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Siemens Central control unit RMB795B CE1P3122en
Building Technologies Contents 18.01.2012
11.1 Overview .................................................................................................95
11.1.1 Direct application.....................................................................................95
11.1.2 Indirect application ..................................................................................96
11.1.3 Explanation example 2-pipe system .......................................................97
11.2 Function "Heat request" ..........................................................................97
11.2.1 Purpose and activation............................................................................97
11.2.2 Operating principle ..................................................................................98
11.3 Function block "Heat demand"................................................................99
11.3.1 Purpose...................................................................................................99
11.3.2 Heat demand relay..................................................................................99
11.3.3 Heat demand modulating ......................................................................100
11.3.4 Communication .....................................................................................101
11.3.5 Functional check / wiring test................................................................101
11.4 Function "Refrigeration request" ...........................................................101
11.4.1 Purpose and activation..........................................................................101
11.4.2 Operating principle ................................................................................101
11.5 "Refrigeration demand" function block..................................................103
11.5.1 Purpose.................................................................................................103
11.5.2 Refrigeration demand relay...................................................................103
11.5.3 Refrig demand modulating ....................................................................103
11.5.4 Communication .....................................................................................104
11.5.5 Functional check / wiring test................................................................104
11.6 Function block "H/C changeover" .........................................................105
11.6.1 Use and functions .................................................................................105
11.6.2 Activate function....................................................................................106
11.6.3 Preselected operating mode input H/C .................................................106
11.6.4 Operating principle ................................................................................107
11.6.5 Lock time ...............................................................................................108
11.6.6 Display current state .............................................................................108
11.6.7 Heating/cooling ch'over relay ................................................................109
11.6.8 Troubleshooting.....................................................................................109
12 Volume flow balancing VAV................................................................110
13 Communication ...................................................................................112
13.1 Activate communication ........................................................................112
13.2 "Communication" menu.........................................................................112
13.2.1 Factory settings.....................................................................................112
13.2.2 Room group 1...10 ................................................................................113
13.2.3 "Distribution zones" menu item .............................................................114
13.2.4 Universal transmission and reception zones ........................................114
14 RXB/RXL operation .............................................................................119
14.1 Operation of individual RXB/RXL room controllers ...............................119
14.2 Special features of setpoint readjustment .............................................120
15 Data acquisition...................................................................................121
15.1 Trend .....................................................................................................121
15.1.1 Connections and application.................................................................121
15.1.2 Views.....................................................................................................121
15.1.3 Trend function settings..........................................................................122
15.1.4 Troubleshooting.....................................................................................123
15.2 Meters ...................................................................................................123
15.2.1 Activate meters .....................................................................................124
15.2.2 Display format .......................................................................................124
