System Configuration - Mitsubishi Electric CAHV-R450YA-HPB Service Manual

[ II Restrictions ]

[1] System Configuration

II Restrictions
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" (page 28) and
"System configuration procedures: Individual system" (page 31) 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" (page 28)
and "System configuration procedures: Multiple system" (page 32) for further details.
HWE22020
PCB
Sub box
(TB3)
PCB
Sub box
(TB3)
MAIN unit
Inter-unit wiring
(M-NET line)
External
PCB
temperature
(TB3)
sensor
Field-supplied dry
contact switch/relay
or remote controller
PCB
(TB3)
SUB unit
Inter-unit wiring
(M-NET line)
- 21 -
External
Sub box
temperature
sensor
PCB
(TB3)
SUB unit(s)
"n"th unit
GB