McQuay MWM-LW User manual

TECHNICALMANUAL
Chilled Water Fan Coil Units
MWM, MCK, MCM, MCC, MDB Series
MWM-LW MCK-EW
MCK-CW
MCC-CW
MCM-DW/EW
MDB-BW
V1

Table of Contents
“McQuay” is a registered trademark of McQuay International. All rights reserved.
@ 2013 McQuay International. All rights reserved throughout the world.
Bulletin illustrations cover the general appearance of McQuay International products at the time of publication.
We reserve the right to change design and construction specifications at any time without notice.
Table of Contents
Nomenclature......................................................................................................................1
Application Information .....................................................................................................9
Installation Guide.........................................................................................................10
Sound Data........................................................................................................................15
NC Curve.....................................................................................................................22
Selection Process.............................................................................................................43
Engineering & Physical Data...........................................................................................58
Outlines & Dimensions ....................................................................................................69
Wiring Diagrams .............................................................................................................101
Service & Maintenance .................................................................................................. 116
Troubleshooting ............................................................................................................. 117

Nomenclature
1
Nomenclature
(Wall Mounted Fan Coil Unit)
M WM 10 L W – A C E D A - R
Brand
M : McQuay
Product Type
WM : Wall Mounted
Operating Mode
E : Cooling Only
H : Heatpump
Size (Cooling/Heating)
07 : 8,300/11,000 btu/hr
10 : 9,200/12,000 btu/hr
15 : 11,300/15,000 btu/hr
20 : 15,500/20,500 btu/hr
25 : 18,000/25,000 btu/hr
Product Series
L : L series
Product Specification Variation
A : First Issue
Grille
D : Grille D
Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
K : 60Hz / 1Ph / 208-230V
Model
W : Chilled Water Fan Coil
Market Region
C : Export with CE Mark
RoHS Compliance

Nomenclature
2
Nomenclature
(Cassette Fan Coil Unit C series)
M CK 10 C W – A X AB - R
Brand
M : McQuay
Product Type
CK : Ceiling Cassette
Size (Cooling/Heating)
10 : 8,500/12,000 btu/hr
15 : 14,000/16,000 btu/hr
20 : 15,500/18,000 btu/hr
Product Series
C : C series
Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
Model
W : Chilled Water Fan Coil
Type of ref. connection
X : Not applicable
RoHS Compliance
Product Specification Variation

Nomenclature
3
Nomenclature
(Cassette Fan Coil Unit A series)
M CK 25 A W – A X AB - R
Brand
M : McQuay
Product Type
CK : Ceiling Cassette
Size (Cooling/Heating)
20 : 22,500 / 28,500 btu/hr
25 : 25,500 / 32,000 btu/hr
30 : 30,000 / 37,500 btu/hr
40 : 33,500 / 40,500 btu/hr
50 : 36,500 / 44,000 btu/hr
Product Series
A : A series Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
Model
W : Chilled Water Fan Coil
Type of ref. connection
X : Not applicable
RoHS Compliance
Product Specification Variation
Piping
H : 4 pipes system

Nomenclature
4
Nomenclature
(Ceiling Cassette E series)
M CK 20 E W – A E C A A - R
Brand
M : McQuay
Product Type
CK : Ceiling Cassette
Controller
C : W3 Control Module with DC swing
Size (Cooling/Heating)
20 : 20,000 / 28,000 btu/hr
25 : 25,000 / 33,600 btu/hr
30 : 30,000 / 38,300 btu/hr
40 : 38,000 / 45,500 btu/hr
50 : 43,000 / 52,000 btu/hr
Product Series
E : E series
Product Specification Variation
A : First Issue
Motor
A : AC motor
Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
Model
W : Chilled Water Fan Coil
Market Region
E : Export w/o marking
RoHS Compliance

Nomenclature
5
Nomenclature
(Ceiling Mounted D series)
M CM 25 D W – A X AB - R
Brand
M : McQuay
Product Type
CM : Ceiling Mounted
Size (Cooling/Heating)
20 : 17,000 / 22,000 btu/hr
25 : 20,800 / 25,900 btu/hr
30 : 24,600 / 28,000 btu/hr
40 : 31,200 / 42,300 btu/hr
50 : 45,000 / 51,500 btu/hr
Product Series
D : D series Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
Model
W : Chilled Water Fan Coil
Type of ref. connection
X : Not applicable
RoHS Compliance
Product Specification Variation

Nomenclature
6
Nomenclature
(Ceiling Mounted E series)
M CM 15 E W – A X AB - R
Brand
M : McQuay
Product Type
CM : Ceiling Mounted
Size (Cooling/Heating)
10 : 15,500 / 19,500 btu/hr
15 : 20,300 / 25,000 btu/hr
20 : 21,000 / 28,000 btu/hr
Product Series
E : E series Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
Model
W : Chilled Water Fan Coil
Type of ref. connection
X : Not applicable
RoHS Compliance
Product Specification Variation

Nomenclature
7
Nomenclature
(Ceiling Concealed)
CC 010 C
MW – A X AC – R
RoHs Compliance
Brand
M : McQuay
Product Type
CC : Ceiling Concealed
Size (Cooling/Heating)
010 : 9,900/11,500 btu/hr
015 : 11,600/15,000 btu/hr
020 : 18,000/23,000 btu/hr
025 : 22,500/29,000 btu/hr
028 : 26,000/33,000 btu/hr
030 : 28,000/36,000 btu/hr
038 : 35,200/43,000 btu/hr
040 : 38,000/46,000 btu/hr
050 : 47,000/57,000 btu/hr
060 : 54,000/67,000 btu/hr
Type of ref. connection
X : Not applicable
F : For Flare
Product Series
C : C series
Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
Model
W : Chilled Water Fan Coil
Product Specification Variation

Nomenclature
8
Nomenclature
(Ducted Blower B series)
M DB 75 B W – A X AB - R
Size (Cooling/Heating)
75 : 75,600 / 78,000 btu/hr
100 : 95,000 / 97,500 btu/hr
125 : 125,000 / 138,000 btu/hr
150 : 150,000 / 170,000 btu/hr
Brand
M : McQuay
Product Type
DB : Ducted Blower
Product Series
B : B series Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
F : 50Hz / 3Ph / 380-415V
Model
W : Chilled Water Fan Coil
Type of ref. connection
X : Not applicable
RoHS Compliance
Product Specification Variation

9
Application Information
Application Information
Model: MWM Series
Operating Limits:
Thermal carrier : Water
Water temperature : 4°C ~ 10°C (Cooling), 35°C ~ 50°C (Heating)
Maximum water pressure : 16 bar
Air temperature : (as below)
Cooling Mode
Temperature Ts °C/°F Th °C/°F
Minimum indoor
temperature 19.0 / 66.2 14.0 / 57.2
Maximum indoor
temperature 32.0 / 89.6 23.0 / 73.4
Heating Mode
Temperature Ts °C/°F Th °C/°F
Minimum indoor
temperature 15.0 / 59.0 -
Maximum indoor
temperature 27.0 / 80.6 -
Ts: Dry bulb temperature. Th: Wet bulb temperature.
Model: MCK Series
Operating Limits:
Thermal carrier : Water
Water temperature : 4°C ~ 10°C (Cooling), 35°C ~ 50°C (2 Pipes), 35°C ~ 70°C (4 Pipes)
Maximum water pressure : 16 bar
Air temperature : (as below)
Cooling Mode
Temperature Ts °C/°F Th °C/°F
Minimum indoor
temperature 16.0 / 60.8 11.0 / 51.8
Maximum indoor
temperature 32.0 / 89.6 23.0 / 73.4
Heating Mode
Temperature Ts °C/°F Th °C/°F
Minimum indoor
temperature 16.0 / 60.8 -
Maximum indoor
temperature 30.0 / 86.0 -
Ts: Dry bulb temperature. Th: Wet bulb temperature.
Model: MCC Series
Operating Limits:
Thermal carrier : Water
Water temperature : 5 ~ 50°C
Maximum water pressure : 16 bar
Air temperature : (as below)
Cooling Mode
Temperature Ts °C/°F Th °C/°F
Minimum indoor
temperature 19.0 / 66.2 14.0 / 57.2
Maximum indoor
temperature 32.0 / 89.6 23.0 / 73.4
Heating Mode
Temperature Ts °C/°F Th °C/°F
Minimum indoor
temperature 15.0 / 59.0 -
Maximum indoor
temperature 27.0 / 80.6 -
Ts: Dry bulb temperature. Th: Wet bulb temperature.
Model: MDB Series
Operating Limits:
Thermal carrier : Water
Water temperature : 4°C ~ 10°C (Cooling), 35°C ~ 70°C (Heating)
Maximum water pressure : 16 bar
Air temperature : (as below)
Cooling Mode
Temperature Ts °C/°F Th °C/°F
Minimum indoor
temperature 19.0 / 66.2 14.0 / 57.2
Maximum indoor
temperature 32.0 / 89.6 23.0 / 73.4
Heating Mode
Temperature Ts °C/°F Th °C/°F
Minimum indoor
temperature 15.0 / 59.0 -
Maximum indoor
temperature 27.0 / 80.6 -
Ts: Dry bulb temperature. Th: Wet bulb temperature.

10
Application Information
Installation Guide
System Configuration
The standard controller board (W2/W3) comes with a VALVE jumper and a HEAT jumper. The system can be
configured as the jumper selection listed below:
HEAT Jumper VALVE Jumper
Heatpump Mode & Valve Application √√
Heatpump Mode & Valveless Application √X
Cooling Mode & Valve Application X√
Cooling Mode & Valveless Application XX
√Jumper Remained X Jumper Removed
Caution
Disconnect the power supply to the unit before attempting to connect the wiring
Valve, Heat and Fan Priority Setting
Model: MWM-LW Series
HEAT
VALVE
BLACK
N
CN_FAN
CN_PGRM CN_WIR CN_DSP
VALVE HEAT
VALVE
CN_STP
CN_ID COIL
CN_FAN FB
L
BLACK (LIVE)
RED (FAN CAP)
WHITE (NEUTRAL)
Valve Jumper
Heat Jumper
WHITE
BROWN
BLACK
BLUE BLUE
RED
G/Y
NOTATION
FM : FAN MOTOR
AS : AIR SWING MOTOR
TH1 : INDOOR COIL THERMISTOR
TH2 : ROOM THERMISTOR
-WITH JUMPER FOR HEAT PUMP
-WITHOUT JUMPER FOR COOLING ONLY
-WITH JUMPER FOR VALVE APPLICATION
FIELD WIRING
-WITHOUT JUMPER FOR VALVELESS APPLICATION
2/3 WAY VALVE
LPOWER
SUPPLY
TH2
TH1
DISPLAY BOARD
WIRED
CONTROLLER
(OPTIONAL)
N
E
VALVE N1 N L
AS
FM

11
Application Information
Model: MCK/MCC Series
HTR
L
Heat Jumper Fan Priority Jumper
N2
LIVE
N1
HI
MED
LOW
CN_TW
CN_PGRM
CN_WIR
ROOM CN_STP C_SENH_SEN
HEAT
VA LV E
CN_DSP
SHED
M4
M3
M2
M1
TFULL A_FRZ W_OPEN UNOCP
SLIENT
CVLV
HVLV
WTP
AS
CN_DRY
Valve Jumper
CO_DRAFT
Jumper With Jumper (Default) Without Jumper
Fan Priority Jumper User set speed or lower fan if auto
mode is selected Fan Stop when thermostat cat off
Heat Jumper For Heat pump For Cooling only
Valve Jumper For valve control For valveless control
MCK-AW/EW 4 pipes system controller board setting
A) Model selection
Model 1
Model 2
Model 3
Model 4
HTR
L
N2
LIVE
N1
HI
MED
LOW
CN_TW
CN_PGRM
CN_WIR
ROOM CN_STP C_SENH_SEN
HEAT
VA LV E
CN_DSP
SHED
M4
M3
M2
M1
TFULL A_FRZ W_OPEN UNOCP
SLIENT
CVLV
HVLV
WTP
AS
CN_DRY
CO_DRAFT
The standard controller board (W2.0/W3.0) comes with a default setting for model selec-
tion. Please select the model accordingly by using jumper.

12
Application Information
System Model Function
2 Pipe
System
4 Pipe
System
M1 -
Model 1
M2 -
Model 2
M3 -
Model 3
M4 -
Model 4
Cooling or Heating
Cooling or Heating with Auxiliary Heater
Cooling Only with Boiler
Cooling or Heating with Boiler
FCU
FCU
FCU
FCU
FCU
FCU
FCU
FCU
Mini Chiller (Cooling Only)
Mini Chiller (Cooling Only)
Boiler
Boiler
Mini Chiller (Cooling / Heating)
Mini Chiller (Cooling / Heating)
C) Others
The controller board comes with other option.
L
COMP
TRANSFORMER
UNOCP A_FRZ W_OPEN TFULL SHED
Unoccupied Mode
Anti Freeze Mode
Window Open Mode
Connect to Level Switch
Load Shedding Mode
i) Unoccupied Mode
If the dry contact is closed, the Unoccupied mode is activated and vice versa. When Timer On is active,
system goes back to Occupied mode.
The dry contact connection points can be connected parallel with other fan coil unit (FCU) boards. If the
dry contact is closed, Unoccupied mode will be activated on all fan coil units that are connected parallel as
shown in figure below.

13
Application Information
ii) Anti Freeze Mode
Anti Freeze operation has the highest priority among all unit operation. Anti Freeze operation will be
activated only if dry contact is closed and vice versa.
iii) Window Open Mode
The dry contact connection points can be connected in parallel with other fan coil unit (FCU) boards. If the
dry contact is closed, Window open mode will be activated on all the fan coil units which are connected in
parallel as shown in figure below.
iv) Load Shedding
The dry contact connection points can be connected in parallel with other fan coil unit (FCU) boards. If the
dry contact is closed, Load shedding mode will be activated on all the fan coil units which are connected in
parallel as shown in figure below.
Global Unoccupied, Global Window Open and Global Load Shedding operation could also be activated via the
network communication bus line by master controller with or without the above connection.
NOTE :
i) Auto Fan Mode is only applicable in Model 3 only. (Cooling only with Boiler)
ii) Fan mode is not available in valveless control.
iii) Wired handset has an indoor room sensor. Avoid locating the wired handset at isolated places where room
temperature reading will be inaccurate.

14
Application Information
Cable Size
Model Unit MWM07/10/15/20/25LW MWM301W MCK020/025/030/
040/050AW
Power supply cable size* mm² 1.5 2.5 1.5
Number of wire 3 3 3
Recommended fuse* A 2 20 2
Model Unit MCK020/025/030/
040/050AWH
MCM020/025/
030/040/050DW MCM015/020EW
Power supply cable size* mm² 1.5 1.5 2.5
Number of wire 3 3 3
Recommended fuse* A 2 2 2
Model Unit MCM025EW MCK10/15/20CW MCK20/25/30/40/50EW
Power supply cable size* mm² 4.0 1.5 1.5
Number of wire 3 3 3
Recommended fuse* A 2 2 2
Model Unit MCC10/15/20/25/28CW MCC30/38/40CW MCC50/60CW
Power supply cable size* mm² 1.5 1.5 1.5
Number of wire 3 3 3
Recommended fuse* A 5 10 16
Model Unit MDB75/100BW MDB125/150BW
Power supply cable size* mm² 1.5 1.5
Number of wire 3 4
Recommended fuse* A 5 5
Important: * These values are for information only. They should be checked and selected to comply local
or national codes and regulations. They are also subjected to the type of installation and size of
conductors.

15
Sound Data
Sound Data
Sound Pressure Level
Model Speed 1/1 Octave A-Weighted Sound Pressure (dBA), ref 20μPa Overall
(dBA)
Noise
Criteria
125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz
MWM07LW
High 31 32 33 28 26 14 6 34 28
Med 25 29 28 24 19 9 5 29 22
Low 20 26 24 20 11 8 6 25 18
MWM10LW
High 30 33 33 32 28 17 8 35 31
Med 26 29 30 27 21 11 7 30 25
Low 19 25 25 21 14 6 6 25 19
MWM15LW
High 41 39 39 38 36 26 14 42 38
Med 38 36 37 34 32 22 10 39 33
Low 30 30 31 28 23 12 7 32 26
MWM20LW
High 37 38 38 39 33 22 11 42 38
Med 33 35 35 35 29 17 8 38 34
Low 29 33 32 31 23 12 7 34 30
MWM25LW
High 42 42 42 42 40 31 21 46 42
Med 37 38 39 38 34 24 13 42 37
Low 34 35 36 35 30 20 9 39 34
*MWM301W
High 42 46 45 44 41 35 28 49 43
Med 40 45 44 43 38 33 27 47 42
Low 37 43 43 40 35 30 26 45 39
Microphone position: 1m in front and 0.8m/*1m below the vertical centre line of the unit.
Model Speed 1/1 Octave A-Weighted Sound Pressure (dBA), ref 20μPa Overall
(dBA)
Noise
Criteria
125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz
MCK020AW/
AWH
High 46 45 40 38 32 21 14 42 37
Med 44 43 37 33 28 18 12 39 32
Low 43 42 35 31 26 17 11 37 31
MCK025AW/
AWH
High 48 46 43 39 33 27 19 45 38
Med 45 43 40 35 29 21 15 42 35
Low 43 42 38 32 27 19 14 40 33
*MCK030AW/
AWH
High 50 48 47 43 37 35 28 49 42
Med 48 45 43 38 32 31 27 45 38
Low 46 43 41 35 30 30 26 43 36
*MCK040AW/
AWH
High 50 49 49 46 39 38 31 51 45
Med 48 47 47 43 36 34 25 48 42
Low 46 45 46 41 34 30 23 46 41
*MCK050AW/
AWH
High 54 52 51 48 43 42 34 53 47
Med 52 50 50 46 41 40 32 52 46
Low 51 49 49 45 39 39 31 50 45
Microphone position: 1.4m/*1.5m below the face center of the air return of the unit.

16
Sound Data
Model Speed 1/1 Octave A-Weighted Sound Pressure (dBA), ref 20μPa Overall
(dBA)
Noise
Criteria
125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz
MCK010CW
High 44 45 40 36 26 19 10 42 35
Med
40 38 34 28 19 9 7 35 29
Low 37 32 27 20 14 7 7 29 21
MCK015CW
High 48 48 44 39 31 27 15 45 39
Med
42 42 36 30 22 13 7 38 31
Low 39 36 28 20 15 6 6 30 23
MCK020CW
High 52 51 46 41 34 31 19 48 41
Med
44 43 39 33 26 18 8 40 33
Low 41 39 35 28 22 11 7 36 30
Microphone position: 1.4m below the face center of the air return of the unit.
Model Speed 1/1 Octave A-Weighted Sound Pressure (dBA), ref 20μPa Overall
(dBA)
Noise
Criteria
125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz
MCK020EW
High 44 43 42 35 29 23 15 42 37
Med
40 40 38 30 23 16 14 38 33
Low 35 34 32 23 15 10 14 32 26
MCK025EW
High 48 47 45 39 34 28 17 46 40
Med
44 42 42 34 28 21 10 42 37
Low 39 37 36 26 19 10 6 35 31
*MCK030EW
High 49 48 46 42 37 35 22 48 41
Med
44 44 42 36 32 27 14 43 37
Low 41 39 37 31 26 17 8 38 32
*MCK040EW
High 51 49 49 45 37 36 24 50 45
Med
48 46 47 40 33 31 18 47 43
Low 44 42 43 35 28 23 10 43 38
*MCK050EW
High 53 54 50 47 39 38 28 52 46
Med
49 48 47 43 36 35 25 49 43
Low 46 45 44 39 32 30 22 45 39
Microphone position: 1.4m/*1.5m below the face center of the air return of the unit.
Model Speed 1/1 Octave A-Weighted Sound Pressure (dBA), ref 20μPa Overall
(dBA)
Noise
Criteria
125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz
MCM020DW
High 45 46 47 46 41 38 29 50 45
Med
42 43 45 42 38 34 24 47 41
Low 36 37 39 35 31 24 15 40 34
MCM025DW
High 48 51 51 50 45 41 33 54 49
Med
47 50 50 49 44 40 32 53 48
Low 45 47 48 47 41 36 27 50 46
*MCM030DW
High 45 48 48 47 43 33 24 51 46
Med
44 47 47 46 42 32 23 50 45
Low 43 45 45 44 39 29 20 48 43
*MCM040DW
High 51 53 51 50 47 37 30 54 49
Med
48 51 50 49 46 36 28 53 48
Low 46 50 49 48 44 35 27 52 47
*MCM050DW
High 51 53 51 50 47 37 30 54 49
Med
48 51 50 49 46 36 28 53 48
Low 46 50 49 48 44 35 27 52 47
Microphone position: 1m in front of the unit and 0.8m/*1m below the air discharge opening.

17
Sound Data
Model Speed 1/1 Octave A-Weighted Sound Pressure (dBA), ref 20μPa Overall
(dBA)
Noise
Criteria
125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz
MCM15EW
High 42 46 49 44 43 36 31 50 45
Med 36 40 43 37 36 27 20 43 38
Low 34 38 41 34 33 23 15 41 36
MCM20EW
High 45 47 51 48 47 40 34 53 48
Med 43 46 49 46 44 37 31 51 45
Low 42 46 47 44 42 35 27 49 43
MCM25EW
High 47 50 53 50 50 43 39 56 51
Med 44 46 49 46 45 38 33 51 46
Low 38 40 43 38 37 28 22 44 38
Microphone position: 1m in front of the unit and 1m below the air discharge opening.
Model Speed 1/1 Octave A-Weighted Sound Pressure (dBA), ref 20μPa Overall
(dBA)
Noise
Criteria
125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz
MCC010CW
High 43 35 35 30 26 18 13 36 30
Med 43 34 34 28 25 17 12 35 29
Low 42 31 31 27 22 14 9 33 25
MCC015CW
High 46 40 40 33 29 21 17 40 35
Med 45 38 38 31 27 18 14 38 33
Low 40 33 33 26 21 11 9 33 28
MCC020CW
High 47 41 43 35 31 24 19 42 38
Med 47 41 41 34 31 23 18 41 36
Low 47 39 39 33 29 21 16 40 34
MCC025CW
High 48 41 40 35 31 24 19 41 35
Med 47 39 39 34 29 22 17 40 34
Low 44 35 35 30 25 17 12 36 30
MCC028CW
High 45 42 39 35 31 26 22 41 34
Med 42 38 37 32 28 22 17 38 32
Low 36 33 33 27 23 16 11 34 27
MCC030CW
High 50 45 43 42 37 31 26 46 41
Med
45 40 40 38 32 26 20 42 37
Low 42 36 37 33 28 22 15 38 32
MCC038CW
High 54 51 48 46 41 36 31 51 45
Med 51 48 46 45 37 32 26 48 44
Low 47 45 44 41 34 28 22 45 40
MCC040CW
High 54 47 47 45 39 35 29 49 44
Med 49 42 43 41 35 31 24 45 40
Low 45 39 41 37 30 26 18 41 36
MCC050CW
High 54 49 49 48 43 37 32 52 47
Med 53 47 46 47 40 35 29 50 46
Low 51 45 44 44 36 32 26 47 43
MCC060CW
High 55 49 49 50 44 37 33 53 49
Med 53 46 47 47 39 34 28 50 46
Low 51 43 44 43 35 30 24 47 42
Microphone position: 1.5m below the centre of the unit.
(Tested with 2m length duct at the air discharge outlet and air return inlet)