User Manual

In exceptional cases, in which the permanent-self-learning mode may not be ideal,
PID 12, PID 6 or 2-Pt mode can be selected:
Exceptions
PID 12 mode For normal or slow controlled systems (massive building structures,
large spaces, cast-iron radiators, oil burners).
PID 6 mode For fast controlled systems (light building structures, small spaces,
plate radiators or convectors, gas burners).
2-Pt mode Simple 2-position control with a switching differential of 0.5 °C
(±0.25 °C) for very difficult controlled systems with considerable
outside temperature variations.
User-defined data:
Press the button behind the pin opening for at least 1 second: This resets the user
specific settings and the “Permanent-self-learning operating mode” as well as display of
flow temperature, outside temperature and DHW setpoint to their default values (the
heating engineer settings will not be changed). The clock starts at 12:00. During the
reset time, all sections of the display light up, enabling them to be checked.
Reset functions
All user-defined data plus heating engineer settings:
Press the button behind the pin opening together with the warmer and colder buttons
for at least 1 second.
After this reset, all
factory settings will be reloaded (also refer to section “Factory set-
tings“).
Without inserted batteries, reset functions correctly for a maximum of 15 seconds only
after removing REA23M from its base.
Caution
Mechanical design
Controller
The REA23M has a plastic housing with a large display and easily accessible operating
elements. The controller is removed from its base by sliding it upward. It is thus possi-
ble to replace the two 1.5 V alkaline batteries type
AA in the compartment at the rear of
the unit.
About 3 months before the batteries are exhausted, battery symbol
appears on
the display, but all functions will be fully maintained. When changing the batteries, the
current data will be retained for a maximum of 1 minute.
Battery change
Base
The base can be fitted to most types of commercially available recessed conduit boxes
or directly on the wall for wiring. The base only houses the terminals for the electrical
connection between the controller and the connected devices. The entire electronics
(including the relay with a potential free changeover contact) are accommodated in the
controller.
Notes
Engineering
• The room temperature controller should be located in the main living room
• The place of installation should be chosen such that the sensor can capture the room
temperature as accurately as possible, without being affected by direct solar radiation
or other heating or cooling sources
• Mounting height is approximately 1.5 m above the floor
• The controller can be fitted to most commercially available recessed conduit boxes or
directly on the wall
• Above the unit, there must be sufficient clearance for removing the controller from its
base and for replacing it
10/14
Building Technologies Room temperature controller REA23M CE1N2217en
HVAC Products 17.04.2007