Siemens QAX910 User Manual
CE1N2707en
06.01.2009
Building Technologies
s
2
707
Synco™ living
Central apartment unit
QAX910
Series C
• Management of room control for one apartment including precontrol of
heating for 2 room groups
• Management of ventilation plant
• Management of air conditioners (e.g. split units)
• Selection of operating mode, timer and holidays / special day function for
the apartment
• Autonomous time switches and operating modes for 12 rooms
• Absence function (heating, cooling, ventilation, lights, blinds) with simula-
tion of presence (lights)
• Monitoring of windows and doors
• Summer operation with preselected valve position for cooling mode
• Display of meteorological data
• DHW heating with time switch and selection of operating mode
• Wireless communication with the devices of the Synco living,
GAMMA wave and Hager tebis TX ranges
• Switching groups with softkeys for the control of lights and blinds
• Choice of scenes for light and blind control
• Universal input and output
• Presentation of key data on Info pages
• Wireless (868 MHz, bidirectional) and wired connection for data transmis-
sion conforming to KNX standard
• Mains-powered AC 230 V
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Siemens Central apartment unit QAX910 CE1N2707en
Building Technologies 06.01.2009
Use
• Management of heating control for one apartment
• Increase of Economy room setpoint and of the minimum flow temperature set-
point as a function of the composite outside temperature
• Collection of heat requests from the individual rooms
• Generation of heat request signal and transmission to heat generation via wired
bus, heat demand relay, or DC 0…10 V output to the RRV912 or RRV934 heating circuit controller
• Suited for heating plant with central heat distribution (e.g. floor heating) and radiators with decentralized connections
• Control of heating circuits with RRV912 / RRV918 heating circuit controllers and
SSA955 radiator control actuators
• Flow temperature control of 2 independent room groups with limitation function
(minimum / maximum)
• Maintained return temperature (high / low)
• Control of room group pumps via universal relay outputs
• Control of DHW pump / diverting valve via universal relay output. Acquisition of
DHW temperature via universal input
• Management of ventilation plant via RRV934 multi-controller
• Night cooling function (bypass function of HR)
• Control of air conditioners (split units) via the universal outputs (locally and
RRV91x) or S-Mode (KNX TP1)
• Release of cooling enable contacts per room depending on the composite outside temperature, the current HVAC level, the state of the windows, and a heat
request
• Monitoring of door contacts, window contacts and smoke detectors
• Operation of lights and blinds via softkeys, time switch and events
• Simulation of presence through random switching of lights combined with per-
manent ON of one or several light sources
• Generation, storage and retrieval of scenes
• Display of progression of outside temperature and atmospheric pressure over
the last 24 hours with the help of the QAC910 meteo sensor
• Display of open doors and windows
• Display of weather trend (sunny, cloudy, rainy)
• Remote access via Siemens OZW77x central communication units
Equipment combinations
The central apartment unit can be used in connection with the following RF products of the Siemens Synco living system and those of other suppliers of wireless
KNX products:
Description Product No. Documentation
Room unit QAW910 N2703en
Room temperature sensor QAA910 N2701en
Meteo sensor QAC910 N2702en
Heating circuit controller RRV912 N2705en
Heating circuit controller RRV918 N2706en
Multi-controller RRV934 N2709en
Radiator control actuator SSA955 N2700en
RF repeater ERF910 N2704en
RF adapter plug, switching KRF960-x N2718de
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Siemens Central apartment unit QAX910 CE1N2707en
Building Technologies 06.01.2009
Description Product No. Documentation
RF adapter plug, dimming KRF961-x N2719de
DELTA reflex smoke detector
with wave UNI M 255 smoke alarm module
GAMMA wave Siemens
wave AP260 door and window contacts GAMMA wave Siemens
Light and blind actuators GAMMA wave Siemens
Light and blind actuators tebis TX Funk Hager
The central apartment unit can be used in connection with the following wired products of the Siemens Synco 700 system:
Description Product No. Documentation
Synco 700 controls RM.. S3110
Central communication units OZW771
OZW775
N3117
N5663
Service tool OCI700.1 N5655
Also refer to “Acvatix Valves and Actuators Range overview Z-C00020403EN”.
Additional KNX TP1 devices can be integrated via S-Mode (refer to document
CE1Y3110en).
Description Product No. Documentation
Interface for air conditioners (split units) ZN1CL-IRSC ZENNiO
Ordering
When ordering, please give quantity, product name and product No.
The central apartment unit is supplied complete with Operating Instructions, Mounting and Commissioning Instructions and fixing material.
QAX910 with accompanying documentation in the respective national language.
For example:
German: QAX910-DE
English: QAX910-EN
Functions
The central apartment unit manages space heating, ventilation and DHW heating
control of an apartment with up to 12 rooms.
In addition, it provides control of air conditioners (split units), light and blind actuators and monitors light actuators, door and window contacts as well as smoke detectors.
The QAX910 also serves as an operator and display unit for the apartment.
Scope of delivery
Order numbers
Main functions
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Siemens Central apartment unit QAX910 CE1N2707en
Building Technologies 06.01.2009
Specific functions for heating plants
The central apartment unit generates heat demand signals based on the collected
heat requests and forwards the signals to the controller for heat generation.
The heat demand signals can be delivered via the universal relay output (switching) or the DC 0…10 V output (modulating) of an RRV912 heating circuit controller
or RRV934 multi-controller.
The flow temperature is controlled via the RRV934 multi-controller. It is regulated
with the help of the heat demand signals. Also, minimum and maximum limitation
of the flow temperature can be provided. If the temperature request is invalid, flow
regulation will be deactivated and the controlling elements closed (no output). The
central apartment unit supports 2 room groups (e.g. floor heating and radiators)
which can be controlled independently of one another.
Return temperature limitation is adjustable, enabling it to be kept at a high or low
level. It is thus possible to prevent too hot water from returning to the heat source,
for example. Return temperature limitation is given priority over flow temperature
limitation. It acts on the mixing valve of the room group.
If a room unit and 1 or 2 room temperature sensors are assigned to a room, the
central apartment unit calculates the mean value and uses it for room temperature
control.
Several heating circuits connected to an RRV912 / RRV918 heating circuit controller can be combined to one room and operated in parallel. In that case, the first
channel ensures room temperature control and, at the same time, controls the
other assigned channels.
Up to 6 SSA955 radiator control actuators can be combined to one room and operated in parallel.
In that case, the radiator control actuator connected first (lead controller) ensures
actual room control plus wireless control of the other assigned radiator control actuators (lag controllers).
Several heating circuits connected to a common heat distributor can be jointly controlled as one zone. The zone valve (3-position) is controlled based on the room
temperature acquired by the room unit installed in the reference room and / or the
room temperature sensor.
The central apartment unit ensures release of the room group pumps. The pumps
can be connected either to the internal relay output or a relay output of one of the
RRV912 / RRV918 heating circuit controllers or the RRV934 multi-controller.
The QAX910 can trigger the antilime function at regular intervals, aimed at preventing valve plugs and pump impellers from seizing during longer off periods. The
function ensures that the valve actuators will travel to the fully open and then to the
fully closed position and that the pumps will be activated for short periods of time
(valve kick). Both frequency and time of day at which the function is performed can
be selected.
The antilime function acts either locally or on plant components connected to the
RRV912 / RRV918 heating circuit controller and the wireless SSA955 radiator control actuators.
Heat request
Flow temperature
control / limitation
Return temperature
limitation
Room unit / room
temperature sensor
Parallel operation
of heating circuit
controllers
Parallel operation
of radiator control
actuators
Zone control
Room group pumps
Antilime function
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Siemens Central apartment unit QAX910 CE1N2707en
Building Technologies 06.01.2009
The Economy room temperature setpoint is increased as a function of the composite outside temperature. Changeover is adjustable and helps prevent load peaks
when changing from Economy to Precomfort or Comfort for instance.
The minimum flow temperature setpoint is raised as a function of the composite
outside temperature, thus ensuring a minimum flow temperature for uncontrolled
rooms.
The central apartment unit triggers summer operation. Changeover can be accomplished as follows:
Manually, date-related, according to the attenuated outside temperature, via a digital input, or through active changeover to cooling mode.
The heating circuit valves connected to an RRV912 / RRV918 heating circuit controller have the position 0% or 100% and the SSA955 radiator control actuators will
be driven to the preselected valve positions.
The QAX910 provides DHW control with the help of a specific DHW time switch.
DHW heating is either enabled or disabled based on the temperature acquired by
the DHW temperature sensor connected to the QAX910 or an RRV912 / RRV918 /
RRV934.
The signal for DHW charging or changeover is delivered either via the internal relay output or the relay output of an RRV912 / RRV918 heating circuit controller or
RRV934 multi-controller. DHW charging can take place via diverting valve / charging pump and / or an electric immersion heater.
Specific functions for ventilation equipment and air conditioners
The QAX910 controls ventilation plant with a maximum of 3 stages via an RRV934
multi-controller. The ventilation stages can be controlled either manually, via a 7day program, indoor air quality sensor or humidity sensor. Ventilation can be influenced by absence, the holiday function or an open window.
The following operation and control functions are available:
− The apartment timer activates apartment operating mode Comfort for an adjustable
period of time
− Forced ventilation activates the highest ventilation stage for a predefined period of
time
− In summer operation, cooler outside air passes through the HR bypass during the
periods of time night cooling is active
− Counting the number of operating hours for delivering a service message
− Release of kitchen exhaust hood via an open window to ensure sufficient amounts of
air are made available
− Display of active fireplace ventilation mode (external plant)
Each room can be assigned one cooling release contact for switching an air conditioner (e.g. split unit).
Release can take place via the local relay contact of the central apartment unit, the
relay contacts of the RRV912 / RRV918 heating circuit controllers, the RRV934
multi-controller, the RF adapter plug KRF960-x, or via S-Mode.
By integrating the ZENNiO interface (S-Mode TP1), operating mode, setpoint and
release of the air conditioner (e.g. split unit) per room can be controlled via the
central apartment unit. Heating and cooling mode of the air conditioner can be
supported.
The air conditioner ensures autonomous room temperature control.
Outside temperaturedependent night setback
Minimum flow
temperature setpoint
Summer operation
DHW charging /
DHW control
Ventilation
Release contact
for cooling
Air conditioner via
ZENNiO module
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