McQuay MDS030A Manual page 30

Model: MDS280/300BR (Master Unit)
380V/3N~/50Hz
R T
KM1 KM2 KM3
OL1 OL2
18 19
T2 T2 T2
T1 T1
M
~
Shaft
heater heater
Constant-speed Constant-speed Digital compressor
compressor 1 compressor 2
Description of the components and parts:
Reversion
DB3A FU Fuse
4WV
KM Contactor
HP
LPT Overload protection
HPT Transformer
FU
71
T
KM4 KM5
OL4 OL5
21 23 24 26
M
~
heater
Fan motor
LOW-I HI-1 TH7 TH5 TH3
TR
V1+
black
V1-
V2+
white
V2-
12
OL2
FIX2-OL
MDS-P
OL1 13
14
OL3
DIG-OL
17
L1 HP 15 OL4 OL5
HP
L
J18
J1
1
2
KM4
3
PMW
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, see the instructions.
page 29
LPT
1 2 3
LOW-U HI-U
MDS-M
30
Connecting the slave unit a
31
S1 S2 S3
EXV1 EXV4
4 8 10 11
KM5 EXV1
5
KM5