and insulation furnished by the installing contractor shall be field installed by the contractor.

Control System: A centrally located weatherproof control panel shall contain the field power connection

points, control interlock terminals, and control system. Power and starting components shall include factory fusing of fan motors and control circuit; individual contactors for each fan motor, solid-state three-phase motor overload protection, inherent fan motor overload protection and unit power terminal blocks for connection to remote disconnect switch. Terminals shall also be provided for power supply to the evaporator heater circuit. Hinged access doors shall be lockable. Barrier panels are required to protect against accidental contact with line voltage when accessing the control system. The operating and equipment protection controls shall be:

An advanced DDC microprocessor unit controller with a 4-line by 20-character liquid crystal display

Equipment Protection The unit shall be protected in two ways: (1) by alarms that shut the unit down and require manual reset to restore unit operation and (2) by limit alarms that reduce unit operation in response to some out-oflimit condition. Shut down alarms shall activate an alarm signal.

Shutdown Alarms

Limit Alarms

Unit Enable Selection

Enables unit operation from either local keypad, digital input, or BAS

Unit Mode Selection

Selects standard cooling, ice, glycol, or test operation mode

Analog Inputs

Reset of leaving water temperature, 4-20 mA

Digital Inputs

Unit off switch Motor protection Remote start/stop Flow switch Ice mode switch, converts operation and setpoints for ice production

Catalog ACZ-AGZB1-1

Digital Outputs

 Shutdown alarm; field wired, activates on an alarm condition, off when alarm is cleared  Evaporator pump; field wired, starts pump when unit is set to start

Condenser fan control

The unit controller shall provide control of condenser fans based on compressor discharge pressure.

Building Automation System (BAS) Interface

Factory mounted DDC controller(s) shall support operation on a BACnet®, Modbus® or

ONMARK® network via one of the data link / physical layers listed below as specified by

L the successful Building Automation System (BAS) supplier.

 BACnet MS/TP master (Clause 9)  BACnet IP, (Annex J)  BACnet ISO 8802-3, (Ethernet) 

LONMARK FTT-10A. The unit controller shall be LONMARK® certified.

For chillers communicating over a LONMARK network, the corresponding L eXternal Interface File (XIF) shall be provided with the chiller submittal data.

ONMARK

G. The unit base and coil supports shall be fabricated from heavy gauge steel and painted with powder coat

paint. Incidental supports can be galvanized.

2.05 OPTIONS AND ACCESSORIES

 Hot gas bypass to allow unit operation to 10 percent of full load  Low ambient head pressure control to 0°F (-17.8°C)  Non-fused disconnect switch with through-the-door handle  High interrupt disconnect switch  High short circuit current rating with disconnect swirch  Phase loss/voltage protection  Aluminum fins shall be pre-coated with a phenolic epoxy coating with 1000 hour salt spray rating (ASTM

B117-90

 Copper fin condenser coils  ElectroFin baked epoxy coating providing 5000+ hour salt spray resistance (ASTM B117-90) and is

applied to both the coil and the coil frames.

 Chilled water flow switch to be field mounted in the chilled water line and field wired to terminals in the

control panel.

72 Catalog ACZ-AGZB1-1

PART 3 - EXECUTION

3.01 INSTALLATION

A. Install in strict accordance with manufacturer’s requirements, shop drawings, and contract documents. B. Adjust and level chiller in alignment on supports. C. Coordinate electrical installation with electrical contractor. D Coordinate controls with control contractor. E. Provide all appurtenances required to provide a fully operational and functional chiller.

3.02 START-UP A. Provide proper charge of refrigerant and oil.

Provide testing, and starting of machine, and instruct the Owner in its proper operation and maintenance.

Catalog ACZ-AGZB1-1

74 Catalog ACZ-AGZB1

All McQuay equipment is sold pursuant to McQuay’s Standard Terms and Conditions of Sale and Limited Product Warranty.

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

(800) 432-1342  www.mcquay.com Catalog ACZ-AGZB1 (05/08)

McQuay ACZ 010BS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Features and Benefits

Figure 1, Model ACZ 033, 30-ton Condensing Unit

Design Features

Construction

Compressors

Condenser Coils

Condenser Fans and Motors

Evaporator

Electrical Control Center

Control System

Operator-friendly

Staging

Equipment Protection

Unit Enable Selection

Unit Mode Selection

Digital Inputs

Digital Outputs

Condenser fan control

Building Automation System (BAS) Interface

Keypad/Display

Figure 3, ACZ/AGZ-B Control Panel

Optional Remote Interface Panel

Features

Benefits

Cable and Wiring Recommendations

Figure 5, Remote User Interface Wiring Diagram

ACZ Condensing Unit Performance

Selection Procedure

Selection example, Inch-Pound units

Selection example-SI units

Application Adjustment Factors

Altitude Correction Factors

Table 1, Altitude Correction Factors

ACZ Performance Data

Table 2, R-22, I-P Units, 60 Hz

Table 3, R-407C, I-P Units, 60 Hz

Table 4, R-22, SI Units, 60 Hz,

Table 5, R-407C, SI, 60 Hz

ACZ Part Load Data

Table 6, IP Units, 60Hz

AGZ Chiller Selection Procedure

Selection with Inch-Pound (I-P) units

Selection example

Selection example using ethylene glycol

Selection example, SI Units

Inch-Pound (I-P) Units

The steps for selecting an AGZ-BM are as follows:

Figure 6, Sample Piping Layout

Selection example

Selection example, SI Units

Application Adjustment Factors

Ethylene and Propylene Glycol Factors

Altitude Correction Factors

Evaporator Temperature Drop Factors

Table 7, Ethylene Glycol Factors

Table 8, Propylene Glycol Factors

Fouling Factor

Table 9, Capacity and Power Derates

Table 10, Equivalent Feet for Fittings

Table 11, Maximum Line Size (R-22,R-407C) For Oil Carry Up a Suction Riser

Table 12, Recommended Liquid Line Size, R-22, R-407C

Table 13, Recommended Suction Line Size, R-22, R-407C

Table 14, Refrigerant Piping Derates

AGZ Chiller Performance Data

I-P Units

Table 15, Performance Data, R-22, I-P Units, 60 Hz

Table 16, Performance Data, R-407C, I-P, 60 Hz

SI Units

Table 17, Performance Data, R-22, SI Units, 60 Hz

Table 18, Performance Data, R-407C, SI Units, 60 Hz

AGZ Part Load Data

Table 19, R-22 and R-407C, IP Units, 60Hz

Pressure Drop Curves

Figure 7, AGZ 010B – 034B, Evaporator Pressure Drops

Sound Data