Lennox MWC 180 User guide

lennoxemeia.com
MWC
MWR
APPLICATION
GUIDE
Water cooled chillers
Heat pumps
180 720 kW
MCW-AGU-0410-E

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5
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18
Application Guide •MWC-0410-E • 1 •
APPLICATION GUIDE
Ref : MWC-AGU-0410-E
TABLE OF CONTENTS
Product designed and manufactured under a quality management system certified ISO 9001.
Our products comply with the European standards.
All the technical and technological information contained in this manual, including any drawing and technical descriptions provided
by us, remain the property of Lennox and must not be utilised (except in operation of this product), reproduced, issued to or made
available to third parties without the prior written agreement of Lennox.
GENERAL
Features and benefits
Options and accessories
Model number description
GENERAL DATA
General data
Pressure drops
Hydraulic data
Acoustic data
Operating limits
ELECTRICAL DATA
Electrical tables
PERFORMANCES
MWC - Cooling mode
MRC - Cooling mode
MWC - Heating mode
DIMENSIONAL DATA
Dimensional data
Our company is member of the Eurovent certification program.
The MWC™ Lennox chillers are tested and rated in accordance with Eurovent certification program.

• 2 • Application Guide •MWC-0410-E
FEATURES AND BENEFITS
Water cooled liquid chiller for indoor installation
GENERAL CHARACTERISTICS OF THE UNIT
The MWC unit is designed for industrial and commercial
applications where customers require reduced total cost of
ownership for new air conditioning equipment.
As main characteristics the MWC unit offers multi scroll
R410A compressors with two circuits for safety operation and
oversized heat exchangers for high full and part load energy
performances (Class B efficiency / ESEER > 6.0).
The MWC is the solution for indoor installation. Thanks to
very compact dimensions and limited footprint MWC can be
installed easily into any technical room.
The MWC is available in 2 main versions to meet all customer
requirements and applications :
- MWC version is the water-cooled chiller. This version can
be used for air conditioning applications in association with
a separate dry-cooler or using ground water. The MWC ver-
sion can also be used for heating applications. With the “hot
water set point control” option the MWC range can supply
hot water up to +50°C.
- MRC version is the split version without condenser. This
version can be used for air conditioning applications in as-
sociation with a remote air-cooled condenser
REFRIGERANT CIRCUIT
MWC is using R410A refrigerant in 2 independent circuits that
allows operation at 50% of the capacity in case of issue on one
circuit.
Each circuit includes:
- A refrigerant charge reduced by 30% thanks to the use of
R410A combined with plate heat exchanger
- Suction piping with thermal insulation.
- Moisture sight glass on the MRC version
- Filter drier with removable cartridge filter.
- Thermostatic valve or electronic expansion valve (optional
from size 180 to 570, standard on size 650 & 720).
- Temperature sensors and pressure transducers.
- Leak-tight refrigerant circuit with brazing carried out under
nitrogen by certified technicians.
- Each refrigerant circuit is pressure and leak tested with a
Hydrogen/Nitrogen mixture, and vacuumed before being
charged with refrigerant. All units are then subjected to a
complete functional and operational run test to guarantee
perfect sealing before leaving the factory.
COMPRESSOR
MWC isusing R410Avibration-free compliant®scroll compressors
to guarantee a low operating sound level, a high durability and
reliability and no maintenance.
- Exclusive Compliant® Scroll design with both axial and radial
compliance to increase compressor operation tolerance to
liquid refrigerant, substantially improving durability and re-
liability.
- Motor cooled by suction gas.
- Electronic control of the compressor discharge tempera-
ture.
- Motor protection device against high temperature or over
current situations.
- Discharge non-return valve.
- Compressors assembly installed on an independent chassis
supported by anti-vibration mountings.
- Optional sound-proofed panel enclosures to reduce noise
emissions.
WATER HEAT EXCHANGER (EVAPORATOR
AND CONDENSER)
MWC is using stainless steel brazed plate heat exchangers with
true dual circuit.
- Copper brazed stainless steel plate heat exchanger.
- 13 mm closed cell thermal foam insulation.
- Evaporator protected against freezing risks thanks to an
electronic water flow switch
- Condenser protected against low condensing temperature
thanks to a 0-10 V output signal available from the controller
to control a condenser water inlet valve (Not from Lennox
supply).
CASING/CHASSIS
- Chassis made of galvanised steel sheet metal painted with
a RAL 7016 (grey) powdered polyester paint.
- Optional casing with removable panels made of galvanised
steel sheet metal painted with a RAL 7016 (grey) powdered
polyester paint.

Application Guide •MWC-0410-E • 3 •
FEATURES AND BENEFITS
ELECTRICAL BOX
The MWC is designed for 400V/3/50Hz supply.
- Unit electrical cabinet, components and wiring in compliance
with EN 60204-1 electrical directive.
- 400V/3/50Hz power supply (without neutral) with a single
point of power connection.
- IP24 protection class.
- Recognized brand electrical components for ease of main-
tenance.
- Main on/off switch mounted on the front panel.
- DC50 user interface mounted on the front panel.
- 400/24 V transformer to supply the control circuit.
- Labelled electrical wires to facilitate maintenance and dia-
gnostic.
- Optional power and control circuit for the pumps.
CONTROL
CLIMATIC™ microprocessor based control is providing the
following functions:
- 4 scheduling time zones per day over 7 days to allow energy
consumption management according to the building use and
environmental constraints.
- PI control of the water temperature with operating time
equalisation of the compressors.
- Intelligent advanced control algorithm to protect the compres-
sors against excessive short-cycling and to allow operation
of the unit without buffer tank in most comfort air conditioning
applications (e.g. unit with fan-coils). Refer to minimum ins-
tallation water loop volume recommendations.
- Water pump control with operating time equalization and
automatic change-over in case of a pump fault (Twin pump
only).
- Master/slave or cascade control of two chillers operating
in parallel with operating time equalization and automatic
change-over in case of a unit fault.
CLIMATIC™ is pre-factory configured with default settings
allowing a fast commissioning on site. The DC50™ user interface
with graphical display is easy to use, intuitive. Main customer
parameters can be read or modified without main power shut-off
(Entering/leaving water temperatures, alarms, water set-points,
high and low pressure readings).
The DS50™ service display (optional) is a .plug and play"
controller that allows service people to read and modify all
unit parameters (Unit settings, operating time and number of
compressor starts, low and high pressure reading, read the
history of last 32 faults...).
COMMUNICATION
The control board is equipped with a RS485 serial communication
port to allow remote management through communication
bus.
According to the wished communication protocol, our control
board can be fitted with ModBUS®, LonWorks® or BacNET®
communication interface (options).
The main control board has free dry contacts that allow remote
control of the unit by wired cable:
- Remote on/off of the unit.
- Remote alarm reset to re-start the unit.
- Alarm or alert indications.
- Free customer contact.
With the optional extension board BE50, it is possible to get
additional customized digital or analog inputs/outputs for remote
control of the unit:
- Fault pumps (dry contact).
- Operation indication at 100% on circuit 1 or 2 (dry
contact).
- Dual water set-point management (dry contact).
- Force heating or cooling mode (24V AC input).
- Power limitation by disabling circuit 1 or 2 (24V AC input).
- Force unoccupied mode (24V AC input).
- Water set-point offset based on a 4-20mA signal.
DIRECTIVES
The unit is built to meet European norms and standards &
Eurovent certiFIcation performance standards.
. DI 97/23/CE Pressure Equipment Directive.
. DI 98/37/CE Machinery Directive.
. DI 73/23/CE Low Voltage Directive.
. DI 89/336/CE Electro Magnetic Compatibility Directive
. EN 378-2 Safety and Environmental Directive.
. The European Restriction of the Use of Certain Hazardous-
Substances (RoHS).

MWC/MRC
180 ►720
MWC/MRC
180 ►720
MWC
180 ►720
MWC
180 ►720
MWC
180 ►570
MWC/MRC
180 ►720
MWC
180 ►720
MWC/MRC
180 ►720
MWC
180 ►720
MWC
180 ►720
MWC/MRC
180 ►720
MWC/MRC
180 ►720
.MWC/MRC
180 ►720
MWC/MRC
180 ►720
• 4 • Application Guide •MWC-0410-E
OPTIONS AND ACCESSORIES
OPTIONS DESCRIPTION ADVANTAGES MODELS
Control/Power electrical equipment of
single evaporator pump
Unit equipped with electrical power
and control circuit for one single
speed pump
Quick start-up on job site.
Control/Power electrical equipment of
dual evaporator pump
Unit equipped with electrical power
and control circuit for dual single
speed pumps.
Quick start-up on job site.
Control/Power electrical equipment of
single condenser pump
Unit equipped with electrical power
and control circuit for one single
speed pump
Quick start-up on job site.
Control/Power electrical equipment of
dual condenser pump
Unit equipped with electrical power
and control circuit for dual single
speed pumps.
Quick start-up on job site.
Electronic expansion valve
Unit equipped with an electronic
expansion valve for smooth operation
in every temperature conditions
Allows applications with changing
temperature conditions.
Evaporator filter (supplied loose) 1000 microns water filter delivered
with piping and Victaulic connections.
This protection must be fitted to
protect the evaporator from any
possible impurities.
Condenser filter (supplied loose) 1000 microns water filter delivered
with piping and Victaulic connections.
This protection must be fitted to
protect the condenser from any
possible impurities.
Evaporator flange connections
(supplied loose)
Two connection sleeves with Victaulic
groove and flange on opposite side.
Allow easy connection with flanges
on customer side.
Condenser flange connections
(supplied loose)
Two connection sleeves with Victaulic
groove and flange on opposite side
Allow easy connection with flanges
on customer side.
Hot water set-point control (Heat
pump mode)
Unit equipped with insulated heat
exchanger and hot water sensor on
condenser side for heating purpose.
Allow heat pump operation.
DC50™ remote comfort display
(supply loose)
Customer display located at 600
meters maximum from the unit.
Remote customer parameter reading
and modification.
DS50™ service display (supply
loose)
Plug and play display delivered with 1
meter cable and connector for quick
connection on Climatic controller.
Display for service technicians only.
Modbus communication interface Communication card using ModBus/
JBus protocol
Communication interface with a
building management system.
LonWorks® communication interface Communication card using LonTalk®
protocol.
Communication interface with a
building management system.

MWC/MRC
180 ►720
MWC/MRC
180 ►720
MWC/MRC
180 ►720
MWC/MRC
180 ►720
MWC/MRC
180 ►720
M
W
C
200
D
N
M
1
M400V/3/50 Hz
Application Guide •MWC-0410-E • 5 •
OPTIONS AND ACCESSORIES
OPTIONS DESCRIPTION ADVANTAGES MODELS
BACnet® communication interface Communication card using Bacnet®
protocol.
Communication interface with a
building management system.
Adalink™ supervision (Customer
friendly web based supervision)
Electronic board with RS485 cables,
RJ11 phone cable, Ethernet cable
and power supply cable.
Remote supervision of the unit via an
intuitive web page.
BE50™ extension board for
additional inputs/outputs
Electronic extension board with
additional analog inputs (4), digital
inputs (4) and digital outputs (4). See
control manual.
Relay card for remote control and
alarm report using dry contacts, 24
Vac or 4-20 mA signals.
Anti-vibration mounts (supplied
loose)
Rubber anti-vibration mounts to be
mounted under the unit.
Reduction of the transmission of
vibration to the ground.
Panel enclosure (compressors)
Unit equipped with removable panels
around the compressors to reduce
sound level.
Reduction of the unit sound power
level.
MODEL NUMBER DESCRIPTION
EXAMPLE : MWC 200D
Medium
W = Water cooled
R = Remote condenser
C = Cooling mode
Cooling capacity in kW
Number of circuits :
D= 2 circuits
Non ducted
R410 A refrigerant
Revision number

MWC™ 180 230 280 330 380
kW 186,1 232,8 280,7 333,6 380,4
kW 39,3 49,9 59,7 70,9 81,0
A 70,6 86,6 101,1 118,1 133,2
EER 4,74 4,66 4,70 4,70 4,70
ESEER (2) 6,74 6,31 6,38 6,25 6,03
m3/h 32,0 40,1 48,3 57,4 65,4
kPa 34,9 28,9 40,7 31,5 40,2
m3/h 37,2 46,7 56,2 66,8 76,2
kPa 46,2 38,3 30,3 41,8 40,5
kW 196,5 246,4 296,9 351,9 401,7
kW 48,5 61,5 73,1 86,9 99,1
A 86,6 110,0 130,7 155,3 177,1
4,05 4,00 4,06 4,05 4,05
m3/h 33,8 42,4 51,1 60,5 69,1
kPa 38,6 32,1 25,4 34,8 33,7
m3/h 32,0 40,1 48,3 57,4 65,4
kPa 34,9 28,9 40,7 31,5 40,2
44444
%20-50-75-
100%
21-43-62-83-
100%
21-36-53-71-
85-100%
15-46-61-87-
100%
25-50-75-
100%
l(2 x 3,2)
+ (2 x 3,2)
(3,2+6,3)
+ (2 x 3,2)
(3,2+6,3)
+ (3,2+6,3)
(2 x 6,3)
+ (3,2+6,3)
(2 x 6,3)
+ (2 x 6,3)
R410A
22222
kg8 12141422
l13 24 35 35 43
kPa 600 600 600 600 600
4" 4" 4" 4" 4"
l13 24 24 35 35
kPa 600 600 600 600 600
4" 4" 4" 4" 4"
dB(A) 81 87 89 90 92
400V / III / 50 Hz
A 266,9 402,9 431,7 460,1 488,3
A 123,8 152,2 181,0 209,4 237,6
mm 2150 2150 2150 2150 2150
mm 820 820 820 820 820
mm 1645 1870 1870 1870 1870
m² 1,8 1,8 1,8 1,8 1,8
kg 756 974 1158 1328 1534
kg 736 914 1088 1248 1444
MWC
• 6 • Application Guide •MWC-0410-E
Cooling mode
Cooling capacity (1)
Power input (1)
Full load amps (1)
Evaporator water flow (1)
Evaporator pressure drop (1)
Condenser water flow (1)
Condenser pressure drop (1)
Heating mode
Heating capacity (3)
Power input (3)
Full load amps (3)
COP
Condenser water flow (3)
Condenser pressure drop (3)
Evaporator water flow (3)
Evaporator pressure drop (3)
Compressor Scroll - Hermetic
Number of compressor nr
Capacity steps
Oil charge per compressor
Oil type type MOBIL EAL Arctic 22CC or ICI EMKARATE RL32CF
Refrigerant
Expansion type Thermostatic expansion valve
Number of circuit nr
Charge per circuit
Condenser (Heating mode) AISI 316 stainless steel plate brazed with copper heat exchanger
Water volume
Water operating pressure
Hydraulic connections Victaulic
Water inlet/outlet Inches
Evaporator (Cooling mode) AISI 316 stainless steel plate brazed with copper heat exchanger
Water volume
Water operating pressure
Hydraulic connections Victaulic
Water inlet/outlet Inches
Acoustic
Global sound power level (1)
Electrical data
Start-up intensity
Maximum current
Dimensions
Length
Width
Height
Footprint
Operating weight
Shipping weight
GENERAL DATA
All data are at Eurovent conditions :
(1) Gross cooling capacity with 12/7°C evaporator water temperature and
30/35°C condenser water temperature.
(*) Except for MWC 720 :13/7°C evaporator water temperature.
(2) ESEER according to EN14511 Eurovent calculation method.
(3) Gross heating capacity with 40/45°C condenser water temperature and 10°C
evaporator water inlet, with the same evaporator water flow as in cooling
mode.
OPERATING LIMITS on page 13
COOLING ONLY

MWC™ 450 510 570 650 720 (*)
kW 442,9 499,0 570,3 642,3 715,5
kW 95,0 108,7 122,3 140,6 161,1
A 154,0 177,6 201,0 230,9 264,5
EER 4,66 4,59 4,66 4,57 4,44
ESEER (2) 6,04 6,04 6,09 5,97 5,67
m3/h 76,2 85,9 98,1 110,5 102,6
kPa 40,4 50,5 46,0 57,7 50,0
m3/h 88,7 100,4 114,4 129,3 143,7
kPa 43,6 51,0 61,6 34,0 41,5
kW 468,3 530,4 602,6 682,1 750,6
kW 116,3 133,0 149,7 169,9 192,8
A 207,9 237,8 267,5 303,8 344,6
4,03 3,99 4,03 4,01 3,89
m3/h 80,6 91,2 103,7 117,4 129,1
kPa 36,4 42,6 51,1 28,4 34,0
m3/h 76,2 85,9 98,1 110,5 102,6
kPa 40,4 50,5 46,0 57,7 50,0
66666
%18-36-53-70-
85-100%
16-37-51-70-
83-100%
18-36-53-70-
85-100%
16-37-52-70-
83-100%
18-37-53-70-
85-100%
l(3 x 6,8)
+ (3 x 6,8)
(3 x 6,8)
+ (3 x 6,3)
(3 x 6,3)
+ (3 x 6,3)
(3 x 6,3)
+ (3 x 6,3)
(3 x 6,3)
+ (3 x 6,3)
R410A
22222
kg 27 29 31 30 30
l52 56 61 77 77
kPa 600 600 600 600 600
5" 5" 5" 5" 5"
43 43 61 61 61
600 600 600 600 600
5" 5" 5" 5" 5"
dB(A) 92 93 93 96 97
400V / III / 50 Hz
A 495,9 563,1 606,9 734,3 778,4
A 268,6 312,4 356,2 400,3 444,4
mm 2200 2200 2200 2200 2200
mm 1200 1200 1200 1200 1200
mm 1870 1870 1870 1870 1870
m² 2,6 2.6 2.6 2.6 2.6
kg 1984 2100 2240 2440 2480
kg 1894 1990 2110 2270 2310
MWC
Application Guide •MWC-0410-E • 7 •
GENERAL DATA
Cooling mode
Cooling capacity (1)
Power input (1)
Full load amps (1)
Evaporator water flow (1)
Evaporator pressure drop (1)
Condenser water flow (1)
Condenser pressure drop (1)
Heating mode
Heating capacity (3)
Power input (3)
Full load amps (3)
COP
Condenser water flow
Condenser pressure drop
Evaporator water flow
Evaporator pressure drop
Compressor Scroll - Hermetic
Number of compressor nr
Capacity steps
Oil charge per compressor
Oil type type MOBIL EAL Arctic 22CC or ICI EMKARATE RL32CF
Refrigerant
Expansion type Thermostatic expansion valve Electronic
expansion valve
Number of circuit nr
Charge per circuit
Condenser (Heating mode) AISI 316 stainless steel plate brazed with copper heat exchanger
Water volume
Water operating pressure
Hydraulic connections Victaulic
Water inlet/outlet Inches
Evaporator (Cooling mode) AISI 316 stainless steel plate brazed with copper heat exchanger
Water flow (1)
Water volume
Hydraulic connections Victaulic
Water inlet/outlet Inches
Acoustic
Global sound power level (1)
Electrical data
Start-up intensity
Maximum current
Dimensions
Length
Width
Height
Footprint
Operating weight
Shipping weight
All data are at Eurovent conditions :
(1) Gross cooling capacity with 12/7°C evaporator water temperature and
30/35°C condenser water temperature.
(*) Except for MWC 720 :13/7°C evaporator water temperature.
(2) ESEER according to EN14511 Eurovent calculation method.
(3) Gross heating capacity with 40/45°C condenser water temperature and 10°C
evaporator water inlet, with the same evaporator water flow as in cooling
mode.
OPERATING LIMITS on page 13
COOLING ONLY

MRC™ 180 230 280 330 380
kW 161.1 202.0 241.9 288.7 328.5
kW 49.7 63.0 76.2 89.4 102.5
A 89.3 109.3 129.0 148.9 168.5
EER 3.24 3.21 3.18 3.23 3.20
m3/h 26.8 22.3 31.0 24.1 30.6
kPa 148.3 186.3 223.3 266.4 303.3
44444
%25-50-75-
100%
21-43-62-83-
100%
21-36-53-71-
85-100%
15-46-61-87-
100%
25-50-75-
100%
l(2 x 3,2)
+ (2 x 3,2)
(3,2 + 6,3)
+ (2 x 3,2)
(3,2 + 6,3)
+ (3,2 + 6,3)
(2 x 6,3)
+ (3,2 + 6,3)
(2 x 6,3)
+ (2 x 6,3)
R410A
22222
% 50-50% 60-40% 50-50% 57-43% 50-50%
7/8" 1" 1/8 - 7/8" 2 x 1" 1/8 2 x 1" 1/8 2 x 1"1/8
1" 1/8 1" 3/8 - 1" 1/8 2 x 1" 3/8 2 x 1" 3/8 2 x 1" 3/8
l1324243535
kPa 600 600 600 600 600
4" 4" 4" 4" 4"
dB(A) 81 87 89 90 92
400V / III / 50Hz
A 266.9 402.9 431.7 460.1 488.3
A 123.8 152.2 181.0 209.4 237.6
mm 2150 2150 2150 2150 2150
mm 820 820 820 820 820
mm 1645 1870 1870 1870 1870
m² 1.8 1.8 1.8 1.8 1.8
kg 650 810 950 1120 1290
kg 620 770 910 1080 1240
MRC
• 8 • Application Guide •MWC-0410-E
GENERAL DATA
Cooling mode
Cooling capacity (1)
Power input (1)
Full load amps (1)
Evaporator water flow (1)
Evaporator pressure drop (1)
Compressor Scroll - Hermetic
Number of compressor nr
Capacity steps
Oil charge per compressor
Oil type type MOBIL EAL Arctic 22CC or ICI EMKARATE RL32CF
Refrigerant
Expansion type Thermostatic expansion valve
Number of circuit nr
Capacity per circuit C1/C2
Refrigerant connections
Liquid line Inches
Discharge line Inches
Evaporator AISI 316 stainless steel plate brazed with copper heat exchanger
Water volume
Water operating pressure
Hydraulic connections Victaulic
Water inlet/outlet Inches
Acoustic
Global sound power level (1)
Electrical data
Start-up intensity
Maximum current
Dimensions
Length
Width
Height
Footprint
Operating weight
Shipping weight
All data are at Eurovent conditions :
(1) Gross cooling capacity with 12/7°C water temperature
(*) Except for MWC 720 :13/7°C evaporator water temperature. OPERATING LIMITS on page 13
COOLING ONLY