Model YVWA Water-Cooled Screw Compressor Liquid Chiller ...FORM 201.30-EG1 (112) Model YVWA Water-Cooled Screw Compressor Liquid Chiller with Variable Speed Drive Style A 200-300 Tons

FORM 201.30-EG1 (112)

Model YVWA Water-Cooled Screw Compressor Liquid Chiller with Variable Speed Drive

Style A

200-300 Tons702-1055 kW2 Compressor50 and 60 Hz

HFC-134a

FORM 201.30-EG1 (112)

2 JOHNSON CONTROLS

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ASHRAE 90.1 Compliant

Table of ContentsFORM 201.30-EG1 (112) ....................................................................................................................................................................................... 1Introduction ........................................................................................................................................................................................................... 3Ratings .................................................................................................................................................................................................................. 4

................................................................................................................................................................................... 5MicroComputer Control Center ........................................................................................................................................................................... 6Accessories and Options .................................................................................................................................................................................... 7Nomenclature........................................................................................................................................................................................................ 9Unit Components ................................................................................................................................................................................................ 10Dimensions - English - ASME & PED ............................................................................................................................................................... 12Dimensions - SI - ASME & PED ......................................................................................................................................................................... 15Dimension – Floor Layout (Neoprene Pad)- English & SI ............................................................................................................................... 18Dimension – Floor Layout (Spring Isolator) - English & SI ............................................................................................................................ 19Weights ................................................................................................................................................................................................................ 20Electrical Data ..................................................................................................................................................................................................... 21Power Wiring ....................................................................................................................................................................................................... 22Application Data ................................................................................................................................................................................................. 24Application Data ................................................................................................................................................................................................. 28

.......................................................................................................................................................................................... 30Unit Conversion .................................................................................................................................................................................................. 36

FORM 201.30-EG1 (112)

3JOHNSON CONTROLS

For over 135 years, Johnson Controls has raised the bar of chiller design and customer expectations. We are raising the bar again with a leap forward in water-cooled screw compressor chiller technology. Continuing the his-tory of innovation in both compressor design and variable speed drive (VSD) technology, Johnson Controls proudly introduces the YORK® YVWA.

The YORK YVWA chillers provide superior performance.

speed operation and smart controls elevate the system

YVWA is much greater than the sum of its parts.

cooled screw chillers. The design includes the latest

versus current products, YVWA sets the new standards for lowering energy use.

The YVWA was designed with the customer in mind. YVWA chillers are capable of providing a variety of cool-ing and heating applications and are compatible with open- or closed-circuit cooling towers, dry air coolers, or

for all applications.

YVWA lowers both direct and indirect impact on the environment. It uses R134a refrigerant which has zero ozone depletion potential (ODP). The design minimizes the quantity of refrigerant used in the system. Every YVWA model helps LEED projects earn the Energy and Atmosphere Credit 4. HVAC systems are one of the largest consumers of electricity in commercial buildings and the largest portion of green house gasses is created by carbon dioxide generated from electric power plants. YVWA chillers reduce the electricity usage, thereby con-tributing to reducing greenhouse gases and helping keep the planet cool.

The YVWA design is proven by years of success with the previous generation of YORK VSD water-cooled screw chillers with thousands of machines operating in more than one hundred countries. YVWA is configurable to be the perfect fit for your unique needs. YVWA offers an array of options that can

variations of condenser and evaporator arrangements, alternative compressor head ratios, sound reduction

requirements for your site.

Introduction

FORM 201.30-EG1 (112)

4 JOHNSON CONTROLS

The performance of the YORK YVWA chiller has been

-tions of the latest issue of AHRI Standard 550/590. Under

strict compliance with this Standard. This provides an

Each chiller is custom-matched to meet the individual building load and energy requirements. A variety 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

arrangement. Computerized ratings are available through

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

operating cost difference of over 30% due to differences

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

in the form of an Integrated Part Load Value (IPLV), and Non-Standard Part Load Value (NPLV).

The current IPLV/NPLV rating from AHRI Standard 550/590 much more closely tracks actual chiller opera-tion, and provides a more accurate indication of chiller performance than the previous IPLV/APLV rating. A more detailed analysis must take into account actual building

-mance data should be obtained for each job using its own design criteria.

Ratings

Rated in accordance with the latest issuance of AHRI Standard 550/590.

FORM 201.30-EG1 (112)

5JOHNSON CONTROLS

The direct-drive, semi-hermetic rotary twin-screw com-pressors incorporate advanced technology in a rugged design. The continuous function, microprocessor con-trolled VSD provides smooth capacity control from 100% down to 10% of chiller capacity. State-of-the-art screw compressor design and manufacturing ensures optimal

steps or slide valves in the compressors, the YVWA vari-able speed driven compressors have 50% fewer moving

screw compressors in the industry.

-

designed distribution system provides uniform refrigerant

The condenser is a shell and tube type, with a discharge

-

An integral sub-cooler is located at the bottom of the condenser shell providing highly effective liquid refrigerant

The YVWA has one independent refrigerant circuit per compressor. An electronic expansion valve (EEV), con-trolled by the unit panel, accommodates varying head and load conditions. The condenser shell is capable of storing the entire system refrigerant charge during ser-vicing. Optional service valves are available to facilitate the removal of refrigerant. The sub-cooling economizer (plate heat exchanger type), controlled by the unit panel, meters some refrigerant gas to the compressor to reduce energy consumption.

Each unit is shipped as a complete factory package, completely assembled with all interconnecting refrigerant

Prior to shipment, each individual chiller undergoes an extensive testing procedure, ensuring workmanship is the highest quality and that the initial start-up is trouble-free. Before leaving the factory, each refrigerant circuit is factory pressure tested, evacuated and then fully charged with R134a refrigerant and oil. An operational test is performed

to ensure each circuit functions correctly.

All controls and motor starting equipment necessary for unit operation are factory wired and function tested. There are no surprises at start-up; the unit will start up right the

point power connection and are supplied with a factory mounted and wired control transformer that powers all unit controls from the main unit power supply. The trans-former utilizes scheduled line voltage on the primary side and provides 115V/1Ø on secondary. The standard unit is equipped with terminal block electrical connections . All exposed power wiring is routed through liquid-tight, UV-stabilized, non-metallic conduit.

VSD Power/Control Panel includes main power connection(s), VSD contactors, current overloads, and factory wiring. All display and control features can be ac-cessed through the keypad and control display access door, eliminating the need to open the main cabinet doors.

The E-Link Gateway provides an economical and ver-satile connection between Johnson Controls equipment

communication protocols currently used by Johnson Controls equipment, exposing the data in a consistent,

output protocol, which reduces equipment connectivity startup time

FORM 201.30-EG1 (112)

6 JOHNSON CONTROLS

The microcomputer control center (Fig.1) provides au-tomatic control of chiller operation including compressor start/ stop and load/unload anti-recycle timers, chilled liquid pump, unit alarm contacts and run signal contacts. The microcomputer control center comes online as soon as the main power switch on the unit is switched on; im-mediately, the microcomputer control center will begin to continuously monitor all variables. The microprocessor controls the unit’s capacity by match-ing the actual leaving chilled liquid temperature (LCHLT)

system logic monitors the rate at which the LCHLT is ap-proaching the setpoint to ramp up or down compressor capacity as required. The variable frequency drive allows the compressor capacity to match the load.

Only)

Johnson Controls’ systems or another vendor’s systems can incorporate these setpoints and data outputs to give the customer a complete understanding of how the system is running through a Building Automation System.

- During extreme or unusual condi-tions the chiller control system will avoid shut-down by varying capacity. By monitoring motor current and suc-tion and discharge pressures, the chiller can maintain maximum available cooling output without shutting down.

Unit Safeties are provided for the chiller to perform auto-reset shut down for the following conditions:

– VIEW OF YORK CONTROL CENTER KEYPAD AND DISPLAY

MicroComputer Control Center

FORM 201.30-EG1 (112)

7JOHNSON CONTROLS

Accessories and Options

All options factory mounted unless otherwise noted.

-tic treatments on the refrigerant lines, compressors, and oil separators. There are several sound attenuation options available to further reduce sound at its source thereby meeting local sound level regulations.

Factory-

plastic type, 3/4” (19mm) thick is attached with vapor-proof

tube sheets, suction connection, and (as necessary) to the auxiliary tubing. Insulation can also be provided on the

such as heat recovery or heat pump duty. Not included is the insulation of water boxes and nozzles. This insulation will normally prevent condensation in environments with relative humidity up to 75% and dry bulb temperatures ranging from 50° to 90°F (10° to 32°C). 1-1/2” (38mm) thick insulation is also available for relative humidity up to 90% and dry bulb temperatures ranging from 50° to 90°F (10° to 32°C).

Double Thick (1-1/2”) insulation provided on the evaporator if desired, for spe-

– Provides contractor with the couplings best suited to tie into the chilled liquid piping; option can be selected separately for the evaporator and condenser. Options include:

-

available in 300 psig (20.6 barg)

ANSI/AWAA C-606 couplings, for applications where

mounted by contractor. Also available in 300 psig (20.6 barg).

– Two- and three-pass nozzle arrangements available only in pairs shown and for all shell codes. Any pair of condenser nozzles may be used in combination with any pair of evaporator nozzles.

– The standard evaporator is constructed with two chilled liquid passes through the evaporator. The three-pass option is recommended for

use in brine applications or where a greater liquid tempera-

– The standard condenser is constructed with two liquid passes through the condenser. The one-pass option is recommended

option is recommended for use in heat pump applications where high temperature differences are required. The one- or three-pass options allow for customized cooling

– Two- and three-pass nozzle arrangements available only in pairs shown and for all shell codes. Any pair of condenser nozzles may be used in combination with any pair of evaporator nozzles.

- - Factory installed option to accept a 4 to

20 mA or a 0 to 10 VDC input to allow remote reset of the Leaving Chilled Liquid Temperature Setpoint. The setpoint can be positively offset upwards up to 40°F (22.2°C). This option is useful for ice storage or process applications or for periods where higher chilled liquid temperatures are adequate for low loads. Available alone or in combination with BAS Load Limit.

- Factory installed option to accept a 4 to 20 mA or a 0 to 10 VDC input to allow remote reset of the Load Limit Setpoint. The setpoint can limit system demand from 30-100%. Available alone or in combination with BAS Temperature Reset.

– The E-Link gateway provides full communication

– Provides special control logic -

peratures below 40°F (4.4°C) primarily at times of low cool-ing load (night time). Option can be used to produce ice

costs. The capability of the chiller is enhanced by using both ice and chilled liquid simultaneously during times of peak cooling needs.

- Vapor proof SPDT,

250°F (-29°C to 121°C) with 1” NPT (IPS) connection

FORM 201.30-EG1 (112)

8 JOHNSON CONTROLS

Accessories and Options - continued

or equivalent must be furnished with each unit for chilled

– This 3-45 psig (0.2-3 barg) range switch, with 1/4” NPTE pressure con-

- Optional factory-installed isolation valves in the compressor discharge line and refrigerant liquid line per circuit are available. This allows isolation and storage of the refrigerant charge in the chiller condenser during servicing, eliminating time-consuming transfers to remote storage vessels. Both valves in each of the independent refrigerant circuits are positive shut-off, assuring integrity of the storage system.

- Special relief valves per Chicago code.

– Two safety relief valves are mounted in parallel; one is always operational to assist in valve replacement during maintenance.

– The evaporator and

– A unit-mounted circuit breaker with external lockable handle will be supplied to isolate the single point power voltage for servicing. The circuit breaker is sized to provide motor branch circuit protec-

tion, short circuit protection and ground fault protection for the motor branch-circuit conductors, the motor control apparatus and the motors.

– Unit-mounted disconnect switch(es) with external lockable handle can be supplied to isolate the unit power voltage for servicing. Separate external fusing must be supplied by the power wiring, which must comply with local codes.

There are two options to select from:

includes Pressure Vessel Report, Unit Run Test Re-port, Production System Check Sheet and Final Unit Inspection Check Sheet.

of chiller end-of-line run test in addition to the SRDP.

for vessels in addition to the SRDP.

– This option is recom-mended for normal installations. It provides very good performance in most applications for the least cost. Field mounted.

– Spring and cage type isolators for mounting under the unit base rails are available to sup-

may vary slightly by application.

FORM 201.30-EG1 (112)

9JOHNSON CONTROLS

1 2 3 4 5 6BASE PRODUCT TYPE EVAPORATOR

Y : York M : 3658 mm (12') shell

V : Variable N : 4268 mm (14') shell speed screw # : Tube diameter / quantity

W : Water cooled

A : Design series A

7 8 9 10CONDENSER COMPRESSOR

M : 3658 mm (12') shell E E : 136 mm /136 mm

N : 4268 mm (14') shell F E : 145 mm /136 mm

# : Tube diameter / quantity F F : 145 mm /145 mm

11 12 13 14 15 16

STARTER/PASS CAPACITY

# : Starter type # # # #

B 2 Pass Evap. - 1 Pass Cond.C 3 Pass Evap. - 1 Pass Cond.E 2 Pass Evap. - 2 Pass Cond.F 3 Pass Evap. - 2 Pass Cond.H 2 Pass Evap. - 3 Pass Cond.I 3 Pass Evap. - 3 Pass Cond.

17 18APPLICATION/LEVEL

# : Application

A : Modification Level A

YVWA M# M# EE #E #### #A

Nomenclature

FORM 201.30-EG1 (112)

10 JOHNSON CONTROLS

Unit Components

FORM 201.30-EG1 (112)

11JOHNSON CONTROLS

FORM 201.30-EG1 (112)

12 JOHNSON CONTROLS

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Dimensions - English - ASME & PED

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6. In order to achieve rated performance, condenser liquid must enter the water box through the bottom connection for proper operation of the sub-cooler.

7. Connected piping should allow for the removal of the compact water boxes for tube access and cleaning.

FORM 201.30-EG1 (112)

13JOHNSON CONTROLS

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sub-cooler.6. Connected piping should allow for the removal of the compact water boxes for tube access and cleaning.

FORM 201.30-EG1 (112)

14 JOHNSON CONTROLS

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FORM 201.30-EG1 (112)

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A 3658 4268B 1844 1844C 1405 1405

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6. In order to achieve rated performance, condenser liquid must enter the water box through the bottom connection for proper operation of the sub-cooler.

7. Connected piping should allow for the removal of the compact water boxes for tube access and cleaning.

FORM 201.30-EG1 (112)

16 JOHNSON CONTROLS

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FORM 201.30-EG1 (112)

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All Dimensions are in millimeters

FORM 201.30-EG1 (112)

20 JOHNSON CONTROLS

EEM-M 10,541 - 11,693 4,782 - 5,304 11,497 - 12,950 5,215 - 5,874 573 - 595 260 - 270 2,875 - 3,279 1,304 - 1,469N-N 12,180 - 12,450 5,525 - 5,647 13,251 - 13,880 6,011 - 6,296 617 - 639 280 - 290 3,314 - 3,370 1,503 - 1,574

FEM-M 10,610 - 11,762 4,813 - 5,335 11,566 - 13,019 5,246 - 5,905 584 - 606 265 - 275 2,892 - 3,254 1,312 - 1,476N-N 12,248 - 12,519 5,556 - 5,678 13,319 - 13,948 6,042 - 6,327 628 - 650 285 - 295 3,329 - 3,428 1,510 - 1,582

FFM-M 10,678 - 11,830 4,844 - 5,366 11,634 - 13,087 5,277 - 5,396 595 - 617 270 - 280 2,908 - 3,272 1,319 - 1,484N-N 12,317 - 12,587 5,587 - 5,709 13,388 - 14,017 6,073 - 6,358 639 - 661 290 - 300 3,347 - 3,503 1,518 - 1,589

NOTE: Weights shown for base unit; selected options and tube count variations may add weights and/or refrigerant charge quantity to unit. Contact your nearest Johnson Controls ales Of ce for weight data.

Weights

FORM 201.30-EG1 (112)

21JOHNSON CONTROLS

Electrical Data

FRAME

A

200 60 N/A N/A N/A N/A N/A N/A N/A N/A N/A230 60 N/A N/A N/A N/A N/A N/A N/A N/A N/A380 60 1 2 #2 AWG - 600kcmil 1 2 #2/0AWG-400KCMIL 1 2 #2 AWG - 600kcmil380 50 1 2 #2 AWG - 600kcmil 1 2 #2/0AWG-400KCMIL 1 2 #2 AWG - 600kcmil400 50 1 2 #2 AWG - 600kcmil 1 2 #2/0AWG-400KCMIL 1 2 #2 AWG - 600kcmil415 50 1 2 #2 AWG - 600kcmil 1 2 #2/0AWG-400KCMIL 1 2 #2 AWG - 600kcmil460 60 1 2 #2 AWG - 600kcmil 1 2 #2/0AWG-500KCMIL 1 2 #2 AWG - 600kcmil575 60 N/A N/A N/A N/A N/A N/A N/A N/A N/A

B

200 60 1 4 #2 AWG - 600kcmil 1 4 #4/0AWG-500KCMIL N/A N/A N/A230 60 1 4 #2 AWG - 600kcmil 1 4 #4/0AWG-500KCMIL N/A N/A N/A380 60 1 2 #2 AWG - 600kcmil 1 2 #1/0AWG-500KCMIL 1 2 #2 AWG - 600kcmil380 50 1 2 #2 AWG - 600kcmil 1 2 #1/0AWG-500KCMIL 1 2 #2 AWG - 600kcmil400 50 1 2 #2 AWG - 600kcmil 1 2 #1/0AWG-500KCMIL 1 2 #2 AWG - 600kcmil415 50 1 2 #2 AWG - 600kcmil 1 2 #1/0AWG-500KCMIL 1 2 #2 AWG - 600kcmil460 60 1 2 #2 AWG - 600kcmil 1 2 #1/0AWG-500KCMIL 1 2 #2 AWG - 600kcmil575 60 1 2 #2 AWG - 600kcmil 1 2 #1/0AWG-500KCMIL 1 2 #2 AWG - 600kcmil

C

200 60 N/A N/A N/A N/A N/A N/A N/A N/A N/A230 60 N/A N/A N/A N/A N/A N/A N/A N/A N/A380 60 1 3 #2 AWG - 600kcmil 1 3 #3/0AWG-400KCMIL 2 2 #2 AWG - 600kcmil380 50 1 3 #2 AWG - 600kcmil 1 3 #3/0AWG-400KCMIL 2 2 #2 AWG - 600kcmil400 50 1 3 #2 AWG - 600kcmil 1 3 #3/0AWG-400KCMIL 2 2 #2 AWG - 600kcmil415 50 1 3 #2 AWG - 600kcmil 1 3 #3/0AWG-400KCMIL 2 2 #2 AWG - 600kcmil460 60 N/A N/A N/A N/A N/A N/A N/A N/A N/A575 60 N/A N/A N/A N/A N/A N/A N/A N/A N/A200 60 N/A N/A N/A N/A N/A N/A N/A N/A N/A230 60 N/A N/A N/A N/A N/A N/A N/A N/A N/A380 60 1 3 #2 AWG - 600kcmil 1 4 #4/0AWG-500KCMIL 2 2 #2 AWG - 600kcmil380 50 1 3 #2 AWG - 600kcmil 1 4 #4/0AWG-500KCMIL 2 2 #2 AWG - 600kcmil400 50 1 3 #2 AWG - 600kcmil 1 4 #4/0AWG-500KCMIL 2 2 #2 AWG - 600kcmil415 50 1 3 #2 AWG - 600kcmil 1 4 #4/0AWG-500KCMIL 2 2 #2 AWG - 600kcmil460 60 1 3 #2 AWG - 600kcmil 1 3 #3/0AWG-400KCMIL 2 2 #2 AWG - 600kcmil575 60 1 2 #2 AWG - 600kcmil 1 2 #1/0AWG-500KCMIL 2 2 #2 AWG - 600kcmil

FORM 201.30-EG1 (112)

22 JOHNSON CONTROLS

Power Wiring

FORM 201.30-EG1 (112)

23JOHNSON CONTROLS

FORM 201.30-EG1 (112)

24 JOHNSON CONTROLS

The following discussion is a user’s guide in the applica-tion and installation of YVWA chillers to ensure the reliable, trouble-free life for which this equipment was designed. While this guide is directed towards normal, liquid-chilling applications, a Johnson Controls sales engineer can provide complete recommendations on other types of applications.

YVWA chillers are virtually vibration free and may gener-ally be located at any level in a building where the con-struction will support the total system operating weight.

which is level within 1/4” (6.4 mm) and capable of sup-porting the operating weight of the unit.

-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 and condenser tubes as required. A doorway or other properly located opening may be used.

The chiller should be installed in an indoor location where temperatures range from 40°F to 122°F (4.4°C to 50°C). The dew point temperature in the equipment room must be below the entering condenser liquid temperature to prevent condensing liquid vapor inside of the low volt-age VSD. Applications using cooling sources other than evaporative or closed loop air exchange methods need to request a factory-supplied temperature control valve to prevent condensation inside the VSD. Other areas susceptible to liquid vapor condensate are outside of the condenser shell and condenser water boxes. Example applications include cooling condenser liquid using chilled

-door applications, please contact your nearest Johnson

-mended, as it generally raises the energy consumption of the system by keeping the condenser pressure high in the chiller. Additionally, the rate of fouling in the condenser will increase at lower liquid velocities associated with variable

Ref. Table 1 &

(VPF) systems in large chilled liquid plants. VPF systems can offer lower installation and operating costs in many

monitoring.

YVWA chillers will operate successfully in VPF systems. With a minimum allowable evaporator tube velocity of 1.5 ft/sec (0.5 m/s) for standard tubes at part-load rating condi-tions, YVWA chillers will accommodate the wide variation

minute that is typically associated with the staging on or off

is normally used for better system stability and set point control. Proper sequencing via the building automation system will make this a very smooth transition.

For normal liquid chilling duty, leaving chilled liquid temperatures may be selected be-tween 38°F and 60°F (3°C and 15.6°C) and condenser liquid temperatures may range from 65°F to 115°F (18°C to 46°C).

The practical and economical applica-tion of liquid chillers requires that the quality of the liquid supply for the condenser and evaporator be analyzed by a liquid treatment specialist. Liquid 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 liquid treatment and periodic cleaning of tubes. If liquid conditions exist which cannot be corrected by proper liquid treatment, it may be necessary to provide a larger allowance for fouling, and/ or to specify special materials of construction.

All chilled liquid and condenser liquid piping should be designed and installed in accordance with accepted piping practice. Chilled liquid and condenser liquid pumps should be located to discharge through the

and should be arranged to prevent drainage of liquid 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 imposition 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.

To facilitate the perfor-mance of routine maintenance work, some or all of the following steps may be taken by the purchaser. Evaporator and condenser 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 condenser and chilled liquid line as close as possible to the chiller.

Application Data

FORM 201.30-EG1 (112)

25JOHNSON CONTROLS

An overhead monorail or beam may be used to facilitate servicing.

The standard chiller is designed for 150 psig (10.3 barg) design working pressure in both the chilled liquid and condenser liquid circuits. The connec-tions (liquid nozzles) to these circuits are furnished with grooves to ANSI/AWWA C-606 Standard for grooved and shouldered joints. Piping should be arranged for ease of disassembly at the unit for tube cleaning. All liquid piping should be thoroughly cleaned of all dirt and debris before

A liquid strainer of maximum 1/8” (3.2

liquid inlet line as close as possible to the chiller. If located close enough to the chiller, the chilled liquid pump may be protected by the same strainer. The strainer is important to protect the chiller from debris or objects which could

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

rator nozzle and connected to the panel, which assures

The chiller is engineered for maxi-

by taking advantage of the colder cooling tower liquid temperatures which naturally occur during the winter months. Appreciable power savings are realized from these reduced heads.

At initial startup, entering condensing liquid temperature may be as much as 25°F (13.9°C) colder than the standby chilled liquid temperature.

meet the total capacity requirements as well as to provide

-ment shutdown. There are several common unit arrange-ments for this type of application. The YVWA chiller has been designed to be readily adapted to the requirements of these various arrangements.

(Refer to Fig. 2) Chillers may be applied in multiples with chilled and condenser liquid circuits connected in parallel between the units. Fig. 1 rep-resents a parallel arrangement with two chillers. Parallel chiller arrangements may consist of equally or unequally sized units. When multiple units are in operation, they will load and unload at equal percentages of design full load for the chiller.

Depending on the number of units and operating char-acteristics of the units, loading and unloading schemes

the chiller plant. It is recommended to use an evapora-

evaporator of any unit which has cycled off at reduced load conditions. It is also recommended to alternate the chiller cycling order to equalize chiller starts and run hours.

(Refer to Fig. 3) Chillers may be applied in pairs with chilled liquid circuits connected in series and condenser liquid circuits connected in parallel.

each unit handling approximately one-half of the total load. When the load decreases to a customer selected load value, one of the units will be shut down by a sequence

unit, that unit will cool the liquid to the desired temperature.

(Refer to Fig. 4, pg 32) - Chillers may be applied in pairs with chilled liquid circuits connected in series and with the condenser liquid

both condensers. The liquid ranges are split, which allows a lower temperature difference or “head” on each chiller, than multiple units in parallel. For equal chillers, the ma-chine at higher temperature level will typically provide slightly more than half the capacity.

building energy savings for large capacity plants which have chilled and condenser liquid temperature ranges greater than typical AHRI requirements.

The YVWA chiller is a good match for the high head re-quirements of low temperature glycol applications. This is particularly true of thermal ice storage systems, typi-cally requiring 14°F (-10°C) to 40°F (4.4°C) leaving brine temperatures. This performance is enhanced with the standard thermal storage control mode described in the Accessories and Options section (see pgs. 7 & 8).

Particular attention must be paid to the application of two or more chillers with evaporators in parallel or series when the brine temperature is below 32°F (0°C). The glycol

because it can cause the condenser liquid to freeze. A bypass or other type of arrangement I required that shuts

series with lead/leg capability, the units should be identical.

FORM 201.30-EG1 (112)

26 JOHNSON CONTROLS

The YVWA can act as a heat pump, extracting heat from

the chilled water loop, then hot gas will generate heat to make up the lack of source heat from the chilled loop.

load on the condenser (heating) side to carry away the heat of compression of the system. The design working pressure (DWP) of the condenser vessel is the limiting factor of the hot water production. If the load is less than the heat of compression load plus the refrigeration effect on the condenser side of the heat pump, the system will not be able to stay online. The total heat generated in the heat pump is not removed from the heating water loop and will accumulate causing a high pressure shutdown. Heat pump mode and chiller/heat recovery capacity con-trols operation are mutually exclusive operational modes. The chiller mode produces cold water at setpoint, and any

limiting factor and the heat pump will unload based on low water temperature or high discharge pressure.

Very simply, heat recovery allows the utilization of heat that would otherwise be “wasted” (to the cooling tower), to serve a useful purpose. This heat of rejection can be used to:

hospitals for use in laundry, showers, swimming pools, cooking/dishwashing, or hot tubs.

water.

Heat recovery may be used in buildings where there is a need for concurrent heating and cooling loads. Overall operating energy savings result from utilizing some or all of the heat rejection of a normal vapor-compression cycle cooling system. Heat recovery uses available heat as a by-product from the cooling function, which differs from heat pumps where the heating can be considered the primary process. Also, the heat recovery usage is often a winter seasonal duty, where the chiller may be expected to operate in summer using heat rejection to a conventional cooling tower. As heating loops and cooling tower water circuits are separate in the majority of build-ings, this dictates the need for two water circuits in the condenser of a heat recovery chiller.

The main difference between a cooling only chiller and a heat recovery chiller is in the heat recovery chiller’s added ability to reject the “free condenser heat” to the cooling

tower and/or the heating system. Since heat is being removed from the area to be cooled, the cooling load supports the heating load. There must be a simultaneous cooling and heating load in the building.

When using a VSD for a heat recovery application, the starters will be cooled by chilled water from the unit.

Each independent circuit is equipped with dual pressure relief valves on the condenser and dual relief valves on the evaporator, or a single relief valve on the evaporator if the optional refrigerant isolation valves are ordered. Refer to Table 3. The dual relief valves on the 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 internal pressure as noted on the pressure vessel data plate, and are provided in accordance with ASHRAE 15

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

connection.

A YVWA chiller is not a source of objectionable sound and vibration in normal air conditioning applications. Optional neoprene isolation mounts are available with each unit to reduce vibration transmission. Optional level-adjusting spring isolator assemblies designed for 1” (25 mm) static

YVWA 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 con-struction as well as in the selection and installation of the equipment.

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

can be factory-insulated with 3/4” (19 mm) or 1-1/2” (38 mm) thick insulation, as an option. This insulation will normally prevent condensation in environments with dry

Application Data

FORM 201.30-EG1 (112)

27JOHNSON CONTROLS

bulb temperatures of 50°F to 90°F (10°C to 32°C) and rela-tive humidity up to 75% [3/4” (19 mm) thickness] or 90% [1-1/2” (38 mm) thickness]. The insulation is painted and

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.

Refrigeration requires that all machinery rooms be vented to the outdoors utilizing mechanical ventilation by one or more fans. This standard, plus National Fire Protection Association Standard 90A, state, local and any other re-

Since the YVWA chiller motor is hermetically sealed, no additional ventilation is needed due to motor heat.

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 activated and the mechanical ventilation started at a value no great-er than the TLV (Threshold Limit Value) of the refrigerant.

Unit input conductor size must be in accordance with the National Electrical Code (N.E.C.), or other applicable codes, for the unit full load amperes (FLA). Please refer

-

conduit should be used for the last several feet to the chiller in order to provide vibration isolation. Table 4 lists the allowable variation in voltage supplied to the chiller. The unit nameplate is stamped with the unit voltage, and frequency.

A separate starter is not required since the YVWA chiller is equipped with a factory installed unit mounted VSD.

VSD is factory installed as standard. The chiller including VSD is completely controlled by the control panel.

Only copper conductors should be connected to compressor motors and starters. Aluminum conductors have proven to be unsatisfactory when con-nected to copper lugs. Aluminum oxide and the difference in thermal conductivity between copper and aluminum cannot guarantee the required tight connection over a long period of time.

The VSD pro-vides automatic displacement power-factor correction to a minimum of 0.95 at all operating conditions, so additional capacitors are not required.

The branch circuit overcurrent protection device(s) should be a time-delay type, with a minimum rating equal to the next stan-dard fuse/breaker rating above the calculated value. Refer

each application.

FORM 201.30-EG1 (112)

28 JOHNSON CONTROLS

Application Data

CONDITIONS

230 910 160 600 470 1850 240 920 160 610290 1140 190 750 550 2190 280 1090 190 720330 1310 220 870 610 2420 310 1200 210 800380 1490 250 980 720 2840 360 1420 240 940230 890 150 580 460 1820 230 890 160 600270 1050 180 690 560 2220 280 1100 190 740310 1230 210 800 660 2600 330 1300 220 850

370 1460 250 960 750 2960 380 1480 250 980

PARALLEL EVAPORATORS PARALLEL CON-DENSERS

SERIES EVAPORATORS PARALLEL CON-DENSERS

S – Temperature Sensor for Chiller Capacity Control

– Thermostat for Chiller Capacity Control

COND. 1 COND. 2

EVAP. 1 EVAP. 2

T S1 S2

S – Temperature Sensor for Chiller Capacity Control

– Thermostat for Chiller Capacity Control

SERIES EVAPORATORS SERIES-COUNTER FLOW CONDENSERS

COND. 1

COND. 2

EVAP. 1

EVAP. 2

T

S1

S2

COND. 1 COND. 2

EVAP. 1 EVAP. 2

T S1 S2

FORM 201.30-EG1 (112)

29JOHNSON CONTROLS

VOLTAGE VARIATIONS

60Hz

200 180 220230 207 253380 342 403575 518 633460 414 506

50Hz380 342 403400 360 440415 374 457

(1-1/4-12UNF-2B) SINGLE

235 psig (16.2 bar)

33.7 lb. Air/min (0.255 kg Air/sec)

(1-1/4-12UNF-2B) DUAL

235 psig (16.2 bar)


(1-1/4-12UNF-2B) DUAL

235 psig (16.2 bar)


(1-1/4-12UNF-2B) DUAL

388 psig (26.75 bar)


(1-1/4-12UNF-2B) DUAL

388 psig (26.75 bar)


(1-1/4-12UNF-2B) DUAL

388 psig (26.75 bar)


(1-1/4-12UNF-2B) SINGLE

388 psig (26.75 bar)


(1-1/4-12UNF-2B) DUAL

388 psig (26.75 bar)

54.4 lb. Air/min (0.411 kg Air/sec) NONE

(1-11-1/2NPT-2B) SINGLE

388 psig (26.75 bar)


(1-11-1/2NPT-2B) DUAL

388 psig (26.75 bar)

90.3 lb. Air/min (0.683 kg Air/sec) NONE

CONDITIONS

15 57 10 38 30 117 15 58 10 3818 72 12 47 35 138 18 69 12 4521 83 14 55 38 153 20 76 13 5024 94 16 62 45 179 23 90 15 5915 56 9 37 29 115 15 56 10 3817 66 11 44 35 140 18 69 12 4720 78 13 50 42 164 21 82 14 5423 92 16 61 47 187 24 93 16 62

FORM 201.30-EG1 (112)

30 JOHNSON CONTROLS

The requirements of this Section shall conform to the general provisions of the Contract, including General and Supplementary Conditions, Conditions of the Contract, and Contract Drawings.

-sor, water-cooled, liquid chillers of the scheduled capaci-ties as shown and indicated on the Drawings, including but not limited to:

A. Chiller packageB. Charge of refrigerant and oilC. Electrical power and control connectionsD. Chilled liquid connectionsE. Condenser liquid connections

A. Products shall be Designed, Tested, Rated and Certi-

with applicable sections of the following Standards and Codes:1. AHRI 550/590 – Water Chilling Packages Using

the Vapor Compression Cycle.

Sound Within an Equipment Space.

Refrigeration.4. ANSI/ASHRAE 34 – Number Designation and

5. ASHRAE 90.1 – Energy Standard for Buildings Except Low-Rise Residential Buildings.

6. ANSI/NFPA 70 – National Electrical Code (N.E.C.).

VIII, Division 1.8. OSHA – Occupational Safety and Health Act.

10. Conform to Intertek Testing Services for con-struction of chillers and provide ETL/cETL Listed

B. Factory Run Test: Chiller shall be pressure-tested, evacuated and fully charged with refrigerant and oil,

and shall be factory operational run tested with water

C. Chiller manufacturer shall have a factory trained and supported service organization.

and material of its manufacture against defects in workmanship and material for a period of eighteen (18) months from date of shipment or twelve (12)

A. Unit shall be delivered to job site fully assembled with all interconnecting refrigerant piping and internal

B. Provide protective covering over vulnerable compo-nents for unit protection during shipment. Fit nozzles and open ends with plastic enclosures.

instructions.

A. The design shown on the Drawings is based on YORK model YVWA chiller manufactured by Johnson Con-trols / YORK. Alternate equipment will be acceptable if the manufacturer’s equipment meets the scheduled

If equipment manufactured by a manufacturer other

Contractor shall be responsible for coordinating with the General Contractor and all affected Subcontrac-tors to insure proper provisions for installation of the furnished unit. This coordination shall include, but not be limited to, the following:1. Structural supports for units. 2. Piping size and connection/header locations. 3. Electrical power requirements and wire/conduit

and overcurrent protection sizes.4. Chiller physical size on plant layout.5. Site noise considerations.

costs incurred by the General Contractor, Subcontrac-tors, and Consultants to modify the building provisions to accept the furnished alternate equipment.

FORM 201.30-EG1 (112)

31JOHNSON CONTROLS

A. Description: Furnish, Install, and Commission fac-tory assembled, charged, and operational run tested

herein and shown on the Drawings. Chiller shall in-clude, but is not limited to:, semi hermetic twin screw

lubrication system, interconnecting wiring, safety and operating controls including capacity controller, control center, motor starting components, and spe-

automatic operation. A complete system with multiple inde-

pendent refrigerant circuits.

B. Operating Characteristics: 1. Chiller will be installed in an indoor location and

shall be capable of operating in room tempera-tures between 40°F and 104°F (4.4°C and 40°C).

2. Provide capacity control system capable of reducing unit capacity to 20% of full load. Compressor shall start in unloaded condition. Application of factory installed hot gas bypass

minimum load.

C. Chiller shall be completely factory-packaged including evaporator, condenser, compressor, motor, control center and all interconnecting unit piping and wiring. The complete chiller assembly shall be painted to meet 500 hour salt spray test in accordance with the

D. Shipping: Unit shall ship in one piece and shall require installer to provide the evaporator and condenser inlet and outlet pipe connections. If providing chiller model that ships in multiple pieces, bid shall include all the

personnel to connect the pieces as well as all inter-connecting piping and wiring.

A. Compressors: Shall be direct drive, semi hermetic, rotary twin-screw type, including: terminal box, and precision machined cast iron housing. Design working pressure of entire compressor, suction to discharge, shall be 450 psig (31 barg) or higher. Compressor shall be U.L. recognized.

accessible hermetic compressor motor, full suction -

nal thermal protection and external current overload on all three phases.

C. Balancing Requirements: All rotating parts shall be statically balanced.

D. Lubrication System: External oil separators with no moving parts, 388 psig (26.8 barg) design working pressure, and CE listing shall be provided on the chiller. Refrigerant system differential pressure shall

-

less restrictive media, or oil pump not acceptable.

E. Capacity Control: Compressors shall start at minimum

compressor capacity to balance compressor capacity with cooling load.

according to ASHRAE 34.

B. Each refrigerant circuit shall incorporate an electronic expansion valve controlled by the control center to

-modate varying head and load conditions.

C. Equipment supplied shall comply with LEED Energy

-agement.

D. Each refrigerant circuit shall incorporate all compo-nents necessary for the designed operation.

Chiller manufacturer shall provide an independent circuit for each compressor to provide maximum redundancy during chiller operation. If equipment does not have independent circuits per compressor, manufacturer shall provide owner one spare compressor of each unique size.

Refrigerant isolation valves shall be provided to isolate the referent into the condenser.<</

A. Evaporator:1. Evaporator shall be shell and tube, hybrid falling

FORM 201.30-EG1 (112)

32 JOHNSON CONTROLS

-hanced type copper tubes with 0.035” (0.89 mm) minimum wall thickness at all intermediate tube supports to provide maximum tube wall thickness at the support area. Each tube shall be roller expanded into the tube sheets providing a leak proof seal, and be individually replaceable.

3 pass arrangement. Independent refrigerant circuits

shall be provided per compressor2. Constructed, tested, and stamped in accordance

-sel code for mini-mum 235 psig (16 barg) refrig-erant side design working pressure and 150 psig (10 barg) liquid side design working pressure.

3. Water boxes shall be removable to permit tube cleaning and replacement. Liquid nozzle con-nections shall be ANSI/AWWA C-606. Com-

included. 150 psig (10.3 barg) ANSI raised-

and gaskets are not included. 150 psig (10.3 barg) ANSI raised-

and gaskets are not included.

B. Condenser:1. Condenser shall be shell and tube type, with a

-ity impingement on the tubes and to distribute

integral sub-cooler shall be located at the bottom of the condenser shell providing highly effective liquid refrigerant subcooling and highest cycle

2. Constructed, tested, and stamped in accordance

vessel code for minimum 388 psig (26.8 barg) refrigerant side design working pressure and 150 psig (10 barg) liquid side design working pressure.

3. Water boxes shall be removable to permit tube cleaning and replacement. Liquid nozzle con-nections shall be ANSI/AWWA C-606. Com-

included. 150 psig (10.3 barg) ANSI raised-

and gaskets are not included. 150 psig (10.3 barg) ANSI raised-

-

included.4. Connection location: Chilled liquid inlet and outlet

nozzle connections shall be located as shown on schedule.

insulation in sheet and tubular form.

B. Thickness: 3/4” (19mm.) 1-1/2” (38mm.) 3/4” (19mm) for condenser with heat

recovery / heat pump option only. 1-1/2” (38mm) for condenser with heat

recovery / heat pump option only.

C. Thermal conductivity: 0.26 (BTU/HR-Ft2-°F/in) maxi-mum at 75°F mean temperature.

D. Factory-applied insulation over cold surfaces of liquid chiller components including evaporator shell and suction line. Liquid nozzles and water boxes shall be insulated by Contractor after pipe installation.

E. Adhesive: As recommended by insulation manufac-turer and applied to 100 percent of insulation contact surface including all seams and joints.

A. Provide unweighted sound power or sound pressure level data in decibels (dB) at the scheduled eight (8) octave band center frequencies. A-weighted sound data alone is not acceptable.

B. Provide all sound power or sound pressure level data at 100%, 75%, 50%, and 25% load.

C. Supplied equipment shall not exceed scheduled sound power or sound pressure level data at any load point. The mechanical Contractor shall be responsible for any additional costs associated with equipment deviation.

FORM 201.30-EG1 (112)

33JOHNSON CONTROLS

D. Acoustical performance shall be evaluated in accor-dance with AHRI Standard - 575 test data.

Provide factory-installed sound reduc-tion treatment to meet chiller sound levels scheduled at all load points.

A. Power/Control Panel:-

der painted steel cabinets with tool lockable, hinged, latched, and gasket sealed outer doors equipped with door latch. Provide main power connection(s), compressor starters, current overloads, and factory wiring.

B. Single Point Power:1. Provide single point power connection to chiller,

shall be 3 phase of scheduled voltage.2. Terminal Block connections shall be provided at

the point of incoming single point connection for

compressors. Separate Circuit/Branch Circuit and Ground Fault protection must be supplied, by others, in the incoming power wiring, which must comply with local codes.

Single Point Disconnect: A non-fused disconnect and lockable external handle shall be supplied to isolate the unit power volt-age for servicing. Separate Short Circuit/Branch Circuit and Ground Fault protection must be supplied, by others, in the incoming power wiring which must comply with local codes.

Single Point Circuit Breaker: A unit-mounted Circuit Breaker with external lock-able handle shall be supplied to isolate power voltage for servicing. Incoming power wiring must comply with local codes. Circuit breaker shall be sized to provide chiller equipment with the branch circuit protection, short circuit protec-tion.

C. Control Transformer: Power panel shall be supplied with a factory mounted and wired control transformer that will supply all unit control voltage from the main unit power supply. Transformer shall utilize scheduled line voltage on the primary side and provide 115V/1Ø on secondary.

D. Short Circuit Withstand Rating of the chiller electrical enclosure shall be (380, 400, & 460V: minimum of 30,000 Amps [OR 65,000 Amps for Single Point Circuit Breaker].) Rating shall be published in accordance with UL508.

inrush current (Variable Frequency Drives) or reduced inrush type (Closed transition Wye-Delta or Solid State) for minimum electrical inrush. Open transition Wye-Delta and Across the Line type starters will not be acceptable.

F. Power Factor:1. Provide equipment with power factor correction

capacitors as required to maintain a displace-ment power factor of 95% at all load conditions.

2. The installing contractor is responsible for ad-ditional cost to furnish and install power factor correction capacitors if they are not factory mounted and wired.

G. All exposed power wiring shall be routed through liquid-tight non-metallic conduit.

H. Supplied equipment shall not exceed scheduled

Contractor shall be responsible for any additional costs associated with equipment deviation.

A. General:1. Provide automatic control of chiller operation

including compressor start/stop and load/unload, anti-recycle timer, evaporator pump, condenser pump, evaporator heater, condenser heater, unit alarm contacts and run signal contacts.

2. Chiller shall automatically reset to normal chiller operation after power failure.

Heat pump shall automatically reset to normal heat pump operation after power failure.

3. Unit operating software shall be stored in non-volatile memory. Field programmed set points shall be retained in lithium battery backed regu-lated time clock (RTC) memory for minimum 5 years.

4. Alarm controls shall be provided to remote alert for any unit or system safety fault.

FORM 201.30-EG1 (112)

34 JOHNSON CONTROLS

B. Display and Keypad: 1. Provide minimum 80 character liquid crystal

display that is both viewable in direct sunlight and has LED backlighting for nighttime viewing. Provide one keypad and display panel per chiller.

2. Display and keypad shall be accessible without opening main control/electrical cabinet doors.

3. Display shall provide a minimum of unit setpoints, status, electrical data, temperature data, pres-sures, safety lockouts and diagnostics without the use of a coded display.

4. Descriptions in English (or available language

units. 5. Sealed keypad shall include unit On/Off switch.

Display language, chilled liquid cooling mode, local/remote control mode, display units mode, system lead/lag control mode, remote temperature reset, remote current limit, remote heat recovery kit, leaving chilled liquid setpoint and range, maximum remote temperature reset.

Leaving condenser liquid setpoint and range for heat pump application

Hot water setpoint and range for heat recovery application

D. Display Data: Chilled liquid leaving and entering -

rator/condenser pump status; active remote control; evaporator pressure, discharge, and oil pressures, condenser and economizer pressures per refriger-ant circuit; economizer temperature and superheat; subcooler liquid temperature and superheat; com-pressor discharge temperature and superheat, motor; temperatures, educator temperature, per refrigerant circuit; compressor speed, condenser level, con-denser level control valve; economizer superheat; economizer feed valve percentage open, evaporator/condenser heater status; oil pump status; compressor number of starts; run time; operating hours; evapora-tor and condenser heater status; history data for last ten shutdown faults; history data for last 20 normal (non-fault) shutdowns.

Condenser liquid leaving and enter-ing temperatures, unit hot water temperature, heat

recovery application.

E. Predictive Control Points: Unit controls shall avoid safety shutdown when operating outside design con-

ditions by optimizing the chiller controls and cooling load output to stay online and avoid safety limits be-ing reached. The system shall monitor the following parameters and maintain the maximum cooling output possible without shutdown of the equipment: motor current, evaporator pressure, condenser pressure, discharge pressure, starter internal ambient tempera-ture, and starter baseplate temperature.

F. System Safeties: Shall cause individual compressor systems to perform auto-reset shut down if: high discharge pressure or temperature, low evaporator pressure, low motor current, high/low differential oil pressure, low oil level, low discharge and economizer superheat, smart freeze point protection, high motor temperature, system control voltage, educator clog.

G. Unit Safeties: Shall be automatic reset and cause compressors to shut down if:, low leaving chilled liquid

chiller manufacturer requirements.

-

necessary to interface sensors to the chiller control system.

Some accessories and options supersede standard product features. All options are factory-mounted unless otherwise noted.

A. CONTROLS OPTIONS:1. Building Automation System Interface: Chiller

to accept 4 to 20mA or 0 to 10 VDC input from BAS (by others) to reset the leaving chilled liquid temperature or load limit setpoint or both.

2. Gateway: Provides communication for Building

-

3. Thermal Storage: Provide special control logic

brine temperatures below 40°F (4.4°C.)

FORM 201.30-EG1 (112)

35JOHNSON CONTROLS

B. GENERAL OPTIONS:1. Flow Switch: Vapor proof SPDT\ switch, 150 psig

(10.3 barg), -20°F to 250°F (-28.9°C to 121.1°C.)

2. Differential Pressure Switch: 3-45 psig (0.2-3 barg) range with 1/4” NPTE pressure connec-

3. Chicago Code Relief Valve – Special relief valves per Chicago Code.

4. Special Requirement Documents:

a. Special Requirement Document Package (SRDP) includes Pressure Vessel Report, Unit Run Test Report, Production System Check Sheet and Final Unit Inspection Check Sheet.

-rial reports for vessels in addition to Pres-sure Vessel Report, Unit Run Test Report, Production System Check Sheet and Final Unit Inspection Check Sheet.

Contractor):

a. Elastomeric Isolators.

-able, spring and cage type isolators for mounting under the unit base rails.

A. General: Rig and Install in full accordance with

Contract documents.

B. Location: Locate chiller as indicated on drawings, including cleaning and service maintenance clearance

on support structure.

C. Components: Installing Contractor shall provide and install all auxiliary devices and accessories for fully operational chiller.

D. Electrical: Coordinate electrical requirements and con-nections for all power feeds with Electrical Contractor.

E. Controls: Coordinate all control requirements and connections with Controls Contractor.

F. Finish: Installing Contractor shall paint damaged and

Values provided in this manual are in the English inch-pound (I-P) system.

To convert degrees Fahrenheit (°F) to degrees Celsius (°C), subtract 32° and multiply by 5/9 or 0.5556.

To convert a temperature range (i.e., 10°F or 12°F chilled water range) from Fahrenheit to Celsius, multiply by 5/9 or 0.5556.

in kW / ton:

kW / ton = kW input tons refrigerant effect

COP = kW refrigeration effect kW input

kW / ton and COP are related as follows:

kW/ton = 3.516 COP

COP = 3.516 kW/ton

2 2

0.0001 .0180.00025 .0440.0005 .088

0.00075 .132

Unit Conversion

TONS REFRIGERANT EFFECT (TON) 3.516 KILOWATTS (KW)KILOWATTS (KW) NO CHANGE KILOWATTS (KW)

HORSEPOWER (HP) 0.7457 KILOWATTS (KW)GALLONS / MINUTE (GPM) 0.0631 LITERS / SECOND (L/S)

FEET (FT) 304.8 MILLIMETERS (MM)INCHES (IN) 25.4 MILLIMETERS (MM)

POUNDS (LB) 0.4536 KILOGRAMS (KG)FEET / SECOND (FPS) 0.3048 METERS / SECOND (M/S)

FEET OF WATER (FT) 2.989 KILOPASCALS (KPA)

POUNDS / SQ. INCH (PSI) 6.895 KILOPASCALS (K PA)

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