na08539a hydrociat lw - · pdf filewater cooled chillers hydrociat lw r407c air conditioning -...

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7CWater cooled chillers

1AIR CONDITIONING - HEATING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 08.539 B

USE

HYDROCIAT LWThe HYDROCIAT LW screw compressor water cooledchillers are designed for indoor installation and offer anoptimal solution for any refrigeration application in the airconditioning or industrial process.

Units conform to regulations EN 60.204 EN 378-2 and todirectives :

- Machine (98 / 37 CEE) modified

- CEM (89 / 336 CEE) modified 92/31 CEE - 93/68 CEE

- Low voltage (73/23 CEE) modified 92/31 CEE - 93/68 CEE

- DESP 97 / 23 CEE

➝ LW - LWP

group 3 sizes 1200BZ (HPS) to 2800BZ (HPS)

group 4 sizes 3200BZ HPS to 4200BZ HPS

➝ LWN outside PED (split unit)

HYDROCIAT LW-LWP2 compressors - 2 refrigerant circuits

12 models : LW - LWP 1200BZ - 1200BZ HPS - 1500BZ - 1500BZ HPS -1800BZ - 1800BZ HPS - 2150BZ - 2150BZ HPS - 2500BZ - 2500BZ HPS - 2800BZ - 2800BZ HPS.

3 compressors - 3 refrigerant circuits

4 models : LW - LWP 3200BZ HPS - 3400BZ HPS - 3750BZ HPS - 4200BZ HPS.

HYDROCIAT LWNThe HYDROCIAT LWN chilled water production unitswithout condenser are designed to be connected to air orwater cooled condensers.

They can be connected to several models of our range of aircooled condensers EUROPA 2C.

12 models : LWN 1200BZ - 1200BZ HPS - 1500BZ - 1500BZ HPS -1800BZ - 1800BZ HPS - 2150BZ - 2150BZ HPS - 2500BZ - 2500BZ HPS - 2800BZ - 2800BZ HPS.

HYDROCIAT LWPThe design of the HYDROCIAT LWP water/water heat pumprange is identical to HYDROCIAT LW.

These machines provide solutions for a wide range of heatingproblems.

They can also be used in cooling operation by reversing thecycle on the hydraulic circuits.

RANGE

Cooling capacity : 270 to 1140 kWHeating capacity : 350 to 1420 kW

Screw compressorsCIAT dry direct expansion shell and tubes evaporator

HPS equipment(High Power System)

Heat recovery

cooling or heating

HFC R407C

ENVIRONMENTALLY FRIENDLY

PR

OTECTION DE L'ENVIRONNEM

ENT

AIR CONDITIONING - HEATING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 08.539 B

HYDROCIAT LW R407C

2

Water cooled chillers

HYDROCIAT LW - LWP

■ Compressors

■ Accessible hermetic twin screw type

■ Optimized profile of rotors ensuring high efficiency

■ Electrical motor incorporated with part winding start

■ Integral electronic protection fo motor

■ Control of the phases balance and rotation direction

■ Integrated overpressure valve

■ Discharge temperature control

■ Lubrication under controlled pressure

■ 3-stage integrated oil separator

■ Crankcase heater

■ Thin filter at intake

■ Discharge valve

■ Slide for modulating continued output capacity control

■ Assembly on antivibration mounts

■ Integrated oil separator

■ Installed at the compressor discharge

■ The large amount of oil injected during the compressioncycle necessitates the use of an oil separator.

■ Oil, after separation from the refrigerant, is filtered beforebeing injected into the compressor.

Note :

The refrigerant oil has several important roles to ensure thesmooth running of the compressor. It :

■ Lubricates bearings and moving parts and eradicates anydirect contact between parts.

■ Ensures a secure tightness between the different mechanicalparts, thereby guaranteeing good volumetric output.

■ Cools the compressor by direct oil injection into the gasvolume being compressed.

If required, the cooling of oil allows gas discharge temperature to be limited.

■ Evaporator

■ High performance copper tubes bundle

■ Steel tubular plates

■ Steel shell

■ Corrosion-resistant baffles

■ Thermal insulation with polyurethane foam

■ Water cooled condenser

■ High performance copper tubes bundle

■ Carbon steel shell

■ Carbon steel tubular plates

■ Removable cast iron headers

■ Safety valves on the refrigerant circuits

■ HPS (High Power System)

on LW/LWP/LWN...HPS models

■ The HPS system allows a significant increase in the coolingcapacity, improving the performance coefficients (EER) of yourinstallation, particulary in part load, and therefore ensuring anoptimal operation of the unit all year round.

■ Refrigerant accessories

■ Filter dryers with rechargeable cartridges

■ Liquid sight glasses

■ Solenoid valves on liquid refrigerant lines

■ Thermostatic expansion valves

■ Discharge check valves (LWN)

■ Electrical panel

■ IP 21

■ Electrical supply 400 V - 3 ph. - 50 Hz + earth (-5% / +4%)

■ Main fused isolator with outside handle

■ Transformer for control circuit

■ Compressor motors contactors

■ Compressor motors protection by fused isolators.

■ General earth connection

■ Phase controller (reversal, loss, over and under voltage)

■ Electronic module with XTRA CONNECTmicroprocessor

with the following main functions :

- 2 remote switchable set points

- chilled water temperature control

- Possibility of water temperature variation according to theoutside temperature (water law)

- Low temperature ice storage control

- Compressors discharge temperature control

- Compressors anti-short cycle control

- Control and optimisation of operating parameters

- Counting and balancing of compressors operating time

- Automaticity control

■ LCD display panel, 2 lines of 20 characters allowing :

- parametering of the unit

- direct reading of all information: settings, water inlet/outlet temperatures, outside temperature, HP/LPpressures, unit operating status...

- Faults control with memorization of the last 9 faults and operating reading of when those faults occured

- Weekly management of the unit

- Unit general fault display on terminals

- Automaticity control on terminals

- RS 485 output for bus connection with centralized BuildingManagement System

DESCRIPTION

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■ Safety and regulation controls

■ HP/LP pressure sensors

■ Low and high pressure safety valves

■ Chilled water control sensor (inlet or outlet)

■ External temperature sensor

■ Evaporator antifreeze sensor

■ Compressors discharge sensor

■ Evaporator water flow switch

■ Capacity control

■ Modulating capacity control :

- fom 25 to 100 % (Sizes 1200BZ (HPS) to 2800BZ (HPS)).

- from 17 to 100 % (Sizes 3200BZ HPS to 4200BZ HPS).

HYDROCIAT LWNThe HYDROCIAT LWN range of water chillers withoutcondenser is derived from the HYDROCIAT LW.

These units can be connected either to water or air cooledcondensers.They can be combined with several models of ourEUROPA 2C air cooled condensers range (see technicalbrochure).

HYDROCIAT LWN are supplied with a nitrogen safetyrefrigerant charge.

■ Accessories

■ Identical to those of the HYDROCIAT LW

HYDROCIAT LWPThe HYDROCIAT LWP water-water heat pump range has thesame design as the HYDROCIAT LW.

The calories are taken from the natural water network (groundwater, ...) or from a water loop and are sent to the heatingnetwork through the thermodynamic circuit, instead of beingdischarged by a cooling tower as is the case with the waterchiller.

These water-water heat pumps can be used for cooling byreversing the cycle on the water circuits (modification of thehydraulic circuits to be made on site).

■ Accessories

■ Identical to those of the HYDROCIAT LW

OPTIONS

HYDROCIAT LW - LWP - LWN■ LOW NOISE version : acoustically lined housingcompressors

■ Antivibration equipment :

- antivibration mounts

- evaporator flexible sleeves

- condenser flexible sleeves (LW - LWP)

- refrigerant flexible sleeves (LWN)

■ Compressor isolating suction valves

■ Condenser water headers

■ Heating recovery with brazed plates desuperheaters (1 foreach refrigerant circuit - LW - LWP only)

■ Low temperature glycol water

■ Electronic expansion valve

■ Progressive soft start

■ Reduced height version

■ Remote control unit

■ Voltage-free contact relay board

■ Management of several units - MULTICONNECT(LW - LWP only)

■ LonWorks gateway

■ Shackles

■ Discharge pressure control valves (LWN split - systemunit): necessary if the unit has to run for external air temperature below 12°C or if the unit has to start for watertemperature below 20°C on condenser side (one valve oneach refrigerant circuit).

These valves are fitted on the unit for sizes 1200BZ (HPS)to 1800BZ (HPS) and delivered separately (to be fitted onsite by customer) for sizes 2150BZ (HPS) to 2800BZ (HPS).

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HYDROCIAT LW - LWN - LWP 1200BZ1200BZ

HPS1500BZ

1500BZHPS

1800BZ1800BZ

HPS2150BZ

2150BZHPS

LW - LWP versionCooling capacity (1) kW 266 285 346 368 428 460 521 555Absorbed power (3) kW 79 82 98 101 119 123 137 142EER/ESEER 3.36/4.28 3.48/4.34 3.53/4.54 3.65/4.64 3.57/4.5 3.72/4.66 3.78/4.44 3.91/4.56

LWN versionCooling capacity (2) kW 270 291 348 374 432 466 512 551Absorbed power (3) kW 80 82 101 104 122 126 145 150

Compressor

Type Hermetic twin screwNumber 2Rotation speed rpm 2900

R407C refrigerant charge (4) kgcirc.1 20 23 34 34 34 40 61 61circ.2 20 23 26 28 35 40 42 42

Capacity controlModulating from 25 to 100%

(50 to 100% on each compressor)Type of oil for R407C BITZER BSE 170Oil charge for compressor liters 2 x 9 15 + 9 2 x 15 22 + 15

Evaporator

Type Shell and tubes with dry expansionNumber 1Water capacity liters 68 85 140Hydraulic connections VICTAULIC typeMaximum pressure on water side bar 10Mini / maxi water flow m3/h 30 / 100 40 / 110

Water cooledcondenser

Type Shell and tubesNumber 2Water capacity liters 2 x 25 2 x 36 49 + 36Hydraulic connections VICTAULIC typeMaximum pressure on water side bar 10Maximum water flow m3/h 192 200

LWN liquid receiver Capacity liters 2 x 90 130 + 90 2 x 130 170 + 130Standard version Lw / Lp (5) dB(A) 96 / 64 98 / 66 100 / 68

Low Noise version Lw / Lp (5) dB(A) 88 / 56 90 / 58 91 / 59

TECHNICAL CHARACTERISTICS

(1) Cooling capacity for 12 / 7°C evaporator chilled water and 30 / 35 °C condenser hot water(2) Cooling capacity for 12 / 7°C evaporator chilled water and 45°C condensing temperature(3) Compressors absorbed power(4) LWN units without condensor are delivered with safety charge of nitrogen(5) Lw : Global sound power level - Lp : Global sound pressure level at 10 meters, in free field, following ISO 3744 regulation

HYDROCIAT LW - LWN - LWP 2500BZ2500BZ

HPS2800BZ

2800BZHPS

3200BZHPS

3400BZHPS

3750BZHPS

4200BZHPS

LW - LWP versionCooling capacity (1) kW 624 670 705 755 834 887 983 1113Absorbed power (3) kW 162 168 179 186 212 226 250 283EER/ESEER 3.89/4.42 3.99/4.61 3.92/4.62 4.04/4.8 3.93/4.78 3.91/4.61 3.92/4.65 3.93/4.92

LWN versionCooling capacity (2) kW 619 664 690 744 - - - -Absorbed power (3) kW 169 175 190 198 - - - -

Compressor

Type Hermetic twin screwNumber 2 3Rotation speed rpm 2900

R407C refrigerant charge (4) kgcirc.1 56 63 55 62 42 70 66 66circ.2 56 64 55 63 60 50 66 66circ.3 - - - - 46 70 66 73

Capacity controlModulating from 25 to 100%

(50 to 100% on each compressor)Modulating from 17 to 100%

(50 to 100% on each compressor)Type of oil for R407C BITZER BSE 170Oil charge for compressor liters 2 x 22 22 + 2 x 15 2 x 22 + 15 3 x 22

Evaporator

Type Shell and tubesNumber 1Water capacity liters 188 267 353Hydraulic connections VICTAULIC typeMaximum pressure on water side bar 10Mini / maxi water flow m3/h 50 / 150 60 / 180 70 / 211

Water cooledcondenser

Type Shell and tubes with dry expansionNumber 2 3Water capacity liters 2 x 49 2 x 56 56 + 2 x 36 2 x 49 + 36 3 x 49 3 x 56Hydraulic connections VICTAULIC typeMaximum pressure on water side bar 10Maximum water flow m3/h 240 300 316 310 333 420

LWN liquid receiver Capacity liters 2 x 170 - - - -Standard version Lw / Lp (5) dB(A) 102 / 70 105 / 73 102 / 70 103 / 71 105 / 73

Low Noise version Lw / Lp (5) dB(A) 93 / 61 96 / 64 94 / 62 96 / 64 98 / 66


HYDROCIAT LW R407C

6


HYDROCIAT LW - LWN - LWP 1200BZ 1200BZ HPS 1500BZ 1500BZ HPS 1800BZ 1800BZ HPS 2150BZ 2150BZ HPS

COMPRESSORS (1)

Maximum nominal current A216

(2 x 108)270

(162 + 108)324

(2 x 162)378

(216 + 162)Part winding starting current (3) A 377 531 585 774

Starting current with Soft start option(3)

A 283 337 437 560

REMOTE-CONTROLLED AUXILIARY CIRCUIT (2)Maximum nominal current A 4Transformer power VA 630 1000

ELECTRICAL CHARACTERISTICS

HYDROCIAT LW - LWN - LWP 2500BZ 2500BZ HPS 2800BZ 2800BZ HPS 3200BZ HPS 3400BZ HPS 3750BZ HPS 4200BZ HPS

COMPRESSORS (1)

Maximum nominal current A432

(2 x 216)492

(2 x 246)570

(246 + 2 x 162)594

(2 x 216 + 162)648

(3 x 216)738

(3 x 246)Part winding starting current (3) A 828 911 989 990 1044 1157

Starting current with Soft start option(3)

A 614 647 776 830 924

REMOTE-CONTROLLED AUXILIARY CIRCUIT (2)Maximum nominal current A 4Transformer power VA 1000

(1) Current for 400V / 3Ph / 50Hz voltage(2) Current for 230V / 1Ph / 50Hz voltage(3) Starting current of the biggest compressor + maximum current of others compressors in full loadNominal current for cables selection = add the maximum nominal currents indicated in the above tables

Electrical panel for LW 1200BZ (HPS) to 2800BZ (HPS)


HYDROCIAT LW R407C

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DIMENSIONS

HYDROCIAT LW - LWP

■ 2 compressors, 2 refrigerant circuits

LW - LWP A - BVictaulic

c - dVictaulic

D E F G H J K M N P R SWeight in kg

empty in operation

1200BZ (HPS) PN 16 DN 150 PN 16 DN 125 135 3285 3260 2130 578 2200 2945 850 1950 400 170 670 1510 1620

1500BZ (HPS) PN 16 DN 150 PN 16 DN 125 135 4285 3595 2730 783 3200 3945 1050 1950 400 170 670 2120 2270

1800BZ (HPS) PN 16 DN 150 PN 16 DN 125 70 4285 3730 2720 783 3200 3945 815 2402 632 180 660 2880 3120

P P(1

)

DN 200DN 16

NOTE : the electrical wiring is on the right of the panel through the bottom

Dimensions in mm

(1) 1850 (models 1200BZ and 1500 BZ), 1860 (model 1800BZ) for reduced height version. Compressor suction valve mountedas standard and acoustically lined housing not available for this version.

a : cooling water inlet

b : cooling water outlet

c : chilled water inlet

d : chilled water outlet

Option 1 : compressor suction valve

Option 2 : acoustically lined housing

Option 3 : condensers headers (flexible hydraulic sleeves andflange/Victaulic adapter included)

Option 4 : hydraulic flexible connections (flange/Victaulicadapter included)

Option 5 : 8 antivibration mounts 300 x 50 x 25

with option

without option

without option

with option

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DIMENSIONS

HYDROCIAT LW - LWP


LW - LWP A BVictaulic

c - dVictaulic

E FWeight in kg

empty in operation

2150BZ (HPS) PN 16 DN 150 PN 16 DN 125 2720 200 3420 3660

2500BZ (HPS) PN 16 DN 150 PN 16 DN 150 2680 179 3850 4140

2800BZ (HPS) PN 16 DN 150 PN 16 DN 150 2680 179 3920 4220


Dimensions in mm

(1) 1970 for reduced height version. Compressor suction valve mounted as standard and acoustically lined housing not availablefor this version.








Option 4 : hydraulic flexible connections (flange/Victaulicadapter included)


(1)

4345

3200

4005

with option

without option

without option

with option


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DIMENSIONS

HYDROCIAT LW - LWP


LW - LWP A - B - CVictaulic

c - dD

Weight in kg

Victaulic empty in operation

3200BZ HPS PN 16 DN 150 PN 16 DN 200 160 5320 5740

3400BZ HPS PN 16 DN 150 PN 16 DN 200 160 5670 6130

3750BZ HPS PN 16 DN 150 PN 16 DN 200 160 6020 6480

4200BZ HPS PN 16 DN 150 PN 16 DN 200 127 6280 6750

(1)

4508

4065

3200


Dimensions in mm

(1) 2050 for reduced height version. Compressor isolating suction valve mounted as standard and acoustically lined housing noavailable for this version.








Option 4 : hydraulic flexible connections (flange/Victaulic adapterincluded)


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DIMENSIONS

HYDROCIAT LWN


LWN a∅ pipe

b∅ pipe

c∅ pipe

d∅ pipe

e - fVictaulic

C D G H J K L M N P RWeight in kg

empty in operation

1200BZ (HPS) 1” 5/8 1” 5/8 1” 5/8 1” 5/8 PN 16 DN 125 2130 135 450 450 450 751 3160 1954 400 455 560 1910 2020

1500BZ (HPS) 1” 5/8 2” 1/8 1” 5/8 1” 5/8 PN 16 DN 125 2730 135 410 350 500 1058 3730 2162 400 510 600 2530 2680

1800BZ (HPS) 2” 1/8 2” 1/8 2” 1/8 2” 1/8 PN 16 DN 125 2720 70 410 350 500 728 3730 2402 632 600 600 2820 3060

(1)

A

Dimensions in mm

(1) 1850 (models 1200BZ and 1500 BZ), 1860 (model 1800BZ) for reduced height version. Compressor suction valve mountedas standard and acoustically lined housing not available for this version.


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DIMENSIONS

HYDROCIAT LWN


(1)

LWN a∅ pipe

b∅ pipe

c∅ pipe

d∅ pipe

e - fVictaulic

B C D G HWeight in kg

empty in operation

2150BZ (HPS) 2” 1/8 2” 5/8 2” 1/8 2” 5/8 PN 16 DN 125 600 2720 200 2720 460 3330 3550

2500BZ (HPS) 2” 5/8 2” 5/8 2” 5/8 2” 5/8 PN 16 DN 150 510 2680 179 2680 380 3860 4150

2800BZ (HPS) 2” 5/8 2” 5/8 2” 5/8 2” 5/8 PN 16 DN 150 510 2680 179 2680 380 3880 4180

Dimensions in mm

(1) 1970 for reduced height version. Compressor suction valve mounted as standard and acoustically lined housing not availablefor this version.

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RECOMMENDATIONS FOR ASSEMBLY

HYDROCIAT LW - LWP

■ InstallationHYDROCIAT LW - LWP are designed for indoor installation and must be protected from adverse weather andfrost.

■ A free space of 1 meter must be left all around the unit foraccess to the electrical panel and other components.

■ A free space on one side is also necessary (equal to thelength of the unit) in case one of heat exchangers needs to beremoved.

■ Sound level problems should be studied in detail. Beforeinstalling the unit, study and if necessary treat (with theassistance of a sound technicien) the various possible noisetransmissions in relation to the premises and its structure. Ifnecessary the machine should be equipped with anti-vibrationmounts and flexible connections (recommended and proposedas an option).

■ Electrical connectionsAll the indications necessary for the electrical connections arementioned on the electrical diagram enclosed with the unit (tobe respected).

■ These connections must be made in accordance with accepted engineering practice and conform to the regulationsin force.

■ Leave the control circuit switched on to allow operation of thecrankcase heater.

■ The electrical mains supply must be fitted with a fuse orcircuit breaker protection (to be supplied by the fitter).

■ Hydraulic connections■ Water connections must be made in accordance with goodengineering practice.

■ Provide the accessories necessary for hydraulic circuits :

- Expansion vessel,

- Drain cocks at low points,

- Isolating valves,

- Air vents at high points, etc ...,

- Check that the water content in the installation is sufficient,

- Provide, if required, a buffer tank.

■ Commissioning■ In accordance with our installation and maintenance brochure.

■ Maintenance■ See our operating and maintenance guide.

■ Subscribe a maintenance contract.

HYDROCIAT LWN

■ InstallationHYDROCIAT LWN re designed for indoor installation and mustbe protected from adverse weather and frost.

■ A free space of 1 meter must be left all around the unit foraccess to the electrical panel and other components..

■ A free space on one side is also necessary (equal to thelength of the unit) in case one of heat exchangers needs to beremoved.

■ Sound level problems should be studied in detail. Beforeinstalling the unit, study and if necessary treat (with theassistance of a sound technicien) the various possible noisetransmissions in relation to the premises and its structure. Ifnecessary the machine should be equipped with anti-vibrationmounts and flexible connections (recommended and proposedas an option).

■ Electrical connectionsAll the indications necessary for the electrical connections arementioned on the electrical diagram enclosed with the unit (tobe respected).

■ These connections must be made in accordance with accepted engineering practice and conform to the regulationsin force.

■ Leave the control circuit under voltage to allow operation ofthe crankcase heater.

■ The electrical mains supply must be fitted with fuse or circuitbreaker protection (to be supplied by the fitter).

■ Hydraulic connections■ Water connections must be made in accordance with goodengineering practice.

■ Provide the accessories necessary for hydraulic circuits :

- Expansion vessel,

- Drain cocks at low points,

- Isolating valves,

- Air vents at high points, etc ...,

- Check that the water content in the installation is sufficient,

- Provide, if required, a buffer tank.

■ Refrigerant connections■ Work is to be carried out respecting the strictest acceptedengineering practice and generally include :

■ Installation of refrigerant piping between the internal part andthe condenser - discharge and liquid pipes.

■ Study with care the design (slope, diameter and trap to facilitate the return of oil to the compressor, particularly in partload).

■ Fit refrigerant flexibles sleeves if the unit is mounted onantivibration mounts

■ The length of connections between the 2 units will always beas short as possible (max. developped length : 15m, 6m ofchange in level; if indoubt, consult our technical departments).

■ Vacuum cleaning of the circuit, refrigerant charge, commissioning.

■ Maintenance■ Refer to the maintenance brochure delivered with each unit.

■ Subscribe a maintenance contract


HYDROCIAT LW R407C

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Non contractual document. With the thought of material improvement always in mind, CIAT reserves the right,without notice, to proceed with any technical modification.

Head office & FactoriesAvenue Jean Falconnier - B.P. 1401350 - Culoz - FranceTel.: +33 (0)4 79 42 42 42 - Fax: +33 (0)4 79 42 42 10e-mail: [email protected] - www.ciat.com

CCompagnie IIndustrielle d’AApplications TThermiques - S.A. with a registered capital of 26 000 000 € - R.C.S. Belley B 545 620 114

CIAT ServiceTel.: +33 (0)4 79 42 42 90 - Fax: +33 (0)4 79 42 42 13

XTRACONNECT CONTROL

- LDC multilingual screen (2 lines of 20 characters)- Pressures and temperatures reading- Pump control- Communication

Available free contacts inputs / outputs

Inputs : - External ON/OFF contact- Chilled water pump external ON/OFF contact- Setpoint 1/2 selection- General fault- Emergency stop- Compressors load shedding- 0 - 20 mA remote control

Output : - General fault of the unit- General fault per dircuit- Pump control

MODBUS-JBUS open Protocol (standard)LONWORKS Protocol (option)

RS 485 OUTPUT IN STANDARD

FREE CONTACTS RELAY CARD (OPTION)

REMOTE CONTROL BOX (OPTION)

Operation and design same as display console

Available outputs :- Water flow fault- Antifreeze fault- Pump fault- Fans fault- Emergency stop fault- Low and high pressure fault- Compressors safety fault- Compressors superheating fault- Compressors lubrication fault- Discharge temperature fault- Compressors running

ERGONOMIC INTERFACE PANEL

MULTICONNECT MULTI-UNIT MANAGEMENT (OPTION)Main functions available:

- Management of up to 8 units on a single water loop

- Management in cooling mode (water chiller) or heating mode (heat pump)

- Management of chilled-water or hot-waterpumps

- Centralised management of a backup unit- Unit load shedding- System time programming- Energy storage mode management- Fault management on each unit- Unit running time balancing- Integrated Modbus BMS link for obtaining

information on unit operation and faults

na08539a hydrociat lw - · pdf filewater cooled chillers hydrociat lw r407c air conditioning -...

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