McQuay MDS Multi System

Design & installation Guide For McQuay MDS Multi SystemModel MDS260/280/300BR(Slave Unit)R S TREDYELLOWBLUEN380V/3N~/50HzFUT 71S DB3A 81R NLAir suction temperature sensor TH12Over cooling circuit outlet temperature sensorTH11After over cooling circuit temperature sensor TH10Before over cooling circuit temperature sensor TH9Ambient temperature sensor TH8Coil inlet temperature sensor TH2LPT HPT1 2 3 1 2 3REDWHITEBLACKREDWHITEBLACKKM1KM2KM3KM4KM5TRBLACKWHITELOW-IV1+V1-V2+V2-HI-1 TH7 TH6 TH5 TH3 TH12 TH11 TH10TH9 TH8 TH4 TH2 TH1 LOW-UMDS-MHI-UOL1REDYELLOWT1BLUET2M~T318OL2REDYELLOWBLUE19OL3REDYELLOWBLUE20OL421 22RED2324 25 26L1T2T1 T2 T3T1 T3MMM~~~Shaft heater Shaft heater Shaft heaterBLUEYELLOWOL5BROWNWHITEBLACKOL2 12OL1 13OL3 14HP 15 OL4 16 OL5 17FIX3-OLFIX2-OLFIX1-OLDIG-OLLPHPNLJ1 J18PMWMDS-PS1 S2Bpc Apc Bin Ain3233S3SV2SV1FANLFANH4WVFIX2FIX1DIG2 4 7 8 10 11Connecting the indoor unitConnecting the master unitEXV1 EXV4KM4KM5EXV1EXV4compressor 1 compressor 2 compressor 3Fan motor3 5KM5 KM4 4WV KM2 KM1 KM3Description of components and parts :Symbol Description Symbol DescriptionDB3A Phase-loss/reverse protector FU Fuse4WV Four-way valveEXV1 System electronic expansion valveKM ContactorEXV4 Over cooling electronic expansion valve 4HP High-pressure switchOL Overload protectorLPT Low -pressure sensorTR TransformerHPT High-pressure sensorOverload protection settings :OL1 OL2 OL3 OL4 OL514.0 14.0 14.0 3.3A 1.8ADIP switch settings :Model S1.1 S1.2 S2.1 S2.2 S2.3 S3.1 S3.2 S3.3 S3.4MDS260BR OFF OFF OFF OFF ON ON OFF OFF OFFMDS280BR OFF OFF OFF OFF ON ON OFF OFF ONMDS300BR OFF OFF OFF OFF ON ON OFF ON OFFMDS320BR OFF OFF OFF OFF ON ON OFF ON ONNotes:1: -----------Field wiring2: --------------Factory wiring3: S1.3~S1.8 set the number of indoor units. S2.1 sets theunit as a master/slave. For details of S2.4~S2.8.-48-