User Manual

Heating engineer level
Access The heating engineer level will be enabled by pressing simultaneously the warmer and
colder buttons and by turning the setting knob counter-clockwise and then clockwise.
Sensor calibration
CAL
If the displayed temperature does not agree with the effective room temperature, the
temperature sensor can be recalibrated (recalibration to be made on the heating engi-
neer menu).
The displayed temperature can be matched to the effective room temperature in incre-
ments of 0.2 °C (max. ±2 °C).
Minimum setpoint limitation of 16 °C prevents undesired heat transfer to neighboring
apartments in buildings with several heating zones. The setting is to be made on the
heating engineer menu.
Limitation of setpoint
Optimum start control
Optimization brings forward the switch-on point of the first heating period such that the
adjusted setpoint will be reached at the desired time.
The setting depends on the type of controlled system, that is, on heat transmission
(type of piping system, radiators), building dynamics (building mass, insulation), and
heat output (boiler capacity, flow temperature).
Optimum start control is switched off at
Example with an actual
room temperature of 18 °C
and a setpoint of 20 °C:
t
T
17
18
19
- 4
- 2
2264D02
16
- 3
1/4h/°C
1/2h/°C
1h/°C
Start
- 2
- 1
- ½
- 1½
- 1
- ½
- ¼
- ¾
P
on
20
°C
T1
- 1
h
(langsame Regelstrecke)
h
(mittlere Regelstrecke)
h
(schnelle Regelstrecke)
TR
x
h
h
h
h
h
h
h
h
h
1. Heizphase
Einschaltoptimierung AUS (keine Wirkung)
1. Heating phase
(slow reacting control loop)
(medium reacting control loop)
(fast reacting control loop)
(no influence)
Optimum start control OFF
T Temperature (°C) TR
x
Actual value of room temperature
t Forward shift of switch-on point (h) P
on
Starting point of optimum start control
Control
The REA23M is a communicating controller providing PID mode.
The control (boiler and REA23M) delivers the necessary flow temperature depending
on the deviation of the adjustable setpoint from the actual value acquired by the built-in
temperature sensor.
The rate of response to the deviation depends on the selected control algorithm:
Permanent-self-learning
operating mode
By default (factory setting) the controller operates in self-learning operating mode,
whereby it automatically adapts to the controlled system (type of building construction,
heating capacity, type of heaters, room size etc.). After a learning period, the controller
self-optimizes the parameters and then operates in accordance with the newly learned
parameters.
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Building Technologies Room temperature controller REA23M CE1N2217en
HVAC Products 17.04.2007