York YST Steam Turbine Centrifugal Chiller User guide

Brand: York

Model: YST Steam Turbine Centrifugal Chiller

Type: User guide

FORM 160.67-EG1 (408)

700 Through 2165 TR

(2500 Through 7400 kW)

Utilizing HFC-134a

Model YST Steam-Turbine Drive Centrifugal Liquid Chillers

Design Level F

2 JOHNSON CONTROLS

NOMENCLATURE

The model number denotes the following characteristics of the unit:

YST VF VD J4 - KD71750090 - 14 - 0.6 - 33192C - F S

Chiller Model

Evaporator Code

Condenser Code

Compressor Code

Steam Turbine Base Model

Steam Condenser Model

Design Level

Special (Mandatory)

No. of Turbine Nozzles

Turbine Expansion Ratio

Table of Contents

FORM 160.67-EG1 (308) ....................................................................................................................................................................................... 1

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

Ratings .................................................................................................................................................................................................................. 5

Optiview Control Center ...................................................................................................................................................................................... 6

Equipment Specications .................................................................................................................................................................................... 7

Accessories and Modications ......................................................................................................................................................................... 12

Application Data ................................................................................................................................................................................................. 14

Top Mtd. Unit Dimensions - (Ft. - In.) ............................................................................................................................................................... 20

Top Mtd. Unit Dimensions (Ft. - In.) - continued .............................................................................................................................................. 22

Dimensions - Evap. Compact Water Boxes (English) ................................................................................................................................... 23

Dimensions - Evaporator Marine Water Boxes (English) .............................................................................................................................. 24

Dimensions - Condenser Marine Water Boxes (English) .............................................................................................................................. 25

Dimensions - Nozzle Arrangements (English) ............................................................................................................................................... 26

Dimensions - Floor Mtd. Unit (English) ............................................................................................................................................................ 27

Form 3 Shipment Dimensions ........................................................................................................................................................................... 28

Form 7 Shipment Dimensions ........................................................................................................................................................................... 29

Steam Condenser Dimensions - (English) ....................................................................................................................................................... 30

Unit Dimensions - (mm) .................................................................................................................................................................................. 32

Nozzle Arrangements & Dimensions - (mm) .................................................................................................................................................... 36

Floor Mtd. Unit Dimensions - (mm) .................................................................................................................................................................. 40

Steam Condenser Dimensions - (mm).............................................................................................................................................................. 43

Weights ................................................................................................................................................................................................................ 44

Guide Specications .......................................................................................................................................................................................... 49

FORM 160.67-EG1 (308)

3JOHNSON CONTROLS

Introduction

The YORK YST MaxE™ Chillers offer a complete combi-

nation of features for total owner satisfaction.

MATCHED COMPONENTS MAXIMIZE EFFICIENCY

Overall chiller efciency cannot be determined by analyz-

ing the theoretical efciency of any one chiller component.

It requires a specic combination of heat exchanger,

compressor, steam turbine and steam condenser perfor-

mance to achieve the lowest system steam rate. YORK

YST MaxE chiller technology matches chiller system

components to provide maximum chiller efciency under

actual - not just theoretical - operating conditions.

REAL-WORLD ENERGY PERFORMANCE

Johnson Controls pioneered the term “Real-World En-

ergy” to illustrate the energy-saving potential of focus-

ing on chiller performance during off-design conditions.

Off-design is not only part load, but full load operation as

well, with reduced entering refrigerant condenser water

temperatures (ECWTs). This is where chillers operate 99%

of the time, and where operating costs add up.

The YST MaxE chillers are the only chillers designed

to operate on a continuous basis with cold ECWT and

full refrigerant condenser ow at all load points, taking

full advantage of Real-World conditions. This type of

operation benets the cooling tower as well; reducing

cycling of the fan motor and ensuring good coverage of

the cooling ll.

YORK YST MaxE chillers offer the most efcient Real-

World operation of any chiller, meaning lower operating

costs and an excellent return on your chiller investea-

ment.

OPEN DRIVE DESIGN

YORK YST MaxE centrifugal chillers utilize an open

drive compressor that enables the use of various drives.

Specically, the YST uses a Steam Turbine to provide

the rotational power to drive the chiller. The use of steam

as the motive energy provides owners the ability to take

advantage of the most effective energy source available

either by using steam only or by complementing this with

other “hybrid” energy sources such as electric or gas.

HIGH-EFFICIENCY HEAT EXCHANGERS

YST MaxE chiller heat exchangers offer the latest tech-

nology in heat transfer surface design to give maximum

efciency and compact design. Water, refrigerant and

steam side design enhancements minimize both energy

consumption and tube fouling.

SINGLE-STAGE COMPRESSOR DESIGN AND EF-

FICIENCY PROVEN IN THE MOST DEMANDING AP-

PLICATIONS

Designed to be the most reliable chillers we’ve ever made,

YORK YST MaxE centrifugal chillers incorporate single-

stage compressor design. With fewer moving parts and

straightforward, efcient engineering, YORK single-stage

compressors have proven durability records in hospitals,

chemical plants, gas processing plants, the U.S. Navy,

and in other applications where minimal downtime is a

crucial concern.

In thousands of installations worldwide, YORK single-

stage compressors are working to reduce energy costs

while enhancing comfort. High strength aluminum-alloy

compressor impellers feature backward-curved vanes

for high efficiency. Airfoil shaped pre-rotation vanes

minimize ow disruption for the most efcient part load

performance. Precisely positioned and tightly tted, they

allow the compressor to unload smoothly from 100% to

minimum load for excellent operation in air conditioning

applications.

MURRAY STEAM TURBINES - PROVEN EXPERIENCE

AND HIGH EFFICIENCY

The YORK compressor, driven by a Murray Turbo-

machinery multistage steam turbine provides the best

combination of optimized efciency and proven track

record. Murray multistage turbines are used together with

innovative, automated controls to integrate the turbine and

compressor seamlessly. The ability of the steam turbine

to vary rotational speed provides optimal compressor ef-

ciency at all operating conditions and builds on Johnson

Controls’ reputation for the best in “Real-World Energy”.

Optional automated start and shutdown controls eliminate

the traditional manual intervention associated with steam

turbine systems.

FLEXIBILITY OF AN ITT STEAM CONDENSER PACK-

AGE

Unique to the YST chiller is the packaging of a steam

condenser suitable for mounting on the chiller or alongside

depending on site requirements. By designing the steam

condenser for mounting on the chiller the YST footprint

is no larger than that of traditional chillers saving space

and simplifying plant layout when the YST chiller is used

in combination with other YORK chillers. The same steam

condenser package may be installed off the chiller, if re-

quired, without modication or eliminated altogether where

a steam condensation system already exists on site.

4 JOHNSON CONTROLS

Introduction - continued

PRECISION CONTROL OF COMPRESSOR OIL PRES-

SURE

Utilizing our expertise in variable speed drive technology

and applications, Johnson Controls has moved beyond

the xed head and bypass approach of oil pressure con-

trol. The old approach only assures oil pressure at the

outlet of the pump rather than at the compressor, and

allows no adjusteament during chiller operation. The YST

MaxE chillers feature a variable speed drive oil pump,

monitoring and providing the right amount of oil ow to

the compressor on a continuous basis. This design also

provides sophisticated electronic monitoring and protec-

tion of the oil pump electrical supply, ensuring long life and

reliable operation of the oil pump motor. Variable speed

drive technology reduces oil pump power consumption,

running only at the speed required, rather than at full head

with a pressure regulating bypass valve.

FACTORY PACKAGING REDUCES FIELD LABOR

COSTS

YORK YST MaxE centrifugal chillers are designed to keep

installation costs low. Where installation access is not a

problem, the chiller can be shipped completely packaged

with steam turbine driveline factory installed. The steam

condenser is a modular design, packaged to facilitate

site installation on top of the refrigerant condenser or

oor mounted adjacent to the chiller, either arrangement

requiring minimal piping to complete the installation. The

entire system requires a single point power connection

to minimize on site wiring.

TAKE ADVANTAGE OF COLDER COOLING TOWEr-

WATER TEMPERATURES

YORK YST MaxE centrifugal chillers have been designed

to take full advantage of colder cooling tower water

temperatures, which are naturally available during most

operating hours. Considerable energy savings are avail-

able by letting tower water temperature drop, rather than

articially holding it above 75°F (24°C), especially at low

load, as some chillers require.

FORM 160.67-EG1 (308)

5JOHNSON CONTROLS

Ratings

COMPUTERIZED PERFORMANCE RATINGS

Each chiller is custom-matched to meet the individual

building load and energy requirements. A large number

of standard heat exchangers and pass arrangements are

available to provide the best possible match.

It is not practical to provide tabulated performance for each

combination, as the energy requirements at both full and

part load vary signicantly with each heat exchanger and

pass arrangement. Computerized ratings are available

through each Johnson Controls sales ofce. These ratings

can be tailored to specic job requirements.

OFF-DESIGN PERFORMANCE

Since the vast majority of its operating hours are spent

at off-design conditions, a chiller should be chosen not

only to meet the full load design, but also for its ability to

perform efciently at lower loads and lower tower water

temperatures. It is not uncommon for chillers with the

same full load to have an operating cost difference of over

10% due to part-load operation.

Part load information can be easily and accurately gener-

ated by use of the computer. And because it is so important

to an owner’s operating budget, this information has now

been standardized in the form of an Integrated Part Load

Value (IPLV), and Non-Standard Part Load Value (NPLV).

The IPLV / NPLV formulas, in accordance with ARI Stan-

dard 550/590 guidelines, much more closely track actual

chiller operations. A more detailed analysis must take into

account actual building load proles, and local weather

data. Part load performance data should be obtained for

each job using its own design criteria.

6 JOHNSON CONTROLS

Optiview Control Center

YST OPTIVIEW CONTROL CENTER

The YORK OptiView Control Center, furnished as standard

on each chiller, provides the ultimate in efciency, auto-

mation, monitoring, data recording, chiller protection and

operating ease. The Control Center is a factory-mounted,

wired and tested state-of-the-art microprocessor based

control system for R134a centrifugal chillers. The panel

is congured with a 10.4" diagonal color Liquid Crystal

Display (LCD) surrounded by “soft” keys, which are rede-

ned with one keystroke based on the screen displayed

at that time. This revolutionary development makes chiller

operation quicker and easier than ever before. Instead of

requiring keystroke after keystroke to hunt for information

on a small monochrome LCD screen, a single button

reveals a wide array of information on a large, full-color

illustration of the appropriate component, which makes

information easier to interpret.

The LCD display allows graphic animated display of the

chiller, chiller sub-systems and system parameters; this

allows the presentation of several operating parameters

at once. The novel use of on screen animation enables

operators to more readily identify component status. In

addition, the operator may view a graphical representation

of the historical operation of the chiller as well as the pres-

ent operation. A Status Bar is displayed at all times on all

screens. It contains the System - Status Line and Details

Line, the Control Source, Access Level, Time and Date.

During turbine slow roll, startup, operation and coast-

down, the system status will indicate vital information

available at any time. The locations of various chiller pa-

rameters are clearly marked and instructions for specic

operations are provided on many of the screens. Data

can be displayed in either English or SI units.

Security access is provided to prevent unauthorized

changes of setpoints. This is accomplished with three

different levels of access and passwords for each level.

There are certain screens, displayed values, program-

mable setpoints and manual controls not shown that are

for servicing the chiller. They are only displayed when

logged in at service access level. Included in this is the

Advanced Diagnostics and troubleshooting information

for the chiller and the panel.

The control center power supply is provided from a fused

2 KVA transformer located in the power panel.

The control center is also fused to provide individual over-

current protected power for the remote mounted water

pump motor starters (supplied by others) and the controls

installed on the chiller. Numbered terminal strips for wir-

ing such as Remote Start / Stop, Chilled Water Pump

and Local or Remote Cycling devices are provided. The

Panel also provides eld interlocks that indicate the chiller

status. These contacts include a Remote Mode Ready-

to-Start, a Controlled Shutdown, a Safety Shutdown and

a chiller Run contact. System pressures are monitored

with transmitters (4-20 mA) and transducers (0-5 VDC).

System temperatures are monitored using thermistors

and RTD’s.

Setpoints can be changed from a remote location via 0-

10VDC and 4-20mA, contact closures or through serial

communications. The adjustable remote reset range [up to

20°F (11.1°C)] provides exible, efcient use of remote sig-

nal depending on reset needs. Serial data interface to the

YORK ISN Building Automation System (BAS) is through

the optional Microgateway Card, which can be mounted

inside the Control Center. Interfaces using other industry

standard protocols such as MODBUS RTU, Johnson NZ,

BACnet MS/TP, LONMARK and ASCII are available.

The operating program is stored in non-volatile mem-

ory to eliminate chiller failure due to AC power failure/

battery discharge. Programmed setpoints are retained in

lithium battery-backed RTC memory for 10 years (when

the panel is kept at 25°C).

Smart Freeze Point Protection will run the chiller at 36°F

(2.2°C) leaving chilled water temperature eliminating

nuisance trips on Low Water Temperature. The sophisti-

cated program and sensors will monitor the chiller water

and evaporator refrigerant liquid temperatures to prevent

freeze up. Every programmable point has a pop-up screen

with the allowable ranges, so that the chiller can not be

programmed to operate outside of its design limits.

The capacity control logic provides stable operation at

maximum efciency at off design conditions by modulating

the turbine speed, compressor pre-rotation vanes and hot

gas by-pass valve.

When the power is applied to the chiller, the HOME screen

is displayed. This screen displays a visual representation

of the chiller and a collection of data detailing important

operations and parameters. The primary values that need

to be monitored and controlled are shown on this screen.

The owner can be condent that the OptiView control sys-

tem for the YST is unequalled in its design, control features

and protection systems. See “Equipment Specications”

for a more detailed description of OptiView features.

FORM 160.67-EG1 (308)

7JOHNSON CONTROLS

Equipment Specications

GENERAL

The YORK YST MaxE Centrifugal Liquid Chillers are

completely factory-packaged including the evaporator, re-

frigerant condenser, compressor, steam turbine, lubrication

systems, power panel, control center, and all interconnect-

ing unit piping and wiring. The steam condenser package

is shipped separately. It is suitable for direct mounting onto

the chiller or mounting along-side.

The initial charge of refrigerant and oil is supplied for each

chiller. When the optional refrigerant-condenser isolation

valves are ordered, the unit may ship fully charged with

refrigerant and oil. Actual shipping procedures will depend

on a number of project-specic details.

The services of a Johnson Controls factory-trained, eld

service representative are incurred to supervise or perform

the nal leak testing, charging, the initial start-up, and con-

current operator instructions.

COMPRESSOR

The compressor is a single-stage centrifugal type powered

by a steam turbine. The casing is fully accessible with ver-

tical circular joints and fabricated of close-grain cast iron.

The complete operating assembly is removable from the

compressor and scroll housing.

The rotor assembly consists of a heat-treated alloy steel

drive shaft and impeller shaft with a high strength, cast

aluminum alloy, fully shrouded impeller. The impeller is de-

signed for balanced thrust and is dynamically balanced and

overspeed tested for smooth, vibration-free operation.

The insert-type journal and thrust bearings are fabricated

of aluminum alloy. They are precision bored and axially

grooved. The specially engineered, single helical gears with

crowned teeth are designed so that more than one tooth is

in contact at all times to provide even distribution of com-

pressor load and quiet operation. Gears are assembled in

the compressor rotor support and are lm lubricated. Each

gear is individually mounted in its own journal and thrust

bearings to isolate it from impeller and turbine forces.

CAPACITY CONTROL

During part load operation at off design conditions, the

chiller capacity is reduced to maintain a constant leaving

chilled liquid temperature. This is accomplished by rst

decreasing the speed, then closing the compressor pre-

rotation vanes (PRV). This reduces capacity from 100%

to 15% of design for normal air conditioning applications.

The speed is controlled by a pneumatically actuated gov-

ernor valve which throttles the turbine inlet steam ow to

maintain the speed dictated by the capacity control logic.

If the tower water temperatures must be held above 75°F

for other chillers, the capacity control logic automatically

limits the amount of speed reduction and PRV closure

to maintain stable operation. The hot gas by-pass valve

is then modulated to maintain a constant leaving chilled

liquid temperature with loads down to 10% of design.

Rugged, airfoil shaped, cast manganese bronze vanes

are precisely positioned by solid vane linkages connected

to the electric actuator. The vanes are actuated by an

external, electric PRV actuator.

COMPRESSOR LUBRICATION SYSTEM

Lubrication oil is force-fed to all bearings, gears and

rotating surfaces by a variable speed drive pump which

operates continuously during unit operation and during

coastdown. A gravity-fed oil reservoir is built into the top

of the compressor to provide lubrication during coastdown

in the event of a power failure.

An oil reservoir, separate from the compressor, contains

the 2 HP submersible oil pump and 3000 watt immersion-

type oil heater. The oil heater is thermostatically controlled

to remove refrigerant from the oil.

Oil is ltered by an externally mounted 1/2 micron replace-

able cartridge oil lter equipped with service valves. Oil is

cooled via a shell and tube, water cooled oil cooler. It uses

refrigerant condenser water as the cooling medium. The

oil side of the oil cooler is provided with service valves.

Oil piping is completely factory-installed. The water side

of the oil cooler is provided with service valves, inlet

strainer and solenoid valve for automatic start/stop of

cooling water ow. Water piping is factory installed with

customer connections conveniently brought to the edge

of the chiller package and clearly tagged for installation.

An automatic oil return system recovers any oil that may

have migrated to the evaporator. Oil temperature control

is by a three-way temperature control valve.

STEAM TURBINE

The steam turbine is a high efciency multistage design

operating at a maximum speed of 4500 rpm.

The turbine is packaged on a driveline base and com-

pletely factory piped. The driveline base has a mating

ange on shaft end of the package that will bolt directly

to the compressor D-ange face providing a rigid inter-

face between turbine package and compressor. The

turbine/compressor driveline is factory aligned prior to

shipment. The turbine drive shaft is directly connected

to the compressor shaft with a exible disc coupling. The

coupling is of an all metal construction with no wearing

parts assuring long life and no lubrication requirements

providing low maintenance.

8 JOHNSON CONTROLS

Equipment Specications - continued

The turbine casing is horizontally split. It is designed to

allow longitudinal thermal expansion without the affect-

ing alignment or efciency of the turbine. The shaft and

wheels are alloy steel with the wheels shrunk and keyed

to the shaft. The turbine blades are 403 grade stainless

steel and the shaft is ground throughout with stainless

steel sprayed in the carbon ring end gland contact area.

Stainless steel steam nozzles are furnished throughout

the turbine. Carbon ring-end gland and diaphragm seals

are furnished. The turbine-end gland carbon-ring seals

(minimum ve seals per end gland) are separated by

partitions of stainless steel.

A inlet steam strainer is supplied. It has adequate size

and mesh to minimize the pressure drop. The strainer

is removable without breaking the steam piping connec-

tions and is fabricated from stainless steel.

Blanket insulation is furnished on the steam chest and

barrel of the turbine for operator protection and to en-

hance efciency.

The turbine speed is controlled by a governor valve

which is integrated with the chiller controls. The valve is

of stainless steel with stainless steel seats. It is designed

to control ow throughout the entire operating range of

the turbine. The system employs an overspeed governor

designed to close an independent high performance

buttery trip valve when the turbine speed exceeds 110

percent of the maximum continuous operating speed.

Activation of the independent trip valve causes the gov-

ernor valve to also close. A micro switch is furnished on

the trip linkage for the customer’s use.

TURBINE LUBRICATION SYSTEMS

Ring Oil Lubricated Turbines - Drive powers less than

1700Hp (1268 kW) only:

The bearings are of the steel-backed, babbitt-lined,

split-sleeve type. The design is such that the bot-

tom half is removable with the shaft in place. The

bearing housing has provisions for air purging of

the housing shaft seals. The thrust bearing is a ball

bearing type, accessible and removable without

lifting the top half of the turbine casing. Oil cooling

is by water cooled bearing housings.

External, Pressurized Lube System Turbines:

The bearings are of the steel-backed, babbitt-lined,

split-sleeve type. The design is such that the bottom

half is removable with the shaft in place. The bear-

ing housing has provisions for purging air from the

housing shaft seals. The thrust bearing is a double

acting, Kingsbury type. The lubrication system is

integral to the turbine driveline base and completely

factory piped. The lubrication system consists of a

shaft driven main oil pump, motor driven auxiliary

oil pump, water cooled shell and tube oil cooler, 25

micron full ow oil lter and separate oil reservoir

with level gauge. Oil temperature control is by a

three way temperature control valve.

STEAM CONDENSER PACKAGE

A steam condenser is provided to condense exhaust

steam at vacuum pressures to maintain efcient turbine

operation. The steam condenser water circuit is piped

in series with the refrigerant condenser, eliminating a

separate cooling water circuit. It is designed to minimize

pressure drop for energy savings.

The steam condenser is furnished fully packaged. The

package includes a single hotwell pump, a single liquid

ring vacuum pump for air removal, atmospheric relief

valve, and level control system. The package is factory

piped, wired and mounted on a steel frame suitable for

installation on the refrigerant condenser or on the oor

adjacent to the chiller system.

Condensate level is controlled by a level control system

with two pneumatic control valves - one for recirculation

and the other for removal of condensate. The liquid ring

vacuum pump is capable of drawing the condenser down

to operating pressure in approximately 10 minutes. The

hotwell pump is a single-stage, end suction type suitable

for hotwell service. The steam side is designed for 15

psig (100 kPa) and 30" Hg Vac (760 mmHg).

The atmospheric relief valve is a water-seal type with

an external handwheel, sized in accordance with the

Heat Exchange Institute Standards (HEI) for protection

of the steam turbine exhaust, steam trunk, and steam

condenser.

All key control and monitoring parameters are integrated

with the chiller control panel. In addition, auxiliary pres-

sure gauges are located at the condenser steam inlet

and condensate pump discharge piping, and temperature

gauges are located at the steam inlet, cooling water inlet

and outlet, and the hotwell.

To facilitate rigging, condenser is separable from the

skid by unbolting. Piping is outfitted with unions at

suitable break-points. Both condenser and skid are

outfitted with lifting lugs for both vertical and horizon-

tal lifting.

FORM 160.67-EG1 (308)

9JOHNSON CONTROLS

HEAT EXCHANGERS

Shells

Evaporator, refrigerant condenser and steam condenser

shells are fabricated from rolled carbon steel plates with

fusion welded seams. Carbon steel tube sheets, drilled

and reamed to accommodate the tubes, are welded to

the end of each shell. Intermediate tube supports are

fabricated from carbon steel plates, drilled and reamed to

eliminate sharp edges. The refrigerant side of each shell is

designed, tested, and stamped in accordance with ASME

Boiler and Pressure Vessel Code, Section VIII - Division I,

or other pressure vessel code as appropriate. The steam

side of the steam condenser is designed in accordance

with the Heat Exchange Institute (HEI), an industry stan-

dard for steam condenser technology.

Tubes

Refrigerant heat exchanger tubes are a high-efciency,

externally and internally enhanced type to provide op-

timum performance. Tubes in both the evaporator and

refrigerant condenser are 3/4" O.D. (19 mm) copper al-

loy and utilize the “skip-n” design, providing a smooth

internal and external surface at each intermediate tube

support. This provides extra wall thickness (up to twice

as thick) and non-work hardened copper at the support

location, extending the life of the heat exchangers. Each

tube is roller-expanded into the tube sheets providing a

leak-proof seal, and is individually replaceable. Steam

condenser tubes are copper, providing economical and

efcient heat transfer.

Evaporator

The evaporator is a shell and tube, ooded-type heat ex-

changer. A distributor trough provides uniform distribution

of refrigerant over the entire shell length to yield optimum

heat transfer. A suction bafe or aluminum mesh elimina-

tors are located above the tube bundle to prevent liquid

refrigerant carryover into the compressor. A 1-1/2" (38

mm) liquid level sight glass is conveniently located on the

side of the shell to aid in determining proper refrigerant

charge. The evaporator shell contains a dual-refrigerant

relief-valve arrangement set at 180 psig (1241 kPa); or

single relief-valve arrangement, if the chiller is supplied

with the optional refrigerant isolation-valves. A 3/4" (19

mm) are male charging connection is provided.

Refrigerant Condenser

The refrigerant condenser is a shell and tube type, with

a discharge-gas bafe to prevent direct high velocity im-

pingement on the tubes. The bafe is also used to distrib-

ute the refrigerant gas ow properly for most efcient heat

transfer. An integral sub-cooler is located at the bottom of

the refrigerant condenser shell providing highly effective

liquid refrigerant subcooling to provide the highest cycle

efciency. The refrigerant condenser contains dual refrig-

erant relief valves set at 235 psig (1620 kPa).

Steam Condenser

Steam condenser construction is of the shell and tube

type of welded steel construction with 3/4" OD (19 mm)

copper tubes, roller-expanded into tube sheets. An im-

pingement plate located below the centrally located steam

inlet redirects steam ow to protect the tubes from high

velocity steam. Subcooling sections in the condenser

cool non-condensibles sufciently below the condensing

temperature thereby reducing the vacuum pump capacity

required. The water side is suitable for a maximum working

pressure of 150 psig (1030 kPa). An atmospheric relief

valve, sized per HEI to protect the condenser, is included.

This relief valve is set to open at 1-2 psig (7-14 kPa) and

will prevent pressure in the condenser shell from exceed-

ing 10 psig (69 kPa). Seal water is required to maintain a

liquid seal in the valve. An inlet and overow connection

is provided on the valve for this purpose.

Water Boxes

The water boxes are fabricated from steel and are marine

style (compact or marine available on evaporator). The

standard design working pressure is 150 psig (1030 kPa)

and the chiller boxes are tested at 225 psig (1550 kPa).

Steam condenser boxes are tested at 215 psig (1480kPa).

Integral steel water bafes are located and welded within

the water box to provide the required pass arrangements.

Stub-out water nozzle connections with grooves are

welded to the water boxes. These nozzle connections

are suitable for ANSI/AWWA C-606 couplings, welding

or anges, and are capped for shipment. Plugged 3/4"

NPTI (19 mm) drain and vent connections are provided

in each water box.

REFRIGERANT FLOW CONTROL

Refrigerant ow to the evaporator is controlled by the

YORK variable orice control system. The liquid refriger-

ant level is continuously monitored to provide optimum

subcooler, refrigerant condenser and evaporator perfor-

mance. The variable orice electronically adjusts to all

Real-World operating conditions, providing the most ef-

cient and reliable operation of refrigerant ow control.

POWER PANEL

All motor contactors and circuit protectors, the compressor

oil pump variable speed drive and the control power trans-

former are contained in an enclosure installed adjacent to the

OptiView control center. A main power disconnect switch is

supplied which provides the termination points for customer’s

single point power supply wiring.

OPTIVIEW CONTROL CENTER

10 JOHNSON CONTROLS

Equipment Specications - continued

General

The chiller is controlled by a stand-alone microprocessor

based control center. The chiller control panel provides

control of entire system, including turbine and steam

condenser operation and monitoring.

The control panel includes a 10.4". diagonal color liquid

crystal display (LCD) surrounded by “soft” keys which are

redened based on the screen displayed at that time. The

display is mounted in the middle of a keypad interface and

protected by a locked enclosure. The screen details all

operations and parameters, using a graphical representa-

tion of the chiller and its major components. Panel text is

in English only. Data can be displayed in either English

or Metric units. Additional features are:

• Smart Freeze Point Protection capable of running

the chiller at 36°F (2.2°C) leaving chilled water

temperature eliminating nuisance trips on low water

temperature. The sophisticated program and sensors

monitor the chiller water and evaporator refrigerant

liquid temperatures to prevent freeze-up.

• The panel displays countdown timer messages so the

operator knows when functions are starting and stop-

ping. Every programmable point has a pop-up screen

with the allowable ranges, so that the chiller can not be

programmed to operate outside of its design limits.

• Security access is built in to prevent unauthorized

change of setpoints, to allow local or remote control

of the chiller, and to allow manual operation of the

pre-rotation vanes and oil pump. Access is through ID

and password recognition, which is dened by three

different levels of user competence: view, operator,

and service.

• Trending data is available with the ability to customize

points from once every second to once every hour.

The panel will trend up to 6 different parameters from

a list of over 140, without the need of an external

monitoring system.

• The operating program is stored in non-volatile

memory to eliminate reprogramming the chiller due to

AC power failure or battery discharge. Programmed

setpoints are retained in lithium-battery-backed RTC

memory for a minimum of 11 years with power re-

moved from the system.

• Includes an RS-232 port to output all system operating

data, shutdown/cycling message, and a record of the

last 10 cycling or safety shutdowns to a eld-supplied

printer. Data logs to a printer at a set programmable

interval. This data can be pre-programmed to print

from 1 minute to 1 day.

• The text displayed within the system status and sys-

tem details eld is displayed as a color-coded mes-

sage to indicate severity: red for safety fault, orange

for cycling faults, yellow for warnings, and green for

normal messages.

The chiller control panel provides a multitude of diagnostic

and operating data too numerous to cover completely in

this guide. However, a general description of some of

the data available and examples of the various screens

provided follows:

Some highlights (not all inclusive) of the data available

on the panel are as follows:

System Operating Information

Evaporator

• Leaving and return chilled water temperature

• Refrigerant liquid temperature - evaporator

• Evaporator pressure

• Hot gas control status

• Chilled water ow

Refrigerant Condenser

• Entering and leaving refrigerant condenser water

temperature

• Refrigerant liquid temperature - refrigerant condens-

• Refrigerant condenser pressure

• Subcooler refrigerant liquid level

• Subcooler refrigerant liquid level control status

• Refrigerant condenser water ow

Compressor

• Compressor discharge temperature

• Compressor oil temperature

• Compressor supply oil pressure

• Compressor thrust bearing proximity probe gap (J

compressors only)

• Pre-rotation vanes (PRV) position

Steam Turbine

• Turbine shaft end bearing temperature

• Turbine governor end bearing temperature

• Turbine inlet steam temperature

• Turbine inlet steam pressure

• Turbine rst stage steam pressure

• Turbine exhaust pressure

• Turbine speed

• Turbine governor control status

Steam Condenser

• Hotwell condensate level

• Hotwell level control status

FORM 160.67-EG1 (308)

11JOHNSON CONTROLS

Safety shutdowns

(will prevent unit from starting or operating)

• Evaporator - low pressure

• Evaporator - low temperature (Smart Freeze Point

Protection)

• Evaporator - transducer or leaving liquid probe fail-

ure

• Evaporator - transducer or temperature sensor fail-

ure

• Refrigerant condenser - high pressure contacts

open

• Refrigerant condenser - high pressure

• Refrigerant condenser - pressure transducer out-of-

range

• Compressor discharge - high temperature

• Compressor discharge - low temperature

• Compressor oil -high temperature

• Compressor oil - low differential temperature

• Compressor oil - high differential pressure

• Compressor oil - sump pressure transducer out-of-

range

• Compressor oil - differential pressure calibration

• Compressor oil - variable speed pump - pressure

setpoint not achieved

• Compressor thrust bearing - proximity probe uncali-

brated (J compressors only)

• Compressor thrust bearing - proximity probe clear-

ance (J compressors only)

• Compressor thrust bearing - proximity probe out-of-

range (J compressors only)

• Control panel - power failure

• Turbine governor end bearing high temperature

• Turbine shaft end bearing high temperature

• Turbine oil - low pressure

• Turbine oil - high temperature

• Turbine underspeed

• Turbine exhaust high pressure

• Standby hotwell pump fault (warning on failure of

primary pump)

• Standby vacuum pump - no sealing water ow (warn-

ing on failure of primary system)

• Standby vacuum pump fault (warning on failure of

primary pump)

• Hotwell condensate high level

• Hotwell condensate low level

CODES AND STANDARDS

• ASME Boiler and Pressure Vessel Code - Section Vlll

Division 1.

• Heat Exchange Institute (HEI), Industry Standard for

Steam Condensers

• NEMA (SM23) Steam Turbines for Mechanical Drive

Services

• Expansion Joint Manufacturers Assoc., Inc. (EJMA)

• ARI Standard 550/590

• ASHRAE 15 - Safety Code for Mechanical Refrigera-

tion

• ASHRAE Guideline 3 - Reducing Emission of Haloge-

nated Refrigerants in Refrigeration and Air-Condition-

ing Equipment and Systems

• N.E.C. - National Electrical Code

• OSHA - Occupational Safety and Health Act

ISOLATION MOUNTING

The unit is provided with four vibration isolation mounts

consisting of 1" (25.4 mm) thick neoprene isolation pads

for eld mounting under the steel mounting plates located

on the tube sheets.

REFRIGERANT CONTAINMENT

The refrigerant circuit has been designed as a factory-

packaged system. As such, it has minimum joints from

which refrigerant can leak. The entire assembly has been

thoroughly leak tested at the factory prior to shipment.

The YORK chiller includes service valves conveniently

located to facilitate transfer of refrigerant to a remote

refrigerant storage/recycling system. Optional refrigerant

condenser isolation valves allow storage of the charge in

the refrigerant condenser.

PAINT

Exterior surfaces are protected with one coat of Caribbean

blue, durable alkyd-modied, vinyl enamel, machinery

paint.

SHIPMENT

Protective covering is furnished on the control center.

Water nozzles are capped with tted plastic enclosures.

Entire unit is protected with industrial-grade, reinforced

shrink-wrapped covering.

12 JOHNSON CONTROLS

Accessories and Modications

FLOOR MOUNTED STEAM CONDENSER

As an alternative to the standard packaged location, the

steam condenser package can be ordered for oor mount-

ing adjacent to the chiller package. Prefabricated piping

kits for the steam trunk, water piping and wiring between

chiller package and steam condenser are not included

with a oor mounted arrangement. These interconnect-

ing components must be designed, supplied and installed

by customer.

Note: Interconnecting components may be ordered

through the factory via a special quote upon request (site

arrangement details will be required at time of request

for quote).

AUTO-START CONTROL FEATURES

When this option is ordered, the chiller is provided with all

components and programming for the OptiView micropan-

el to automatically control the start-up and shutdown of the

system. All solenoids and automated components neces-

sary for full automation are provided. Some parts will ship

loose for installation at job site. An automatic pressure

powered pump is also provided for draining condensate

from the steam turbine casing during operation.

DUAL PUMPS FOR STEAM CONDENSER PACKAGE

Factory installed secondary (100% standby duty) con-

densate and vacuum pumps, including all interconnecting

piping is available. Automatic switchover to a standby

pump in the event of a primary pump failure is included

in this option.

STEAM TURBINE CASING DRAIN OPTIONS

The steam turbine casing must be provided with a means

of draining during operation (while under vacuum). Fac-

tory options available for this function are:

• Automatic pressure powered pump

• Manual condensate drain tank (by special quote)

• Automatic condensate drain tank (by special quote)

Casing drain equipment is shipped loose for installation

at job site.

FACTORY INSULATION

Factory-applied thermal insulation of the exible, closed-

cell neoprene type, 3/4" (19 mm) thick is attached with

vapor-proof cement to the evaporator shell, ow cham-

ber, tube sheets, suction connection, and (as necessary)

to the auxiliary tubing. Not included is the insulation of

compact water boxes and nozzles. This insulation will

normally prevent condensation in environments with

relative humidities up to 75% and dry bulb temperatures

ranging from 50° to 90°F (10° to 32°C). 1-1/2" (38 mm)

thick insulation is also available for relative humidities up

to 90% and dry bulb temperatures ranging from 50° to

90°F (10° to 32°C).

The turbine steam chest is insulated with a custom tted,

berglass insulating blanket for protection of personnel

and enhancement of efciency.

WATER FLANGES

150 psig (1030 kPa) ANSI raised-face anges for re-

frigerant condenser, evaporator and steam condenser

water connections, are factory-welded to water nozzles.

Companion anges, bolts, nuts and gaskets are not

included.

MARINE WATER BOXES

Marine water boxes allow service access for cleaning of

the heat exchanger tubes without the need to break the

water piping. Bolted-on covers are arranged for conve-

nient access. Victaulic nozzle connections are standard;

anges are optional. Marine water boxes are available for

the evaporator (limited arrangements only).

Note: Marine water boxes are standard scope of supply on the

refrigerant and steam condensers.

KNOCK-DOWN SHIPMENT

The chiller can be shipped knocked down into major sub-

assemblies (evaporator, refrigerant condenser, driveline,

etc.) as required to rig into tight spaces. This is particu-

larly convenient for existing buildings where equipment

room access does not allow rigging a factory-packaged

chiller.

NOTE: Vertical rigging of components not allowed unless special

design is ordered by special quote (SQ).

REFRIGERANT ISOLATION VALVES

Optional factory-installed isolation valves in the compres-

sor discharge line and refrigerant liquid line are available.

This allows isolation and storage of the refrigerant charge

in the chiller refrigerant condenser during servicing, elimi-

nating time-consuming transfers to remote storage ves-

sels. Both valves are positive shut-off, assuring integrity

of the storage system.

300 PSIG WATERSIDE DESIGN PRESSURE

Applications with greater than 150 psig (1030 kPa) water

pressure can be accommodated by special quote upon

request. Special design required for all heat exchanger

FORM 160.67-EG1 (308)

13JOHNSON CONTROLS

water boxes and turbine/compressor cooling water cir-

cuits.

BAS NETWORK INTERFACE

A communication interface permitting complete exchange

of chiller data with any BAS System is available with op-

tional ISN MicroGateway. The Micro-Gateway also allows

a BAS System to issue commands to the chiller to control

its operation. All control data points are accessible to the

BAS System. For full list of points, contact a Johnson

Controls Representative.

REFRIGERANT STORAGE / RECYCLING SYSTEM

A refrigerant storage/recycling system is a self-contained

package consisting of a refrigerant compressor with oil

separator, storage receiver, water-cooled condenser, lter

drier and necessary valves and hoses to remove, replace

and distill refrigerant. All necessary controls and safety

devices are a permanent part of the system. Typically not

required if unit isolation valves are provided.

14 JOHNSON CONTROLS

Application Data

The following discussion is a user’s guide in the applica-

tion and installation of YST MaxE chillers to ensure the

reliable, trouble-free life for which this equipment was

designed. While this guide is directed towards normal,

water-chilling applications, the Johnson Controls sales

representative can provide complete recommendations

on other types of applications.

LOCATION

YST MaxE chillers are virtually vibration free and may

generally be located at any level in a building where

the construction will support the total system operating

weight.

The unit site must be a oor, mounting pad or foundation

which is level within 1/4" (6 mm) and capable of support-

ing the operating weight of the unit.

Sufcient clearance to permit normal service and mainte-

nance work should be provided all around and above the

unit. Additional space should be provided at one end of the

unit to permit cleaning of evaporator, refrigerant condenser

and steam condenser tubes, as required. A doorway or

other properly located opening may be used.

The chiller is designed to be installed in an indoor location

where temperatures range from 40°F to 104°F (4.4°C to

40°C).

WATER piping

Flow Rate - For normal water chilling duty, evaporator and

refrigerant condenser ow rates are permitted at water

velocity levels in the heat exchangers tubes of between

3 ft/sec and 12 ft/sec (0.9 m/s and 3.7 m/s). Variable ow

applications are possible, however, chiller selections must

be made using a water velocity within the range noted

above. Variable ow in the refrigerant condenser is not

recommended, as it generally raises the energy consump-

tion of the system by keeping the refrigerant condenser

pressure high in the chiller. Additionally, the rate of fouling

in the refrigerant condenser will increase at lower water

velocities associated with variable ow, raising system

maintenance costs. Cooling towers typically have narrow

ranges of operation with respect to ow rates and will be

more effective with full design ow. Refer to Table 1 for

ow limits.

Temperature Ranges - For normal water chilling duty,

leaving chilled water temperatures may be selected

between 38°F (3.3°C) [36°F (2.2°C) with Smart Freeze

enabled] and 70°F (21°C) for water temperature ranges

between 3°F and 30°F (1.7°C and 16.7°C).

Water Quality – The practical and economical applica-

tion of liquid chillers requires that the quality of the water

supply for the condensers and evaporator be analyzed by

a water treatment specialist. Water quality may affect the

performance of any chiller through corrosion, deposition

of heat-resistant scale, sedimentation or organic growth.

These will degrade chiller performance and increase op-

erating and maintenance costs. Normally, performance

may be maintained by corrective water treatment and

periodic cleaning of tubes. If water conditions exist which

cannot be corrected by proper water treatment, it may be

necessary to provide a larger allowance for fouling, and/or

to specify special materials of construction.

General Piping – All chilled water and condenser water

piping should be designed and installed in accordance

with accepted piping practice. Chilled water and con-

denser water pumps should be located to discharge

through the chiller to assure positive pressure and ow

through the unit. Piping should include offsets to provide

exibility and should be arranged to prevent drainage of

water from the evaporator and condenser when the pumps

are shut off. Piping should be adequately supported and

braced independently of the chiller to avoid the imposi-

tion of strain on chiller components. Hangers must allow

for alignment of the pipe. Isolators in the piping and in

the hangers are highly desirable in achieving sound and

vibration control.

Convenience Considerations – To facilitate the per-

formance of routine maintenance work, some or all of

the following steps may be taken by the purchaser: heat

exchanger water boxes are equipped with plugged vent

and drain connections. If desired, vent and drain valves

may be installed with or without piping to an open drain.

Pressure gauges with stop cocks and stop valves may

be installed in the inlets and outlets of the condensers

and chilled water line as close as possible to the chiller.

An overhead monorail or beam may be used to facilitate

servicing.

Connections – The standard chiller is designed for 150

psig (1030 kPa) design working pressure in both the

chilled water and condenser water circuits. The connec-

tions (water nozzles) to these circuits are furnished with

grooves for Victaulic couplings. Piping should be arranged

for ease of disassembly at the unit for tube cleaning. All

water piping should be thoroughly cleaned of all dirt and

debris before nal connections are made to the chiller.

Chilled Water – A water strainer of maximum 1/8" (3 mm)

perforated holes must be eld-installed in the chilled water

inlet line as close as possible to the chiller. If located close

enough to the chiller, the chilled water pump may be pro-

tected by the same strainer. The loss or severe reduction

of water ow due to tube blockage could seriously impair

the chiller performance or even result in tube freeze-up.

FORM 160.67-EG1 (308)

15JOHNSON CONTROLS

Condenser Water – The chiller is engineered for maxi-

mum efciency at both design and part load operation

by taking advantage of the colder cooling tower water

temperatures which naturally occur during the winter

months. Appreciable power savings are realized from

these reduced heads.

The minimum entering condenser water temperature is

provided by the following equation:

In °F: minCondWT = LChilledWT - CondRange x (PCT-

Load/100) + 5 + 12 x (PctLoad/100)

In °C: minCondWT = LChilledWT - CondRange x (PCT-

Load/ 100) + (5 + 12 x (PctLoad/100))/1.8

where:

minCondWT = entering condenser water temperature

LChilledWT = leaving chilled water temperature

CondRange = condenser water temperature range at

design.

PCTLoad = chiller load as % design

At initial startup, entering condensing water temperature

may be as much as 25°F (14°C) colder than the standby

chilled water temperature as long as it is above the mini-

mum entering condenser water temperature allowed.

A water strainer of maximum 1/8" (3 mm) perforated holes

is recommended to be eld-installed in the refrigerant con-

denser water inlet line as close as possible to the chiller.

If located close enough to the chiller, the condenser water

pump may be protected by the same strainer. The loss or

severe reduction of water ow due to tube blockage could

seriously impair the chiller performance.

STEAM AND CONDENSATE PIPING

Turbine supply steam and condensate piping connections

to the chiller are to be supplied and installed by the site

piping contractor. In addition, the turbine exhaust to the

steam condenser shall be installed by the piping con-

tractor, however, the design and supply of components

may be supplied by Johnson Controls depending on the

options chosen. Piping should be adequately supported

and braced independently of the chillers. Hangers must

allow for piping alignment at the operation temperature.

Piping contractor is responsible for the t and form of the

turbine steam piping. The piping must be installed with

the anges and bolt holes properly aligned. The bolts

should be able to be inserted without any difculty and no

force should be applied to allow the bolts to be inserted

or anges aligned. When the ange bolts are tightened,

they must not impose any force or moment on the turbine

anges. Contact your local Johnson Controls ofce for any

additional information.

RELIEF PIPING

Refrigerant Relief

Each chiller is equipped with dual pressure relief valves

on the refrigerant condenser and two dual relief valves on

the evaporator, or two single relief valves on the evapora-

tor if the optional refrigerant isolation valves are ordered.

The dual relief valves on the refrigerant condenser are

redundant and allow changing of either valve while the

unit is fully charged. The purpose of the relief valves is to

quickly relieve excess pressure of the refrigerant charge

to the atmosphere, as a safety precaution in the event of

an emergency such as re. They are set to relieve at an

internal pressure as noted on the pressure vessel data

plate, and are provided in accordance with ASHRAE 15

safety code and ASME or applicable pressure vessel

code.

Sized to the requirements of applicable codes, a vent line

must run from the relief device to the outside of the build-

ing. This refrigerant relief piping must include a cleanable,

vertical-leg dirt trap to catch vent-stack condensation.

Vent piping must be arranged to avoid imposing a strain

on the relief connection and should include one exible

connection.

Steam Relief

Each steam condenser is equipped with an atmospheric

relief valve, sized to relieve all the steam which can be

admitted to a turbine under maximum possible full throttle

conditions. The atmospheric relief valve is designed/

selected per HEI standards for steam condensers and

provides protection for the steam turbine exhaust and

exhaust trunk, as well as the steam condenser shell.

The discharge of the atmospheric relief valve should be

piped to direct a large volumetric ow of hot steam to a

safe area, away from all personnel.

SOUND AND VIBRATION CONSIDERATIONS

A YST MaxE chiller is not a source of objectionable sound

and vibration in normal air conditioning applications.

Neoprene isolation mounts are furnished as standard

with each unit.

YST MaxE chiller sound pressure level ratings will be

furnished on request.

Control of sound and vibration transmission must be taken

into account in the equipment room construction as well

as in the selection and installation of the equipment.

16 JOHNSON CONTROLS

Application Data - continued

THERMAL INSULATION

No appreciable operating economy can be achieved by

thermally insulating the chiller. However, the chiller's cold

surfaces should be insulated with a vapor barrier insula-

tion sufcient to prevent condensation. A chiller can be

factory-insulated with 3/4" (19 mm) or 1-1/2" (38 mm)

thick insulation, as an option. This insulation will nor-

mally prevent condensation in environments with dry bulb

temperatures of 50°F to 90°F (10°C to 32°C) and relative

humidities up to 75% [3/4" (19 mm) thickness] or 90% [1-

1/2" (38 mm) thickness]. The insulation is painted and the

surface is exible and reasonably resistant to wear. It is

intended for a chiller installed indoors and, therefore, no

protective covering of the insulation is usually required.

If insulation is applied to the water boxes at the job site,

it must be removable to permit access to the tubes for

routine maintenance. The turbine steam chest is factory

insulated with a custom tted, berglass insulating blanket

for protection of personnel. The blanket is removable for

maintenance access to the turbine.

VENTILATION

The ASHRAE Standard 15 Safety Code for Mechanical

Refrigeration requires that all machinery rooms be vented

to the outdoors utilizing mechanical ventilation by one or

more power-driven fans. This standard, plus National

Fire Protection Association Standard 90A, state, local and

any other related codes should be reviewed for specic

requirements. Since the YST MaxE chiller uses steam,

ventilation should allow for the removal of heat radiated

from the steam turbine.

In addition, the ASHRAE Standard 15 requires a refriger-

ant vapor detector to be employed for all refrigerants. It

is to be located in an area where refrigerant from a leak

would be likely to concentrate. An alarm is to be acti-

vated and the mechanical ventilation started at a value

no greater than the TLV (Threshold Limit Value) of the

refrigerant.

C U S T O M E R C O N N E C T I O N S / I N T E R FA C E S

(see product drawings for connection sizes)

Water/Drains

• Refrigerant condenser inlet/outlet*

• Evaporator inlet/outlet

• Turbine/Compressor cooling water manifold inlet/out-

let

• Steam condenser inlet*/outlet

• Steam condenser vacuum pump seal water: 3.5 gpm

(0.2 L/s) @ approx. 60°F (15.6 °C)

• Steam condenser vacuum pump discharge separator

vent and drain

• Steam condenser relief valve seal water: trickle ow

• Steam condenser relief valve seal water drain

• Steam turbine casing drain

• Steam turbine gland leak off drain

• Steam turbine steam ring drain

• Steam condenser condensate overboard valve: [note:

approx. 20 psig (138 kPa) discharge pressure avail-

able at outlet of overboard valve. If downstream pres-

sure requirements exceed this, a custom condensate

pump selection is required.]

• Steam condenser hotwell level system drain

• Water box vents and drains - evaporator, refrigerant

condenser and steam condenser

Steam/Vents

• Steam turbine steam inlet

• Steam turbine steam exhaust*

• Steam condenser steam inlet*

• Steam condenser relief valve vent

• Steam turbine gland sealing steam: 150 psig (1030

kPa) max. steam supply

• Steam turbine gland seal relief valve

Refrigerant Connections

• Refrigerant drain/charging connection

• Refrigerant transfer/service connections

• Refrigerant condenser relief valves(s)

• Evaporator relief valve(s)

Air (Instrument Quality Air Source - ISA S7.3)

• Steam turbine governor air supply and bearing seal

air purge: 80-150 psig (552 - 1030 kPa), approx. 13

SCFM (22 sm3/h).

• Steam condenser level control system: 20-150 psig

(138 - 1030 kPa), approx. 0.5 SCFM (0.9 sm3/h).

Power

• 460V single point power connection, approximately

28.6 KVA (KD turbine) or 24.2 KVA (KG turbine).

Required Auxiliary Components (customer supplied)

• Steam inlet strainer: Full ow strainer with ne [3/64"

(1.2 mm) perforations], stainless steel mesh, suitable

for steam service.

• Steam inlet moisture separator: Steam supply to

turbine must be dry & saturated for optimum ef-

ciency.

• Steam inlet throttling valve: Manual globe valve for

* Johnson Controls provided pre-fabricated piping for these con-

nections

FORM 160.67-EG1 (308)

17JOHNSON CONTROLS

Model

Evaporator

Model

Condenser

1 Pass 2 Pass 3 Pass 1 Pass 2 Pass 3 Pass

Min Max Min Max Min Max Min Max Min Max Min Max

1981 7921 991 3336 660 2224

2826 10179 1413 4277 – –

2330 9318 1165 3863 777 2590

3313 11935 1657 4936 – –

2738 10949 1369 4552 913 3069

3851 13873 1926 5823 – –

2961 11841 1481 4885 987 3305

4176 15044 2088 6264 – –

3182 12721 1591 5198 1061 3529

4782 17226 2391 7059 – –

2738 10949 1369 4552 913 2880

5313 19140 2657 7722 – –

2961 11841 1481 4591 987 3101

4782 17226 2391 8614 – –

3182 12721 1591 4896 1061 3318

5313 19140 2657 7267 – –

3507 14023 1754 5480 1169 3634

6075 21883 3037 8417 – –

3836 15338 1918 5947 1279 3947

6792 24467 3396 9280 – –

– – – – – – – – – – – – – –

4382 17520 2191 6851 1461 4524 – – – – – – –

5113 20442 2556 7886 1704 5214 – – – – – – –

TABLE 1 – WATER FLOW RATE LIMITS (GPM) — BASED UPON STANDARD TUBES @ DESIGN FULL

LOAD CONDITIONS

inlet steam isolation and throttling (during start up).

Note: This valve is Johnson Controls supplied when

the system auto-start option is ordered.

• Steam turbine casing drain options: The steam turbine

casing must be provided with a means of draining

during operation (while under vacuum). Customer

options for this function are an automatic pressure

powered pump, a manual condensate drain tank or

an automatic condensate drain tank.

Note: An automatic pressure powered pump is Johnaon Controls

supplied when the system auto-start option is ordered.

18 JOHNSON CONTROLS

Model

Evaporator

Model

Condenser

1 Pass 2 Pass 3 Pass 1 Pass 2 Pass 3 Pass

Min Max Min Max Min Max Min Max Min Max Min Max

125 500 62 210 42 140

178 642 89 270 – –

147 588 74 244 49 163

209 753 105 311 – –

173 691 86 287 58 194

243 875 121 367 – –

187 747 93 308 62 209

263 949 132 395 – –

201 803 100 328 67 223

302 1087 151 445 – –

173 691 86 270 58 182

335 1208 168 487 – –

187 747 93 290 62 196

302 1087 151 543 – –

201 803 100 309 67 249

335 1208 168 458 – –

221 885 111 346 74 229

383 1381 192 531 – –

242 988 121 375 81 249

429 1544 214 585 – –

– – – – – – –

276 1105 138 432 92 285 – – – – – – –

323 1290 161 498 108 329 – – – – – – –

TABLE 1A – WATER FLOW RATE LIMITS (L/S) — BASED UPON STANDARD TUBES @ DESIGN FULL

LOAD CONDITIONS

Application Data - continued

FORM 160.67-EG1 (308)

19JOHNSON CONTROLS

Application Data - continued

TABLE 2 – AVAILABLE COMPRESSOR/SHELL/TURBINE/STEAM CONDENSER MODELS

COMPRESSOR CODE EVAPORATOR CODE CONDENSER CODE TURBINE MODEL STEAM CONDENSER MODEL

HF, HH GB, GD

K2G51000090

K2G51000125

K2G71000090

K2G71000125

29168A

29168B

29168C

29168D

HF, HH

GB, GD

HB, HD

KG81250090

K2G71250125

31168B

31168C

31168D

JF, JG, JH JB, JD

KG81620090

K2G71620125

KD71620090

KD71620125

35168B

35168C

35168D

TF, TG, TH TB, TD

KD71620090

KD71620125

KD71750090

KD71750125

33192B

33192C

33192D

VF, VH VB, VD

WF, WH VB, VD

20 JOHNSON CONTROLS

Top Mtd. Unit Dimensions - (Ft. - In.)

NOTES:

1. All dimensions are approximate. Certied dimensions are available on request.

2. Water nozzles can be located on either end of unit. Add 1/2" to nozzle length for anges connections.

3. Add 1-3/4" for neoprene pads or 3/4" if neoprene pads are not supplied.

4. Approx. overall shipping height to top of compressor Casing. Steam condenser ships separately to job site.

STEAM INLET

NOTE 3

EVAPORATOR

CONDENSER

TURBINE

APPROX. OVERALL WIDTH

APPROX. OVERALL HEIGHT

STEAM

CONDENSER

PACKAGE

SEE NOTE 4

NOTE 3

J COMPRESSOR UNITS

J1 COMPRESSOR (H-G SHELLS)

KG STEAM TURBINE /

29168 STEAM CONDENSER

DIMENSION CODE

FT-InCHes

8'–11 1/4"

7'–10 1/2"

2'–2 1/4"

1'–9"

E W/4" STEAM INLET

6'–11 3/4"

E W/6" STEAM INLET

6'–10 1/2"

15'–9"

14'–0"

6'–8 1/4"

J W/4" STEAM INLET

1'–9 3/16"

J W/6" STEAM INLET

2'–2 3/16"

0'–3 3/4"

14'–7"

10"–0"

J2 COMPRESSOR

KG STEAM TURBINE /

31168 STEAM CONDENSER

SHELL CODE

H-G H-H

DIMENSION CODE

FT-InCHes FT-InCHes

8'–11 1/4" 9'–2"

7'–10 1/2" 8'–2 1/2"

2'–2 1/4" 2'–2 1/4"

1'–9" 1'–11'

E W/4" STEAM INLET

6'–11 3/4" 6'–14 3/4"

E W/6" STEAM INLET

6'–10 1/2" 6'–13 1/2"

15'–11" 16'–3"

14'–0" 14'–0"

6'–8 1/4" 6'–8 3/8"

J W/4" STEAM INLET

1'–9 3/16" 1'–9 3/16"

J W/6" STEAM INLET

2'–2 3/16" 2'–2 3/16"

0'–3 3/4" 0'–3 3/4"

14'–8 15/16" 15'–0 15/16"

10'–0" 10"–3"

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York YST Steam Turbine Centrifugal Chiller User guide

York YST Steam Turbine Centrifugal Chiller User guide

York YST Steam Turbine Centrifugal Chiller User guide

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