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Technical Description The control unit is required if the ventilation system is to be used for experiments with temperature control. The control unit is connected between the ventilation system and an external source of hot water using quick-action couplings. With such an arrangement it is possible to demonstrate room temperature control in ventilation systems. Only original parts were used for the control unit....
Ventilation systems are often used in building services engineering to achieve the required air change rates in the individual rooms. The ventilation air can also be heated or cooled by heat exchangers. A ventilation system is a preliminary stage for an air conditioning system in which the air can also be humidified or dehumidified. The system is assembled from standard industrial components. The plexiglas windows and exposed ductwork ensure that normally hidden components can be seen: inspection covers and fire dampers, filters, heaters / coolers, louvre damper, etc. The original function is fully retained. The system emphasises ventilation rather than air conditioning. Depending on the operating mode, heating or cooling, a supply of hot or cold water is required in the laboratory. The system requires a three-phase mains supply. With the additional module, a room temperature control system can be realised with the ventilation system....
The designed for training in ventilation engineering. Once the trainee has built a ventilation system independently, the effects of bends, branches, regulator flaps on the airflow rate, the air velocity, as well as the pressure loss can be investigated. For this purpose, an inclined tube manometer with 2 measuring ranges and a digital handheld unit for the measurement of the air velocity are included, along with numerous other components. The individual components in the ventilation system are fitted with pressure measuring glands. The power consumption of the fan is indicated on the switch cabinet using a voltmeter and an ammeter. The components are the same as those used in ventilation engineering....
Technical Description A pump circulates water through four radiators. The temperature of the radiators is set using thermostatic valves. A digital controller keeps the room temperature constant by driving the fourway mixing valve. This valve sets the temperature of the boiler return and the heating feed flow. Cold water connections enable the heat generated to be dissipated. The differential pressure across the pipe system is limited using a relief valve. Temperatures can be read on dial thermometers. Supplies of hot and cold water are required for operation. The training panel can be fitted to the Universal Stand....
Technical Description An electrically heated pressure vessel is mounted on the panel. The vessel can be filled via different pipe sections. One pipe section is equipped with a system of safety devices for protecting a sealed water heater. The pressure vessel is also equipped with a thermal discharge safety device that discharges to a blow-off pipe. When the pressure or temperature level set is exceeded, the safety devices are tripped. Pressure and temperature in the system are displayed. A supply of water is required for operation. The training panel can be fitted to the Universal Stand....
Technical Description Is used to illustrate the functioning of a gas combination water heater. The main components of the gas water heater are clearly arranged on a panel to allow better understanding. A system diagram also illustrates the function. The HL 530 allows demonstration of a heating circuit and representation of domestic water heating. A plate heat exchanger is used to simulate a radiator. Cold water is fed through the heat exchanger as a heating load. A sight glass allows observation of the gas flame in the burner. Built-in thermometers and flow meters allow the recording of measured values to determine the power and efficiency. The unit is operated with liquid gas (propane, connection pressure 50mbar) and is therefore independent of any pre-installed natural gas lines. The panel is attached to the Universal Stand (available as an accessory)....
Technical Description The demonstrates the basic functioning of an original gas burner and its typical behaviour in case of faults. Standard industrial components are used. All operating states of the burner are simulated, allowing this demo unit to be operated without gas and flames. The unit is therefore totally non-hazardous and has no gas or waste gas lines. On the front panel is a graphical representation of the controller unit connection. Important electrical monitoring points (controller unit terminals) on the burner are accessible for fault analysis using laboratory sockets and bridges on the front panel. Faults can thus be checked either during operation under voltage or with no voltage as an isolated component. ...
Technical Description The system contains a commercially available forced air gas burner. The elements for a gas control loop are combined into one compact fitting. The burner function is simulated using air making it possible to use the unit in training rooms without hazard. The compressed air is supplied by a small integrated compressor. A pre-programmed pocket calculator is fitted to the panel which enables the required gas flow rate to be calculated as a function of altitude, type of gas, admission pressure and heat required. ...
Technical Description The housing and heat exchanger of the instantaneous heater have been removed to clearly show the internal components. For safety reasons, the trainer is operated with air. Burner flames are simulated using an array of LEDs. A diaphragm air pump with pressure regulator generates the compressed air required for operation at the correct admission pressure. All the necessary safety functions such as lighting the pilot, thermocouple flame safeguard and temperature cut-out are simulated electronically using a PLC. The PLC is programmed to simulate a total of 12 different faults. A supply of water is required....
Technical Description The experiments are performed with air. A compressed air connection with reservoir and pressure reducer are included on the panel. The panel has two pipe circuits that can be individually selected. Various leaks can be simulated in one gas line. The other line represents a normal gas supply pipe. A gas meter is fitted in each line. Typical industrial components are used. Leak detection and installation work can be performed on gas pipes by the trainee. A compressed air supply is required for operation. The training panel can be fitted to the Universal Stand....
Technical Description Using the test stand various safety and control devices can be investigated and evaluated. Typical industrial components are used. PC data acquisition allows the data to be displayed graphically. A supply of water and compressed air is necessary for operation....
Technical Description The system contains all the stipulated safety fittings and tank protection devices. The double-walled oil tank includes filling and outlet devices. Indicators such as a level gauge and a leak detector are fitted to a metal panel. The system is fully functional so it is possible to use it for the supply of oil to laboratory equipment as well as performing the tests and demonstrations. The tank capacity is approx. 350 litres....
Technical Description The unit is portable and is thus suitable for field use. Power can be supplied either using a rechargeable battery, or from the mains. The unit enables, amongst other aspects, the O2, CO, CO2 and nitrogen oxides in flue gasses from boilers to be measured at the same time as the flue gas and combustion air temperature are measured. Along with the display, the unit is equipped with a thermal printer and a PC interface. Apart from a PC, it is also possible to connect, for example, the Large Display.. ...
Technical Description The unit features viewing windows built into the sides of the boiler which enable the flame to be observed. The immediate results of different burner settings are directly visible. The unit contains a heatable domestic water tank as a second load. The system is equipped with all stipulated safety devices. All water circuit temperatures and flow rates together with the oil pressure and combustion chamber temperature are measured. An integrated hot water circuit with a plate heat exchanger simulates a central heating circuit. All measured data is transmitted to a PC and displayed. The system is supplied with an oil burner and oil tank as standard. Gas burners are available on request....
Technical Description Different operating points can be investigated by changing the oil pressure after the preset boiler water temperature has been reached. An integrated hot water circuit with plate heat exchanger simulates the heating circuit in a house. The heat generated can be dissipated via cooling water connections, enabling continuous operation. The heat transferred can be calculated. Connections for an external heating circuit are provided on the rear of the boiler. This allows to be expanded into a complete heating system using training panels....
Technical Description The unit is equipped with an oil burner. The oil pressure at the burner, the combustion chamber temperature, measured with a thermocouple, and the preheat temperature of the oil are indicated on an additional digital measuring unit. A small oil tank is fitted on the lower shelf of the trolley. The boiler features two viewing windows for observing the flame. The heat generated can be dissipated using a plate heat exchanger and additional cooling water connections, enabling the unit to be operated continuously. The exhaust gas can be studied in detail with the exhaust gas analyser....
Technical Description The system contains two independent heating circuits that are equipped with a three-way mixing valve and a four-way mixing valve. The heat provided by an electric boiler can be dissipated via four different radiators. To investigate the full load behaviour of the boiler over an extended period, a plate heat exchanger is fitted in the domestic water circuit. The system has a closed water circuit with expansion vessel. Relevant temperatures and pressures are indicated on easy-to-read instruments. The system is controlled using a state-of-the-art digital controller. The controller can be configured over the RS232 interface. A supply of three-phase mains electricity is required for operation....
Technical Description The panel contains a complete closed heating circuit with circulating pump, electrical heater, heat exchanger for dissipating heat, various pipe sections, fittings and a pressure expansion vessel. The panel demonstrates the function of a temperature controller in a heating system using a standard PID controller or a software controller. The pressure drop across different elements in a pipe system can be investigated. Using the data acquisition card supplied, the data is transmitted to a PC for processing. The training panel can be fitted to the Universal Stand....
Technical Description The training panel clearly demonstrates the function of a heating controller. The electronic controller, room thermostat and mixer valve are real components. The water, indoor and outdoor temperatures are set using potentiometers. Lights indicate the function of the pumps and the boiler. The components are clearly laid out on the system diagram to show their relationships. The system reacts rapidly because the temperature parameters are manually set by potentiometers. The Universal Stand is a recommended accessory....
Technical Description Hydraulic compensation is used to limit the amount of water to that calculated for each radiator. Compensation ensures that all radiators can be supplied with hot water at all operating points according to their thermal requirement. The compensation is performed using preset thermostatic valves. The system uses commercially available components to implement three heating circuits with radiators, thermostatic valves and a circulating pump. Once filled, the system is independent of the water mains or heating feed and return flow pipe connections. However, it can be operated in conjunction with a heating circuit....
Technical Description The panel contains a pipe system with four radiators. Each radiator has an air bleed, a thermostatic valve and lockshield valve. Rotameters indicate the flow rate through each individual radiator and for the entire system. Connections for cooling water make it possible to dissipate the heat supplied by the hot water. All water connections are equipped with quick-release hose couplings. It is possible to assemble a complete heating system by adding other training panels from the series. The training panel can be fitted to the Universal Stand....
Technical Description Using this panel the function of a normal expansion vessel is examined and a pressure-volume characteristic recorded. The expansion vessel is filled with water from a supply tank. The pressure is generated using a small compressor and adjusted using a pressure regulating valve. The amount of water taken up by the expansion vessel is read on a scale on the supply tank. The training panel can be fitted to the Universal Stand....
Technical Description The panel contains a pipe system with two circulating pumps. It is possible to switch between series and parallel operation using ball valves. Two rotameters with different measuring ranges are provided for the measurement of the flow rate. Manometers indicate the pressure at all relevant points in the system. The temperature can be read on a bimetallic thermometer. The panel has a closed water circuit with expansion vessel and is thus independent of the water mains. The training panel can be fitted to the Universal Stand....
Technical Description The training panel was designed for heating and plumbing trainees. A three-way mixing valve in a heating system controls the circulation and feed flow temperature of the water flowing in the heating system. A pump circulates the water in the pipe system. The differential pressure across the pipe system is limited using a relief valve. Bimetallic thermometers indicate the temperatures at all relevant points in the heating circuit. It is possible to assemble a complete heating system by adding other training panels from the Series. A supply of hot water is required to operate the panel. The training panel can be fitted to the Universal Stand....
Technical Description The friction loss occurs at elbows, bends, shut-off devices and also at special pipe fittings such as a thermostatic valve or a reducer. The pressure differences can be shown on a multiple water tube manometer as head loss. The panel uses a closed water circuit with supply tank and pump. A supply of mains electricity is necessary for operation....
Technical Description Terms such as the static pressure of a fluid at rest (hydrostatic pressure), static pressure of a flowing liquid or the pressure loss between two points can be demonstrated on this unit. The experimental set-up includes a transparent supply tank with a pipe section connected as a drain. The initial pressure is kept constant by the overflow in the head tank. The pressure at six distributed measuring points on the pipe section can be measured on a multiple tube manometer. A supply of water is required. The training panel can be fitted to the Universal Stand....
Technical Description Four measured sections are fitted to the panel, each comprising ten elbows and bends in different layouts. The overall length of each section is the same. It is possible to measure the pressure loss and to investigate the effects of material, surface roughness and flow rate. The water flows through a pipe with a manual valve and flow meter before passing through the measured sections. The section under test is connected with a hose. The training panel needs a supply of water. The training panel can be fitted to the Universal Stand....
Technical Description Five different pipe sections with various types of shut-off valve are fitted to the training panel. The pipe sections can be individually selected using ball valves. One pipe section with ball valve is made of transparent PVC so that the flow can be clearly observed. A battery-operated digital differential pressure gauge is supplied. The flow rate is adjusted using valves. A supply of water is required for operation. The training panel can be fitted to the Universal Stand....
Technical Description Four different pipe sections are fitted to a metal panel. Each section can be individually selected using ball valves. The measuring points are 1 m apart. To keep measuring inaccuracies as low as possible, the pressure is measured using annular chambers. The training panel is supplied from the water mains. The flow rate is adjusted using valves and measured using a rotameter. The pressure drop over a pipe section is measured using a digital, battery-operated differential manometer. The training panel can be fitted to the Universal Stand....
Technical Description Four measuring sections with different thermometers can be individually selected using ball valves. The temperatures measured using the resistance thermometer and the thermocouple are displayed digitally. The bimetallic dial and liquid-in-glass thermometers are direct indicating instruments. The response of the measuring devices for different flows can be investigated. The flow rate is measured with a rotameter. The effect of different installation positions and methods on measurement accuracy can be investigated. A supply of hot water is required for operation. The training panel can be fitted to the Universal Stand....
Technical Description The training panel comprises original components as used in heating and sanitation systems and is therefore relevant in practice. It is fitted to the universal stand. There are six expansion sections. One of the sections is fitted with a compensator. The elongation of the pipes is indicated on dial gauges. A force measuring device enables the expansion force to be determined. A supply of hot water is required for the operation of the panel....
Technical Description The unit contains sensors with digital displays to measure temperature, pres-sure and flow rate required for measurements and demonstrations on heating and sanitary systems. Various water circuits and a gas circuit can be selected. It is possible to adjust settings and investigate the performance effects while testing the function of external heaters (e.g. gas heaters, combination heaters, instantaneous heaters). An integrated plate heat exchanger allows the measur-ing system to operate without additional loads. Measured values can be trans-ferred to a PC....
Technical Description The mounting frame for a training panel and the universal measuring system is fitted to a sturdy trolley. This enables a flexible, standalone trainer to be set up using the supply bench, one of the training panels and the measuring system. A switch / fuse box provides two single phase and two three-phase electrical outputs. Hot and cold water connections are provided. A heating system can be connected to the heating feed and return flow pipes and a gas connection is also provided. A fibreglass drip tray is fitted under the mounting frame for the training panels. A lockable cupboard for the secure storage of documentation or small parts is mounted under the fibreglass work area. The photograph shows the together with the measuring system and the training panel. The bench requires a supply of water, electricity and gas....
Technical Description The training panel was designed for heating and plumbing trainees. The four-way mixing valve in a heating system controls the circulation and feed flow temperatures of the water flowing in the heating system and the boiler return flow temperature. It is possible to add the hot water required and to connect radiators. The differential pressure across the pipe system is limited using a relief valve. Bimetallic thermometers indicate relevant temperatures. A supply of hot water is required for operation. The training panel can be fitted to the Universal Stand....
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