Siemens RDG20 KN Series - Control Sequences; Sequence Overview (Setting Via P001)

Functions
Control sequences
4
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4.7 Control sequences
4.7.1 Sequence overview (setting via P001)
The main control sequence (water coil sequence of the fan coil unit) can be set via
P001.
The following sequences can be activated in the thermostats (with or without
auxiliary heating).
The available sequences depend on the application (selected via DIP switches,
see Application overview [➙ 43]).
Parameter
P001 = 0
P001 = 1
P001 = 2
P001 = 3
P001 = 4
Sequence
Available for
basic
application 1):
⇓
Heating
Cooling
= heating
sequence for
electric
heater/radiator
Automatic
heating/cooling
changeover via
external water
temperature
sensor or remote
switch
Manually select
heating or cooling
sequence (using
HMI)
Heating and
cooling sequence
, that is, 4-pipe
• 2-pipe
• 2-pipe with el. heater
• 2-pipe with radiator
• 2-pipe/2-stage H or C
✓
✓
✓
✓
• 4-pipe
• 4-pipe with el. heater
• 4-pipe/2-stage H and C
(RDG2..KN)
✓
2)
✓
• 4-pipe with 6-port valve
for C/H ceiling
• 4-pipe with PICV + 6-
port valve as
changeover, C/H ceiling
or fan coil
• 4-pipe with 6-port PICV
(RDG26..)
✓
3)
1)
For chilled/heated ceiling and radiator applications, see Chilled/heated ceiling
and radiator applications [➙ 97];
2)
For manual changeover with 4-pipe applications, see 4-pipe fan coil unit [➙ 90].
● 4-pipe manual changeover (P001 = 3) means activating either cooling or
heating outputs
3)
P001 cannot be configured for applications with 6-port ball valve.
For the relationship between setpoints and sequences, see Setpoints and
sequences [➙ 99].