Siemens RDF880KN/NF User manual

A6V11282546_en--_a
2018-04-19 Building Technologies
s
A6V
11282546
RDF880KN/NF
Touch Screen Flush-mount Room
Thermostats with KNX
Communications
Under Floor Heating (UFH) control application
with an additional HMI for
Variable Refrigerant Flow (VRF) commands via KNX S-mode
·Large display, touch screen with backlight
·VRF HMI: adjust setpoint, fan mode, fan speed and operating modes
·2-position (ON/OFF) temperature control with potential free output for UFH
via build-in / external temperature sensor
·Display room temperature value (°C) and relative humidity value (% r.h.)
via a build-in temperature and humidity sensor
·One setpoint adjustment for both VRF HMI and UFH controls
·Fan auto and manual speed setting from 1 up to 7 speed
·Operating mode selection for VRF: AUTO, COOL, HEAT, FAN and DRY
·Operating mode selection for UFH: Comfort and Protection
·Economy operating mode for both VRF and UFH to save energy
·2 multifunctional inputs (see details in functional descriptions)
·Adjustable control parameters for alternative settings
·KNX bus communications via S-mode and LTE-mode
·Integration to VRF system via S-mode and third party gateways
·Commissioning via ETS download
·Wizard function for fast commissioning via HMI
·Alarm / Error information
·AC 230 V operating voltage
·RDF880KN/NF: Mounting on recessed square 86 mm box with 60.3 mm
fixing centers and min 40 mm depth, requires additional mounting frame
to complete installation

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Building Technologies Touch Screen Flush-mount Room Thermostats with KNX Communications 2018-04-19
Use
More than just room temperature control via a connected VRF system or a UFH
system or both:
Typical applications:
·Residential apartments
·Small office or commercial buildings
·Schools / Universities
For the VRF HMI, the unit interfaces to VRF systems via a third party gateway for:
·User application selection: - UFH only or VRF only or both
·Setpoint adjustment: - maximum / minimum limitations
·Fan speed adjustment: - auto / manual speeds (up to 7 speeds)
·Operating mode selection: - AUTO, HEAT, COOL, FAN and DRY
·Economy mode: - energy saving
·Fan swing adjustment (optional): - auto swing or fix at any position (10)
·Delay off timer (optional): - allow up to 23 hours operations before off
For the control of the following pieces of heating equipment:
·Floor Heating
·Thermal valves or zone valves
·Gas or oil boilers
·Fans
·Pumps
The configuration can be done locally or remotely via one of the following:
·Local HMI & DIP switches
·Synco ACS (UFH only)
·ETS4/5 (binding S-mode objects for VRF & UFH)
Functions
·Room temperature control via a built-in or external room temperature sensor
·Calibrations for both internal temperature and relative humidity sensors
·Display of current room temperature or setpoint in °C
·Minimum and maximum limitation of room temperature setpoint
·Fan speed adjustment, auto, manual (up to 7 speeds)
·Selection of VRF operating mode:
àAUTO, HEAT, COOL, FAN and DRY
·Selection of UFH operating mode:
àComfort and Protection
·Energy saving (Economy mode) for both VRF and UFH
·Key lock function: unlock, total lock and setpoint lock
·2 multifunctional inputs, freely selectable for:
-External room temperature or return air temperature sensor
-Window contact
-Fault input
-Monitor input for temperature sensor or switch state
·Floor heating temperature limitation
·Display of outdoor temperature and time scheduling via KNX bus
·Reload factory settings for commissioning and control parameters
Optional: enable / disable via parameters
·Relative humidity display via a built-in humidity sensor
·Fan swing selection: auto swing or fix at any position (up to 10)
·Delay off timer: up to 23 hour operations
·Chinese text display for 4 navigation icons

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Building Technologies Touch Screen Flush-mount Room Thermostats with KNX Communications 2018-04-19
Applications
RDF880KN/NF is designed to provide easy-to-understand HMI for any existing
VRF system installed in residential homes and apartments where Under Floor
Heating (UFH) room thermostat may be required at the same time.
RDF880KN/NF has three kinds of applications including VRF HMI or UFH or both.
Applications are selectable via DIP switches.
Download via ETS
(All in OFF positions)
UFH only
VRF HMI only
VRF HMI and UFH
For selection under application mode via HMI, refer to user manual A6V11272225
for selecting applications.
UFH Application
For the UFH application, RDF880KN/NF provides an ON/OFF output to control
water valve to maintain a comfort level of room temperature.
Room thermostat to control the valve
for the floor heating application

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Building Technologies Touch Screen Flush-mount Room Thermostats with KNX Communications 2018-04-19
VRF Application (HMI only)
For the VRF application, RDF880KN/NF provides an easy-to-understand HMI for
adjusting frequent used operations of the VRF systems such as adjustments of
temperature setpoint, fan speed, VRF operating mode, etc.
Since all VRF brands have their own communication protocols
between the remote control unit and VRF equipments (e.g. indoor
or outdoor units), RDF880KN/NF can send all standard KNX
commands (S-mode KNX objects) via the KNX bus to a third party
KNX/VRF gateway (as a protocol converter) and then communicate
indirectly with the VRF indoor or outdoor units. Effectively, it works
similarly like a remote control unit of a VRF system.
Note that RDF880KN/NF cannot replace all functions of the remote
control unit of the VRF system but the following typical VRF
functions:
·Temperature - provide current room temperature value
- adjust temperature setpoint
·Fan - select auto or manual speed up to 7 levels
- select auto swing or fixed swing positions
·Operation - set to AUTO, HEAT, COOL, FAN and DRY
Typical VRF Systems
(Provided by 3rd Party, non-Siemens products)
Integration
via KNX Bus S-mode

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Building Technologies Touch Screen Flush-mount Room Thermostats with KNX Communications 2018-04-19
Other Heating Applications
RDF880KN/NF is not limited to UFH applications but also for the following heating
applications such as radiators, wall hung boilers, etc.
Room thermostat to control the valve of
the radiator application
Room thermostat with direct control of a
gas-fired wall-hung boiler
Room thermostat with direct control of a
gas-fired floor-standing boiler
Room thermostat with direct control of a
heat pump (pre-controlled by manual
mixing valve)
Room thermostat with direct control of
hydronic floor heating system
F1 Thermal reset limit thermostat
F2 Safety limit thermostat
M1 Circulating pump
N1 Room thermostat
V1 2-port valve
V2 Mixing 3-port valve with
manual adjustment
V3 Magnetic valve

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Building Technologies Touch Screen Flush-mount Room Thermostats with KNX Communications 2018-04-19
Type summary
Product no. Stock no. Operating
voltage Control outputs Suitable for
3-pos ON/OFF DC 0..10 V
RDF880KN/NF
2)
S55770-T398 AC 230 V -- 11) -- Square conduit box
2)
1) ON/OFF output with potential free input from AC 24…230 V
2) Mounting frames are not included and must be ordered separately. (See
“Accessories”)
Ordering
·When ordering, indicate product number, SSN and name.
e.g. RDF880KN/NF (S55770-T398) heating thermostat with VRF HMI
·A mounting frame or multi-frame must be ordered for RDF880KN/NF installation.
(See “Accessories”)
·Order valve actuators separately.
Equipment combinations
Type of unit Product no. Data sheet
Cable temperature sensor or
changeover sensor
cable length 2.5 m
NTC (3 kWat 25 °C)
QAH11.1 d) 1840
Room temperature sensor
NTC (3 kWat 25 °C) QAA32 1747
Cable temperature sensor,
cable length 4 m
NTC (3 kWat 25 °C)
QAP1030/UFH 1854
Electromotoric ON/OFF actuator SFA21... 4863
Electromotoric ON/OFF valve and
actuator a) MVI…/MXI… A6V11251892
Zone valve actuators a) SUA… 4832
Thermal actuator b) STA23... 4884
Thermal actuator c) STP23... 4884
Damper actuator GDB.. 4634
Damper actuator GSD.. 4603
Damper actuator GQD.. 4604
Rotary damper actuator GXD.. 4622
a) only available in AP, UAE, SA and IN
b) for radiator valve
c) for small valves 2.5 mm
ON/OFF actuators

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Building Technologies Touch Screen Flush-mount Room Thermostats with KNX Communications 2018-04-19
d) both QAH11.1 and QAP1030/UFH are for floor heating applications, such as
temperature limitation controls. QAP1030/UFH has a special head and 4 m long
that is more suitable for such application.
Refer to data sheets of the actuators for the maximum number of parallel
operation.
Accessories
Designation Product no. / SSN Data sheet
Single mounting frame
*)
, Ivory White ARG800.1 /
S55770-T370 --
KNX Power supply 160 mA (Siemens BT LV) 5WG1 125-1AB02 --
KNX Power supply 320 mA (Siemens BT LV) 5WG1 125-1AB12 --
KNX Power supply 640 mA (Siemens BT LV) 5WG1 125-1AB22 --
*) See the dimensions of mounting frame on page 24.
Note:

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Building Technologies Touch Screen Flush-mount Room Thermostats with KNX Communications 2018-04-19
Mechanical design
The thermostats consist of the following parts:
·Front panel with electronics, operating elements and built-in room temperature
and relative humidity sensors.
·Mounting base with power electronics.
·Mounting frame is an additional part to complete the installation for
RDF880KN/NF, e.g. single or multi-frames.
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
Status symbols:
Economy active Alarm / Service active
Delay timer active Key lock active
Floor heat active Fan active
VRF operating modes
Selection symbols:
Indoor temperature VRF fan speed
Outdoor temperature VRF fan swing
Relative humidity
Operational icons:
Increment, decrement OR selection
ƒ „ Selection OR move to next items
Temperature, relative humidity OR
parameter values, etc.
Parameters OR password, etc.
Setpoint mode (temperature only)
Fan mode OR fan speed mode
VRF & floor heat operating modes
More info & settings
STATUS &
OPERATIONof the
room thermostat
INFORMATION
1st line: temperature or
humidity, values of
parameters
2nd line: parameters and
alarms
Both sides: STATUS
ADJUSTMENTfor temperature setpoint, fan speed, operating modes of VRF and
Floor Heating, more INFO and settings (for example, Alarm, Delay Off Timer, etc.)
SELECTIONof
available information and
VRF fan modes

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Engineering notes
See the "Reference documentation", page 21, for information on how to engineer
the KNX bus (topology, bus repeaters, etc.) and how to select and dimension
connecting cables for supply voltage and field devices.
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 exposed to drips or water.
·Before removing the front cover, disconnect the power supply.
Wiring See the User Manual for the installation instructions enclosed with the thermostat.
·Comply with local regulations to wire, protection and earth the thermostat.
·The device has no internal fuse for supply lines to fan and actuators. To avoid
risk of fire and injury due to short-circuits, the AC 230 V mains supply line must
have a circuit breaker with a rated current of no more than 10 A.
·The wiring cross section used for power supply (L, N) and 230 V outputs
(Qxx - N) must be adapted to the preceding overload protection elements (max
10 A) under all circumstances. Comply under all circumstances with local
regulations.
·Properly size the cables to the thermostat and valve actuators for
AC 230 V mains voltage.
·Cables of SELV inputs X1-M / X2-M: Use cables with min 230 V insulation, as
the conduit box carries AC 230 V mains voltage.
·Inputs X1-M or X2-M of different units (e.g. window contact) may be connected
in parallel with an external switch. Consider overall maximum contact sensing
current for switch rating.
·KNX communication cables (input CE+ / CE-): Use cables with min 230 V
insulation, as the conduit box carries AC 230 V mains voltage.
·When a KNX bus power supply is connected on the line with communicating
thermostats and Synco controllers, the internal KNX power supply of the
Synco controllers must be switched off.
·No cables provided with a metal shield.
·Disconnect from supply before opening the cover.

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Building Technologies Touch Screen Flush-mount Room Thermostats with KNX Communications 2018-04-19
Commissioning notes
Select DIP switch setting is required for RDF880KN... thermostats.
COMMISSIONING: Download via ETS
1. DIP switch setting
All in OFF positions
2. First power up
Press to turn ON
3. Touch & hold this
icon > 5 s to enter
Programming mode
4. Ready for downloading
address & application
Touch “ON“ to exit
COMMISSIONING: Local via DIP Switches
1. Set application via
DIP switches DIP switch
positions APPLICATION
1 2
ON ON VRF+FLOOR HEAT
OFF ON VRF ONLY
ON OFF FLOOR HEAT ONLY
2. Configure basic
control parameters
via Wizard
See Configure Parameters
via Wizard in Wizard function.
After power up, the wizard function guides users to configure the basic parameters
for normal operation according to the table below.
Touch ƒ/ „to advance / return to any parameter;
Touch +/ -to select any desired available values.
Before power up
Wizard function