Samsung AM CNB C AA Series Technical Data Book page 72

13. Installation
AC 208 ~ 230 V or AC 24V thermostat
▶ Connect the indoor thermostat to B19~B26 of the PBA terminal block.
▶ Connect a thermostat to the designated terminal as stated in the rated table.
▶ Only 1 type of thermostat can be connected. (B19~B22 or B23~B26)
▶ Product will not operate when signal for cooling and heating mode is inputted at the same time.
L
N
• Maximum allowable current of each terminal is below 10mA
CAUTION
Specification table
Part
Terminal block (AC 208 ~ 230 V)
Terminal block (AC 24V)
Connection type
Input (B19~B22)
Input (B23~B26)
Condition for operation
AC 208 ~ 230 V Thermostat
power L (for heating mode) B22: Input power N
Input power N (for cooling mode) B25: Output
power L (for heating mode) B26: Input power N
When B20 or B24 is detected -> cooing mode
When B22 or B26 is detected -> heating mode
V2
V1
AC 24 V Thermostat
Specification
B19: Output power L (for cooling mode) B20:
Input power N (for cooling mode) B21: Output
(for heating mode)
B23: Output power L (for cooling mode) B24:
(for heating mode)
Connect to indoor power controller
AC 208 ~ 230 V (Maximum 10 mA)
AC 24 V (Maximum 10 mA)