External Contact Connection - Samsung KXWD Series Installation Manual

External contact connection

Flow switch connection (Mandatory connection)
When flow switch is used, it will receive signal of the heat source water circulation and detects if there is any problem on
water circulation before operating the outdoor unit.
When there is no contact signal input to the flow switch, it will be diagnosed as 'Problem with the heat source water
circulation' and outdoor unit will stop operating to protect outdoor unit.
PUMP OUT 2WAY V/V FLOW S/W
Flow control
Pump out, 2 way solenoid valve, flow switch can be used individually or together.
For installation location of the 2 way solenoid valve and flow switch, Refer to 'Water pipe diagram' on page 98.
CAUTION
Pump out connection
When the main pump is installed to common water pipe, powerless contact signal will be provided. (Refer to 'Installation
example of extra controller such as 2 way solenoid valve and pump etc' in page 104 ~ 105.)
PUMP OUT 2WAY V/V FLOW S/W
Flow control
Water Hub PBA
Connect flow switch wire to the FLOW-SW IN terminal regardless of the polarity
Water Hub PBA
Controller
Pump
Power
source
ENGLISH-101
Flow switch turns on when flow amount
increases