Siemens RCC30 User Manual

2/8
Siemens Room temperature controller CE1N3023en
Building Technologies 2017-11-14
The fan is switched to the selected speed via control output Q1, Q2 or Q3.
When the function “Temperature-dependent fan control“ is activated (can be selected
with DIP switch no.1), the fan is switched on / off depending on the temperature, that is,
together with the valve.
It is switched off by
∂ leaving the heating or cooling sequence, provided the function “Temperature-
dependent fan control “ is activated, or
∂ manually changing to standby , provided plant conditions do not call for frost
protection mode, or
∂ activating an external operating mode changeover switch, provided plant conditions
do not call for energy saving or frost protection mode, or
∂ turning the controller’s power supply off.
The heating valve receives the OPEN command via control output Y11 when
1. the measured room temperature lies by half the switching differential below the
setpoint, and
2. the heating valve has been fully closed for more than one minute.
The heating valve receives the CLOSE command via control output Y11 when
1. the measured room temperature lies by half the switching differential above the
setpoint, and
2. the heating valve has been fully open for more than one minute.
The cooling valve receives the OPEN command via control output Y21 when
1. the measured room temperature lies by half the switching differential plus the dead
zone above the setpoint (x ″ w + x
dz
+ ½ SDC) and
2. the cooling valve has been closed for more than one minute.
The cooling valve receives the CLOSE command via control output Y21 when
1. the measured room temperature lies by half the switching differential plus the dead
zone below the setpoint (x > w + x
dz
- ½ SDC) and
2. the cooling valve has been open for more than one minute.
Heating / cooling mode
Y11
X
dz
? SDH ? SDH
? SDC
? SDC
w
Y21
0
1
1
3023D01
T [ 癈 ]
The RCC30 provides control either depending on the measured room temperature or
depending on the fan coil unit’s return air temperature. Changeover is automatic if a
QAH11.1 cable temperature sensor is connected to the device.
Fan operation
Heating mode
ON
OFF
Cooling mode
ON
OFF
Return air tempera-
ture
T Room temperature
SDH Switching differential "Heating"
SDC Switching differential "Cooling"
X
dz
Dead zone
w Room temperature setpoint
Y11 Manipulated variable "Heating valve"
Y21 Manipulated variable "Cooling valve"

Siemens RCC30 Specifications

General

Brand	Siemens
Model	RCC30
Category	Temperature Controller
Language	English