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Product Manual Code: Printing date: CSS - Rev. 7.0 23/01/2013 McEnergy Mono R3.6.0 Air cooled screw chillers McEnergy Mono SE-ST (Standard Efficiency - Standard Noise) - Cooling Capacity from 101 to 413 kW SE-LN (Standard Efficiency - Low Noise) - Cooling Capacity from 98 to 398 kW

Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

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Air cooled screw chillers,SE-ST (Standard Efficiency - Standard Noise) - Cooling Capacity from 101 to 413 kWSE-LN (Standard Efficiency - Low Noise) - Cooling Capacity from 98 to 398 kWhttp://www.hvacvn.comhttp;//www.savame.com

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Page 1: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

Product ManualCode:

Printing date:

CSS - Rev. 7.0

23/01/2013

McEnergy Mono R3.6.0

Air cooled screw chillers

McEnergy MonoSE-ST (Standard Efficiency - Standard Noise) - Cooling Capacity from 101 to 413 kW

SE-LN (Standard Efficiency - Low Noise) - Cooling Capacity from 98 to 398 kW

Page 2: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

FEATURES AND BENEFITS

Low operating cost and extended operating life This chiller range is the result of careful design, aimed to

optimize the energy efficiency of the chillers, with the objective of bringing down operating costs and improving

installation profitability, effectiveness and economical management.

The chillers feature a high efficiency single screw compressor design, large condenser coil surface area for maximum

heat transfer and low discharge pressure, advanced technology condenser fans and a ‘shell&tube’ evaporator with low

refrigerant pressure drops.

Low operating sound levels Very low sound levels both at full load and part load conditions are achieved by the

latest compressor design and by a unique new fan that moves large volume of air at exceptionally low sound levels and

by the virtually vibration-free operation.

Infinite capacity control Cooling capacity control is infinitely variable by means of a single screw asymmetric

compressor controlled by microprocessor system. Each unit has infinitely variable capacity control from 100% down to

25%. This modulation allows the compressor capacity to exactly match the building cooling load without any leaving

evaporator water temperature fluctuation. This chilled water temperature fluctuation is avoided with a stepless control.

With a compressor load step control in fact, the

compressor capacity, at partial loads, will be too high or

too low compared to the building cooling load. The result

is an increase in chiller energy costs, particularly at the

part-load conditions at which the chiller operates most of

the time.

Units with stepless regulation offer benefits that the units

with step regulation are unable to match. The ability to

follow the system energy demand at any time and the

possibil ity to provide steady outlet water temperature

without deviations from the set-point, are the two points

that allow you to understand how the optimum operating

conditions of a system can be met through the use of a

unit with stepless regulation.

Superior control logic The new MicroTech III controller provides an easy to use control environmental. The control

logic is designed to provide maximum efficiency, to continue operation in unusual operating conditions and to provide a

history of unit operation. One of the greatest benefits is the easy interface with LonWorks, Bacnet, Ethernet TCP/IP or

Modbus communications.

Code requirements – Safety and observant of laws/directives Units are designed and manufactured in

accordance with applicable selections of the following:

Construction of pressure vessel

Machinery Directive

Low Voltage

Electromagnetic Compatibility

Electrical & Safety codes

Manufacturing Quality Stds

97/23/EC (PED)

2006/42/EC

2006/95/EC

2004/108/EC

EN 60204–1 / EN 60335-2-40

UNI – EN ISO 9001:2004

Certifications Units are CE marked, complying with European directives in force, concerning manufacturing and

safety. On request units can be produced complying with laws in force in non European countries (ASME, GOST, etc.),

and with other applications, such as naval (RINA, etc.).

Page 2 of 40

Page 3: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

FEATURES AND BENEFITS

Versions This range is available as standard efficiency version:

STANDARD EFFICIENCY

10 sizes to cover a range from 98 up to 413 kW with an EER up to 2.98 and an ESEER up to 3.34 (data refer to

Standard Noise configuration).

The EER (Energy Efficiency Ratio) is the ratio of the Cooling Capacity to the Power Input of the unit. The Power Input

includes: the power input for operation of the compressor, the power input of all control and safety devices, the power

input for fans.

The ESEER (European Seasonal Energy Efficiency Ratio) is a weighed formula enabling to take into account the

variation of EER with the load rate and the variation of air inlet condenser temperature.

ESEER = A x EER100% + B x EER75% + C x EER50% + D x EER25%

K = Coefficient; T = Air inlet condenser temperature.

Sound configurations Standard and low sound configurations available as follows:

STANDARD SOUND

Condenser fan rotating at 900 rpm, rubber antivibration under compressor

LOW SOUND

Condenser fan rotating at 700 rpm, rubber antivibration under compressor, compressor sound enclosure.

Page 3 of 40

Page 4: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

GENERAL CHARACTERISTICS

Cabinet and structure The cabinet is made of galvanized steel sheet and painted to provide a high resistance to

corrosion. Colour Ivory White (Munsell code 5Y7.5/1) (±RAL7044).The base frame has an eye-hook to lift the unit with

ropes for an easy installation. The weight is uniformly distributed along the profiles of the base and this facilitates the

arrangement of the unit.

Compressor (Symmetric Single Screw) The compressor is semi-hermetic, single-screw type with gate-rotors

made of carbon impregnated engineered composite material. The compressor has one slide managed by the unit

microprocessor for infinitely modulating the capacity between 100% to 25%. An integrated high efficiency oil separator

maximizes the oil separation and standard start is Wye-Delta (Y-Δ) type.

Compressor (Asymmetric Single Screw) The compressor is semi-hermetic, single-screw type with gate-rotor

made with the latest high-strength fibre reinforced star material. The compressor has an asymmetric slide regulation

managed by the unit controller for infinitely modulating capacity from 100% to 25%. An integrated high efficiency oil

separator maximizes the oil separation and standard start is Wye-Delta (Y-Δ) type.

Refrigerant The compressors have been designed to operate with R-134a, ecological refrigerant with zero ODP

(Ozone Depletion Potential) and very low GWP (Global Warming Potential), resulting in low TEWI (Total Equivalent

Warming Impact).

Evaporator (Plate Heat Exchanger) The unit is equipped with a direct expansion plate to plate type

evaporator. This heat exchanger is made of stainless steel brazed plates and is covered with a 20mm closed cell

insulation material. The exchanger is equipped with an electric heater for protection against freezing down to –28°C

and evaporator water connections are provided with victaulic kit (as standard). The evaporator has 1 circuit (one

compressor) and is manufactured in accordance to PED approval. Flow switch on evaporator standard factory

mounted. Water filter is standard.

Condenser The condenser is manufactured with internally enhanced seamless copper tubes arranged in a staggered

row pattern and mechanically expanded into lanced and rippled aluminum condenser fins with full fin collars. An

integral sub-cooler circuit provides sub-cooling to effectively eliminate liquid flashing and increase cooling capacity

without increasing the power input.

Condenser fans (ø 800) The condenser fans are propeller type with high efficiency design blades to maximize

performances. The material of the blades is glass reinforced resin and each fan is protected by a guard. Fan motors

are internally protected from overtemperature and are IP54.

Electronic expansion valve The unit is equipped with the most advanced electronic expansion valves to achieve

precise control of refrigerant mass flow. As today’s system requires improved energy efficiency, tighter temperature

control, wider range of operating conditions and incorporate features like remote monitoring and diagnostics, the

application of electronic expansion valves becomes mandatory.

Electronic expansion valves possess unique features: short opening and closing time, high resolution, positive shut-off

function to eliminate use of additional solenoid valve, continuous modulation of mass flow without stress in the

refrigerant circuit and corrosion resistance stainless steel body.

Electronic expansion valves are typically working with lower ΔP between high and low pressure side, than a

thermostatic expansion valve. The electronic expansion valve allows the system to work with low condenser pressure

(winter time) without any refrigerant flow problems and with a perfect chilled water leaving temperature control.

Refrigerant circuit Each unit has 1 independent refrigerant circuit and each one includes:

• Compressor with integrated oil separator

• Refrigerant

• Evaporator

• Air Cooled Condenser

• Electronic expansion valve

• Discharge line shut off valve

• Liquid line shut off valve

• Sight glass with moisture indicator

• Filter drier

• Charging valves

• High pressure switch

• High pressure transducers

• Low pressure transducers

• Oil pressure transducer

• Suction temperature sensor

Electrical control panel Power and control are located in the main panel that is manufactured to ensure

protection against all weather conditions. The electrical panel is IP54 and (when opening the doors) internally protected

against possible accidental contact with live parts. The main panel is fitted with a main switch interlocked door that

shuts off power supply when opening.

Power Section

The power section includes compressors and fans protection devices, compressors and fans starters and

control circuit power supply.

Page 4 of 40

Page 5: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

GENERAL CHARACTERISTICS

MicroTech III controller

MicroTech III controller is installed as standard; it can be used to modify unit set-points and check control

parameters. A built-in display shows chiller operating status plus temperatures and pressures of water,

refrigerant and air, programmable values, set-points. A sophisticated software with predictive logic,

selects the most energy efficient combination of compressors, EEXV and condenser fans to keep stable

operating conditions to maximise chiller energy efficiency and reliability.

MicroTech III is able to protect critical components based on external signals from its system (such as

motor temperatures, refrigerant gas and oil pressures, correct phase sequence, pressure switches and

evaporator). The input coming from the high pressure switch cuts all digital output from the controller in

less than 50ms, this is an additional security for the equipment.

Fast program cycle (200ms) for a precise monitoring of the system. Floating point calculations supported

for increased accuracy in Pressure / Temperature conversions.

Control section - main features

Control Section has the following feature.

• Management of the compressor stepless capacity and fans modulation.

• Chiller enabled to work in partial failure condition.

• Full routine operation at condition of:

- high ambient temperature value

- high thermal load

- high evaporator entering water temperature (start-up)

• Display of evaporator entering/leaving water temperature.

• Display of Outdoor Ambient Temperature.

• Display of condensing-evaporating temperature and pressure, suction and discharge superheat for each

circuit.

• Leaving water evaporator temperature regulation (temperature tolerance = 0,1°C).

• Compressor and evaporator pumps hours counter.

• Display of Status Safety Devices.

• Number of starts and compressor working hours.

• Optimized management of compressor load.

• Fan management according to condensing pressure.

• Re-start in case of power failure (automatic / manual).

• Soft Load (optimized management of the compressor load during the start-up).

• Start at high evaporator water temperature.

• Return Reset (Set Point Reset based on return water temperature).

• OAT (Outside Ambient temperature) Reset.

• Set point Reset (optional).

• Application and system upgrade with commercial SD cards.

• Ethernet port for remote or local servicing using standard web browsers.

• Two different sets of default parameters could be stored for easy restore.

Safety device / logic for each refrigerant circuit

The following devices / logics are available.

• High pressure (pressure switch).

• High pressure (transducer).

• Low pressure (transducer).

• Fans circuit breaker.

• High compressor discharge temperature.

• High motor winding temperature.

• Phase Monitor.

• Low pressure ratio.

• High oil pressure drop.

• Low oil pressure.

• No pressure change at start.

System security

The following securities are available.

• Phase monitor.

• Low Ambient temperature lock-out.

• Freeze protection.

Regulation type

Proportional + integral + derivative regulation on the evaporator leaving water output probe.

Page 5 of 40

Page 6: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

GENERAL CHARACTERISTICS

MicroTech III

MicroTech III built-in terminal has the following features.

• 164x44 dots liquid crystal display with white back lighting. Supports Unicode fonts for multi-lingual.

• Key-pad consisting of 3 keys.

• Push’n’Roll control for an increased usability.

• Memory to protect the data.

• General faults alarm relays.

• Password access to modify the setting.

• Application security to prevent application tampering or hardware usability with third party applications.

• Service report displaying all running hours and general conditions.

• Alarm history memory to allow an easy fault analysis.

Supervising systems (on request)

MicroTech III remote communication

MicroTech III is able to communicate to BMS (Building Management System) based on the most common

protocols as:

• ModbusRTU

• LonWorks, now also based on the international 8040 Standard Chiller Profile and LonMark Technology.

• BacNet BTP certifief over IP and MS/TP (class 4) (Native).

• Ethernet TCP/IP.

Page 6 of 40

Page 7: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPTIONS

Standard Options (supplied on basic unit)

Wye-Delta compressor starter (Y-D) - For low inrush current and reduced starting torque

Double setpoint - Dual leaving water temperature setpoints.

Phase monitor - Device that monitors input voltage and stops the chiller in case of phase loss or wrong phase

sequence.

Evaporator electric heater - Electric heater (controlled by a thermostat) to protect the evaporator from freezing

down to -28°C ambient temperature, providing the power supply is on.

Electronic expansion valve

Discharge line shut-off valve - Installed on the discharge port of the compressor to facil itate maintenance

operation.

Suction line shut-off valve - Installed on the suction port of the compressor to facilitate maintenance operation.

Ambient outside temperature sensor and setpoint reset

Hour run meter

General fault contactor

Setpoint reset, Demand limit and Alarm from external device - Setpoint Reset: The leaving water

temperature set-point can be overwritten with an external  4-20mA, through the ambient temperature, or through

the evaporator water temperature ΔT. Demand Limit: Chiller capacity can be limited through an external 4-20mA

signal or via network. Alarm from external device: The unit controller is able to receive an external alarm signal. The

user can decide whether this alarm signal will stop the unit or not.

Fans circuit breakers - Safety devices that, added to the standard protection devices, protect fan motors against

overload and overcurrent.

Main switch interlock door

Options (on request)

MECHANICAL

Total heat recovery - Produced with plate to plate or Shell&Tube heat exchangers to produce hot water.

Partial heat recovery - Produced with plate to plate heat exchangers to produce hot water.

Brine version - Allows the unit to operate down to -8°C leaving liquid temperature (antifreeze required).

20mm evaporator insulation - The external shell is covered with a 20mm closed cell insulation material.

Condenser coil guards

Cu-Cu condenser coil - To give better protection against corrosion by aggressive environments.

Cu-Cu-Sn condenser coil - To give better protection against corrosion in aggressive environments and by salty air.

Alucoat fins coil - Fins are protected by a special acrylic paint with a high resistance to corrosion.

High pressure side manometers

Low pressure side manometers

One centrifugal pump (low lift) - Hydronic kit consists of: single direct driven centrifugal pump, water filling

system with pressure gauge, safety valve, drain valve. The motor pump is protected by a circuit breaker installed in

control panel. The kit is assembled and wired to the control panel. The pipe and pump are protected from freezing

with an additional electrical heater.

One centrifugal pump (high lift) Hydronic kit consists of: single direct driven centrifugal pump, water fill ing

system with pressure gauge, safety valve, drain valve. The motor pump is protected by a circuit breaker installed in

control panel. The kit is assembled and wired to the control panel. The pipe and pump are protected from freezing

with an additional electrical heater.

Two centrifugal pump (low lift) - Hydronic kit consists of: twin direct driven centrifugal pumps, water filling

system with pressure gauge, safety valve, drain valve. The motor pump is protected by a circuit breaker installed in

control panel. The kit is assembled and wired to the control panel. The pipe and pumps are protected from freezing

with an additional electrical heater.

Two centrifugal pump (high lift) Hydronic kit consists of: twin direct driven centrifugal pumps, water fil ling

system with pressure gauge, safety valve, drain valve. The motor pump is protected by a circuit breaker installed in

control panel. The kit is assembled and wired to the control panel. The pipe and pumps are protected from freezing

with an additional electrical heater.

Double pressure relief valve with diverter

Page 7 of 40

Page 8: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPTIONS

ELECTRICAL / CONTROL

Soft starter - Electronic starting device to reduce the mechanical stress during compressor start-up

Compressor thermal overload relays - Safety electronic devices that, added to the standard protection devices,

protect compressor motors against overload and current unbalance.

Under / Over voltage control - Electronic device that monitors and displays input voltage, and stops the chiller in

case of phase loss, wrong phase sequence, or voltage exceeding minimum and maximum allowed values.

Energy meter - Device installed inside the control box that displays all chiller electrical power parameters at line

input such as line voltage and phase current,  input active and reactive power, active and reactive energy. An

integrated RS485 module allows a Modbus communication to an external BMS.

Capacitors for power factor correction - Devices that increase the power factor of the unit. The capacitors are

“dry” self-regenerating type with over pressure disconnecting safety device insulated with a no toxic dielectric mix

without PCB or PCT.

Current limit - To limit maximum absorbed current of the unit whenever is required

Speedtrol (fan speed control device - ON/OFF - up to -18°C) - Continuous fan speed regulation on the first

fan (VFD driven) of each circuit. It allows unit operation down to -18ºC.

Evaporator flow switch - Supplied separately to be wired and installed on the evaporator water piping (by the

customer).

Compressors circuit breakers Safety devices that include in a single device all safety functions otherwise

provided by standard fuses and optional thermal relays, such as protection against overcurrent, overload, current

unbalance.

Fans speed regulation (+ fan silent mode) - Continuous fan speed regulation of all fans (VFD driven) for

improved sound level of the unit during low ambient temperature operation. At very low temperatures, all fans

except the first are switched off thus allowing unit operation down to -18°C.

INSTALLATION

Rubber anti vibration mounts - Supplied separately, these are positioned under the base of the unit during

installation. Ideal to reduce the vibrations when the unit is floor mounted.

Spring anti vibration mounts - Supplied separately, these are positioned under the base of the unit during

installation. Ideal for dampening vibrations for installation on roofs and metallic structures.

External tank without cabinet (500 L)

External tank without cabinet (1000 L)

External tank with cabinet (500 L)

External tank with cabinet (1000 L)

OTHER

Container Kit

Witness test

Acoustic test

Transport kit

Page 8 of 40

Page 9: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

NOMENCLATURE

MNG Mono 0 2 9 1 A SE S T -

= Air cooled chiller cooling

only

McEnergy Mono

Machine type

Unit Size

Always 3-digit

code

= Approximation of

cooling capacity (RT)

Number of compressors

1

Model series

A, B, …

Efficiency level

SE = Standard Efficiency

Sound level

ST

LN

= Standard sound

= Low sound

Not used

Page 9 of 40

Page 10: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

TECHNICAL SPECIFICATIONS

McEng Mono-SE-ST

034.1 039.1 046.1 052.1 061.1 087.1073.1029.1MODEL

Capacity - Cooling (1) kW 307256214183163121101 138

Capacity control - Type --- SteplessSteplessSteplessSteplessSteplessSteplessStepless Stepless

Capacity control - Minimum capacity % 25.025.025.025.025.025.025.0 25.0

Unit power input - Cooling (1) kW 11186.871.868.560.447.138.7 53.5

EER (1) --- 2.772.952.982.672.702.572.61 2.58

ESEER --- 3.053.183.022.812.932.922.93 2.74

IPLV --- 3.563.683.483.253.133.253.36 2.98

CASING

Colour (2) --- IWIWIWIWIWIWIW IW

Material (2) --- GPSSGPSSGPSSGPSSGPSSGPSSGPSS GPSS

DIMENSIONS

Height mm 2223222322732273227322732273 2273

Width mm 2236223612921292129212921292 1292

Length mm 3070307039653965306521652165 3065

WEIGHT

Unit Weight kg 2919291920862086186116841684 1861

Operating Weight kg 2963296321162116188116991699 1881

WATER HEAT EXCHANGER

Type (3) --- PHEPHEPHEPHEPHEPHEPHE PHE

Water Volume l 30253024201512 17

Nominal water flow rate - Cooling l/s 14.612.210.28.77.85.84.8 6.6

Nominal Water pressure drop - Cooling kPa 48472122242524 23

Insulation material (4) CCCCCCCCCCCCCC CC

AIR HEAT EXCHANGER

Type (5) --- HFPHFPHFPHFPHFPHFPHFP HFP

FAN

Type (6) --- DPTDPTDPTDPTDPTDPTDPT DPT

Drive (7) --- DOLDOLDOLDOLDOLDOLDOL DOL

Diameter mm 800800800800800800800 800

Nominal air flow l/s 32772327722115321848158651057610924 16386

Quantity No. 6644322 3

Speed rpm 900900900900900900900 900

Motor input kW 10.510.57.07.05.33.53.5 5.3

COMPRESSOR

Type --- Asymm

Single

Screw

Asymm

Single

Screw

Single

Screw

Single

Screw

Single

Screw

Single

Screw

Single

Screw

Single

Screw

Oil charge l 19161313131313 13

Quantity No. 1111111 1

SOUND LEVEL

Sound Power - Cooling dB(A) 94949493929292 92

Sound Pressure - Cooling (8) dB(A) 75757574747474 74

REFRIGERANT CIRCUIT

Refrigerant type --- R134aR134aR134aR134aR134aR134aR134a R134a

Refrigerant charge kg 46463330282118 23

N. of circuits No. 1111111 1

PIPING CONNECTIONS

Evaporator water inlet/outlet 3 "3 "3 "3 "3 "3 "3 " 3 "

Fluid: Water

(1) Cooling capacity, unit power input in cooling and EER are based on the following conditions: evaporator 12.0/7.0°C; ambient 35.0°C, unit at full

load operation;

(2) IW: Ivory White; GPSS: Galvanized and Painted Steel Sheet; (3) PHE: Plate Heat Exchanger --- S&T: Single Pass Shell & Tube

(4) CC: Closed Cell; (5) HFP: High efficiency fin and tube type with integral subcooler

(6) DPT: Direct Propeller Type; (7) DOL: Direct On Line - VFD: Inverter - BRS: Brushless

(8) The values are according to ISO 3744 and are referred to: evaporator 12/7°C, ambient 35°C, full load operation.

Page 10 of 40

Page 11: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

TECHNICAL SPECIFICATIONS

McEng Mono-SE-ST

118.1102.1MODEL

Capacity - Cooling (1) kW 413360

Capacity control - Type --- SteplessStepless

Capacity control - Minimum capacity % 25.025.0

Unit power input - Cooling (1) kW 145133

EER (1) --- 2.842.71

ESEER --- 3.343.23

IPLV --- 3.653.61

CASING

Colour (2) --- IWIW

Material (2) --- GPSSGPSS

DIMENSIONS

Height mm 22232223

Width mm 22362236

Length mm 30703070

WEIGHT

Unit Weight kg 29192919

Operating Weight kg 29632963

WATER HEAT EXCHANGER

Type (3) --- PHEPHE

Water Volume l 4436

Nominal water flow rate - Cooling l/s 19.717.2

Nominal Water pressure drop - Cooling kPa 4548

Insulation material (4) CCCC

AIR HEAT EXCHANGER

Type (5) --- HFPHFP

FAN

Type (6) --- DPTDPT

Drive (7) --- DOLDOL

Diameter mm 800800

Nominal air flow l/s 3172931729

Quantity No. 66

Speed rpm 900900

Motor input kW 10.510.5

COMPRESSOR

Type --- Asymm

Single

Screw

Asymm

Single

Screw

Oil charge l 1919

Quantity No. 11

SOUND LEVEL

Sound Power - Cooling dB(A) 9594

Sound Pressure - Cooling (8) dB(A) 7675

REFRIGERANT CIRCUIT

Refrigerant type --- R134aR134a

Refrigerant charge kg 6056

N. of circuits No. 11

PIPING CONNECTIONS

Evaporator water inlet/outlet 3 "3 "

Fluid: Water

(1) Cooling capacity, unit power input in cooling and EER are based on the following conditions: evaporator 12.0/7.0°C; ambient 35.0°C, unit at full

load operation;

(2) IW: Ivory White; GPSS: Galvanized and Painted Steel Sheet; (3) PHE: Plate Heat Exchanger --- S&T: Single Pass Shell & Tube

(4) CC: Closed Cell; (5) HFP: High efficiency fin and tube type with integral subcooler

(6) DPT: Direct Propeller Type; (7) DOL: Direct On Line - VFD: Inverter - BRS: Brushless

(8) The values are according to ISO 3744 and are referred to: evaporator 12/7°C, ambient 35°C, full load operation.

Page 11 of 40

Page 12: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

TECHNICAL SPECIFICATIONS

McEng Mono-SE-LN

034.1 039.1 046.1 052.1 061.1 087.1073.1029.1MODEL

Capacity - Cooling (1) kW 29624920917715711697.9 134

Capacity control - Type --- SteplessSteplessSteplessSteplessSteplessSteplessStepless Stepless

Capacity control - Minimum capacity % 25.025.025.025.025.025.025.0 25.0

Unit power input - Cooling (1) kW 11084.472.367.860.447.938.9 53.0

EER (1) --- 2.692.952.892.612.602.422.52 2.53

ESEER --- 3.413.553.323.073.002.973.01 2.85

IPLV --- 3.753.863.483.283.463.213.32 3.30

CASING

Colour (2) --- IWIWIWIWIWIWIW IW

Material (2) --- GPSSGPSSGPSSGPSSGPSSGPSSGPSS GPSS

DIMENSIONS

Height mm 2223222322732273227322732273 2273

Width mm 2236223612921292129212921292 1292

Length mm 3070307039653965306521652165 3065

WEIGHT

Unit Weight kg 3029302921862186196117841784 1961

Operating Weight kg 3073307322162216198117991799 1981

WATER HEAT EXCHANGER

Type (3) --- PHEPHEPHEPHEPHEPHEPHE PHE

Water Volume l 30253024201512 17

Nominal water flow rate - Cooling l/s 14.111.910.08.47.55.54.7 6.4

Nominal Water pressure drop - Cooling kPa 45452021232323 22

Insulation material (4) CCCCCCCCCCCCCC CC

AIR HEAT EXCHANGER

Type (5) --- HFPHFPHFPHFPHFPHFPHFP HFP

FAN

Type (6) --- DPTDPTDPTDPTDPTDPTDPT DPT

Drive (7) --- DOLDOLDOLDOLDOLDOLDOL DOL

Diameter mm 800800800800800800800 800

Nominal air flow l/s 251202512016288167471221681448373 12560

Quantity No. 6644322 3

Speed rpm 700700700700700700700 700

Motor input kW 4.74.73.13.12.41.61.6 2.4

COMPRESSOR

Type --- Asymm

Single

Screw

Asymm

Single

Screw

Single

Screw

Single

Screw

Single

Screw

Single

Screw

Single

Screw

Single

Screw

Oil charge l 19161313131313 13

Quantity No. 1111111 1

SOUND LEVEL

Sound Power - Cooling dB(A) 92929290908989 90

Sound Pressure - Cooling (8) dB(A) 73737371717171 71

REFRIGERANT CIRCUIT

Refrigerant type --- R134aR134aR134aR134aR134aR134aR134a R134a

Refrigerant charge kg 46463330282118 23

N. of circuits No. 1111111 1

PIPING CONNECTIONS

Evaporator water inlet/outlet 3 "3 "3 "3 "3 "3 "3 " 3 "

Fluid: Water

(1) Cooling capacity, unit power input in cooling and EER are based on the following conditions: evaporator 12.0/7.0°C; ambient 35.0°C, unit at full

load operation;

(2) IW: Ivory White; GPSS: Galvanized and Painted Steel Sheet; (3) PHE: Plate Heat Exchanger --- S&T: Single Pass Shell & Tube

(4) CC: Closed Cell; (5) HFP: High efficiency fin and tube type with integral subcooler

(6) DPT: Direct Propeller Type; (7) DOL: Direct On Line - VFD: Inverter - BRS: Brushless

(8) The values are according to ISO 3744 and are referred to: evaporator 12/7°C, ambient 35°C, full load operation.

Page 12 of 40

Page 13: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

TECHNICAL SPECIFICATIONS

McEng Mono-SE-LN

118.1102.1MODEL

Capacity - Cooling (1) kW 398345

Capacity control - Type --- SteplessStepless

Capacity control - Minimum capacity % 25.025.0

Unit power input - Cooling (1) kW 150134

EER (1) --- 2.652.58

ESEER --- 3.453.34

IPLV --- 3.763.63

CASING

Colour (2) --- IWIW

Material (2) --- GPSSGPSS

DIMENSIONS

Height mm 22232223

Width mm 22362236

Length mm 30703070

WEIGHT

Unit Weight kg 30293029

Operating Weight kg 30733073

WATER HEAT EXCHANGER

Type (3) --- PHEPHE

Water Volume l 4436

Nominal water flow rate - Cooling l/s 19.016.5

Nominal Water pressure drop - Cooling kPa 4244

Insulation material (4) CCCC

AIR HEAT EXCHANGER

Type (5) --- HFPHFP

FAN

Type (6) --- DPTDPT

Drive (7) --- DOLDOL

Diameter mm 800800

Nominal air flow l/s 2443224432

Quantity No. 66

Speed rpm 700700

Motor input kW 4.74.7

COMPRESSOR

Type --- Asymm

Single

Screw

Asymm

Single

Screw

Oil charge l 1919

Quantity No. 11

SOUND LEVEL

Sound Power - Cooling dB(A) 9392

Sound Pressure - Cooling (8) dB(A) 7473

REFRIGERANT CIRCUIT

Refrigerant type --- R134aR134a

Refrigerant charge kg 6056

N. of circuits No. 11

PIPING CONNECTIONS

Evaporator water inlet/outlet 3 "3 "

Fluid: Water

(1) Cooling capacity, unit power input in cooling and EER are based on the following conditions: evaporator 12.0/7.0°C; ambient 35.0°C, unit at full

load operation;

(2) IW: Ivory White; GPSS: Galvanized and Painted Steel Sheet; (3) PHE: Plate Heat Exchanger --- S&T: Single Pass Shell & Tube

(4) CC: Closed Cell; (5) HFP: High efficiency fin and tube type with integral subcooler

(6) DPT: Direct Propeller Type; (7) DOL: Direct On Line - VFD: Inverter - BRS: Brushless

(8) The values are according to ISO 3744 and are referred to: evaporator 12/7°C, ambient 35°C, full load operation.

Page 13 of 40

Page 14: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

ELECTRICAL SPECIFICATIONS

McEng Mono-SE-ST

034.1 039.1 046.1 052.1 061.1 087.1073.1029.1MODEL

POWER SUPPLY

Phases Nr 3 3 3 3 3 3 3 3

Frequency Hz 50 50 50 50 50 50 50 50

Voltage V 400 400 400 400 400 400 400 400

Voltage tolerance Minimum % -10% -10% -10% -10% -10% -10% -10% -10%

Voltage tolerance Maximum % +10% +10% +10% +10% +10% +10% +10% +10%

UNIT

Maximum starting current A 151 151 195 195 288 288 330 410

Nominal running current cooling A 67 81 92 102 116 121 148 185

Maximum running current A 86 103 119 132 157 164 198 242

Maximum current for wires sizing A 94 112 130 144 171 179 215 264

FANS

Nominal running current cooling A 8 8 12 12 16 16 24 24

COMPRESSORS

Phases Nr 3 3 3 3 3 3 3 3

Voltage V 400 400 400 400 400 400 400 400

Voltage tolerance Minimum % -10% -10% -10% -10% -10% -10% -10% -10%

Voltage tolerance Maximum % +10% +10% +10% +10% +10% +10% +10% +10%

Maximum running current A 78 95 107 120 141 148 174 218

Starting method --- Y-Δ Y-Δ Y-Δ Y-Δ Y-Δ Y-Δ Y-Δ Y-Δ

McEng Mono-SE-ST

118.1102.1MODEL

POWER SUPPLY

Phases Nr 3 3

Frequency Hz 50 50

Voltage V 400 400

Voltage tolerance Minimum % -10% -10%

Voltage tolerance Maximum % +10% +10%

UNIT

Maximum starting current A 410 410

Nominal running current cooling A 220 241

Maximum running current A 284 298

Maximum current for wires sizing A 310 326

FANS

Nominal running current cooling A 24 24

COMPRESSORS

Phases Nr 3 3

Voltage V 400 400

Voltage tolerance Minimum % -10% -10%

Voltage tolerance Maximum % +10% +10%

Maximum running current A 260 274

Starting method --- Y-Δ Y-Δ

Fluid: Water

Allowed voltage tolerance ± 10%. Voltage unbalance between phases must be within ± 3%.

Maximum starting current: starting current of biggest compressor + current of the compressor at 75% maximum load + fans current for the

circuit at 75%.

Nominal current in cooling mode is referred to the following conditions: evaporator 12/7°C; ambient 35°C; compressors + fans current.

Maximum running current is based on max compressor absorbed current in its envelope and max fans absorbed current

Maximum unit current for wires sizing is based on minimum allowed voltage

Maximum current for wires sizing: (compressors full load ampere + fans current) x 1,1.

Page 14 of 40

Page 15: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

ELECTRICAL SPECIFICATIONS

McEng Mono-SE-LN

034.1 039.1 046.1 052.1 061.1 087.1073.1029.1MODEL

POWER SUPPLY

Phases Nr 3 3 3 3 3 3 3 3

Frequency Hz 50 50 50 50 50 50 50 50

Voltage V 400 400 400 400 400 400 400 400

Voltage tolerance Minimum % -10% -10% -10% -10% -10% -10% -10% -10%

Voltage tolerance Maximum % +10% +10% +10% +10% +10% +10% +10% +10%

UNIT

Maximum starting current A 151 151 195 195 288 288 330 410

Nominal running current cooling A 67 83 92 103 116 122 144 184

Maximum running current A 83 100 115 128 151 158 189 234

Maximum current for wires sizing A 91 109 126 140 165 173 207 256

FANS

Nominal running current cooling A 5 5 8 8 10 10 16 16

COMPRESSORS

Phases Nr 3 3 3 3 3 3 3 3

Voltage V 400 400 400 400 400 400 400 400

Voltage tolerance Minimum % -10% -10% -10% -10% -10% -10% -10% -10%

Voltage tolerance Maximum % +10% +10% +10% +10% +10% +10% +10% +10%

Maximum running current A 78 95 107 120 141 148 174 218

Starting method --- Y-Δ Y-Δ Y-Δ Y-Δ Y-Δ Y-Δ Y-Δ Y-Δ

McEng Mono-SE-LN

118.1102.1MODEL

POWER SUPPLY

Phases Nr 3 3

Frequency Hz 50 50

Voltage V 400 400

Voltage tolerance Minimum % -10% -10%

Voltage tolerance Maximum % +10% +10%

UNIT

Maximum starting current A 410 410

Nominal running current cooling A 223 249

Maximum running current A 276 290

Maximum current for wires sizing A 302 317

FANS

Nominal running current cooling A 16 16

COMPRESSORS

Phases Nr 3 3

Voltage V 400 400

Voltage tolerance Minimum % -10% -10%

Voltage tolerance Maximum % +10% +10%

Maximum running current A 260 274

Starting method --- Y-Δ Y-Δ

Fluid: Water

Allowed voltage tolerance ± 10%. Voltage unbalance between phases must be within ± 3%.

Maximum starting current: starting current of biggest compressor + current of the compressor at 75% maximum load + fans current for the

circuit at 75%.

Nominal current in cooling mode is referred to the following conditions: evaporator 12/7°C; ambient 35°C; compressors + fans current.

Maximum running current is based on max compressor absorbed current in its envelope and max fans absorbed current

Maximum unit current for wires sizing is based on minimum allowed voltage

Maximum current for wires sizing: (compressors full load ampere + fans current) x 1,1.

Page 15 of 40

Page 16: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

SOUND LEVELS

McEng Mono-SE-LN

Sound pressure level at 1 m from the unit (rif. 2 x 10-5 Pa) Power

63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A) dB(A)MODEL

68.3029.1 72.8 59.2 50.5 44.8 71.066.4 89.073.0 61.8

68.3034.1 72.8 59.2 50.5 44.8 71.066.4 89.073.0 61.8

68.5039.1 73.0 59.4 50.7 45.0 71.266.6 89.873.2 62.0

68.5046.1 73.0 59.4 50.7 45.0 71.266.6 89.873.2 62.0

68.7052.1 73.2 59.6 50.9 45.2 71.466.8 90.573.4 62.2

69.9061.1 74.4 60.8 52.1 46.4 72.668.0 91.774.6 63.4

69.8073.1 74.3 60.7 52.0 46.3 72.567.9 91.774.5 63.3

70.1087.1 74.6 61.0 52.3 46.6 72.868.2 92.074.8 63.6

70.1102.1 74.6 61.0 52.3 46.6 72.868.2 92.074.8 63.6

70.8118.1 75.3 61.7 53.0 47.3 73.568.9 92.775.5 64.3

McEng Mono-SE-ST

Sound pressure level at 1 m from the unit (rif. 2 x 10-5 Pa) Power

63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A) dB(A)MODEL

70.8029.1 75.3 61.7 53.0 47.3 73.568.9 91.575.5 64.3

70.8034.1 75.3 61.7 53.0 47.3 73.568.9 91.575.5 64.3

71.0039.1 75.5 61.9 53.2 47.5 73.769.1 92.375.7 64.5

71.0046.1 75.5 61.9 53.2 47.5 73.769.1 92.375.7 64.5

71.2052.1 75.7 62.1 53.4 47.7 73.969.3 93.075.9 64.7

72.4061.1 76.9 63.3 54.6 48.9 75.170.5 94.277.1 65.9

72.3073.1 76.8 63.2 54.5 48.8 75.070.4 94.277.0 65.8

72.6087.1 77.1 63.5 54.8 49.1 75.370.7 94.577.3 66.1

72.6102.1 77.1 63.5 54.8 49.1 75.370.7 94.577.3 66.1

73.3118.1 77.8 64.2 55.5 49.8 76.071.4 95.278.0 66.8

Page 16 of 40

Page 17: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

SOUND LEVEL AT DISTANCE

McEng Mono-SE-LN

SOUND PRESSURE LEVEL FOR DIFFERENT DISTANCES (dB(A))

50 m25 m20 m15 m10 m5 m1 mMODEL

029.1 54.0 49.857.1 51.662.271.0 44.0

034.1 54.0 49.857.1 51.662.271.0 44.0

039.1 54.6 50.557.8 52.362.871.2 44.8

046.1 54.6 50.557.8 52.362.871.2 44.8

052.1 55.3 51.258.4 53.063.371.4 45.4

061.1 56.5 52.459.6 54.264.572.6 46.6

073.1 56.4 52.459.6 54.264.472.5 46.6

087.1 56.7 52.759.9 54.564.772.8 46.9

102.1 56.7 52.759.9 54.564.772.8 46.9

118.1 57.4 53.460.6 55.265.473.5 47.6

McEng Mono-SE-ST

SOUND PRESSURE LEVEL FOR DIFFERENT DISTANCES (dB(A))

50 m25 m20 m15 m10 m5 m1 mMODEL

029.1 56.5 52.359.6 54.164.773.5 46.5

034.1 56.5 52.359.6 54.164.773.5 46.5

039.1 57.1 53.060.3 54.865.373.7 47.3

046.1 57.1 53.060.3 54.865.373.7 47.3

052.1 57.8 53.760.9 55.565.873.9 47.9

061.1 59.0 54.962.1 56.767.075.1 49.1

073.1 58.9 54.962.1 56.766.975.0 49.1

087.1 59.2 55.262.4 57.067.275.3 49.4

102.1 59.2 55.262.4 57.067.275.3 49.4

118.1 59.9 55.963.1 57.767.976.0 50.1

Fluid: Water

Note: The values are according to ISO 3744 and are referred to: evaporator 12/7° C, air ambient 35°C, full load operation

Page 17 of 40

Page 18: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPERATING LIMITS

Operating Limits

Note

The above graphic represents a guidelines about the operating limits of the range. Please refer to Chiller Selection

Software (CSS) for real operating limits working conditions for each size.

Legend:

ELWT = Evaporator Leaving Water Temperature (°C)

CIAT = Condenser Inlet Air Temperature (°C)

Ref.:

A = Unit can only work in 'ICE mode'

B = Operation with Glycol (below 4°C Evap LWT)

C = Fan speed modulation required (below 18°C Condens. Air Temp. for less than 3 fans units)

D = Fan speed modulation required (below 10°C Condens. Air Temp. for 3 or more fans units)

E = Speedtroll required (below -10°C Condens. Air Temp.)

Table 1 - Water heat exchanger - Minimum and maximum water Δt

Legend:

A = Max evaporator water Δt

B = Min evaporator water Δt

Table 2 - Water heat exchanger - Fouling factors

Page 18 of 40

Page 19: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPERATING LIMITS

Legend:

A = Fouling factors (m2 °C / kW)

B = Cooling capacity correction factor

C = Power input correction factor

D = EER correction factor

Table 3 - Air heat exchanger - Altitude correction factors

Legend:

A = Elevation above sea level (m)

B = Barometric pressure (mbar)

C = Cooling capacity correction factor

D = Power input correction factor

- Maximum operating altitude is 2000 m above sea level

- Contact factory in case the unit has to be installed at altitudes between 1000 and 2000 m above sea level

Table 4 - Minimum glycol percentage for low air ambient temperature

Legend:

AAT = Air Ambient Temperature (°C) (2)

A = Ethylene glycol (%) (1)

B = Propylene glycol (%) (1)

(1) Minimum glycol percentage to prevent freezing of water circuit at indicated air ambient temperature

(2) Air ambient temperature do exceed the operating limits of the unit, as protection of water circuit may be needed in

winter season at non-working conditions.

Table 5.1 - Available fan static pressure correction factors

The above data are referred to:

- Fan 800 mm diameter

- Fan speed 890 rpm or 900 rpm

Legend:

A = External Static Pressure (Pa)

B = Cooling Capacity (kW) Correction factor

C = Compressor Power Input (kW) Correction factor

D = Reduction of Maximum Condenser Inlet Air Temperature (°C)

Table 5.2 - Available fan static pressure correction factors

Page 19 of 40

Page 20: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPERATING LIMITS

The above data are referred to:

- Fan 800 mm diameter

- Fan speed 700 rpm or 705 rpm

Legend:

A = External Static Pressure (Pa)

B = Cooling Capacity (kW) Correction factor

C = Compressor Power Input (kW) Correction factor

D = Reduction of Maximum Condenser Inlet Air Temperature (°C)

Water content in cooling circuits The cooled water distribution circuits should have minimum water content to

avoid excessive compressors start and stop. In fact, each time the compressor starts up, an excessive quantity of oil

goes from the compressor sump and simultaneously there is a rise in the temperature of the compressor motor’s

stator due to the inrush current during the start-up. To prevent damage to the compressors, have been envisaged the

application of a device to limit frequent stops and restarts.

During the span of one hour there will be no more than 6 starts of the compressor. The plant side should therefore

ensure that the overall water content allows a more constant functioning of the unit and consequently greater

environmental comfort. The minimum water content per unit should be calculated with a certain approximation using

this simplified formula:

For 1 compressor unit

M (liters) = (0.94 x ΔT(°C) + 5.87) x P(kW)

where:

M = minimum water content per unit expressed in litres

P = cooling capacity of the unit expressed in kW

ΔT = evaporator entering / leaving water temperature difference expressed in °C

This formula is valid for standard microprocessor parameters. For more accurate determination of quantity of water, it

is advisable to contact the designer of the plant.

Water charge, flow and quality

Page 20 of 40

Page 21: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPERATING LIMITS

Page 21 of 40

Page 22: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

COOLING PERFORMANCE

McEng Mono-SE-ST

029.1 034.1

4540353025484540353025 48TaTwout

93.3CC kW 105 100 95.3 90.1 84.5 80.9 126 120 114 108 1015

54.6PI kW 31.9 34.7 37.8 41.1 44.6 46.9 38.7 42.2 45.9 50 54.3

4.4qw l/s 5.0 4.8 4.5 4.3 4.0 3.9 6.0 5.7 5.4 5.1 4.8

15dpw kPa 26 24 22 20 18 16 26 24 22 20 18

96.2CC kW 111 106 101 95.7 90 85.3 133 127 121 114 1077

53.4PI kW 32.7 35.6 38.7 42 45.7 47.2 39.8 43.3 47.1 51.2 55.6

4.6qw l/s 5.3 5.1 4.8 4.6 4.3 4.1 6.3 6.1 5.8 5.5 5.1

16dpw kPa 29 27 24 22 20 18 29 27 25 22 20

98CC kW 117 112 107 101 95.6 87.2 140 134 128 121 1149

51.5PI kW 33.6 36.5 39.7 43.1 46.7 45.7 40.9 44.4 48.3 52.5 57

4.7qw l/s 5.6 5.3 5.1 4.8 4.6 4.2 6.7 6.4 6.1 5.8 5.4

17dpw kPa 32 29 27 25 22 19 32 30 27 25 22

100CC kW 123 118 113 107 101 89.2 147 141 135 128 11911

50.1PI kW 34.5 37.5 40.7 44.1 47.8 44.6 42 45.6 49.5 53.8 56.8

4.8qw l/s 5.9 5.6 5.4 5.1 4.8 4.3 7.0 6.8 6.4 6.1 5.7

18dpw kPa 35 32 30 27 25 20 35 33 30 27 24

103CC kW 129 124 119 113 107 91 155 149 142 135 12113

49.2PI kW 35.5 38.5 41.7 45.2 48.9 43.4 43.2 46.9 50.8 55.1 55.5

4.9qw l/s 6.2 5.9 5.7 5.4 5.1 4.4 7.4 7.1 6.8 6.5 5.8

18dpw kPa 38 36 33 30 27 20 39 36 33 30 25

105CC kW 136 131 125 119 109 93.2 162 156 149 142 12415

48.2PI kW 36.5 39.5 42.7 46.2 47.9 42.6 44.4 48.1 52.2 56.5 54.1

5.0qw l/s 6.5 6.3 6.0 5.7 5.2 4.5 7.8 7.5 7.1 6.8 5.9

19dpw kPa 42 39 36 33 28 21 42 39 36 33 26

039.1 046.1

4540353025484540353025 48TaTwout

131CC kW 143 136 130 123 116 111 168 161 154 145 1375

73.3PI kW 44.3 48.1 52.3 56.9 61.9 65.3 49.7 54.2 58.9 64.1 69.7

6.2qw l/s 6.8 6.5 6.2 5.9 5.5 5.3 8.0 7.7 7.3 6.9 6.5

16dpw kPa 25 23 21 19 17 16 26 24 22 20 18

140CC kW 151 145 138 131 123 118 178 171 163 154 1457

74.9PI kW 45.4 49.3 53.5 58.1 63.3 66.7 51 55.5 60.4 65.6 71.3

6.7qw l/s 7.2 6.9 6.6 6.2 5.9 5.6 8.5 8.1 7.8 7.4 6.9

18dpw kPa 27 25 23 21 19 18 28 26 24 22 20

147CC kW 159 153 146 139 131 126 187 180 172 164 1549

75.3PI kW 46.6 50.5 54.8 59.5 64.8 68.2 52.3 56.9 61.8 67.2 72.9

7.0qw l/s 7.6 7.3 7.0 6.6 6.3 6.0 9.0 8.6 8.2 7.8 7.4

20dpw kPa 30 28 26 24 21 20 31 29 27 25 22

149CC kW 168 161 154 147 139 131 197 190 182 173 16411

72.9PI kW 47.7 51.7 56 60.9 66.3 68 53.7 58.3 63.3 68.7 74.6

7.1qw l/s 8.0 7.7 7.4 7.0 6.6 6.3 9.4 9.1 8.7 8.3 7.8

21dpw kPa 33 31 28 26 24 21 34 32 30 27 25

153CC kW 176 170 163 155 147 134 207 200 191 182 17313

71.1PI kW 48.9 52.9 57.4 62.3 67.8 66.4 55.1 59.7 64.8 70.3 76.2

7.3qw l/s 8.4 8.1 7.8 7.4 7.0 6.4 9.9 9.5 9.1 8.7 8.3

22dpw kPa 36 34 31 29 26 22 38 35 32 30 27

156CC kW 185 178 171 163 155 137 218 210 201 192 18215

69.2PI kW 50.2 54.3 58.8 63.8 69.3 64.8 56.5 61.3 66.4 72 77.9

7.4qw l/s 8.9 8.5 8.2 7.8 7.4 6.6 10.4 10.0 9.6 9.2 8.7

22dpw kPa 40 37 34 32 29 23 41 38 36 33 30

Page 22 of 40

Page 23: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

COOLING PERFORMANCE

McEng Mono-SE-ST

052.1 061.1

4540353025484540353025 48TaTwout

172CC kW 189 181 172 162 149 140 212 208 203 194 1815

91.1PI kW 56.7 61.5 66.9 73.1 80.1 84.8 58.1 63.9 70.3 77.5 85.7

8.2qw l/s 9.0 8.6 8.2 7.7 7.1 6.7 10.1 9.9 9.7 9.2 8.7

14dpw kPa 24 22 20 18 15 14 21 20 19 18 16

182CC kW 200 192 183 172 158 149 224 220 214 205 1927

93PI kW 58 63 68.5 74.8 82 86.7 59.5 65.3 71.8 79.1 87.5

8.7qw l/s 9.5 9.2 8.7 8.2 7.6 7.1 10.7 10.5 10.2 9.8 9.2

16dpw kPa 26 25 22 20 17 16 23 22 21 20 18

193CC kW 211 203 194 182 168 158 236 232 225 216 2039

94.9PI kW 59.4 64.5 70.2 76.6 83.9 88.7 60.8 66.8 73.4 80.9 89.3

9.2qw l/s 10.1 9.7 9.2 8.7 8.0 7.6 11.2 11.1 10.8 10.3 9.7

18dpw kPa 29 27 25 22 19 17 25 25 23 22 19

200CC kW 222 214 204 192 178 168 247 243 237 227 21311

95.3PI kW 60.9 66 71.8 78.4 85.9 90.8 62.2 68.3 75 82.6 91.3

9.6qw l/s 10.6 10.2 9.7 9.2 8.5 8.0 11.8 11.6 11.3 10.9 10.2

19dpw kPa 32 30 27 25 21 19 28 27 26 24 21

204CC kW 233 225 214 202 188 174 260 255 248 238 22413

92.7PI kW 62.4 67.6 73.5 80.3 87.9 90.6 63.6 69.8 76.7 84.4 93.2

9.8qw l/s 11.2 10.7 10.3 9.7 9.0 8.3 12.4 12.2 11.9 11.4 10.7

20dpw kPa 35 33 30 27 24 21 30 29 28 26 23

207CC kW 245 236 225 212 197 178 272 268 260 249 23515

90PI kW 64 69.3 75.3 82.1 90 88.4 65.1 71.4 78.4 86.3 95.2

9.9qw l/s 11.7 11.3 10.8 10.2 9.4 8.5 13.0 12.8 12.5 11.9 11.2

20dpw kPa 38 36 33 30 26 22 33 32 30 28 25

073.1 087.1

4540353025484540353025 48TaTwout

238CC kW 264 253 241 227 211 201 319 305 290 272 2515

130PI kW 72.4 78.2 84.9 92.6 102 108 93 100 108 116 125

11.3qw l/s 12.6 12.0 11.5 10.8 10.1 9.6 15.2 14.5 13.8 13.0 12.0

30dpw kPa 50 46 42 38 33 30 51 47 43 38 33

248CC kW 279 268 256 242 225 214 337 323 307 289 2677

132PI kW 74.2 80.1 86.8 94.5 103 109 95.7 103 111 119 128

11.8qw l/s 13.3 12.8 12.2 11.5 10.8 10.2 16.1 15.4 14.6 13.8 12.7

32dpw kPa 55 51 47 43 38 34 56 52 48 43 37

253CC kW 295 284 271 257 240 228 356 341 324 306 2839

130PI kW 76.2 82 88.7 96.5 105 111 98.4 106 114 123 132

12.1qw l/s 14.1 13.5 12.9 12.3 11.4 10.9 17.0 16.3 15.5 14.6 13.5

34dpw kPa 61 57 52 48 42 38 62 57 53 47 41

260CC kW 312 300 286 272 255 242 375 359 342 322 30011

128PI kW 78.2 84.1 90.8 98.5 107 113 101 109 117 126 136

12.4qw l/s 14.9 14.3 13.7 13.0 12.2 11.6 17.9 17.2 16.3 15.4 14.3

35dpw kPa 67 63 58 53 47 43 68 63 58 52 46

265CC kW 329 316 302 287 269 257 394 378 360 340 31313

126PI kW 80.3 86.2 92.9 101 110 115 104 112 121 130 138

12.7qw l/s 15.7 15.1 14.5 13.7 12.9 12.3 18.9 18.1 17.2 16.2 15.0

37dpw kPa 74 69 64 58 52 48 75 69 64 57 49

272CC kW 346 333 318 302 284 267 414 397 378 357 32015

124PI kW 82.6 88.4 95.1 103 112 115 107 115 124 134 137

13.0qw l/s 16.6 15.9 15.2 14.5 13.6 12.8 19.8 19.0 18.1 17.1 15.3

38dpw kPa 81 76 70 64 57 51 82 76 70 63 51

Page 23 of 40

Page 24: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

COOLING PERFORMANCE

McEng Mono-SE-ST

102.1 118.1

4540353025484540353025 48TaTwout

282CC kW 375 359 340 318 294 268 418 406 392 373 3395

146PI kW 111 120 129 139 149 152 120 130 141 153 163

13.4qw l/s 17.9 17.1 16.2 15.2 14.0 12.8 19.9 19.4 18.7 17.8 16.2

22dpw kPa 52 48 43 38 33 28 46 43 41 37 31

293CC kW 396 379 360 338 312 276 440 428 413 393 3467

146PI kW 114 123 133 143 154 150 123 134 145 158 161

14.0qw l/s 18.9 18.1 17.2 16.1 14.9 13.2 21.0 20.4 19.7 18.8 16.5

24dpw kPa 57 53 48 43 37 30 50 48 45 41 33

299CC kW 418 400 380 357 331 283 462 450 434 414 3549

143PI kW 118 127 137 148 159 148 127 138 150 163 159

14.3qw l/s 20.0 19.1 18.1 17.1 15.8 13.5 22.1 21.5 20.7 19.7 16.9

25dpw kPa 63 58 53 47 41 31 55 52 49 45 34

303CC kW 440 421 400 377 344 290 485 472 455 434 35911

139PI kW 121 131 141 152 161 145 131 142 154 168 156

14.5qw l/s 21.0 20.1 19.1 18.0 16.4 13.9 23.2 22.6 21.8 20.7 17.2

26dpw kPa 69 64 58 52 44 33 60 57 53 49 35

310CC kW 463 443 421 396 349 295 509 495 477 454 36613

137PI kW 125 135 145 156 158 142 135 146 159 173 153

14.8qw l/s 22.1 21.2 20.1 19.0 16.7 14.1 24.3 23.7 22.8 21.7 17.5

27dpw kPa 76 70 64 57 46 34 65 62 58 53 36

317CC kW 486 465 442 416 357 302 533 518 499 466 37115

135PI kW 129 139 149 161 156 139 139 151 163 174 150

15.2qw l/s 23.3 22.3 21.2 19.9 17.1 14.5 25.5 24.8 23.9 22.3 17.8

28dpw kPa 83 77 70 63 47 35 71 68 63 56 37

Fluid: Water

Ta: Condenser inlet air temperature; Twout: Evaporator leaving water temperature (Δt 5°C)

CC: Cooling capacity; PI: Power input; qw: Fluid flow rate; dpw: Fluid pressure drop

* For working condition where dpw value is "Italic-Red Color" please contac factory

Page 24 of 40

Page 25: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

COOLING PERFORMANCE

McEng Mono-SE-LN

029.1 034.1

4540353025484540353025 48TaTwout

77.3CC kW 102 97.4 92.4 87.1 81.2 70.4 121 116 110 103 92.25

46.3PI kW 31.7 34.6 37.8 41.2 44.9 41.3 39.1 42.7 46.6 50.8 52.2

3.7qw l/s 4.9 4.6 4.4 4.2 3.9 3.4 5.8 5.5 5.2 4.9 4.4

11dpw kPa 25 23 21 19 16 13 25 23 21 19 15

79CC kW 108 103 97.9 92.4 86 72.3 128 122 116 109 94.37

44.8PI kW 32.6 35.6 38.9 42.3 45.7 40.2 40.3 44 47.9 52.2 50.4

3.8qw l/s 5.1 4.9 4.7 4.4 4.1 3.4 6.1 5.8 5.5 5.2 4.5

12dpw kPa 27 25 23 21 18 13 27 25 23 21 16

81CC kW 114 109 104 97.9 87.9 73.8 135 129 123 116 96.69

43.9PI kW 33.6 36.7 40 43.5 44.2 39.1 41.5 45.3 49.4 53.7 49.1

3.9qw l/s 5.4 5.2 4.9 4.7 4.2 3.5 6.4 6.2 5.9 5.5 4.6

12dpw kPa 30 28 26 23 19 14 30 28 25 23 17

82.7CC kW 120 115 109 103 90 75.7 142 136 129 122 98.611

42.8PI kW 34.7 37.7 41.1 44.7 43.1 38.2 42.9 46.7 50.8 55.2 47.7

4.0qw l/s 5.7 5.5 5.2 4.9 4.3 3.6 6.8 6.5 6.2 5.8 4.7

13dpw kPa 33 31 28 26 20 15 33 31 28 25 17

84.1CC kW 126 121 115 109 91.8 77.4 149 143 136 126 10113

41.7PI kW 35.7 38.9 42.2 45.9 41.9 37.4 44.2 48.1 52.3 55.2 46.8

4.0qw l/s 6.0 5.8 5.5 5.2 4.4 3.7 7.1 6.8 6.5 6.1 4.8

13dpw kPa 36 34 31 28 21 15 36 33 31 27 18

86.1CC kW 132 127 121 115 93.3 78.7 156 150 143 129 10215

41PI kW 36.9 40 43.4 47.1 40.7 36.5 45.6 49.6 53.8 53.9 45.2

4.1qw l/s 6.3 6.1 5.8 5.5 4.5 3.8 7.5 7.2 6.8 6.2 4.9

14dpw kPa 40 37 34 31 21 16 40 37 34 28 18

039.1 046.1

4540353025484540353025 48TaTwout

115CC kW 139 133 126 119 111 104 163 156 148 140 1305

66.3PI kW 43.3 47.3 51.6 56.4 61.7 62.8 49.2 53.8 58.8 64.1 69.9

5.5qw l/s 6.6 6.3 6.0 5.7 5.3 4.9 7.8 7.4 7.1 6.7 6.2

13dpw kPa 24 22 20 18 16 14 25 23 21 18 16

119CC kW 147 141 134 127 119 106 172 165 157 148 1397

64.6PI kW 44.6 48.6 53 57.9 63.3 60.8 50.7 55.4 60.4 65.8 71.6

5.7qw l/s 7.0 6.7 6.4 6.0 5.7 5.1 8.2 7.9 7.5 7.1 6.6

14dpw kPa 26 24 22 20 18 15 27 25 23 21 18

122CC kW 155 149 142 134 126 109 182 174 166 157 1449

62.8PI kW 45.8 49.9 54.4 59.4 65 59.2 52.2 56.9 62 67.6 70.8

5.8qw l/s 7.4 7.1 6.8 6.4 6.0 5.2 8.7 8.3 7.9 7.5 6.9

14dpw kPa 29 27 25 22 20 15 30 28 25 23 20

125CC kW 163 157 150 142 132 111 191 183 175 166 14711

61.5PI kW 47.1 51.3 55.9 61 65.5 57.5 53.7 58.5 63.7 69.4 69.1

6.0qw l/s 7.8 7.5 7.2 6.8 6.3 5.3 9.1 8.8 8.4 7.9 7.0

15dpw kPa 32 29 27 25 22 16 33 30 28 25 20

127CC kW 172 165 158 150 134 114 201 193 184 175 15113

59.6PI kW 48.5 52.7 57.4 62.6 63.3 56.4 55.3 60.2 65.5 71.2 67.3

6.1qw l/s 8.2 7.9 7.5 7.2 6.4 5.5 9.6 9.2 8.8 8.4 7.2

16dpw kPa 35 32 30 27 22 17 36 33 31 28 21

129CC kW 180 173 166 158 137 115 211 202 193 184 15315

58.2PI kW 49.9 54.2 59 64.3 61.7 54.6 57 61.9 67.3 73.1 65.5

6.2qw l/s 8.6 8.3 7.9 7.6 6.6 5.5 10.1 9.7 9.3 8.8 7.3

16dpw kPa 38 35 33 30 23 17 39 36 33 31 22

Page 25 of 40

Page 26: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

COOLING PERFORMANCE

McEng Mono-SE-LN

052.1 061.1

4540353025484540353025 48TaTwout

157CC kW 185 177 167 155 141 132 211 206 198 187 1735

87.3PI kW 55.2 60.3 66 72.5 79.9 84.7 57.6 63.7 70.5 78.2 86.9

7.5qw l/s 8.8 8.4 8.0 7.4 6.7 6.3 10.0 9.8 9.4 8.9 8.2

12dpw kPa 23 21 19 17 14 12 21 20 18 17 14

161CC kW 196 187 177 165 150 137 222 217 209 198 1837

84.9PI kW 56.7 62 67.8 74.5 82 83.7 59.1 65.4 72.3 80.2 89.1

7.7qw l/s 9.3 8.9 8.4 7.9 7.2 6.5 10.6 10.4 10.0 9.4 8.7

13dpw kPa 25 23 21 19 16 13 23 22 20 18 16

164CC kW 206 197 187 174 159 140 234 228 220 208 1929

82.2PI kW 58.3 63.7 69.7 76.5 84.1 80.8 60.7 67.1 74.2 82.2 91.3

7.8qw l/s 9.8 9.4 8.9 8.3 7.6 6.7 11.2 10.9 10.5 9.9 9.2

13dpw kPa 28 26 24 21 18 14 25 24 22 20 18

168CC kW 217 208 197 184 168 144 245 240 231 219 19811

80.4PI kW 60 65.4 71.6 78.6 86.4 78.7 62.3 68.8 76.1 84.4 89.9

8.0qw l/s 10.4 9.9 9.4 8.8 8.0 6.9 11.7 11.5 11.0 10.5 9.5

14dpw kPa 31 28 26 23 19 15 27 26 24 22 19

171CC kW 228 218 207 194 175 147 257 251 242 229 20313

78.5PI kW 61.7 67.2 73.6 80.8 87.2 76.5 64 70.7 78.1 86.5 88.2

8.2qw l/s 10.9 10.4 9.9 9.3 8.4 7.0 12.3 12.0 11.6 11.0 9.7

14dpw kPa 33 31 28 25 21 15 30 28 27 24 19

174CC kW 239 229 217 203 179 151 269 263 253 240 20615

76.4PI kW 63.4 69.1 75.6 82.9 84.2 75 65.8 72.6 80.2 88.7 85.5

8.3qw l/s 11.4 10.9 10.4 9.7 8.5 7.2 12.9 12.6 12.1 11.5 9.8

15dpw kPa 37 34 31 27 22 16 32 31 29 26 20

073.1 087.1

4540353025484540353025 48TaTwout

203CC kW 258 247 234 220 203 192 310 296 279 260 2395

115PI kW 69.1 75.3 82.3 90.6 100 107 91.4 98.7 106 115 124

9.7qw l/s 12.3 11.8 11.2 10.5 9.7 9.1 14.8 14.1 13.3 12.4 11.4

23dpw kPa 48 44 40 36 31 28 49 45 40 35 30

210CC kW 273 262 249 234 217 205 328 313 296 276 2507

114PI kW 71.1 77.3 84.4 92.6 102 108 94.4 102 110 119 127

10.0qw l/s 13.0 12.5 11.9 11.2 10.3 9.8 15.6 14.9 14.1 13.2 11.9

24dpw kPa 53 49 45 40 35 32 54 49 45 39 33

217CC kW 289 277 264 248 230 212 346 330 312 292 2569

113PI kW 73.2 79.4 86.6 94.8 104 107 97.5 105 114 123 125

10.4qw l/s 13.8 13.2 12.6 11.9 11.0 10.1 16.5 15.8 14.9 14.0 12.2

26dpw kPa 59 55 50 45 39 34 59 54 49 44 34

221CC kW 305 292 278 263 244 218 364 347 329 308 26211

110PI kW 75.4 81.6 88.8 97 106 105 101 109 117 127 123

10.6qw l/s 14.6 14.0 13.3 12.6 11.7 10.4 17.4 16.6 15.7 14.7 12.5

26dpw kPa 65 60 55 50 44 36 65 60 54 48 36

226CC kW 321 308 293 277 258 223 382 365 346 324 26813

108PI kW 77.7 83.9 91.1 99.4 109 102 104 112 121 131 121

10.8qw l/s 15.4 14.7 14.0 13.3 12.3 10.7 18.3 17.5 16.5 15.5 12.8

28dpw kPa 71 66 61 55 48 37 71 65 59 53 37

231CC kW 338 324 309 292 271 230 401 383 363 340 27215

105PI kW 80.1 86.4 93.6 102 111 99.8 107 116 125 135 118

11.1qw l/s 16.2 15.5 14.8 14.0 12.9 11.0 19.2 18.3 17.4 16.3 13.0

29dpw kPa 78 73 67 60 53 39 78 71 65 58 39

Page 26 of 40

Page 27: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

COOLING PERFORMANCE

McEng Mono-SE-LN

102.1 118.1

4540353025484540353025 48TaTwout

234CC kW 364 346 326 303 268 222 409 396 378 355 2815

125PI kW 111 120 129 139 145 129 122 133 145 158 141

11.2qw l/s 17.3 16.5 15.5 14.4 12.8 10.6 19.5 18.9 18.0 16.9 13.4

16dpw kPa 49 45 40 35 28 20 44 41 38 34 22

243CC kW 384 366 345 320 276 231 431 416 398 367 2907

124PI kW 115 124 134 144 144 129 126 138 150 160 140

11.6qw l/s 18.3 17.4 16.5 15.3 13.1 11.0 20.5 19.9 19.0 17.5 13.8

17dpw kPa 54 49 44 39 30 22 48 45 42 36 24

249CC kW 404 385 364 339 281 237 452 437 417 373 2959

121PI kW 119 128 138 149 141 126 131 142 155 158 136

11.9qw l/s 19.3 18.4 17.4 16.2 13.4 11.3 21.6 20.9 19.9 17.8 14.1

18dpw kPa 59 54 49 43 31 23 53 50 46 37 25

254CC kW 425 405 382 357 287 243 474 458 437 379 30011

118PI kW 123 132 143 154 138 124 135 147 161 155 133

12.1qw l/s 20.3 19.4 18.3 17.0 13.7 11.6 22.7 21.9 20.9 18.1 14.3

19dpw kPa 65 59 54 47 32 24 57 54 50 38 25

258CC kW 446 425 401 371 294 248 496 479 457 386 30613

115PI kW 127 137 148 158 136 120 140 152 166 153 130

12.3qw l/s 21.3 20.3 19.2 17.7 14.1 11.9 23.7 22.9 21.8 18.5 14.7

19dpw kPa 71 65 59 51 34 25 62 59 54 40 26

265CC kW 468 446 421 376 299 255 519 500 474 393 31215

114PI kW 131 142 153 155 131 118 145 158 170 151 128

12.7qw l/s 22.4 21.3 20.1 18.0 14.3 12.2 24.8 23.9 22.7 18.8 15.0

20dpw kPa 77 71 64 52 35 26 68 63 58 41 27

Fluid: Water

Ta: Condenser inlet air temperature; Twout: Evaporator leaving water temperature (Δt 5°C)

CC: Cooling capacity; PI: Power input; qw: Fluid flow rate; dpw: Fluid pressure drop

* For working condition where dpw value is "Italic-Red Color" please contac factory

Page 27 of 40

Page 28: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPTIONS (TECHNICAL DATA)

Water Pump Kit

Single Pump (2 poles)

Low Discharge Head

Legend:

ASP = Available Static Pressure (kPa); WF = Water Flow (l/s)

Note

- the above curves are referred to the available static pressure

- when selecting the pump you have to consider the installation pressure drops

- when using mixture of water and glycol please contact the factory as above specification can change

Page 28 of 40

Page 29: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPTIONS (TECHNICAL DATA)

Single Pump (2 poles)

High Discharge Head

Legend:

ASP = Available Static Pressure (kPa); WF = Water Flow (l/s)

Note

- the above curves are referred to the available static pressure

- when selecting the pump you have to consider the installation pressure drops

- when using mixture of water and glycol please contact the factory as above specification can change

Page 29 of 40

Page 30: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPTIONS (TECHNICAL DATA)

Twin Pump (2 poles)

Low Discharge Head

Legend:

ASP = Available Static Pressure (kPa); WF = Water Flow (l/s)

Note

- the above curves are referred to the available static pressure

- when selecting the pump you have to consider the installation pressure drops

- when using mixture of water and glycol please contact the factory as above specification can change

Page 30 of 40

Page 31: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

OPTIONS (TECHNICAL DATA)

Twin Pump (2 poles)

High Discharge Head

Legend:

ASP = Available Static Pressure (kPa); WF = Water Flow (l/s)

Note

- the above curves are referred to the available static pressure

- when selecting the pump you have to consider the installation pressure drops

- when using mixture of water and glycol please contact the factory as above specification can change

Page 31 of 40

Page 32: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

DIMENSIONAL DRAWING

1:

2:

3:

4:

5:

6:

7:

8:

Compressor

Evaporator

Condenser coil

Electrical panel

Fan

Evaporator water inlet

Evaporator water outlet

Slot for power and control panel connection

LEGEND

A MLIHGB C FED

2165 1175 172 2273 501 1292McEng Mono.029.1.SE-ST

2165 1175 172 2273 501 1292McEng Mono.034.1.SE-ST

3065 1175 172 2273 501 1292McEng Mono.039.1.SE-ST

3065 1175 172 2273 501 1292McEng Mono.046.1.SE-ST

3065 1175 172 2273 501 1292McEng Mono.052.1.SE-ST

3065 1175 172 2273 501 1292McEng Mono.061.1.SE-ST

2165 1175 172 2273 501 1292McEng Mono.029.1.SE-LN

2165 1175 172 2273 501 1292McEng Mono.034.1.SE-LN

3065 1175 172 2273 501 1292McEng Mono.039.1.SE-LN

3065 1175 172 2273 501 1292McEng Mono.046.1.SE-LN

3065 1175 172 2273 501 1292McEng Mono.052.1.SE-LN

3065 1175 172 2273 501 1292McEng Mono.061.1.SE-LN

Page 32 of 40

Page 33: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

DIMENSIONAL DRAWING

1:

2:

3:

4:

5:

6:

7:

8:

Compressor

Evaporator

Condenser coil

Electrical panel

Fan

Evaporator water inlet

Evaporator water outlet

Slot for power and control panel connection

LEGEND

A MLIHGB C FED

3070 1612 172 2223 515 257 243 2236McEng Mono.073.1.SE-ST

3070 1612 172 2223 515 257 243 2236McEng Mono.087.1.SE-ST

3070 1612 172 2223 515 257 243 2236McEng Mono.102.1.SE-ST

3070 1612 172 2223 515 257 243 2236McEng Mono.118.1.SE-ST

3070 1612 172 2223 515 257 243 2236McEng Mono.073.1.SE-LN

3070 1612 172 2223 515 257 243 2236McEng Mono.087.1.SE-LN

3070 1612 172 2223 515 257 243 2236McEng Mono.102.1.SE-LN

3070 1612 172 2223 515 257 243 2236McEng Mono.118.1.SE-LN

Page 33 of 40

Page 34: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

INSTALLATION NOTES

Warning Installation and maintenance of the unit must to be performed only by qualified personnel who have

knowledge with local codes and regulations, and experience with this type of equipment. Must be avoided the unit

installation in places that could be considered dangerous for all the maintenance operations.

Handling Care should be taken to avoid rough handling or shock due to dropping the unit. Do not push or pull the

unit from anything other than the base frame. Never allow the unit to fall during unloading or moving as this may result

in serious damage. To lift the unit, rings are provided in the base frame of the unit. Spreader bar and cables should be

arranged to prevent damage to the condenser coil or unit cabinet.

Location The units are produced for outside installation on roofs, floors or below ground level on condition that the

area is free from obstacles for the passage of the condenser air. The unit should be positioned on solid foundations and

perfectly level; in the case of installation on roofs or floors, it may be advisable to arrange the use of suitable weight

distribution beams. When the units are installed on the ground, a concrete base at least 250 mm wider and longer than

the unit’s footprint should be laid. Furthermore, this base should withstand the unit weight mentioned in the technical

data table.

Space requirements The units are air-cooled, then it is important to respect the minimum distances which

guarantee the best ventilation of the condenser coils. Limitations of space reducing the air flow could cause significant

reductions in cooling capacity and an increase in electricity consumption.

To determinate unit placement, careful consideration must be given to assure a sufficient air flow across the condenser

heat transfer surface. Two conditions must be avoided to achieve the best performance: warm air recirculation and coil

starvation.

Both these conditions cause an increase of condensing pressures that results in reductions in unit efficiency and

capacity.

Moreover the unique microprocessor has the ability to calculate the operating environment of the air cooled chiller and

the capacity to optimize its performance staying on-line during abnormal conditions.

Each side of the unit must be accessible after installation for periodic service. 'Fig.1 and Fig.2' shows you minimum

recommended clearance requirements.

Vertical condenser air discharge must be unobstructed because the unit would have its capacity and efficiency

significantly reduced.

If the units are positioned in places surrounded by walls or obstacles of the same height as the units, the units should

follow the minimum recommended clearance requirements shown in 'Fig.3 and Fig.4'. In the event the obstacles are

higher than the units, the minimum recommended clearance requirements are shown in 'Fig.5 and Fig.6'. Units installed

closer than the minimum recommended distance to a wall or other vertical riser may experience a combination of coil

starvation and warm air recirculation, thus causing reduction in unit capacity and eff ic iency reductions. The

microprocessor control is proactive in response “of design condition”. In the case of single or compounded influences

restricting airflow to the unit, the microprocessor will act to keep the compressor(s) running (at reduced capacity)

rather than allowing a shut-off on high discharge pressure.

When two or more units are positioned side by side it is recommended that the condenser coils are at a minimum

distance from one another as shown in 'Fig.7 and Fig.8'; strong wind could be the cause of air warm recirculation.

For other installation solutions, consult our technicians.

The above recommended information are representative of general installation. A specific evaluation should be done

by contractor depending on the case.

Page 34 of 40

Page 35: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

INSTALLATION NOTES

Acoustic protection When noise level must meet special requirements, it is necessary to pay the maximum

attention to ensure the perfect insulation of the unit from the support base by applying appropriate vibration-

dampening devices on the unit, on the water pipes and on the electrical connections.

Page 35 of 40

Page 36: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

INSTALLATION NOTES

Storage The environment conditions have to be in the following limits:

Minimum ambient temperature:

Maximum ambient temperature:

Maximum R.H.:

-20°C

+57°C

95% not condensing

Page 36 of 40

Page 37: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

TECHNICAL SPECIFICATIONS

General The chiller will be designed and manufactured in accordance with the following European directives:

• Construction of pressure vessel 97/23/EC (PED)

• Machinery Directive 2006/42/EC

• Low Voltage 2006/95/EC

• Electromagnetic Compatibility 2004/108/EC

• Electrical & Safety codes EN 60204–1 / EN 60335-2-40

• Manufacturing Quality Standards UNI – EN ISO 9001:2004

To avoid any losses, the unit will be tested at full load in the factory (at the nominal working conditions and water

temperatures). The chiller will be delivered to the job site completely assembled and charged with refrigerant and oil.

The installation of the chiller must comply with the manufacturer’s instructions for rigging and handling equipment.

The unit will be able to start up and operate (as standard) at full load with:

- outside air temperature from ............... °C to ............... °C

- evaporator leaving fluid temperature between ............... °C and ............... °C

Refrigerant

Only HFC 134a can be used.

Performance Chiller shall supply the following performances:

• Number of chiller(s) : ............... unit(s)

• Cooling capacity for single chiller : ............... kW

• Power input for single chiller in cooling mode : ............... kW

• Heat exchanger entering water temperature in cooling mode : ............... °C

• Heat exchanger leaving water temperature in cooling mode : ............... °C

• Heat exchanger water flow : ............... l/s

• Nominal outside working ambient temperature in cooling mode : ............... °C

Operating voltage range should be 400V ±10%, 3ph, 50Hz, voltage unbalance maximum 3%, without neutral conductor

and shall only have one power connection point.

Unit description Chiller shall include as standard: one refrigerant circuit, semi-hermetic type rotary single screw

compressor, electronic expansion device (EEXV), refrigerant direct expansion plate to plate heat exchanger, air-cooled

condenser section, R134a refrigerant, lubrication system, motor starting components, discharge line shut-off valve,

suction line shut-off valve, control system and all components necessary for safe and stable unit operation.

Chiller will be factory assembled on a robust base-frame made of galvanized steel, protected by an epoxy paint.

Sound level and vibrations Sound pressure level at 1 meter distance in free field, semispheric conditions, shall

not exceed ………dB(A). The sound pressure levels must be rated in accordance to ISO 3744 (other types of rating can

not be used).

Vibration on the base frame should not exceed 2 mm/s.

Dimensions

Unit dimensions shall not exceed following indications:

- Unit length ............... mm

- Unit width ............... mm

- Unit height ............... Mm

Compressors (Symmetric) The unit shall be equipped with:

• Semi-hermetic, single-screw type with one main helical rotor meshing with gaterotor. The gaterotor wil l be

constructed of a carbon impregnated engineered composite material. The gaterotor supports will be constructed of cast

iron.

Page 37 of 40

Page 38: Air cooled screw chillers - McEnergy Mono_Rev. 7.0.pdf

TECHNICAL SPECIFICATIONS

Compressors (Asymmetric) The unit shall be equipped with:

• Semi-hermetic, single-screw asymmetric type with one main helical rotor meshing with two diametrical opposed

gaterotors. The gaterotors’ contact elements shall be constructed of composite material designed for extended life.

Electrical motor shall be 2-pole, semi-hermetic, squirrel-cage induction type and cooled by suction gas.

• The oil injection shall be used in order to get high EER (Energy Efficiency Ratio) also at high condensing pressure and

low sound pressure levels in each load condition.

• The compressor shall be provided with a built in, high efficiency, mesh type oil separator and oil filter.

• Refrigerant system differential pressure shall provide oil injection on all moving compressor parts to correctly

lubricate them. Electrical oil pump lubricating system is not allowed.

• Compressor cooling must be done by refrigerant l iquid injection. An external dedicated heat exchanger and

additional piping to carry the oil from compressor to heat exchanger and viceversa is not allowed.

• The compressor shall be direct electrical driven, without gear transmission between the screw and the electrical

motor.

• The compressor casing shall be provided with ports to realize economized refrigerant cycles.

• The compressor must be protected by a temperature sensor for high discharge temperature and an electrical motor

thermistor for high winding temperature.

• The compressor shall be equipped with an electric oil heater.

• The compressor shall be fully field serviceable. Compressor that must be removed and returned to the factory for

service shall be unacceptable.

Evaporator (PHE) The units shall be equipped with a direct expansion plate to plate type evaporator.

• The evaporator will be made of of stainless steel brazed plates and shall be linked with an electrical heater to prevent

freezing down to -28°C ambient temperature, controlled by a thermostat and shall be insulated with flexible, closed cell

polyurethane insulation material (20-mm thick).

• The evaporator will have 1 refrigerant circuit for each compressor.

• The water connections shall be VICTAULIC type connections as standard to ensure quick mechanical disconnection

between the unit and the hydronic network.

• The evaporator will be manufactured in accordance to PED approval.

• Flow switch will be standard factory mounted.

• Water filter will be standard.

Condenser coil The unit shall be equipped with condenser coils constructed with internally finned seamless copper

tubes and arranged in a staggered row pattern and mechanically expanded into lanced and rippled aluminum fins with

full fin collars for higher efficiencies. The space between the fins is given by a collar that will increase the surface area

in connection with the tubes, protecting them from ambient corrosion.

• The condenser coils will have an integral subcooler circuit that provides sufficient subcooling to effectively eliminate

the possibility of l iquid flashing and increase the unit's efficiency with 5% to 7% without increasing in energy

consumption.

• The condenser coils shall be leak-tested and submitted to a pressure test with dry air.

Condenser fans The condenser fans used in conjunction with the condenser coils, shall be propeller type with glass

reinforced resin blades for higher efficiencies and lower sound. Each fan shall be protected by a fan guard.

• The air discharge shall be vertical and each fan must be coupled to the electrical motor, supplied as standard to IP54

and capable to work to ambient temperatures of - 20°C to + 65°C.

• The condenser fans shall have as a standard a thermally protection by internal thermal motor protection and

protected by circuit braker installed inside the electrical panel as a standard.

Refrigerant circuit The unit shall have one refrigerant circuit.

• The circuit shall include as standard: electronic expansion device pi loted by unit’s microprocessor control,

compressor discharge shut-off valve, liquid line shut-off valve, sight glass with moisture indicator, replaceable filter

drier, charging valves, high pressure switch, high and low pressure transducers, oil pressure transducer and insulated

suction line.

Condensation control The units will be provided with an automatic control for condensing pressure which ensures

the working at low external temperatures down to - …………… °C, to maintain condensing pressure.

• The compressor automatically unloads when abnormal high condensing pressure is detected. This to prevent the

shutdown of the refrigerant circuit (shutdown of the unit) due to a high-pressure fault.

Low sound unit configurations (on request) The unit compressor shall be connected with unit’s metal base

frame by rubber antivibration supports to prevent the transmission of vibrations to all metal unit structure, in order to

control the unit sound.

• The chiller shall be provided with an acoustical compressor enclosure. This enclosure shall be realized with a light,

corrosion resisting aluminum structure and metal panels. The compressor sound-proof enclosure shall be internally

fitted with flexible, multi-layer, high density materials.

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TECHNICAL SPECIFICATIONS

Hydronic kit options (on request) The hydronic module shall be integrated in the chiller chassis without

increasing its dimensions and includes the following elements: centrifugal pump with motor protected by a circuit

breaker installed in control panel, water filling system with pressure gauge, safety valve, drain valve.

• The hydronic module shall be assembled and wired to the control panel.

• The water piping shall be protected against corrosion and freezing and insulated to prevent condensation.

• A choice of two pump types shall be available:

- in-line single pump

- in-line twin pumps.

Electrical control panel Power and control shall be located in the main panel that will be manufactured to ensure

protection against all weather conditions.

• The electrical panel shall be IP54 and (when opening the doors) internally protected against possible accidental

contact with live parts.

• The main panel shall be fitted with a main switch interlocked door that shuts off power supply when opening.

• The power section will include compressors and funs protection devices, compressors and fans starters and control

circuit power supply.

Controller The controller will be installed as standard and it will be used to modify unit set-points and check control

parameters.

• A built-in display will shows chiller operating status plus temperatures and pressures of water, refrigerant and air,

programmable values, set-points.

• A sophisticated software with predictive logic, will select the most energy efficient combination of compressors, EEXV

and condenser fans to keep stable operating conditions to maximize chiller energy efficiency and reliability.

• The controller will be able to protect critical components based on external signals from its system (such as motor

temperatures, refrigerant gas and oil pressures, correct phase sequence, pressure switches and evaporator). The input

coming from the high pressure switch cuts all digital output from the controller in less than 50ms, this will be an

additional security for the equipment.

• Fast program cycle (200ms) for a precise monitoring of the system.

• Floating point calculations supported for increased accuracy in P/T conversions.

Controller main features Controller shall be garantee following minimu functions:

• Management of the compressor stepless capacity and fans modulation.

• Chiller enabled to work in partial failure condition.

• Full routine operation at condition of:

- high ambient temperature value

- high thermal load

- high evaporator entering water temperature (start-up)

• Display of evaporator entering/leaving water temperature.

• Display of Outdoor Ambient Temperature.

• Display of condensing-evaporating temperature and pressure, suction and discharge superheat for each circuit.

• Leaving water evaporator temperature regulation (temperature tolerance = 0,1°C).

• Compressor and evaporator pumps hours counter.

• Display of Status Safety Devices.

• Number of starts and compressor working hours.

• Optimized management of compressor load.

• Fan management according to condensing pressure.

• Re-start in case of power failure (automatic / manual).

• Soft Load (optimized management of the compressor load during the start-up).

• Start at high evaporator water temperature.

• Return Reset (Set Point Reset based on return water temperature).

• OAT (Outside Ambient temperature) Reset.

• Set point Reset (optional).

• Application and system upgrade with commercial SD cards.

• Ethernet port for remote or local servicing using standard web browsers.

• Two different sets of default parameters could be stored for easy restore.

High Level Communications Interface (on request) The chiller shall be able to communicate to BMS

(Building Management System) based on the most common protocols as:

- ModbusRTU

- LonWorks, now also based on the international 8040 Standard Chiller Profile and LonMark Technology

- BacNet BTP certifief over IP and MS/TP (class 4) (Native)

- Ethernet TCP/IP.

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The present publication is drawn up by of information only and does not constitute an offer binding upon McQuay. McQuay has compiled

the content of this publication to the best of its knowledge. No express or implied warranty is given for the completeness, accuracy,

reliability or fitness for particular purpose of its content, and the products and services presented therein. Specifications are subject to

change without prior notice. McQuay explicitly rejects any liability for any direct or indirect damage, in the broadest sense, arising from or

related to the use and/or interpretation of this publication. All content is copyrighted by McQuay.

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www.mcquayeurope.com"