SIEMENS RDF660MB Flush Mount Room Thermostat Instruction Manual
Operating Instructions
RDF660MB..
Protection mode
Comfort mode
Economy mode **
Condensation in the room *
Cooling demand/mode
Heating demand/mode
Key lock
The key symbol
indicates buttons are locked.
Electrical heater active
Key lock can be configured via parameter P14.
Measured room temperature,
setpoints and parameters
Reminder to clean filters and for external faults
Automatic fan
Low fan speed
Medium fan speed
High fan speed
Current time of day or
additional user
information
FIL *This message reminds user to clean HVAC equipment filters.
Recalibrating the sensor
Actual room
temperature
Outdoor temperature
After installation for at least one hour, the displayed room temperature
can be recalibrated via parameter P05.
Commissioning
Buttons are locked
Fault indicator *
User can adjust several different control parameters to adapt the
thermostat to your system and optimize control performance. User
can do this during operation either via the buttons on the thermostat
or using a commissioning tool via Modbus.
*
Needs to be configured by your HVAC installer
** Needs to be enabled via parameter P02
Change room temperature setpoint
Press + or – buttons to increase or decrease the current room temperature setpoint for Comfort
mode. The thermostat changes to Comfort
The setting range is 5...35 °C, unless limited by parameters P09 and P10.
.
Baud rate and parity
The Baud rate can be adjusted to 9600 bps, 19200 bps (factory
setting), 38400 bps or 57600 bps. The Parity can be set to none, odd or
even (factory setting). Your HVAC installer can set them through
additional parameters.
Adjust fan speed/fan mode
Press the button to adjust the fan mode and fan speed.
In Auto mode
, the thermostat automatically selects the fan speed based on setpoint and actual
room temperature.
In manual mode, the fan always runs at the speed that user selects:
Low fan speed
Important: Once making any changes on the baud rate or parity,
user must reset the power before the changes take effect.
Medium fan speed
High fan speed
Control parameters
Proceed as follows to change the most important control parameters
Change thermostat operating mode
1. Press the – and + buttons simultaneously for more than 6
seconds.
Press operating mode button
to change the operating mode display.
Release, and within 2 seconds, press + again for more than 3
seconds. "P01" is displayed.
2. Repeatedly press the + or – button to select the required
parameter.
In Comfort mode , the thermostat maintains the room temperature at the setpoint which can be
readjusted using the + and – buttons.
In Economy mode , the room temperature is maintained at a lower or higher fixed setpoint (factory-
set: 15 °C, 30 °C) to save energy. Adjust parameters P11 and P12 to change the preselected
setpoints. The availability of Economy mode depends on parameter P02 or via an external signal
(switch or Modbus command) such as keycard or presence detector.
In Protection mode , the thermostat stops operating. However, it will operate if the room
temperature is below 8 °C (heating application) against frost (P65) and the value is adjustable.
In Protection mode, press any button to activate the screen, then press the mode button to change to
another operating mode.
3. Press + and – simultaneously once to enter EDIT mode. Then press
+ or – button to change the value of the selected parameter and
press + and – simultaneously to save the change.
4. Repeat steps 2 to 3 to display and change additional parameters.
5. Press + or – until “End” is displayed, and then press + and –
simultaneously to exit parameter entry mode.
Important: User can set Protection setpoints to OFF; the thermostat then is inactive, i.e. no
protective heating or cooling function. Risk of frost!
Change from heating to cooling mode
Changeover between cooling and heating is either automatic using a heating/cooling changeover sensor or a remote changeover switch or via instruction from the
central management station via Modbus, or manual by pressing operating mode button
.
No changeover is possible if the thermostat is configured for cooling only or heating only (see parameter P01).
Meaning of cooling and heating symbols when displaying on LCD:
For automatic changeover or heating only/cooling only:
-
-
Heating valve is open
Cooling valve is open
For manual changeover only:
-
-
Thermostat is in heating mode
Thermostat is in cooling mode
Parameter Description
Factory setting
Setting range
2-pipe = 1 [selection: 0…3] 0 = Heating only; 1 = Cooling only; 2 = H/C changeover manual
P01
Control sequence
4-pipe = 4 [selection: 2, 4]
3 = H/C Changeover auto; 4 = Heating and cooling
3 = Comfort – Protection; 4 = Comfort - Economy - Protection
0 = °C (Celsius); 1 = °F (Fahrenheit)
P02
P04
Mode selection by user via operating mode button
Unit
3
0
Measured value correction (for built-in/external
sensor)
-5 K...5 K
P05
P06
P07
0
0
0
Standard display
0 = Room temperature; 1 = Setpoint; 2 = Temperature value via bus
0 = No display; 1 = Room temperature °C or °F; 2 = Outside temperature (via bus)
3 = Time of day (12 h) via bus; 4 = Time of day (24 h) via bus
Additional display information
21 °C
5 °C
35 °C
15 °C
30 °C
1
5...40 °C
P08
P09
P10
P11
P12
Comfort basic setpoint
5...40 °C
Minimum Comfort setpoint
5...40 °C
Maximum Comfort setpoint
Economy heating setpoint (WheatEco)
Economy cooling setpoint (WcoolEco)
OFF, 5 °C…WcoolEco
OFF, WheatEco…40 °C
0 = Disabled; 1 = Enabled
P13 *** Electrical heater in cooling mode
0 = Unlock; 1 = Lock (all lock); 2 = Setpoint adjustable; 3 = Setpoint lock; 4 = Fan lock;
5 = Operating mode lock
P14 Key lock
0
All temperature settings are in increments of 0.5 °C.
***Parameter P13 is only displayed for application "2-pipe with electric heater".
Issued by
© Siemens Switzerland Ltd, 2020
Technical specifications and availability subject to change without notice.
Siemens Switzerland Ltd
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH-6300 Zug
Tel. +41 58 724 2424
2/2
A6V12060783_en--_c
A5W00123793A_AC
2022-11-24
Siemens Smart Infrastructure
| General | Details |
|---|---|
| Name | SIEMENS RDF660MB Flush Mount Room Thermostat Instruction Manual |
| Make | SIEMENS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 1.04 MB |
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