Installation guide
-43-
Design & installation Guide For McQuay MDS Multi System
Model MDS080/100/120B
Model MDS080/100/120BR
HI-U
3
21
LPT
LOW-U
AinApc
Bpc
Bin
S2 S3S1
MDS-M
MDS-P
~
M
~
M
M
~
TR
FU
DB3A
PMW
OL
HP
LPT
KM
EXV4
Description of components and parts :
Symbol Description Symbol Description
Phase-loss/reverse protector
Fuse
Contactor
High-pressure switch
Low -pressure sensor
Transformer
Overload protector
Solenoid valve
Over cooling electronic expansion valve 4
S3.4
OFF
OFF
S3.3
OL3 OL4
S3.1
OFF
S2.2
OFF ON
S2.3 S3.2
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
OL1
14.0A
S1.1
OFF
14.0A
OFF
OFF
S1.2
OL2
14.0A
14.0A
14.0A
Overload protection settings :
DIP switch settings :
Model
Model
RED
BLACK
WHITE
Connecting the indoor unit
Connecting central control system
30
31
32
33
MDS080B
MDS100B
MDS120B
MDS120B
MDS100B
MDS080B
17
DB3A
5
FIX3-OL
DIG
FIX1
FIX2
TH7 TH5
KM3
KM4
TH1TH2
EXV4
EXV1
EXV4
L
T71
FU
TH8TH10 TH9TH11TH12TH6HI-1 TH3
V1+
TR
V2-
V2+
V1-
DIG-OL
12
13
OL1
OL2
FIX2-OL
FIX1-OL
LOW-I
4WV
FANL
FANH
24
SV2
PMW
11
10
1
SV1
KM4 KM3
KM1
PMW
KM2
3
HP
N
L
OL4
J1
16
15
OL3
HP
J18
LP
R
N
24 25 26
KM3
OL3
2321 22
OL4
KM4
T3
T1
T2
L1
S
81
TH4
1.8A3.3A
0.67A
1.9A
0.67A
11.6A 1.9A
N
TS
380V/3N~/50Hz
R
KM1
OL1
T3
T2
T1
OL2
KM2
Constant-speed compressor Fan motorDigital compressor
YELLOW
BLUE
RED
BLUE
YELLOW
RED
BLUE
YELLOW
RED
BLUE
YELLOW
RED
BLACK
WHITE
Air suction temperature sensor TH12
Over cooling circuit outlet temperature sensorTH11
After over cooling circuit temperature sensor TH10
Before over cooling circuit temperature sensor TH9
Coil inlet temperature sensor TH2
Air discharge temperature
sensor of the digital compressor TH1
Ambient temperature sensor TH8
Notes:
1:
-----------
Field wiring
2:
--------------
Factory wiring
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.
BLACK
WHITE
BROWN
3
21
LPT
LOW-U
AinApcBpc Bin
S2 S3S1
MDS-M
MDS-P
~
M
~
M
M
~
Model
Model
Connecting the indoor unit
Connecting central control system
30
31
32
33
OFF ON
OFF
MDS080BR
MDS100BR
MDS120BR
OFFONOFF ON OFF OFFOFFOFF
OFFON OFFOFFOFF OFF
MDS120BR
MDS100BR
MDS080BR
1.8A
3.3A14.0A 14.0A
14.0A 14.0A
0.67A
1.9A
17
TR
DB3A
5
FIX3-OL
DIG
FIX1
FIX2
TH7 TH5
7
4WV
KM3
KM4
HI-U
TH1
TH2
EXV4EXV1
EXV4
EXV1
L
T
71
FU
TH8TH10
TH9TH11
TH12
TH6
HI-1
TH3
V1+
TR
V2-
V2+
V1-
DIG-OL
12
13
OL1
OL2
FIX2-OL
FIX1-OL
LOW-I
4WV
FANL
FANH
24
SV2
PMW
11
10
1
SV1
KM4
KM3
KM1
PMW
KM2
3
HP
N
L
OL4
J1
16
15
OL3
HP
J18
LP
R
N
24 25 26
KM3
OL3
2321 22
19
OL4
KM4
T3
T1
T2
L1
S
81
TH4
S3.4
OFF
S3.2
OFF
0.67A
S2.3
ON OFF
S3.1 S3.3
OL3
14.0A
OL1
11.6A
S1.1
OFF
OL2
S1.2
OFF
OL4
1.9A
OFF
S2.2
N
TS
380V/3N~/50Hz
R
18
KM1
OL1
T3
T2
FU
EXV14WV
DB3A
T1
PMW
OL
HP
LPT
KM EXV4
OL2
KM2
Shaft heater
Shaft heater
Constant-speed compressor Digital compressor Fan motor
Symbol
Description
Symbol
Description
Phase-loss/reverse protector
System electronic expansion valve 1
Fuse
Four-way valve
Contactor
High-pressure switch
Low -pressure sensor
Transformer
Overload protector
Solenoid valve
Over cooling electronic expansion valve 4
Overload protection settings :
DIP switch settings :
Air suction temperature sensor TH12
Over cooling circuit outlet temperature sensorTH11
After over cooling circuit temperature sensor TH10
Before over cooling circuit temperature sensor TH9
Ambient temperature sensor TH8
Coil inlet temperature sensor TH2
Coil inlet temperature sensor TH1
Air discharge temperature sensor of the digital compressor TH1
BLACK
WHITE
YELLOW
BLUE
RED
BLUE
YELLOW
RED
BLUE
YELLOW
RED
BLUE
YELLOW
RED
BLACK
WHITE
BROWN
Notes:
1:
-----------
Field wiring
2:
--------------
Factory wiring
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.
RED
BLACK
WHITE