Belimo WRF04 User manual

1
V1.1 02.2012 · Subject to modification
Room Operating Panel WRF04
Types available
Type code Type Description
Product overview
The room operating panel is designed for temperature detection and
integrated manual control of HVAC applications (change set point,
occupancy, fan speed).
The operating functions can be used very flexibly depending on the room
requirements. Thus, different types with various numbers of function keys
are available.
The universal room operating panel has a wiring clamp, where the sensor
or the operating element (potentiometer, rotary switch, pushbutton, ...) is
wired up.
The device disposes of the following features
- Different function keys depending on the device type, e.g. for set point
or occupancy or fan speed
- LED for status indication
- Integrated temperature sensor
- For wall mounting, mounting on standard installation box is possible
EXT-TN-1070408 WRF04 Ni1000 Ni1000
EXT-TN-1066579 WRF04 PT1000 PT1000
EXT-TN-1070415 WRF04 NTC10k NTC10k
EXT-TN-1072600 WRF04 NTC10kPRE NTC10k Precon
EXT-TN-1072617 WRF04 NTC10kPRE11k NTC10k Precon 11k
EXT-TN-1066586 WRF04 NTC20k NTC20k
EXT-TN-1070712 WRF04 TRA MultiRange 4...20mA
EXT-TN-1070736 WRF04 TRA3 4...20mA
EXT-TN-1070750 WRF04 TRV MultiRange 0...10V
EXT-TN-1070774 WRF04 TRV3 0...10V
EXT-TN-1072655 WRF04P PT1000 PT1000, 1k Potentiometer
EXT-TN-1072631 WRF04P NTC10k NTC10k, 1k Potentiometer
EXT-TN-1072648 WRF04P NTC10kPRE NTC10k Precon, 1k Potentiometer
EXT-TN-1070484 WRF04P Ni1000 Ni1000, 10k Potentiometer
EXT-TN-1070538 WRF04P PT1000 PT1000, 10k Potentiometer
EXT-TN-1070507 WRF04P NTC20k NTC20k, 10k Potentiometer
EXT-TN-1070569 WRF04PS Ni1000 Ni1000, 10k Potentiometer, fan speed
EXT-TN-1070613 WRF04PS PT1000 PT1000, 10k Potentiometer, fan speed
EXT-TN-1070583 WRF04PS NTC20k NTC20k, 10k Potentiometer, fan speed
EXT-TN-1072686 WRF04T PT1000 PT1000, pushbutton
EXT-TN-1072662 WRF04T NTC10k NTC10k, pushbutton
EXT-TN-1072679 WRF04T NTC10kPRE NTC10k Precon, pushbutton
EXT-TN-1072716 WRF04TD PT1000 PT1000, pushbutton, LED
EXT-TN-1072693 WRF04TD NTC10k NTC10k, pushbutton, LED
EXT-TN-1072709 WRF04TD NTC10kPRE NTC10k Precon, pushbuton, LED
-
0
+
II I I I
-
0
+
II I I I
DTP40FRWP40FRW
-
0
+
I
II
AUTO 0
III
II I I I
WRF04PST
(P) Setpoint (P) Setpoint
(T) Pushbutton
(D) Status LED
(S) Fanspeed
WRF04 (P) Setpoint
(T) Pushbutton
WRF04 sensor Room operating panel, temperature sensor
WRF04 TRA Room operating panel, 4...20mA temperature output
WRF04 TRV Room operating panel, 0...10V temperature output
WRF04P sensor Room operating panel, potentiometer, temperature sensor
WRF04PS sensor Room operating panel, potentiometer, fan speed, temperature sensor
WRF04T sensor Room operating panel, pushbutton, temperature sensor
WRF04TD sensor Room operating panel, pushbutton, LED, temperature sensor

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V1.1 02.2012 · Subject to modification
Room Operating Panel WRF04
Technical data
Security advice !
Mounting advice
Standards CE conformity
EN conformity
2004/108/EEC EMC directive
- EN60730-1(2000) Interference resistance
- EN60730-1(2000) Emitted interference
The installation and assembly of electrical equipment may only be performed by a skilled electrician.
The modules must not be used with equipment that supports, directly or indirectly, human health or life or with applications that can result in
danger for people or animals.
The devices are supplied in an operational status. Installation is made by means of rawl plugs and screws (accessory) to the smooth wall
surface. For wiring, the snap-on lid must be separated from the base plate.
Installation must be made on representative places for the room temperature, to avoid a falsification of the measuring result. Solar radiation
and draught should be avoided. If the device is mounted on standard flush box, the end of the installation tube in the flush box must be sealed,
so as to avoid any draught in the tube falsifying the measuring result.
Power supply
Power consumption
Measuring range
Output
Accuracy@21°C
Potentiometer (P)
Rotary switch (S)
Presence key (T)
Status LED (D)
Clamps
Enclosure
Protection
Cable entry
Ambient temperature
Transport
Weight
- TRV : DC 15-24V(±10%) / AC 24V(±10%)
- TRA : DC 15-24V(±10%)
- TRV : max. 12mA / DC 24V
- TRA : max. 20mA / DC 24V
Adjustable at the transducer
- TRA1 : -50°C...+50°C
- TRA3 : 0°C...+50°C
- TRA8 : -15°C...+35°C
- TRV1 : -50°C...+50°C
- TRV3 : 0°C...+50°C
- TRV8 : -15°C...+35°C
- Sensor : depending on sensor used
- TRV : 0...10V, min. load 5kΩ
- TRA : 4...20mA, max. load 700Ω / DC 24V
- Sensor : depending on sensor used
- TRV/TRA : 1% of full scale
Output resistance 1kΩ or 10kΩ, 3 wire, max.
load 0.25W
5 stages (Auto,0,I,II,III), max. load 5VA
Close contact, max. load 600mW
Colour green, supply voltage DC 15-24V /
AC 24V
Terminal screws, max. 1.5mm²
For wall mounting, material ASA,
colour pure white, similar to RAL9010
IP30 according to EN60529
From behind or side-mounted entry from top /
below
-35...70°C
-35...70°C / max. 85% RH, non-condensing
50g
General Data
1.
2.
Open cover here
Base plate

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V1.1 02.2012 · Subject to modification
Room Operating Panel WRF04
Electrical connection
Location and accuracy of room sensor
Surface and flush mounting
Build up of self heating by electrical dissipated power
Terminal connection plan
The devices are constructed for the operation of protective low voltage (SELV). For the electrical connection, the technical data of the
corresponding device is valid. With regard to passive sensors (e.g. PT100 etc.) in 2 wire conductor versions, the wire resistance of the supply
wire has to be considered. It is likely that the same has to be compensated by the following electronics. Due to the self heating, the wire current
affects the accuracy of the measurement. Therefore it should not exceed 1mA.
Sensing devices with transducers should in principle be operated in the middle of the measuring range to avoid deviations at the measuring
end points. The ambient temperature of the transducer electronics should be kept constant.
The transducers must be operated at constant supply voltage. The adjustment of the measuring ranges is made by changing the bonding
jumpers (see terminal connection diagram). The output value in the new measuring range is available after approximately 2 seconds.
Besides a suitable representative mounting place, corresponding to the room temperature, the accuracy of the temperature measurement also
depends directly on the temperature dynamics of the wall. It is important that the flush socket is completely closed at the wall side, so that the
circulation of air may take place through the gaps in the cover. Otherwise, deviations in temperature measurement will occur due to uncon-
trolled air circulation. Furthermore, the temperature sensor should not be covered by furnitures, etc. A mounting place next to doors (occurring
draught) or windows (colder outside wall) should be avoided.
Room temperature sensors with electronic components always have a dissipated power, which affects the temperature measurement of the
ambient air. The dissipation in active temperature sensors shows a linear increase with rising operating voltage. This dissipated power has to
be considered when measuring temperature. In case of a fixed operating voltage, this is normally done by adding or reducing a constant offset
value. As transducers (TRA or TRV) work with a variable operating voltage, only one operating voltage can be taken into consideration, for
reasons of production engineering. Transducers 0-10V / 4-20mA have a standard setting at a operating voltage of DC 24V. Therefore at this
voltage, the expected measuring error of the output signal will be the least. As for other operating voltages, the offset error will be increased or
lowered by a changing power loss of the sensor electronics. If a re-cablibration should become necessary later directly on the sensor, this can
be done by means of a trimming potentiometer on the sensor board (For sensors with LON-interface, a re-calibration can be done via
corresponding software variable SNVT).
Remark: Occurred draft leads to a better carrying-off of dissipated power at the sensor. Thus, temporal limited fluctuations might occur upon
temperature measurement.
The temperature dynamics of the wall influence the measurement result of the sensor. Various wall types (brick, concrete, dividing and hollow
brickwork) have different behaviour with regard to thermal variations. A solid concrete wall responds to thermal fluctuations within a room in a
much slower way than a light-weight structure wall. Room temperature sensors installed in flush boxes, have a longer response time to thermal
variations. In an extreme case, they detect the radiant heat of the wall even if the air temperature in the room is lower. The quicker the dynam-
ics of the wall (temperature acceptance of the wall) or the longer the selected inquiry interval of the temperature sensor, the smaller are the
deviations limited in time.
WRF04 Sensor
WRF04 TRV
WRF04 TRA
12
11
10
9
1
Sensor
(1) 3
(2) 4
(2) 5
(1) 2
4-wire
(2) 4
(1) 3
Sensor
2-wire
(1) 3
(2) 4
(2) 5
Sensor
3-wire
WRF04 P Sensor (Sensor, Potentiometer)
WRF04 PTD Sensor (Sensor, Potentiometer, Pushbutton, Status LED)
12
11
10
9
8
7
6
5
4
3
2
1
Notice:
Depending on respective design, the device has a dierent conguration of terminals. The
connection plan attached to each device is valid!
!
Measuring range adjustment
-50°C....+50°C
-10°C....+120°C
0°C....+50°C
0°C....+160°C
0°C....+250°C
-15°C....+35°C
T T
UB
15-24V=
24V~
OUT GND UB
DC 15-24V
GND/OUT
4-20mA
Oset adjustment
-3K +3K
0K
TRV TRA

4
V1.1 02.2012 · Subject to modification
Room Operating Panel WRF04
Dimensions (mm)