Siemens QAX850 User Manual

CE1N2722en
28.08.2007
Building Technologies
HVAC Products
2
722
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
A
pplication
Primary functions
Operator functions

Siemens QAX850 Specifications

General

Output Signal	DC 0…10 V
Operating Voltage	DC 24 V
Output Voltage	DC 0...10 V
Number of Channels	1
Protection Class	IP30
IP rating	IP30
Power Supply	DC 24 V

Summary

Use

Application

Details usage of the room unit in air based HVAC plants and system types.

Functions

Primary functions

Core capabilities including remote control, monitoring, and parameter adjustment.

Operator functions

User-accessible features like time clock, setpoint adjustment, and fan speed control.

Mechanical design

Components

Lists the main parts of the QAX850 unit, including sensor and interface elements.

Operating elements

Details the physical buttons and displays on the unit for user interaction.

LCD display

Commissioning notes

Guidance on initial setup, including start-up behavior, sensor calibration, and time setting.

Commissioning

Set-up parameters

Lists configurable parameters for system setup and operation.

Internal sensor

Mounting and installation notes

Technical data

Interfaces (S+, SG)

Specifies communication interfaces and protocols used by the unit.

Permissible cable lengths

Defines maximum cable lengths for bus communication.

Electrical connections (HB+, HB-)

Details the screw terminals for electrical wiring and wire gauge.

Degrees of protection

Indicates the housing's protection rating against solids and liquids (IP30).

Environmental conditions

Specifies operating and transport limits for temperature and humidity.

Classification to EN 60 730

Details classification according to EN 60 730 standards.

Materials and colors

Lists the materials and colors used for the unit's housing and packaging.

Norms and standards

Electromagnetic compatibility

Covers immunity and emissions standards for electromagnetic compatibility.

CE conformity

Confirms compliance with European directives (EMC, Low-voltage).

Room temperature measurement

Connection diagram

Dimensions

Room unit

Provides physical dimensions for the QAX850 room unit in millimeters.

Base

Provides physical dimensions for the mounting base in millimeters.