Siemens RDG20 KN Series - Page 73

Functions
Additional functions
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RDG204KN fan coil and universal (CLC, with no fan) applications with IAQ control:
FCU
application
CLC
app
3)
Fan
1)
H/C Control outputs
signal combination
Damper signal
2)
DC
3-speed
DC
On/Off
2-pipe
✓
✓
● On/Off (PWM)
● 3-pos
✓
✓
✓
✓
✓
✓
2-pipe+ RAD
2-pipe+ el. heat
2-pipe/2-stage
4-pipe
✓
✓
● 2 × On/Off (PWM)
● On/Off (PWM) + 3-pos
● 3-pos + On/Off (PWM)
● 2 × 3-pos
✓
✓
✓
✓
✓
✓
✓
● 2 × On/Off (PWM)
● 3-pos + On/Off (PWM)
✓
4-pipe+ el. heater
✓
✓
● 3 × On/Off (PWM)
● On/Off (PWM) + 3-pos + On/Off
(PWM)
✓
✓
✓
✓
✓
✓
✓
● 3 × On/Off (PWM)
✓
4-pipe/2-stage
✓
✓
● 4 × On/Off (PWM)
✓
✓
✓
✓
✓
RDG264KN fan coil and universal (CLC) applications with IAQ control:
FCU
application
CLC
app
3)
Fan
1)
H/C Control outputs
signal combination
Damper signal
2)
DC
3-speed
DC
On/Off
2-pipe
✓
✓
● On/Off
● DC
✓
✓
✓
✓
✓
2-pipe+ RAD
2-pipe+ el. heat
2-pipe/2-stage
4-pipe
✓
✓
● 2 × On/Off
● On/Off + DC
● DC + On/Off
● 2 × DC
✓
✓
✓
✓
✓
4-pipe+ el. heater
✓
✓
● 3 × DC
● On/Off + 2 × DC
✓
✓
✓
✓
✓
4-pipe/2-stage
✓
✓
● 4 × DC
✓
4-pipe with 6-port ball valve
✓
● DC
✓
✓
4-pipe with PICV + 6-port valve as
changeover
✓
✓
● On/Off + DC
✓
✓
1)
Selectable via P351 (Fan speeds)
2)
Selectable via P453 (Indoor air quality damper)
3)
Universal (CLC) applications can be set by switching off the fan functions (P350
= 0)
Note for IAQ control on universal (CLC) heating and cooling systems.
Application can be set as per Applications for universal systems [➙ 45] and by
switching off the fan function (P350 = 0).
On applications without fan control, the thermostat controls the position of the
damper when the IAQ setpoint P023 is exceeded. An independent fresh air system
guarantees fresh air flow to the room.
See the possible combinations of applications, control signals and damper types in
the above table for RDG204KN and RDG264KN.
Frost protection function is not available on universal applications.