US FLOOR / FLOOR
Minichiller inverter Duo
29
8 SYSTEM STRUCTURE
The system consists in two units:
1) One outdoor unit: US 06-09-12-16 E versions
2) One indoor unit in WALL - FLOOR - FLOOR-S models:
Each unit is equipped with electronic control:
a)
CB
= (Master) integrated controller on the front panel in the indoor unit;
b)
SL1
= (Slave 1) integrated controller in the outdoor unit.
FLOOR-S models are provided with an addi
ti
onal controller in the indoor unit:
c)
SL2
= (Slave 2), integrated controller situated inside the switchboard in the indoor unit.
SL1
SL2
CB
Collegamento Unità Interna (CB) - Unità esterna (SL1) a cura dell'installatore / Connections Indoor Unit (CB) - External Unit (SL1) by the installer
EXTERNAL
UNIT
INTERNAL
UNIT
Collegamento Unità Interna (CB) - GI2 (SL2) / Connections Indoor Unit (CB) - GI2 (SL2)
The picture shows a sample connection of the control system between outdoor unit (US 09 model) and indoor unit (WALL model) Fo
r any versions of indoor and
outdoor units, the connection is the same.
CB controller in the indoor unit manages the ModBUS co
mmunicati
on in the whole system and it is called MASTER because it
establishes which kind of opera
tion
shall be carried out in a precise moment, while SL1 unit and SL2 unit, if present, are considered
as SLAVE because they are managed by the MASTER one.
N.B. This manual describes logics and functions of the CB controller in the indoor unit