Basic Documentation

207/332
Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies IAQ controller (basic types A and P) 03.10.2011
16 IAQ controller (basic types A and P)
a
IAQ controller
The ventilation plant controls room temperature and supplies the rooms with fresh
(high quality) air.
The IAQ controller is tasks, by demand, i.e. issue a positioning signal to the fan or
air damper based on the air quality measured in the rooms. Fans or air dampers
control to Comfortable air quality. In addition to Comfort, the rooms are optimized
for energy consumption based on occupancy (auditoriums, conference rooms,
offices, restaurants, etc.).
Demand-dependent ventilation can save energy since ventilation is switched on
only when the room requires air as well. In that case, it is not only the fans’ power
for air transportation that is saved, but heating / cooling losses for air renewal in the
room are kept to a minimum.
 The IAQ controller offers the following functions based on measured air quality
(CO2 or CO2/VOC value):
 Open the outside air damper (basic types A and P)
 Switch on the fans or ventilation plant (basic type A)
 Changeover fan speeds (basic type A)
 Increase fan speed (basic type A and P)
16.1 Activate function
This function is activated by assigning an input to the function block. Only ppm
inputs DC 0...10 V (see section 8.2 "Analog inputs") can be assigned.
Main menu > Commissioning > Extra configuration > IAQ controller >
Operating line Adjustable values / remarks
Input ---, N.X1, N.X2, ... (only ppm)
16.2 Open outside air damper (basic types A and
P)
To enable the air damper to open, a modulating damper must be configured (see
section 10.5 "Mixed air damper (basic types A, P)"). The air damper opens
according to the followi
ng diagram:
100 %
0 %
Xp
Y
CO2/VOC
3150D01
w*
* Air damper setpoint
Configuration
Function diagram