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Siemens Building Technologies Electronic Air / Fuel Ratio Control System CC1P7873.1en
HVAC Products 15.10.2002
4 Product range overview
Electronic air / fuel ratio control unit RVW20.000E27
(without housing)
Standard version for use with electric actuators
(refer to Basic Documentation CC1P7871.2en)
Electronic air / fuel ratio control unit RVW20.001E27
Same as the RVW20.000…, but with changeover of fuel during operation and greater
impact of correcting variables on O
2 trim control
(refer to Basic Documentation CC1P7871.2en)
Electronic air / fuel ratio control unit RVW25.000B27
Same as the RVW20.001E27, but with control of a variable speed drive for control of
the fan speed
(refer to Basic Documentation CC1P7872.1en)
Electronic air / fuel ratio control unit RVW26.000B27
Extension of the RVW25… by 2 output channels
Housing for wall mounting ARG61.040
Housing for flush panel mounting ARG61.010
Tacho-generator interface AGK34.000
Handheld terminal AZW20.20
(with 2 m cable, KF8859) for use with all ECOGYR units RVW2... and RPO2...
Data storage module (exchangeable) RZD20
Cable of 2 m (for use with the AZW20.20) KF8859
Separate cable for handheld terminal (20 m long) KF8860
Exchangeable relay board (plug-in type)
- For use with the RVW20... of series C or higher 4 668 9846 0
- For use with the RVW25... and RVW26... 4 668 9913 0
Units and
accessories