In the conditions of the modern market, pump and mixing units for the VALTEC and Oventrop warm floor deserve special attention. Designs are universal in use. "Valtek" is designed to adjust the temperature to 60 degrees Celsius, "Aventrop" to - 90. When choosing a product, you should pay attention to the level of permissible pressure. In the first case, it is 10 bar, in the second - 6.
Brief comparison
Oventrop is convenient in a bathhouse or bathtub; it is used to quickly warm rooms. Manufacturers recommend laying pipes under a large layer of concrete. VALTEC eliminates the need for a complete pump. Oventrop is ready to offer warm water walls and other interesting solutions, used together with heated floors, allowing to achieve the optimal mode in the building.
VALTEC pumping and mixing units for a warm floor are pleasing with a large number of accessories, additional automation, which is very convenient for creating a “smart home” system. For a more detailed acquaintance below are brief characteristics of the devices.
VALTEC COMBIMIX: Key Features
COMBI is a manifold block equipped with a thermostatic head with a separate immersion temperature sensor. The design is equipped with flow meters and manual valves for adjusting the heating of the liquid, automatic air vents and drainage.
Pumping and mixing units for VALTEC floor heating are characterized by the following parameters:
- The cross section of the collectors is 1 inch (25, 4 mm).
- The number of nozzles - 12.
- The cross-section of the pipes is ¾ inch, the thread is external, the connection according to the Euroconus standard.
- The temperature regime of water in the system is up to 90 ° C, pressure is up to 10 bar.
- The length of the pumping system is 18 cm.
- The limits of temperature settings are 20-60 ° C.
- The coefficient of throughput is 2.75 m3 / hour.
Performance characteristics
Pump and mixing units for underfloor heating are used to create a circulation system of pipes with a low temperature regime of the liquid. Comfort microclimate adjustment is carried out by controlling the flow of fluid and flow in the return, the relationship of the circuits.
The operation of mixing units is carried out in the heating system of floors, walls, open areas, greenhouse and greenhouse soil. Designs are used in conjunction with collectors, observing an intercenter distance of 20 cm. The pump-mixing unit for a warm floor has small dimensions, which is very convenient when placed in small areas.
What tasks does the COMBI system solve?
The unit allows you to increase the intensity of the passage of fluid in the floor hinges and reduce the temperature to a predetermined level. This is facilitated by mixing it with chilled water coming from the hinges of the “warm floor” system. The COMBI system is designed for thermal loads up to 20 kW.
The collector cabinet has a distributor connected to the unit for connecting heating circuits (to the right of the COMBI unit). The feed manifold houses balancing valves with a float flow meter for coordinated operation of the turns. In the absence of balancing between the loops, the liquid will pass along a short path, ignoring long turns.
The heated liquid enters the VALTEC floor heating pump and mixing unit through a thermostat valve. Installing the temperature sensor head allows automatic valve adjustment (opening / closing). Maintaining a predetermined heating of the liquid corresponds to the established level of heating of the "warm floor" system (20-60 ° C).
On the return side of the collector are placed adjustment valves for connecting servos, which allow you to control the temperature in the rooms using a relay. Regulation is carried out manually by means of caps included in the package.
Block assignment
The pump and mixing unit for the underfloor heating system is designed to mix water from the radiator system with cold liquid coming from the circuits of the “warm floor” system. It is moved using a circulation pump. From the unit, liquid enters the supply manifold and passes along the contours of the floor system. In this case, the temperature of the liquid decreases, heating the building, and returns to the collector. From the return, the cold liquid passes through the node, the cycle repeats.
Temperature control
To adjust the temperature regime at the inlet of the unit is placed a control valve with a thermal head. The scheme of the pump and mixing unit for a warm floor indicates the presence of an external temperature sensor placed in front of the supply manifold. Liquid heating in the system is set manually on the scale of the thermal head. With increasing parameters, the valve automatically closes, stopping the flow of hot coolant into the assembly. When the water cools, the valve provides access to the hot fluid. This allows you to ensure a constant temperature at the outlet of the unit.
Two manual balancing valves are provided to adjust the design ratio between the heated and cold liquid entering the pump inlet . The pump-mixing unit for the underfloor heating system, installed by itself, has the first valve on the return manifold. It allows you to adjust the volume of cold coolant entering the mixing unit. The second valve is installed at the outlet of the assembly, in front of the connection pipe to the return radiator circuit. It helps to adjust the volume of heated fluid entering the site.
When the mode is set correctly, the thermostat valve takes a middle position and affects the increase or decrease in the supply of warm water to the unit. The setting facilitates the interconnected operation of the heating circuit with other room systems. In the absence of balancing, the VALTEC COMBIMIX floor heating pump and mixing unit pumps more liquid through itself than is calculated, taking it from other systems.
The need for thermal relay
For automatic temperature control are room relays connected to collector servos. While maintaining a comfortable microclimate in the room, heating is not performed, the valve is closed on the manifold. When the temperature drops below the set value, the thermal relay provides power to the servo drive, the pipe opens. With closed loops, the bypass valve of the unit is activated, the liquid circulates in a smaller circle due to bypass, preventing overload of the pump.
Principle of Operation COMBI.S
To work with the weather dependence sensor VT.K200.M, a pump and mixing unit for the VALTEC COMBI.S floor heating has been developed. Instead of the thermal head of the relay valve fluid, an analog servo drive is installed, operating from the controller as scheduled. For external temperature conditions, appropriate heating of the coolant is provided. This affects the rare actuation of room thermostats when opening windows or doors. Underfloor heating allows you to maintain an accurate design level, eliminating fluctuations around the set parameters from the maximum (with the drive open) to the minimum. The comfort of the microclimate is at a higher level.
On COMBI.S nodes, the temperature regime of the coolant is determined by the controller according to the schedule set by the user and sensor data for measuring the level of heating of the liquid and air. Similar devices include the pump-mixing unit for the Oventrop floor heating.
The circulation pump allows you to accelerate the passage of fluid at the return. Part of it comes from the feed circuit. With the return passage, the flow of the cooled liquid is divided into 2 parts, approaching the pump system and the main unit. The ratio of the flow towards the pump and the supply is adjusted via valves. If the flow rate of the return pipe does not correspond to the set parameters (collector valves are closed), the bypass valve is activated, which is necessary for a constant flow of fluid circulating through the pump. External monitoring of the operation of the unit is carried out by weather-dependent thermal relays.
Oventrop Blocks
The system is designed to accommodate low-temperature room heating circuits with forced circulation. The main task of the device is to mix the liquid from the return.
Classification of nodes:
- Bypass and locking-connecting group (Multiflex FZB, VCE and VZB).
- A rotary series ("Multiblock" TF and FZB).
- Corner version of devices ("Multiblock" T, "Multiflex" F VCE and F ZBU).
- Pass-through type of devices ("Multiblock" T).
- The connecting group ("Multiflex" , and ).
- Pump-mixing series ("Reguflur").
Characteristic features of nodes
Design parameters:
- water supply - 3.5 m3 / h;
- power - 90 W;
- temperature in the supply circuit - 50-95 degrees Celsius;
- limit of working pressure - 6 bar;
- adjustment of temperature conditions - from 20 to 50 degrees Celsius;
- voltage - 230 V / 50 Hz.
The units are used in underfloor heating systems and in individual Oventrop pumping stations. In the first case, they are connected to a metal comb for floor heating (for example, the Regufloor H model), allowing you to combine radiator and panel heating.
For a decentralized normalization of the temperature regime in the supply circuit, the Regufloor H unit is used. Its operation provides automatic operation in buildings with an area of up to 200 m2 and a heat consumption of about 75 W / m2.
Design Features
The package includes the main elements:
- Three-way valves equipped with a connecting thread M 30x1.5 mm cross-section 2 cm.
- Thermal relay with patch sensors and a heat-conducting base.
- Energy-saving circulation pump with integrated electric power control.
- Thermostat with the maximum limit to maintain an optimal microclimate.
To create a weather-dependent adjustment, the Oventrop Regufloor HW series collector group is used. The unit is supplied ready-made for quick connection. It allows you to connect from 2 to 12 circuits and is used when connecting systems with 2-4 pipes.
The Regufloor HX series makes it possible to separate floor heating systems and radiator pipes through a heat exchanger. The control valve is located at the input of the primary circuit. Temperature parameters are set using immersion sensors in the secondary circuit.
Customer reviews are positive for all pump and mixing units - both companies are tested and meet the basic requirements for quick installation and reliable operation.