Siemens QAX850 Bedienungsanleitung

CE1N2722en

28.08.2007

Building Technologies

HVAC Products

2722

Master room unit QAX850

for RRV… controllers

Multifunctional, digital room unit for installer and end-user interface with RRV…

controllers.

2 wire bus connection

Use

Room unit in combination with an RRV… controller for HVAC plants in:

•Residential apartments

•Residential single house

•Autonomous light commercial applications

For use with RRV… controllers in air based plants including heating, cooling and

ventilation (HVAC) equipment. Suitable for Standard, Duo-zone, Duo-switch and Multi-

zone applications.

Functions

•Remote control and monitoring of an RRV… controller

•Parameter adjustments by installer

•Room temperature measurement

•Time clock operation

•Comfort temperature setpoint adjustment

•Energy saving temperature setpoints adjustment

•Auto timer selection

•Fan speed selection

•Zone selection and settings (only for RRV controllers with zone outputs)

•Display of operating mode, temperature, time, fan speed and zone values.

Use

pplication

Primary functions

Operator functions

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Siemens Master room unit QAX850 CE1N2722en

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Type summary

Type reference Description Compatible with*

QAX850 Master room unit •Temperature controller RRV851

•Temperature controller RRV852

•Temperature controller RRV856

•Zone room unit QAW850

* Not usable with Desigo RX range of controllers

Product documentation

Document Document number

Data sheet N2722

Mounting instructions M2721

Operating instructions for use with RRV81 B2725en01

Operating instructions for use with RRV82 B2726en01

Operating instructions for use with RRV82 (duo-switch) B2726en03

Operating instructions for use with RRV86 B2727en01

Declaration of conformity T2722

Mechanical design

The QAX850 is the installer/OEM/end-user master MMI for RRV controllers.

The unit consists of the following components:

•Room unit with integrated electronics and operating elements

•Internal temperature sensor

•Base for wall mounting with the connection terminals

•Operator interface buttons (high use)

•Operator interface buttons behind door (low use)

2722P01

1 LED for heat/cool output status

2 LCD display with EL backlight for control and monitoring of modes,

setpoints, zone conditions etc

3 Operating mode selection – Comfort, energy saving and auto timer

(RRV852 Day/Night zone selection for Duo-zone application)

4 Temporary setpoint and value increase/decrease

5 System off and fan speed control

6 Heat, cool, heat/cool changeover and ventilation only selection

7 Time and weekday setting

8 Auto timer schedule setting

9 Zone output selection (RRV856 and RRV852 for Duo-switch application)

10 Permanent comfort and energy saving setpoints (Day/Night/Both setpoints

for RRV852 Duo-zone application)

11 Button for confirming values and scrolling through parameter sets

Components

Operating elements

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Siemens Master room unit QAX850 CE1N2722en

Building Technologies 28.08.2007

10 11

2722Z01

1 Day indication

2 Actual temperature

3 Fahrenheit/Celsius

4 Zone indication (RRV856 and RRV852 for Duo-switch application)

5 AM/PM indication

6 Time display

7 System off

8 Comfort mode (Day zone in Duo-zone application)

9 Energy saving mode (Night zone in Duo-zone application)

10 Auto timer mode

11 Heating mode

12 Cooling mode

13 Fan speed indication (low, medium and high)

14 Auto fan mode

Commissioning notes

When powering up, the QAX850 will display all LCD icons for approximately 3 seconds

and then the software version number for another 3 seconds. It will then revert to

normal display. The time segments will be blinking if time needs to be set. Set time as

per Operation Instructions. There will be a delay before operation commences due to

polling of all values.

Generally there is no need to calibrate sensor; however the displayed room

temperature on the LCD can be calibrated if there is any discrepancy from the actual

temperature measured with a certified thermometer. Calibration function can be

accessed by pressing the and buttons simultaneously for 5 seconds. Displayed

value can then be adjusted via the same buttons in 0.1K steps. Range is ±3 K.

Initial application set-up of RRV controller to match the connected HVAC equipment is

made by the selection of dip switch positions. Dip switches are located on the top of the

RRV controller. Further settings can be made via the QAX850 by modifying parameters

as per list below. Default values are dependant on application selected and RRV

controller model. Refer to Installation Instructions for set-up details and application

sheets for default parameter values.

To access parameters press the and buttons simultaneously for 3 seconds, then

within 2 seconds press the button for 3 seconds and release. Parameters cannot be

accessed if system is in off mode.

No. Parameter Range

P00 Temperature scale °C/F°

P01 Frost protection limit in OFF mode Off/5…8 °C

P02 Over-temperature limit in OFF mode Off/30…35 °C

P03 Min. OFF time delay 0…600 s

P04 Min. ON time delay 0…600 s

P05 Dead band between cool and heat OFF points 0.5…6 K

LCD display

Response on start-up

Sensor calibration

Commissioning

Set-up parameters

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No. Parameter Range

P06 RV ON in heat or cool mode Heat/Cool

P07 Fan run ON after heat output turns Off 0…300 s

P08 Fan run ON after cool output turns Off 0…300 s

P09 FCU flush pipe time 120…600 s

P10 Zone Heat / Cool Inhibit Heat/Cool/No

P11 Water temp. heat mode changeover 22…32 °C

P12 Water temp. cool mode changeover 10…21 °C

P13 Fan auto-speed high range H:80…100 %

P14 Fan auto-speed medium range M:30…75 %

P15 Fan auto-speed low range L:1…15 %

P16 Window contact NO/NC

P17 2-p or 3-p control selection 2-p/3-p

P18 P-band in heat mode /Switching differential 0.5…10 K

P19 P-band in cool mode /Switching differential 0.5…10 K

P20 Integration time 0…60.0 min in

0.5 min steps

P21 3-p valve actuator running time 50…300 s

P22 Zone capacity weight None

Small

Medium

Large

P23 Ventilation in dead zone Off, H/C, C only

QAX850 internal sensor can be replaced by connecting an external NTC resistor

sensor (QAA32 or QAH11) to the RRV controller B1 input. In this case the QAX850

automatically recognizes and displays the external sensor value.

Mounting and installation notes

The QAX850 should be mounted in a location where the air temperature can be

measured as accurately as possible without getting adversely affected by direct solar

radiation or other heating or cooling sources. There is no need to consider air

temperature conditions if external sensor is connected to the RRV controller. In this

case the QAX850 would serve as a master control unit only.

•Mounting height is about 1.5 m above the floor.

•QAX850 must not be located in the direct path of air conditioning air flow.

•The unit can be fitted to a recessed conduit box.

•The specified ambient conditions must be complied with.

•Only authorized staff may disconnect the QAX850 unit from base plate.

•Do not mount in recesses, shelves, behind curtains or doors.

•Refer to Mounting Instructions M2721 included in packaging box.

When mounting the unit, fix the base-plate first and then make the electrical

connections. To avoid any damage during construction works only install QAX850 unit

Internal sensor

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Siemens Master room unit QAX850 CE1N2722en

Building Technologies 28.08.2007

when all construction works have been completed. The QAX850 must be mounted on a

flat surface and in compliance with local regulations.

Local installation regulations must be observed.

The room unit is not protected against connection to AC 230 V!

Technical data

Interfaces (S+, SG) HCC bus proprietary protocol

Bus power supply voltage DC 12 V, +10, –15% (supply

RRV85x controller)

Baud rate 9.6 kbit/s

Room unit power consumption 2 VA

Permissible cable lengths For bus communication

A ≥0.5 mm²

A ≥1 mm²

max. 60 m

max. 100 m

Type of cable 2-wire standard installation cable

(unshielded)

Note:

Twisted pair (unshielded) is recommended for enhanced

immunity to external electromagnetic interference, e.g. in the

vicinity of radio transmitters or variable speed drives

Electrical connections

(HB+, HB–) Connection terminals

For wires

screw terminals

0.6 mm dia. … 2.5 mm2

Degrees of protection Degree of protection of housing to IEC 60 529 IP 30

Safety class to EN 60 730 device suited for use with equipment

of safety class II

Environmental conditions Operation to

Climate conditions

Temperature (housing and electronics)

Humidity

Mechanical conditions

IEC 721-3-3

class 3K5

0…50 °C

5…95 % r. h. (non-condensing)

class 3M2

Transport to

Climate conditions

Temperature

Humidity

Mechanical condition

IEC 721-3-2

class 2K3

–25…+70 °C

<95 % r. h.

class 2M2

Classification to EN 60 730 Mode of operation, automatic controls type 1B

Degree of contamination, controls Environment 2

Rated surge voltage 4000 V

Software class A

Materials and colors Top housing Polycarbonate, RAL 9003 (signal-

white)

Bottom housing and base plate Polycarbonate, RAL 7035 (lightgrey)

Packaging corrugated cardboard

Norms and standards Product safety

Automatic electrical controls for household and

similar use

Special requirements for temperature sensing

controls

EN 60 730-1

EN 60 730-2-9

STOP Note

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Siemens Master room unit QAX850 CE1N2722en

Building Technologies 28.08.2007

Electromagnetic compatibility

Immunity domestic section, light industry

Emissions domestic section, light industry

EN 61 000-6-1

EN 61 000-6-3

-conformity

EMC directive

Low-voltage directive

89/336/EEC

73/23/EEC

N474 conformity to

Australian EMC framework

Radio interference emission Standard

Radio Communication Act 1992

AS/NZS 4251.1

Measuring range 0…49 °C

Room temperature

measurement Setpoint range 5…35 °C

Accuracy at 20 °C max. ±0.5 K

Temperature calibration range max. ±3.0 K in increments of 0.5 K

Room temperature display resolution 0.5 K

Weight Excluding packaging approx. 0.1 kg

Notes

•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.

•Local regulations for electrical installations must be complied with.

Connection diagram

N1 A1

HB+

HB-

HB+

HB-

2723A01

A1 QAX850 master room unit

N2 RRV… controller

Product liability

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Siemens Master room unit QAX850 CE1N2722en

Building Technologies 28.08.2007

Dimensions

Room unit

119

23,8

3031M01

Base

89,45

3031M02

28 28

2828

26 30

3530

11,8

112,3

Dimensions in mm

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