SIEMENS RDF800 Touch Screen Flush-Mount Standalone Room Thermostats Owner’s Manual

SIEMENS RDF800 Touch Screen Flush-Mount Standalone Room Thermostats

Product Information

The RDF800 series are touch screen, flush-mount room thermostats designed for standalone use in 2-pipe, 2-pipe with electrical heater, and 4-pipe fan coil units, as well as for universal applications with compressors in DX type equipment. The product range includes RDF800, RDF800/NF, and RDF800/VB models. The thermostats are equipped with a fixed set of applications and can be configured using the DIP switches on the inner side of the front panel. The product has stock numbers S55770-T396, S55770-T397, and S55770-T451 for different applications.

Applications

The thermostats support the following applications:

• ON/OFF (heating or cooling)
• 3-position
• B2 heater (heating or cooling)

The output signals and diagrams vary depending on the application selected. The functional descriptions for the thermostat can be referred to the basic documentation P3174.

Type Summary

Product No.| Stock No.| Application| Operating Voltage| Control Outputs 3-pos ON/OFF| Suitable For
---|---|---|---|---|---
RDF800| S55770-T396| Fan coil| AC 230 V| Selectable: ON/OFF or 3-position according to
applications.| Round or square universal conduit boxes EEU
RDF800/NF| S55770-T397| Fan coil| AC 230 V| Selectable: ON/OFF or 3-position according to
applications.| Square conduit boxes
RDF800/VB| S55770-T451| Heat pump| AC 230 V| Selectable: ON/OFF or 3-position according to
applications.| Round or square universal conduit boxes EEU

Product Usage Instructions

To use the RDF800 series thermostats:

1. Select the relevant application using the DIP switches on the inner side of the front panel.
2. Mount the thermostat in a flush-mount box.
3. Connect the thermostat to the fan coil unit or heat pump.
4. Connect the power supply to the thermostat.
5. Configure the thermostat settings (e.g., temperature setpoint) using the touch screen interface.

Note that mounting frames are not included and must be ordered separately as accessories.

For 2-pipe, 2-pipe with electrical heater, and 4-pipe fan coil units
For universal applications
For use with compressors in DX type equipment

FEATURED

• Touch screen
• Large display with backlight
• 2P / PI / P control
• Outputs for ON/OFF or 3-position control
• Outputs for 3-speed or 1-speed fan
• 2 multifunctional inputs for keycard contact, external sensor, etc.
• Independent function for window contact, presence detector (standard presence and hotel presence)
• Operating modes: Comfort, Economy and Protection
• Automatic or manual fan speed control
• Automatic or manual heating/cooling changeover
• Minimum and maximum limitation of room temperature setpoint
• Control depending on the room or the return air temperature
• Adjustable commissioning and control parameters
• AC 230 V operating voltage
• RDF800, RDF800/VB: Mounting on round box, with min 60 mm diameter or recessed square 86 mm box with 60.3 mm fixing centers and min 40 mm depth
• RDF800/NF: Mounting on recessed square 86 mm box with 60.3 mm fixing centers and min 40 mm depth, requires additional mounting frame

Use

Room temperature control (heating or cooling) in individual rooms and zones by means of:

• 2-pipe fan coil units
• 2-pipe fan coil units with electrical heater
• 4-pipe fan coil units
• Chilled /heated ceiling
• Chilled /heated ceiling and electrical heater
• Chilled ceiling and radiator / under floor heating
• Compressors in DX-type equipment
• Compressors in DX-type equipment with electrical heater

The room thermostats are delivered with a fixed set of applications. The relevant application is selected:
Local DIP switch and HMI

Functions

• Room temperature control via built-in temperature sensor or external room temperature/return air temperature sensor
• Changeover between heating and cooling mode (automatically via local sensor or manually)
• Selection of applications via DIP switches
• Selection of operating mode via touchscreen
• 1- or 3-speed fan control (automatically or manually)
• Display of current room temperature or setpoint in °C and/or °F
• Minimum and maximum limitation of room temperature setpoint
• Keylock function: unlock, total lock and setpoint
• 2 multifunctional inputs, freely selectable for:
  • External room temperature or return air temperature sensor
  • Sensor for automatic heating/cooling changeover (RDF…)
  • Window contact
  • Dew point sensor (RDF…)
  • Electric heater enable (RDF…)
  • Fault input
  • Presence detector
• Advanced fan control function, such as: fan kick, fan start delay, and selectable fan operation (enable, disable or depending on heating or cooling mode)
• Purge function together with 2-port valve in a 2-pipe changeover system
• Reminder to clean fan filters (adjust with P62)
• Floor heating temperature limitation
• Reload factory settings for commissioning and control parameters
• Wizard function for easy commissioning via HMI

Note:
The functional descriptions for the thermostat can be referred to the basic documentation P3174.

Applications

The thermostats support the following applications, which can be configured using the DIP switches on the inner side of the thermostat’s front panel.

Applications for fan coil systems

Application and output signal, DIP switches, diagram

V1 Heating or heating/cooling valve actuator

• V2 Cooling valve actuator
• E1 Electric heater

B1 Return air temperature sensor or external room temperature sensor (optional)
B2 Changeover sensor (optional)
M1 3- or 1-speed fan

Applications for Universal systems

Application and output signal, DIP switches, diagram

V1 Heating or heating/cooling valve actuator

V2 Cooling valve actuator
E1 Electric heater

B1 Return air temperature sensor or external room temperature sensor (optional)
B2 Changeover sensor (optional)
D3 Dewpoint sensor

Applications for heat pump systems
Application and output signal, DIP switches, diagram

N1 Thermostat
E1 Electric heater

B1 Return air temperature sensor or external room temperature sensor (optional)
D3 Dewpoint sensor

Type summary

Product no.

| ****

Stock no.

| ****

Application

| Operating voltage| Control outputs| ****

Suitable for

---|---|---|---|---|---
3-pos| ON/OFF
RDF800| S55770-T396| Fan coil,

universal heat pump

| AC 230 V| 1 1)| 2 1)| Round or square conduit boxes EEU
RDF800/NF

| S55770-T397| Fan coil, universal

heat pump

| AC 230 V| 1 1)| 2 1)| Square conduit boxes 2)
RDF800/VB| S55770-T451| Fan coil,

universal heat pump

| AC 230 V| 1 1)| 2 1)| Round or square conduit boxes EEU

1. Selectable: ON/OFF or 3-position according to applications.
2. Mounting frames are not included and must be ordered separately. See “Accessories”

Ordering

• When ordering, indicate the product number, SSN and name.
  For example: RDF800/NF (S55770-T397) room thermostat
  RDF800 (S55770-T396) room thermostat
  RDF800/VB (S55770-T451) room thermostat

• A mounting frame must be ordered for RDF800/NF installation (See “Accessories”).

• Order valve actuators separately.

Equipment combinations

ON/OFF actuators

3-position actuators

Note:

For the maximal number of actuators in parallel, refer to information in the data sheets of the selected actuators and to this list, depending on which value is lower:

• Parallel operation of max 6 SS… actuators (3-pos) is possible.
• Parallel operation of max 10 ON/OFF actuators is possible.

Accessories

Mechanical design

The thermostats consist of the following parts:

• Front panel with electronics, operating elements and built-in room temperature sensor.
• Mounting base with power electronics.
• Additional mounting frame is required for RDF800/NF to complete the installation while RDF800 & RDF800/VB unit comes with its own mounting frame.

The rear of the mounting base contains the screw terminals.
Slide the front panel in the mounting base and snap on.

Operation and settings|
---|---
Display|

if available.

to select the desired H/C control sequence using

+/– if manual H/C changeover (P01 = 2) is selected.

to display alarms if the  icon is displayed; use

icon to select different alarms for viewing.

Touch| for 5 seconds| to select parameter mode (Service/Expert level).

Setting parameters using the local HMI

Wake up the thermostat by touching the screen display.

Entering the Service level

Factory setting for the Service level password is 00 00.

1. Touch and hold down the icon for 5 seconds. Then set the first 2 digit number to 00 using .
2. Touch the last 2 digit number and set it to 00 using .
3. After 3 seconds, P (successful login) or F (fail to login) is displayed.
4. If the login failed, reenter the correct password as per step 1 above. After successful login, the first parameter is displayed as shown in the following example:

Notes:

• Touch any icon to exit.
• Touch to select any parameter and to adjust values.
• When reaching END , touch END to exit.

Entering the Expert level

Follow the same steps for entering the Expert level.
Factory setting for Expert level password is 99 99.

Configuring parameters

After entering the correct password, the screen displays as follows. Touch to advance or return to the desired parameter and use +/- to select the desired available value.

Resetting parameters
The factory setting for the control parameters can be reloaded using P71, by setting the value to ON.

Service level parameters

Parameter| Name| Factory setting| Range| RDF800..| Dependencies
---|---|---|---|---|---
Service level
P01| Control sequence| 2-pipe:

1 = cooling only

4-pipe:

4 = heating and cooling

| 0 = heating only 1 = cooling only

2 = H/C changeover manual 3 = H/C changeover auto

4 = heating and cooling

| |
P02| Operation using room op selector| 1| 1 = Comfort – Protection

2 = Comfort – Economy – Protection

| |
P04| Unit| 0| 0 = °C

1 = °F

| |
P05| Measured value

correction (for built- in/external sensor)

| 0 K| – 5…+5 K| |
P06| Standard display| 0| 0 = room temperature 1 = setpoint| |
P08| Comfort basic setpoint| 21 °C| 5…40 °C| |
P09| Comfort setpoint minimum| 5 °C| 5…40 °C| |
P10| Comfort setpoint maximum| 35 °C| 5…40 °C| |
P11| Economy heating setpoint| 15 °C| OFF, 5…WCoolEco;

WCoolEco = 40 °C max.

| |
P12| Economy cooling setpoint| 30 °C| OFF, WHeatEco…40 °C;

WHeatEco = 5 °C min.

| |
P13| Electric heater when cooling| ON| ON: Enabled OFF: Disabled| |
P14| “Screen lock” function| 0| 0: Unlock

1: Lock

2: Setpoint adjustable

| |
P15| Fan stage in dead zone (Comfort)| 0| 0 = disabled

1 = low speed (Heat and Cool) 2 = low speed (Cooling only)

| |
P16| Buzzer function| ON| ON: Enabled OFF: Disabled| |

Note:
Parameter display depends on the selected application and function.

Expert level parameters with diagnostics and test

Parameter| Name| Factory setting| Range| RDF800..| Dependencies
---|---|---|---|---|---
Expert level
P30| Heat P-band Xp/switching differential| 2 K| 0.5…6 K| |
P31| Cool P-band Xp/switching differential| 1 K| 0.5…6 K| |
P33| Dead zone Comfort mode| 2 K| 0.5…5 K| | Appl.

*)

P34| Setpoint differential| 2 K| 0.5…5 K| | Appl.

*)

1 = room temp ext. sensor/ return air temp (AI)

2 = H/C changeover (AI/DI) 3 = window contact (DI)

4 = dew point sensor (DI)

5 = enable electric heater (DI) 6 = fault input (DI)

10 = presence detector (DI)

|  | P40
P39| Normal position input X1| 0 (NO.)| 0 = NO. (Normally Open) 1 = NC. (Normally Closed)| | P38
P40| Input X2| 1 = ext. sensor| 0 = — (no function)

1 = room temp ext. sensor/ return air temp (AI)

2 = H/C changeover (AI/DI) 3 = window contact (DI)

4 = dew point sensor (DI)

5 = enable electric heater (DI) 6 = fault input (DI)

10 = presence detector (DI)

| | P38
P41| Normal position input X2| 0 (NO.)| 0 = NO. (Normally Open) 1 = NC. (Normally Closed)| | P40
P44| Actuator running time Y1/Y2| 150 s| 20…300 s| | P46
P45| Power of electric heater on Y2 (for adaptive temperature compensation| 0.0 kW| 0.0.. 1.2 kW| |
P46| Output Y1/Y2| ON/OFF (1)| 0 = 3-position 1 = ON/OFF| | Appl.
P48| ON time minimum 2-pos output| 1 min.| 1…20 min| | P46
P49| OFF time minimum 2-pos output| 1 min.| 1…20 min| |
P50| Purge time| OFF| OFF:        Not active

1…5 min: Active with selected duration

| | P38,
P51| Flow temp limit floor heating| OFF| OFF, 10…50 °C| | P38, P40
P52| Fan control| 1| 0 = disabled

1 = enabled

2 = heating only

3 = cooling only

| |
P53| Fan speeds| 3-speed| 1 = 1-speed

2 = 3-speed

| | P52
P54| Fan overrun time| 60 s| 0…360 s| | P52,

Appl.

P55| Fan speed switching point high| 100%| 80…100%| | P52, P53
P56| Fan speed switching point med| 65%| 30..75%| | P52, P53
P57| Fan speed switching point low| 10%| 1…15%| | P52, P53
P58| Fan kick start| ON| ON: Enabled OFF: Disabled| | P52
P59| On time minimum fan| 2 min| 1…6 min| | P52
P60| Periodic fan kick Comfort| OFF| 0…89 min, OFF(90)| | P52
---|---|---|---|---|---
P61| Periodic fan kick Eco| OFF| 0…359 min, OFF(360)| | P52
P62| Service filter| OFF (0)| OFF, 100…9900 h| | P52
P65| Protection heating setpoint| 8 °C| OFF, 5…WCoolProt;

WCoolProt = 40 °C max.

| |
P66| Protection cooling setpoint| OFF| OFF, WHeatProt… 40;

WHeatProt = 5°C min.

| |
P67| Fan start delay| 0 s| 0…360 s| | P52, P46
P69| Temporary Comfort setpoint| OFF| OFF = disabled ON = enabled| |
P71| Restore factory setting| OFF| OFF = disabled ON = reload start| |
P77| Presence Detector Mode| 1: Standard Presence Mode| 1: Standard Presence Mode 2: Hotel Presence Mode| | P38, P40

Appl. = applications

Diagnostics and test
d01| Application number| NONE = (no application) 2P = 2-pipe

2P3P = 2-pipe 3-position

2PEH = 2-pipe with electric heater 4P = 4-pipe

| |
d02| X1 state| 0               = not activated (for DI)

1               = activated (DI)

0…49 °C = current temp. value (for AI) 00      = H/C input shorted

100          = H/C input open

| |
d03| X2 state| 0               = not activated (for DI)

1               = activated (DI)

0…49 °C = current temp. value (for AI) 00      = H/C input shorted

100          = H/C input open

| |
d05| Test mode for checking the Y1/Y2 actuator’s running direction3)| “—” = no signal on outputs Y1 and Y2 OPE = output Y1 forced opening

CLO = output Y2 forced closing

| | P46
d07| Software version| Ux.xx| |

This parameter can only be quit when the setting is back at “—“
Press buttons + and – simultaneously to escape.

Mounting and installation

Mount the room thermostat on a conduit box. Do not mount on a wall in niches or between bookshelves, behind curtains, above or near heat sources, or exposed to direct solar radiation. Mount about 1.5 m above the floor.

Mounting / Dismounting

• Do not apply excessive force on screws! The deformation of the mounting frame may lead to improper connections and operation of the unit.
• Mount the room thermostat on a clean, dry indoor place without direct airflow from a heating/cooling device, and not expose to drips or splashes water.
• In case of limited space in the conduit box, use the mounting spacer ARG70.3 to increase the headroom by 10mm.
• Before removing the front cover, disconnect the power supply.

Wiring

See the User Manual for the installation instructions enclosed with the thermostat.

WARNING
Wire, protect and earth in compliance with local regulations.
Risk of fire and injury due to short-circuits!

• Adapt the line diameters as per local regulations to the rated value of the installed overcurrent protection device.
• The AC 230 V mains supply line must have an external circuit breaker with a rated current of no more than 10 A.
• The maximum current loading (including fan and valves) is 10 A.
• Use only valve actuators rated for AC 230 V.
• Disconnect from supply before removing the unit from its mounting plate.
• Do not connect more than one fan coil unit to the Qs output of the thermostat.
• Do not connect terminal Y1 or Y2 to either L or N.
  • Do not use terminal Y1 or Y2 as AC 230 V power supply.
  • Use cables with min 230 V insulation for both SELV inputs X1-M / X2-M since the conduit box carries AC 230 V mains voltage.
  • Several switches (e.g. window contact) may be connected in parallel for both inputs X1-M / X2-M. However, overall maximum contact sensing current for switch rating must be considered.

Commissioning notes

Before power up
Set DIP switches to select the desired application before power up:

Commissioning method|

DIP switches

|

LCD display

|

Applications

---|---|---|---

Local setup

| | APP 2P| 2-pipe
| APP 2PEH| 2-pipe with electric heater
| APP 4P| 4-pipe
| APP 2P3P| 2-pipe with 3-position output

After DIP switch setting, complete the installation and power up the thermostat.

Notes:
Other DIP switch position will have no effect, i.e. NONE will be shown on LCD display when the unit is powered up if selected . As soon as the application is changed, the thermostat reloads the factory setting for all control parameters.

Wizard

After DIP switches are selected and the thermostat is powered up, the wizard function guides users to configure the basic parameters for normal operation according to the table below.

• Touch to advance/return to any parameter;
• Touch + / – to change value.

If more details are required about parameters, refer to basic documentation P3174.

Reset

To re-load the factory settings for all parameters, set the parameter P71 to ON.
Restart the thermostat after reset. All LCD segments flash, indicating that the reset is correct.
3 seconds later, the thermostat is ready for commissioning by qualified HVAC staff.

Compressor-based application

• When the thermostat is used with a compressor, adjust the minimum output ontime (parameter P48) and off-time (parameter P49) for Y1 / Y2 to avoid damaging the compressor or shortening its life due to frequent switching.

Calibrate sensor

• Recalibrate the temperature sensor if the room temperature displayed on the thermostat does not match the room temperature measured (after min. 1 hour of operation). To do this, change parameter P05.

Setpoint and range limitation

• We recommend to review the setpoints and setpoint ranges (parameters P08…P12) and change them as needed to achieve maximum comfort and save energy.

Notes:
The functional descriptions for the thermostat can be referred to basic documentation (P3174).

Operation

Room temperature out of range
When the room temperature is out of the measuring range (that is, above 49 °C or below 0 °C), – – – will be displayed.
In addition, the heating output is activated if the current setpoint is not set to “OFF”, the thermostat is in heating mode and the temperature is below 0 °C.
For all other cases, no output is activated.
The thermostat resumes Comfort mode after the temperature returns to the measuring range.

The following pages can be displayed by touching the icon, depending on priority: alarm/service reminder, manual H/C changeover, basic Information about room.

Alarm/Service reminder

If any alarm is displayed ( ), touch the icon to check the alarm or service reminder.
If there is more than one alarm, use to browse through all active alarms.

The following table describes the detail information for all alarms and services

Heating/cooling manual changeover

If manual heating/cooling changeover is set using P01 = 2, touch the icon once or twice (depending on the alarms) to select heating or cooling mode.
The selected control sequence will start in three seconds.

Disposal

This symbol or any other national label indicate that the product, its packaging, and, where applicable, any batteries may not be disposed of as domestic waste.
Delete all personal data and dispose of the item(s) at separate collection and recycling facilities in accordance with local and national legislation.
For additional details, refer to www.siemens.com/bt/disposal.

Technical data

Connection terminals

RDF800, RDF800/NF, RDF800/VB

• L, N Operating voltage AC 230 V

• Q1 Control output “Fan speed 1 AC 230 V”

• Q2 Control output “Fan speed 2 AC 230 V”

• Q3 Control output “Fan speed 3 AC 230 V”

• Y1,Y2 Control output “Valve” AC 230 V (N.O., for normally closed valves), output for compressor or output for electrical heater

• X1, X2 Multifunctional input for temperature sensor (such as QAH11.1) or potential-free switch

  • Factory setting: X1 = Window contact
    X2 = External sensor
    (function can be selected via parameter P38 / P40)

• M Measuring neutral for sensor and switch

Connection diagrams

Application

• N1 Room thermostat RDF800…
• M1 1- or 3-speed fan
• V1 Valve actuator, 2- or 3-position
• V1, V2 Valve actuator, 2-position
• E1 Electric heater
• C1, C2 1-stage compressor
• S1, S2 Switch (keycard, window contact, presence detector, etc.)
• B1, B2 Temperature sensor (return air temperature, external room temperature, changeover sensor, etc.)
• X1, X2 Inputs

Example

1. With SUA21/3 2-pipe fan coil application
2. With SUA21/3 4-pipe fan coil application

Dimensions

(mm)

RDF800/NF for square conduit boxes only

ARG800.1 Single Mounting Frame for RDF800/NF

RDF800, RDF800/VB for round conduit boxes

Issued by Siemens Switzerland Ltd
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH-6300 Zug
Tel. +41 58 724 2424
www.siemens.com/buildingtechnologies

© Siemens Switzerland Ltd., 2019
Technical specifications and availability subject to change without notice.

Siemens
Smart Infrastructure

RDF800…
Touch screen flush-mount standalone room thermostats

A6V101123362_en–_e

References

• Smart Information Delivery
• SIOS
• Building technology - Siemens Global

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>