Siemens Building Technologies
Basic Documentation RVL470
CE1P2522E / 30.03.2000
Landis & Staefa Division
Communication
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17. Communication
17.1. Combination with room units
17.1.1. General
•
Room units can be used with the RVL470 only if one of the plant types 1, 2 or 3 has
been selected on the controller
•
The room temperature acquired by a room unit is adopted by the RVL470 at terminal
A6. If the room temperature signal delivered by the room unit shall not be considered
by the control functions, the respective source need to be selected (operating line 65).
The other room unit functions will then be maintained
•
The connection of an unsuitable room unit is detected by the RVL470 as a fault and
displayed as such on operating line 50 (error code 62)
•
Faults that the room unit detects in itself are displayed by the RVL470 on operating
line 50 (error code 61)
•
The identification number of the room unit can be called up on operating line 196
17.1.2. Combination with room unit QAW50
The QAW50 can act on the RVL470 as follows:
•
Overriding the operating mode
•
Readjustment of room temperature
For this purpose, the QAW50 has three operating elements:
•
Operating mode button
•
Economy button (also called presence button)
•
Setting knob for room temperature readjustments
17.1.2.1. Overriding the operating mode
From the QAW50, the operating mode of the RVL470 can be overridden. This is made
with the operating mode button and the economy button.
To enable the room unit to act on the RVL470, the following operational conditions must
be satisfied on the controller:
•
AUTO mode
•
No holiday period active, no manual operation
The effect of the QAW50's operating mode button on the RVL470 is as follows:
Operating mode
QAW50
Operating mode RVL470
AUTO; temporary overriding with economy button possible
Continuously NORMAL heating or continuously REDUCED
heating, depending on the economy button
Standby
17.1.2.2. Setting knob for room temperature readjustments
Using the setting knob of the QAW50, the room temperature setpoint of NORMAL
heating can be readjusted by ±3 °C.
The setting of the room temperature setpoint on the controller's operating line 1 will not
be affected by the QAW50.
17.1.3. Combination with room unit QAW70
Using the QAW70, the following functions can be performed or the room unit can act on
the RVL470 as follows:
