Small surface control station
Product information
Small surface control station
for Fonterra radiant heating and cooling, regulation of the supply temperature (constant), combination of underfloor heating and radiators with different temperature levels
| Year built (from): | 01.01.2010 |
Trade mark rights exist for this document; for further information, go to viega.com/legal .
Target groups
The information in this instruction manual is directed at the following groups of people:
Heating and plumbing experts and trained personnel
Qualified electricians
Operators
Individuals without the abovementioned training or qualification are not permitted to mount, install and, if required, maintain this product. This restriction does not extend to possible operating instructions.
The installation of Viega products must take place in accordance with the general rules of engineering and the Viega instructions for use.
Labelling of notes
Warning and advisory texts are set aside from the remainder of the text and are labelled with the relevant pictographs.
DANGER!
This symbol warns of possible life-threatening injury.
WARNING!
This symbol warns of possible serious injury.
CAUTION!
This symbol warns of possible injury.
NOTICE!
This symbol warns of possible damage to property.
INFO!
This symbol gives additional information and hints.
About this translated version
This instruction for use contains important information about the choice of product or system, assembly and commissioning as well as intended use and, if required, maintenance measures. The information about the products, their properties and application technology are based on the current standards in Europe (e.g. EN) and/or in Germany (e.g. DIN/DVGW).
Some passages in the text may refer to technical codes in Europe/Germany. These should serve as recommendations in the absence of corresponding national regulations. The relevant national laws, standards, regulations, directives and other technical provisions take priority over the German/European directives specified in this manual: The information herein is not binding for other countries and regions; as said above, they should be understood as a recommendation.
Standards and regulations
The following standards and regulations apply to Germany / Europe and are provided as a support feature.
Regulations from section: Application areas
Regulations from section: Filling the system
Regulations from section: Limiting the underfloor supply temperature
Regulations from section: Disposal
Intended use
Areas of application
The small surface control station is intended for regulating the temperature of surface heating systems at a preselected fixed target value. The setpoint value can be set steplessly on the thermostat head between 20 and 70 °C. Limitation of the setting range according to minimum and maximum temperature is possible.
The small surface control station is used in heating installations whose consumers (e.g. radiators) are replaced by low-temperature heating surfaces (e.g. underfloor heating or wall heating).
Pump (Wilo-Para)
The high-efficiency circulation pump of the Wilo-Para series is used exclusively for circulating media in hot-water heating systems and similar systems with constantly changing flow rates.
NOTICE!
Be sure to introduce only ready-to-use mixtures into the system. Do not use the pump to mix the media in the system.
Permitted media
Heating water in accordance with current regulations, see Regulations from section: Application areas
Water-glycol mixture with a maximum share of 50% glycol
* glycol has a higher viscosity than water. If glycol is added, the delivery data of the pump must be corrected according to the mixing ratio.
Any use beyond this is considered misuse and will invalidate any liability claims.
Product description
Overview
- 1 - Boiler return
- 2 - Return regulating valve (preset: open by one turn)
- 3 - Heating circuit supply
- 4 - Thermometer
- 5 - Flow quantity gauge
- 6 - Safety contact thermostat (factory setting 60 °C)
- 7 - Filling / drainage valve
- 8 - Pump
- 9 - Filling / drainage valve
- 10 - Protective cap
- 11 - Heating circuit return
- 12 - Thermostat head
- 13 - Boiler supply
Displays on the pump control element
- 1 Operating / fault notification LED
- 2 Control type
- 3 Operating button
- 4 Characteristic line
Operating / fault notification LED
LED is green during normal operation.
LED illuminates/blinks when there is a fault.
Display of selected control type
Δp-v
Δp-c
Constant speed
Display of the selected characteristic line (I, II, III) within the control type
Technical data
| 1) | Pressure difference primary side to control station at least 100 hPa (100 mbar) |
| 2) | See the pump manufacturer's plate. |
Pump (Wilo-Para)
Materials
Operating mode
The supply temperature of the heating circuits is kept constant in the small surface control station by controlled addition of hot water from the heat generator. The target value for the supply temperature is set at the thermostat head. When there is an operating fault, an additional temperature limiter switches off the pump when the temperature is excessive to prevent damage to the surface heating. The switching point of the temperature limiter must be at least 10 K above the setpoint value of the thermostat head.
Pump control types
The pump has the following control types:
INFO!
For use in surface heating elements Viega recommends the control type constant differential pressure Δp-c.
See also Setting the control type .
Differenzdruck variabel Δp-v (I, II, III)
Recommended for two-pipe heating installations with radiators to reduce flow noises at the thermostat valves.
Constant differential pressure Δp-c (I, II, III)
Recommendation for underfloor heating or large-dimensioned pipelines or all applications without changeable pipeline characteristic lines (e.g. storage loading pumps), as well as single-pipe heating installations with radiators.
The control keeps the set delivery head constant, irrespective of the delivered volumetric flow.
Constant speed (I, II, III) (factory setting)
Recommended for systems with invariable system resistance that require a constant volumetric flow.
Handling
Assembly information
Installation dimensions
Installation and connection dimensions
Height |
|---|
Width |
Depth |
connection |
Assembly
Wall mounting
NOTICE!
The small surface control station is not suitable for use in splash water zones.
-
Install the small surface control station flush in a wall cut-out or a pre-wall.
Connecting pipes
-
Use a pipe shear (model 5341) to cut the pipe to length at right angles.
-
Fit the pipe end with one of the two connectors.
Left: Push the union nut, the clamping ring and the adapter for the connection screw fitting onto the pipe.
Right: Push the connection screw fitting with SC‑Contur on the pipe until the pipe end is visible in the window of the press sleeve.
-
Connect the connection line with the manifold.
Left: Manually tighten the union nut while pushing the pipe up as far as it will go.
Right: Use a suitable press tool to press the connection screw fitting with SC‑Contur and the pipe. Manually tighten the union nut.
-
Use a fork spanner SW 24 to hold the output connection in place, and a fork spanner SW 27 / SW 30 to tighten the union nut.
Setting the flowthrough volume
-
Remove the protective caps.
-
Use a ventilation key to close the valve in clockwise direction (= small value at flow control unit).
-
Open the valve in counter-clockwise direction until the desired volumetric flow is indicated at the flow quantity gauge.
-
Repeat the process with the other valves.
-
Check the settings on the flow quantity gauge and adjust if necessary.
Commissioning
Making the electrical connection
DANGER!
Danger due to electrical current
An electric shock can lead to burns and serious injury and even death.
Only allow electrical work to be carried out by qualified electricians.
Always de-energise the connection cable before work is commenced.
The circulation pump and the contact thermostat are factory wired. Depending on the installation situation, there are different ways to connect the 230 V connection cable. Additional system components may be required.
- 1 Factory wired
Additional components |
|---|
Power connection |
Control |
Filling the control station
INFO!
General information on opening and closing of valves and outlets
Use the protective caps (1) to close the valves.
Use a ventilation key (2) to close the flow quantity gauge.
For long-term closure of individual outlets, screw on a ¾ inch metal cap with seal (3).
Requirements:
The control station and the manifold are properly connected.
The heating water meets the requirements of the applicable guidelines, see also Regulations from section: Filling the system .
-
De-energise the control station.
-
Close the ball valves to lock the control station on the boiler side.
-
Close all heating circuits at the manifold.
It is sufficient to close the valves at the return flow beam of the manifold with the protective caps.
-
Connect the filling water hose to the filling / drainage valve on the supply bar of the manifold.
-
Open the filling / drainage valve on the supply and return bars with the square ring spinner integrated into the cap.
-
Fill the control station with water.
-
Collect any escaping water in a suitable container or let it drain.
-
Then once again close both filling / drainage valves and screw on the caps again.
-
The control station is completely filled with water.
Flushing the heating circuits
NOTICE!
Only flush the heating circuits in the flow direction to prevent damage to the system.
The backflow preventer above the pump prevents a short-circuit line being created that would prevent correct flushing and/or filling of the heating circuits. During the flushing and after the flushing equipment is closed the system pressure may not exceed 0.25 MPa (2.5 bar) as otherwise the safety valve opens and heating water discharges.
Requirements:
The control station is filled with water.
The control station is currentless.
-
Connect one filling and drainage line to each of the filling and drainage valves integrated into the manifold.
-
Open the first heating circuit and flush it in the flushing direction until all air and contamination are fully removed from the heating circuit.
-
After flushing, close the heating circuit once more.
-
Repeat flushing for every heating circuit.
-
After you have flushed the entire system, open and adjust all heating circuits.
-
Re-connect the pump power supply.
NOTICE!
Ventilate the pump after the control station and heating circuits are filled for the first time, see also Venting the pump .
Hydraulic adjustment of heating circuits
For the hydraulic balancing of the small surface control station, refer to the following diagrams:
Setting the supply regulating valve
- 1 - pressure loss [hPa]
- 2 - volume flow [l/h]
Setting the return regulating valve
- 1 - pressure loss [hPa]
- 2 - volume flow [l/h]
Total pressure loss
- 1 - pressure loss [hPa]
- 2 - volume flow [l/h]
Approximate values for setting the return regulating valve
In the delivery state, the return regulating valve is open by one turn.
-
If the actual temperature fails to reach the setpoint temperature in the manifold with maximum heat requirement, open the regulation valve in small increments until the setpoint is reached.
Setting the heating circuit supply temperature
NOTICE!
Set the heating circuit supply temperature of the small surface control station at full load and high boiler temperature.
-
Fully open all return valves at the manifold bar (setting screw is flush with valve casing).
-
Set and check the required supply temperature at the thermostat head.
Control
Setting the underfloor supply temperature
When maximum output is required (nominal output), set the boiler supply temperature at least 15 °C higher than the desired supply temperature in the underfloor heating.
The handwheel of the thermostat head has a scale going from 1 to 7 and enables stepless adjustment of the supply temperature between 20 and 70 °C. Refer to the table for the respective setpoint temperature:
Scale value |
|---|
Setpoint temperature in °C |
Limiting the underfloor supply temperature
Usually, surface heating does not use supply temperatures of more than 50 °C. The temperature in the boiler or heating circuit is often significantly higher (e.g. 70/50 °C or 60/40 °C). To prevent damage to the floor structure due to overtemperature of the heating medium, Viega recommends limiting the target value of the supply temperature at the thermostat head in accordance with the respective installation situation.
How to limit the supply temperature:
Requirements:
The desired setpoint value is set at the thermostat head (e.g. level 3 = 37 °C).
The set temperature roughly corresponds to the display on the thermometer.
- 1 Locks for temperature limitation
- 2 Marking arrow
- 3 Scale values
-
Place the locking devices before and after the marker arrow.
-
The temperature value is fixed and protected from accidental re-adjustment.
Maximum supply temperature of the heating water
*
| Maximum supply temperature in accordance with current regulations, see Regulations from section: Limiting the underfloor supply temperature |
| * | Maximum supply temperature in accordance with current regulations, see Regulations from section: Limiting the underfloor supply temperature |
Safety temperature limiter
When an operating fault occurs, the safety temperature limiter switches the recirculating pump off to prevent the underfloor heating becoming excessively hot. To avoid unintentional triggering, set the temperature at the safety temperature limiter at least 10 K above the desired supply temperature (factory setting 60 °C).
NOTICE!
Ensure the maximum permitted underfloor heating temperature close to the heating cable is not exceeded.
Programming the pump settings
Venting the pump
Requirements:
The control station is full and the heating circuits are vented.
-
To ventilate the pump, press the operating button for 3 seconds (see also Displays on the pump control element ).
-
The ventilation function starts and lasts for 10 minutes.
The LEDs in the top and bottom row blink alternately at intervals of 1 second.
After venting, the LED display shows the previously set values of the pump.
-
To break off the procedure early, press the operating button for 3 seconds.
Setting the control type
-
Briefly press the operating button (approx. 1 second).
-
The LEDs display the set control type and characteristic line.
-
To change the setting, press the operating button several times until the LEDs display the desired combination of control mode and characteristic line.
INFO!The LED selection of the control types and the corresponding characteristic lines is carried out clockwise.
Lock / unlock keys
-
To activate the key lock, press the operating button for 8 seconds.
-
As soon as the LEDs of the selected setting flash, release the control button.
-
The LEDs flash permanently at intervals of 1 second.
The key lock is activated.
-
Deactivating the key lock works in the same way as activating it.
Manual restart
The pump automatically attempts a restart if a blockage is detected. If the pump does not restart automatically, perform a manual restart.
-
To activate the manual restart, press and release the control button for 5 seconds.
-
The restart function starts and takes 10 minutes.
The LEDs flash one after the other in a clockwise direction.
-
To break off the procedure early, press the operating button for 5 seconds.
Activating factory setting
-
To activate the factory setting, disconnect the pump from the power supply while holding down the control button (4 seconds).
-
All LEDs flash for 1 second.
The LEDs of the last setting flash for 1 second.
-
Re-connect the pump power supply.
-
The pump runs in factory setting (delivery state).
Decommission
In case of damage to the connection cable or other electrical components, stop the pump immediately.
-
Disconnect the pump from the power supply.
INFO!
In the event of a malfunction, contact the Viega Service Centre.
Disposal
Separate the product and packaging materials (e. g. paper, metal, plastic or non-ferrous metals) and dispose of in accordance with valid national legal requirements.
Electronic components and batteries must not be put in the domestic waste but must be disposed of appropriately in conformity with the applicable directives, see Regulations from section: Disposal .