McQuay AWS175ADS Installation Manual

Installation Manual IM 997-4

Pathfinder™ Air Cooled Chillers

Model AWS • Standard, High, and Premium Efficiency 150 to 530 tons • 550 to 1860 kW • R-134a • 60 Hz

Group: Chillers

Part Number:

Date: January 6, 2011

10000199901

• Includes models withVFD

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

Modbus

Installation and Startup . . . . . . . . . . . . . . . . . . . . . . 4

Clearance Requirements . . . . . . . . . . . . . . . . . 5

Physical Data (non-VFD) . . . . . . . . . . . . . . . . . . . . 15

Physical Data (VFD) . . . . . . . . . . . . . . . . . . . . . . . . 30

Lifting & Mounting Weights (I-P Units). . . . . . . . . 39

Lifting & Mounting Weights (SI Units) . . . . . . . . . 41

Lifting & Mounting Locations - 60 Hz Standard. . 43

Lifting & Mounting Locations - 60 Hz High . . . . . 48

Lifting & Mounting Locations - 60 Hz Premium. . 53

Lifting & Mounting Locations (VFD) . . . . . . . . . . . 56

Isolator Locations and Kit Numbers. . . . . . . . . . . 67

Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Multipoint Electrical Data (non-VFD) . . . . . . . . . . 80

Multipoint Field Wiring Data (non-VFD) . . . . . . . 91

Terminal Amps (non-VFD) (single/multi-point). 101

Single-point Electrical Data (non-VFD) . . . . . . . 105

Single-point Field Wiring Data (non-VFD). . . . . 110

Multipoint Electrical Data (VFD). . . . . . . . . . . . . 114

Multipoint Field Wiring Data (VFD) . . . . . . . . . . 117

Terminal Amps (VFD) (single- and multi-point) 120

Single-point Electrical Data (VFD) . . . . . . . . . . . 121

Single-point Field Wiring Data (VFD). . . . . . . . . 122

Pressure Drop Data. . . . . . . . . . . . . . . . . . . . . . . 123

Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . 130

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . 132

Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Hazard Identification

DANGER

Dangers indicate a hazardous situation which will result in death or serious injury if not avoided.

WARNING

Warnings indicate potentially hazardous situations, which can result in property damage, severe personal injury, or death if not avoided.

CAUTION

Cautions indicate potentially hazardous situations, which can result in personal injury or equipment damage if not avoided.

Document: IM 997-4 Issue Date: June 2009 Revision Date: 01/06/2011 Replaces: IM 997-4 June 28 2010

©2010 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; LONMARK, LonTalk, LONWORKS, and the LONMARK logo are managed, granted and used by LONMARK International under a license granted by Echelon Corporation; ElectroFin from AST ElectroFin Inc.; Modbus from Schneider Electric; FanTrol, MicroTech III, Open Choices, and SpeedTrol from McQuay International

2 IM 997-4

Introduction

S = Standard Efficiency H = High Efficiency

A W S XXX A D S

Air-Cooled

World Product Screw Compressor

Nominal Tons

Dual Compressor Design Vintage

Figure 1: Model Nomenclature

General Description

Daikin McQuay Pathfinder™ air-cooled chillers are complete, self-contained chillers that include the latest in engineered components arranged to provide a compact and efficient unit. Each unit is completely assembled, factory wired, evacuated, charged, tested and comes complete and ready for installation. Each of two circuits consists of an air-cooled condenser section with an integral subcooler section, a semi-hermetic, single-screw compressor with starter, a multi-circuit, shelland-tube, direct expansion evaporator, an economizer and complete refrigerant piping. Each compressor has an independent refrigeration circuit. Liquid line components included are a manual liquid line shutoff valve, charging port, filter-drier, sight-glass/moisture indicator, and electronic expansion valve. A combination discharge check and shutoff valve is included and a compressor suction shutoff valve is optional. Other features include compressor heaters, evaporator heaters for freeze protection, automatic, one-time pumpdown of each refrigerant circuit upon circuit shutdown, and an advanced fully integrated microprocessor control system.

Introduction

A high ambient option is required for operation in ambient temperatures above 100F (37.8C) and up to 125F (51.7C) and when the VFD low ambient option is selected.

Information on the operation of the unit MicroTech controller is in the OM 998 manual.

Inspection

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

Note: Unit shipping and operating weights are shown in the Physical Data Tables beginning on page 15.



III

Pathfinder units are available as standard efficiency (ADS) or high efficiency (ADH) or premium efficiency (ADP).

Table 1: Operating Limits

Maximum standby ambient temperature 130°F (55°C) Maximum operating ambient temperature 100°F (37.8°C) with optional high ambient package (see detailed information in Cat 600) 125°F (52°C) Minimum operating ambient temperature (standard control) 35°F (2°C) Minimum operating ambient temperature (with optional low-ambient control) 0°F (-18°C) Leaving chilled water temperature 40°F to 60°F (4.4°C to 15.6°C)

Leaving chilled fluid temperatures (with anti-freeze) - Unloading is not permitted with fluid leaving temperatures below 30°F (-1°C). 20°F to 60°F (-7°C to 16°C)

Operating chilled water delta-T range 6 to 18°F (-14 to -8°C) Maximum evaporator operating inlet fluid temperature 76°F (24°C) Maximum evaporator non-operating inlet fluid temperature 100°F (38°C)

IM 997-4 3

Installation and Startup

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Installation and Startup

Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and

regulations, and experienced with this type of equipment.

WARNING

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

Start-up by McQuay Factory Service is included on all Pathfinder units sold for installation within the U.S. and Canada and must be performed by them to initiate the standard Limited Product Warranty. Start-up by any party other than McQuay Factory Service or a McQuay Authorized Service Representative will void the Limited Product Warranty. Twoweek prior notification of start-up is required. The contractor should obtain a copy of the Start-up Scheduled Request Form from the sales representative or from the nearest McQuay

Factory Service office.

WARNING

Escaping refrigerant can displace air and cause suffocation. Immediately evacuate and ventilate the equipment area. If the unit is damaged, follow Environmental Protection Agency (EPA) requirements. Do not expose sparks, arcing equipment, open flame or other ignition source to the refrigerant.

For pad-mounted units, it is recommended that the unit be raised a few inches with suitable supports such as neoprene waffle vibration pads, located at least under the mounting locations. This will allow water to drain from under the unit and facilitate cleaning under it.

Figure 2: Required Lifting Method

Handling

DANGER

Improper lifting or moving of a unit can result in property damage, severe personal injury or death. Follow rigging and moving instructions carefully.

Avoid rough handling shock due to impact or dropping the unit. Do not push or pull the unit. Never allow any part of the unit to fall during unloading or moving, as this can result in serious damage.

To lift the unit, lifting tabs with 3" (76 mm) diameter holes are provided on the base of the unit. All lifting holes must be used when lifting the unit. Spreader bars and cables should be arranged to prevent damage to the condenser coils or unit cabinet (see Figure 2).

Location

Locate the unit carefully to provide proper airflow to the condenser. (SeeFigure 4, page 5 for required clearances.)Using less clearance than shown in Figure 4can cause discharge air recirculation to the condenser and could have a significant detrimental effect on unit performance.

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

4 IM 997-4

NOTES:

1. Unit with 8 lifting points illustrated above; the number of

condenser sections, fans, and lifting points can vary from this diagram.see lifting/mounting drawings beginning on page page 43 to identfy the number of lifting points for a specific unit.

2. All rigging points must be used. See weights at lifting

points beginning on page 39 for each specific size unit.

3. Crosswise and lengthwise spreader bars must be used to

avoid damage to unit.

Service Access

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

The control panels are located on the end of the chiller. The left-hand control box contains the unit and circuit microprocessors as well as transformers, fuses and terminal. The right-hand panel contains a circuit breaker. A minimum of four feet of clearance is required in front of the panels. The side clearance required for airflow provides sufficient service clearance.

On all Pathfinder units, the condenser fans and motors can be

Fan Contactors, 1 per Fan

Circuit #1

Cir# 1, Fan Circuit Breake

Fan Contactors

er Fan, Circuit #2

Phase/Voltage

Monitor

120/24V

Transforme

Line/120V

Transformer

NOTES:

1. The Emergency Switch Relay de-energizes circuit #1 and #2 control power when activated, causing an immediate compressor and fan shutdown. The red emergency button switch is located on the bottom front of the control panel door.

2. The control power transformer is located in the power panel adjacent to the control panel.

3. Additional extension (aka extension) modules are located elsewhere on the chiller.

Alarm & Limit Extension Module

MicroTech III Main Controller

Optional 115V Outlet

Cir #1 & #2 Fan Control Extension Module

Controller

Fuse

Emergency

Switch

Relay

Control

Circuit

Breaker

Unit On/Off

Switch

Circuit #1

Pumpdown

Switch

Circuit #2

Pumpdown

Switch

g, ,g

Compressor #1

Circuit Breaker

Compressor #2 Circuit Breake

5ft (1.5 m)

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

5ft (1 .5m)

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

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

3ft (1m) for service

Se e Note 5

Wall or Fence

Air Flo

No obstructions allowedabove unit at any heightSee notes 2 &

concerning wall

height at unit sides.

6ft (1 .8m)

6ft (1.8 m)

4ft (1.2 m) For electric panel access

removed from the top of the unit. The complete fan/motor assembly can be removed for service. The fan blade must be

removed for access to wiring terminals at the top of the motor.

DANGER

Disconnect, lockout and tag all power to the unit before servicing condenser fan motors or compressors. Failure to do so can cause bodily injury or death.

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

Installation and Startup

Figure 3: Control and Power Panel Component Location

Clearance Requirements

Notes:

Minimum side clearance between two units is 12 feet

(3.7 meters).

2 Unit must not be installed in a pit or enclosure that is

deeper or taller than the height of the unit unless extra clearance is provided per note 4.

3 Minimum clearance on each side is 8 feet (2.4 meters)

when installed in a pit no deeper than the unit height.

4 Minimum side clearance to a side wall or building taller

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

5 Do not mount electrical conduits where they can block

service access to compressor controls, refrigerant driers or valves.

6 There must be no obstruction of the fan discharge. 7 Field installed switches must not interfere with service

access or airflow.

Figure 4: Clearance Requirements

IM 997-4 5

Installation and Startup

AWS PACKAGE CHILLER

331994701 REV. 0D

CHARGING

VALV E

LIQUID

TUBING

BALL

VALVE

CHARGING

VALV E

SOLENOID

VALVE

FILTER DRYER

SOLENOID

VALV E

(OPTIONAL)

SIGHT GLASS

EXPANSION

VALVE

WATER I N

WATER O UT

DX EVAPORATOR

SUCTION

TUBING

OIL PRESS.

TRANSDUCER

WITH SCHRADER

VALV E

DISCHARGE

TUBING

AIR

FLOW

AIR

FLOW

CONDENSER

ASSEMBLY

F3/F4

COMPRESSOR

RELIEF

VALV E

SUCTION

TEMP. SENSOR

SUCTION

TRANSDUCER

DISCHARGE

TEMP. SENSOR

(WOE)

TEMP. SENSOR

(WIE)

TEMP. SENSOR

OUTSIDE AIR

TEMPERATURE

(WAA)

SCHRADER

VALVE

SCHRADER

VALVE

SHUT-OFF

VALV E

BUTTERFLY

VALVE

(OPTIONAL)

RELIEF

VALV E

DISCHARGE

TRANSDUCER

SCHRADER

VALV E

STRAINER

BALL

VALVE

LIQUID

INJECTION

TUBING

SCHRADER

VALVE

(HEADER)

SCHRADER

VALV E

CHARGING

VALV E

Note: Provide 20-mesh strainer

at evaporator inlet

AWS PACKAGE CHILLER

WITH ECONOMIZER

331994701 REV. 0D

CHARGING

VALV E

LIQUID

TUBING

BALL

VALV E

ECONOMIZER

ECONOMIZER FLASH GAS TO COMPRESSOR INTERSTAGE

LIQUID

INJECTION

TUBING

FILTER DRYER

SOLENOID

VALV E

(OPTIONAL)

SIGHT GLASS

EXPANSION

VALV E

WATER I N

WATER OU T

DX EVAPORATOR

SUCTION

TUBING

OIL PRESS.

TRANSDUCER

WITH SCHRADER

VALV E

DISCHARGE

TUBING

AIR

FLOW

AIR

FLOW

CONDENSER

ASSEMBLY

F3/F4

COMPRESSOR

RELIEF

VALV E

SUCTION

TEMP. SENSOR

SUCTION

TRANSDUCER

DISCHARGE

TEMP.SENSOR

(WOE)

TEMP. SENSOR

(WIE)

TEMP. SENSOR

OUTSIDE AIR

TEMPERATURE

(WAA)

SCHRADER

VALV E

SCHRADER

VALV E

SCHRADER

VALV E

CHARGING

VALV E

SOLENOID

VALV E

TGE

EXPANSION

VALV E

SHUT-OFF

VALV E

CHECK

VALV E

CHECK VALV E

BUTTERFLY

VALV E

(OPTIONAL)

RELIEF

VALV E

DISCHARGE

TRANSDUCER

BALL

VALV E

SCHRADER

VALV E

SOLENOID

VALV E

SCHRADER

VALV E

STRAINER

SCHRADER

VALV E

(HEADER)

VALV E

CHARGING

VALV E

Note: Provide 20-mesh strainer

at evaporator inlet

Figure 5: Refrigerant Diagram - All Standard Efficiency Models (one circuit shown of two or three possible circuits)

Figure 6: Refrigerant Diagram-All High and PremiumEfficiency Models (one circuit shown of two - three possible circuits)

6 IM 997-4

Installation and Startup

Building

Full Load Capacity Adjustment Factor

D=4 ft (1 .2m)

D=5 ft (1 .5m)

D=6 ft (1 .8m)

0.00

0.25

0.50

0.75

1.00

(2.4)

(4.8)

(7.2)

H - Height of W all or Building in ft. (m )

)

Full Load Power Adjustment Factor

D=4 ft (1 .2m)

D=5 ft (1 .5m)

D=6 ft (1 .8m)

0.00

0.50

1.00

1.50

2.00

(2.4)

(4.8)

(7.2)

H - Height of W all or Building in ft . (m)

Power Increase ( %)

Restricted Air Flow

The clearances required for design operation of Pathfinder aircooled chillers are described in the previous section. Occasionally, these clearances cannot be maintained due to site restrictions such as units being too close together or a fence or wall restricting airflow, or both. Pathfinder chillers have several features that may help mitigate the penalties attributable to restricted airflow.

"The condenser section is "W" shaped, as shown below. This allows inlet air for these coils to come in from both sides and the bottom. All the coils in one "V" section serve one compressor. Each compressor has its own independent refrigerant circuit.

"The MicroTech III control is proactive in response to "offdesign conditions". In the case of single or compounded influences restricting airflow to the unit, the microprocessor will act to keep the unit running (at reduced capacity), rather than allowing a shut-off on high discharge pressure.

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

The existence of a screening wall or the wall of a building in close proximity to an air-cooled chiller is common in both rooftop and ground level applications. Hot air recirculation on the coils adjoining the wall will increase compressor discharge pressure, decreasing capacity and increasing power consumption.

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

Figure 7: Unit Adjacent to Wall - Adjustment Factors

Capacity Reduction (%

IM 997-4 7

Installation and Startup

Full Load Capacity Adjustment Factor

0.00

0.50

1.00

1.50

(1.8)

(2.4)

(3.0)

(3.6)

Distance Between Units in ft. (m)

)

Full Load Power Adjustment Factor

0.00

0.50

1.00

1.50

2.00

2.50

3.00

(1.8)

(2.4)

(3.0)

(3.6)

Distance Between Units in ft. (m)

Power Increase (%)

Full Load Capacity Adjustment Factor

0.00

1.00

2.00

3.00

(2.4)

(3.6)

(4.8)

(6.1)

Distance Between Units in ft. (m)

)

Full Load Power Adjustment Factor

0.00

2.00

4.00

6.00

(2.4)12(3.6)16(4.8)20(6.1)

Distance Between Units in ft. (m)

Power Increase (%)

Case 2: Two Units Side By Side

Two or more units sited side by side are common. If spaced closer than 12 feet (3.7 meters) it is necessary to adjust the performance of each unit; circuits adjoining each other are affected. If one of the two units also has a wall adjoining it, see Case 1. Add the two adjustment factors together and apply to the unit located between the wall and the other unit.

Mounting units end to end will not necessitate adjusting performance.

Do not use pit or solid wall surrounds where the ambient air temperature exceeds 105F (40C).

Figure 8: Two Units Side by Side - Adjustment Factors

Case 3: Three or More Units Side By Side

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

Figure 9: Three or More Units - Adjustment Factor

Capacity Reduction (%

8 IM 997-4

Installation and Startup

Wall Free Area vs Distance

0.00

2.00

4.00

6.00

8.00

0 1020304050

% Open Wall Area

D - Distance from Wall to Unit in Ft. (m)

Full Load Power Adjustment Factor

D= 6 ft (1 .8m )

D=8 ft (2.4 m)

(3.1 m )

0.00

2.00

4.00

6.00

8.00

(2.4)

(3.1)

(3.7)

(4.3)

H - H eigh t of W all or Bu ilding in ft . (m )

Power Increase (% )

Case 4: Open Screening Walls

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

The distance from the sides of the unit to the side walls must be sufficient for service, such as opening control panel doors.

If each side wall is a different distance from the unit, the distances can be averaged providing either wall is not less than 8 feet (2.4 meters) from the unit. For example, do not average 4 feet and 20 feet to equal 12 feet (1 meter and 5 meters to equal 3 meters).

Figure 10: Open Screening Walls - Adjustment Factors

Case 5, Pit/Solid Wall Installation

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

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

Figure 11: Pit Installation - Adjustment Factors

D=10 ft

IM 997-4 9

Installation and Startup

Chilled Water

It is recommended that the chilled water pumps' starters be wired to, and controlled by, the chiller's microprocessor. The controller will energize the pump whenever at least one circuit on the chiller is enabled to run, whether there is a call for cooling or not. The control will also start the pump when freezing temperatures are approached. Wiring connection points are shown in Figure 62, page 78.

Water Piping

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

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

1 Vibration eliminators to reduce vibration and noise

transmission to the building.

2 Shutoff valves to isolate the unit from the piping system

during unit servicing.

3 Manual or automatic air-vent valves at the high points of

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

4 Some means of maintaining adequate system water

pressure (i.e., expansion tank or regulating valve).

5 Water temperature and pressure indicators located at the

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

6 A strainer to remove foreign matter from the water

before it enters the pump. Place the strainer far enough upstream to prevent cavitation at the pump inlet (consult pump manufacturer for recommendations). The use of a strainer will prolong pump life and help maintain high system performance levels. Note: A 20-mesh strainer must also be placed in the supply water line just prior to the inlet of the evaporator. This will aid in preventing foreign material from entering the evaporator and causing damage or decreasing its performance. Care must also be exercised if welding pipe or flanges to the evaporator connections to prevent any weld slag from entering the vessel.

7 Any water piping to the unit must be protected to prevent

freeze-up if below freezing temperatures are expected.

8 If the unit is used as a replacement chiller on a

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

9 In the event glycol is added to the water system as a late

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

10 For ice making or low temperature glycol operation, a

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

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

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

Optional Inlet Strainer

An inlet water strainer kit is available as a shipped-loose option, sized per Tab le 2 and with the pressure drop shown in

Figure 12. The kit is field installed and consists of:

• Y-type 40% open area strainer with 304 stainless steel perforated basket, Victaulic pipe connections and strainer cap

• Extension pipe with two Schrader fittings that can be used for a pressure gauge and thermal dispersion flow switch. The pipe provides sufficient clearance from the evaporator for strainer basket removal.

• ½-inch blowdown valve

• Two Victaulic clamps

Table 2: Strainer Sizing Data

AWS Model

175ADS-250ADS 210ADH-250ADH

280ADS-350ADS 280ADH-405ADH

375ADS-530ADS 445ADH-530ADH

Strainer

Size (in.)

630.572

836.0125

10 43.0 205

Strainer Plus

Pipe Length

(in.)

Strainer

Weight

(lbs)

10 IM 997-4

Installation and Startup

Figure 12: Strainer Pressure Drop

Installing Optional Inlet Strainer

The extension pipe is located adjacent to the evaporator with the strainer then mounted to it. The strainer must be mounted per manufacturer's instruction with the arrows in the direction of flow; inlet and outlet are noted along with the arrows.

Use one Victaulic clamp to mount the extension pipe to the evaporator and the second to mount the strainer to the pipe. The clamps to mount the field piping to the strainer are field supplied. The piping and strainer must be supported to prevent any stress on the evaporator nozzle.

The extension pipe has two Schrader fittings that can be used as desired, frequently for mounting the optional McQuay thermal dispersion flow switch and a water pressure gauge. The ball valve can be installed in the strainer basket cover as a blow-down valve.

System Water Volume

All chilled water systems need adequate time to recognize a load change, respond to that load change and stabilize, without undesirable short cycling of the compressors or loss of control. In air conditioning systems, the potential for short cycling usually exists when the building load falls below the minimum chiller plant capacity or on close-coupled systems with very small water volumes.

Some of the things the designer should consider when looking at water volume are the minimum cooling load, the minimum chiller plant capacity during the low load period and the desired cycle time for the compressors.

Assuming that there are no sudden load changes and that the chiller plant has reasonable turndown, a rule of thumb of "gallons of water volume equal to two to three times the chilled water gpm flow rate" is often used.

A properly designed storage tank should be added if the system components do not provide sufficient water volume.

Variable Speed Pumping

Variable water flow involves reducing the water flow through the evaporator as the load decreases. McQuay chillers are designed for this duty, provided that the rate of change in water flow is slow, and the minimum and maximum flow rates for the vessel are not exceeded.

The recommended maximum change in water flow is 10 percent of the change per minute. For example, if the maximum (design) flow is 200 gpm and the flow is reduced to a minimum of 140 gpm, the change in flow is 60 gpm, so the maximum change per minute would be 10% of 60, or 6 gpm per minute. It would take ten minutes to change the flow through the entire range.

The water flow through the vessel must remain between the minimum and maximum values listed on page 19. If flow drops below the minimum allowable, large reductions in heat transfer can occur. If the flow exceeds the maximum rate, excessive pressure drop and tube erosion can occur.

Evaporator Freeze Protection

Pathfinder chillers are equipped with thermostatically controlled evaporator heaters that help protect against freezeup down to -20°F (-28°C). For additional protection, at least one of the followingprocedures should be used during periods of sub-freezing temperatures:

1 Adding of a concentration of a glycol anti-freeze with a

freeze point 10°F. below the lowest expected temperature. This will result in decreased capacity and increased pressure drop.

Note: Do not use automotive grade antifreezes as they contain

inhibitors harmful to chilled water systems. Use only glycols specifically designated for use in building cooling systems.

Draining the water from outdoor equipment and piping and blowing the chiller tubes dry from the chiller. Do not energize the chiller heater when water is drained from the vessel.

3 Providing operation of the chilled water pump,

circulating water through the chilled water system and through the evaporator

Note: The heaters come from the factory connected to the

control power circuit. The control power can be rewired in the field to a separate 115V supply (do not wire directly to the heater). See the field wiring diagram on page 78. If this is done, it should power the entire control circuit. Mark the disconnect switch clearly to avoid accidental deactivation of the heater during freezing temperatures. Exposed chilled water piping also requires protection. If the evaporator is drained for winter freeze protection, the

IM 997-4 11

Installation and Startup

on s wit ch

1" (25mm) NPT flow switch connection

Tee

dia. min. before switch

1 1/4" (32mm) pipe

dia. min. after switch

on switch

1" (25mm) NPT flow switch connection

1 1/4" (32mm) pipe

dia. min. before switch

1 1/4" (32mm) pipe

dia. min. after switch

Tee

heaters must be de-energized to prevent heater burnout..

Table 3: Freeze Protection

% Volume Glycol Concentration Required

Temp.

F (C)

20 (6.7) 16 18 11 12

10 (-12.2) 25 29 17 20

0 (-17.8) 33 36 22 24

-10 (-23.3) 39 42 26 28

-20 (-28.9) 44 46 30 30

-30 (-34.4) 48 50 30 33

-40 (-40.0) 52 54 30 35

-50 (-45.6) 56 57 30 35

-60 (-51.1) 60 60 30 35

Note: “Freeze protection” maintains the solution in a pumpable, usable

Note: These figures are examples only and cannot be appropriate to every

Note: Glycol of less than 25% concentration is not recommended because

For Freeze Protection For Burst Protection

Ethylene

Glycol

liquid state. “Burst protection” prevents pipes from rupturing, but solution may be in a gel state and not pumpable. In most applications, “burst” protection is sufficient; concentrations over 30% Ethylene Glycol or 35% Propylene Glycol will result in efficiency and capacity losses with negligible protection increases

situation. Generally, for an extended margin of protection, select a temperature at least 15°F lower than the expected lowest ambient temperature. Inhibitor levels should be adjusted for solutions less than 25% glycol.

of the potential for bacterial growth and loss of efficiency.

Propylene

Glycol

Ethylene

Glycol

Propylene

Glycol

Flow Switch

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

A factory-mounted, solid state, thermal dispersion flow switch is available as an option. A field-installed version is also available as a kit (Accessory part number 332688401).

A paddle-type flow switch for field mounting and wiring is also available as a kit (Accessory part number 017503300). It is adaptable to pipe sizes from 1" (25mm) to 8" (203mm).

Certain minimum flow rates are required to close the switch and are listed in Table 4. Installation should be as shown in

Figure 13.

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

Table 4: Paddle Type Flow Switch Flow Rates

Pipe Size

(NOTE) - (2) (2) (3) (4) (4) (4) (5)

Flow

Min.

Adjst.

No Flow

Flow

Max.

Adjst.

No Flow

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

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

Note:

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

Note:

Flow rates for a 3-inch paddle.

Note:

Flow rates for a 6-inch paddle.

Note:

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

mm 32 38 51 63 76 102 127 153 204

gpm Lpm gpm Lpm gpm Lpm gpm Lpm

5.8 7.5 13.7 18.0 27.5 65.0 125.0 190.0 205.0

1.3 1.7 3.1 4.1 6.2 14.8 28.4 43.2 46.6

3.7 5.0 9.5 12.5 19.0 50.0 101.0 158.0 170.0

0.8 1.1 2.2 2.8 4.3 11.4 22.9 35.9 38.6

13.3 19.2 29.0 34.5 53.0 128.0 245.0 375.0 415.0

3.0 4.4 6.6 7.8 12.0 29.1 55.6 85.2 94.3

12.5 18.0 27.0 32.0 50.0 122.0 235.0 360.0 400.0

2.8 4.1 6.1 7.3 11.4 27.7 53.4 81.8 90.8

Fl ow di r e ction marked

Flow direction marked

1 1/ 4" (32 mm ) pipe

12 IM 997-4

Installation and Startup

Drain

Gate

Water

Strainer

Eliminator

Pressure

Gauge

Out

Protect All Field Piping

Against Freezing

Flow

Eliminator

Flow

Switch

Balancing

Gate

Flow

Liquid

Suction

  

TDelta

factorflowtons

GPM

Figure 13: Typical Field Water Piping

Vent

Vibration

Valved

Vibration

Valve

Note: Connections for vent and drain fittings are located on the

top and bottom of the evaporator.

Note: Piping must be supported to avoid putting strain on the

evaporator nozzles.

Refrigerant Charge

All packaged units are designed for use with R-134a and are shipped with a full operating charge. The operating charge for each unit is shown in the Physical Data Tables beginning on

page 15.

Glycol Solutions

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

Note: The procedure below does not specify the type of glycol. Use the derate factors found in Table 5 or Table 6 forcorrections when using glycol.

1 Capacity - Cooling capacity is reduced from that with

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

2 Flow - To determine flow (or Delta-T) knowing Delta-T

(or flow) and capacity:

3 Pressure drop - To determine pressure drop through the

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

4 Power - To determine glycol system kW, multiply the

water system kW by the factor designated "Power".

Note: Do not use automotive grade antifreeze. Industrial grade glycols

must be used. Automotive antifreeze contains inhibitors that will cause plating on the copper tubes within the chiller evaporator. The type and handling of glycol used must be consistent with local codes.

Performance Adjustment Factors

Ethylene and Propylene Glycol Factors

AWS chiller units are designed to operate with leaving chilled fluid temperatures of 20.0°F to 60.0°F (-6.7°C to 15.6°C). Consult the local McQuay sales office for performance outside these temperatures. Leaving chilled fluid temperatures below 40°F (4.4°C) result in evaporating temperatures at or below the freezing point of water and a glycol solution is required. MicroTech III control inhibits compressor unloading at leaving fluid temperatures below 30°F (-1°C). McQuay also recommends optional double insulation, and the system designer should determine its necessity. The use of glycol will reduce the performance of the unit depending on its concentration. Take this into consideration during initial system design. On glycol applications, the supplier typically recommends that a minimum of 25% solution by weight be used for protection against corrosion, or additional inhibitors will be

required.

Table 5: Ethylene Glycol Correction Factors

% E.G

10 26 -3.3 0.996 0.998 1.036 1.097 20 18 -7.8 0.988 0.994 1.061 1.219 30 7 -13.9 0.979 0.991 1.092 1.352 40 -7 -21.7 0.969 0.986 1.132 1.532 50 -28 -33.3 0.958 0.981 1.182 1.748

Table 6: Propylene Glycol Correction Factors

% P.G

10 26 -3.3 0.991 0.996 1.016 1.092 20 19 -7.2 0.981 0.991 1.032 1.195 30 9 -12.8 0.966 0.985 1.056 1.345 40 -5 -20.6 0.947 0.977 1.092 1.544 50 -27 -32.8 0.932 0.969 1.14 1.906

Freeze Point

Capacity Power Flow PD

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

IM 997-4 13

Installation and Startup

Table 7: Ambient Freeze Protection

Percent Volume Glycol Concentration Required For Freeze Protection For Burst Protection

Temperature

F (C)

20 (6.7) 16 18 11 12

10 (-12.2) 25 29 17 20

0 (-17.8) 33 36 22 24

-10 (-23.3) 39 42 26 28

-20 (-28.9) 44 46 30 30

-30 (-34.4) 48 50 30 33

-40 (-40.0) 52 54 30 35

-50 (-45.6) 56 57 30 35

-60 (-51.1) 60 60 30 35

Note: “Freeze protection” maintains the solution ina pumpable, usable

liquid state. “Burst protection” prevents pipes from rupturing, but the solution may be in a gel state and not pumpable. In most applications, “burst” protection is sufficient; concentrations over 30% Ethylene Glycol or 35% Propylene Glycol will result in efficiency and capacity losses with negligible protection increases.

Note: These figures are examples only and may not be appropriate to

every situation. Generally, for an extended margin of protection, select a temperature at least 15°F (-12°C) lower than the expected lowest ambient temperature. Adjust inhibitor levels for solutions less than 25% glycol

Note: Glycol of less than 25% concentration is not recommended because

of the potential for bacterial growth and subsequent loss of heat transfer efficiency. Additional inhibitors may be required.

Ethylene

Glycol

Propylene

Glycol

Ethylene

Glycol

Propylene

Glycol

Electrical Connections

All wiring must be done in accordance with applicable local and national codes. Pathfinder units can be ordered with either standard multi-point power or optional single point power connections and with various disconnect and circuit breaker options. Wiring within the unit is sized in accordance with the

U.S.A. National Electrical Code. Field-supplied disconnect switches are required if not factory-supplied with the unit.

Table 8: Electric Power Connection Option

Multi-Point

Power Connection

Disconnect switch per circuit, no

compressor isolation circuit breakers

High short circuit current rated panel

with disconnect switch and no

Note: Disconnect switches are molded case construction with lockable

Note: The individual compressor isolation circuit breakers for each circuit

Note: The high short circuit rated panel means that a short circuit current

Note: The factory-mounted control power transformer is protected by fuses. Note: Condenser fans are protected and isolated by circuit breakers.

Standard:

Optional:

isolation circuit breakers

through-the-door handles. They can be used to remove the unit/ circuit from the power system.

isolate the compressor and do not have through-the-door handles. They are operable only after the panel doors are opened.

up to the ratings shown in Table 9, Interrupt Ratings (kAmps)will be contained in the panel. There is a short period of time when the circuit breaker will short circuit before opening a circuit that can damage downstream components. In other words, the enclosure is stronger than a standard enclosure. It has a high interrupt rated disconnect switch.

One disconnect switch replacing

panel with disconnect switch and

Single-Point

Power Connection

one power block, compressor

the power block, compressor

High short circuit current rated

compressor isolation circuit

Optional:

isolation circuit breakers

Optional:

isolation circuit breakers

Optional:

breakers

Table 9: Interrupt Ratings (kAmps)

STANDARD

VOLTAGE

208-230 10kA 100kA 208-230

380 10kA 65kA 380 460 10kA 65kA 460 575 5kA 25kA 575

SHORT

CIRCUIT

PANEL

RATING

HIGH SHORT

CIRCUIT

RATED PANEL

VOLTAGE

Disconnecting means are addressed by Article 440 of the U.S.A. National Electrical Code (NEC), which requires “disconnecting means capable of disconnecting air conditioning and refrigerating equipment including motorcompressors, and controllers from the circuit feeder.” Select and locate the disconnect switch per the NEC guidelines. Maximum recommended fuse sizes are given in the electrical data tables of this catalog for help in sizing the disconnect.

Terminals are provided in a unit control panel for optional field hookup of the control circuit to a separate fused 115-volt power supply in lieu of the standard factory installed control transformer.

14 IM 997-4

Physical Data (non-VFD)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2

BASIC DATA

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg) 145 (66) 145 (66) 165 (75) 165 (75) 165 (75) 165 (75) Unit Dimensions L x W x H, in . (m m ) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg) Weight-Add for Copper Fins, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 90 (316) 90 (316) 90 (316) 100 (351) 100 (351) 100 (351) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 4.5 (17) 4.5 (17) 4.5 (17) 5.5 (21) 5.5 (21) 5.5 (21)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Pumpdown Capacity, lbs (kg) 208 (94) 208 (94) 250 (113) 250 (113) 250 (113) 250 (113) Coil Inlet Face Area, sq. ft. (sq. m.) 123.1 (11.4) 123.1 (11.4) 147.7 (13.7) 147.7 (13.7) 147.7 (13.7) 147.7 (13.7) Rows Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m/s) Airflow, cfm (l/s)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (m m) Max. Water Pressure, psi (kPa)

Max. Refrigerant Press., psi (kPa)

160 (73) 160 (73)

133020 (62778) 133020 (62778)

6984 (35)

152 (1048) 152 (1048) 152 (1048)

16 x 406 (406 x 2750)

63 (240)

6 (168) 6 (168) 6 (168)

67 (255) 67 (255)

325 (2241) 325 (2241) 325 (2241)

14208 (6445) 13665 (6198)

16 x 108 (406 x 2750) 16 x 108 (406 x 2750)

6984 (35) 6984 (35)

1.4 (1.05) 1.4 (1.05)

788 (357)

160 (73)

477 (216) 477 (216)

1786 (810) 1786 (810)

850 850 850

666

1.4 (1.05)

477 (216)

15 15 15

110850 (52315)

676 (307) 788 (357)

12950 (5874) 13673 (6202)

12407 (5628) 13130 (5956)

1786 (810)

245 x 88 x 100 245 x 88 x 100 245 x 88 x 100

(6220 x 2225 x 2548) (6220 x 2225 x 2548) (6220 x 2225 x 2548)

173 (608) 196 (690) 216 (760)

Data

AWS175ADS AWS190ADS AWS210ADS

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Table 10: Physical Data (60 Hz, Standard Efficiency, non-VFD models)

Weight-Add for Louvered Panels, lbs (kg) Weight-Add for Sound Enclosures, lbs (k

Physical Data (non-VFD)

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm)

IM 997-4 15

Physical Data (non-VFD)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2

BASIC DATA

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg) 185 (84) 185 (84) 185 (84) 185 (84) 210 (95) 210 (95) Unit Dimensions L x W x H, i n. (m m) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg) Weight-Add for Copper Fins, lbs (kg) Weight-Add for Louvered Panels, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 100 (351) 125 (439) 125 (439) 125 (439) 125 (439) 150 (528) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 6 (23)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Pumpdown Capacity, lbs (kg) 291 (132) 291 (132) 291 (132) 291 (132) 333 (151) 333 (151) Coil Inlet Face Area, sq. ft. (sq. m.) 172.3 (16.0) 172.3 (16.0) 172.3 (16.0) 172.3 (16.0) 169.9 (18.3) 169.9 (18.3) Rows Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m /s) Airflow, cfm (l/s)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm ) Max. Water Pressure, ps i (kPa)

Max. Refrigerant Press., psi (kPa)

160 (73) 160 (73)

900 (408) 477 (216)

253 (888)

280 x 88 x 100

(7121 x 2225 x 2548)

15669 (7107)

155190 (73241)

16 x 108 / (406 x 2750)

152 (1048) 325 (2241)

155190 (73241)

325 (2241)

103 (390)

8 (219)

152 (1048)

16 x 108 / (406 x 2750)

61 (232)

6 (168)

152 (1048)

61 (232)

6 (168)

20 x 108 / (508 x 2750)

274 (962)

316 x 88 x 100

(8022 x 2225 x 2548)

17012 (7717)

477 (216)

160 (73)

6984 (35)

16145 (7323)

2372 (1076)

1012 (459)

1.4 (1.05)

15126 (6861)

850

2084 (945)

177360 (83704)

325 (2241)

1.4 (1.05) 850

1.4 (1.05)

6984 (35)

850

6984 (35)

900 (408) 477 (216)

14838 (6730)

2084 (945)

AWS230ADS AWS250ADS

280 x 88 x 100

(7121 x 2225 x 2548)

15381 (6977)

Data

AWS280ADS

230 (808)

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Table 11: Physical Data (60 Hz, Standard Efficiency, non-VFD models)

Weight-Add for Sound Enclosures, lbs (k

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm)

16 IM 997-4

Table 12: Physical Data (60 Hz, Standard Efficiency, non-VFD models)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2

BASIC DATA

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg) 215 (98) 215 (98) 265 (120) 265 (120) 265 (120) 265 (120) Unit Dimensions L x W x H, in. (mm ) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg) Weight-Add for Copper Fins, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 150 (528) 150 (528) 150 (128) 175 (615) 175 (615) 175 (615) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 6 (23) 6 (23) 6 (23) 6 (23) 6 (23) 6 (23)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Pumpdown Capacity, lbs (kg) 333 (151) 333 (151) 416 (189) 416 (189) 416 (189) 416 (189) Coil Inlet Face Area, sq. ft. (sq. m.) 169.9 (18.3) 169.9 (18.3) 246.1 (22.8) 246.1 (22.8) 246.1 (22.8) 246.1 (22.8) Rows Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m/s) Airflow, cfm (l/s)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa)

Max. Refrigerant Press., psi (kPa)

1.4 (1.05)

850 850 850

10 10

6984 (35) 6984 (35) 6984 (35)

177360 (83704) 221700 (104630) 221700 (104630)

19656 (8916)

160 (73) 160 (73)

99 (374) 99 (374)

20 x 108 / (508 x 2750)

103 (390)

325 (2241) 325 (2241) 325 (2241)

8 (219) 8 (219) 8 (219)

152 (1048) 152 (1048) 152 (1048)

20 x 108 / (508 x 2750)

8810

20 x 108 / (508 x 2750)

1.4 (1.05) 1.4 (1.05)

477 (216) 477 (216) 477 (216)

15 15 15

160 (73)

2372 (1076) 2968 (1346) 2968 (1346)

1012 (459) 1236 (561) 1236 (561)

16857 (7646) 18789 (8523) 18789 (8523)

Data

AWS300ADS AW S320ADS AW S350ADS

291 (1021) 327 (1151) 350 (1229)

316 x 88 x 100 387 x 88 x 100 387 x 88 x 100

(9823 x 2225 x 2548)

17724 (8040) 19656 (8916)

(8026 x 2225 x 2548) (9823 x 2225 x 2548)

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Weight-Add for Louvered Panels, lbs (kg) Weight-Add for Sound Enclosures, lbs (k

Physical Data (non-VFD)

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm)

IM 997-4 17

Physical Data (non-VFD)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 3 CIRCUIT 1 CIRCUIT 2 CIRCUIT 3

BASIC DATA

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg) 185 (84) 185 (84) 220 (100) 185 (84) 185 (84) 220 (100) Unit Dimensions L x W x H, i n . (m m ) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg) Weight-Add for Copper Fins, lbs (kg) Weight-Add for Louvered Panels, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 125 (439) 125 (439) 125 (439) 125 (439) 125 (439) 150 (528) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 6 (23)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Pumpdown Capacity, lbs (kg) 291 (132) 291 (132) 333 (151) 291 (132) 291 (132) 333 (151) Coil Inlet Face Area, sq. ft. (sq. m.) 172.3 (16.0) 172.3 (16.0) 169.9 (18.3) 172.3 (16.0) 172.3 (16.0) 169.9 (18.3) Rows Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m /s) Airflow, cfm (l/s)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa)

Max. Refrigerant Press., psi (kPa)

438 x 88 x 100

(11123 x 2225 x 2548)

1348 (611)

776 (352)

23885 (10834) 22486 (10200)

3256 (1477)

1348 (611)

776 (352)

6984 (35)

152 (1048)

10 (273)

152 (1048)

325 (2241) 325 (2241)

6984 (35)

266040 (125556) 243870 (115094)

26 x 130 / (660 x 3300)

230 (871)

26 x 130 / (660 x 3300)

225 (850)

10 (273)

1.4 (1.05) 850

120 (55) 120 (55)

778

(11123 x 2225 x 2548)

24570 (11145) 23171 (10510)

3256 (1477)

Data

398 (1401)

438 x 88 x 100

AWS375ATS

398 (1401)

AWS400ATS

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Table 13: Physical Data (60 Hz, Standard Efficiency, non-VFD models)

Weight-Add for Sound Enclosures, lbs (k

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm)

18 IM 997-4

Table 14: Physical Data (60 Hz, Standard Efficiency, non-VFD models)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 3 CIRCUIT 1 CIRCUIT 2 CIRCUIT 3

BASIC DATA

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg) 210 (95) 210 (95) 220 (100) 210 (95) 210 (95) 220 (100)

Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg) Weight-Add for Copper Fins, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

COMPRESSORS, SCREW , SEMI-HERMETIC

Nominal Capacity, tons (kW) 125 (439) 150 (528) 150 (528) 150 (528) 150 (528) 150 (528) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 5.5 (21) 6 (23) 6 (23) 6 (23) 6 (23) 6 (23)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Pumpdown Capacity, lbs (kg) 333 (151) 333 (151) 333 (151) 333 (151) 333 (151) 333 (151) Coil Inlet Face Area, sq. ft. (sq. m.) 169.9 (18.3) 169.9 (18.3) 169.9 (18.3) 169.9 (18.3) 169.9 (18.3) 169.9 (18.3) Rows Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m/s)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (m m) Max. Water Pres s ure, psi (kPa)

Max. Refrigerant Press., psi (kPa)

120 (55) 120 (55)

AWS425ATS AWS445ATS

448 (1575)

26830 (12170)

27506 (12477)

419 (1472)

1.4 (1.05)

850

1.4 (1.05) 850

1460 (662)

776 (352)

1460 (662)

325 (2241) 325 (2241)

10 (273)

152 (1048)

10 (273)

152 (1048)

220 (831)

6984 (35)

8888

776 (352)

25431 (11535)

3553 (1612)

26107 (11842)

3553 (1612)

Data

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Physical Data (non-VFD)

Unit Dimensions L x W x H , i n. (m m)

Weight-Add for Louvered Panels, lbs (kg) Weight-Add for Sound Enclosures, lbs (k

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm)

Airflow, cfm (l/s)

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

473 x 88 x 100

(12024 x 2225 x 2548)

266040 (125556)

26 x 130 / (660 x 3300)

473 x 88 x 100

(12024 x 2225 x 2548)

266040 (125556)

26 x 130 / (660 x 3300)

IM 997-4 19

Physical Data (non-VFD)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 3 CIRCUIT 1 CIRCUIT 2 CIRCUIT 3

BASIC DATA

Unit Cap. @ AHR I tons (kW) Unit Operating Charge lbs (kg) 210 (95) 210 (95) 280 (127) 265 (120) 265 (120) 220 (100)

Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg) Weight-Add for Copper Fins, lbs (kg) Weight-Add for Louvered Panels, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 150 (528) 150 (528) 175 (615) 175 (615) 175 (615) 150 (528) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 6 (23) 6 (23) 6 (23) 6 (23) 6 (23) 6 (23)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Pumpdown Capacity, lbs (kg) 333 (151) 333 (151) 416 (189) 416 (189) 416 (189) 333 (151) Coil Inlet Face Area, sq. ft. (sq. m.) 169.9 (18.3) 169.9 (18.3) 246.1 (22.8) 246.1 (22.8) 246.1 (22.8) 169.9 (18.3) Rows Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m /s)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm ) Max. Water Pressure, psi (kPa)

Max. Refrigerant Press., psi (kPa)

120 (55)

10 8

325 (2241) 325 (2241)

10 (273)

152 (1048)

10 (273)

152 (1048)

220 (831)

6984 (35)

1.4 (1.05) 850

6984 (35)

8 8 10 10

1572 (713)

776 (352)

1684 (764)

776 (352)

120 (55)

27232 (12352)

3870 (1755)

28109 (12750)

4168 (1891)

28631 (12987)

29508 (13385)

478 (1681)

511 (1798)

Data

AWS470ATS AWS500ATS

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Table 15: Physical Data (60 Hz, Standard Efficiency, non-VFD models)

Unit Dimensions L x W x H , i n. (m m)

Weight-Add for Sound Enclosures, lbs (k

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm)

Airflow, cfm (l/s)

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

509 x 88 x 100

(12921 x 2225 x 2548)

288210 (136019) 310380 (146482)

26 x 130 / (660 x 3300)

544 x 88 x 100

(13823 x 2225 x 2548)

26 x 130 / (660 x 3300)

20 IM 997-4

Table 16: Physical Data (60 Hz, Standard Efficiency, non-VFD models)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 3

BASIC DATA

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg) 270 (122) 270 (122) 280 (127) Unit Dimensions L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg) Weight-Add for Copper Fins, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 175 (615) 175 (615) 175 (615) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 6 (23) 6 (23) 6 (23)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Pumpdown Capacity, lbs (kg) 416 (189) 416 (189) 416 (189) Coil Inlet Face Area, sq. ft. (sq. m.) 246.1 (22.8) 246.1 (22.8) 246.1 (22.8) Rows Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16

CONDENSER FANS, DIRECT DRIVE PROPELLER TYPE

Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m/s) Airflow, cfm (l/s)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length, in.(mm) Water Volum e, gallons (liters ) Victaulic inlet/outlet conn. in. (m m ) Max. Water Press ure, psi (kPa)

Max. Refrigerant Press., psi (kPa)

120 (55)

325 (2241)

10 (273)

152 (1048)

26 x 130 / (660 x 3300)

220 (831)

6984 (35)

332550 (156945)

1.4 (1.05) 850

10 10 10

1796 (815)

776 (352)

28949 (13131)

4466 (2026)

(14722 x 2225 x 2548)

30348 (13766)

541 (1902)

580 x 88 x 100

Data

AWS530ATS

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Weight-Add for Louvered Panels, lbs (kg) Weight-Add for Sound Enclosures, lbs (k

Physical Data (non-VFD)

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm)

IM 997-4 21

Physical Data (non-VFD)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg)

180 (82) 180 (82) 200 (90) 220 (100) 220 (100) 220 (100)

Unit Dimensions L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg)

Weight-Add for Copper Fins, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

Nominal Capacity, tons (kW) 100 (351) 100 (351) 100 (351) 125 (439) 125 (439) 125 (439) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 4.5 (17) 4.5 (17) 4.5 (17) 5.5 (21) 5.5 (21) 5.5 (21)

Pumpdown Capacity, lbs (kg) 250 (113) 250 (113) 291 (132) 291 (132) 291 (132) 291 (132) Coil Inlet Face Area, sq. f t. (sq. m.) 147.7 (13.7) 147.7 (13.7) 172.3 (16.0) 172.3 (16.0) 172.3 (16.0) 172.3 (16.0) Row s Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm) Fan Motor, hp (kW)

Fan & Motor RPM Fan Tip Speed, fpm (m/s) Airflow , cfm (l/s)

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa) Max. Refrigerant Press., psi (kPa)

160 (73) 160 (73) 160 (73)

788 (357) 900 (408) 900 (408)

EVAPORAT OR, DIRECT EXPANSION SHELL AND T UBE

325 (2241) 325 (2241) 325 (2241)

6 (168) 6 (168) 6 (168)

152 (1048) 152 (1048) 152 (1048)

16 x 108 / (406 x 2750) 16 x 108 / (406 x 2750) 16 x 108 / (406 x 2750)

63 (240) 61 (232) 61 (252)

6984 (35) 6984 (35) 6984 (35)

133020 (62778) 155190 (73241) 155190 (73241)

1.4 (1.05) 1.4 (1.05) 1.4 (1.05) 850 850 850

15 15 15

667777

CONDENSER FANS, DIRECT DRIV E PROPELLER TYPE

477 (216)

12868 (5837) 14564 (6606) 15126 (6861)

1876 (851) 2084 (945) 2084 (945)

477 (216) 477 (216)

(6220 x 2225 x 2548) (7121 x 2225 x 2548) (7121 x 2225 x 2548)

13411 (6083) 15107 (6852) 15669 (7107)

207 (728) 233 (820) 254 (892)

245 x 88 x 100 280 x 88 x 100 280 x 88 x 100

Dat a

AWS210 ADH AWS23 0ADH AWS250ADH

BASI C DATA

COMPRESSORS, SCREW, SEMI-HERMETIC

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Table 17: Physical Data (60 Hz, High Efficiency, non-VFD models)

Weight-Add for Louvered Panels, lbs (kg) Weight-Add for Sound Enclosures, lbs (k

22 IM 997-4

Table 18: Physical Data (60 Hz, High Efficiency, non-VFD models)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg)

230 (104) 250 (113) 250 (113) 250 (113) 260 (118) 285 (129)

Unit Dimensions L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg)

Weight-Add for Copper Fins, lbs (kg) Weight-Add for Louvered Panels, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

Nominal Capacity, tons (kW) 125 (439) 150 (528) 150 (528) 150 (528) 150 (528) 175 (615) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 6 (23)

Pumpdow n Capacity, lbs (kg) 333 (151) 333 (151) 333 (151) 333 (151) 416 (189) 416 (189) Coil Inlet Face Area, sq. ft. (sq. m.) 169.9 (18.3) 169.9 (18.3) 169.9 (18.3) 169.9 (18.3) 246.1 (22.8) 246.1 (22.8) Row s Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm) Fan Motor, hp (kW)

Fan & Motor RPM Fan Tip Speed, f pm (m/s) Airflow , cfm (l/s)

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa) Max. Refrigerant Press., psi (kPa)

160 (73) 160 (73) 160 (73)

325 (2241) 325 (2241) 325 (2241)

8 (219) 8 (219) 8 (219)

152 (1048) 152 (1048) 152 (1048)

20 x 108 / (508 x 2750) 20 x 108 / (508 x 2750) 20 x 108 / (508 x 2750)

103 (390) 103 (390) 99 (374)

6984 (35) 6984 (35) 6984 (35)

177360 (83704) 177360 (83704) 221700 (104630)

1.4 (1.05) 1.4 (1.05) 1.4 (1.05) 850 850 850

15 15 15

88881010

1012 (459) 1012 (459) 1236 (561)

477 (216) 477 (216) 477 (216)

16141 (7322) 16141 (7322) 18619 (8446)

2372 (1076) 2372 (1076) 2968 (1346)

(8022 x 2225 x 2548) (8022 x 2225 x 2548) (9823 x 2225 x 2548)

17008 (7715) 17008 (7715) 19486 (8839)

272 (956) 293 (1030) 327 (1151)

316 x 88 x 100 316 x 88 x 100 387 x 88 x 100

Dat a

AWS280 ADH AWS30 0ADH AWS320 ADH

EVAPORA TOR, DIRECT EXPANSI ON SHELL A ND T UBE

CONDENSER FANS, DIRECT DRI V E PROPELL ER T YPE

BASI C DAT A

COMPRESSORS, SCREW, SEMI- HERM ETIC

CONDENSERS, HI GH EFFI CIENCY FIN A ND TUBE TYPE

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Weight-Add for Sound Enclosures, lbs (k

Physical Data (non-VFD)

IM 997-4 23

Physical Data (non-VFD)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg)

285 (129) 285 (129) 285 (129) 331 (150) 331 (150) 331 (150)

Unit Dimensions L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg)

Weight-Add for Copper Fins, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

Nominal Capacity, tons (kW)

175 (615) 175 (615) 175 (615) 200 (703) 200 (703) 200 (703) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters)

6 (23) 6 (23) 6 (23) 6 (23) 6 (23) 6 (23)

Pumpdown Capacity, lbs (kg)

416 (189) 416 (189) 416 (189) 500 (227) 500 (227) 500 (227) Coil Inlet Face Area, sq. f t. (sq. m.)

246.1 (22.8) 246.1 (22.8) 246.1 (22.8) 295.3 (27.4) 295.3 (27.4) 295.3 (27.4)

Row s Deep/Fins Per Inch

3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm) Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, f pm (m/s) Airflow , cfm (l/s)

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa) Max. Refrigerant Press., psi (kPa)

160 (73) 160 (73) 160 (73)

BASI C DAT A

COMPRESSORS, SCREW, SEMI-HERMETIC

CONDENSER FANS, DIRECT DRIV E PROPELLER TYPE

EVAPORAT OR, DIRECT EXPANSION SHELL A ND T UBE

325 (2241) 325 (2241) 325 (2241)

20 x 108 / (508 x 2750) 20 x 108 / (508 x 2750)

99 (374)

8 (219) 8 (219) 8 (219)

152 (1048) 152 (1048) 152 (1048)

99 (374) 99 (374)

6984 (35) 6984 (35) 6984 (35)

221700 (104630) 243870 (115094) 266040 (125556)

20 x 108 / (508 x 2750)

1.4 (1.05) 1.4 (1.05) 1.4 (1.05) 850 850 850

15 15 15

10 10 10 12 12 12

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

1236 (561) 1348 (611) 1460 (662)

477 (216) 477 (216) 477 (216)

18789 (8523) 20265 (9192) 21048 (9547)

2968 (1346) 3256 (1477) 3553 (1612)

(9823 x 2225 x 2548) (11123 x 2225 x 2548) (12024 x 2225 x 2548)

19656 (8916) 21132 (9585) 21915 (9941)

336 (1183) 366 (1285) 395 (1388)

387 x 88 x 100 438 x 88 x 100 473 x 88 x 101

Dat a

AWS350 ADH AWS38 0ADH AWS405 ADH

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Table 19: Physical Data (60 Hz, High Efficiency, non-VFD models)

Weight-Add for Louvered Panels, lbs (kg) Weight-Add for Sound Enclosures, lbs (k

24 IM 997-4

Table 20: Physical Data (60 Hz, High Efficiency, non-VFD models)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 3 CIRCUIT 1 CIRCUIT 2 CIRCUIT 3

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg)

250 (113) 250 (113) 250 (113) 250 (113) 250 (113) 295 (134)

Unit Dimensions L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg)

Weight-Add for Copper Fins, lbs (kg) Weight-Add for Louvered Panels, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

Nominal Capacity, tons (kW)

150 (528) 150 (528) 150 (528) 150 (528) 150 (528) 175 (615) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters)

5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 6 (23)

Pumpdow n Capacity, lbs (kg)

333 (151) 333 (151) 333 (151) 333 (151) 333 (151) 416 (189) Coil Inlet Face Area, sq. ft. (sq. m.)

169.9 (18.3) 169.9 (18.3) 169.9 (18.3) 169.9 (18.3) 169.9 (18.3) 246.1 (22.8)

Rows Deep/Fins Per Inch

3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm) Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m/s) Airflow , cfm (l/s)

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters ) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa) Max. Refrigerant Press., psi (kPa)

120 (55) 120 (55)

1460 (662)

776 (352)

325 (2241)

288210 (136019)

26 x 130 / (660 x 3300)

225 (850)

26 x 130 / (660 x 3300)

220 (831)

850

6984 (35)

266040 (125556)

10 (273)

152 (1048)

1.4 (1.05)

1572 (713)

776 (352)

24191 (10973)

3553 (1612)

25726 (11669)

3870 (1755)

(12024 x 2225 x 2548)

25590 (11608)

(12921 x 2225 x 2548)

27125 (12304)

438 (1540)

473 x 88 x 100

468 (1645)

509 x 88 x 100

Dat a

AWS470ATH

EVAPORA T OR, DIRECT EXPA NSI ON SHEL L AND TUBE

10 (273)

152 (1048)

325 (2241)

BASI C DAT A

COMPRESSORS, SCREW, SEMI-HERMETIC

AWS445ATH

850

6984 (35)

CONDENSERS, HIGH EFFIC IENCY FIN A ND T UBE TYPE

CONDENSER FANS, DI RECT DRIV E PROPEL L ER TYPE

8888810

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Weight-Add for Sound Enclosures, lbs (k

Physical Data (non-VFD)

IM 997-4 25

Physical Data (non-VFD)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 3 CIRCUIT 1 CIRCUIT 2 CIRCUIT 3

BASIC DAT A

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg)

295 (134) 295 (134) 250 (113) 295 (134) 295 (134) 295 (134)

Unit Dimensions L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg)

Weight-Add for Copper Fins, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW) 175 (615) 175 (615) 150 (528) 175 (615) 175 (615) 175 (615) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters) 6 (23) 6 (23) 5.5 (21) 6 (23) 6 (23) 6 (23)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Pumpdow n Capacity, lbs (kg) 416 (189) 416 (189) 333 (151) 416 (189) 416 (189) 416 (189) Coil Inlet Face Area, sq. ft. (sq. m.) 246.1 (22.8) 246.1 (22.8) 169.9 (18.3) 246.1 (22.8) 246.1 (22.8) 246.1 (22.8) Rows Deep/Fins Per Inch 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

CONDENSER FANS, DIRECT DRIV E PROPELL ER T YPE

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm) Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m/s) Airflow , cfm (l/s)

EVAPORATOR, DIRECT EXPANSION SHELL AND TUBE

Shell Dia.-Tube Length, in.(mm) Water V olume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa) Max. Refrigerant Press., psi (kPa)

120 (55) 120 (55)

332550 (156945)310380 (146482)

10 (273)

152 (1048)

10 (273)

152 (1048)

26 x 130 / (660 x 3300)

220 (831)

26 x 130 / (660 x 3300)

220 (831)

6984 (35) 6984 (35)

1.4 (1.05) 1.4 (1.05)

1010 8 101010

850 850

1684 (764)

776 (352)

27699 (12564)

4168 (1891)

(13823 x 2225 x 2548)

29098 (13199)

493 (1734)

544 x 88 x 100

Dat a

AWS500ATH AWS530ATH

525 (1845)

580 x 88 x 100

(14722 x 2225 x 2548)

30348 (13766) 28949 (13131)

4466 (2026)

1796 (815)

776 (352)

325 (2241)325 (2241)

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Table 21: Physical Data (60 Hz, High Efficiency, non-VFD models)

Weight-Add for Louvered Panels, lbs (kg) Weight-Add for Sound Enclosures, lbs (k

26 IM 997-4

Table 22: Physical Data (60 Hz, Premium Efficiency, non-VFD models)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg)

200 (91) 200 (91) 225 (102) 225 (102) (235) (107) (235) (107)

Unit Dimensions L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg)

Weight-Add for Copper Fins, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

Nominal Capacity, tons (kW)

100 (351) 100 (351) 100 (351) 125 (439) 125 (439) 125 (439) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters)

4.5 (17) 4.5 (17) 4.5 (17) 5.5 (21) 5.5 (21) 5.5 (21)

Pumpdow n Capacity, lbs (kg)

333 (151) 333 (151) 375 (170) 375 (170) 375 (170) 375 (170) Coil Inlet Face Area, sq. f t. (sq. m.)

169.9 (18.3) 169.9 (18.3) 221.5 (20.6) 221.5 (20.6) 221.5 (20.6) 221.5 (20.6)

Row s Deep/Fins Per Inch

3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm) Fan Motor, hp (kW)

Fan & Motor RPM Fan Tip Speed, fpm (m/s) Airflow , cfm (l/s)

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa) Max. Refrigerant Press., psi (kPa)

160 (73) 160 (73) 160 (73)

EVAPORATOR, DIRECT EXPANSI ON SHELL AND TUBE

Dat a

AWS210ADP AWS230ADP AWS250 ADP

213 (750) 239 (840) 260 (915)

316 x 88 x 100 351 x 88 x 100 351 x 88 x 100

(8022 x 2225 x 2548) (8923 x 2225 x 2548) (8923 x 2225 x 2548)

16812 (7626) 18327 (8313) 20200 (9163) 15560 (7058) 17075 (7745) 18547 (8413)

2372 (1076) 2679 (1215) 2679 (1215)

1012 (459) 1124 (510) 1124 (510)

477 (216) 477 (216) 477 (216)

15 15 15

CONDENSER FANS, DIRECT DRIV E PROPELLER TYPE

1.4 (1.05) 1.4 (1.05) 1.4 (1.05)

8899

850 850 850

6984 (35) 6984 (35) 6984 (35)

177360 (83704) 199530 (94167) 199530 (94167)

20 x 154 / (508 x 3900) 20 x 154 / (508 x 3900) 26 x 154 / (660 x 3900)

154 (582) 154 (582) 267 (1011)

8 (2199 8 (219) 10 (273) 152 (1048) 152 (1048) 152 (1048) 325 (2241) 325 (2241) 325 (2241)

BASI C DATA

COMPRESSORS, SCREW, SEMI-HERMETIC

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Weight-Add for Louvered Panels, lbs (kg) Weight-Add for Sound Enclosures, lbs (k

Physical Data (non-VFD)

IM 997-4 27

Physical Data (non-VFD)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg)

250 (113) 250 (113) 260 (118) 260 (118) 260 (118) 300 (136) Unit Dimensions L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg)

Weight-Add for Copper Fins, lbs (kg) Weight-Add for Louvered Panels, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

Nominal Capacity, tons (kW)

125 (439) 150 (528) 150 (528) 150 (528) 150 (528) 175 (615) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters)

5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 5.5 (21) 6 (23)

Pumpdow n Capacity, lbs (kg)

416 (189) 416 (189) 416 (189) 416 (189) 416 (189) 500 (227) Coil Inlet Face Area, sq. ft. (sq. m.)

246.1 (22.8) 246.1 (22.8) 246.1 (22.8) 246.1 (22.8) 246.1 (22.8) 295.3 (27.4)

Row s Deep/Fins Per Inch

3 / 16 3 / 16 3 / 16 3 / 16 3 / 16 3 / 16

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm) Fan Motor, hp (kW)

Fan & Motor RPM Fan Tip Speed, f pm (m/s) Airflow , cfm (l/s)

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa) Max. Refrigerant Press., psi (kPa)

160 (73)

Dat a

CONDENSERS, HI GH EFFI C I ENCY FI N AND TUBE T YPE

387 x 88 x 100 438 x 88 x 100

9823 x 2225 x 2545 9823 x 2225 x 2545 11123 x 2225 x 2548

CONDENSER FANS, DIRECT DRI V E PROPELL ER T YPE

AWS280ADP AWS300 ADP AW S320 ADP

281.6 (990.0) 301.0 (1058.4) 336.8 (1184.3)

BASI C DAT A

387 x 88 x 100

22485 (10199) 22485 (10199) 24441 (11086)

20832 (9449) 20832 (9449) 22788 (10337)

2968 (1346) 2968 (1346) 3256 (1477)

1236 (561) 1236 (561) 1348 (611)

477 (216) 477 (216) 477 (216)

15 15 15

COMPRESSORS, SCREW, SEMI- HERM ETIC

160 (73)160 (73)

10 12

1.4 (1.05) 1.4 (1.05) 1.4 (1.05)

10 10 10 10

850 850 850

6984 (35) 6984 (35) 6984 (35)

221700 (104630) 221700 (104630) 243870 (115093)

26 x 154 / (660 x 3900) 26 x 154 / (660 x 3900) 26 x 154 / (660 x 3900)

EVAPORA TOR, DIRECT EXPANSION SHEL L AND TUBE

267 (1011) 267 (1011) 254 (963)

10 (273) 10 (273) 10 (273) 152 (1048) 152 (1048) 152 (1048) 325 (2241) 325 (2241) 325 (2241)

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Table 23: Physical Data (60 Hz, Premium Efficiency, non-VFD models)

Weight-Add for Sound Enclosures, lbs (k

28 IM 997-4

Table 24: Physical Data (60 Hz, Premium Efficiency, non-VFD models)

CIRCUIT 1 CIRCUIT 2

BASI C DATA

Unit Cap. @ AHRI tons (kW) Unit Operating Charge lbs (kg)

310 (141) 310 (141)

Unit Dimensions L x W x H, in. (mm) Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg)

Weight-Add for Copper Fins, lbs (kg)

Weight-Add for PFCC option, lbs (kg)

COMPRESSORS, SCREW, SEMI-HERMETIC

Nominal Capacity, tons (kW)

175 (615) 175 (615)

Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters)

6 (23) 6 (23)

CONDENSERS, HIGH EFFICIENCY FIN AND TUBE TYPE

Pumpdow n Capacity, lbs (kg)

500 (227) 500 (227)

Coil Inlet Face Area, sq. ft. (sq. m.)

295.3 (27.4) 295.3 (27.4)

Row s Deep/Fins Per Inch

3 / 16 3 / 16

CONDENSER FANS, DI RECT DRI V E PROPELL ER T YPE

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm) Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, f pm (m/s) Airflow , cfm (l/s)

EVAPORATOR, DIRECT EXPA NSION SHELL A ND T UBE

Shell Dia.-Tube Length, in.(mm) Water V olume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa) Max. Refrigerant Press., psi (kPa)

160 (73)

Dat a

AWS350ADP

368 (1295)

473 x 88 x 100

(12024 x 2225 x 2548)

24140 (10950) 22487 (10200)

3553 (1612)

1460 (662)

477 (216)

12 12

1.4 (1.05)

850

6984 (35)

266040 (125556)

26 x 154 / (660 x 3900)

254 (963)

10 (273) 152 (1048) 325 (2241)

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Weight-Add for Louvered Panels, lbs (kg) Weight-Add for Sound Enclosures, lbs (k

Physical Data (non-VFD)

IM 997-4 29

Physical Data (VFD)

CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2

Unit Cap. @ A HRI tons ( kW) Unit Operating Charge lbs (kg)

145 (66) 145 (66) 165 (75) 165 (75) 165 (75) 165 (75) Unit Dimen s ions L x W x H, in. (mm)

Unit Operating Weight, lbs. (kg) Unit Shipping Weight, lbs (kg) Weight-Add f or Copper Fins Weight-Add f or Louvered Panels

Nominal Capacity, tons (kW)

90 (316) 90 (316) 90 (316) 100 (351) 100 (351) 100 (351) Minimum Capacity (% of Full Load) Oil charge per circuit , gallons (liters)

4.5 (17) 4.5 (17) 4.5 (17) 5.5 (21) 5.5 (21) 5.5 (21)

Pumpdow n Capacity, lbs (kg)

208 (94) 208 (94)

250 (113) 250 (113) 250 (113) 250 (113)

Coil Inlet Face Area, sq. ft. (sq. m.)

123.1 (11.4) 123.1 (11.4)

147.7 (13.7) 147.7 (13.7) 147.7 (13.7) 147.7 (13.7)

Row s De e p / Fins Per Inc h

3 / 16 3 / 16

3 / 16 3 / 16 3 / 16 3 / 16

Number of Fans per Circuit Fan Diameter: 31.5 in. (800 mm) Fan Motor, hp (kW) Fan & Motor RPM Fan Tip Speed, fpm (m/s) Airflow, cfm (l/s)

Shell Dia.-Tube Length, in.(mm) Water Volume, gallons (liters) Victaulic inlet/outlet conn. in. (mm) Max. Water Pressure, psi (kPa) Max. Refrigerant Press., psi (kPa)

152 (1048) 152 (1048) 152 (1048) 325 (2241) 325 (2241) 325 (2241)

67 (255) 67 (255) 63 (240)

6 (168) 6 (168) 6 (168)

EVAPORAT OR, DI RECT EXPA NS I ON SHELL AND T UBE

16 x 108 (406 x 2750) 16 x 108 (406 x 2750) 16 x 108 (406 x 2750)

6984 (35) 6984 (35) 6984 (35)

110850 (52315) 133020 (62778) 133020 (62778)

1.4 (1.05) 1.4 (1.05) 1.4 (1.05) 850 850 850

CONDENSER FA NS, DI REC T DRIV E PROPEL L ER TYPE

556666

20 20 20

CONDENSERS, HI GH EFFI C I ENC Y FI N AND TUBE TYPE

COMPRESSORS, SCREW, SEMI-HERMETIC

1776 (806) 1776 (806) 1776 (806)

676 (307) 788 (357) 788 (357)

14673 (6656) 15978 (7248) 15902 (7213) 14130 (6409) 15435 (7001) 15359 (6967)

268 x 88 x 100 268 x 88 x 100 268 x 88 x 100

(6803 x 2225 x 2548) (6803 x 2225 x 2548) (6803 x 2225 x 2548)

BASI C DA TA

154 (542) 170 (598) 185 (651)

Dat a

Care shall be exercised when welding pipe or flanges to the evaporator to prevent any slag from entering the vessel.

Note: A 20 mesh strainer shall be placed in the supply water line just prior to the inlet of the evaporator.

Physical Data (VFD)

Table 25: Physical Data (60 Hz, Standard Efficiency, VFD models)

AWS1 50ADS VFD

WS175ADS VFD AWS190ADS VFD

30 IM 997-4

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