Attachment 01 CHILLER COOLING TOWER TE01 OM MANUAL.pdf

M9-5

Bulletin 221

† Mark owned by the Cooling Technology Institute

23 65 00 2.5 ITEM NO.1 AND 2

CT-1,2 CLOSED CIRCUIT COOLING TOWER

M9-6

Unique Fan Drive System

• Power-band belts for better lateral rigidity

• Advanced design aluminum fan blades

• Non-corroding cast aluminum sheaves

• Heavy-duty fan shaft bearings with L-10 life of 75,000 - 135,000 hrs

• All other components constructed of corrosion resistant materials

• Totally enclosed fan motors assure long life

Most Accessible Basin

• Access from all four sides

• Large open area simplifies maintenance

• Basin may be inspected with pumps running

©2009 EVAPCO, Inc.

Optional Pulse~Pure®

Water Treatment System The ATWB is available with EVAPCO’s NEW optional Pulse~Pure® non-chemical water treatment system.

The Pulse~Pure® Water Treatment System utilizes pulsed-power technology to provide CHEMICAL FREE Water Treatment. EVAPCO’s Pulse~Pure® system is an environmentally responsible alternative for treating water in evaporative cooled equipment. It does not release harmful by-products to the environment and eliminates chemicals completely from cooler drift and blowdown. The Pulse~Pure® system delivers short, high-frequency bursts of low energy electromagnetic fields to the recirculating water in the ATWB and will:

• Control bacteria to levels well below traditional chemical water treatment

• Control the formation of mineral scale

• Save water by operating at higher cycles of concentration

• Yield corrosion rates equivalent to chemical water treatment

Louver Access Door

• Louver access door is available on models with 5 and 6 ft. louver sizes

• Hinged assess panel with quick release mechanism

• Allows easy access to perform routine maintenance and inspection of the makeup assembly, strainer screen and basin

NEW!

Since its founding in 1976, EVAPCO, Incorporated has become an industry leader in the engineering and manufacturing of quality heat transfer products around the world.

EVAPCO’s mission is to provide first class service and quality products for the following markets:

� Industrial Refrigeration � Commercial HVAC � Industrial Process � Power

EVAPCO’s powerful combination of financial strength and technical expertise has established the company as a recognized manufacturer of market-leading products on a worldwide basis.

EVAPCO is also recognized for the superior technology of their environmentally friendly product innovations in sound reduction and water management.

EVAPCO is an employee owned company with a strong emphasis on research & development and modern manufacturing plants. EVAPCO has earned a reputation for technological innovation and superior product quality by featuring products that are designed to offer these operating advantages:

� Higher System Efficiency � Environmentally Friendly � Lower Annual Operating Costs � Reliable, Simple Operation and

Maintenance

With an ongoing commitment to Research & Development programs, EVAPCO provides the most advanced products in the industry– Technology for the Future, Available Today!

EVAPCO products are manufactured in 17 locations in 8 countries around the world and supplied through a sales network consisting of over 170 offices.

Super Low Sound Fan

• Extremely wide sloped fan blades for sound sensitive applications.

• One piece molded heavy duty construction.

• 9-15 dB(A) sound reduction.

M9-7

WST Air Inlet Louvers (Water and Sight Tight)

• Easily removable for access

• Improved design to keep sunlight out–preventing biological growth

• Keeps water in while keeping dirt and debris out

(Patent Pending)

Efficient Drift Eliminators

• Advanced design removes mist from the leaving airstream

• Made from corrosion resistant PVC for long life

(U.S. Patent No. 6315804)

PVC Spray Distribution Header with ZM® Nozzles

• Nozzles are threaded into header at proper orientation

• Large orifice fixed position nozzles prevent clogging

• Threaded end caps for ease of cleaning

Design and Construction Features The Advanced Technology (AT) line of Closed Circuit Coolers has always reflected EVAPCO’s commitment to product development. Its advanced design and owner oriented features provide many operational and performance advantages. The new and improved ATWB offers more models and box sizes and is designed with IBC Compliant construction and CTI Certified Performance.

NEW & Improved!

noitacifitreC daoL dniW dna cimsieS s r e w o T g n i l o o C T U , T A U , S S U , T A s r e s n e d n o C e v i t a r o p a v E C T H d n a E - C T A srelooC tiucriC desolC WBTA e h t t e e M o t d e r u t c a f u n a M d n a d e n g i s e D s t i n U : f o s t n e m e r i u q e R d a o L d n i W & c i m s i e S

0005 APFN 7-ECSA 6002 CBI

: y B n o i t a c i f i t r e C t n e d n e p e d n I

A P 6 2 2 - 5 1 7 8 3 3 4 : r e b m u N l a i r e S C B I

IBC Certification Label

• Provided with every unit to indicate inde-pendent certification and compliance

Easy Field Assembly

• A new field assembly seam design which ensures easier assembly and fewer field seam leaks

• Self-guiding channels guide the coil casing section into position improving the quality of the field seam

• Eliminated up to 66% of fasteners

(Patent Pending)

NEW!

NEW!

† Mark owned by the Cooling Technology Institute

CTI Certified

NEW!

Option Featuring Thermal-Pak® XT Construction

Introducing the Premier Closed Circuit Cooler Coil in the HVAC industry! The Titan provides:

• 304L SST Construction for Superior Corrosion Resistance.

• 5 Year Extended Coil Warranty – STANDARD!!

• Patented Thermal-Pak® XT elliptical tube design with elliptical return bends and extra tough construction.

NEW!

M9-8

Efficient Drift Eliminators The ATWB is equipped with an efficient drift eliminator system that effectively reduces entrained water droplets from the air discharge to less than 0.001% of the spray water flow rate.

The eliminators are constructed of non-corrosive PVC with a multi-pass design for maximum drift reduction. They are assembled in modular sections for easy removal and access to the water distribution system.

In addition to reducing drift, the eliminators also function as effective debris screens which protect the spray system from sunlight and debris.

Belt Drive Units - 3’, 4’, 8-1/2’ and 17’ Wide Models The fan motor and drive assembly on these units are designed to allow easy servicing of the motor and adjustment of the belt tension from the exterior of the unit.

A T.E.F.C. fan motor is mounted on the outside of these models. A protective cover swings away to allow servicing and belt adjustment.

Belt Drive Units - 10’, 12’, 20’, & 24’ Wide Models The fan motor and drive assembly are designed to allow easy servicing of the motor and adjustment of the belt tension from the exterior of the unit. The T.E.A.O. fan motor is located inside the fan casing on a rugged heavy duty motor base. The innovative motor base also features a unique locking mechanism for a positive adjustment.

The motor base is designed to swing out through a very large, 14 square foot access opening. This allows for easy servicing of the motor from outside of the unit.

Air Intake

Sunlight

Splashout

Debris

Sunlight

Splashout

Debris

External Motor Mount

Motor Base Assembly

Motor Access

Superior Air Inlet Louver and Screen Design – New & Improved EVAPCO’S WST Inlet Louvers (patent pending) keep water in and sunlight out of induced draft products. The unique non-planar design is made from light-weight framed PVC sections which have no loose hardware, enabling easy unit access.

Developed with computational fluid dynamics (CFD) software, the louver’s air channels are optimized to maintain fluid dynamic and thermodynamic efficiency and block all line-of-sight paths into the basin eliminating splash-out; even when the fans are off. Additionally, algae growth is minimized by blocking all sunlight.

The combination of easy access, no splash-out and minimized algae growth saves the end user money on maintenance hours, water consumption and water treatment costs.

DE S I G N FE AT U R E S

M9-9

(4) 3 MPT

DRAIN

(4) 2 MPT

MAKE-UP

(8) 4 BFW

FLUID IN

3-5/8

25-1/4

A

H

30-3/857

112-1/2

113-1/2

20' 5/8" 36' 2-1/2"

(4) 3 MPT

OVERFLOW

(8) 4 BFW

FLUID OUT

117-3/45-1/8

E

U

23-1/4 23-1/4

ACCESS DOOR

Access Doors Swing Inside Unit

ACCESS DOOR

ACCESS DOOR ACCESS DOOR

ACCESS

DOOR

ACCESS

DOOR

ACCESS

DOOR

ACCESS

DOOR

(4) 1/2 FPT VENT (4) 1/2 FPT VENT

Note: The number of coil connections doubles when the flow rate exceeds 3,600 GPM on ATWB 20x36 models. This required option is referred to as the High Flow coil configuration.

† Model Numbers end in “-Z” for units with Series Flow piping configuration. Series Flow units may require additional coil connections and will require crossover piping. Model numbers will include “C” for units with Stainless Steel coil(s), “R” for units with Low Sound Fan(s) and “S” for units with an option that negates CTI certification.

†† Heaviest section is the coil/fan section.

* Gallons shown is water in suspension in unit and piping. Allow for additional water in bottom of remote sump to cover pump suction and strainer during operation (12” would normally be sufficient).

�� When a remote sump arrangement is selected, the spray pump, suction strainer and associated piping are omitted; the unit is provided with an oversized outlet to facilitate drainage to the remote sump.

� Unit dimensions and coil connections may vary slightly from catalog. See factory certified prints for dimensions, quantity of coil connections, and piping configuration. Coil connections are 4” bevel for weld (BFW). Other connection types such as grooved for mechanical coupling or flanged are also available as options.

Engineering Data & Dimensions

ATWB Models 20-3I36 to 20-7N36

ATWB Coil Model Heaviest Volume Gallons* Conn. Operating Coil Upper Lower Height

Number† Shipping Section†† Operating HP CFM HP GPM (Gallons) Required Size Weight (lbs) A U E H

ATWB 20-3I36 71,200 13,980 116,640 (4) 10 292,510 (4) 7.5 4,120 1,497 2,520 (4) 12" 95,660 22-1/4" 8' 3-5/8" 8' 2-1/4" 16' 5-7/8" ATWB 20-3J36 71,720 14,110 117,160 (4) 15 334,840 (4) 7.5 4,120 1,497 2,520 (4) 12" 96,180 22-1/4" 8' 3-5/8" 8' 2-1/4" 16' 5-7/8" ATWB 20-3K36 71,960 14,170 117,400 (4) 20 368,530 (4) 7.5 4,120 1,497 2,520 (4) 12" 96,420 22-1/4" 8' 3-5/8" 8' 2-1/4" 16' 5-7/8" ATWB 20-3L36 72,080 14,200 117,520 (4) 25 396,990 (4) 7.5 4,120 1,497 2,520 (4) 12" 96,540 22-1/4" 8' 3-5/8" 8' 2-1/4" 16' 5-7/8" ATWB 20-3M36 72,280 14,250 117,720 (4) 30 418,120 (4) 7.5 4,120 1,497 2,520 (4) 12" 96,740 22-1/4" 8' 3-5/8" 8' 2-1/4" 16' 5-7/8" ATWB 20-3N36 72,920 14,410 118,360 (4) 40 453,190 (4) 7.5 4,120 1,497 2,520 (4) 12" 97,380 22-1/4" 8' 3-5/8" 8' 2-1/4" 16' 5-7/8" ATWB 20-4I36 82,360 16,770 131,760 (4) 10 283,990 (4) 7.5 4,120 1,974 2,520 (4) 12" 110,780 30-3/4" 9' 1/8" 8' 2-1/4" 17' 2-3/8" ATWB 20-4J36 82,880 16,900 132,280 (4) 15 325,090 (4) 7.5 4,120 1,974 2,520 (4) 12" 111,300 30-3/4" 9' 1/8" 8' 2-1/4" 17' 2-3/8" ATWB 20-4K36 83,120 16,960 132,520 (4) 20 357,800 (4) 7.5 4,120 1,974 2,520 (4) 12" 111,540 30-3/4" 9' 1/8" 8' 2-1/4" 17' 2-3/8" ATWB 20-4L36 83,240 16,990 132,640 (4) 25 385,430 (4) 7.5 4,120 1,974 2,520 (4) 12" 111,660 30-3/4" 9' 1/8" 8' 2-1/4" 17' 2-3/8" ATWB 20-4M36 83,440 17,040 132,840 (4) 30 405,940 (4) 7.5 4,120 1,974 2,520 (4) 12" 111,860 30-3/4" 9' 1/8" 8' 2-1/4" 17' 2-3/8" ATWB 20-4N36 84,080 17,200 133,480 (4) 40 439,990 (4) 7.5 4,120 1,974 2,520 (4) 12" 112,500 30-3/4" 9' 1/8" 8' 2-1/4" 17' 2-3/8" ATWB 20-5I36 93,200 19,480 146,600 (4) 10 275,470 (4) 7.5 4,120 2,451 2,520 (4) 12" 125,620 39-1/4" 9' 8-5/8" 8' 2-1/4" 17' 10-7/8" ATWB 20-5J36 93,720 19,610 147,120 (4) 15 315,330 (4) 7.5 4,120 2,451 2,520 (4) 12" 126,140 39-1/4" 9' 8-5/8" 8' 2-1/4" 17' 10-7/8" ATWB 20-5K36 93,960 19,670 147,360 (4) 20 347,070 (4) 7.5 4,120 2,451 2,520 (4) 12" 126,380 39-1/4" 9' 8-5/8" 8' 2-1/4" 17' 10-7/8" ATWB 20-5L36 94,080 19,700 147,480 (4) 25 373,860 (4) 7.5 4,120 2,451 2,520 (4) 12" 126,500 39-1/4" 9' 8-5/8" 8' 2-1/4" 17' 10-7/8" ATWB 20-5M36 94,280 19,750 147,680 (4) 30 393,760 (4) 7.5 4,120 2,451 2,520 (4) 12" 126,700 39-1/4" 9' 8-5/8" 8' 2-1/4" 17' 10-7/8" ATWB 20-5N36 94,920 19,910 148,320 (4) 40 426,790 (4) 7.5 4,120 2,451 2,520 (4) 12" 127,340 39-1/4" 9' 8-5/8" 8' 2-1/4" 17' 10-7/8" ATWB 20-6I36 104,640 22,340 162,000 (4) 10 266,950 (4) 7.5 4,120 2,928 2,520 (4) 12" 141,020 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-6J36 105,160 22,470 162,520 (4) 15 305,580 (4) 7.5 4,120 2,928 2,520 (4) 12" 141,540 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-6K36 105,400 22,530 162,760 (4) 20 336,330 (4) 7.5 4,120 2,928 2,520 (4) 12" 141,780 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-6L36 105,520 22,560 162,880 (4) 25 362,300 (4) 7.5 4,120 2,928 2,520 (4) 12" 141,900 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-6M36 105,720 22,610 163,080 (4) 30 381,580 (4) 7.5 4,120 2,928 2,520 (4) 12" 142,100 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-6N36 106,360 22,770 163,720 (4) 40 413,590 (4) 7.5 4,120 2,928 2,520 (4) 12" 142,740 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-7I36 118,080 25,700 179,440 (4) 10 258,430 (4) 7.5 4,120 3,405 2,520 (4) 12" 158,460 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-7J36 118,600 25,830 179,960 (4) 15 295,830 (4) 7.5 4,120 3,405 2,520 (4) 12" 158,980 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-7K36 118,840 25,890 180,200 (4) 20 325,600 (4) 7.5 4,120 3,405 2,520 (4) 12" 159,220 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-7L36 118,960 25,920 180,320 (4) 25 350,740 (4) 7.5 4,120 3,405 2,520 (4) 12" 159,340 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-7M36 119,160 25,970 180,520 (4) 30 369,400 (4) 7.5 4,120 3,405 2,520 (4) 12" 159,540 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8" ATWB 20-7N36 119,800 26,130 181,160 (4) 40 400,390 (4) 7.5 4,120 3,405 2,520 (4) 12" 160,180 47-3/4" 10' 5-1/8" 8' 2-1/4" 18' 7-3/8"

Weights (lbs) Fans Spray Pump Remote Sump �� Dimensions �

ATWB 20-5K36 93,960 19,670 147,360 (4) 7.5 4,120(4) 20 347,070 2,451 2,520 (4) 12" 126,380 39-1/4" 9' 8-5/8" 8' 2-1/4" 17' 10-7/8"

M9-10

PROJECT : Simulation Center

CT No. CT-1 ~ 2

Capacity KW 2,110

Temp( ) 34.5 / 29.5 / 25

Type Induced Counter Flow

Model No. ATWB 20-5K36-SRC

Q'ty EA 2

Capacity (Each) KW 2,558

Capacity (Total) KW 5,116

Flow rate(each) LPM 6,495

In / Out Temp 34.5 / 29.5

Wet Bulb 25.0

Power V / P / Hz 460 / 3 / 50

Type Induced Counter Flow

Casing H.D.G STEEL(Z 725)

Eliminator PVC

Type AXIAL PROPELLER

Air flow CMS 164

Material AL.ALLOY

Fan motor kW 60 ( 4 x 15 )

Type Closed-coupled, Centrifugal

Motor kW 22 (4 x 5.5)

Spray Water Flow LPS 259.9

Basin Heater kW 60 (4 x 15)

Material kPa 304 Stainless Steel

Coil Pressure Drop kPa 18.9

Pressure Test psig 400

IN / OUT ANSI 8 x 100(4") / 8 x 100(4")

Make-up/Drain/Over ANSI 4 x 50(2") / 4 x 80(3") / 4 x 80(3")

Dimension L x W x H(mm) 11,036 x 6,112 x 5,458

Shipping Weight kg 42,620

Oper.Weight kg 66,842

Heaviest Section kg 8,922

Drift Loss % 0.001% at Flow rate

Evaporated Water Rate LPS 0.78

External Service Platform with Ladder

Motor davit with Base

Flange Inlet and Outlet Connections

2"Spring mount

El.Hearter Package(Heater,Thermostat,Low Water Cut/Off Switch)

3-Probe Electronic Water Level Control Package

CTI Certification

IBC Compliant (Seismic Design Force 1g)

Closed Circuit Cooler Data Sheet

Selection Criteria

Model

Type

Material

Fan

Pipe

Water Recirculation

Pump

Heat Transfer Coils

Dimension

Weight

Loss rate

Options

(Included in quotation)

M9-11

M9-12

M9-13

M9-14

M9-15

M9-16

M9-17

M9-18

M9-19

M9-20

M9-21

M9-22

M9-23

M9-24

M9-25

M9-26

M9-27

M9-28

M9-29

M9-30

M9-31

M9-32

M9-33

M9-34

M9-35

M9-36

M9-37

M9-38

M9-39

M9-40

M9-41

M9-42

M9-43

M9-44

M9-45

M9-46

M9-47

M9-48

M9-49

M9-50

M9-51

M9-52

M9-53

M9-54

M9-55

M9-56

M9-57

M9-58

M9-59

M9-60

M9-61

M9-62

M9-63

M9-64

M9-65

M9-66

M9-67

M7-5

Seoul Air Conditioning Inc

Project Simulation Center, USAG Humphreys, Korea Date Feb/14/2014

For Approval

For Information

Item Magnetic Bearing Centrifugal Chiller For Notice For Confirmation

Print For Reply 2-1. Specification For Review

23 64 10 - #1.2 WC WATER CHILLER

M7-6

M7-7

SECTION 15XXX: FRICTIONLESS CENTRIFUGAL CHILLERS

PART 1 - GENERAL

1.1 SUMMARY

1.2 REFERENCES

1.3 SUBMITTALS

1.4 QUALITY ASSURANCE

M7-8

1.5 DELIVERY AND HANDLING

1.6 WARRANTY

M7-9

1.7 MAINTENANCE

PART 2 - PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS

2.2 UNIT DESCRIPTION

M7-10

2.3 DESIGN REQUIREMENTS

M7-11

2.4 CHILLER COMPONENTS

M7-12

M7-13

M7-14

M7-15

2.5. OPTIONAL ITEMS

PART 3 - EXECUTION

3.1 INSTALLATION

M7-16

Date Feb/14/2014

For Approval

For Information

Item Magnetic Bearing Centrifugal Chiller For Notice For Confirmation

Print For Reply 2-2. Technical Data Sheet For Review

M7-17

MAGNITUDE™Water Cooled Centrifugal Chiller

Job Information Technical Data Sheet Job Name Simmulation Center Date 2/18/2014 Submitted By YH Yoo Software Version 09.10 Unit Tag Centrif 003 Unit FPA# AUTO_40

Unit Overview

Model Number Capacity kW

NPLV

COP

Voltage Drive Type LEED EA Credit 4

WME0500S 1690.0 11.008 460 V / 60 Hz VFD/UM Pass

Unit Model Number: WME0500SSM2R

Approval: ETL / cETL only Vessel Code: ASME

Compressor Quantity Capacity Control Refrigerant Type Refrigerant Weight 1 VFD / Inlet Guide Vanes R134a 495 kg

Evaporator

Entering Fluid Temperature Leaving Fluid Temperature Fluid Type Actual Fluid Flow Minimum Fluid Flow

15.00 °C 7.00 °C Water 50.53 l/s 19.8 l/s

Length Diameter Number of Passes

Tube Fouling Factor Material Wall Thickness

3.7 m 76.2 cm 2 Copper 0.635 mm 0.01761 °C.m²/kW

Condenser

Entering Fluid Temperature Leaving Fluid Temperature Fluid Type Glycol Concentration Fluid Flow

29.50 °C 34.50 °C Propylene Glycol 30 % 98.10 l/s

Length Diameter Number of Passes

Tube Fouling Factor Material Wall Thickness

3.7 m 66.0 cm 2 Copper 0.635 mm 0.04403 °C.m²/kW

Unit Performance Design

Capacity kW

Input kW

Efficiency

COP

RLA

A

NPLV

COP

Part Load Efficiency Evaporator Fluid Condenser Fluid 75%

COP

50%

COP

25%

COP

Pressure Drop kPa

Entering Temperature

°C

Pressure Drop kPa

Leaving Temperature

°C

1690.0 264.9 6.381 370 11.008 8.787 12.968 11.765 27.5 15.00 32.2 34.50

Performance Points Rated at AHRI Condenser Relief

Point # % of Design Load

Capacity kW

Input kW

Efficiency

COP

RLA

A

Evaporator Fluid Condenser Fluid Flow l/s

Temperature Pressure Drop kPa

Flow l/s

Temperature Pressure Drop kPa

Entering °C

Leaving °C

Entering °C

Leaving °C

1 100.0 1,690.0 264.9 6.381 370 50.53 15.00 7.00 27.5 98.10 29.50 34.50 32.2 2 90.0 1,521.0 211.4 7.195 301 50.53 14.20 7.00 27.4 98.10 27.27 31.70 31.5 3 80.0 1,352.0 165.0 8.197 240 50.53 13.40 7.00 27.4 98.10 25.03 28.91 30.6 4 70.0 1,183.0 123.5 9.576 190 50.53 12.60 7.00 27.4 98.10 22.80 26.15 29.6 5 60.0 1,014.0 90.0 11.269 143 50.53 11.80 7.00 27.4 98.10 20.57 23.41 28.6 6 50.0 845.0 65.2 12.968 106 50.53 11.00 7.00 27.3 98.10 18.33 20.69 27.3 7 40.0 676.0 53.4 12.670 88 50.53 10.20 7.00 27.3 98.10 18.33 20.23 27.2 8 30.0 507.0 41.7 12.168 70 50.53 9.40 7.00 27.3 98.10 18.33 19.77 27.1 9 20.0 338.0 34.3 9.848 59 50.53 8.60 7.00 27.2 98.10 18.33 19.31 27.0 10 10.0 169.0 22.9 7.397 42 50.53 7.80 7.00 27.2 98.10 18.33 18.84 26.8

M7-18

MAGNITUDE™Water Cooled Centrifugal Chiller

Physical Evaporator

Inlet Location Header Type Header Material Tube Sheet Material Design Pressure (Waterside)

Right Flanged Carbon Steel Carbon Steel 1 MPa

Condenser

Inlet Location Header Type Header Material Tube Sheet Material Design Pressure (Waterside)

Right Flanged Carbon Steel Carbon Steel 1 MPa

Electrical Voltage RLA LRA Power

Connection Power Factor MCA MOCP

460 V / 60 Hz / 3 Phase 364 A 401 A Single Point 0.90 458 A 640 A

Drive Type Model Location Harmonic Distortion Enclosure Type Motor Protection

VFD Integral Unit Mounted Standard Nema 1 Standard Circuit Breaker Short Circuit Current Rating Approval

35 KAIC 35 kA ETL, ETLc

Sound (with Insulation) Sound Pressure

63 Hz 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz 8 kHz Overall 75% Load 50% Load 25% Load

41.0 58.0 67.0 72.0 73.0 71.0 83.0 71.0 84.5 79.6 78.6 80.4 Sound Pressure (dB) measured in accordance with ANSI/AHRI Standard 575 2008 (‘A’ weighted)

Options Basic Unit

Packaging: Bagging only Insulation

Thermal: 3/4" on evap shell, cold surfaces and connection & return heads Control

Communication Protocol: LonMark Drive

Ground Fault Protection: Included Power Meter: Amps, Volts, Power Factor and Input Power

AHRI Certification

Certified in accordance with the AHRI Water Cooled Water Chilling Packages Using Vapor Compression Cycle Certification Program, which is based on AHRI Standard 550/590 (I P) Certified units may be found in the AHRI Directory at www.ahridirectory.org.

M7-19

Date Feb/14/2014

For Approval

For Information

Item Magnetic Bearing Centrifugal Chiller For Notice For Confirmation

Print For Reply 2-3. Chiller Overview Drawing For Review

M7-20

M7-21 pad size+100+100 pad size+100+100

M7-22

M7-23

Certified Drawing CD: WME Field Wiring

Group: Chiller Type: WME Date: March 2010

©2010 McQuay International Page 1 of 1

Figure 1: Magnitude WME Field Wiring Diagram

Electrical Notes

1. Units are available for 60Hz, 460 or 440 to 480V.

2. Wiring, fuse and wire size must be in accordance with the

National Electric Code (NEC).

3. Important: Voltage unbalance not to exceed 2% with a resultant current unbalance of 6 to 10 times the voltage unbalance per NEMA MG-1, 1998 Standard. This is an important restriction that must be adhered to.

Power Wiring Use only copper supply wires with ampacity based on 75°C conductor rating. (Exception: for equipment rated over 2000 volts, 90°C or 105°C rated conductors should be used). Connections to terminals must be made with copper lugs and copper wire.

Short Circuit Current Ratings The standard short circuit rating is 35kA for 460 V. Optional high short circuit current ratings are available for 65kA, and 100kA with a matching circuit breaker.

The optional circuit breaker must be sized to meet these ratings.

Notes for field wiring diagram

1. All line-side wiring must be in accordance with the NEC and be made with copper wire and copper lugs only. Power wiring connection is in the VFD panel located at the rear of the unit.

2. Minimum control wire size for 115 VAC is 12 ga. for a maximum length of 50 feet. If greater than 50 feet, contact your McQuay representative for recommended wire size minimum.

Wire size for 24 VAC is 18 ga. All wiring to be installed as NEC Class 1 wiring system. All 24 VAC wiring must be run in separate conduit from 115 VAC wiring. Wiring must be wired in accordance with NEC and connection to be made with copper wire and copper lugs only.

3. Voltage unbalance not to exceed 2% with a resultant current unbalance of 6 to 10 times the voltage unbalance per NEMA MG-1, 1998 Standard. Voltage variation is +/- 10% of nameplate voltage.

4. A customer furnished 24 or 240 Vac power for alarm relay coil may be connected at J18. The alarm is operator programmable. Maximum rating of the alarm relay coil is 25

VA.

5. Remote on/off control of unit can be accomplished by installing a set of dry contacts at J25.

6. If field supplied pressure differential flow switches are used, they must be installed across the vessel and not the pump.

They must be suitable for 24vac and low current application.

7. Optional customer supplied 25 VA maximum coil rated, chilled water pump relay may be wired as shown. This option will cycle the chilled water pump in response to chiller demand.

8. The condenser water pump must cycle with the unit. A customer supplied 25 VA maximum coil rated, condenser water pump relay must be wired as shown. Units with free-cooling must have condenser water above 50°F before starting.

9. Optional customer supplied 25 VA maximum coil rated cooling tower fan relays may be wired as shown. This option will cycle the cooling tower fans in order to maintain unit head pressure.

10. 4-20 mA external signal for chilled water reset are wired to J23;

demand limit is wired to J26.

M7-24

4 IM 1033-4

Introduction IntroductionFigure 1: Required Lifting Arrangement

General Description Daikin McQuay Magnitude model WME frictionless centrifugal chillers are complete, self-contained, automatically controlled fluid chilling units. Each unit is completely assembled and factory tested before shipment. Model WME is cooling-only.

Each Magnitude Model WME unit features one compressor connected to a condenser and evaporator. The chillers use refrigerant R-134a to reduce the size and weight of the package compared to negative pressure refrigerants and since R-134a operates at a positive pressure over the entire operation range, no purge system is required. The controls are pre-wired, adjusted and tested. Only normal field connections such as piping, electrical and interlocks, etc. are required, thereby simplifying installation and increasing reliability. Most necessary equipment protections and operating controls are factory-installed in the control panel.

The chillers are designed for indoor, non-freezing locations. If indoor freezing temperatures are possible, special procedures described in this manual must be followed to drain the unit.

Outdoor locations require a special weatherproof design. For WME chillers selected with optional Retrofit Knockdown, refer to IM Knockdown, available on www.daikinmcquay.com for detailed dimensions and installation instructions.

Application The procedures presented in this manual apply to standard Model WME chillers. Refer to the Operating Manual, OMM 1034 for detailed information about chiller operation and the MicroTech-E unit controller.

All Daikin McQuay centrifugal chillers are factory tested prior to shipment and must be initially started at the job site by a factory trained McQuay service technician. Failure to follow this startup procedure can affect the equipment warranty.

The standard limited warranty on this equipment covers parts that prove defective in material or workmanship. Specific details of this warranty can be found in the warranty statement furnished with the equipment.

Figure 2: Nomenclature

Li fting Points

Lifting Point

Lifting Point (Outside Corner Hidden)

VFD Power Panel

Power Cable Entry

Note: This drawing is for general reference only. Refer to dimension drawings for actual location of components.

On some units the control panel and interface panel may be on the opposite side, adjacent to the VFD power panel.

W M E 0500

Water-cooled Magnetic Bearing Vintage

Chiller Model

M7-25

IM 1033-4 13

Electrical Data Electrical Data

Electrical

Power Wiring Wiring, fuse and wire size must be in accordance with the National Electric Code (NEC).

Important: Voltage unbalance not to exceed 2% with a resultant current unbalance of 6 to 10 times the voltage unbalance per NEMA MG-1, 1998 Standard. This is an important restriction that must be adhered to.

Power entrance is on top of the enclosure. Remove cover plate when making hole to avoid entrance of foreign material into the enclosure.

Power connection lug size range is 3/0 AWG - 500kcmil, three conductors per phase

The ground connection is a stand-off adjacent to the circuit breaker, marked "MGND". Field provide a 3/8-16 x ¾ in.

screw with a flat washer and lock washer and appropriate "O" terminal.

Use only copper supply wires with ampacity based on 75°C conductor rating. (Exception: for equipment rated over 2000 volts, 90°C or 105°C rated conductors should be used).

The VFD nameplate will indicate the RLA setting required in the MicroTech-E controller. The RLA setting is for the VFD output amps not the input amps. Follow name plate values for output RLA.

Power Factor Correction Capacitors Do not use power factor correction capacitors with WME chillers. They can cause harmful electrical resonance in the system. Correction capacitors are not necessary since VFDs inherently maintain high power factors.

Control Wiring The control circuit power on Magnitude model WME chillers is supplied by the unit-mounted VFD.

Figure 10: Unit Control Panel

CAUTION

Qualified and licensed electricians must perform wiring.

Shock hazard exists.

CAUTION

Connections to terminals must be made with copper lugs and copper wire.

M7-26

Operation & Maintenance Manual OMM 1034-4

Group: Chiller

Part Number: 331499501 Effective: November 2012

Supersedes: July 2012

Magnitude Magnetic Bearing Centrifugal Chillers Model WME 0500 - 700

Software Version: 4.33.1

M7-27

2 OMM 1034-4

Table of Contents Introduction

Features of the Control Panel

General Description

Component Description Operator Interface Touch Screen Unit Controller Motor/Compressor Controller VFD Controller VFD Description:

Key VFD Control Signals Inputs and Outputs

Optional Harmonic Filters

Field Wiring Data

Operator Interface Touch Screen (OITS)19 Navigation SET Screens Service Screens Downloading Data Chiller Alarms Trend Screens

Operating the Chiller Interface Panel On/Off Start/Stop Unit Changing Setpoints

Sequence of Operation

Troubleshooting Operation with Failed OITS

Maintenance External Sensors and Valve Locations Routine Maintenance Annual Shutdown Annual Startup Repair of System

Maintenance Schedule

Service Programs

Operator Training

Warranty Statement

Recognize Safety Symbols, Words, and Labels The following symbols and labels indicate immediate or potential hazards. Read and comply with all safety information and instructions accompanying these symbols. Failure to heed safety information increases the risk of property and/or product damage, serious injury or death. Improper installation, operation and maintenance can void the warranty.

CAUTION

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

WARNING

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

DANGER

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

© 201 . Illustrations and data cover the 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; Modbus from Schneider Electric; Victaulic from Victaulic Company; Magnitude, Energy Analyze, MicroTech E, Open Choices from .

M7-28

OMM 1034-4 3

Introduction This manual provides operating, maintenance and troubleshooting information for the Magnitude frictionless centrifugal chiller with magnetic bearing compressor, Model WME, with MicroTech® E control.

! WARNING

Electric shock hazard. Can cause personal injury or equipment damage. This equipment must be properly grounded. Connections to and service of the MicroTech control panel must be performed only by personnel that are knowledgeable in the operation of the equipment being controlled.

! CAUTION

Static sensitive components. A static discharge while handling electronic circuit boards can damage components. Discharge any static electrical charge by touching the bare metal inside the control panel before performing any service work. Never unplug any cables, circuit board terminal blocks, or power plugs while power is applied to the panel.

! CAUTION

Do not install any software not authorized by or alter operating systems in any unit microprocessor, including the interface panel. Doing so can cause malfunction of the control system and possible equipment damage.

NOTICE

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with this instruction manual, may cause interference to radio communications. Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at their expense. disclaims any liability resulting from any interference or for the correction thereof.

Equipment Location WME chillers are intended only for installation in an indoor or weather protected area consistent with the NEMA 1 rating on the chiller, controls, and electrical panels. Equipment room temperature for operating and standby conditions is 40°F to 104°F (4.4°C to 40°C).

M7-29

4 OMM 1034-4

Optimum Water Temperatures and Flow A key to improving energy efficiency for any chiller is minimizing the compressor pressure lift. Reducing the lift reduces the compressor work and its energy consumption per unit of output. The chiller typically consumes more energy than any other component in the chiller system. Therefore, the optimum plant design must take into account all of the interactions between chiller, pumps, and tower.

Higher Leaving Chilled Water Temperatures Warmer leaving chilled water temperatures will raise the compressor's suction pressure and decrease the lift, improving efficiency. Using 45°F (7°C) leaving water instead of 42°F (5.5°C) will significantly reduce chiller energy consumption.

Evaporator Temperature Drop The industry standard has been a 10°F (5.5°C) temperature drop in the evaporator. Increasing the drop to 12°F or 14°F (6.6°C or 7.7°C) can improve chiller efficiency. Chilled water pump energy will also be reduced.

Reduced Evaporator Fluid Flow Several popular chiller plant control practices including Variable Primary Flow systems advocate reducing the evaporator fluid flow rate as the chiller capacity is reduced. This practice can significantly reduce the evaporator pumping power while having little effect on chiller energy consumption. The Magnitude chiller can operate effectively in variable evaporator flow systems as long as the minimum and maximum tube velocities are taken into consideration when selecting the chiller. See section on Variable Fluid Flow Rates on page 7.

Condenser Entering Water Temperature As a general rule, a 1°F (0.5°C) drop in condenser entering water temperature will reduce chiller energy consumption by two percent. Cooler water lowers the condensing pressure and reduces compressor work. One or two degrees can make a noticeable difference. The incremental cost of a larger tower can be small and provide a good return on investment.

Condenser Water Temperature Rise The industry standard of 3 gpm/ton or about a 9.5°F (5.3°C) delta-T works well for most applications.

Reduced Condenser Fluid Flow Several popular chiller plant control practices also advocate reducing the condenser fluid flow rate as the chiller load is reduced. This practice can significantly reduce the condenser pumping power, but it may also have the unintended consequence of significantly increasing compressor power since the leaving condenser water temperature is directly related to compressor lift and power. The higher compressor power will typically be larger than the condenser pumping power reduction and will result in a net increase in chiller plant energy consumption. Therefore, before this strategy is applied for energy saving purposes it should be extensively modeled or used in an adaptive chiller plant control system which will take into account all of the interdependent variables affecting chiller plant energy. If it is decided to use variable condenser fluid flow, the Magnitude chiller can operate effectively as long as the minimum and maximum tube velocities are taken into consideration when selecting the chiller.

Free-Cooling Pressure Inversion Pressure inversion can happen in the chiller when the building system uses free cooling. The chiller had been in the OFF state with no water flowing so the pressure inside was relatively high and corresponds to the water temperatures inside the heat exchangers. When the condenser pumps starts with cold water from the free-cooling system, the sudden drop in condenser temperature creates an inverted pressure situation. The refrigerant inside the heat exchangers flows to equalize the pressure. During this process, there can be enough pressure difference to cause refrigerant flow and impeller rotation for a short time. As long as power to the chiller is on, the WME software recognizes this condition and will levitate the bearings until the pressure equalizes. Once the pressure equalizes, the chiller will operate as normal.

M7-30

OMM 1034-4 5

Chilled Water Temperature The maximum temperature of water entering the chiller on standby must not exceed 105°F (46.1°C). Maximum temperature entering on start-up must not exceed 90°F (32°C). Minimum chilled water leaving temperature without antifreeze is approximately 38°F (3.3°C).

Piping Piping must be adequately supported to remove weight and strain on the chiller's fittings and connections. Be sure piping is adequately insulated for job conditions. Install a cleanable 20-mesh water strainer upstream of the evaporator and condenser. Install enough shutoff valves to permit draining water from the evaporator or condenser without draining the complete system.

Condenser Water Temperature When the ambient wet bulb temperature is lower than design, the entering condenser water temperature of Magnitude model WME chillers can be lowered to improve chiller performance.

Chillers can start with entering condenser water temperatures as low as 40°F (4.4°C). For short periods of time during startup, the entering condenser water temperature can even be lower than the leaving chilled water temperature.

Magnitude model WME chillers are equipped with electronic expansion valves (EXV) and will run with entering condenser water temperatures as low as shown in Figure 1 or as calculated from the following equation on which the curves are based:

Min. ECWT = 5.25+(LWT)-0.75*DTFL*(PLD/100)+14 *(PLD/100)2

Where:

ECWT = Entering condenser water temperature LWT = Leaving chilled water temperature DTFL = Chilled Water Delta-T at full load PLD = The percent chiller load point to be checked

Figure 1: Model WME Minimum Entering Condenser Water Temperature (EXV) (10°F Range at Full Load)

0 10 20 30 40 50 60 70 80 90 100 Percent Load

ECWT (°F) 46°F LChWT 44°F LChWT 42°F LChWT

For example; at 44°F LWT, 10°F Delta-T at full load, and 50% full load operation, the entering condenser water temperature could be as low as 49°F. This provides excellent operation with water-side economizer systems.

M7-31

6 OMM 1034-4

Depending on local climatic conditions, using the lowest possible entering condenser water temperature may be more costly in total system power consumed than the expected savings in chiller power would suggest, due to the excessive fan power required.

In this scenario, cooling tower fans would continue to operate at 100% capacity at low wet bulb temperatures. The trade-off between better chiller efficiency and fan power should be analyzed for best overall system efficiency. Daikin

Energy Analyzer™ program can optimize the chiller/tower operation for specific buildings in specific locales.

Even with tower fan control, some form of water flow control, such as tower bypass, is recommended.

Figure 2 and Figure 3 illustrate two temperature-actuated tower bypass arrangements. The “Cold Weather” scheme, Figure 3, provides better startup under cold ambient air temperature conditions. The bypass valve and piping are indoors and thus warmer, allowing for warmer water to be immediately available to the condenser. The check valve may be required to prevent air at the pump inlet.

Figure 2: Tower Bypass: Mild Weather Operation

Figure 3: Tower Bypass: Cold Weather Operation (Bypass Indoors)

Condenser water temperature control The standard MicroTech controller is capable of three stages of tower fan control plus an analog control of either a three-way tower-bypass valve or variable speed tower-fan motor. Stages are controlled from condenser-water temperature. The three-way valve can be controlled to a different water temperature or track the current tower stage.

This allows optimum chilled water plant performance based upon specific job requirements.

Pumps The condenser water pump(s) must be cycled off when the last chiller of the system cycles off. This will keep cold condenser water from migrating refrigerant to the condenser. Cold liquid refrigerant in the condenser can make start up difficult. In addition, turning off the condenser water pump(s) when the chillers are not operating will conserve energy.

M7-32

OMM 1034-4 7

Include thermometers and pressure gauges at the chiller inlet and outlet connections and install air vents at the high points of piping. Where noise and vibration are critical and the unit is mounted on spring isolators, flexible piping and conduit connections are necessary.

Variable Fluid Flow Rates and Tube Velocities Many chiller system control and energy optimization strategies require significant changes in evaporator and condenser water flow rates. The Magnitude chiller line is particularly well suited to take full advantage of these energy saving opportunities provided that the maximum and minimum fluid flow rates are taken into consideration for a specific application. The sales engineer has the flexibility to use different combinations of shell size, number of tubes, and pass arrangements to select the optimum chiller for each specific application.

Both excessively high or excessively low fluid flow rates should be avoided. Excessively high fluid flow rates and correspondingly high tube velocities will result in high fluid pressure drops, high pumping power, and potentially tube corrosion and/or tube erosion damage. Excessively low fluid flow rates and correspondingly low velocities should also be avoided as they will result in poor heat transfer, high compressor power, sedimentation and tube fouling. Excessively high and low tube velocities can be particularly problematic and damaging in open loop systems.

Rates of Fluid Flow Change If it is decided to vary the evaporator water flow rate the rate of change should not exceed 50% per minute and should not exceed the minimum or maximum velocity limits as determined by the chiller software program.

Vibration Mounting The Magnitude chillers are almost vibration-free. Consequently, floor mounted spring isolators are not usually required.

Rubber mounting pads are shipped with each unit. It is wise to continue to use piping flexible connectors to reduce sound transmitted into the pipe and to allow for expansion and contraction.

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.

Multi-chiller Up to eight WME chillers are capable of being interconnected and operating in a multi chiller mode using their internal control network. Please contact Service for installation of the correct software for multi-chiller operation.

System Analysis Although we recommend analyzing the entire system, it is generally effective to place the chiller in the most efficient mode because it is a large energy consumer.

The Energy Analyzer program is an excellent tool to investigate the entire system efficiency, quickly and accurately. It is especially good at comparing different system types and operating parameters. Contact your local sales office for assistance on your particular application.

M7-33

8 OMM 1034-4

Features of the Control Panel

Control of leaving chilled water within a 0.5°F ( 0.3°C) tolerance. Systems with a large water volume and relatively slow load changes can achieve higher stability.

Readout of the following temperature and pressure readings:

Entering and leaving chilled water temperature Entering and leaving condenser water temperature Saturated evaporator refrigerant temperature and pressure Saturated condenser temperature and pressure Suction line, liquid line and discharge line temperatures - calculated superheat for discharge and suction lines – calculated sub-cooling for liquid line

Automatic control of primary and standby evaporator and condenser pumps.

Control up to 3 stages of cooling tower fans plus modulating bypass valve and/or tower fan VFD.

The controller will store and display key historic operating data for recall in a graphic format on the screen. Data can also be exported for archival purposes via a USB port.

Security password protection against unauthorized changing of setpoints and other control parameters.

Warning and fault diagnostics to inform operators of warning and fault conditions in plain language. Al1 warnings, problems and faults are time and date stamped so there is no guessing of when the fault condition occurred.

Eight latest faults are displayed on the touch screen. Data can be exported for archival purposes via a USB Drive.

Soft loading feature reduces electrical consumption and peak demand charges during the cooling loop pull-down.

Adjustable load pull-down rate reduces over-shoot during initial loop pull-down.

Remote input signals for chilled water reset, demand limiting, unit enable.

Manual (Service) control mode allows the service technician to command the unit to different operating states.

Useful for system checkout.

Optional Building Automation System communication capability via LONMARK , Modbus or BACnet standard protocols for BAS manufacturers.

Pressure transducers for direct reading of system pressures. Preemptive control of high motor amps, high motor temperature, low evaporator pressure conditions and high discharge temperature takes corrective action prior to a fault trip.

M7-34

OMM 1034-4 9

General Description General Description The centrifugal MicroTech-E control system consists of microprocessor-based controllers that provide all monitoring and control functions required for the controlled, efficient operation of the chiller. The system consists of the following components:

Operator Interface Touch Screen (OITS), one per chiller, provides unit information and is the primary user interface for all system data and setpoint information.

Unit Controller, one per chiller, controls unit functions and communicates with all other controllers. It is located in a panel adjacent to the OITS.

Compressor Controller located in the compressor controls compressor functions such as loading and unloading and collects I/O points near the compressor,.

The operator can monitor all operating conditions by using the unit-mounted OITS. In addition to providing all normal operating controls, the MicroTech-E control system monitors equipment protection devices on the unit and will take corrective action if the chiller is operating outside of its normal design conditions. If a fault condition develops, the controller will shut the compressor or entire unit down and activate an alarm output.

Important operating conditions at the time an alarm condition occurs are retained in the controller’s history log to aid in troubleshooting and fault analysis.

The system is protected by a password scheme that only allows access by authorized personnel. The operator must enter the password into the touch screen before any setpoints can be altered.

Control Architecture Figure 4, Major Control Components

Chiller Controller

Compressor Controller

Variable Frequency

Drive

BAS

(BACnet, Modbus, LONTALK)

Ethernet/RS232/RS485/LON

Ethernet

Chiller #2

Color [Type a quote from the

BAS

Card

Fire-wallLocal User Interface

Ethernet (Local Network)

Ethernet (Local Network)

VGA

RS232

12VDC

Chiller #1

M7-35

10 OMM 1034-4

Component Description Operator Interface Touch Screen The operator interface touch screen (OITS) is the primary device by which commands and entries into the control system are made (a laptop computer can also be used). It also displays all controller data and information on a series of graphic screens.

The control panel contains a USB port that can be used for loading information to and from the control system including download of trend log data and uploading software upgrades.

The OITS panel is mounted on a moveable arm to allow placement in a convenient position for the operator. There is a screen-saver programmed into the system. The screen is reactivated by touching it anywhere on the front surface.

Unit Controller There is one unit controller mounted on the chiller which is the primary interface to the user and for field I/O connections.

Unit and compressor on/off switches are mounted in the unit controller panel located adjacent to the OITS panel. They are designated 1 for on and O for off. The compressor on/off switch should only be used when an immediate stop is required since the normal shut down sequence is bypassed.

There is a unit enable switch located on the left outside of the panel that causes a controlled shutdown of the compressor.

The unit controller's primary function is processing data relating to the entire chiller unit operation, as compared to data relating to the compressor operation. The unit controller processes information and sends data to other controllers and devices and relays information to the OITS for graphic display.

The following functions operate in the unit controller:

User interface BAS interface Field I/O; pumps, alarm contact, remote start/stop, tower control Chiller I/O; water temperatures, EXV control, condenser pressure Data trending Chiller alarm handling Alarm display

Figure 5, Unit Control Panel

CPU Bracket

(1) USB Port on Top of Bracket

External Control Wiring Entry Knockouts (4)

(2) USB Ports Under Bracket

Unit Switch Normal Shutdown

Comp. Switch Immediate Stop

External Normal Shutdown Switch

Ethernet Port

M7-36

OMM 1034-4 11

Motor/Compressor Controller The following functions operate in the compressor controller:

Bearing Control Suction/Discharge Temperature and Pressure IGV control Speed Control RPM sensing Load Control Compressor Alarm Handling Motor Temperature control Compressor staging and load balancing on multi-chiller installations

VFD Controller The following functions operate in the VFD controller:

Controls motor according to speed setpoint VFD heat…