User Manual

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Siemens Room temperature controller CE1N3022en
Building Technologies 2017-11-14
Heating mode Cooling mode Automatic changeover
1
0
SDH
Y11
W
3021D01
T [ 癈 ]
1
0
SDC
Y11
W
T [癈]
3021 D 02
CM
HM
M
T
W
[癈]
3021 D0 3
16 28
CM Cooling mode T
W
Water temperature
HM Heating mode w Room temperature setpoint
M Operating mode Y11 Manipulated variable “Valve“
SDC Switching differential “Cooling“ T Room temperature
SDH Switching differential “Heating“
The task of the changeover sensor is to initiate the change from heating to cooling
mode even if the two-port valves are shut down for a longer period of time. To ensure
this function, the valves are opened for one minute at 2-hour intervals during off hours.
(Note: this function is not active when using thermal actuators).
In addition to hot water heating operation, the electrical heater receives an ON com-
mand via Y21 when
1. the measured room temperature is x ′ w , w
D
, ½ SDH, and
2. the electrical heater has been switched off for more than one minute.
The OFF command for the electrical heater is given when
1. the measured room temperature is x ″ w , w
D
∗ ½ SDH, and
2. the electrical heater has been switched on for more than one minute.
When two heating sequences are selected, the two outputs cannot be switched ON the
same time . Two outputs must be switched ON seperately with at least 1 minute delay.
In case of set-point change, the two heaters are allowed to switch OFF together.
For this operation, DIL switch no.8 must be set to ON (factory setting).
The electrical heater receives the ON command via control output Y21 when
1. the measured room temperature lies by half the switching differential below the
adjusted setpoint, and
2. the electrical heater has been switched off for more than one minute.
The OFF command for the electrical heater is given when
1. the measured room temperature lies by half the switching differential above the
adjusted setpoint, and
2. the electrical heater has been switched on for more than one minute.
Heating mode (hot water plus electric) Cooling mode with optional electric heating sequence
(DIP switch no.8 = ON)
w
D
1
0
1
? SDH ? SDH
? SDH ? SDH
w
Y11
Y21
3022D01
T [癈]
X
dz
? SDH ? SDH
1
0
1
? SDC? SDC
Y11
Y21
3022D04
w
T [癈]
Purging function
Electric heating op-
eration, active in the
heating sequence
Electric heating op-
eration, active in the
cooling sequence