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Siemens REV23RF Manual

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Siemens Building Technologies Raumtemperaturregler REV23RF CE1N2265en
HVAC Products 20.08.2002
The controller generates the positioning signals depending on the deviation of the set-
point from the actual value acquired by the built-in temperature sensor.
The rate of response to the deviation depends on the selected control algorithm:
The controller is supplied with an active self-learning mode, enabling it to automatically
adapt to the type of controlled system (building construction, type of radiators, size of
the rooms, etc.). After a certain learning period, the controller optimizes its parameters
and then operates with the parameters it has learned.
In exceptional cases, where the self-learning mode may not be ideal, it is possible to
select PID 12, PID 6 or 2-Pt mode:
PID 12 mode Switching cycle of 12 minutes for normal or slow controlled systems
(massive building structures, large spaces, cast-iron radiators, oil
burners).
PID 6 mode Switching cycle of 6 minutes for fast controlled systems (light building
structures, small spaces, plate radiators or convectors, gas burners).
2-Pt mode Pure 2-position control with a switching differential of 0.5 °C (±0.25 °C)
for very difficult controlled systems with considerable outdoor tem-
perature variations.
Protects the pump against seizing during longer off periods. Periodic pump run is acti-
vated for one minute every 24 hours at midnight. This function can be selected on the
heating engineer menu.
Periodic pump run active:
/ periodic pump run inactive:
The controller is suited for cooling applications.
The function can be selected on the heating engineer menu.
The controller comes set for heating operation (refer to section «Factory settings»).
User-defined data:
Press the button behind the pin opening for at least one second: This resets the user-
specific settings to their default values (heating engineer settings will not be changed).
The clock starts at 12:00. During the reset time, all sections of the display are lit, ena-
bling them to be checked.
All user-defined data plus the heating engineer settings:
Press the button behind the pin opening together with the warmer and colder buttons
for at least one second.
After the reset, all factory settings will be reloaded (also refer to section «Factory
settings»).
Mechanical design
The REV23RF has a plastic housing with a large display and easily accessible operat-
ing elements. The controller is removed from its base by sliding it upward. It is thus
possible to replace the two type AA 1.5 V alkaline batteries contained in the compart-
ment at the rear of the controller.
About 3 months before the batteries are exhausted, battery symbol
appears on
the display, but all functions are fully maintained. When replacing the batteries, the
current data will be retained for a maximum of one minute.
Plastic housing with easily accessible operating elements and removable cover. The
unit can be fitted to all commercially available recessed conduit boxes or directly on the
wall. A relay with a potentialfree changeover contact, the connection terminals and the
receiving antenna are integrated in the housing.
Self-learning mode
Exceptions
Periodic pump run
/
Operating mode
Heating / cooling
/
Controller
Battery change
Receiver
REV-R.02/1
… 8 …


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