System Configurations; Schematic Diagrams Of Individual And Multiple Systems - Mitsubishi Electric CAHV-R450YA-HPB Installation & Operation Manual

4. System Configurations

[1] Schematic Diagrams of Individual and Multiple Systems

(1) Individual system
* Each unit is operated individually by connecting a dry contact switch/relay to each unit.
Field-supplied dry
contact switch/relay
or remote controller
Refer to the sections "Switch Types and the Factory Settings" on the next page and
"System configuration procedures: Individual system" (page 22) for further details.
(2) Multiple system (2-16 units)
* A group of unit that consists of one main unit and up to 15 sub units is operated collectively by connecting an external water temperature sensor and a dry
contact switch/relay to the main unit.
External
temperature
sensor
Field-supplied dry
contact switch/relay
or remote controller
Refer to the sections "Switch Types and the Factory Settings" on the next page
and "System configuration procedures: Multiple system" (page 23) for further details.
PCB
Sub box
PCB Sub box
MAIN unit
Inter-unit wiring
(M-NET line)
External
PCB
temperature
sensor
Field-supplied dry
contact switch/relay
or remote controller
PCB
SUB unit
Inter-unit wiring
(M-NET line)
17
External
Sub box
temperature
sensor
PCB
SUB unit(s)
"n"th unit