4.7.7.1 4-pipe application with one valve: 6-port ball valve or 6-
port PICV (RDG26..)
RDG26.. can control a 6-port ball valve or 6-port PICV for fan coil applications.
● 4-pipe with 6-port ball valve (DIP4 = ON)
● 4-pipe with 6-port PICV (DIP2&4 = ON)
See Applications for universal systems [➙ 45].
Only one DC signal (Y10 output) controls the 6-port valve / 6-port PICV.
Hydraulic and control diagram of the 6-port PICV
W Room temperature setpoint
YH Control command "Valve" (heating)
YC Control command "Valve" (cooling)
Y10 DC 0…10 V signal
T[℃] Room temperature
P260 Flow limitation function for heating only
P261 Flow limitation function for cooling only
Default integral action time TN is set to 45 minutes.
Output voltage range of Y10 can be configured via P201. For details, see Control
output configuration for 6-port valve (P201) [➙ 101].
Control output
configuration
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