User Manual

ManualsBrandsSiemens ManualsOperator unitsMaster room unit for the RRV851 standard control system QAX850

Building Technologies / HVAC Products CE1G2725en 23.03.2005 1/4

G2725

Installation and commissioning guide

Temperature controller

RRV851

Installation

Place of installation

• Mounting choices:

− Control cabinet

− Control panel

− Side of FCU

− Wall, ceiling space, cupboard

• Easy access is required for service personnel

• The controller should not be freely accessible by build-

ing occupants

• Do not install outside without suitable weather protection

• Permissible ambient temperature: 0..50°C

Electrical installation

• The local regulations for electrical installations must be

observed

• Cable restraints must be used for the wires to terminals

L,N,Q.. (AC230V)

• Cable restraints should be used for all wiring to avoid

disconnection (see diagram below)

80160

Permissible cable lengths

• For all field devices: room unit, sensors

− max. 60 m where A ≥ 0.5 mm

− max. 100 m where A ≥ 1.0 mm

• Signal cable type

− 2-wire standard installation cable (unshielded)

− Twisted pair (unshielded) is recom-

mended for enhanced immunity to external electro-

magnetic interference, for example, in the vicinity of

radio transmitters or frequency converters.

• RRV851 controller can be mounted in any orientation

• Ensure adequate air circulation to dissipate heat gener-

ated during operation

DIN rail mounting

1. The housing rail is designed for snap mounting on DIN

rails, type EN50022-35 X 7.5

Surface mounting

1. Hold controller against the surface

2. Mark fixing holes on the wall

3. Drill holes

4. Screw controller to the surface

5. When mounting controller to a FCU, take care not to

damage internal components. E.g. Drilling through

coils

Terminal covers

• The covers will provide IP30 protection when surface

mounting on wall or FCU. IP20 without terminal covers

• The terminal covers include screws for fixing to control-

ler and knock-out holes for cable entry

Summary of content (4 pages)

PAGE 1
G2725 en Installation and commissioning guide Temperature controller RRV851 Installation Place of installation • • • • • Mounting choices: − Control cabinet − Control panel − Side of FCU − Wall, ceiling space, cupboard Easy access is required for service personnel The controller should not be freely accessible by building occupants Do not install outside without suitable weather protection Permissible ambient temperature: 0..
PAGE 2
Connection diagrams RRV851 - Terminals B1 M D1,D2 Signal input (ext. sensor NTC) Signal ground Digital inputs D_GND Digital ground HB+, HB- Communication bus L, N AC 230V supply Q… Y... Digital outputs, AC24..230V, 6(4) A Digital outputs, AC24..230V, 3(1) A RRV851 - Typical connection B1 D1 D2 RS485 N2 485 gnd TX- TX+ D2 D_GND D1 M B1 N1 HB+ HB- HB- Y24 HB+ *the RS485 connections are only suitable for downloading manufacturer specific parameter sets.
PAGE 3
STOP − The pwr LED on the RRV851 will be on − The QAX850 will display all LCD icons for 3 sec- Note! • All Input and bus terminals are not protected against connection to AC 230 V. • AC 24 V outputs must be segregated from AC 250 V outputs. onds and then the software version number for another 3 seconds. It will then revert to normal mode.
PAGE 4
Sensor calibration • Generally there is no need to calibrate sensor, however the displayed room temperature on the QAX850 LCD can be calibrated if there is any discrepancy from the actual temperature measured with a certified thermometer. cali- and bration function can be accessed by pressing the buttons simultaneously for 5 seconds. Displayed value can then be adjusted via the same buttons in 0.1K steps. Range is +/- 3K.