McQuay MDS030A Manual page 25

Model: MDS080/100/120B
380V/3N~/50Hz
R T
KM1 KM2
OL1 OL2
T2 T2
T1 T3 T1 T3
M M
~ ~
Constant-speed Digital compressor
compressor
Description Symbol Description
Reversion
DB3A FU Fuse
Overcooling electronic
KM Contactor
expansion valve p
HP High pressure switch
Solenoid valve
OL Overload protection
LPT Low pressure sensor
TR Transformer
Model: MDS080/100/120BR
380V/3N~/50Hz
R T
KM1 KM2
OL1 OL2
18 19
T2 T2
T1 T1 T3
M
~
Shaft heater
Constant-speed Digital compressor
compressor
Descriptions of the components and parts:
Symbol Description Description
Fuse
DB3A
protector
4WV
KM Contactor
HP
Solenoid valve
LPT Low pressure sensor
OL Overload protection
TR Transformer
FU L
71
T
KM3 KM4
OL3 OL4
21 22 23 24 25 26
M
~
Fan motor
Model
OL4
MDS080B 0.67A
MDS120B 1.8A
MDS080B
MDS100B
MDS120B
FU
L
71
T
KM3 KM4
OL3 OL4
21 22 23 24 25 26
M
~
Fan motor
S3.4
ON
LOW-I HI-1 TH7 TH5
TR
V2-
FIX2-OL
12
OL1
FIX1-OL
MDS-P
13
OL2
DIG-OL
17
L1 OL4
HP
L
J18
J1
1
KM3
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.
LOW-I HI-1 TH7 TH5 TH3
TR
V2-
FIX2-OL
OL1 12
FIX1-OL
MDS-P
13
OL2
DIG-OL
L1 OL4 17
HP
L
J18
J1
1
2
KM3
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 24
LPT
1 2 3
TH3 TH12 TH11 LOW-U HI-U
MDS-M
30
Connecting the indoor unit
31
32
33 Connecting central control system n
EXV1 EXV4
2 4 10 11
KM4 EXV4
5
KM1 KM2
1 2 3
TH12 TH11 LOW-U HI-U
MDS-M
Connecting the indoor unit
S1
EXV1 EXV4
7
4 10 11
KM4
4WV KM1 KM2