User Manual

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Siemens RCU50... Room Thermostat CE1N3045en
Building Technologies 2017-11-15
Q
[
]
%
100
0
W2 W
W1
12,5K 12,5K
+12,5K
(K)
T
[
癈
]
(V)
10
5
-12,5K
0
3041D04
W Original setpoint
W1 Highest setpoint at 10 V input
W2 Lowest setpoint at 0 V input
(K) Setpoint shift
(V) Input voltage
The setpoint shift is limited within the range of the unit of 8 °C (frost protection)
to 30 °C.
The water temperature acquired by the changeover sensor (QAH11.1 + ARG86.3) is
used by the room thermostat to switch from heating to cooling mode, or vice versa.
When the water temperature lies above 28 °C, the room thermostat switches to heating
mode, below
16 °C it switches to cooling mode.
CM
HM
T
W
[ 癈 ]
302 5 D0 3
16 28
M
CM Cooling mode
HM Heating mode
M Operating mode
T
W
Water temperature
The room temperature setpoint can be limited in increments of 1 Kelvin by making use
of the minimum and maximum limitation facility. Arbitrary setpoint readjustments can
thus be prevented.
Operating modes
The following operating modes are available:
Normal operation is activated when the operating mode selector is set to “ “ (RCU
50.1) and the external operating mode changeover switch is not activated. In normal
operation, the room thermostat maintains the adjusted setpoint.
Frost protection mode can be activated either
∂ by manually switching to standby (RCU50.1)
∂ by activating the external operating mode changeover switch, provided DIP switch
no. 1 is set to OFF
If the room temperature falls below 8 °C, the room thermostat will automatically switch
to frost protection mode. In that case, the heating valve opens and the room
temperature is maintained at a setpoint of 8 °C. The setpoint adjusted by the user will
be ignored.
Energy saving mode can be activated either
∂ by manually switching to energy saving mode “ “ (RCU50.1)
∂ by activating the external operating mode changeover switch, provided DIP switch
no. 1 is set to ON
In energy saving mode, the setpoint of heating is 16 °C and the setpoint of cooling
28 °C, independent of the position of the setpoint knob.
.
.
Automatic changeover
(RCU50 and RCU50.1)
Energy saver
Normal operation
Frost protection mode
(RCU50 and RCU50.1)
Energy saving mode