McQuay MDS030AR Applications Manual page 45

Model MDS180B
380V/3N~/50Hz
R S T
KM1 KM2 KM3
OL1 OL2 OL3
T2 T2 T2
T1 T3 T1 T3 T1 T3
M M
M
~ ~ ~
Constant-speed Constant-speed
Digital compressor
compressor 1 compressor 2
Description of components and parts :
Symbol Description Symbol
Phase-loss/reverse protector
DB3A FU Fuse
EXV4 Over cooling electronic expansion valve 4
4WV Four-way valve
KM Contactor PMW Solenoid valve
High-pressure switch
HP OL Overload protector
Low -pressure sensor
LPT
HPT High-pressure sensor
Transformer
TR
Model MDS180BR
380V/3N~/50Hz
R S T N
KM1 KM2 KM3
OL1 OL2 OL3
28 29 30
T2 T2
T2
T3
T1 T3 T1 T3 T1
M
M
M
~
~ ~
Shaft heater Shaft heater
Shaft heater
Constant-speed Constant-speed
Digital compressor Fan motor 1
compressor 1 compressor 2
Description of components and parts :
Symbol Description Symbol
DB3A Phase-loss/reverse protector FU Fuse
4WV Four-way valve EXV1 System electronic expansion valve 1
KM Contactor EXV2 System electronic expansion valve 2
HP High-pressure switch EXV4 Over cooling electronic expansion valve 4
LPT Low -pressure sensor PMW Solenoid valve
HPT High-pressure sensor OL Overload protector
TR Transformer
FU
T 71
S 81
R
N
DB3A
KM4 KM5 KM6 KM7
OL4 OL5 OL6 OL7
32 33 34 35 36 37 38 39 40 41 42 43
M M
~ ~
Fan motor 1 Fan motor 2
Description
Overload protection settings :
OL1 OL2 OL3 OL4
14.0 14.0 14.0 1.9A
DIP switch settings :
S1.1 S1.2 S2.2 S2.3
OFF ON OFF ON
FU
71
T
S 81
R N
DB3A
KM4 KM5 KM6 KM7
OL4 OL5 OL6 OL7
L1
32 33 34 35 36 37 38 39 40 41 42 43
M
M
~
~
Fan motor 2
Description
Overload protection settings :
OL1 OL2 OL3 OL4 OL5
14.0 14.0 14.0 1.9A 0.67A
DIP switch settings :
S1.1 S1.2 S2.2 S2.3 S3.1
OFF OFF OFF ON OFF
Design & installation Guide For McQuay MDS Multi System
L
TR
LOW-I HI-1 TH6 TH3
V1+
TH7 TH5 TH12
BLACK
V1-
V2+
WHITE
V2-
MDS-E
FIX3-OL
OL2 12
FIX2-OL
OL1
13
FIX1-OL
14
OL3
DIG-OL
LP
L1 HP OL4 16 OL5 17
15
OL6 18 OL7 19
HP
N
L
J1
20 21 22 23 1
KM5 KM4 KM7 KM6
24 25 26 27
KM4 KM5 KM6 KM7 PMW
Notes:
OL5 OL6 OL7 1: -----------Field wiring
2: --------------
0.67A 1.9A 0.67A
3: S1.3~S1.8 set the number of indoor units. S2.1 sets the
unit as a master/slave. For details of S2.4~S2.8.
S3.1 S3.2 S3.3 S3.4
OFF ON OFF OFF
L
EXV2
TR
LOW-I HI-1 TH6
V1+
TH7 TH5
BLACK
V1-
V2+
WHITE
V2-
MDS-E
FIX3-OL
12
OL2
FIX2-OL
13
OL1
FIX1-OL
14
OL3
DIG-OL
LP
16
HP 15 OL4 OL5 17
OL6 18 OL7 19
HP
N
L
J1
20 21 22 23 1
KM5 KM4 KM7 KM6
24 25 26 27
KM4 KM5 KM6 KM7 PMW
Notes:
1: -----------Field wiring
OL6 OL7
Factory wiring
2: --------------
1.9A 0.67A
3: S1.3~S1.8 set the number of indoor units. S2.1 sets the
unit as a master/slave. For details of S2.4~S2.8.
S3.2 S3.3 S3.4
ON OFF OFF
LPT HPT
1 2 3 1 2 3
TH4 TH1
TH11 TH9 LOW-U HI-U
TH10 TH8 TH2
MDS-M
45
46 Connecting the indoor unit
47
Connecting central control system
48
S1 S2 S3
MDS-P
EXV1 EXV4
2 5 7 10
4WV2 KM2 KM1 KM3 EXV4
Factory wiring
LPT HPT
1 2 1 2
3 3
TH3 TH11 TH9 TH4 TH1
LOW-U HI-U
TH12 TH10 TH8 TH2
MDS-M
45
46 Connecting the indoor unit
47
48 Connecting central control system
S1 S2 S3
MDS-P
EXV1 EXV4
2 3
5 7 10
4WV2 4WV1 KM2 KM1 KM3 EXV1 EXV4
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