Programming The Rvw26 - Siemens RVW26.000B27 Basic Documentation

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HVAC Products
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Programming the RVW26...

The RVW26... is programmed (setting the parameters and matching the unit to the
specific plant conditions) with the help of the handheld terminal AZW20.20.
The RVW26.00B27 is switched from operating mode (programming level 0) to pro-
gramming mode with the help of the AZW20.20, using buttons «ç / è».
The change can only take place in phases 0, 8, 9 and «R».
In all other phases, the buttons of the handheld terminal are inactive.
It is not possible to change parameters.
The display of the AZW20.20 shows the burner's output and the positions of the actua-
tors.
In programming mode, the parameters of the RVW26... can be changed.
The RVW26... indicates the programming mode by letting its fuel LED flash.
If the unit is switched to programming mode (phase «R») while the burner is running,
the burner continues to run like in normal operation.
Positioning signals of the RVW25... are executed to ensure the burner continues to op-
erate together with air / fuel ratio control (output adjustments with the handheld terminal
on programming level 5 are not possible).
To set the curves in this mode, 2 AZW20.20 are required (one for the RVW25... and
one for the RVW26...).
The operator is now in control of the burner and the programmed load positions can be
changed by him.
When, during burner off times (phase «0») or during the shutdown sequence (phases
8, 9), a change is made to programming mode, the RVW26... deenergizes terminal
«Q1», in which case the burner can no longer be started up.
This operating state can be used to make the basic burner parameter settings.
After programming, the programming level must be changed to store the data.
Also, in programming mode, the RVW26... stores its data automatically at 20-second
intervals.
During the storage process, the display shows the current programming level «X».
Note:
Having set the parameters of the RVW26... in programming mode while the burner is
off, a change to operating mode (programming level 0) must first be made to start the
burner.
When the burner is running (phase «R»), a change to programming mode can be made
again to optimize the settings
Electronic Air / Fuel Ratio Control System
15 Programming the RVW26...
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CC1P7873.1en
15.10.2002