Siemens QAA73.210 User Manual
s
Room Unit for Boiler Control
With OpenTherm Interface
User manual
QAA73.210
Edition 1.1
Device series A
CE1U2283en
2015-09-16 Building Technologies
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Siemens Room Unit for Boiler Control CE1U2283en
Building Technologies 2015-09-16
Siemens Switzerland Ltd
Building Technologies Division
International H eadquart ers
Gubelstr asse 22
6301 Zug
Switzerland
Tel. +41 41-724 24 24
www.siemens.com/buildingt echnologies
© Siemens Switzerland Ltd, 2010
Subject to change
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Building Technologies Table of contents 2015-09-16
Table of contents
1 Overview .............................................................................................. 5
1.1 Features ................................................................................................ 5
1.2 Product liability ...................................................................................... 6
1.3 Disposal ................................................................................................ 6
2 Mounting and Installation .................................................................... 6
2.1 Engineering ........................................................................................... 6
2.2 Installation ............................................................................................. 7
2.3 Electrical installation .............................................................................. 8
3 Commissioning .................................................................................... 9
3.1 Operational faults................................................................................... 9
4 Handling ............................................................................................. 10
4.1 Operation............................................................................................. 10
4.2 Programming room units parameters ................................................... 15
4.2.1 User levels ........................................................................................... 15
4.2.2 Overview of settings............................................................................. 16
4.3 Programming Siemens BMU parameters ............................................. 18
5 Description of room unit settings ..................................................... 19
5.1 Time and day (TIME) ........................................................................... 19
5.2 Time switch program (TSPHC, TSPCC, TSPHW) ................................. 19
5.2.1 Day selection ....................................................................................... 19
5.2.2 Switching times .................................................................................... 20
5.3 Heating circuit (HEAT).......................................................................... 20
5.4 Cooling circuit (COOL) ......................................................................... 27
5.5 Domestic hot water (DHW)................................................................... 27
5.6 Configuration (CONF) .......................................................................... 29
6 Functions ........................................................................................... 30
6.1 Types of compensation ........................................................................ 30
6.1.1 Weather compensation ........................................................................ 30
6.1.2 Weather compensation with room influence ......................................... 30
6.1.3 Room compensation ............................................................................ 31
6.1.4 Fix flow temperature setpoint ............................................................... 31
7 Dimensions ........................................................................................ 32
8 Technical data .................................................................................... 33
Index ............................................................................................................ 34
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Building Technologies Table of contents 2015-09-16
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Siemens Room Unit for Boiler Control CE1U2283en
Building Technologies Overview 2015-09-16
1 Overview
The QAA73.210 is a digital multi-functional room unit for one or 1 heating circuits
and d.h.w. control.
Boiler control delivers the outside temperature and other information to the
QAA73.210 room unit via the OpenTherm communication interface. Based on the
outside temperature, the room temperature and a number of other parameters, the
interface calculates the required flow temperature setpoints for the heating circuits
and transmits them to the boiler control. In addition, the d.h.w. temperature
setpoint is transmitted to the boiler control.
The optimization functions offer energy savings without sacrificing comfort. The
room sensor required for that purpose is integrated in the unit.
1.1 Features
· Operating sections (operating levels) based on ergonomic and functional
considerations
· Clear assignment of basic functions:
· Operating mode, setpoint adjustment and occupancy button
· A number of actual values can be accessed via the Info button
· Additional functions can be programmed via programming mode
· Every setting or change is displayed and thus acknowledged
· Heating circuit program with up to 4 heating periods per day can be selected on
an individual basis
· Cooling circuit program with up to 4 heating periods per day can be selected on
an individual basis
· D.h.w. program with up to 4 heating periods per week can be selected on an
individual basis
· Holiday function
· Special mode for setting the parameters of Siemens boiler control systems
· Weather-compensated flow temperature control while giving consideration to the
building’s thermal dynamics
· Weather-compensated flow temperature control with room compensation
· Pure room temperature control
· Effect of room temperature deviation can be adjusted
· ECO functions (24-hour limit switch, automatic summer / winter changeover)
· Room temperature switching differential for limiting the room temperature
· Adjustable maximum limitation of the flow temperature (especially in connection
with floor heating systems)
· Frost protection for the building
· D.h.w. control with release and preselection of setpoint for the boiler controller
· Legionella function
· Integrated clock with a reserve of at least 12 hours
· Communication with the boiler control via OpenTherm interface
· Power supply via OpenTherm bus
Brief description
Operating functions
Functions
Other features
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Building Technologies Mounting and Installation 2015-09-16
1.2 Product liability
· The products may only be used in building services plant and applications as
described above
· When using the products, all requirements specified under "Technical data"
must be observed
· The local regulations for electrical installation must be complied with
1.3 Disposal
The device is classified as waste electronic equipment in terms of the European
Directive 2002/96/EC (WEEE) and should not be disposed of as unsorted municipal waste.
The relevant national legal rules must be adhered to.
Regarding disposal, use the systems setup for collecting electronic waste.
Observe all local and applicable laws.
2 Mounting and Installation
2.1 Engineering
· In the main living room or reference room
· The place of installation should be chosen so that the sensor can capture the
room temperature as accurately as possible, without being affected by direct
solar radiation or other heating or cooling sources.
· Mounting height is about 1.5 meters above the floor
· The unit can be fitted to most commercially available recessed conduit boxes or
directly on the wall.
Mounting location
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Building Technologies Mounting and Installation 2015-09-16
2.2 Installation
· Wall
· Boiler control panel
· The controller may not be exposed to dripping water
· Permissible ambient temperature: 0...50 °C
Step 1 Open the unit at the bottom and remove the
base from the housing front.
Step 2 Connect the bus cable to the screw
teminals.
Step 3 Fit the base to the wall with the help of
screws.
Step 4 Engage the housing front at the top of the
base and close the unit to the bottom.
Mounting conditions
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Building Technologies Mounting and Installation 2015-09-16
2.3 Electrical installation
The local regulations for electrical installations must be complied with.
12COA
COB
OpenTherm terminal A (interchangeable)
OpenTherm terminal B (interchangeable)
23 mA max
Regulations for
installation
Connection diagram
1
2
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Building Technologies Commissioning 2015-09-16
3 Commissioning
Prior to commissioning the controller, make the following checks:
· Correct mounting
· Correct connection to OpenTherm bus
· Enduser parameters are set as required
· Heating engineer parameters are set in compliance with plant requirements
At first power up or after a long off period (no power supply), "CLOW" is displayed
on the LCD for some minutes.
During this first period it is not possible to visualize or change parameters, the
other functions are running. After some minutes a minimum back-up time is
reached and the full functionality is available
3.1 Operational faults
No display on the room unit:
Is the heating plant's main switch turned on?
· Are the fuses in order?
· Check the wiring
· Boiler controller
Does boiler control really have to operate?
· Press boiler control’s lock-out reset button
· Check wiring and fuse of boiler control
· Check the communication link to boiler control
The room temperature does not agree with the required temperature level:
· Does the room temperature setpoint agree with the required temperature level?
· Is the required operating mode indicated?
· Are weekday, time of day and the displayed heating program correct?
(Info displays)
· Has the heating curve slope been correctly set?
· Check wiring of outside sensor
· Has the "Nominal room temperature setpoint" with the "Parallel displacement of
the heating curve" been calibrated based on the effective room temperature?
· Check boiler control
D.h.w. is not being heated:
· Has the button for d.h.w. heating been pressed?
· Check setpoint of the d.h.w. temperature
· Check d.h.w. function of boiler control
Prerequisites
Room unit
Boiler control does not
switch on
Room temperature
D.h.w.
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Building Technologies Handling 2015-09-16
4 Handling
4.1 Operation
Operating element Function
Heating circuit operating
mode button and associated
symbols
Operating mode changes to:
Automatic operation
Continuous operation
Protection
Temporary function
D.h.w. operating mode button
with associated symbol
D.h.w. heating ON / OFF
Setpoint buttons Heating
Adjustment of room temperature setpoint
Setpoint buttons D.H.W.
Adjustment of D.H.W. temperature setpoint
Info button
Change of info display
Occupancy button
Changeover of operating level
LCD
Display of data and operating mode
DHW mode ON Space heating mode ON
Boiler operation for DHW heat
demand
Boiler operation for heating circuit
heat demand
Maintenance message Automatic operation
Holiday function Temporary function
Heating to Comfort setpoint Continuous operation
Heating to Reduced setpoint Protection
Boiler on
Operating elements
Legend
Display icons
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Building Technologies Handling 2015-09-16
Display of all symbols and segments.
Selection of space heating mode
This setting is used to switch between the different operating modes.
The selection made is indicated by a bar which appears below the respective
symbol.
Automatic mode controls the room temperature according to the time program.
Characteristics of automatic mode:
· Heating mode according to the time program
· Temperature setpoints according to the heating program "Comfort setpoint" or
"Reduced setpoint"
· Protective functions active
· Automatic summer / winter changeover and automatic 24-hour
heating limit (ECO functions) active
Continuous operation maintains the room temperature at the selected operating
level.
Characteristics of continuous operation:
· Heating mode with no time program
· Protective functions active
· Automatic summer / winter changeover and 24-hour heating limit (ECO
functions)
inactive in the case of continuous operation with Comfort setpoint
When using Protection mode, the heating system is off, but it remains protected
against frost (frost protection temperature) provided there is no power failure.
Characteristics of Protection:
· Heating off
· Temperature according to frost protection
· Protective functions active
· Automatic 24-hour heating limit (ECO functions) active
Cooling mode controls the room temperature in accordance with the time program.
Characteristics of cooling mode:
· Manual cooling mode
· Cooling mode based on time program
· Temperature setpoint based on "Comfort setpoint" or "Reduced setpoint"
Display
Automatic mode
Continuous operation
Protection
Cooling mode
(if activated)
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