Communication; Master / Slave - Lennox CLIMATIC 60 User Manual

COMMUNICATION

MASTER / SLAVE

Function
The CLIMATIC™ 60 offers possibilities to connect up to 8 units to allow relationship between each unit in order to perform the system.
Unit n°1
BM60..B. Rx-/Tx-
BM60..B. Rx+/Tx+
The pLAN bus is connected to CLIMATIC™ 60 on the J8 connector of board BM60. A star connection is not recommended. For an
optimum operation it is advised to connect a maximum of two cables per unit.
The cable length should not exceed 500 m and you must use a 2 pairs with general shield like LiYCY-P (0.34 mm²).
Description
There are 2 different modes to manage the units ("Cascade" & "Backup")
The cascade mode:
The cascade mode is used to engage additional cooling / heating capacity in order to reach the water set point. This master/slave
operating includes 2 modes:
• Twin mode: the units work simultaneously in order to equalize the number of compressors stages to perform the capacity of the unit.
The control manages only the capacity increase. The stage(s) decrease is controlled individually by each unit. The power factor
capacity power is also controlled individually on each unit according to its demand.
Unit n°1
17%
CL60-AC CHILLER-IOM-1011-E
Unit n°2
Max: 500 m
Unit n°2
17%
Unit n°7
BM60..B. Rx-/Tx-
BM60..B. Rx+/Tx+
Unit n°7 Unit n°8
17%
Unit n°8
17%
• 35 •