McQuay AGR 070AS User manual

Product Manual

PM AGR-3

Air-Cooled Reciprocating Chiller

AGR 070AS - 100AS, Packaged Chiller

AGR 070AM – 100AM, Remote Evaporator

70 to 100 Tons, 245 to 350 kW

R-22, R-134a

60 Hertz

2

AGR 070A through 100A Product Manual AGR-3

Table of Contents

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

Design Advantages.................................................................................4

Selection Procedure................................................................................9

Application Adjustment Factors...........................................................13

Performance Data .................................................................................16

Part Load Data......................................................................................18

Sound Data ...........................................................................................19

Pressure Drop Curves...........................................................................22

Electrical Data ......................................................................................23

Physical Data........................................................................................29

Dimensional Data.................................................................................33

Application Data...................................................................................38

Optional Features..................................................................................46

Product Specification, AGR-AS ..........................................................48

Product Specification, AGR-AM.........................................................53

Our Facility is

ISO Certified

"McQuay" is a registered trademark of McQuay International



2001 McQuay International

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

make changes in design and construction at anytime without notice"

NOTE

: The Model AGR 070AM through AGR

100AM chillers with remote evaporators are

not included in the ARI Certification Program.

NOTE

: R-134a ratings are not ARI certified.

Document Number: PM AGR-3

Revision: March 2001

Replaces: PM AGR-2

Product Manual AGR-3 AGR 070A through 100A

3

Introduction

McQuay offers air-cooled chillers from 10 through 425 tons (35 - 1500 kW). This

manual covers two varieties of the reciprocating compressor, air-cooled Global

Chiller Line:

AGR 070 AS - AGR 100AS, Packaged Air-Cooled Chillers, R-22 and R-134a

AGR 070AM - AGR 100AM, Air-Cooled with Remote Evaporator, R-22 only

Nomenclature

A G R - XXX A S

AGR-AS Model ARI Standard 550/590-98 Certified

Features and Benefits

Efficiency

•

Cross-circuit compressor staging

•

Copeland Discus



compressors

•

Exceeds ASHRAE Standard 90.1 for

efficiency

Reliability

•

Rugged, proven compressor design

•

Factory installed operating and equipment

protection controls

•

Code and agency approval

Flexibility



Complete factory assembly and testing



Sizes available in convenient 5 ton

increments



Multiple control options

•

Remote evaporator available (R-22 only)

•

Available with HCFC-22 or HFC 134a

Serviceability

•

Dual refrigerant circuits

•

Easy servicing -- All electrical and

refrigerant components are readily accessible

•

Small footprint

Air-Cooled

Global

Reciprocating Compressor

Design Vintage

N

ominal Tons

Application

S= Standard Cooling

M

=

Remote Evaporator

4

AGR 070A through 100A Product Manual AGR-3

Design Advantages

Construction

Factory assembled and mounted on heavy-gauge powder coat painted, galvanized steel channel base.

This base distributes the unit weight for roof loading. Flexible installation is possible by virtue of the

unit’s small footprint and low sound level.

Compressors

The AGR product line uses Copeland DISCUS



valve semi-hermetic compressors. These rugged

compressors are designed for R-22 and the high loading associated with air-cooled applications. They

operate under lighter loading with R-134a.

Semi-hermetic, 1750 rpm induction type motors are used. The motors are refrigerant-gas cooled.

Solid-state modules in the motor terminal box respond to temperature sensors imbedded in all three

motor windings, providing inherent thermal overload protection for all run and start conditions.

The compressor housing is constructed from closed grained, high nickel content, alloy cast-iron with no

bolted joint between the motor and compressor. The housing includes a cast-iron cylinder head and

stator cover, and a crankcase oil sightglass. A suction strainer built into the compressor in the gas

stream between the suction service valve and the motor, filters out foreign and abrasive particles. An

internal relief valve relieves discharge pressure to the suction side for protection at high compression

ratios as required by ANSI/ASHRAE 15 Safety Code.

Main bearings are solid cast bronze insert type with oversized bearing areas that result in ultra-low

bearing loading.

The crankshaft is die-forged, high strength iron alloy with integral counterweights, statically and

dynamically balanced for smooth operation.

Connecting rods are lightweight aluminum with integral bearing surfaces on the crankshaft and piston

ends. Pistons are close grain cast iron with oil and compression rings. Piston pins are full floating type

for long life.

Compressors have a force-feed lubrication system with positive oil displacement, a reversible oil pump,

and an operating oil charge. The pump feeds oil through rifle drilled passages in the crankshaft to all

bearing surfaces. Magnetic plugs trap metal particles that enter the crankcase. The oil supply is filtered

through a large area oil strainer. A crankcase heater minimizes oil dilution by refrigerant at compressor

startup.

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. An integral subcooler circuit provides subcooling to greatly reduce the possibility of liquid line

flashing. The exterior condenser coils are fitted with a vinyl-coated wire mesh protective guard.

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 with permanently lubricated ball bearings and

inherent overload protection. SpeedTrol option includes a single-phase motor with fan speed control on

the lead fan per circuit. Fan motors on the AGR 070-100A are totally-enclosed-air-over (TEAO)

construction providing optimum environmental protection.

Copeland's Compliant Scroll® is a registered trademark of the Copeland Corporation, Sydney, Ohio.

Product Manual AGR-3 AGR 070A through 100A

5

Evaporator

The evaporator is direct expansion, shell-and-tube type with water flowing in the baffled shell side and refrigerant

flowing through the tubes. Two independent refrigerant circuits within the evaporator serve the units dual

refrigerant circuits.

The evaporator has a carbon steel shell and seamless high efficiency copper tubes roller expanded into a carbon

steel tube sheet. Water baffles are polypropylene to resist corrosion.

Refrigerant heads are carbon steel with multi-pass baffles to ensure oil return and are removable to permit access to

the tubes from either end. For water removal, 3/8" (10mm) vent and drain plugs are provided on the top and bottom

of the shell.

The evaporator is wrapped with an electric resistance heater cable and insulated with 3/4" (19mm) thick vinyl nitrate

polymer sheet insulation, protecting against water freeze-up at ambient air temperatures to -20°F (-29°C). An

ambient air thermostat controls the heater cable.

The fitted and glued in place insulation has a K factor of 0.28 at 75°F (23°C).

The refrigerant (tube) side maximum working pressure is 225 psig (1552 kPa). The water side working pressure is

225 psig (1552 kPa). Each evaporator is designed, constructed, inspected, and stamped according to the

requirements of the ASME Boiler and Pressure Vessel Code. Double thickness insulation is an available option.

On Model AGR



AM units the evaporator is shipped separate for field mounting and piping to the outdoor unit.

The refrigerant specialties shown in Figure 1 (dotted lines) must be purchased from McQuay with the unit and

installed by the installing contractor.

NOTE:

The remote evaporator option is available on R-22 application only and is outside ARI certification.

Figure 1, AGR ---AM, Remote Evaporator Piping (One of two circuits shown)

NOTE:

A water flow switch or both water flow switch and water pump starter interlock, must be field installed to

protect against evaporator freeze-up under low water flow conditions.

6

AGR 070A through 100A Product Manual AGR-3

Electrical Control Center

Operating and equipment protection controls and motor starting components are separately housed in a

centrally located, weatherproof control panel with hinged and key locked doors. In addition to one of

the three types of control described in the next sections, the following components are housed in the

panel:

•

Power terminal block

•

Control, input, and output terminal block

•

120V control circuit transformer

•

Optional disconnect switch with through-the-door operating handle

•

Compressor contactors (circuit breakers are available as an option) (part winding on 208/230V,

across-the-line on 380/460/575V) compressor motor inherent thermal and overload protection is

standard.

•

Optional phase voltage monitor with under/over/phase reversal protection

•

Fan contactors with separate fuse blocks

•

The standard FanTrol system controls fan staging for control of refrigerant discharge pressure.

The FanTrol system cycles condenser fans based on discharge pressure and outdoor temperature

and is suited for operation to 40°F (4.4°C).

•

The optional SpeedTrol control uses 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

Global UNT Controller (Standard on R-22)

Microprocessor based control that accomplishes unit capacity control by 6-stage cross-circuit

compressor cycling and unloading based on leaving chilled water temperature. Setpoint and control

band are easily field adjusted. Anti-cycling and stage delay timers are included. Equipment protection

controls include low refrigerant pressure, low evaporator flow (field installed flow switch), low oil

pressure, and sensor failures. Outside air temperature sensor is standard. Reset options are; outside air,

return water, remote reset, demand limit, zone temperature reset. The optional Zone Terminal control is

required to adjust the reset setpoints. The UNT control is used only with R-22.

Thirty feet of sensor cable is included, rolled up in the control panel, on remote evaporator models.

Figure 2, Standard Global UNT Controller

Product Manual AGR-3 AGR 070A through 100A

7

Global UNT with Zone Terminal (optional)

Can be mounted in the chiller control panel or remotely located providing monitoring and adjusting of

certain functions.

•

Monitoring

•

Monitor up to three setting or sensed values

•

Monitor 18 different on/off inputs

•

Monitor alarm status via a flashing alarm light and flashing symbol

•

Adjusting allows adjustment of any flashing set points, three at a time, typically set up so that the

relationship between values can be viewed simultaneously. For example,

•

Display 1 = Lvg Water temp

•

Display 2 = Lvg Water SP

•

Display 3 = % Unit Load

Figure 3, Zone Terminal Configuration

MONITOR

ADJUST

TIME SCHEDULE

PASSWORD

ENTER

Compressor 1

Compressor 2

Stage 3

Stage 4

Solenoid #1

Frzstat#1Alm

Frzstat#2Alm

MinLowPres#1

MinLowPres#2

Occupied

Flow Failure

OA Lockout

Cir#2Lead=On

Pmp/Stp #1=0

Lvg Water Temp

Evap Pres #1

Evap Pres #2

OA/AI3 Input

LvgWtr RBnd SP

Contrl Band SP

Actual Lvg SP

Unoccpd Lvg SP

OA Lockout SP

Lvg Low Lim SP

SoftSta Capcty

Cir #1 Starts

Cir #2 Starts

McQuay AGZ/AGR Global Chiller

INSERT 10

ON OFF

Display

Button 1

Mode

Selector

Panel

Mode

Selector

Button

2

AGZ-AGR

Display Indicator Dot

On/Off Status

3

Operating Mode Indicator

Up/Down Arrow Keys

Door

Display Item List

Warning Signal

ALARM

OA/AI3 HiLimSP

OA/AI3 ResetSP

Display Area 11

Display Area 21

Display Area 31

Alarm Light

Lvg Water SP

% Unit Load

SoftStart Time

Pmp/Stp #2=0

Solenoid #2

Stage 5 Opt.

Stage 6 Opt.

8

AGR 070A through 100A Product Manual AGR-3

MicroTech Control (optional on R-22, standard on R-134a)

Exclusive microprocessor control is common throughout McQuay equipment. The interface is a 12 key

keypad and 2-line, 40 character backlit liquid crystal display. The MicroTech continuously performs

self-diagnostic checks on all system temperatures, pressures, and equipment protection controls, and

will automatically shut down a circuit or the entire unit at fault conditions. The cause, time, and date of

the occurrence is recorded and can be displayed. The seven previous incidents are kept in memory for

service reference.

If a fault occurs, the controller takes preventive measures in an effort to keep the unit operating; staging

down capacity, activating a pre-alarm signal, and automatically switching to the alarm menu on the

display. Pre-alarms are self-clearing when the fault condition is no longer present.

Critical shutdown alarms such as high condenser pressure (with mechanical back up), freeze protection,

oil pressure (with mechanical back up), and low evaporator pressure are manual reset and must be

cleared at the keypad to resume operation.

Choose the MicroTech control and Open Protocol options to interface with virtually any building

management system and perform remote monitoring and control by hard wiring or modem. A nominal

site license fee is required for BAS interface.

A single chiller can connect directly to the BAS. Two or more units will require an Open Protocol

Panel (OPM) for connection.

One hundred feet of sensor cable is included, rolled up in the control panel, on remote evaporator

models.

NOTE:

The MicroTech control is required on R-134a applications.

Figure 4, Optional MicroTech Control Panel

Product Manual AGR-3 AGR 070A through 100A

9

Selection Procedure

Packaged Chiller, Model AS, R-22

Selection with Inch-Pound (I-P) units

Table 9 covers the range of leaving evaporator water temperatures and outside ambient temperatures

included under ARI 550/590. The tables are based on a 10°F temperature drop through the evaporator.

Adjustment factors for applications having other than a 10°F drop can be found in Table 3. The

minimum leaving chilled water temperature setpoint without glycol is 42°F. For glycol selections, see

Table 1 for ethylene or Table 2 for propylene glycol adjustment factors. Ratings are based on a 0.0001

fouling factor in the evaporator at sea level operation. For other fouling factors, different delta-Ts, or

altitude correction factors, see Table 3. For applications outside the catalog ratings contact your local

McQuay sales representative.

Selection example

Given: 67 tons minimum 95

°

F ambient temperature

160 gpm, 55

°

F to 44°F chilled water 0.0001 fouling factor

1.

From Performance Table 9, an AGR 070AS at the given conditions will produce 67.5 tons with a

compressor kW input of 77.1 and a unit EER of 9.6.

2.

If any elements are unknown, use the following equation (water only) to calculate them:

24

=GPM

Tdelta

tons

−

×

3 Determine the evaporator pressure drop. Using Figure 9, enter at 160 and follow up to the AGR

070AS line intersect. Read horizontally to obtain an evaporator pressure drop of 16.0 feet of water.

Selection example using ethylene glycol

Given:

64 tons minimum

95

°

F ambient temperature

54

°

F to 44

°

F chilled fluid

0.0001 fouling factor

Protect from freezing down to 0°F

1.

From Table 1, select an ethylene glycol concentration of 40% to protect against freezing at 0°F.

2.

At 40% ethylene glycol, the adjustment factors are: Capacity =0.961, kW = 0.976,

flow = 1.121, pressure drop = 1.263

3.

Select the AGR 070AS and correct with 40% ethylene glycol factors.

4.

Correct capacity = 0.961 x 67.5 tons = 64.9 tons

5.

Correct compressor kW = 0.976 x 77.1 = 75.2 kW

6.

Calculate chilled water flow:

155.8 =

10

249.64

= capacity) corrected(at flowWater

F

tons

°

×

GPM

Glycol flow (at 40% solution) = 1.121 X 155.8 = 174.7 GPM

Determine the evaporator pressure drop. Using Figure 9, enter at 155.7 (flow rate for water) and follow

up to the AGR 070AS line intersect. Read horizontally to obtain an evaporator pressure drop of 15.5

feet. The pressure drop for 40% glycol solution = 1.263 X 15.5 feet = 19.6 feet of water.

10

AGR 070A through 100A Product Manual AGR-3

Selection Procedure 60 Hertz, SI Units

Table 10, covers a range of leaving evaporator water temperatures and outside ambient temperatures.

The tables are based on a 5°C temperature drop through the evaporator. The minimum leaving chilled

water temperature setpoint without glycol is 5.6°C. For brine selections, see Table 1 for ethylene or

Table 2 for propylene glycol adjustment factors. Ratings are based on a 0.0176 fouling factor in the

evaporator at sea level operation. For other fouling factors, different Delta-Ts, or altitude correction

factors, see Table 3. For applications outside the catalog ratings contact your local McQuay sales

representative.

Selection Example

Given:

235 kW cooling capacity required

35°C ambient air temperature

11 L/s, 12°C - 7°C chilled water temperature

0.0176 evaporator fouling factor

1.

From Table 10, an AGR 070AS at the given conditions will produce 240.0 kW with a compressor

kW input of 77.5 and a COP of 2.84.

2.

Determine the evaporator pressure drop. Using Figure 9, enter at 11 L/s and follow to the AGR

070AS line intersect. Read horizontally to obtain an evaporator pressure drop of 55 kPa of water.

Selection example using ethylene glycol

Given:

225 kW cooling capacity required

35°C ambient air temperature

11 L/s, 12°C - 7°C chilled water temperature

0.0176 evaporator fouling factor

Protect against freezing down to -18°C

1.

From Table 1, select an ethylene glycol concentration of 40% to protect against freezing

at -18°C

2.

At 40% ethylene glycol, the adjustment factors are: Capacity = 0.961, kW = 0.976,

GPM = 1.121, pressure drop = 1.263

3.

Select the AGR 070AS and correct with 40% ethylene glycol factors.

4.

Correct capacity = 0.961 x 240.0 kW = 230.6 kW

5.

Correct compressor kW = 0.976 x 77.5 kW = 75.6 kW

6.

Calculate flow:

Glycol flow (at 40% solution) = 1.121 X 11.0 L/s = 12.3 L/s

7.

Determine the evaporator pressure drop. Using Figure 9, enter at 11.0 L/s (flow rate for water) and

follow to the AGR 070AS line intersect. Read horizontally to obtain an evaporator pressure drop

of 55 kPa of water.

The pressure drop for 40% solution = 1.263 X 55 kPa = 69.5 kPa

Product Manual AGR-3 AGR 070A through 100A

11

Packaged Chiller, Model AS, R-134a

NOTE: R-134a performance is not ARI Certified

AGR performance with R-134a refrigerant is calculated from the R-22 ratings as follows:

1)

Calculate the unit R-134a capacity;

multiply the R-22 capacity by 0.68.

2)

Calculate the unit R-134a power input;

a)

Calculate the unit R-22 power (kW shown in tables is compressor only);

EERUnit

xTonsR

kWUnitR

12022

22

−

=

b)

Calculate the unit fan and control power (unaffected by refrigerant);

TablefromkWCompressorRkWUnitRkWControlFan

2222/

−=

c)

Calculate the R-134a compressor power;

multiply the R-22 compressor kW by 0.615

d)

Calculate the unit R-134a kW;

fan & control power from b)+R-134a compressor power c)

3)

Calculate R-134a EER:

kWUnitaR

MBHcapacityaR

EERaR

134

=

Remote Evaporator, Model AM

Selection with Inch-Pound (I-P) units

Since the AGR-AM units always include a specific remote shell-and-tube evaporator,

the ratings are based on leaving chilled water temperature and ambient air temperature

from the Rating Tables corrected for line loss as follows.

Table 9 (Inch-Pound units) and Table 10 (SI units) cover the normal range of leaving evaporator water

temperatures and outside ambient air temperatures. The tables are based on a 10°F (5

°

C) temperature

drop through the evaporator. Adjustment factors for applications having other than a 10°F (5

°

C) drop

can be found in Table 3. The minimum leaving chilled water temperature setpoint without glycol is

42°F (5.6

°

C). For brine selections, see Table 1 for ethylene Table 2 for propylene glycol adjustment

factors. Ratings are based on a 0.0001 (0.0176) fouling factor in the evaporator at sea level operation.

For other fouling factors, derates for different delta-Ts, or altitude correction factors, see Table 3. For

applications outside the catalog ratings contact your local McQuay sales representative.

The length and configuration of the interconnecting refrigerant piping will affect the system capacity.

Derates based on equivalent length of pipe are given in Table 8. Refer to Application Data, Refrigerant

Piping section for guidelines.

The steps for selecting an AGR-AM are as follows:

1.

Add 3% to the required cooling capacity (to approximate correction factors) and make a

preliminary unit selection from performance Table 9 or Table 10.

2.

Divide the required capacity by the appropriate capacity correction factors: glycols from Table 1 or

Table 2; altitude, chilled water Delta T, or fouling factor Table 3; and refrigerant piping derate from

Table 8 as explained in step 3 below.

3.

Determine the suction line size by summing the equivalent feet (from Table 4) of all the fittings

(use a sketch of the piping layout) and

adding the sum of these fitting losses

to the actual linear feet

of tubing. This will then equal the

total equivalent feet

. (To use the equivalent feet, start with the

unit suction connection size from Table 6 as the first try). Knowing the equivalent feet and the unit

size, check the line selection in Table 6 or Table 7 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.

12

AGR 070A through 100A Product Manual AGR-3

Selection example

Given:

64 tons required capacity

95°F ambient temperature

Cool 154 gpm from 54

°

F to 44°F

0.0001 evaporator fouling factor

2,000 foot altitude

Add 3% to the required capacity for approximate derate: 64 x 1.03 = 66 tons. From Performance Table

9, an AGR-070AM at the given conditions will produce 67.5 tons with a compressor kW input of 77.1

and a unit EER of 9.6.

1.

Determine derate factors :

Altitude correction from Table 3: 0.986 Capacity, 1.009 Power

2.

Piping correction:

Assume 2 1/8" suction line based on connection size in Table 6

(3) 90

°

Standard ells (Table 4) 3 x 5 ft =15 ft

Plus actual linear feet 70 ft

Total Equivalent Feet 85 ft

Check Table 7 for size and find that 2 1/8” is acceptable size for oil carry. If the selected riser size

is too large, double risers would be required. See Refrigerant Piping section for important

information, including double riser layouts.

The capacity correction factor from Table 8 is 0.984.

3.

The corrected capacity of the AGR is: 67.5 tons x 0.986{altitude} x 0.984{piping} = 65.5 tons

This satisfies the 64 ton requirement.

4.

Correct the compressor power required: 77.1 kW x 1.009{altitude} = 77.8 kW.

5.

Calculate the unit power input from corrected EER:

W = BTU / EER W =65.5 tons x 12,000 / (9.6 EER / 1.009) = 81.1 kW

6.

Determine the evaporator pressure drop. Enter the pressure drop curves (Figure 9) at 154 gpm and

read up to AGR 070AM, read over to pressure drop of 15 ft.

Selection example using ethylene glycol

Given: 64 tons required capacity

95

°

F ambient temperature

54

°

F to 44

°

F chilled fluid

0.0001 fouling factor

Protect from freezing down to 0°F

1.

From Table 1, select an ethylene glycol concentration of 40% to protect against freezing at 0°F.

2.

At 40% ethylene glycol, the adjustment factors are: Capacity =0.961, kW = 0.976,

Flow = 1.121, pressure drop = 1.263

3.

Select the AGR 070AM and correct with 40% ethylene glycol factors and piping correction factor.

4.

Correct capacity = 0.961 X 67.5 tons = 64.6 tons

5.

Correct compressor kW = 0.976 X 77.1 = 75.2 kW

Figure 5, Sample Piping Layout

A

GR-AM

Remote Eva

p

orator

10 ft.

30 ft.

20 ft.

10 ft.

Li

q

uid

Line

Suction

Line

Product Manual AGR-3 AGR 070A through 100A

13

6.

Calculate chilled water flow:

Water flow (at corrected capacity) = = 155.3 GPM

64.7 24

10

tons

F

×

°

Glycol flow (at 40% solution) = 1.121 X 155.3 GPM = 174.1 GPM

Determine the evaporator pressure drop. Using Figure 9, enter at 155.3 GPM and follow up to the

AGR 070AM line intersect. Read horizontally to obtain an evaporator pressure drop of 15 feet. The

pressure drop for 40% solution = 1.263 X 15 feet = 19 feet.

Selection Procedure 60 Hz Metric Units

The selection procedure for Metric units is exactly the same as English except that Metric tables and

metric units are used.

Application Adjustment Factors

Ethylene and Propylene Glycol Factors

AGR units can operate with a leaving chilled fluid temperature range of 20°F (-6.7°C) to 60°F

(15.6°C). A glycol solution is required when leaving chilled fluid temperature is below 42°F (5.6°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 and reduce the unit's performance. For

performance at elevations other than sea level refer to Table 3. Maximum allowable altitude is 6,000

feet (1830 meters).

Evaporator Temperature Drop Factors

Performance tables are based on a 10°F (5.5°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 to 16 degrees F (3.3 to 8.9 degrees C) range may 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). Maximum entering temperature during operation is 90

°

F (32.2

°

C).

Table 1, Ethylene Glycol

Freeze Point

%

E.G.

°F °C

Capacity Power Flow PD

10 23.0 -5 0.991 0.996 1.013 1.070

20 14.0 -10 0.982 0.992 1.040 1.129

30 1.4 -17 0.972 0.986 1.074 1.181

40 -13.0 -25 0.961 0.976 1.121 1.263

50 -34.6 -37 0.946 0.966 1.178 1.308

Table 2, Propylene glycol

Freeze Point

%

P.G.

°F °C

Capacity Power Flow PD

10 26 -3 0.987 0.992 1.010 1.068

20 19 -7 0.975 0.985 1.028 1.147

30 9 -13 0.962 0.978 1.050 1.248

40 -5 -21 0.946 0.971 1.078 1.366

50 -27 -33 0.929 0.965 1.116 1.481

NOTE: Ethylene and propylene glycol ratings are outside the scope of

Standard 550/590-98 certification program

14

AGR 070A through 100A Product Manual AGR-3

Fouling factor

Performance tables are based on water with a fouling factor of

kWCmorBTUFxhrxft

/0176.0,,/0001.0

22

°×°

per ARI 550/590-98. As fouling increases,

performance decreases. For performance at other than 0.0001 (0.0176) fouling factor see Table 3.

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. To ensure optimum unit

operation, maintain proper water treatment.

Table 3, Capacity and Power Derates

Fouling Factor

Chilled Water

Delta-T

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

ALTITUDE

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

6 3.3 0.992 0.995 0.985 0.993 0.962 0.986 0.919 0.972

8 4.4 0.995 0.997 0.988 0.995 0.965 0.988 0.922 0.974

SEA 10 5.6 1.000 1.000 0.993 0.998 0.970 0.991 0.927 0.977

LEVEL 12 6.7 1.005 1.002 0.998 1.000 0.975 0.993 0.932 0.979

14 6.8 1.010 1.005 1.003 1.003 0.980 0.996 0.936 0.982

16 8.9 1.014 1.007 1.007 1.005 0.984 0.998 0.940 0.984

6 3.3 0.978 1.005 0.971 1.003 0.949 0.996 0.906 0.982

8 4.4 0.982 1.007 0.975 1.005 0.953 0.998 0.910 0.984

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

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

14 6.8 0.997 1.014 0.990 1.012 0.967 1.005 0.924 0.991

16 8.9 1.000 1.016 0.993 1.014 0.970 1.007 0.927 0.993

6 3.3 0.966 1.016 0.959 1.014 0.937 1.007 0.895 0.993

8 4.4 0.969 1.018 0.962 1.016 0.940 1.009 0.898 0.995

4000 feet 10 5.6 0.973 1.021 0.966 1.019 0.944 1.012 0.902 0.998

(1220 m) 12 6.7 0.978 1.025 0.971 1.023 0.949 1.016 0.906 1.002

14 6.8 0.982 1.027 0.975 1.025 0.953 1.018 0.910 1.004

16 8.9 0.986 1.028 0.979 1.026 0.956 1.019 0.914 1.005

6 3.3 0.953 1.025 0.946 1.023 0.924 1.016 0.883 1.002

8 4.4 0.955 1.028 0.948 1.026 0.926 1.019 0.885 1.005

6000 feet 10 5.6 0.959 1.031 0.952 1.029 0.930 1.022 0.889 1.008

(1830 m) 12 6.7 0.963 1.034 0.956 1.032 0.934 1.024 0.893 1.011

14 6.8 0.968 1.036 0.961 1.034 0.939 1.026 0.897 1.013

16 8.9 0.972 1.037 0.965 1.035 0.943 1.027 0.901 1.014

Table 4, Equivalent Feet for Fittings

Line Size inch, OD Copper

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

2.0 2.6 3.3 4.0 5.0 6.0 7.5

90

°

Long Radius

1.4 1.7 2.3 2.6 3.3 4.1 5.0

90

°

Street

3.2 4.1 5.6 6.3 8.2 10 12

45

°

Standard

0.9 1.3 1.7 2.1 2.6 3.2 4.0

45

°

Street

1.5 2.1 3.0 3.4 4.5 5.2 6.4

180

°

Bend

3.2 4.1 5.6 6.3 8.2 10 12

Tees

Full Size 1.4 1.7 2.3 2.6 3.3 4.1 5.0

Reducing 2.0 2.6 3.3 4.0 5.0 6.0 7.5

Valves

Globe Valve, Open 22 29 38 43 55 69 84

Gate Valve, Open 0.9 1.0 1.5 1.8 2.3 2.8 3.2

Angle Valve, Open 9.0 12 15 18 24 29 35

Product Manual AGR-3 AGR 070A through 100A

15

Table 5, Recommended Liquid Line Sizes Per Refrigerant Circuit

Recommended Liquid Line Size Per Circuit

AGR-AM

Unit Model

Liquid

Connection

Size at Unit

Up To 50

Equiv. Feet

Up To 75

Equiv. Feet

Up To 100

Equiv. Feet

Up To 125

Equiv. Feet

Up To 150

Equiv. Feet

070AM

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

075AM

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

080AM

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

1 3/8"

085AM

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

1 3/8"

090AM

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

1 3/8"

095AM

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

1 3/8"

100AM

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

1 3/8"

Table 6. Recommended Horizontal and Downflow Suction Line Size

Recommended Suction Line Size

AGR-AM

Unit Model

Suction

Connection

Size at Unit

Up To 50

Equiv. Feet

Up To 75

Equiv. Feet

Up To 100

Equiv. Feet

Up To 125

Equiv. Feet

Up To 150

Equiv. Feet

070AM 2 1/8" 2 1/8"

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

075AM 2 1/8" 2 1/8"

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

080AM 2 1/8", 2 5/8" 2 1/8", 2 5/8"

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

085AM 2 5/8"

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

3 1/8"

090AM 2 5/8"

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

3 1/8" 3 1/8"

095AM 2 5/8"

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

3 1/8" 3 1/8"

100AM 2 5/8"

2 5/8" 2 5/8"

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

Table 7, Minimum Suction Riser Size

Minimum Suction Riser for Oil Carry by Unit System

AGR

Model

070AM 075AM 080AM 085AM

System1 212121 2

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

AGR

Model

090AM 095AM 100AM

System 1 2 1 2 1 2

Line Size 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

Table 8, Refrigerant Piping Derates

Capacity Loss Due to Refrigerant Piping

AGR-AM

Unit Model

At Unit 50 Equiv. ft. 75 Equiv. ft. 100 Equiv. ft. 125 Equiv. ft. 150 Equiv. ft.

070AM 1.0 0.969

0.984 0.978 0.973 0.967

075AM 1.0 0.969

0.984 0.978 0.973 0.967

080AM 1.0 0.961

0.978 0.971 0.963 0.957

085AM 1.0

0.982 0.974 0.966 0.957

0.978

090AM 1.0

0.979 0.968 0.957

0.978 0.974

095AM 1.0

0.979 0.968 0.957

0.978 0.974

100AM 1.0

0.976 0.964

0.980 0.975 0.971

16

AGR 070A through 100A Product Manual AGR-3

Performance Data

Table 9, AGR 070 – AGR 100, 60 Hz, R-22, I-P Units

See Selection Procedure section for derates for the "AM" remote evaporator units

AMBIENT AIR TEMPERATURE

75°F 85°F 95°F 105°F 115°F

AGR

SIZE

LWT

(°F)

Capac.

Tons

PWR

kWi

EER

Capac.

Tons

PWR

kWi

EER

Capac.

Tons

PWR

kWi

EER

Capac.

Tons

PWR

kWi

EER

Capac.

Tons

PWR

kWi

EER

4

0

.

0

71.1

6

4.

8

12.1

6

7.1

69

.4 1

0

.7

63

.1 74.1

9

.

3

59

.

3

80

.2

8

.

3

55

.

5

86

.1 7.2

42.0 73.5 65.5 12.4 69.4 70.5 10.9 65.3 75.4 9.5 61.4 81.5 8.5 57.5 87.5 7.4

070AS

44.

0

7

5

.

9

66

.2 12.

6

71.7 71.

5

11.1

6

7.

5

77.1

9

.

6

63

.

5

83

.

0

8

.

6

59

.

5

88

.

9

7.

5

070AM

4

6

.

0

7

8

.

6

7.

5

12.

8

6

7.

8

72.4 11.4 7

0

.

0

7

8

.4

9

.

9

65

.

8

4.

3

8

.

8

6

1.

6

90

.4 7.

6

48.0 81.3 68.6 13.1 76.9 73.5 11.6 72.5 79.7 10.1 68.1 85.7 9.0 63.7 92.1 7.8

50.0 84.0 69.6 13.3 79.4 75.0 11.8 74.9 80.7 10.2 70.4 87.2 9.1 65.8 93.7 7.9

4

0

.

0

7

3

.

0

65

.4 11.

9

69

.

3

71.

9

1

0

.

6

65

.

5

74.

9

.

3

6

1.

6

80

.

3

8

.

3

5

7.7

85

.

6

7.2

42.0 75.5 66.8 12.1 71.7 73.1 10.8 67.8 76.0 9.5 63.7 81.7 8.4 59.5 87.3 7.4

075AS

44.

0

7

8

.

0

6

7.

6

12.4 74.1 74.2 11.

0

7

0

.1 77.

3

9

.

6

65

.

9

83

.1

8

.

6

1.

8

88

.

9

7.

5

075AM

4

6

.

0

80

.7

68

.7 12.7 7

6

.

6

7

6

.1 11.2 72.

5

7

9

.4

9

.

8

68

.

3

8

4.

5

8

.

8

6

4.

0

90

.

6

7.7

48.0 83.3 69.6 13.0 79.1 78.0 11.4 74.9 81.8 10.0 70.6 85.9 8.9 66.3 92.2 8.2

50.0 85.9 70.7 13.2 81.6 79.1 11.7 77.3 84.0 10.2 72.9 87.4 9.1 68.6 93.9 8.0

4

0

.

0

8

1.2 72.

8

11.

9

77.

0

80

.1 1

0

.

6

72.

8

83

.

3

9

.

3

68

.

5

89

.4

8

.

3

6

4.1

95

.

3

7.2

42.0 83.9 74.5 12.2 79.7 81.4 10.8 75.4 84.7 9.5 70.7 91.0 8.4 66.1 97.2 7.3

080AS

44.

0

86

.7 7

5

.

3

12.4

8

2.

3

8

2.7 11.

0

77.

9

86

.1

9

.

6

7

3

.

3

9

2.

6

8

.

5

68

.

6

99

.

0

7.

5

080AM

4

6

.

0

89

.7 7

6

.

5

12.7

85

.1

8

4.

8

11.2

80

.

5

88

.

3

9

.

8

7

5

.

9

4.1

8

.7 71.2 1

00

.

8

7.7

48.0 92.5 77.4 12.9 87.9 86.9 11.5 83.2 91.1 10.0 78.5 95.7 8.9 73.7 102.7 8.2

50.0 95.5 78.7 13.2 90.7 88.0 11.7 85.8 93.5 10.2 81.1 97.3 9.1 76.3 104.5 8.0

4

0

.

0

88

.

3

7

9

.

3

12.

0

83

.7

8

7.

3

1

0

.7 7

9

.2

90

.

9

.4 74.

5

9

7.

5

8

.

3

69

.7 1

03

.

9

7.

3

42.0 91.3 81.2 12.3 86.6 88.7 10.9 81.9 92.4 9.5 76.9 99.3 8.5 71.9 106.0 7.4

085AS

44.

0

9

4.

3

8

2.2 12.

5

89

.

5

90

.1 11.1

8

4.7

93

.

9

.7 7

9

.7 1

00

.

9

8

.

6

74.

6

1

08

.

0

7.

6

085AM

4

6

.

0

9

7.

5

83

.4 12.

8

9

2.

5

9

2.

5

11.4

8

7.

6

96

.

3

9

.

9

8

2.

5

1

0

2.

6

8

.

8

77.4 11

0

.

0

7.7

48.0 100.6 84.5 13.1 95.5 94.7 11.6 90.5 99.3 10.1 85.3 104.3 9.0 80.2 112.0 8.3

50.0 103.8 85.8 13.3 98.6 96.0 11.8 93.3 102.0 10.3 88.1 106.1 9.2 82.9 114.0 8.1

4

0

.

0

90

.

3

80

.2 12.2

85

.7

88

.

3

1

0

.

8

1.1

9

1.

9

.

5

7

6

.2

98

.

5

8

.4 71.4 1

05

.1 7.4

42.0 93.4 82.1 12.4 88.7 89.7 11.0 83.9 93.4 9.6 78.7 100.3 8.6 73.6 107.1 7.5

090AS

44.

0

96

.

5

83

.

0

12.7

9

1.

6

9

1.1 11.2

86

.7

9

4.

9

.

8

1.

5

1

0

2.

0

8

.7 7

6

.4 1

09

.1 7.7

090AM

4

6

.

0

99

.

8

4.

3

12.

9

4.7

93

.

5

11.

5

89

.

6

9

7.4 1

0

.

0

8

4.4 1

03

.7

8

.

9

7

9

.2 111.1 7.

8

48.0 103.0 85.4 13.2 97.8 95.8 11.7 92.6 100.4 10.2 87.3 105.4 9.1 82.0 113.2 8.4

50.0 106.3 86.7 13.5 100.9 97.0 11.9 95.5 103.1 10.4 90.2 107.2 9.3 84.9 115.2 8.2

4

0

.

0

9

7.

9

89

.

6

11.

9

2.

9

98

.

6

1

0

.

6

8

7.

9

1

0

2.

6

9

.

3

8

2.

6

11

0

.1

8

.

3

77.4 117.4 7.2

42.0 101.3 91.7 12.1 96.1 100.3 10.8 90.9 104.4 9.5 85.4 112.2 8.4 79.8 119.7 7.4

095AS

44.

0

1

0

4.

6

9

2.

8

12.4

99

.

3

1

0

1.

8

11.

0

9

4.

0

1

06

.1

9

.

6

88

.4 114.

0

8

.

6

8

2.

8

122.

0

7.

5

095AM

4

6

.

0

1

08

.2

9

4.2 12.

6

1

0

2.7 1

0

4.

5

11.2

9

7.2 1

08

.

8

9

.

8

9

1.

5

11

5

.

9

8

.7

85

.

9

124.

3

7.7

48.0 111.7 95.4 12.9 106.0 107.0 11.4 100.4 112.3 10.0 94.7 117.9 8.9 89.0 126.5 8.2

50.0 115.2 96.9 13.2 109.4 108.4 11.7 103.6 115.2 10.2 97.8 119.8 9.1 92.0 128.8 8.0

4

0

.

0

1

0

7.1

99

.4 11.

9

1

0

1.7 1

09

.

5

1

0

.

6

96

.1 11

3

.

9

.

3

90

.4 122.2

8

.2

8

4.

6

1

30

.

3

7.2

42.0 110.8 101.8 12.2 105.2 111.2 10.7 99.5 115.8 9.5 93.3 124.4 8.4 87.3 132.9 7.3

100AS

44.

0

114.4 1

03

.

0

12.4 1

08

.7 11

3

.

0

11.

0

1

0

2.

8

117.7

9

.

6

96

.7 12

6

.

5

8

.

6

90

.

6

1

35

.4 7.

5

100AM

4

6

.

0

11

8

.

3

1

0

4.

5

12.7 112.4 11

5

.

9

11.2 1

06

.

3

12

0

.

8

9

.

8

1

00

.1 12

8

.7

8

.

8

9

4.

0

1

3

7.

8

7.

6

48.0 122.1 105.9 12.9 116.0 118.8 11.4 109.8 124.5 10.0 103.5 130.8 8.9 97.2 140.4 8.2

50.0 126.0 107.6 13.2 119.7 120.4 11.7 113.3 127.8 10.2 107.0 133.0 9.1 100.6 142.9 7.9

Notes:

1. Boxed ratings certified in accordance with ARI Standard 550/590-98 for "AS" units only. Remote evaporator units (AM) are outside the ARI scope.

2. Ratings based on HCFC-22, evaporator fouling factor of 0.0001, 2.4 gpm/ton, and at sea level.

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

4. For 208V units, multiply capacity and EER by 0.98

5. For units with SpeedTrol option, multiply capacity and EER by 0.98

6. Operation below 42

°

F requires glycol and performance adjustment.

7. Ratings can be interpolated but not extrapolated.

Product Manual AGR-3 AGR 070A through 100A

17

Table 10, AGR 070 – AGR 100, 60 Hz, R-22, SI Units

See Selection Procedure section for derates for the "AM" remote evaporator units

AMBIENT AIR TEMPERATURE

25°C (77°F) 30°C (86°F) 35°C (95°F) 40°C (104°F) 45°C (113°F)AGR

SIZE

LWT

(°C)

Capac.

kW

PWR

kWi

COP

Capac.

kW

PWR

kWi

COP

Capac.

kW

PWR

kWi

COP

Capac.

kW

PWR

kWi

COP

Capac.

kW

PWR

kWi

COP

5.0 (41.0°F) 251.4 66.1 3.50 238.6 70.4 3.13 225.8 74.7 2.75 213.6 80.3 2.48 201.4 85.6 2.21

6.0 (42.8°F) 258.9 66.8 3.57 245.8 71.4 3.19 232.7 76.1 2.79 220.3 81.5 2.52 207.8 86.9 2.25

070AS 7.0 (44.6°F) 265.4 67.6 3.62 247.2 72.4 3.24 240.0 77.5 2.84 227.2 82.8 2.56 214.3 88.1 2.28

070AM 8.0 (46.4°F) 271.6 68.7 3.68 245.1 73.2 3.30 247.9 78.7 2.92 234.5 84.0 2.62 221.1 89.5 2.32

9.0 (48.2°F) 283.8 69.7 3.76 269.8 74.2 3.35 255.8 79.8 2.97 241.9 85.2 2.67 227.9 90.9 2.37

10.0 (50.0°F) 292.2 70.7 3.81 277.7 75.6 3.40 263.4 80.7 2.99 249.2 86.6 2.69 234.6 92.4 2.40

5.0 (41.0°F) 258.5 67.4 3.45 246.6 72.8 3.10 234.4 75.5 2.75 221.7 80.4 2.47 208.9 85.3 2.20

6.0 (42.8°F) 266.3 68.4 3.51 254.1 73.8 3.16 241.7 76.6 2.79 228.6 81.7 2.51 215.4 86.8 2.23

075AS 7.0 (44.6°F) 274.4 69.3 3.57 261.8 75.1 3.21 249.1 77.9 2.83 235.8 83.0 2.56 222.6 88.2 2.27

075AM 8.0 (46.4°F) 282.7 70.4 3.64 269.7 76.9 3.26 256.7 79.9 2.88 243.3 84.3 2.61 229.7 89.7 2.34

9.0 (48.2°F) 290.9 71.4 3.72 277.6 78.5 3.32 264.3 82.0 2.94 250.6 85.7 2.64 237.0 91.1 2.43

10.0 (50.0°F) 299.1 72.3 3.78 285.5 79.6 3.40 271.8 84.0 2.99 257.9 87.1 2.70 244.3 92.6 2.40

5.0 (41.0°F) 287.4 75.1 3.45 274.0 81.1 3.10 260.6 84.0 2.75 246.4 89.6 2.48 232.1 95.0 2.19

6.0 (42.8°F) 296.0 76.2 3.52 282.4 82.3 3.15 268.7 85.3 2.80 253.9 91.0 2.51 239.2 96.7 2.22

080AS 7.0 (44.6°F) 304.9 77.2 3.58 290.8 83.7 3.20 276.7 86.8 2.83 262.1 92.4 2.54 247.3 98.2 2.27

080AM 8.0 (46.4°F) 314.2 78.4 3.65 299.6 85.6 3.26 285.0 88.9 2.88 270.4 93.9 2.59 255.5 99.8 2.34

9.0 (48.2°F) 323.1 79.4 3.71 308.5 87.4 3.33 293.5 91.3 2.94 278.6 95.4 2.65 263.5 101.5 2.44

10.0 (50.0°F) 332.5 80.6 3.78 317.3 88.6 3.38 301.7 93.5 2.99 286.9 96.9 2.70 271.7 103.1 2.41

5.0 (41.0°F) 312.5 81.8 3.48 297.8 88.4 3.13 283.3 91.7 2.77 267.9 97.7 2.49 252.4 103.6 2.22

6.0 (42.8°F) 322.0 83.1 3.55 307.0 89.6 3.18 292.0 93.0 2.81 276.1 99.2 2.53 260.2 105.4 2.25

085AS 7.0 (44.6°F) 331.6 84.2 3.61 316.2 91.2 3.24 300.9 94.6 2.86 285.0 100.7 2.57 268.9 107.2 2.30

085AM 8.0 (46.4°F) 341.5 85.5 3.69 325.7 93.3 3.31 310.1 96.9 2.91 293.9 102.3 2.62 277.8 108.9 2.35

9.0 (48.2°F) 351.3 86.7 3.76 335.2 95.3 3.36 319.3 99.6 2.97 302.8 104.0 2.68 286.6 110.7 2.47

10.0 (50.0°F) 361.4 87.8 3.81 344.9 96.6 3.41 328.1 102.0 3.02 311.7 105.7 2.73 295.2 112.4 2.44

5.0 (41.0°F) 319.7 82.7 3.52 305.0 89.4 3.15 290.1 92.7 2.80 274.2 98.7 2.52 258.4 104.8 2.24

6.0 (42.8°F) 329.5 84.0 3.58 314.3 90.6 3.21 299.0 94.0 2.84 282.5 100.3 2.56 266.4 106.5 2.28

090AS 7.0 (44.6°F) 339.4 85.1 3.65 323.7 92.2 3.27 308.0 95.7 2.89 291.5 101.8 2.60 275.2 108.3 2.33

090AM 8.0 (46.4°F) 349.6 86.4 3.71 333.4 94.4 3.34 317.2 98.0 2.94 300.7 103.4 2.65 284.2 110.0 2.38

9.0 (48.2°F) 359.7 87.6 3.79 343.2 96.4 3.39 326.7 100.7 3.00 309.9 105.1 2.71 293.1 111.8 2.50

10.0 (50.0°F) 370.0 88.8 3.86 352.9 97.6 3.44 335.9 103.1 3.05 319.1 106.8 2.76 302.3 113.6 2.47

5.0 (41.0°F) 346.7 92.4 3.45 330.5 99.8 3.10 314.4 103.5 2.75 297.3 110.4 2.47 280.2 117.1 2.19

6.0 (42.8°F) 357.2 93.9 3.51 340.6 101.3 3.15 324.0 105.1 2.79 306.5 112.1 2.51 288.8 119.1 2.23

095AS 7.0 (44.6°F) 367.9 95.1 3.58 350.9 103.1 3.20 334.0 106.9 2.83 316.1 113.8 2.56 298.4 121.1 2.27

095AM 8.0 (46.4°F) 379.1 96.5 3.63 361.6 105.5 3.26 344.1 109.5 2.88 326.0 115.6 2.59 308.2 123.0 2.33

9.0 (48.2°F) 390.0 97.9 3.71 372.0 107.7 3.31 354.2 112.6 2.94 336.1 117.5 2.64 318.1 125.0 2.44

10.0 (50.0°F) 401.1 99.2 3.79 382.7 109.1 3.39 364.3 115.2 2.99 346.0 119.4 2.70 327.6 127.0 2.40

5.0 (41.0°F) 379.3 102.5 3.44 361.7 110.8 3.09 344.0 114.8 2.75 325.1 122.4 2.46 306.4 129.9 2.19

6.0 (42.8°F) 390.8 104.2 3.51 372.7 112.4 3.14 354.6 116.6 2.79 335.2 124.3 2.50 315.9 132.1 2.23

100AS 7.0 (44.6°F) 402.4 105.5 3.57 384.0 114.3 3.21 365.2 118.6 2.83 345.9 126.3 2.56 326.4 134.3 2.28

100AM 8.0 (46.4°F) 414.6 107.1 3.64 395.5 117.0 3.26 376.3 121.5 2.88 356.7 128.3 2.61 337.1 136.4 2.33

9.0 (48.2°F) 426.5 108.6 3.70 406.9 119.5 3.32 387.3 124.8 2.94 367.5 130.4 2.64 347.6 138.7 2.45

10.0 (50.0°F) 438.7 110.1 3.78 418.6 121.1 3.37 398.4 127.8 2.99 378.6 132.4 2.69 358.4 140.9 2.39

NOTES:

1. Ratings based on HCFC-22, evaporator fouling of 0.00176, 0.048 l/s per kW, and sea level altitude. Remote evaporator units (AM) are outside ARI scope.

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

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

4. For LWT below 4.4°C and below please refer to Application Data.

5. For 208V units, multiply capacity and EER by 0.98

6. For units with SpeedTrol option, multiply capacity and EER by 0.98

7. Operation below 5.6

°

C requires glycol and performance adjustment.

18

AGR 070A through 100A Product Manual AGR-3

Part Load Data

Table 11, 60 Hz, R-22

Unit Size % Load

Capacity

Tons

Power

Unit kW

EER IPLV

100.00

67.5 84.4 9.6

75.00

50.5 48.9 12.4

50.00

33.7 26.7 15.2

070AS

25.00

16.8 11.8 17.0

14.2

100.00

70.1 87.6 9.6

75.00

52.6 53.8 11.7

50.00

35 34.0 12.4

075AS

25.00

17.5 14.6 14.4

12.3

100.00

77.9 97.2 9.6

75.00

58.4 59.1 11.9

50.00

38.9 34 13.7

080AS

25.00

19.4 16.1 14.5

13.0

100.00

84.7 104.9 9.7

75.00

63.5 63.5 12

50.00

42.3 35.2 14.4

085AS

25.00

21.1 15.4 16.4

13.6

100.00

86.7 106 9.8

75.00

65 64.1 12.2

50.00

43.3 35.5 14.6

090AS

25.00

21.6 15.6 16.6

13.8

100.00

94 117.6 9.6

75.00

70.4 71.5 11.8

50.00

46.9 39.2 14.3

095AS

25.00

23.4 16.5 17.0

13.5

100.00

102.8 128.5 9.6

75.00

77.1 79.3 11.7

50.00

51.4 43.9 14.0

100AS

25.00

25.7 19.3 16.0

13.2

Notes: Certified in accordance with ARI Standard 550/590-98.

Product Manual AGR-3 AGR 070A through 100A

19

Sound Data

Table 12, AGR 070AS/AM - 100AS/AM Sound Pressure

Sound Pressure At 30 ft. From Sides Of Unit (dB)

Octave Band

Unit

Model

63 125 250 500 1000 2000 4000 8000

Sound Pressure

Overall

A-Weighted

AGR070A

65 65 64 64 62 56 54 54 66

AGR075A

66 67 65 65 62 56 55 55 67

AGR080A

66 68 65 65 62 56 56 55 67

AGR085A

67 69 66 65 62 56 56 55 67

AGR090A

67 69 66 65 62 56 56 55 67

AGR095A

68 69 67 66 63 58 58 56 68

AGR100A

69 70 68 66 63 58 58 56 68

Note: Data at 30 ft. (9m) from side of unit.

Table 13, AGR 070AS/AM – 100AS/AM Sound Power

Sound Power

Octave Band

Unit

Model

63 125 250 500 1000 2000 4000 8000

Sound Power

Overall

A-Weighted

AGR070A

92 92 91 91 89 83 81 81 93

AGR075A

93 94 92 92 89 83 82 82 94

AGR080A

93 95 92 92 89 83 83 82 94

AGR085A

94 96 93 92 89 83 83 82 94

AGR090A

94 96 93 92 89 83 83 82 94

AGR095A

95 96 94 93 90 85 86 83 95

AGR100A

96 97 95 93 90 85 86 83 95

Note: Per ARI Standard 370

Sound levels are as important as unit cost and efficiency, and must be addressed before to the start of

any development program. Efforts by McQuay design engineers to design chillers that are sensitive to

the sound requirements of the market 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 may 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 54/44°F

(12/7°C) evaporator water temperatures for air-cooled units.

20

AGR 070A through 100A Product Manual AGR-3

Sound Power Levels

Acoustical consultants may require sound power octave band data to perform a detailed acoustical

analysis. The tables that follow 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 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 Table 14. Another way of 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.

Figure 6, "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 14 for various distances and the two most usual

cases of “Q” type of location.

Table 14, dB Conversion of Sound Power to Pressure for Distance

DB Reduction from Sound Power at the Source to Sound

Pressure at Referenced Distance

Distance from Sound Source

ft. (m)

Q=2 Q=4

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

Page is loading ...

McQuay AGR 070AS User manual

Related papers

Other documents