Danfoss RET 230 HCW-3 Instructions D'installation page 6

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Wiring
2-pipe fan coil application
ELECTRONICS
FAN
FAN FAN
L O/P
COM
X X N
SEN SEN
1 2 3
3 SPEED
PS1 PIPE
FAN
SENSOR
230 VAC
FIXED 3A
N
Note:
If HEAT/COOL/FAN outputs are 230V, link terminals L-COM
6