Multisplit Installation Manual Model Reference: A5CM2020ER
Contents
1. International Multisplit Installation Manual Model Reference ASCM2020ER Internationa Model Reference ASCM2020ER Equipment 2 off ASCM20ER matched with 1 off ASLC40CR Configuration Master Slave Twinsplit a c Mains Power Separate Power supplies are required to indoor and outdoor units Power to each indoor unit should be 240v 1ph with a Samp motor rated fuse supply Power to outdoor unit should be 420v 3ph with a 25amp per phase fuse supply Interconnecting and Control Cables From Outdoor Unit to Indoor Master Unit 3 Core Master Unit to Slave Unit control using 2 off Nim Boards and One off Netware Controller Slave Unit Outdoor Fan Sensor connection on PCB fitted with resistor Wiring Configuration See Figure 1 1 on the following pages Connecting the Nim Controller and Boards MASTER UNIT 1 Plug the cable supplied with the Nim board into CNI on the Nim and connect it to CN4 on the master unit indoor pcb 2 Plug the Netware controller cable into CN2 on the Master Unit Nim board and match the coloured wires to the corresponding coloured connections on the inside back of the Netware controller Address the Master unit using the dip switches as follows 3 Dip Switch marked DSWI eight switches LEAVE ALL SWITCHES DOWN OFF 4 Dip Switch Marked DSW2 four switches LEAVE ALL SWITCHES DOWN OFF This unit is now addressed as the master unit SLAVE UNIT 5 Plug the ca2. ble supplied with the Nim board into CN1 on the Nim and connect it to CN4 on the slave unit indoor pcb Address the Slave unit as follows 6 Dip Switch marked DSWI eight switches LEAVE ALL SWITCHES DOWN OFF 7 Dip Switch marked DSW2 four switches LEAVE SWITCH 1 2 3 SET DOWN OFF MOVE SWITCH 4 UP ON This unit is now addressed as the slave unit number 1 Connect the Nim Boards together as follows 8 Connect a two core cable of about 75mm to CN3 on the Master unit Nim board connector is on top right of board and note which cable plugs in to A and which in to B as the connection has polarity 9 Run the cable to the Slave unit Nim board and connect it in the same way MAKE SURE THAT THE CABLES ARE IN THE SAME CONNECTIONS AS IN THE MASTER UNIT NIM BOARD The Nim Boards connection is now complete Once power is applied the Master unit will be controlled by the Netware controller and the Slave unit will copy the function of the Master unit international Figure 1 1 Wiring Configuration for ASCM2020ER Condensing Unit Indoor Master Unit Indoor Slave Unit xorusen 7 1 Nim PCB and Netware setup are as per normal Master Slave wiring configuration 2 OD Coil Sensor on SLAVE UNIT is linked out with the resistor 4 7Kohm supplied Internationa Figure 1 2 Outdoor Unit High Pressure Switch Modification for ASCM2020ER FOR UNITS WITHOUT PHASE PROTECTION BOARD A modifica
3. l A and re connect Vidi Ik i Z I ee ee u n directly to point A2 on the al Es sef a _ contactor 2 a a z fouttana A Fali i FAN uOTOR P i K j ina COMP ee LI I Figure 1 4 Pipework Configuration for ASCM2020ER e Pipe sizes for the ASCM20ER are 1 4 Liquid amp 1 2 Gas e Pipe Sizes for the ASLC40CR are 3 8 Liquid amp 5 8 Gas 5 8 Gas 3 8 Liquid T International 1 2 Gas ASCM20ER Cassette Master Unit 1 4 Liquid ASCM20ER Cassette Slave Unit 1 2 Gas NOTES l A reducing Tee is necessary where pipework is split between each cassette on BOTH Liquid and Gas Lines The distance from the tee to each indoor unit MUST be more or less equal to prevent liquid flooding one of the cassettes and starving the other
4. tion is required to ensure that the high pressure switch remains operational when using the ASLC40CR in a multisplit application Carry out the modification on site as follows 1 Remove Blue Wire from contactor at point A2 and T Mains Neutral Terminal and discard i 4 z E T C CI mi Mim on WHITE E E i sE al iy I y T mi BLACK BLACK WHITE SSA i H SO OS Bey ho i i l H 22100 i C I Mi I i a E n f x pra CE i ar WHITE 2 Remove Black High Pressure Switch Wire from lala Se u n Terminal A and re connect FT a a Ge m i n i a 3 a 5 2 directly to point A2 on the F i i OUTDOOR i contactor AT BLACK ui come wi mt I PART NO 08 OZ 4 035247 Internationa Figure 1 3 Outdoor Unit High Pressure Switch Modification for ASCM2020ER FOR UNITS FITTED WITH PHASE PROTECTION BOARD A modification is required to ensure that the high pressure switch remains operational when using the ASLC40CR in a multisplit application Carry out the modification on site as follows 2 r z i Si p ia 21 mi BLU 1 Remove Blue Wire from j 7 p an contactor at point A2 and TEL Mains Neutral Terminal e de and discard Ki wyatt i pui lesene grav 2 Remove Black High MG Mr een 4 Pressure Switch Wire from a wary per Mi F Termina
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