McQuay MDS030AR Applications Manual page 46

Design & installation Guide For McQuay MDS Multi System
KM1
OL1
Constant-speed
compressor 1
-46-
Model MDS200/220/240B
380V/3N~/50Hz
R S T
KM2 KM3 KM4
OL2 OL3 OL4
T2 T2 T2 T2
T1 T3 T1 T3 T1 T3
T1 T3
M M
M M
~ ~
~ ~
Constant-speed Constant-speed Digital compressor
compressor 2 compressor 3
Description of components and parts :
Symbol Description Symbol
FU
DB3A Phase-loss/reverse protector Fuse
4WV Four-way valve EXV4
Over cooling electronic expansion valve 4
KM Contactor PMW
Solenoid valve
HP High-pressure switch
OL Overload protector
LPT Low -pressure sensor
HPT High-pressure sensor
Transformer
TR
Model MDS200/220/240BR
380V/3N~/50Hz
R S T
KM1
KM3 KM4
KM2
OL2 OL3 OL4
OL1
28 29 30
T2 T2 T2 T2
T3 T1 T3 T1 T3
T1 T1 T3
M M
M M
~ ~
~ ~
Shaft Shaft Shaft
heater heater heater
Constant-speed Constant-speed Constant-speed Digital compressor
compressor 1 compressor 2 compressor 3
Description of components and parts :
Symbol Description Symbol Description
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
L
FU
T 71
S 81
R N
DB3A
KM5 KM6 KM7 KM8
OL5 OL6 OL7 OL8
L1
32 33 34 35 36 37 38 39 40 41 42 43
M M
~
~
Fan motor 1 Fan motor 2
Overload protection settings :
Model
Description OL1 OL2
MDS200B 14.0A 14.0A
MDS220B 14.0A 14.0A
MDS240B
14.0A 14.0A
DIP switch settings :
Model S1.1 S1.2
MDS200B OFF ON
MDS220B OFF ON
MDS240B OFF
ON
FU
T 71
S 81
R N
DB3A
KM5 KM6
KM7 KM8
OL5 OL6 OL7 OL8
31
32 33 34
35 36 37 38 39 40 41 42 43
M M
~ ~
Shaft
heater
Fan motor 1 Fan motor 2
Overload protection settings :
Model
OL1 OL2 OL3 OL4 OL5
MDS200BR 14.0A 14.0A 14.0A 14.0A 1.9A
MDS220BR 14.0A 14.0A 14.0A 14.0A 1.9A
MDS240BR 14.0A 14.0A 14.0A 14.0A 3.3A
DIP switch settings :
Model S1.1 S1.2 S2.2 S2.3 S3.1
MDS200BR OFF OFF OFF ON OFF
MDS220BR OFF OFF OFF ON OFF
MDS240BR OFF OFF OFF ON OFF
TR
LOW-I HI-1 TH6 TH3 TH11
V1+
TH7 TH5 TH12
BLACK
V1-
V2+
WHITE
V2-
MDS-E
OL3 11
FIX3-OL
12
OL2
FIX2-OL
OL1 13
FIX1-OL
14
OL4
DIG-OL
LP
HP OL5 16 OL6 17
15
OL7 OL8
18 19
HP
N
L
J1
1
20 21 22 23
KM5 KM7
KM6 KM8
24 25 26 27
KM5 KM6 KM7 KM8 PMW
OL3 OL4 OL5 OL6 OL7 OL8
14.0A 14.0A 1.9A 0.67A 1.9A 0.67A
14.0A 14.0A 1.9A 0.67A 1.9A 0.67A
Notes:
14.0A 14.0A 3.3A 1.8A 3.3A 1.8A
1: -----------Field wiring
2: --------------
3: S1.3~S1.8 set the number of indoor units. S2.1 sets the
S2.2 S2.3 S3.1 S3.2 S3.3 S3.4
unit as a master/slave. For details of S2.4~S2.8.
OFF ON OFF ON OFF ON
OFF ON OFF ON ON OFF
OFF ON OFF ON ON ON
L
EXV2
TR
LOW-I HI-1 TH6 TH3
V1+
TH7 TH5
BLACK
V1-
V2+
WHITE
V2-
MDS-E
OL3 11
FIX3-OL
12
OL2
FIX2-OL
OL1 13
FIX1-OL
14
OL4
DIG-OL
LP
L1 HP 15 OL5 16 OL6 17
OL7 18 OL8 19
HP
N
L
J1
20 21 22 23 1
KM6 KM5 KM8 KM7
24 25 26 27
KM5 KM6 KM7 KM8
PMW
OL6 OL7 OL8
0.67A 1.9A 0.67A
0.67A 1.9A 0.67A
Notes:
1.8A 3.3A 1.8A
1: -----------Field wiring
2: -------------- Factory wiring
3: S1.3~S1.8 set the number of indoor units. S2.1 sets the
S3.2 S3.3 S3.4
unit as a master/slave. For details of S2.4~S2.8.
ON OFF ON
ON ON OFF
ON ON ON
LPT HPT
1 2 3 1 2 3
TH9 TH4 TH1
LOW-U HI-U
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 4 5 7 10
EXV4
4WV KM3 KM2 KM1 KM4
Factory wiring
LPT HPT
3 1 2 3
1 2
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
4 5 10
7
EXV1 EXV4
4WV2 4WV1 KM3 KM2 KM1 KM4