User Manual

ManualsBrandsSiemens ManualsThermostats (temperature controller with sensor)CE Declaration REA23/101

CE1N2216en

2015

-02-28

Building Technologies

HVAC Products

216

Self-learning room

temperature controller

REA23

5 operating modes, heating / cooling functions and menu selection via rotary knob

• Mains-independent room temperature controller

• Straightforward, self-explanatory menu selection via setting knob

• Self-learning 2-position controller providing PID mode (patented)

• Choice of operating modes:

automatic with maximum 3 heating or cooling periods, continuous comfort

mode, continuous economy mode, frost or overheat protection with one

24-hour operating mode and one heating or cooling period

• In automatic mode, one temperature setpoint can be adjusted for each heating

or cooling period

• Control of cooling equipment

Use

For the control of the room temperature in:

• Apartments, single-family or holiday houses

• Offices, individual rooms, consulting rooms or commercially used spaces

For control of the following pieces of equipment:

• Solenoid valves of instantaneous water heaters

• Solenoid valves of atmospheric gas burners

• Forced draft gas or oil burners

• Circulating pumps in heating systems, zone valves

• Electric direct heating systems or fans of electric storage heaters

• Thermic actuators

• Cooling and refrigeration equipment

Summary of content (12 pages)

PAGE 1
2 Self-learning room temperature controller 216 REA23 5 operating modes, heating / cooling functions and menu selection via rotary knob Mains-independent room temperature controller Straightforward, self-explanatory menu selection via setting knob Self-learning 2-position controller providing PID mode (patented) Choice of operating modes: automatic with maximum 3 heating or cooling periods, continuous comfort mode, continuous economy mode, frost or overheat protection with one 24-hour operating mode and
PAGE 2
Functions • PID mode with self-learning or selectable switching cycle • 2-position control • Automatic mode with 7-day switching program for 24-hour, working day, weekend or 7-day operation with up to 3 heating or cooling periods per day • One temperature setpoint for each heating or cooling period • One 24-hour operating mode with one heating or cooling period • Remote operation • Override button • Sensor calibration and reset function • Frost protection function or overtemperature protection • Limitation
PAGE 3
The rotary knob is only operable within the menus. Move from menu to menu, modify adjustable variables (temperature in increments of 0.2°C and time in hours and minutes) and select functions.
PAGE 4
ESC ESC Temperature OK Current day of week Main menu ESC Factory settings – heating / cooling Submenu T Setpoint comfort mode 19 °C 23 °C Setpoint economy mode 16 °C 29 °C 5 °C 35 °C 10 °C 30 °C Setpoint frost or overtemperature protection Setpoint economy mode remote operation Main menu Time switch OK Submenu Settings Selection of day of week, working day, weekend or week ESC Selection of the number of heating or cooling periods, max.
PAGE 5
/ Periodic pump run Off / On Operating mode heating / cooling Temperature setpoints In the automatic operating modes, temperature setpoints can be individually adjusted for every comfort period and for the continuous operating modes. The temperature setpoint of economy mode is the same in automatic and continuous operation. Protective function In the frost or overtemperature protection mode, the room temperature is constantly monitored.
PAGE 6
Remote operation Using a suitable remote operating device, the controller can be switched to an independently adjustable economy temperature . Changeover is accomplished by the making of a volt-free contact connected to terminals T1 and T2. In that case, symbol will appear on the display. When the contact opens, the operating mode selected last will be resumed.
PAGE 7
Heating engineer level Accessing 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 If the displayed temperature does not correspond to the effective room temperature, the temperature sensor can be recalibrated (recalibration to be made on the heating engineer level). The displayed temperature can be matched to the effective room temperature in increments of 0.
PAGE 8
In exceptional cases, in which the self-learning mode may not be ideal, it is possible to select PID 12, PID 6 or 2-Pt mode: Periodic pump run / PID 12 mode Switching cycle of 12 minutes for normal or slow controlled systems (solid 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).
PAGE 9
Notes Engineering • The room temperature controller should be fitted in the main living area • 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.
PAGE 10
Technical data General unit data Operating voltage DC 3 V 2 x 1.5 V Batteries (alkaline AA) approx. 2 years Battery life Backup for batter change Max. 1 min Switching capacity of relay Voltage AC 24…250 V Current 6 (2.5) A No internal fuse. External preliminary protection with max. C 10 A circuit breaker in the supply lines required under all circumstances. Safety class II to EN 60 730-1 Sensing element NTC 10 kΩ ±1 % at 25 °C 0…50 °C Measuring range Time constant Max.
PAGE 11
Connection diagram 2252A02 Max. 10 A L T1 L2 T2 N1 L1 AC 24...250 V DC 3 V L S1 N M1 Y1 N L L1 L2 M1 N Live AC 24…250 V N.O. contact, AC 24…250 V / 6 (2.5) A N.C. contact, AC 24…250 V / 6 (2.
PAGE 12
Y1 M1 E1 Cooling equipment F1 Limit thermostat F2 Safety limit thermostat M1 Circulating pump N1 Room temperature controller REA23 Y1 3-port valve with manual adjustment Y2 Solenoid valve Y3 Motorized 3-port valve Y4 Motorized 2-port valve 2261S04 N1 T Circulating pump with precontrol via manual mixing valve 30 Dimensions 2216M01 60 56 Ø 78.8 99 140 123 12 + 11.75 83.50 12/12 Building Technologies HVAC Products 2007 – 2015 Siemens Switzerland Ltd.