REV24 - Thermostat SIEMENS - Free user manual and instructions

Product type	Programmable room thermostat
Brand	Siemens
Model	REV24
Dimensions (approx.)	85 x 85 x 25 mm
Weight (approx.)	150 g
Power supply	2 AAA batteries (not supplied)
Display	Backlit LCD screen
Setpoint range	3...35 °C or 16...35 °C (depending on DIP setting)
Measurement accuracy	±0.5 °C (adjustable via DIP)
Control modes	Self-adaptive PID, fixed PID (6 or 12), 2-point (on/off)
Time programming	Yes, with start-up optimization (1/4, 1/2, 1 h/°C)
Clock	Quartz or radio-controlled DCF77 (depending on version)
Heating/cooling compatibility	Switchable via DIP 9
Periodic pump exercise	Yes (every 24h, 3 min) - activatable via DIP 6
Maintenance and cleaning	Clean with a soft dry cloth. Do not use abrasive products.
Safety	External protection required: max. C10 A circuit breaker.
Spare parts / Repairability	Standard batteries; other parts not detailed. No user repair.
General information	Software class A, normal pollution degree. Wall mounting, no flat cable.

Frequently Asked Questions - REV24 SIEMENS

How to install the Siemens REV24 thermostat?

The thermostat must be mounted in the main room, away from direct sunlight and heat/cold sources. Fix the wall base (see Fig. B to E), then connect the wires (solid or flat cable with ends). Do not use bare flat cable. Comply with local electrical regulations.

How to configure the DIP switches?

The DIP switches (1 to 10) are located on the back of the device. After changing their position, press the Reset button (see Fig. 8) to validate the new settings. The table in the manual describes each function (calibration, limitation, PID, etc.).

How to calibrate the temperature sensor?

Set DIP switch 1 to ON, press Reset. The display shows 'CAL' and the temperature flashes. Use the + or - keys to adjust by ±5 °C max. Set DIP 1 back to OFF and press Reset to save.

How to change the display language?

On first startup (or after a reset), press a key to stop the language scrolling. Use + or - to select the desired language, then press ^o or move the cursor to confirm.

What to do if the screen remains blank?

Check that the batteries are correctly inserted and working. Remove the black insulating strip (Fig. F) if still in place. If the screen remains blank, replace the batteries.

How to reset the thermostat to factory settings?

For a complete reset (custom + installer settings), hold down the Reset, + and - buttons simultaneously for 5 seconds. All settings return to default values. Note: this also erases the time and date.

How to activate cooling mode instead of heating?

Set DIP switch 9 to ON (up position) and press Reset. The snowflake icon (cooling) appears. To return to heating, set DIP 9 back to OFF and press Reset.

What is the difference between PID 6, PID 12 and 2-point?

PID 6 (DIP 4 ON, 5 OFF): fast loop for large variations. PID 12 (DIP 4 OFF, 5 ON): normal loop. 2-point (DIP 4 OFF, 5 OFF): on/off regulation with 0.5 °C differential, for slow systems.

How to set the time via radio clock?

For models with DCF77 receiver (REV..DC), set DIP switch 10 to OFF to use the radio signal. The time synchronizes automatically. If the signal is not received, use quartz mode (DIP 10 ON) and set manually.

What to do if the thermostat does not switch after setpoint change?

Check that the mode (heating/cooling) matches the setpoint: in heating, setpoint must be above room temperature; in cooling, below. Also check the wiring and the actuator. The relay switches within 1 minute maximum.

USER MANUAL REV24 SIEMENS

Two-panel image showing a hand inserting a component into an electrical socket, with no visible text or symbols.

Close-up of a hand using a screwdriver to adjust or install a white electronic device panel (no visible text or symbols)

Two views of a battery pack being held, showing internal components and a close-up of the exterior (no text or symbols visible)

Mounting notes REV24..

1 Placement of unit

• The REV24.. should be mounted in the main living room (for wall mounting, refer to Figs. B through E)
• The REV24.. must be located such that it can acquire the room temperature as accurately as possible, without getting affected by direct solar radiation or other heat or refrigeration sources

2 Mounting

• Refer to Figs. A through E

3 Checking the wiring

For electrical connections, refer to "Connection diagram".

Note: Do not use stranded wires, only solid wires or stranded wires with ferrules!

4 Notes

• The local regulations for electrical installations must be complied with
• If the reference room is equipped with thermostatic radiator valves, they must be set to their fully open position
• External preliminary protection with max. C 10 A circuit breaker is required in all cases

Commissioning

1 Switching on the REV24..

- Remove the black battery transit tab (Fig. F); as soon as the tab is removed, the unit is ready to operate (also refer to operating instructions)

2 Selecting the language

- When starting up, the display shows the type of controller at top left and "THANK YOU ..." in all available languages on the text line

- Press one of the buttons to stop the running display. The choice of languages starts with "ENGLISH" (factory setting). Press or - until the language you require appears. Press or move the slider to confirm the selected language (also refer to Fig. G)

Configuration and function check REV24..

1 Configuration

1.1 DIP switches

△ON / ▽OFF

1

2

3

4

5

6

7

8

9

10

See

See 1.1.1

Sensor calibration on

△

△

Periodic pump run on

1.1.5

Sensor calibration off

▽

▽

Periodic pump run off

1.1.2

Setpoint limitation 16...35 °C

△

△

△

Optimum start control: 1 h/°C

1.1.6

Setpoint limitation 3...35 °C

▽

△

▽

Optimum start control: 1⁄4 h/°C

1.1.3

Temperature display °F

△

▽

△

Optimum start control: 1⁄2 h/°C

Temperature display °C

▽

▽

▽

Optimum start control: Off

1.1.4

PID self-learning

△

△

△

(Cooling on)

1.1.7

PID 6

△

▽

▽

(Heating on)

PID12

▽

△

△

Quartz

1.1.8

2-Point

▽

▽

▽

Radio clock

1.1.9

DIP switch resetWhen changing one or several DIP switch positions, a DIP switch reset must be made by pressing the DIP switch reset button (also refer to Fig. 8). Otherwise, the previous settings will be maintained!

1.1.9

Factory setting: All DIP switches ▽ OFF

1.1.1 Sensor calibration: DIP switch 1

Set the DIP switch to ON and press the DIP switch reset button: The display shows CAL. The room temperature currently acquired blinks. Press + or to make a recalibration of max. ± 5 °C. To save the entry, set the DIP switch to OFF and press the DIP switch reset button (also refer to Fig. ①).

1.1.2 Setpoint limitation: DIP switch 2

DIP switch ON: Setpoint limitation 16...35 °C

DIP switch OFF: Setpoint limitation 3...35 °C (factory setting)

Save the entry by pressing the DIP switch reset button.

1.1.3 Temperature display in °C or °F: DIP switch 3

DIP switch ON: Temperature display in °F

DIP switch OFF: Temperature display in °C (factory setting)

Save the entry by pressing the DIP switch reset button

(also refer to Fig. ②).

1.1.4 Control action: DIP switches 4 and 5

DIP switch 4 ON and 5 ON: PID self-learning

Adaptive control for all types of application.

DIP switch 4 ON and 5 OFF: PID 6

For fast controlled systems, applications at locations with great temperature variations.

DIP switch 4 OFF and 5 ON: PID 12

For normal controlled systems, applications at locations with normal temperature variations.

DIP switch 4 OFF and 5 OFF: 2-Point

For difficult controlled systems, 2-position controller with a switching differential of 0.5 ^ (factory setting).

Save the entry by pressing the DIP switch reset button

(also refer to Fig. ③).

1.1.5 Periodic pump run: DIP switch 6

Can only be used when circulating pump or valve is controlled! This function protects the pump or valve against seizing during longer off periods. Periodic pump run is activated for 3 minutes every 24

hours at 12:00 (display showing symbol ▲).

DIP switch ON: Periodic pump run on (also refer to Fig.

DIP switch OFF: Periodic pump run off (factory setting)

Save the entry by pressing the DIP switch reset button.

1.1.6 Optimum start control: DIP switches 7 and 8

Optimum start control shifts switch on point P.1 such that the adjusted setpoint will be reached at the required point in time. The setting depends on the type of controlled system, that is, on heat transmission (piping network, radiators), building dynamics (building mass, insulation) and heat output (boiler output, flow temperature)

(also refer to graph in Fig.⑤ / 1.1.6).

DIP switch 7 ON and 8 ON:

1 h/°C For slow controlled systems

DIP switch 7 ON and 8 OFF:

1/4 h/ ^ C For fast controlled systems

DIP switch 7 OFF and 8 ON:

1/2 h/ ^ C For medium controlled systems

DIP switch 7 OFF and 8 OFF:

OFF Off, no impact (factory setting)

Save the entry by pressing the DIP switch reset button.

Legend to graph in Fig. . ⑤:

t Temperature (°C)

t Forward shift of switch on point (h)

TRx Actual value of room temperature

Pon Start point for optimum start control

1.1.7 Heating or cooling mode: DIP switch 9

DIP switch 9 ON:

DIP switch 9 OFF:

Heating mode (factory setting)

Save the entry by pressing the DIP switch reset button

(also refer to Fig. ⑥)

1.1.8 Radio clock: DIP switch 10

Can only be used with REV..DC (with integrated DCF77 receiver for time signal from Frankfurt)!

DIP switch ON:

Clock runs on built-in quartz

DIP switch OFF:

Time signal DCF77 from Frankfurt

Save the entry by pressing the DIP switch reset button

(also refer to Fig. ⑦).

1.1.9 DIP switch reset (Fig.)

When changing one or several DIP switch positions, press the DIP switch reset button to make a DIP switch reset.

Otherwise, the previous settings will be maintained!

(Also refer to Fig. ⑧)

2 Accessing the expert level

Move the selector slider to the RUN position and press simultaneously + and - for 3 seconds, then release the buttons and, within 3 seconds, press simultaneously and for 3 seconds, release and keep depressed for another 3 seconds. This enables you to access the expert level for making the settings on that level Install on display (also refer to Fig. G).

Starting with code 00, the display shows the choice of languages. Navigation on the expert level is made possible with + and -. Confirm the settings by pressing [e:1].

The expert level is quit by pressing the operating mode selection button ○.

Code list

Function block	Code	Name	Factory setting	Your setting
Basic settings	00	Language	English
	01	Sensor calibration	off
	02	Switching differential 2-point	0.5 °C
LCD settings	10	Illumination time	10 seconds
	11	Background brightness	0
	12	Contrast	0
Clock settings	30	Time zoneDeviation from time signal received from Frankfurt (Central European Time CET)(refer to Note 1)	0 hours
	31	Start of summer time (refer to Note 2)	March 31 (31-03)
	32	End of summer time (refer to Note 3)	October 31 (31-10)

Note 1:

If the radio clock is not active or not present, this setting has no impact.

With the radio clock active, the time signal received from Frankfurt is shifted by the value set under code 30 (time zone).

Note 2:

If the radio clock is not active or not present, the time change always takes place at 02:00 on the Sunday before the set date.

With the radio clock active, the time change is shifted by the value set under code 30 (time zone).

Note 3:

If the radio clock is not active or not present, the time change always takes place at 03:00 on the Sunday before the set date.

With the radio clock active, the time change is shifted by the value set under code 30 (time zone).

3 Function check

a) Check the display. If there is no display, check the batteries

b) "Continuously Comfort mode" read the temperature displayed

c) REV.. in heating mode: Set the temperature setpoint to a level above the displayed room temperature (see operating instructions) REV.. in cooling mode: Set the temperature setpoint to a level below the displayed room temperature (see operating instructions)

d) The relay and thus the actuating device must respond within 1 minute. Symbol ▲ appears on the display. If not:

- Check actuating device and wiring

- In heating mode, the room temperature is possibly higher than the adjusted temperature setpoint, in cooling mode possibly lower

e) Set temperature setpoint of "Continuously Comfort mode" to the required level

f) Select the required operating mode

4 Reset

User-defined settings:

Press simultaneously ○, + and - for 3 seconds:

All temperature and time settings of the slider positions are reset to their default values (refer to section "Factory settings" in the operating instructions). The settings made on the expert level will remain unchanged.

The clock starts at 12:00, the date on 01-01-08

(01 - January - 2008). During the reset time, all sectors of the display are illuminated and can thus be checked.

All user-defined settings plus those made on the expert level:

Press simultaneously the DIP switch reset button, + and - for 5 seconds:

After this reset, all factory settings will be reloaded. This applies to both the slider settings and the settings made on the expert level.

Notes

- The controller is classified as a device of software class A and designed for use in environments with normal degree of pollution

Commutateurs DIP 4 ON et 5 ON: PID self-learning

DIP switch 3 OFF: Temperatura in °C

Interruptor PLD 9 ON:

- Consulte as Figs. A até E

Interruptor DIP 4 ON e 5 OFF: PID 6

Interruptor DIP 7 ON e 8 ON:

1 h/°C Para sistemas de controlo lento

Interruptor DIP 7 ON e 8 OFF:

14 h/°C Para sistemas de controlo rápido

Interruptor DIP 7 OFF e 8 ON:

Interruptor DIP 7 OFF e 8 OFF:

Interruptor DIP 9 ON: