McQuay MDS030AR Applications Manual page 43

Model MDS080/100/120B
380V/3N~/50Hz
R S T
KM2 KM3
KM1
OL1 OL2 OL3
T2 T2
T1
T1 T3 T3
M
M
~ ~
Constant-speed compressor Digital compressor
Description of components and parts :
Symbol Description Symbol
Phase-loss/reverse protector
DB3A FU Fuse
KM Contactor EXV4 Over cooling electronic expansion valve 4
HP High-pressure switch
PMW Solenoid valve
LPT Low -pressure sensor OL Overload protector
TR
Transformer
Model MDS080/100/120BR
380V/3N~/50Hz
R S T
KM1 KM2
OL1 OL2
18 19
T2 T2
T1 T3 T1 T3
M
M
~
~ Shaft heater
Shaft heater
Constant-speed compressor Digital compressor
Description Description
Symbol Symbol
DB3A Phase-loss/reverse protector FU Fuse
4WV Four-way valve EXV1 System electronic expansion valve 1
KM Contactor EXV4 Over cooling electronic expansion valve 4
HP High-pressure switch PMW Solenoid valve
LPT Low -pressure sensor OL Overload protector
TR Transformer
L
FU
T 71
S 81
DB3A
R N
KM4
OL4
21 22 23 24 25 26
M
~
Fan motor
Overload protection settings :
Model
OL1 OL2
MDS080B 11.6A 14.0A
Description
MDS100B
14.0A 14.0A
MDS120B 14.0A 14.0A
DIP switch settings :
Model S1.1 S1.2
MDS080B OFF ON
MDS100B OFF ON
MDS120B OFF ON
FU L
T 71
S 81
R N
DB3A
KM3 KM4
OL3 OL4
21 22 23 24 25 26
M
~
Fan motor
Overload protection settings :
Model OL1 OL2 OL3 OL4
MDS080BR 11.6A 14.0A 1.9A 0.67A
MDS100BR 14.0A 14.0A 1.9A 0.67A
MDS120BR 14.0A 14.0A 3.3A 1.8A
DIP switch settings :
Model S1.1 S1.2 S2.2 S2.3
MDS080BR OFF OFF OFF ON
MDS100BR OFF OFF OFF ON
MDS120BR OFF OFF OFF ON
Design & installation Guide For McQuay MDS Multi System
LOW-I HI-1 TH7 TH6 TH5 TH3
TR
V1+
BLACK
V1-
V2+
WHITE
V2-
FIX3-OL
FIX2-OL
OL1 12
FIX1-OL
MDS-P
13
OL2
DIG-OL
LP
S1
L1 HP 15 OL3 16 OL4 17
HP
N
L
J18
J1
1
2
KM3
3
PMW KM4
OL3 OL4
0.67A
1.9A
0.67A
1.9A
3.3A 1.8A
Notes:
1: -----------Field wiring
S2.2 S2.3 S3.1 S3.2 S3.3 S3.4
2: --------------
OFF ON OFF OFF OFF OFF
3: S1.3~S1.8 set the number of indoor units. S2.1 sets the
OFF ON OFF OFF OFF ON
unit as a master/slave. For details of S2.4~S2.8.
OFF ON OFF OFF ON OFF
LOW-I HI-1 TH6
TR
TH7 TH5
V1+
WHITE
V1-
V2+
BLACK
V2-
FIX3-OL
FIX2-OL
12
OL1
FIX1-OL
MDS-P
13
OL2
DIG-OL
LP
17
L1 HP 15 OL3 16 OL4
HP
N
L
J18
J1
1
KM3
PMW
Notes:
1: -----------Field wiring
Factory wiring
2: --------------
S3.1 S3.2 S3.3 S3.4
3: S1.3~S1.8 set the number of indoor units. S2.1 sets the
OFF OFF OFF OFF
unit as a master/slave. For details of S2.4~S2.8.
OFF OFF OFF ON
OFF OFF ON OFF
LPT
1 2 3
TH12 TH11 TH10 TH9 TH8 TH4 TH2 TH1
LOW-U
HI-U
MDS-M
30
31 Connecting the indoor unit
32
Connecting central control system
33
S2 S3
EXV4
EXV1
4
10 11
KM4 EXV4
5
KM3 KM1 KM2
Factory wiring
LPT
1 2 3
LOW-U
TH3 TH11 TH9 TH4 TH1 HI-U
TH12 TH10 TH8 TH2
MDS-M
30
Connecting the indoor unit
31
32
Connecting central control system
33
S1 S2 S3
EXV1 EXV4
7
2 4 10 11
EXV4
EXV1
KM4
3 5
KM4 KM3 4WV KM1 KM2
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