McQuay MDS030A Manual page 29

Model: MDS260BR (Master Unit)
380V/3N~/50Hz
R S T
KM1 KM2
OL1 OL2
18 19
T2 T2
T1 T3
M
~
Shaft
heater heater
Constant-speed Digital compressor
compressor
Description of the components and parts:
Description
Fuse
4WV
KM
Contactor
HP
LPT Low pressure sensor Overload protection
HPT High pressure sensor Transformer
Model: MDS260/280/300BR (Slave Unit)
380V/3N~/50Hz
R T
KM1 KM2 KM3
OL1 OL2
18 19
T2 T2 T2
T1 T1 T1
M
~
Shaft
heater heater
Compressor 1 Compressor 2 Compressor 3
Description of the components and parts:
Description
Reversion
DB3A FU Fuse
System electronic
4WV
KM
Contactor
HP
TR
LPT Low pressure sensor Transformer
HPT
High pressure sensor
FU L
T 71
KM3 KM4
OL3
24 25 26
M
~
Fan motor
OL1 OL4
1.8A
S1.1 S2.2 S2.3 S3.2 S3.3 S3.4
OFF ON OFF OFF OFF
FU
L
71
T
KM4 KM5
OL4 OL5
21 23 24 25 26
M
~
heater
Fan motor
OL1 OL3 OL4 OL5
14.0 14.0 3.3A 1.8A
S2.1 S2.2 S2.3 S3.2 S3.3
LOW-I HI-1 TH7 TH6 TH5
TR
V1+
black
V1-
V2+
white
V2-
FIX2-OL
12
OL1
FIX1-OL
MDS-P
13
OL2
DIG-OL
LP
L1 17
HP
HP
N
L
J1
1
PMW
Notes:
1: Field wiring
2:
Factory wiring
3:
S1.3~S1.8 set the number of indoor units. For details of S2.4~S2.8, see the instructions.
LOW-I HI-1 TH7
TR
V1+
black
V1-
V2+
V2-
12
OL2
FIX2-OL
MDS-P
OL1 13
14
OL3
DIG-OL
L1 HP 15 OL4 OL5 17
HP
N
L
J18
J1
Notes:
S3.4
1: Field wiring
2:
Factory wiring
3: S1.3~S1.8 set the number of indoor units. For details of S2.4~S2.8, see the instructions.
page 28
LPT
1 2 3
TH3 TH11 TH4 TH2 LOW-U HI-U
MDS-M
30
Connecting the slave unit
31
32
Connecting central control system n
33
S1 S2 S3
EXV1 EXV4
7
2 4 10 11
EXV1
KM3
3
KM4 KM1 KM2
LPT
1 2
3
TH6 TH5 TH3 TH12 TH11 TH4 TH2
LOW-U HI-U
MDS-M
Connecting the indoor unit h
32
Connecting master unit m
33
EXV1 EXV4
7
2 4 8 10 11
KM5
KM4
3 5
KM5