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Siemens Building Technologies Electronic Air / Fuel Ratio Control System CC1P7873.1en
HVAC Products 15.10.2002
12 Data storage module RZD20......................................................................... 35
12.1 Procedure for replacing the RVW26.............................................................. 36
13 Functional readiness and faults.....................................................................37
14 Error codes and rectification of faults ............................................................ 38
14.1 Types of faults and troubleshooting............................................................... 38
14.2 Error code table with hints on troubleshooting ..............................................39
15 Programming the RVW26..............................................................................42
15.1 Structure of the display.................................................................................. 44
16 Applications ...................................................................................................51
16.1 Basic diagram of a plant with a modulating burner (one type of fuel)............ 51
16.2 Basic diagram of a plant with a modulating burner (one type of fuel)............ 52
17 Engineering notes.......................................................................................... 53
17.1 Requirements placed on burner design......................................................... 53
17.2 Engineering ................................................................................................... 55
17.3 Requirements placed on the actuators and potentiometers .......................... 56
17.4 Requirements placed on the variable speed drive and the fan speed
feedback signal ................................................................................................58
18 Notes on the commissioning of a burner.......................................................59
18.1 Setting instructions for the RVW26................................................................61
18.2 Permissible range of curvepoints ..................................................................63
18.3 Setting report ................................................................................................. 64
19 Technical data ............................................................................................... 68
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